/*
   Copyright (C) 1999-2006 Id Software, Inc. and contributors.
   For a list of contributors, see the accompanying CONTRIBUTORS file.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

//
// Texture Window
//
// Leonardo Zide (leo@lokigames.com)
//

#include "texwindow.h"

#include <gtk/gtk.h>

#include "debugging/debugging.h"
#include "warnings.h"

#include "ifilesystem.h"
#include "iundo.h"
#include "igl.h"
#include "iarchive.h"
#include "moduleobserver.h"

#include <set>
#include <string>
#include <vector>

#include <uilib/uilib.h>

#include "signal/signal.h"
#include "math/vector.h"
#include "texturelib.h"
#include "string/string.h"
#include "shaderlib.h"
#include "os/file.h"
#include "os/path.h"
#include "stream/memstream.h"
#include "stream/textfilestream.h"
#include "stream/stringstream.h"
#include "cmdlib.h"
#include "texmanip.h"
#include "textures.h"
#include "convert.h"

#include "gtkutil/menu.h"
#include "gtkutil/nonmodal.h"
#include "gtkutil/cursor.h"
#include "gtkutil/widget.h"
#include "gtkutil/glwidget.h"
#include "gtkutil/messagebox.h"

#include "error.h"
#include "map.h"
#include "qgl.h"
#include "select.h"
#include "brush_primit.h"
#include "brushmanip.h"
#include "patchmanip.h"
#include "plugin.h"
#include "qe3.h"
#include "gtkdlgs.h"
#include "gtkmisc.h"
#include "mainframe.h"
#include "findtexturedialog.h"
#include "surfacedialog.h"
#include "patchdialog.h"
#include "groupdialog.h"
#include "preferences.h"
#include "shaders.h"
#include "commands.h"

#define NOTEX_BASENAME "notex"
#define SHADERNOTEX_BASENAME "shadernotex"

bool TextureBrowser_showWads()
{
    return !string_empty(g_pGameDescription->getKeyValue("show_wads"));
}

void TextureBrowser_queueDraw(TextureBrowser &textureBrowser);

bool string_equal_start(const char *string, StringRange start)
{
    return string_equal_n(string, start.first, start.last - start.first);
}

typedef std::set<CopiedString> TextureGroups;

void TextureGroups_addWad(TextureGroups &groups, const char *archive)
{
    if (extension_equal(path_get_extension(archive), "wad")) {
#if 1
        groups.insert(archive);
#else
                                                                                                                                CopiedString archiveBaseName( path_get_filename_start( archive ), path_get_filename_base_end( archive ) );
		groups.insert( archiveBaseName );
#endif
    }
}

typedef ReferenceCaller<TextureGroups, void(const char *), TextureGroups_addWad> TextureGroupsAddWadCaller;

namespace {
    bool g_TextureBrowser_shaderlistOnly = false;
    bool g_TextureBrowser_fixedSize = true;
    bool g_TextureBrowser_filterMissing = false;
    bool g_TextureBrowser_filterFallback = true;
    bool g_TextureBrowser_enableAlpha = true;
}

CopiedString g_notex;
CopiedString g_shadernotex;

bool isMissing(const char *name);

bool isNotex(const char *name);

bool isMissing(const char *name)
{
    if (string_equal(g_notex.c_str(), name)) {
        return true;
    }
    if (string_equal(g_shadernotex.c_str(), name)) {
        return true;
    }
    return false;
}

bool isNotex(const char *name)
{
    if (string_equal_suffix(name, "/" NOTEX_BASENAME)) {
        return true;
    }
    if (string_equal_suffix(name, "/" SHADERNOTEX_BASENAME)) {
        return true;
    }
    return false;
}

void TextureGroups_addShader(TextureGroups &groups, const char *shaderName)
{
    const char *texture = path_make_relative(shaderName, "textures/");

    // hide notex / shadernotex images
    if (g_TextureBrowser_filterFallback) {
        if (isNotex(shaderName)) {
            return;
        }
        if (isNotex(texture)) {
            return;
        }
    }

    if (texture != shaderName) {
        const char *last = path_remove_directory(texture);
        if (!string_empty(last)) {
            groups.insert(CopiedString(StringRange(texture, --last)));
        }
    }
}

typedef ReferenceCaller<TextureGroups, void(const char *), TextureGroups_addShader> TextureGroupsAddShaderCaller;

void TextureGroups_addDirectory(TextureGroups &groups, const char *directory)
{
    groups.insert(directory);
}

typedef ReferenceCaller<TextureGroups, void(const char *), TextureGroups_addDirectory> TextureGroupsAddDirectoryCaller;

class DeferredAdjustment {
    gdouble m_value;
    guint m_handler;

    typedef void ( *ValueChangedFunction )(void *data, gdouble value);

    ValueChangedFunction m_function;
    void *m_data;

    static gboolean deferred_value_changed(gpointer data)
    {
        reinterpret_cast<DeferredAdjustment *>( data )->m_function(
                reinterpret_cast<DeferredAdjustment *>( data )->m_data,
                reinterpret_cast<DeferredAdjustment *>( data )->m_value
        );
        reinterpret_cast<DeferredAdjustment *>( data )->m_handler = 0;
        reinterpret_cast<DeferredAdjustment *>( data )->m_value = 0;
        return FALSE;
    }

public:
    DeferredAdjustment(ValueChangedFunction function, void *data) : m_value(0), m_handler(0), m_function(function),
                                                                    m_data(data)
    {
    }

    void flush()
    {
        if (m_handler != 0) {
            g_source_remove(m_handler);
            deferred_value_changed(this);
        }
    }

    void value_changed(gdouble value)
    {
        m_value = value;
        if (m_handler == 0) {
            m_handler = g_idle_add(deferred_value_changed, this);
        }
    }

    static void adjustment_value_changed(ui::Adjustment adjustment, DeferredAdjustment *self)
    {
        self->value_changed(gtk_adjustment_get_value(adjustment));
    }
};


class TextureBrowser;

typedef ReferenceCaller<TextureBrowser, void(), TextureBrowser_queueDraw> TextureBrowserQueueDrawCaller;

void TextureBrowser_scrollChanged(void *data, gdouble value);


enum StartupShaders {
    STARTUPSHADERS_NONE = 0,
    STARTUPSHADERS_COMMON,
};

void TextureBrowser_hideUnusedExport(const Callback<void(bool)> &importer);

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_hideUnusedExport> TextureBrowserHideUnusedExport;

void TextureBrowser_showShadersExport(const Callback<void(bool)> &importer);

typedef FreeCaller<void(
        const Callback<void(bool)> &), TextureBrowser_showShadersExport> TextureBrowserShowShadersExport;

void TextureBrowser_showShaderlistOnly(const Callback<void(bool)> &importer);

typedef FreeCaller<void(
        const Callback<void(bool)> &), TextureBrowser_showShaderlistOnly> TextureBrowserShowShaderlistOnlyExport;

void TextureBrowser_fixedSize(const Callback<void(bool)> &importer);

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_fixedSize> TextureBrowserFixedSizeExport;

void TextureBrowser_filterMissing(const Callback<void(bool)> &importer);

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_filterMissing> TextureBrowserFilterMissingExport;

void TextureBrowser_filterFallback(const Callback<void(bool)> &importer);

typedef FreeCaller<void(
        const Callback<void(bool)> &), TextureBrowser_filterFallback> TextureBrowserFilterFallbackExport;

void TextureBrowser_enableAlpha(const Callback<void(bool)> &importer);

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_enableAlpha> TextureBrowserEnableAlphaExport;

class TextureBrowser {
public:
    int width, height;
    int originy;
    int m_nTotalHeight;

    CopiedString shader;

    ui::Window m_parent{ui::null};
    ui::GLArea m_gl_widget{ui::null};
    ui::Widget m_texture_scroll{ui::null};
    ui::TreeView m_treeViewTree{ui::New};
    ui::TreeView m_treeViewTags{ui::null};
    ui::Frame m_tag_frame{ui::null};
    ui::ListStore m_assigned_store{ui::null};
    ui::ListStore m_available_store{ui::null};
    ui::TreeView m_assigned_tree{ui::null};
    ui::TreeView m_available_tree{ui::null};
    ui::Widget m_scr_win_tree{ui::null};
    ui::Widget m_scr_win_tags{ui::null};
    ui::Widget m_tag_notebook{ui::null};
    ui::Button m_search_button{ui::null};
    ui::Widget m_shader_info_item{ui::null};

    std::set<CopiedString> m_all_tags;
    ui::ListStore m_all_tags_list{ui::null};
    std::vector<CopiedString> m_copied_tags;
    std::set<CopiedString> m_found_shaders;

    ToggleItem m_hideunused_item;
    ToggleItem m_hidenotex_item;
    ToggleItem m_showshaders_item;
    ToggleItem m_showshaderlistonly_item;
    ToggleItem m_fixedsize_item;
    ToggleItem m_filternotex_item;
    ToggleItem m_enablealpha_item;

    guint m_sizeHandler;
    guint m_exposeHandler;

    bool m_heightChanged;
    bool m_originInvalid;

    DeferredAdjustment m_scrollAdjustment;
    FreezePointer m_freezePointer;

    Vector3 color_textureback;
// the increment step we use against the wheel mouse
    std::size_t m_mouseWheelScrollIncrement;
    std::size_t m_textureScale;
// make the texture increments match the grid changes
    bool m_showShaders;
    bool m_showTextureScrollbar;
    StartupShaders m_startupShaders;
// if true, the texture window will only display in-use shaders
// if false, all the shaders in memory are displayed
    bool m_hideUnused;
    bool m_rmbSelected;
    bool m_searchedTags;
    bool m_tags;
// The uniform size (in pixels) that textures are resized to when m_resizeTextures is true.
    int m_uniformTextureSize;

// Return the display width of a texture in the texture browser
    int getTextureWidth(qtexture_t *tex)
    {
        int width;
        if (!g_TextureBrowser_fixedSize) {
            // Don't use uniform size
            width = (int) (tex->width * ((float) m_textureScale / 100));
        } else if
                (tex->width >= tex->height) {
            // Texture is square, or wider than it is tall
            width = m_uniformTextureSize;
        } else {
            // Otherwise, preserve the texture's aspect ratio
            width = (int) (m_uniformTextureSize * ((float) tex->width / tex->height));
        }
        return width;
    }

// Return the display height of a texture in the texture browser
    int getTextureHeight(qtexture_t *tex)
    {
        int height;
        if (!g_TextureBrowser_fixedSize) {
            // Don't use uniform size
            height = (int) (tex->height * ((float) m_textureScale / 100));
        } else if (tex->height >= tex->width) {
            // Texture is square, or taller than it is wide
            height = m_uniformTextureSize;
        } else {
            // Otherwise, preserve the texture's aspect ratio
            height = (int) (m_uniformTextureSize * ((float) tex->height / tex->width));
        }
        return height;
    }

    TextureBrowser() :
            m_texture_scroll(ui::null),
            m_hideunused_item(TextureBrowserHideUnusedExport()),
            m_hidenotex_item(TextureBrowserFilterFallbackExport()),
            m_showshaders_item(TextureBrowserShowShadersExport()),
            m_showshaderlistonly_item(TextureBrowserShowShaderlistOnlyExport()),
            m_fixedsize_item(TextureBrowserFixedSizeExport()),
            m_filternotex_item(TextureBrowserFilterMissingExport()),
            m_enablealpha_item(TextureBrowserEnableAlphaExport()),
            m_heightChanged(true),
            m_originInvalid(true),
            m_scrollAdjustment(TextureBrowser_scrollChanged, this),
            color_textureback(0.25f, 0.25f, 0.25f),
            m_mouseWheelScrollIncrement(64),
            m_textureScale(50),
            m_showShaders(true),
            m_showTextureScrollbar(true),
            m_startupShaders(STARTUPSHADERS_NONE),
            m_hideUnused(false),
            m_rmbSelected(false),
            m_searchedTags(false),
            m_tags(false),
            m_uniformTextureSize(96)
    {
    }
};

void ( *TextureBrowser_textureSelected )(const char *shader);


void TextureBrowser_updateScroll(TextureBrowser &textureBrowser);


const char *TextureBrowser_getComonShadersName()
{
    const char *value = g_pGameDescription->getKeyValue("common_shaders_name");
    if (!string_empty(value)) {
        return value;
    }
    return "Common";
}

const char *TextureBrowser_getComonShadersDir()
{
    const char *value = g_pGameDescription->getKeyValue("common_shaders_dir");
    if (!string_empty(value)) {
        return value;
    }
    return "common/";
}

inline int TextureBrowser_fontHeight(TextureBrowser &textureBrowser)
{
    return GlobalOpenGL().m_font->getPixelHeight();
}

const char *TextureBrowser_GetSelectedShader(TextureBrowser &textureBrowser)
{
    return textureBrowser.shader.c_str();
}

void TextureBrowser_SetStatus(TextureBrowser &textureBrowser, const char *name)
{
    IShader *shader = QERApp_Shader_ForName(name);
    qtexture_t *q = shader->getTexture();
    StringOutputStream strTex(256);
    strTex << name << " W: " << Unsigned(q->width) << " H: " << Unsigned(q->height);
    shader->DecRef();
    g_pParentWnd->SetStatusText(g_pParentWnd->m_texture_status, strTex.c_str());
}

void TextureBrowser_Focus(TextureBrowser &textureBrowser, const char *name);

void TextureBrowser_SetSelectedShader(TextureBrowser &textureBrowser, const char *shader)
{
    textureBrowser.shader = shader;
    TextureBrowser_SetStatus(textureBrowser, shader);
    TextureBrowser_Focus(textureBrowser, shader);

    if (FindTextureDialog_isOpen()) {
        FindTextureDialog_selectTexture(shader);
    }

    // disable the menu item "shader info" if no shader was selected
    IShader *ishader = QERApp_Shader_ForName(shader);
    CopiedString filename = ishader->getShaderFileName();

    if (filename.empty()) {
        if (textureBrowser.m_shader_info_item != NULL) {
            gtk_widget_set_sensitive(textureBrowser.m_shader_info_item, FALSE);
        }
    } else {
        gtk_widget_set_sensitive(textureBrowser.m_shader_info_item, TRUE);
    }

    ishader->DecRef();
}


CopiedString g_TextureBrowser_currentDirectory;

/*
   ============================================================================

   TEXTURE LAYOUT

   TTimo: now based on a rundown through all the shaders
   NOTE: we expect the Active shaders count doesn't change during a Texture_StartPos .. Texture_NextPos cycle
   otherwise we may need to rely on a list instead of an array storage
   ============================================================================
 */

class TextureLayout {
public:
// texture layout functions
// TTimo: now based on shaders
    int current_x, current_y, current_row;
};

void Texture_StartPos(TextureLayout &layout)
{
    layout.current_x = 8;
    layout.current_y = -8;
    layout.current_row = 0;
}

void Texture_NextPos(TextureBrowser &textureBrowser, TextureLayout &layout, qtexture_t *current_texture, int *x, int *y)
{
    qtexture_t *q = current_texture;

    int nWidth = textureBrowser.getTextureWidth(q);
    int nHeight = textureBrowser.getTextureHeight(q);
    if (layout.current_x + nWidth > textureBrowser.width - 8 &&
        layout.current_row) { // go to the next row unless the texture is the first on the row
        layout.current_x = 8;
        layout.current_y -= layout.current_row + TextureBrowser_fontHeight(textureBrowser) + 4;
        layout.current_row = 0;
    }

    *x = layout.current_x;
    *y = layout.current_y;

    // Is our texture larger than the row? If so, grow the
    // row height to match it

    if (layout.current_row < nHeight) {
        layout.current_row = nHeight;
    }

    // never go less than 96, or the names get all crunched up
    layout.current_x += nWidth < 96 ? 96 : nWidth;
    layout.current_x += 8;
}

bool TextureSearch_IsShown(const char *name)
{
    std::set<CopiedString>::iterator iter;

    iter = GlobalTextureBrowser().m_found_shaders.find(name);

    if (iter == GlobalTextureBrowser().m_found_shaders.end()) {
        return false;
    } else {
        return true;
    }
}

// if texture_showinuse jump over non in-use textures
bool Texture_IsShown(IShader *shader, bool show_shaders, bool hideUnused)
{
    // filter missing shaders
    // ugly: filter on built-in fallback name after substitution
    if (g_TextureBrowser_filterMissing) {
        if (isMissing(shader->getTexture()->name)) {
            return false;
        }
    }
    // filter the fallback (notex/shadernotex) for missing shaders or editor image
    if (g_TextureBrowser_filterFallback) {
        if (isNotex(shader->getName())) {
            return false;
        }
        if (isNotex(shader->getTexture()->name)) {
            return false;
        }
    }

    if (g_TextureBrowser_currentDirectory == "Untagged") {
        std::set<CopiedString>::iterator iter;

        iter = GlobalTextureBrowser().m_found_shaders.find(shader->getName());

        if (iter == GlobalTextureBrowser().m_found_shaders.end()) {
            return false;
        } else {
            return true;
        }
    }

    if (!shader_equal_prefix(shader->getName(), "textures/")) {
        return false;
    }

    if (!show_shaders && !shader->IsDefault()) {
        return false;
    }

    if (hideUnused && !shader->IsInUse()) {
        return false;
    }

    if (GlobalTextureBrowser().m_searchedTags) {
        if (!TextureSearch_IsShown(shader->getName())) {
            return false;
        } else {
            return true;
        }
    } else {
        if (!shader_equal_prefix(shader_get_textureName(shader->getName()),
                                 g_TextureBrowser_currentDirectory.c_str())) {
            return false;
        }
    }

    return true;
}

void TextureBrowser_heightChanged(TextureBrowser &textureBrowser)
{
    textureBrowser.m_heightChanged = true;

    TextureBrowser_updateScroll(textureBrowser);
    TextureBrowser_queueDraw(textureBrowser);
}

void TextureBrowser_evaluateHeight(TextureBrowser &textureBrowser)
{
    if (textureBrowser.m_heightChanged) {
        textureBrowser.m_heightChanged = false;

        textureBrowser.m_nTotalHeight = 0;

        TextureLayout layout;
        Texture_StartPos(layout);
        for (QERApp_ActiveShaders_IteratorBegin(); !QERApp_ActiveShaders_IteratorAtEnd(); QERApp_ActiveShaders_IteratorIncrement()) {
            IShader *shader = QERApp_ActiveShaders_IteratorCurrent();

            if (!Texture_IsShown(shader, textureBrowser.m_showShaders, textureBrowser.m_hideUnused)) {
                continue;
            }

            int x, y;
            Texture_NextPos(textureBrowser, layout, shader->getTexture(), &x, &y);
            textureBrowser.m_nTotalHeight = std::max(textureBrowser.m_nTotalHeight,
                                                     abs(layout.current_y) + TextureBrowser_fontHeight(textureBrowser) +
                                                     textureBrowser.getTextureHeight(shader->getTexture()) + 4);
        }
    }
}

int TextureBrowser_TotalHeight(TextureBrowser &textureBrowser)
{
    TextureBrowser_evaluateHeight(textureBrowser);
    return textureBrowser.m_nTotalHeight;
}

inline const int &min_int(const int &left, const int &right)
{
    return std::min(left, right);
}

void TextureBrowser_clampOriginY(TextureBrowser &textureBrowser)
{
    if (textureBrowser.originy > 0) {
        textureBrowser.originy = 0;
    }
    int lower = min_int(textureBrowser.height - TextureBrowser_TotalHeight(textureBrowser), 0);
    if (textureBrowser.originy < lower) {
        textureBrowser.originy = lower;
    }
}

int TextureBrowser_getOriginY(TextureBrowser &textureBrowser)
{
    if (textureBrowser.m_originInvalid) {
        textureBrowser.m_originInvalid = false;
        TextureBrowser_clampOriginY(textureBrowser);
        TextureBrowser_updateScroll(textureBrowser);
    }
    return textureBrowser.originy;
}

void TextureBrowser_setOriginY(TextureBrowser &textureBrowser, int originy)
{
    textureBrowser.originy = originy;
    TextureBrowser_clampOriginY(textureBrowser);
    TextureBrowser_updateScroll(textureBrowser);
    TextureBrowser_queueDraw(textureBrowser);
}


Signal0 g_activeShadersChangedCallbacks;

void TextureBrowser_addActiveShadersChangedCallback(const SignalHandler &handler)
{
    g_activeShadersChangedCallbacks.connectLast(handler);
}

void TextureBrowser_constructTreeStore();

class ShadersObserver : public ModuleObserver {
    Signal0 m_realiseCallbacks;
public:
    void realise()
    {
        m_realiseCallbacks();
        TextureBrowser_constructTreeStore();
    }

    void unrealise()
    {
    }

    void insert(const SignalHandler &handler)
    {
        m_realiseCallbacks.connectLast(handler);
    }
};

namespace {
    ShadersObserver g_ShadersObserver;
}

void TextureBrowser_addShadersRealiseCallback(const SignalHandler &handler)
{
    g_ShadersObserver.insert(handler);
}

void TextureBrowser_activeShadersChanged(TextureBrowser &textureBrowser)
{
    TextureBrowser_heightChanged(textureBrowser);
    textureBrowser.m_originInvalid = true;

    g_activeShadersChangedCallbacks();
}

struct TextureBrowser_ShowScrollbar {
    static void Export(const TextureBrowser &self, const Callback<void(bool)> &returnz)
    {
        returnz(self.m_showTextureScrollbar);
    }

    static void Import(TextureBrowser &self, bool value)
    {
        self.m_showTextureScrollbar = value;
        if (self.m_texture_scroll) {
            self.m_texture_scroll.visible(self.m_showTextureScrollbar);
            TextureBrowser_updateScroll(self);
        }
    }
};


/*
   ==============
   TextureBrowser_ShowDirectory
   relies on texture_directory global for the directory to use
   1) Load the shaders for the given directory
   2) Scan the remaining texture, load them and assign them a default shader (the "noshader" shader)
   NOTE: when writing a texture plugin, or some texture extensions, this function may need to be overriden, and made
   available through the IShaders interface
   NOTE: for texture window layout:
   all shaders are stored with alphabetical order after load
   previously loaded and displayed stuff is hidden, only in-use and newly loaded is shown
   ( the GL textures are not flushed though)
   ==============
 */

bool endswith(const char *haystack, const char *needle)
{
    size_t lh = strlen(haystack);
    size_t ln = strlen(needle);
    if (lh < ln) {
        return false;
    }
    return !memcmp(haystack + (lh - ln), needle, ln);
}

bool texture_name_ignore(const char *name)
{
    StringOutputStream strTemp(string_length(name));
    strTemp << LowerCase(name);

    return
            endswith(strTemp.c_str(), ".specular") ||
            endswith(strTemp.c_str(), ".glow") ||
            endswith(strTemp.c_str(), ".bump") ||
            endswith(strTemp.c_str(), ".diffuse") ||
            endswith(strTemp.c_str(), ".blend") ||
            endswith(strTemp.c_str(), ".alpha") ||
            endswith(strTemp.c_str(), "_norm") ||
            endswith(strTemp.c_str(), "_bump") ||
            endswith(strTemp.c_str(), "_glow") ||
            endswith(strTemp.c_str(), "_gloss") ||
            endswith(strTemp.c_str(), "_pants") ||
            endswith(strTemp.c_str(), "_shirt") ||
            endswith(strTemp.c_str(), "_reflect") ||
            endswith(strTemp.c_str(), "_alpha") ||
            0;
}

class LoadShaderVisitor : public Archive::Visitor {
public:
    void visit(const char *name)
    {
        IShader *shader = QERApp_Shader_ForName(
                CopiedString(StringRange(name, path_get_filename_base_end(name))).c_str());
        shader->DecRef();
    }
};

void TextureBrowser_SetHideUnused(TextureBrowser &textureBrowser, bool hideUnused);

ui::Widget g_page_textures{ui::null};

void TextureBrowser_toggleShow()
{
    GroupDialog_showPage(g_page_textures);
}


void TextureBrowser_updateTitle()
{
    GroupDialog_updatePageTitle(g_page_textures);
}


class TextureCategoryLoadShader {
    const char *m_directory;
    std::size_t &m_count;
public:
    using func = void(const char *);

    TextureCategoryLoadShader(const char *directory, std::size_t &count)
            : m_directory(directory), m_count(count)
    {
        m_count = 0;
    }

    void operator()(const char *name) const
    {
        if (shader_equal_prefix(name, "textures/")
            && shader_equal_prefix(name + string_length("textures/"), m_directory)) {
            ++m_count;
            // request the shader, this will load the texture if needed
            // this Shader_ForName call is a kind of hack
            IShader *pFoo = QERApp_Shader_ForName(name);
            pFoo->DecRef();
        }
    }
};

void TextureDirectory_loadTexture(const char *directory, const char *texture)
{
    StringOutputStream name(256);
    name << directory << StringRange(texture, path_get_filename_base_end(texture));

    if (texture_name_ignore(name.c_str())) {
        return;
    }

    if (!shader_valid(name.c_str())) {
        globalOutputStream() << "Skipping invalid texture name: [" << name.c_str() << "]\n";
        return;
    }

    // if a texture is already in use to represent a shader, ignore it
    IShader *shader = QERApp_Shader_ForName(name.c_str());
    shader->DecRef();
}

typedef ConstPointerCaller<char, void(const char *), TextureDirectory_loadTexture> TextureDirectoryLoadTextureCaller;

class LoadTexturesByTypeVisitor : public ImageModules::Visitor {
    const char *m_dirstring;
public:
    LoadTexturesByTypeVisitor(const char *dirstring)
            : m_dirstring(dirstring)
    {
    }

    void visit(const char *minor, const _QERPlugImageTable &table) const
    {
        GlobalFileSystem().forEachFile(m_dirstring, minor, TextureDirectoryLoadTextureCaller(m_dirstring));
    }
};

void TextureBrowser_ShowDirectory(TextureBrowser &textureBrowser, const char *directory)
{
    if (TextureBrowser_showWads()) {
        Archive *archive = GlobalFileSystem().getArchive(directory);
        ASSERT_NOTNULL(archive);
        LoadShaderVisitor visitor;
        archive->forEachFile(Archive::VisitorFunc(visitor, Archive::eFiles, 0), "textures/");
    } else {
        g_TextureBrowser_currentDirectory = directory;
        TextureBrowser_heightChanged(textureBrowser);

        std::size_t shaders_count;
        GlobalShaderSystem().foreachShaderName(makeCallback(TextureCategoryLoadShader(directory, shaders_count)));
        globalOutputStream() << "Showing " << Unsigned(shaders_count) << " shaders.\n";

        if (g_pGameDescription->mGameType != "doom3") {
            // load remaining texture files

            StringOutputStream dirstring(64);
            dirstring << "textures/" << directory;

            Radiant_getImageModules().foreachModule(LoadTexturesByTypeVisitor(dirstring.c_str()));
        }
    }

    // we'll display the newly loaded textures + all the ones already in use
    TextureBrowser_SetHideUnused(textureBrowser, false);

    TextureBrowser_updateTitle();
}

void TextureBrowser_ShowTagSearchResult(TextureBrowser &textureBrowser, const char *directory)
{
    g_TextureBrowser_currentDirectory = directory;
    TextureBrowser_heightChanged(textureBrowser);

    std::size_t shaders_count;
    GlobalShaderSystem().foreachShaderName(makeCallback(TextureCategoryLoadShader(directory, shaders_count)));
    globalOutputStream() << "Showing " << Unsigned(shaders_count) << " shaders.\n";

    if (g_pGameDescription->mGameType != "doom3") {
        // load remaining texture files
        StringOutputStream dirstring(64);
        dirstring << "textures/" << directory;

        {
            LoadTexturesByTypeVisitor visitor(dirstring.c_str());
            Radiant_getImageModules().foreachModule(visitor);
        }
    }

    // we'll display the newly loaded textures + all the ones already in use
    TextureBrowser_SetHideUnused(textureBrowser, false);
}


bool TextureBrowser_hideUnused();

void TextureBrowser_hideUnusedExport(const Callback<void(bool)> &importer)
{
    importer(TextureBrowser_hideUnused());
}

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_hideUnusedExport> TextureBrowserHideUnusedExport;

void TextureBrowser_showShadersExport(const Callback<void(bool)> &importer)
{
    importer(GlobalTextureBrowser().m_showShaders);
}

typedef FreeCaller<void(
        const Callback<void(bool)> &), TextureBrowser_showShadersExport> TextureBrowserShowShadersExport;

void TextureBrowser_showShaderlistOnly(const Callback<void(bool)> &importer)
{
    importer(g_TextureBrowser_shaderlistOnly);
}

typedef FreeCaller<void(
        const Callback<void(bool)> &), TextureBrowser_showShaderlistOnly> TextureBrowserShowShaderlistOnlyExport;

void TextureBrowser_fixedSize(const Callback<void(bool)> &importer)
{
    importer(g_TextureBrowser_fixedSize);
}

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_fixedSize> TextureBrowser_FixedSizeExport;

void TextureBrowser_filterMissing(const Callback<void(bool)> &importer)
{
    importer(g_TextureBrowser_filterMissing);
}

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_filterMissing> TextureBrowser_filterMissingExport;

void TextureBrowser_filterFallback(const Callback<void(bool)> &importer)
{
    importer(g_TextureBrowser_filterFallback);
}

typedef FreeCaller<void(
        const Callback<void(bool)> &), TextureBrowser_filterFallback> TextureBrowser_filterFallbackExport;

void TextureBrowser_enableAlpha(const Callback<void(bool)> &importer)
{
    importer(g_TextureBrowser_enableAlpha);
}

typedef FreeCaller<void(const Callback<void(bool)> &), TextureBrowser_enableAlpha> TextureBrowser_enableAlphaExport;

void TextureBrowser_SetHideUnused(TextureBrowser &textureBrowser, bool hideUnused)
{
    if (hideUnused) {
        textureBrowser.m_hideUnused = true;
    } else {
        textureBrowser.m_hideUnused = false;
    }

    textureBrowser.m_hideunused_item.update();

    TextureBrowser_heightChanged(textureBrowser);
    textureBrowser.m_originInvalid = true;
}

void TextureBrowser_ShowStartupShaders(TextureBrowser &textureBrowser)
{
    if (textureBrowser.m_startupShaders == STARTUPSHADERS_COMMON) {
        TextureBrowser_ShowDirectory(textureBrowser, TextureBrowser_getComonShadersDir());
    }
}


//++timo NOTE: this is a mix of Shader module stuff and texture explorer
// it might need to be split in parts or moved out .. dunno
// scroll origin so the specified texture is completely on screen
// if current texture is not displayed, nothing is changed
void TextureBrowser_Focus(TextureBrowser &textureBrowser, const char *name)
{
    TextureLayout layout;
    // scroll origin so the texture is completely on screen
    Texture_StartPos(layout);

    for (QERApp_ActiveShaders_IteratorBegin(); !QERApp_ActiveShaders_IteratorAtEnd(); QERApp_ActiveShaders_IteratorIncrement()) {
        IShader *shader = QERApp_ActiveShaders_IteratorCurrent();

        if (!Texture_IsShown(shader, textureBrowser.m_showShaders, textureBrowser.m_hideUnused)) {
            continue;
        }

        int x, y;
        Texture_NextPos(textureBrowser, layout, shader->getTexture(), &x, &y);
        qtexture_t *q = shader->getTexture();
        if (!q) {
            break;
        }

        // we have found when texdef->name and the shader name match
        // NOTE: as everywhere else for our comparisons, we are not case sensitive
        if (shader_equal(name, shader->getName())) {
            int textureHeight = (int) (q->height * ((float) textureBrowser.m_textureScale / 100))
                                + 2 * TextureBrowser_fontHeight(textureBrowser);

            int originy = TextureBrowser_getOriginY(textureBrowser);
            if (y > originy) {
                originy = y;
            }

            if (y - textureHeight < originy - textureBrowser.height) {
                originy = (y - textureHeight) + textureBrowser.height;
            }

            TextureBrowser_setOriginY(textureBrowser, originy);
            return;
        }
    }
}

IShader *Texture_At(TextureBrowser &textureBrowser, int mx, int my)
{
    my += TextureBrowser_getOriginY(textureBrowser) - textureBrowser.height;

    TextureLayout layout;
    Texture_StartPos(layout);
    for (QERApp_ActiveShaders_IteratorBegin(); !QERApp_ActiveShaders_IteratorAtEnd(); QERApp_ActiveShaders_IteratorIncrement()) {
        IShader *shader = QERApp_ActiveShaders_IteratorCurrent();

        if (!Texture_IsShown(shader, textureBrowser.m_showShaders, textureBrowser.m_hideUnused)) {
            continue;
        }

        int x, y;
        Texture_NextPos(textureBrowser, layout, shader->getTexture(), &x, &y);
        qtexture_t *q = shader->getTexture();
        if (!q) {
            break;
        }

        int nWidth = textureBrowser.getTextureWidth(q);
        int nHeight = textureBrowser.getTextureHeight(q);
        if (mx > x && mx - x < nWidth
            && my < y && y - my < nHeight + TextureBrowser_fontHeight(textureBrowser)) {
            return shader;
        }
    }

    return 0;
}

/*
   ==============
   SelectTexture

   By mouse click
   ==============
 */
void SelectTexture(TextureBrowser &textureBrowser, int mx, int my, bool bShift)
{
    IShader *shader = Texture_At(textureBrowser, mx, my);
    if (shader != 0) {
        if (bShift) {
            if (shader->IsDefault()) {
                globalOutputStream() << "ERROR: " << shader->getName() << " is not a shader, it's a texture.\n";
            } else {
                ViewShader(shader->getShaderFileName(), shader->getName());
            }
        } else {
            TextureBrowser_SetSelectedShader(textureBrowser, shader->getName());
            TextureBrowser_textureSelected(shader->getName());

            if (!FindTextureDialog_isOpen() && !textureBrowser.m_rmbSelected) {
                UndoableCommand undo("textureNameSetSelected");
                Select_SetShader(shader->getName());
            }
        }
    }
}

/*
   ============================================================================

   MOUSE ACTIONS

   ============================================================================
 */

void TextureBrowser_trackingDelta(int x, int y, unsigned int state, void *data)
{
    TextureBrowser &textureBrowser = *reinterpret_cast<TextureBrowser *>( data );
    if (y != 0) {
        int scale = 1;

        if (state & GDK_SHIFT_MASK) {
            scale = 4;
        }

        int originy = TextureBrowser_getOriginY(textureBrowser);
        originy += y * scale;
        TextureBrowser_setOriginY(textureBrowser, originy);
    }
}

void TextureBrowser_Tracking_MouseDown(TextureBrowser &textureBrowser)
{
    textureBrowser.m_freezePointer.freeze_pointer(textureBrowser.m_parent, TextureBrowser_trackingDelta,
                                                  &textureBrowser);
}

void TextureBrowser_Tracking_MouseUp(TextureBrowser &textureBrowser)
{
    textureBrowser.m_freezePointer.unfreeze_pointer(textureBrowser.m_parent);
}

void TextureBrowser_Selection_MouseDown(TextureBrowser &textureBrowser, guint32 flags, int pointx, int pointy)
{
    SelectTexture(textureBrowser, pointx, textureBrowser.height - 1 - pointy, (flags & GDK_SHIFT_MASK) != 0);
}

/*
   ============================================================================

   DRAWING

   ============================================================================
 */

/*
   ============
   Texture_Draw
   TTimo: relying on the shaders list to display the textures
   we must query all qtexture_t* to manage and display through the IShaders interface
   this allows a plugin to completely override the texture system
   ============
 */
void Texture_Draw(TextureBrowser &textureBrowser)
{
    int originy = TextureBrowser_getOriginY(textureBrowser);

    glClearColor(textureBrowser.color_textureback[0],
                 textureBrowser.color_textureback[1],
                 textureBrowser.color_textureback[2],
                 0);
    glViewport(0, 0, textureBrowser.width, textureBrowser.height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glDisable(GL_DEPTH_TEST);
    if (g_TextureBrowser_enableAlpha) {
        glEnable(GL_BLEND);
        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    } else {
        glDisable(GL_BLEND);
    }
    glOrtho(0, textureBrowser.width, originy - textureBrowser.height, originy, -100, 100);
    glEnable(GL_TEXTURE_2D);

    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);

    int last_y = 0, last_height = 0;

    TextureLayout layout;
    Texture_StartPos(layout);
    for (QERApp_ActiveShaders_IteratorBegin(); !QERApp_ActiveShaders_IteratorAtEnd(); QERApp_ActiveShaders_IteratorIncrement()) {
        IShader *shader = QERApp_ActiveShaders_IteratorCurrent();

        if (!Texture_IsShown(shader, textureBrowser.m_showShaders, textureBrowser.m_hideUnused)) {
            continue;
        }

        int x, y;
        Texture_NextPos(textureBrowser, layout, shader->getTexture(), &x, &y);
        qtexture_t *q = shader->getTexture();
        if (!q) {
            break;
        }

        int nWidth = textureBrowser.getTextureWidth(q);
        int nHeight = textureBrowser.getTextureHeight(q);

        if (y != last_y) {
            last_y = y;
            last_height = 0;
        }
        last_height = std::max(nHeight, last_height);

        // Is this texture visible?
        if ((y - nHeight - TextureBrowser_fontHeight(textureBrowser) < originy)
            && (y > originy - textureBrowser.height)) {
            // borders rules:
            // if it's the current texture, draw a thick red line, else:
            // shaders have a white border, simple textures don't
            // if !texture_showinuse: (some textures displayed may not be in use)
            // draw an additional square around with 0.5 1 0.5 color
            if (shader_equal(TextureBrowser_GetSelectedShader(textureBrowser), shader->getName())) {
                glLineWidth(3);
                if (textureBrowser.m_rmbSelected) {
                    glColor3f(0, 0, 1);
                } else {
                    glColor3f(1, 0, 0);
                }
                glDisable(GL_TEXTURE_2D);

                glBegin(GL_LINE_LOOP);
                glVertex2i(x - 4, y - TextureBrowser_fontHeight(textureBrowser) + 4);
                glVertex2i(x - 4, y - TextureBrowser_fontHeight(textureBrowser) - nHeight - 4);
                glVertex2i(x + 4 + nWidth, y - TextureBrowser_fontHeight(textureBrowser) - nHeight - 4);
                glVertex2i(x + 4 + nWidth, y - TextureBrowser_fontHeight(textureBrowser) + 4);
                glEnd();

                glEnable(GL_TEXTURE_2D);
                glLineWidth(1);
            } else {
                glLineWidth(1);
                // shader border:
                if (!shader->IsDefault()) {
                    glColor3f(1, 1, 1);
                    glDisable(GL_TEXTURE_2D);

                    glBegin(GL_LINE_LOOP);
                    glVertex2i(x - 1, y + 1 - TextureBrowser_fontHeight(textureBrowser));
                    glVertex2i(x - 1, y - nHeight - 1 - TextureBrowser_fontHeight(textureBrowser));
                    glVertex2i(x + 1 + nWidth, y - nHeight - 1 - TextureBrowser_fontHeight(textureBrowser));
                    glVertex2i(x + 1 + nWidth, y + 1 - TextureBrowser_fontHeight(textureBrowser));
                    glEnd();
                    glEnable(GL_TEXTURE_2D);
                }

                // highlight in-use textures
                if (!textureBrowser.m_hideUnused && shader->IsInUse()) {
                    glColor3f(0.5, 1, 0.5);
                    glDisable(GL_TEXTURE_2D);
                    glBegin(GL_LINE_LOOP);
                    glVertex2i(x - 3, y + 3 - TextureBrowser_fontHeight(textureBrowser));
                    glVertex2i(x - 3, y - nHeight - 3 - TextureBrowser_fontHeight(textureBrowser));
                    glVertex2i(x + 3 + nWidth, y - nHeight - 3 - TextureBrowser_fontHeight(textureBrowser));
                    glVertex2i(x + 3 + nWidth, y + 3 - TextureBrowser_fontHeight(textureBrowser));
                    glEnd();
                    glEnable(GL_TEXTURE_2D);
                }
            }

            // draw checkerboard for transparent textures
            if (g_TextureBrowser_enableAlpha) {
                glDisable(GL_TEXTURE_2D);
                glBegin(GL_QUADS);
                int font_height = TextureBrowser_fontHeight(textureBrowser);
                for (int i = 0; i < nHeight; i += 8) {
                    for (int j = 0; j < nWidth; j += 8) {
                        unsigned char color = (i + j) / 8 % 2 ? 0x66 : 0x99;
                        glColor3ub(color, color, color);
                        int left = j;
                        int right = std::min(j + 8, nWidth);
                        int top = i;
                        int bottom = std::min(i + 8, nHeight);
                        glVertex2i(x + right, y - nHeight - font_height + top);
                        glVertex2i(x + left, y - nHeight - font_height + top);
                        glVertex2i(x + left, y - nHeight - font_height + bottom);
                        glVertex2i(x + right, y - nHeight - font_height + bottom);
                    }
                }
                glEnd();
                glEnable(GL_TEXTURE_2D);
            }

            // Draw the texture
            glBindTexture(GL_TEXTURE_2D, q->texture_number);
            GlobalOpenGL_debugAssertNoErrors();
            glColor3f(1, 1, 1);
            glBegin(GL_QUADS);
            glTexCoord2i(0, 0);
            glVertex2i(x, y - TextureBrowser_fontHeight(textureBrowser));
            glTexCoord2i(1, 0);
            glVertex2i(x + nWidth, y - TextureBrowser_fontHeight(textureBrowser));
            glTexCoord2i(1, 1);
            glVertex2i(x + nWidth, y - TextureBrowser_fontHeight(textureBrowser) - nHeight);
            glTexCoord2i(0, 1);
            glVertex2i(x, y - TextureBrowser_fontHeight(textureBrowser) - nHeight);
            glEnd();

            // draw the texture name
            glDisable(GL_TEXTURE_2D);
            glColor3f(1, 1, 1);

            glRasterPos2i(x, y - TextureBrowser_fontHeight(textureBrowser) + 5);

            // don't draw the directory name
            const char *name = shader->getName();
            name += strlen(name);
            while (name != shader->getName() && *(name - 1) != '/' && *(name - 1) != '\\') {
                name--;
            }

            GlobalOpenGL().drawString(name);
            glEnable(GL_TEXTURE_2D);
        }

        //int totalHeight = abs(y) + last_height + TextureBrowser_fontHeight(textureBrowser) + 4;
    }


    // reset the current texture
    glBindTexture(GL_TEXTURE_2D, 0);
    //qglFinish();
}

void TextureBrowser_queueDraw(TextureBrowser &textureBrowser)
{
    if (textureBrowser.m_gl_widget) {
        gtk_widget_queue_draw(textureBrowser.m_gl_widget);
    }
}


void TextureBrowser_setScale(TextureBrowser &textureBrowser, std::size_t scale)
{
    textureBrowser.m_textureScale = scale;

    TextureBrowser_queueDraw(textureBrowser);
}

void TextureBrowser_setUniformSize(TextureBrowser &textureBrowser, std::size_t scale)
{
    textureBrowser.m_uniformTextureSize = scale;

    TextureBrowser_queueDraw(textureBrowser);
}


void TextureBrowser_MouseWheel(TextureBrowser &textureBrowser, bool bUp)
{
    int originy = TextureBrowser_getOriginY(textureBrowser);

    if (bUp) {
        originy += int(textureBrowser.m_mouseWheelScrollIncrement);
    } else {
        originy -= int(textureBrowser.m_mouseWheelScrollIncrement);
    }

    TextureBrowser_setOriginY(textureBrowser, originy);
}

XmlTagBuilder TagBuilder;

enum {
    TAG_COLUMN,
    N_COLUMNS
};

void BuildStoreAssignedTags(ui::ListStore store, const char *shader, TextureBrowser *textureBrowser)
{
    GtkTreeIter iter;

    store.clear();

    std::vector<CopiedString> assigned_tags;
    TagBuilder.GetShaderTags(shader, assigned_tags);

    for (size_t i = 0; i < assigned_tags.size(); i++) {
        store.append(TAG_COLUMN, assigned_tags[i].c_str());
    }
}

void BuildStoreAvailableTags(ui::ListStore storeAvailable,
                             ui::ListStore storeAssigned,
                             const std::set<CopiedString> &allTags,
                             TextureBrowser *textureBrowser)
{
    GtkTreeIter iterAssigned;
    GtkTreeIter iterAvailable;
    std::set<CopiedString>::const_iterator iterAll;
    gchar *tag_assigned;

    storeAvailable.clear();

    bool row = gtk_tree_model_get_iter_first(storeAssigned, &iterAssigned) != 0;

    if (!row) { // does the shader have tags assigned?
        for (iterAll = allTags.begin(); iterAll != allTags.end(); ++iterAll) {
            storeAvailable.append(TAG_COLUMN, (*iterAll).c_str());
        }
    } else {
        while (row) // available tags = all tags - assigned tags
        {
            gtk_tree_model_get(storeAssigned, &iterAssigned, TAG_COLUMN, &tag_assigned, -1);

            for (iterAll = allTags.begin(); iterAll != allTags.end(); ++iterAll) {
                if (strcmp((char *) tag_assigned, (*iterAll).c_str()) != 0) {
                    storeAvailable.append(TAG_COLUMN, (*iterAll).c_str());
                } else {
                    row = gtk_tree_model_iter_next(storeAssigned, &iterAssigned) != 0;

                    if (row) {
                        gtk_tree_model_get(storeAssigned, &iterAssigned, TAG_COLUMN, &tag_assigned, -1);
                    }
                }
            }
        }
    }
}

gboolean TextureBrowser_button_press(ui::Widget widget, GdkEventButton *event, TextureBrowser *textureBrowser)
{
    if (event->type == GDK_BUTTON_PRESS) {
        if (event->button == 3) {
            if (GlobalTextureBrowser().m_tags) {
                textureBrowser->m_rmbSelected = true;
                TextureBrowser_Selection_MouseDown(*textureBrowser, event->state, static_cast<int>( event->x ),
                                                   static_cast<int>( event->y ));

                BuildStoreAssignedTags(textureBrowser->m_assigned_store, textureBrowser->shader.c_str(),
                                       textureBrowser);
                BuildStoreAvailableTags(textureBrowser->m_available_store, textureBrowser->m_assigned_store,
                                        textureBrowser->m_all_tags, textureBrowser);
                textureBrowser->m_heightChanged = true;
                textureBrowser->m_tag_frame.show();

                ui::process();

                TextureBrowser_Focus(*textureBrowser, textureBrowser->shader.c_str());
            } else {
                TextureBrowser_Tracking_MouseDown(*textureBrowser);
            }
        } else if (event->button == 1) {
            TextureBrowser_Selection_MouseDown(*textureBrowser, event->state, static_cast<int>( event->x ),
                                               static_cast<int>( event->y ));

            if (GlobalTextureBrowser().m_tags) {
                textureBrowser->m_rmbSelected = false;
                textureBrowser->m_tag_frame.hide();
            }
        }
    }
    return FALSE;
}

gboolean TextureBrowser_button_release(ui::Widget widget, GdkEventButton *event, TextureBrowser *textureBrowser)
{
    if (event->type == GDK_BUTTON_RELEASE) {
        if (event->button == 3) {
            if (!GlobalTextureBrowser().m_tags) {
                TextureBrowser_Tracking_MouseUp(*textureBrowser);
            }
        }
    }
    return FALSE;
}

gboolean TextureBrowser_motion(ui::Widget widget, GdkEventMotion *event, TextureBrowser *textureBrowser)
{
    return FALSE;
}

gboolean TextureBrowser_scroll(ui::Widget widget, GdkEventScroll *event, TextureBrowser *textureBrowser)
{
    if (event->direction == GDK_SCROLL_UP) {
        TextureBrowser_MouseWheel(*textureBrowser, true);
    } else if (event->direction == GDK_SCROLL_DOWN) {
        TextureBrowser_MouseWheel(*textureBrowser, false);
    }
    return FALSE;
}

void TextureBrowser_scrollChanged(void *data, gdouble value)
{
    //globalOutputStream() << "vertical scroll\n";
    TextureBrowser_setOriginY(*reinterpret_cast<TextureBrowser *>( data ), -(int) value);
}

static void TextureBrowser_verticalScroll(ui::Adjustment adjustment, TextureBrowser *textureBrowser)
{
    textureBrowser->m_scrollAdjustment.value_changed(gtk_adjustment_get_value(adjustment));
}

void TextureBrowser_updateScroll(TextureBrowser &textureBrowser)
{
    if (textureBrowser.m_showTextureScrollbar) {
        int totalHeight = TextureBrowser_TotalHeight(textureBrowser);

        totalHeight = std::max(totalHeight, textureBrowser.height);

        auto vadjustment = gtk_range_get_adjustment(GTK_RANGE(textureBrowser.m_texture_scroll));

        gtk_adjustment_set_value(vadjustment, -TextureBrowser_getOriginY(textureBrowser));
        gtk_adjustment_set_page_size(vadjustment, textureBrowser.height);
        gtk_adjustment_set_page_increment(vadjustment, textureBrowser.height / 2);
        gtk_adjustment_set_step_increment(vadjustment, 20);
        gtk_adjustment_set_lower(vadjustment, 0);
        gtk_adjustment_set_upper(vadjustment, totalHeight);

        g_signal_emit_by_name(G_OBJECT(vadjustment), "changed");
    }
}

gboolean TextureBrowser_size_allocate(ui::Widget widget, GtkAllocation *allocation, TextureBrowser *textureBrowser)
{
    textureBrowser->width = allocation->width;
    textureBrowser->height = allocation->height;
    TextureBrowser_heightChanged(*textureBrowser);
    textureBrowser->m_originInvalid = true;
    TextureBrowser_queueDraw(*textureBrowser);
    return FALSE;
}

gboolean TextureBrowser_expose(ui::Widget widget, GdkEventExpose *event, TextureBrowser *textureBrowser)
{
    if (glwidget_make_current(textureBrowser->m_gl_widget) != FALSE) {
        GlobalOpenGL_debugAssertNoErrors();
        TextureBrowser_evaluateHeight(*textureBrowser);
        Texture_Draw(*textureBrowser);
        GlobalOpenGL_debugAssertNoErrors();
        glwidget_swap_buffers(textureBrowser->m_gl_widget);
    }
    return FALSE;
}


TextureBrowser g_TextureBrowser;

TextureBrowser &GlobalTextureBrowser()
{
    return g_TextureBrowser;
}

bool TextureBrowser_hideUnused()
{
    return g_TextureBrowser.m_hideUnused;
}

void TextureBrowser_ToggleHideUnused()
{
    if (g_TextureBrowser.m_hideUnused) {
        TextureBrowser_SetHideUnused(g_TextureBrowser, false);
    } else {
        TextureBrowser_SetHideUnused(g_TextureBrowser, true);
    }
}

void TextureGroups_constructTreeModel(TextureGroups groups, ui::TreeStore store)
{
    // put the information from the old textures menu into a treeview
    GtkTreeIter iter, child;

    TextureGroups::const_iterator i = groups.begin();
    while (i != groups.end()) {
        const char *dirName = (*i).c_str();
        const char *firstUnderscore = strchr(dirName, '_');
        StringRange dirRoot(dirName, (firstUnderscore == 0) ? dirName : firstUnderscore + 1);

        TextureGroups::const_iterator next = i;
        ++next;
        if (firstUnderscore != 0
            && next != groups.end()
            && string_equal_start((*next).c_str(), dirRoot)) {
            gtk_tree_store_append(store, &iter, NULL);
            gtk_tree_store_set(store, &iter, 0, CopiedString(StringRange(dirName, firstUnderscore)).c_str(), -1);

            // keep going...
            while (i != groups.end() && string_equal_start((*i).c_str(), dirRoot)) {
                gtk_tree_store_append(store, &child, &iter);
                gtk_tree_store_set(store, &child, 0, (*i).c_str(), -1);
                ++i;
            }
        } else {
            gtk_tree_store_append(store, &iter, NULL);
            gtk_tree_store_set(store, &iter, 0, dirName, -1);
            ++i;
        }
    }
}

TextureGroups TextureGroups_constructTreeView()
{
    TextureGroups groups;

    if (TextureBrowser_showWads()) {
        GlobalFileSystem().forEachArchive(TextureGroupsAddWadCaller(groups));
    } else {
        // scan texture dirs and pak files only if not restricting to shaderlist
        if (g_pGameDescription->mGameType != "doom3" && !g_TextureBrowser_shaderlistOnly) {
            GlobalFileSystem().forEachDirectory("textures/", TextureGroupsAddDirectoryCaller(groups));
        }

        GlobalShaderSystem().foreachShaderName(TextureGroupsAddShaderCaller(groups));
    }

    return groups;
}

void TextureBrowser_constructTreeStore()
{
    TextureGroups groups = TextureGroups_constructTreeView();
    auto store = ui::TreeStore::from(gtk_tree_store_new(1, G_TYPE_STRING));
    TextureGroups_constructTreeModel(groups, store);

    gtk_tree_view_set_model(g_TextureBrowser.m_treeViewTree, store);

    g_object_unref(G_OBJECT(store));
}

void TextureBrowser_constructTreeStoreTags()
{
    TextureGroups groups;
    auto store = ui::TreeStore::from(gtk_tree_store_new(1, G_TYPE_STRING));
    auto model = g_TextureBrowser.m_all_tags_list;

    gtk_tree_view_set_model(g_TextureBrowser.m_treeViewTags, model);

    g_object_unref(G_OBJECT(store));
}

void TreeView_onRowActivated(ui::TreeView treeview, ui::TreePath path, ui::TreeViewColumn col, gpointer userdata)
{
    GtkTreeIter iter;

    auto model = gtk_tree_view_get_model(treeview);

    if (gtk_tree_model_get_iter(model, &iter, path)) {
        gchar dirName[1024];

        gchar *buffer;
        gtk_tree_model_get(model, &iter, 0, &buffer, -1);
        strcpy(dirName, buffer);
        g_free(buffer);

        g_TextureBrowser.m_searchedTags = false;

        if (!TextureBrowser_showWads()) {
            strcat(dirName, "/");
        }

        ScopeDisableScreenUpdates disableScreenUpdates(dirName, "Loading Textures");
        TextureBrowser_ShowDirectory(GlobalTextureBrowser(), dirName);
        TextureBrowser_queueDraw(GlobalTextureBrowser());
    }
}

void TextureBrowser_createTreeViewTree()
{
    gtk_tree_view_set_enable_search(g_TextureBrowser.m_treeViewTree, FALSE);

    gtk_tree_view_set_headers_visible(g_TextureBrowser.m_treeViewTree, FALSE);
    g_TextureBrowser.m_treeViewTree.connect("row-activated", (GCallback) TreeView_onRowActivated, NULL);

    auto renderer = ui::CellRendererText(ui::New);
    gtk_tree_view_insert_column_with_attributes(g_TextureBrowser.m_treeViewTree, -1, "", renderer, "text", 0, NULL);

    TextureBrowser_constructTreeStore();
}

void TextureBrowser_addTag();

void TextureBrowser_renameTag();

void TextureBrowser_deleteTag();

void TextureBrowser_createContextMenu(ui::Widget treeview, GdkEventButton *event)
{
    ui::Widget menu = ui::Menu(ui::New);

    ui::Widget menuitem = ui::MenuItem("Add tag");
    menuitem.connect("activate", (GCallback) TextureBrowser_addTag, treeview);
    gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);

    menuitem = ui::MenuItem("Rename tag");
    menuitem.connect("activate", (GCallback) TextureBrowser_renameTag, treeview);
    gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);

    menuitem = ui::MenuItem("Delete tag");
    menuitem.connect("activate", (GCallback) TextureBrowser_deleteTag, treeview);
    gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);

    gtk_widget_show_all(menu);

    gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL,
                   (event != NULL) ? event->button : 0,
                   gdk_event_get_time((GdkEvent *) event));
}

gboolean TreeViewTags_onButtonPressed(ui::TreeView treeview, GdkEventButton *event)
{
    if (event->type == GDK_BUTTON_PRESS && event->button == 3) {
        GtkTreePath *path;
        auto selection = gtk_tree_view_get_selection(treeview);

        if (gtk_tree_view_get_path_at_pos(treeview, event->x, event->y, &path, NULL, NULL, NULL)) {
            gtk_tree_selection_unselect_all(selection);
            gtk_tree_selection_select_path(selection, path);
            gtk_tree_path_free(path);
        }

        TextureBrowser_createContextMenu(treeview, event);
        return TRUE;
    }
    return FALSE;
}

void TextureBrowser_createTreeViewTags()
{
    g_TextureBrowser.m_treeViewTags = ui::TreeView(ui::New);
    gtk_tree_view_set_enable_search(g_TextureBrowser.m_treeViewTags, FALSE);

    g_TextureBrowser.m_treeViewTags.connect("button-press-event", (GCallback) TreeViewTags_onButtonPressed, NULL);

    gtk_tree_view_set_headers_visible(g_TextureBrowser.m_treeViewTags, FALSE);

    auto renderer = ui::CellRendererText(ui::New);
    gtk_tree_view_insert_column_with_attributes(g_TextureBrowser.m_treeViewTags, -1, "", renderer, "text", 0, NULL);

    TextureBrowser_constructTreeStoreTags();
}

ui::MenuItem TextureBrowser_constructViewMenu(ui::Menu menu)
{
    ui::MenuItem textures_menu_item = ui::MenuItem(new_sub_menu_item_with_mnemonic("_View"));

    if (g_Layout_enableDetachableMenus.m_value) {
        menu_tearoff(menu);
    }

    create_check_menu_item_with_mnemonic(menu, "Hide _Unused", "ShowInUse");
    if (string_empty(g_pGameDescription->getKeyValue("show_wads"))) {
        create_check_menu_item_with_mnemonic(menu, "Hide Image Missing", "FilterMissing");
    }

    // hide notex and shadernotex on texture browser: no one wants to apply them
    create_check_menu_item_with_mnemonic(menu, "Hide Fallback", "FilterFallback");

    menu_separator(menu);

    create_menu_item_with_mnemonic(menu, "Show All", "ShowAllTextures");

    // we always want to show shaders but don't want a "Show Shaders" menu for doom3 and .wad file games
    if (g_pGameDescription->mGameType == "doom3" || !string_empty(g_pGameDescription->getKeyValue("show_wads"))) {
        g_TextureBrowser.m_showShaders = true;
    } else {
        create_check_menu_item_with_mnemonic(menu, "Show shaders", "ToggleShowShaders");
    }

    if (g_pGameDescription->mGameType != "doom3" && string_empty(g_pGameDescription->getKeyValue("show_wads"))) {
        create_check_menu_item_with_mnemonic(menu, "Shaders Only", "ToggleShowShaderlistOnly");
    }
    if (g_TextureBrowser.m_tags) {
        create_menu_item_with_mnemonic(menu, "Show Untagged", "ShowUntagged");
    }

    menu_separator(menu);
    create_check_menu_item_with_mnemonic(menu, "Fixed Size", "FixedSize");
    create_check_menu_item_with_mnemonic(menu, "Transparency", "EnableAlpha");

    if (string_empty(g_pGameDescription->getKeyValue("show_wads"))) {
        menu_separator(menu);
        g_TextureBrowser.m_shader_info_item = ui::Widget(
                create_menu_item_with_mnemonic(menu, "Shader Info", "ShaderInfo"));
        gtk_widget_set_sensitive(g_TextureBrowser.m_shader_info_item, FALSE);
    }


    return textures_menu_item;
}

ui::MenuItem TextureBrowser_constructToolsMenu(ui::Menu menu)
{
    ui::MenuItem textures_menu_item = ui::MenuItem(new_sub_menu_item_with_mnemonic("_Tools"));

    if (g_Layout_enableDetachableMenus.m_value) {
        menu_tearoff(menu);
    }

    create_menu_item_with_mnemonic(menu, "Flush & Reload Shaders", "RefreshShaders");
    create_menu_item_with_mnemonic(menu, "Find / Replace...", "FindReplaceTextures");

    return textures_menu_item;
}

ui::MenuItem TextureBrowser_constructTagsMenu(ui::Menu menu)
{
    ui::MenuItem textures_menu_item = ui::MenuItem(new_sub_menu_item_with_mnemonic("T_ags"));

    if (g_Layout_enableDetachableMenus.m_value) {
        menu_tearoff(menu);
    }

    create_menu_item_with_mnemonic(menu, "Add tag", "AddTag");
    create_menu_item_with_mnemonic(menu, "Rename tag", "RenameTag");
    create_menu_item_with_mnemonic(menu, "Delete tag", "DeleteTag");
    menu_separator(menu);
    create_menu_item_with_mnemonic(menu, "Copy tags from selected", "CopyTag");
    create_menu_item_with_mnemonic(menu, "Paste tags to selected", "PasteTag");

    return textures_menu_item;
}

gboolean TextureBrowser_tagMoveHelper(ui::TreeModel model, ui::TreePath path, GtkTreeIter iter, GSList **selected)
{
    g_assert(selected != NULL);

    auto rowref = gtk_tree_row_reference_new(model, path);
    *selected = g_slist_append(*selected, rowref);

    return FALSE;
}

void TextureBrowser_assignTags()
{
    GSList *selected = NULL;
    GSList *node;
    gchar *tag_assigned;

    auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_available_tree);

    gtk_tree_selection_selected_foreach(selection, (GtkTreeSelectionForeachFunc) TextureBrowser_tagMoveHelper,
                                        &selected);

    if (selected != NULL) {
        for (node = selected; node != NULL; node = node->next) {
            auto path = gtk_tree_row_reference_get_path((GtkTreeRowReference *) node->data);

            if (path) {
                GtkTreeIter iter;

                if (gtk_tree_model_get_iter(g_TextureBrowser.m_available_store, &iter, path)) {
                    gtk_tree_model_get(g_TextureBrowser.m_available_store, &iter, TAG_COLUMN, &tag_assigned, -1);
                    if (!TagBuilder.CheckShaderTag(g_TextureBrowser.shader.c_str())) {
                        // create a custom shader/texture entry
                        IShader *ishader = QERApp_Shader_ForName(g_TextureBrowser.shader.c_str());
                        CopiedString filename = ishader->getShaderFileName();

                        if (filename.empty()) {
                            // it's a texture
                            TagBuilder.AddShaderNode(g_TextureBrowser.shader.c_str(), CUSTOM, TEXTURE);
                        } else {
                            // it's a shader
                            TagBuilder.AddShaderNode(g_TextureBrowser.shader.c_str(), CUSTOM, SHADER);
                        }
                        ishader->DecRef();
                    }
                    TagBuilder.AddShaderTag(g_TextureBrowser.shader.c_str(), (char *) tag_assigned, TAG);

                    gtk_list_store_remove(g_TextureBrowser.m_available_store, &iter);
                    g_TextureBrowser.m_assigned_store.append(TAG_COLUMN, tag_assigned);
                }
            }
        }

        g_slist_foreach(selected, (GFunc) gtk_tree_row_reference_free, NULL);

        // Save changes
        TagBuilder.SaveXmlDoc();
    }
    g_slist_free(selected);
}

void TextureBrowser_removeTags()
{
    GSList *selected = NULL;
    GSList *node;
    gchar *tag;

    auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_assigned_tree);

    gtk_tree_selection_selected_foreach(selection, (GtkTreeSelectionForeachFunc) TextureBrowser_tagMoveHelper,
                                        &selected);

    if (selected != NULL) {
        for (node = selected; node != NULL; node = node->next) {
            auto path = gtk_tree_row_reference_get_path((GtkTreeRowReference *) node->data);

            if (path) {
                GtkTreeIter iter;

                if (gtk_tree_model_get_iter(g_TextureBrowser.m_assigned_store, &iter, path)) {
                    gtk_tree_model_get(g_TextureBrowser.m_assigned_store, &iter, TAG_COLUMN, &tag, -1);
                    TagBuilder.DeleteShaderTag(g_TextureBrowser.shader.c_str(), tag);
                    gtk_list_store_remove(g_TextureBrowser.m_assigned_store, &iter);
                }
            }
        }

        g_slist_foreach(selected, (GFunc) gtk_tree_row_reference_free, NULL);

        // Update the "available tags list"
        BuildStoreAvailableTags(g_TextureBrowser.m_available_store, g_TextureBrowser.m_assigned_store,
                                g_TextureBrowser.m_all_tags, &g_TextureBrowser);

        // Save changes
        TagBuilder.SaveXmlDoc();
    }
    g_slist_free(selected);
}

void TextureBrowser_buildTagList()
{
    g_TextureBrowser.m_all_tags_list.clear();

    std::set<CopiedString>::iterator iter;

    for (iter = g_TextureBrowser.m_all_tags.begin(); iter != g_TextureBrowser.m_all_tags.end(); ++iter) {
        g_TextureBrowser.m_all_tags_list.append(TAG_COLUMN, (*iter).c_str());
    }
}

void TextureBrowser_searchTags()
{
    GSList *selected = NULL;
    GSList *node;
    gchar *tag;
    char buffer[256];
    char tags_searched[256];

    auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_treeViewTags);

    gtk_tree_selection_selected_foreach(selection, (GtkTreeSelectionForeachFunc) TextureBrowser_tagMoveHelper,
                                        &selected);

    if (selected != NULL) {
        strcpy(buffer, "/root/*/*[tag='");
        strcpy(tags_searched, "[TAGS] ");

        for (node = selected; node != NULL; node = node->next) {
            auto path = gtk_tree_row_reference_get_path((GtkTreeRowReference *) node->data);

            if (path) {
                GtkTreeIter iter;

                if (gtk_tree_model_get_iter(g_TextureBrowser.m_all_tags_list, &iter, path)) {
                    gtk_tree_model_get(g_TextureBrowser.m_all_tags_list, &iter, TAG_COLUMN, &tag, -1);

                    strcat(buffer, tag);
                    strcat(tags_searched, tag);
                    if (node != g_slist_last(node)) {
                        strcat(buffer, "' and tag='");
                        strcat(tags_searched, ", ");
                    }
                }
            }
        }

        strcat(buffer, "']");

        g_slist_foreach(selected, (GFunc) gtk_tree_row_reference_free, NULL);

        g_TextureBrowser.m_found_shaders.clear(); // delete old list
        TagBuilder.TagSearch(buffer, g_TextureBrowser.m_found_shaders);

        if (!g_TextureBrowser.m_found_shaders.empty()) { // found something
            size_t shaders_found = g_TextureBrowser.m_found_shaders.size();

            globalOutputStream() << "Found " << (unsigned int) shaders_found << " textures and shaders with "
                                 << tags_searched << "\n";
            ScopeDisableScreenUpdates disableScreenUpdates("Searching...", "Loading Textures");

            std::set<CopiedString>::iterator iter;

            for (iter = g_TextureBrowser.m_found_shaders.begin();
                 iter != g_TextureBrowser.m_found_shaders.end(); iter++) {
                std::string path = (*iter).c_str();
                size_t pos = path.find_last_of("/", path.size());
                std::string name = path.substr(pos + 1, path.size());
                path = path.substr(0, pos + 1);
                TextureDirectory_loadTexture(path.c_str(), name.c_str());
            }
        }
        g_TextureBrowser.m_searchedTags = true;
        g_TextureBrowser_currentDirectory = tags_searched;

        g_TextureBrowser.m_nTotalHeight = 0;
        TextureBrowser_setOriginY(g_TextureBrowser, 0);
        TextureBrowser_heightChanged(g_TextureBrowser);
        TextureBrowser_updateTitle();
    }
    g_slist_free(selected);
}

void TextureBrowser_toggleSearchButton()
{
    gint page = gtk_notebook_get_current_page(GTK_NOTEBOOK(g_TextureBrowser.m_tag_notebook));

    if (page == 0) { // tag page
        gtk_widget_show_all(g_TextureBrowser.m_search_button);
    } else {
        g_TextureBrowser.m_search_button.hide();
    }
}

void TextureBrowser_constructTagNotebook()
{
    g_TextureBrowser.m_tag_notebook = ui::Widget::from(gtk_notebook_new());
    ui::Widget labelTags = ui::Label("Tags");
    ui::Widget labelTextures = ui::Label("Textures");

    gtk_notebook_append_page(GTK_NOTEBOOK(g_TextureBrowser.m_tag_notebook), g_TextureBrowser.m_scr_win_tree,
                             labelTextures);
    gtk_notebook_append_page(GTK_NOTEBOOK(g_TextureBrowser.m_tag_notebook), g_TextureBrowser.m_scr_win_tags, labelTags);

    g_TextureBrowser.m_tag_notebook.connect("switch-page", G_CALLBACK(TextureBrowser_toggleSearchButton), NULL);

    gtk_widget_show_all(g_TextureBrowser.m_tag_notebook);
}

void TextureBrowser_constructSearchButton()
{
    auto image = ui::Widget::from(gtk_image_new_from_stock(GTK_STOCK_FIND, GTK_ICON_SIZE_SMALL_TOOLBAR));
    g_TextureBrowser.m_search_button = ui::Button(ui::New);
    g_TextureBrowser.m_search_button.connect("clicked", G_CALLBACK(TextureBrowser_searchTags), NULL);
    gtk_widget_set_tooltip_text(g_TextureBrowser.m_search_button, "Search with selected tags");
    g_TextureBrowser.m_search_button.add(image);
}

void TextureBrowser_checkTagFile()
{
    const char SHADERTAG_FILE[] = "shadertags.xml";
    CopiedString default_filename, rc_filename;
    StringOutputStream stream(256);

    stream << LocalRcPath_get();
    stream << SHADERTAG_FILE;
    rc_filename = stream.c_str();

    if (file_exists(rc_filename.c_str())) {
        g_TextureBrowser.m_tags = TagBuilder.OpenXmlDoc(rc_filename.c_str());

        if (g_TextureBrowser.m_tags) {
            globalOutputStream() << "Loading tag file " << rc_filename.c_str() << ".\n";
        }
    } else {
        // load default tagfile
        stream.clear();
        stream << g_pGameDescription->mGameToolsPath.c_str();
        stream << SHADERTAG_FILE;
        default_filename = stream.c_str();

        if (file_exists(default_filename.c_str())) {
            g_TextureBrowser.m_tags = TagBuilder.OpenXmlDoc(default_filename.c_str(), rc_filename.c_str());

            if (g_TextureBrowser.m_tags) {
                globalOutputStream() << "Loading default tag file " << default_filename.c_str() << ".\n";
            }
        } else {
            globalErrorStream() << "Unable to find default tag file " << default_filename.c_str()
                                << ". No tag support.\n";
        }
    }
}

void TextureBrowser_SetNotex()
{
    StringOutputStream name(256);
    name << GlobalRadiant().getAppPath() << "bitmaps/" NOTEX_BASENAME ".png";
    g_notex = name.c_str();

    name = StringOutputStream(256);
    name << GlobalRadiant().getAppPath() << "bitmaps/" SHADERNOTEX_BASENAME " .png";
    g_shadernotex = name.c_str();
}

ui::Widget TextureBrowser_constructWindow(ui::Window toplevel)
{
    // The gl_widget and the tag assignment frame should be packed into a GtkVPaned with the slider
    // position stored in local.pref. gtk_paned_get_position() and gtk_paned_set_position() don't
    // seem to work in gtk 2.4 and the arrow buttons don't handle GTK_FILL, so here's another thing
    // for the "once-the-gtk-libs-are-updated-TODO-list" :x

    TextureBrowser_checkTagFile();
    TextureBrowser_SetNotex();

    GlobalShaderSystem().setActiveShadersChangedNotify(
            ReferenceCaller<TextureBrowser, void(), TextureBrowser_activeShadersChanged>(g_TextureBrowser));

    g_TextureBrowser.m_parent = toplevel;

    auto table = ui::Table(3, 3, FALSE);
    auto vbox = ui::VBox(FALSE, 0);
    table.attach(vbox, {0, 1, 1, 3}, {GTK_FILL, GTK_FILL});
    vbox.show();

    ui::Widget menu_bar{ui::null};

    { // menu bar
        menu_bar = ui::Widget::from(gtk_menu_bar_new());
        auto menu_view = ui::Menu(ui::New);
        auto view_item = TextureBrowser_constructViewMenu(menu_view);
        gtk_menu_item_set_submenu(GTK_MENU_ITEM(view_item), menu_view);
        gtk_menu_shell_append(GTK_MENU_SHELL(menu_bar), view_item);

        auto menu_tools = ui::Menu(ui::New);
        auto tools_item = TextureBrowser_constructToolsMenu(menu_tools);
        gtk_menu_item_set_submenu(GTK_MENU_ITEM(tools_item), menu_tools);
        gtk_menu_shell_append(GTK_MENU_SHELL(menu_bar), tools_item);

        table.attach(menu_bar, {0, 3, 0, 1}, {GTK_FILL, GTK_SHRINK});
        menu_bar.show();
    }
    { // Texture TreeView
        g_TextureBrowser.m_scr_win_tree = ui::ScrolledWindow(ui::New);
        gtk_container_set_border_width(GTK_CONTAINER(g_TextureBrowser.m_scr_win_tree), 0);

        // vertical only scrolling for treeview
        gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(g_TextureBrowser.m_scr_win_tree), GTK_POLICY_NEVER,
                                       GTK_POLICY_ALWAYS);

        g_TextureBrowser.m_scr_win_tree.show();

        TextureBrowser_createTreeViewTree();

        gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(g_TextureBrowser.m_scr_win_tree),
                                              g_TextureBrowser.m_treeViewTree);
        g_TextureBrowser.m_treeViewTree.show();
    }
    { // gl_widget scrollbar
        auto w = ui::Widget::from(gtk_vscrollbar_new(ui::Adjustment(0, 0, 0, 1, 1, 0)));
        table.attach(w, {2, 3, 1, 2}, {GTK_SHRINK, GTK_FILL});
        w.show();
        g_TextureBrowser.m_texture_scroll = w;

        auto vadjustment = ui::Adjustment::from(gtk_range_get_adjustment(GTK_RANGE(g_TextureBrowser.m_texture_scroll)));
        vadjustment.connect("value_changed", G_CALLBACK(TextureBrowser_verticalScroll), &g_TextureBrowser);

        g_TextureBrowser.m_texture_scroll.visible(g_TextureBrowser.m_showTextureScrollbar);
    }
    { // gl_widget
        g_TextureBrowser.m_gl_widget = glwidget_new(FALSE);
        g_object_ref(g_TextureBrowser.m_gl_widget._handle);

        gtk_widget_set_events(g_TextureBrowser.m_gl_widget,
                              GDK_DESTROY | GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
                              GDK_POINTER_MOTION_MASK | GDK_SCROLL_MASK);
        gtk_widget_set_can_focus(g_TextureBrowser.m_gl_widget, true);

        table.attach(g_TextureBrowser.m_gl_widget, {1, 2, 1, 2});
        g_TextureBrowser.m_gl_widget.show();

        g_TextureBrowser.m_sizeHandler = g_TextureBrowser.m_gl_widget.connect("size_allocate",
                                                                              G_CALLBACK(TextureBrowser_size_allocate),
                                                                              &g_TextureBrowser);
        g_TextureBrowser.m_exposeHandler = g_TextureBrowser.m_gl_widget.on_render(G_CALLBACK(TextureBrowser_expose),
                                                                                  &g_TextureBrowser);

        g_TextureBrowser.m_gl_widget.connect("button_press_event", G_CALLBACK(TextureBrowser_button_press),
                                             &g_TextureBrowser);
        g_TextureBrowser.m_gl_widget.connect("button_release_event", G_CALLBACK(TextureBrowser_button_release),
                                             &g_TextureBrowser);
        g_TextureBrowser.m_gl_widget.connect("motion_notify_event", G_CALLBACK(TextureBrowser_motion),
                                             &g_TextureBrowser);
        g_TextureBrowser.m_gl_widget.connect("scroll_event", G_CALLBACK(TextureBrowser_scroll), &g_TextureBrowser);
    }

    // tag stuff
    if (g_TextureBrowser.m_tags) {
        { // fill tag GtkListStore
            g_TextureBrowser.m_all_tags_list = ui::ListStore::from(gtk_list_store_new(N_COLUMNS, G_TYPE_STRING));
            auto sortable = GTK_TREE_SORTABLE(g_TextureBrowser.m_all_tags_list);
            gtk_tree_sortable_set_sort_column_id(sortable, TAG_COLUMN, GTK_SORT_ASCENDING);

            TagBuilder.GetAllTags(g_TextureBrowser.m_all_tags);
            TextureBrowser_buildTagList();
        }
        { // tag menu bar
            auto menu_tags = ui::Menu(ui::New);
            auto tags_item = TextureBrowser_constructTagsMenu(menu_tags);
            gtk_menu_item_set_submenu(GTK_MENU_ITEM(tags_item), menu_tags);
            gtk_menu_shell_append(GTK_MENU_SHELL(menu_bar), tags_item);
        }
        { // Tag TreeView
            g_TextureBrowser.m_scr_win_tags = ui::ScrolledWindow(ui::New);
            gtk_container_set_border_width(GTK_CONTAINER(g_TextureBrowser.m_scr_win_tags), 0);

            // vertical only scrolling for treeview
            gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(g_TextureBrowser.m_scr_win_tags), GTK_POLICY_NEVER,
                                           GTK_POLICY_ALWAYS);

            TextureBrowser_createTreeViewTags();

            auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_treeViewTags);
            gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE);

            gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(g_TextureBrowser.m_scr_win_tags),
                                                  g_TextureBrowser.m_treeViewTags);
            g_TextureBrowser.m_treeViewTags.show();
        }
        { // Texture/Tag notebook
            TextureBrowser_constructTagNotebook();
            vbox.pack_start(g_TextureBrowser.m_tag_notebook, TRUE, TRUE, 0);
        }
        { // Tag search button
            TextureBrowser_constructSearchButton();
            vbox.pack_end(g_TextureBrowser.m_search_button, FALSE, FALSE, 0);
        }
        auto frame_table = ui::Table(3, 3, FALSE);
        { // Tag frame

            g_TextureBrowser.m_tag_frame = ui::Frame("Tag assignment");
            gtk_frame_set_label_align(GTK_FRAME(g_TextureBrowser.m_tag_frame), 0.5, 0.5);
            gtk_frame_set_shadow_type(GTK_FRAME(g_TextureBrowser.m_tag_frame), GTK_SHADOW_NONE);

            table.attach(g_TextureBrowser.m_tag_frame, {1, 3, 2, 3}, {GTK_FILL, GTK_SHRINK});

            frame_table.show();

            g_TextureBrowser.m_tag_frame.add(frame_table);
        }
        { // assigned tag list
            ui::Widget scrolled_win = ui::ScrolledWindow(ui::New);
            gtk_container_set_border_width(GTK_CONTAINER(scrolled_win), 0);
            gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_win), GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);

            g_TextureBrowser.m_assigned_store = ui::ListStore::from(gtk_list_store_new(N_COLUMNS, G_TYPE_STRING));

            auto sortable = GTK_TREE_SORTABLE(g_TextureBrowser.m_assigned_store);
            gtk_tree_sortable_set_sort_column_id(sortable, TAG_COLUMN, GTK_SORT_ASCENDING);

            auto renderer = ui::CellRendererText(ui::New);

            g_TextureBrowser.m_assigned_tree = ui::TreeView(
                    ui::TreeModel::from(g_TextureBrowser.m_assigned_store._handle));
            g_TextureBrowser.m_assigned_store.unref();
            g_TextureBrowser.m_assigned_tree.connect("row-activated", (GCallback) TextureBrowser_removeTags, NULL);
            gtk_tree_view_set_headers_visible(g_TextureBrowser.m_assigned_tree, FALSE);

            auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_assigned_tree);
            gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE);

            auto column = ui::TreeViewColumn("", renderer, {{"text", TAG_COLUMN}});
            gtk_tree_view_append_column(g_TextureBrowser.m_assigned_tree, column);
            g_TextureBrowser.m_assigned_tree.show();

            scrolled_win.show();
            gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scrolled_win), g_TextureBrowser.m_assigned_tree);

            frame_table.attach(scrolled_win, {0, 1, 1, 3}, {GTK_FILL, GTK_FILL});
        }
        { // available tag list
            ui::Widget scrolled_win = ui::ScrolledWindow(ui::New);
            gtk_container_set_border_width(GTK_CONTAINER(scrolled_win), 0);
            gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_win), GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);

            g_TextureBrowser.m_available_store = ui::ListStore::from(gtk_list_store_new(N_COLUMNS, G_TYPE_STRING));
            auto sortable = GTK_TREE_SORTABLE(g_TextureBrowser.m_available_store);
            gtk_tree_sortable_set_sort_column_id(sortable, TAG_COLUMN, GTK_SORT_ASCENDING);

            auto renderer = ui::CellRendererText(ui::New);

            g_TextureBrowser.m_available_tree = ui::TreeView(
                    ui::TreeModel::from(g_TextureBrowser.m_available_store._handle));
            g_TextureBrowser.m_available_store.unref();
            g_TextureBrowser.m_available_tree.connect("row-activated", (GCallback) TextureBrowser_assignTags, NULL);
            gtk_tree_view_set_headers_visible(g_TextureBrowser.m_available_tree, FALSE);

            auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_available_tree);
            gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE);

            auto column = ui::TreeViewColumn("", renderer, {{"text", TAG_COLUMN}});
            gtk_tree_view_append_column(g_TextureBrowser.m_available_tree, column);
            g_TextureBrowser.m_available_tree.show();

            scrolled_win.show();
            gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scrolled_win), g_TextureBrowser.m_available_tree);

            frame_table.attach(scrolled_win, {2, 3, 1, 3}, {GTK_FILL, GTK_FILL});
        }
        { // tag arrow buttons
            auto m_btn_left = ui::Button(ui::New);
            auto m_btn_right = ui::Button(ui::New);
            auto m_arrow_left = ui::Widget::from(gtk_arrow_new(GTK_ARROW_LEFT, GTK_SHADOW_OUT));
            auto m_arrow_right = ui::Widget::from(gtk_arrow_new(GTK_ARROW_RIGHT, GTK_SHADOW_OUT));
            m_btn_left.add(m_arrow_left);
            m_btn_right.add(m_arrow_right);

            // workaround. the size of the tag frame depends of the requested size of the arrow buttons.
            m_arrow_left.dimensions(-1, 68);
            m_arrow_right.dimensions(-1, 68);

            frame_table.attach(m_btn_left, {1, 2, 1, 2}, {GTK_SHRINK, GTK_EXPAND});
            frame_table.attach(m_btn_right, {1, 2, 2, 3}, {GTK_SHRINK, GTK_EXPAND});

            m_btn_left.connect("clicked", G_CALLBACK(TextureBrowser_assignTags), NULL);
            m_btn_right.connect("clicked", G_CALLBACK(TextureBrowser_removeTags), NULL);

            m_btn_left.show();
            m_btn_right.show();
            m_arrow_left.show();
            m_arrow_right.show();
        }
        { // tag fram labels
            ui::Widget m_lbl_assigned = ui::Label("Assigned");
            ui::Widget m_lbl_unassigned = ui::Label("Available");

            frame_table.attach(m_lbl_assigned, {0, 1, 0, 1}, {GTK_EXPAND, GTK_SHRINK});
            frame_table.attach(m_lbl_unassigned, {2, 3, 0, 1}, {GTK_EXPAND, GTK_SHRINK});

            m_lbl_assigned.show();
            m_lbl_unassigned.show();
        }
    } else { // no tag support, show the texture tree only
        vbox.pack_start(g_TextureBrowser.m_scr_win_tree, TRUE, TRUE, 0);
    }

    // TODO do we need this?
    //gtk_container_set_focus_chain(GTK_CONTAINER(hbox_table), NULL);

    return table;
}

void TextureBrowser_destroyWindow()
{
    GlobalShaderSystem().setActiveShadersChangedNotify(Callback<void()>());

    g_signal_handler_disconnect(G_OBJECT(g_TextureBrowser.m_gl_widget), g_TextureBrowser.m_sizeHandler);
    g_signal_handler_disconnect(G_OBJECT(g_TextureBrowser.m_gl_widget), g_TextureBrowser.m_exposeHandler);

    g_TextureBrowser.m_gl_widget.unref();
}

const Vector3 &TextureBrowser_getBackgroundColour(TextureBrowser &textureBrowser)
{
    return textureBrowser.color_textureback;
}

void TextureBrowser_setBackgroundColour(TextureBrowser &textureBrowser, const Vector3 &colour)
{
    textureBrowser.color_textureback = colour;
    TextureBrowser_queueDraw(textureBrowser);
}

void TextureBrowser_selectionHelper(ui::TreeModel model, ui::TreePath path, GtkTreeIter *iter, GSList **selected)
{
    g_assert(selected != NULL);

    gchar *name;
    gtk_tree_model_get(model, iter, TAG_COLUMN, &name, -1);
    *selected = g_slist_append(*selected, name);
}

void TextureBrowser_shaderInfo()
{
    const char *name = TextureBrowser_GetSelectedShader(g_TextureBrowser);
    IShader *shader = QERApp_Shader_ForName(name);

    DoShaderInfoDlg(name, shader->getShaderFileName(), "Shader Info");

    shader->DecRef();
}

void TextureBrowser_addTag()
{
    CopiedString tag;

    EMessageBoxReturn result = DoShaderTagDlg(&tag, "Add shader tag");

    if (result == eIDOK && !tag.empty()) {
        GtkTreeIter iter;
        g_TextureBrowser.m_all_tags.insert(tag.c_str());
        gtk_list_store_append(g_TextureBrowser.m_available_store, &iter);
        gtk_list_store_set(g_TextureBrowser.m_available_store, &iter, TAG_COLUMN, tag.c_str(), -1);

        // Select the currently added tag in the available list
        auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_available_tree);
        gtk_tree_selection_select_iter(selection, &iter);

        g_TextureBrowser.m_all_tags_list.append(TAG_COLUMN, tag.c_str());
    }
}

void TextureBrowser_renameTag()
{
    /* WORKAROUND: The tag treeview is set to GTK_SELECTION_MULTIPLE. Because
	   gtk_tree_selection_get_selected() doesn't work with GTK_SELECTION_MULTIPLE,
	   we need to count the number of selected rows first and use
	   gtk_tree_selection_selected_foreach() then to go through the list of selected
	   rows (which always containins a single row).
	 */

    GSList *selected = NULL;

    auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_treeViewTags);
    gtk_tree_selection_selected_foreach(selection, GtkTreeSelectionForeachFunc(TextureBrowser_selectionHelper),
                                        &selected);

    if (g_slist_length(selected) == 1) { // we only rename a single tag
        CopiedString newTag;
        EMessageBoxReturn result = DoShaderTagDlg(&newTag, "Rename shader tag");

        if (result == eIDOK && !newTag.empty()) {
            GtkTreeIter iterList;
            gchar *rowTag;
            gchar *oldTag = (char *) selected->data;

            bool row = gtk_tree_model_get_iter_first(g_TextureBrowser.m_all_tags_list, &iterList) != 0;

            while (row) {
                gtk_tree_model_get(g_TextureBrowser.m_all_tags_list, &iterList, TAG_COLUMN, &rowTag, -1);

                if (strcmp(rowTag, oldTag) == 0) {
                    gtk_list_store_set(g_TextureBrowser.m_all_tags_list, &iterList, TAG_COLUMN, newTag.c_str(), -1);
                }
                row = gtk_tree_model_iter_next(g_TextureBrowser.m_all_tags_list, &iterList) != 0;
            }

            TagBuilder.RenameShaderTag(oldTag, newTag.c_str());

            g_TextureBrowser.m_all_tags.erase((CopiedString) oldTag);
            g_TextureBrowser.m_all_tags.insert(newTag);

            BuildStoreAssignedTags(g_TextureBrowser.m_assigned_store, g_TextureBrowser.shader.c_str(),
                                   &g_TextureBrowser);
            BuildStoreAvailableTags(g_TextureBrowser.m_available_store, g_TextureBrowser.m_assigned_store,
                                    g_TextureBrowser.m_all_tags, &g_TextureBrowser);
        }
    } else {
        ui::alert(g_TextureBrowser.m_parent, "Select a single tag for renaming.");
    }
}

void TextureBrowser_deleteTag()
{
    GSList *selected = NULL;

    auto selection = gtk_tree_view_get_selection(g_TextureBrowser.m_treeViewTags);
    gtk_tree_selection_selected_foreach(selection, GtkTreeSelectionForeachFunc(TextureBrowser_selectionHelper),
                                        &selected);

    if (g_slist_length(selected) == 1) { // we only delete a single tag
        auto result = ui::alert(g_TextureBrowser.m_parent, "Are you sure you want to delete the selected tag?",
                                "Delete Tag", ui::alert_type::YESNO, ui::alert_icon::Question);

        if (result == ui::alert_response::YES) {
            GtkTreeIter iterSelected;
            gchar *rowTag;

            gchar *tagSelected = (char *) selected->data;

            bool row = gtk_tree_model_get_iter_first(g_TextureBrowser.m_all_tags_list, &iterSelected) != 0;

            while (row) {
                gtk_tree_model_get(g_TextureBrowser.m_all_tags_list, &iterSelected, TAG_COLUMN, &rowTag, -1);

                if (strcmp(rowTag, tagSelected) == 0) {
                    gtk_list_store_remove(g_TextureBrowser.m_all_tags_list, &iterSelected);
                    break;
                }
                row = gtk_tree_model_iter_next(g_TextureBrowser.m_all_tags_list, &iterSelected) != 0;
            }

            TagBuilder.DeleteTag(tagSelected);
            g_TextureBrowser.m_all_tags.erase((CopiedString) tagSelected);

            BuildStoreAssignedTags(g_TextureBrowser.m_assigned_store, g_TextureBrowser.shader.c_str(),
                                   &g_TextureBrowser);
            BuildStoreAvailableTags(g_TextureBrowser.m_available_store, g_TextureBrowser.m_assigned_store,
                                    g_TextureBrowser.m_all_tags, &g_TextureBrowser);
        }
    } else {
        ui::alert(g_TextureBrowser.m_parent, "Select a single tag for deletion.");
    }
}

void TextureBrowser_copyTag()
{
    g_TextureBrowser.m_copied_tags.clear();
    TagBuilder.GetShaderTags(g_TextureBrowser.shader.c_str(), g_TextureBrowser.m_copied_tags);
}

void TextureBrowser_pasteTag()
{
    IShader *ishader = QERApp_Shader_ForName(g_TextureBrowser.shader.c_str());
    CopiedString shader = g_TextureBrowser.shader.c_str();

    if (!TagBuilder.CheckShaderTag(shader.c_str())) {
        CopiedString shaderFile = ishader->getShaderFileName();
        if (shaderFile.empty()) {
            // it's a texture
            TagBuilder.AddShaderNode(shader.c_str(), CUSTOM, TEXTURE);
        } else {
            // it's a shader
            TagBuilder.AddShaderNode(shader.c_str(), CUSTOM, SHADER);
        }

        for (size_t i = 0; i < g_TextureBrowser.m_copied_tags.size(); ++i) {
            TagBuilder.AddShaderTag(shader.c_str(), g_TextureBrowser.m_copied_tags[i].c_str(), TAG);
        }
    } else {
        for (size_t i = 0; i < g_TextureBrowser.m_copied_tags.size(); ++i) {
            if (!TagBuilder.CheckShaderTag(shader.c_str(), g_TextureBrowser.m_copied_tags[i].c_str())) {
                // the tag doesn't exist - let's add it
                TagBuilder.AddShaderTag(shader.c_str(), g_TextureBrowser.m_copied_tags[i].c_str(), TAG);
            }
        }
    }

    ishader->DecRef();

    TagBuilder.SaveXmlDoc();
    BuildStoreAssignedTags(g_TextureBrowser.m_assigned_store, shader.c_str(), &g_TextureBrowser);
    BuildStoreAvailableTags(g_TextureBrowser.m_available_store, g_TextureBrowser.m_assigned_store,
                            g_TextureBrowser.m_all_tags, &g_TextureBrowser);
}

void TextureBrowser_RefreshShaders()
{
    ScopeDisableScreenUpdates disableScreenUpdates("Processing...", "Loading Shaders");
    GlobalShaderSystem().refresh();
    UpdateAllWindows();
    auto selection = gtk_tree_view_get_selection(GlobalTextureBrowser().m_treeViewTree);
    GtkTreeModel *model = NULL;
    GtkTreeIter iter;
    if (gtk_tree_selection_get_selected(selection, &model, &iter)) {
        gchar dirName[1024];

        gchar *buffer;
        gtk_tree_model_get(model, &iter, 0, &buffer, -1);
        strcpy(dirName, buffer);
        g_free(buffer);
        if (!TextureBrowser_showWads()) {
            strcat(dirName, "/");
        }
        TextureBrowser_ShowDirectory(GlobalTextureBrowser(), dirName);
        TextureBrowser_queueDraw(GlobalTextureBrowser());
    }
}

void TextureBrowser_ToggleShowShaders()
{
    g_TextureBrowser.m_showShaders ^= 1;
    g_TextureBrowser.m_showshaders_item.update();
    TextureBrowser_queueDraw(g_TextureBrowser);
}

void TextureBrowser_ToggleShowShaderListOnly()
{
    g_TextureBrowser_shaderlistOnly ^= 1;
    g_TextureBrowser.m_showshaderlistonly_item.update();

    TextureBrowser_constructTreeStore();
}

void TextureBrowser_showAll()
{
    g_TextureBrowser_currentDirectory = "";
    g_TextureBrowser.m_searchedTags = false;
    TextureBrowser_heightChanged(g_TextureBrowser);
    TextureBrowser_updateTitle();
}

void TextureBrowser_showUntagged()
{
    auto result = ui::alert(g_TextureBrowser.m_parent,
                            "WARNING! This function might need a lot of memory and time. Are you sure you want to use it?",
                            "Show Untagged", ui::alert_type::YESNO, ui::alert_icon::Warning);

    if (result == ui::alert_response::YES) {
        g_TextureBrowser.m_found_shaders.clear();
        TagBuilder.GetUntagged(g_TextureBrowser.m_found_shaders);
        std::set<CopiedString>::iterator iter;

        ScopeDisableScreenUpdates disableScreenUpdates("Searching untagged textures...", "Loading Textures");

        for (iter = g_TextureBrowser.m_found_shaders.begin(); iter != g_TextureBrowser.m_found_shaders.end(); iter++) {
            std::string path = (*iter).c_str();
            size_t pos = path.find_last_of("/", path.size());
            std::string name = path.substr(pos + 1, path.size());
            path = path.substr(0, pos + 1);
            TextureDirectory_loadTexture(path.c_str(), name.c_str());
            globalErrorStream() << path.c_str() << name.c_str() << "\n";
        }

        g_TextureBrowser_currentDirectory = "Untagged";
        TextureBrowser_queueDraw(GlobalTextureBrowser());
        TextureBrowser_heightChanged(g_TextureBrowser);
        TextureBrowser_updateTitle();
    }
}

void TextureBrowser_FixedSize()
{
    g_TextureBrowser_fixedSize ^= 1;
    GlobalTextureBrowser().m_fixedsize_item.update();
    TextureBrowser_activeShadersChanged(GlobalTextureBrowser());
}

void TextureBrowser_FilterMissing()
{
    g_TextureBrowser_filterMissing ^= 1;
    GlobalTextureBrowser().m_filternotex_item.update();
    TextureBrowser_activeShadersChanged(GlobalTextureBrowser());
    TextureBrowser_RefreshShaders();
}

void TextureBrowser_FilterFallback()
{
    g_TextureBrowser_filterFallback ^= 1;
    GlobalTextureBrowser().m_hidenotex_item.update();
    TextureBrowser_activeShadersChanged(GlobalTextureBrowser());
    TextureBrowser_RefreshShaders();
}

void TextureBrowser_EnableAlpha()
{
    g_TextureBrowser_enableAlpha ^= 1;
    GlobalTextureBrowser().m_enablealpha_item.update();
    TextureBrowser_activeShadersChanged(GlobalTextureBrowser());
}

void TextureBrowser_exportTitle(const Callback<void(const char *)> &importer)
{
    StringOutputStream buffer(64);
    buffer << "Textures: ";
    if (!string_empty(g_TextureBrowser_currentDirectory.c_str())) {
        buffer << g_TextureBrowser_currentDirectory.c_str();
    } else {
        buffer << "all";
    }
    importer(buffer.c_str());
}

struct TextureScale {
    static void Export(const TextureBrowser &self, const Callback<void(int)> &returnz)
    {
        switch (self.m_textureScale) {
            case 10:
                returnz(0);
                break;
            case 25:
                returnz(1);
                break;
            case 50:
                returnz(2);
                break;
            case 100:
                returnz(3);
                break;
            case 200:
                returnz(4);
                break;
        }
    }

    static void Import(TextureBrowser &self, int value)
    {
        switch (value) {
            case 0:
                TextureBrowser_setScale(self, 10);
                break;
            case 1:
                TextureBrowser_setScale(self, 25);
                break;
            case 2:
                TextureBrowser_setScale(self, 50);
                break;
            case 3:
                TextureBrowser_setScale(self, 100);
                break;
            case 4:
                TextureBrowser_setScale(self, 200);
                break;
        }
    }
};

struct UniformTextureSize {
    static void Export(const TextureBrowser &self, const Callback<void(int)> &returnz)
    {
        returnz(g_TextureBrowser.m_uniformTextureSize);
    }

    static void Import(TextureBrowser &self, int value)
    {
        if (value > 16) {
            TextureBrowser_setUniformSize(self, value);
        }
    }
};

void TextureBrowser_constructPreferences(PreferencesPage &page)
{
    page.appendCheckBox(
            "", "Texture scrollbar",
            make_property<TextureBrowser_ShowScrollbar>(GlobalTextureBrowser())
    );
    {
        const char *texture_scale[] = {"10%", "25%", "50%", "100%", "200%"};
        page.appendCombo(
                "Texture Thumbnail Scale",
                STRING_ARRAY_RANGE(texture_scale),
                make_property<TextureScale>(GlobalTextureBrowser())
        );
    }
    page.appendSpinner(
            "Texture Thumbnail Size",
            GlobalTextureBrowser().m_uniformTextureSize,
            GlobalTextureBrowser().m_uniformTextureSize,
            16, 8192
    );
    page.appendEntry("Mousewheel Increment", GlobalTextureBrowser().m_mouseWheelScrollIncrement);
    {
        const char *startup_shaders[] = {"None", TextureBrowser_getComonShadersName()};
        page.appendCombo("Load Shaders at Startup", reinterpret_cast<int &>( GlobalTextureBrowser().m_startupShaders ),
                         STRING_ARRAY_RANGE(startup_shaders));
    }
}

void TextureBrowser_constructPage(PreferenceGroup &group)
{
    PreferencesPage page(group.createPage("Texture Browser", "Texture Browser Preferences"));
    TextureBrowser_constructPreferences(page);
}

void TextureBrowser_registerPreferencesPage()
{
    PreferencesDialog_addSettingsPage(makeCallbackF(TextureBrowser_constructPage));
}


#include "preferencesystem.h"
#include "stringio.h"


void TextureClipboard_textureSelected(const char *shader);

void TextureBrowser_Construct()
{
    GlobalCommands_insert("ShaderInfo", makeCallbackF(TextureBrowser_shaderInfo));
    GlobalCommands_insert("ShowUntagged", makeCallbackF(TextureBrowser_showUntagged));
    GlobalCommands_insert("AddTag", makeCallbackF(TextureBrowser_addTag));
    GlobalCommands_insert("RenameTag", makeCallbackF(TextureBrowser_renameTag));
    GlobalCommands_insert("DeleteTag", makeCallbackF(TextureBrowser_deleteTag));
    GlobalCommands_insert("CopyTag", makeCallbackF(TextureBrowser_copyTag));
    GlobalCommands_insert("PasteTag", makeCallbackF(TextureBrowser_pasteTag));
    GlobalCommands_insert("RefreshShaders", makeCallbackF(VFS_Refresh));
    GlobalToggles_insert("ShowInUse", makeCallbackF(TextureBrowser_ToggleHideUnused),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_hideunused_item), Accelerator('U'));
    GlobalCommands_insert("ShowAllTextures", makeCallbackF(TextureBrowser_showAll),
                          Accelerator('A', (GdkModifierType) GDK_CONTROL_MASK));
    GlobalCommands_insert("ToggleTextures", makeCallbackF(TextureBrowser_toggleShow), Accelerator('T'));
    GlobalToggles_insert("ToggleShowShaders", makeCallbackF(TextureBrowser_ToggleShowShaders),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_showshaders_item));
    GlobalToggles_insert("ToggleShowShaderlistOnly", makeCallbackF(TextureBrowser_ToggleShowShaderListOnly),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_showshaderlistonly_item));
    GlobalToggles_insert("FixedSize", makeCallbackF(TextureBrowser_FixedSize),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_fixedsize_item));
    GlobalToggles_insert("FilterMissing", makeCallbackF(TextureBrowser_FilterMissing),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_filternotex_item));
    GlobalToggles_insert("FilterFallback", makeCallbackF(TextureBrowser_FilterFallback),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_hidenotex_item));
    GlobalToggles_insert("EnableAlpha", makeCallbackF(TextureBrowser_EnableAlpha),
                         ToggleItem::AddCallbackCaller(g_TextureBrowser.m_enablealpha_item));

    GlobalPreferenceSystem().registerPreference("TextureScale", make_property_string<TextureScale>(g_TextureBrowser));
    GlobalPreferenceSystem().registerPreference("UniformTextureSize",
                                                make_property_string<UniformTextureSize>(g_TextureBrowser));
    GlobalPreferenceSystem().registerPreference("TextureScrollbar", make_property_string<TextureBrowser_ShowScrollbar>(
            GlobalTextureBrowser()));
    GlobalPreferenceSystem().registerPreference("ShowShaders",
                                                make_property_string(GlobalTextureBrowser().m_showShaders));
    GlobalPreferenceSystem().registerPreference("ShowShaderlistOnly",
                                                make_property_string(g_TextureBrowser_shaderlistOnly));
    GlobalPreferenceSystem().registerPreference("FixedSize", make_property_string(g_TextureBrowser_fixedSize));
    GlobalPreferenceSystem().registerPreference("FilterMissing", make_property_string(g_TextureBrowser_filterMissing));
    GlobalPreferenceSystem().registerPreference("EnableAlpha", make_property_string(g_TextureBrowser_enableAlpha));
    GlobalPreferenceSystem().registerPreference("LoadShaders", make_property_string(
            reinterpret_cast<int &>( GlobalTextureBrowser().m_startupShaders )));
    GlobalPreferenceSystem().registerPreference("WheelMouseInc", make_property_string(
            GlobalTextureBrowser().m_mouseWheelScrollIncrement));
    GlobalPreferenceSystem().registerPreference("SI_Colors0",
                                                make_property_string(GlobalTextureBrowser().color_textureback));

    g_TextureBrowser.shader = texdef_name_default();

    Textures_setModeChangedNotify(ReferenceCaller<TextureBrowser, void(), TextureBrowser_queueDraw>(g_TextureBrowser));

    TextureBrowser_registerPreferencesPage();

    GlobalShaderSystem().attach(g_ShadersObserver);

    TextureBrowser_textureSelected = TextureClipboard_textureSelected;
}

void TextureBrowser_Destroy()
{
    GlobalShaderSystem().detach(g_ShadersObserver);

    Textures_setModeChangedNotify(Callback<void()>());
}