libs/gtkutil/cursor.cpp

   1 /*
   2    Copyright (C) 2001-2006, William Joseph.
   3    All Rights Reserved.
   4
   5    This file is part of GtkRadiant.
   6
   7    GtkRadiant is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    GtkRadiant is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GtkRadiant; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include "cursor.h"
  23
  24 #include "stream/textstream.h"
  25
  26 #include <string.h>
  27 #include <gdk/gdk.h>
  28 #include <gtk/gtk.h>
  29
  30
  31 GdkCursor* create_blank_cursor(){
  32         return gdk_cursor_new(GDK_BLANK_CURSOR);
  33 }
  34
  35 void blank_cursor( ui::Widget widget ){
  36         GdkCursor* cursor = create_blank_cursor();
  37         gdk_window_set_cursor( gtk_widget_get_window(widget), cursor );
  38         gdk_cursor_unref( cursor );
  39 }
  40
  41 void default_cursor( ui::Widget widget ){
  42         gdk_window_set_cursor( gtk_widget_get_window(widget), 0 );
  43 }
  44
  45
  46 void Sys_GetCursorPos( ui::Window window, int *x, int *y ){
  47         gdk_display_get_pointer( gdk_display_get_default(), 0, x, y, 0 );
  48 }
  49
  50 void Sys_SetCursorPos( ui::Window window, int x, int y ){
  51         GdkScreen *screen;
  52         gdk_display_get_pointer( gdk_display_get_default(), &screen, 0, 0, 0 );
  53         gdk_display_warp_pointer( gdk_display_get_default(), screen, x, y );
  54 }
  55
  56 gboolean DeferredMotion::gtk_motion(ui::Widget widget, GdkEventMotion *event, DeferredMotion *self)
  57 {
  58     self->motion( event->x, event->y, event->state );
  59     return FALSE;
  60 }
  61
  62 gboolean FreezePointer::motion_delta(ui::Widget widget, GdkEventMotion *event, FreezePointer *self)
  63 {
  64         int current_x, current_y;
  65         Sys_GetCursorPos( ui::Window(GTK_WINDOW( widget )), &current_x, &current_y );
  66         int dx = current_x - self->last_x;
  67         int dy = current_y - self->last_y;
  68         int ddx = current_x - self->recorded_x;
  69         int ddy = current_y - self->recorded_y;
  70         self->last_x = current_x;
  71         self->last_y = current_y;
  72         if ( dx != 0 || dy != 0 ) {
  73                 //globalOutputStream() << "motion x: " << dx << ", y: " << dy << "\n";
  74                 if (ddx < -32 || ddx > 32 || ddy < -32 || ddy > 32) {
  75                         Sys_SetCursorPos( ui::Window(GTK_WINDOW( widget )), self->recorded_x, self->recorded_y );
  76                         self->last_x = self->recorded_x;
  77                         self->last_y = self->recorded_y;
  78                 }
  79                 self->m_function( dx, dy, event->state, self->m_data );
  80         }
  81         return FALSE;
  82 }
  83
  84 void FreezePointer::freeze_pointer(ui::Window window, FreezePointer::MotionDeltaFunction function, void *data)
  85 {
  86         ASSERT_MESSAGE( m_function == 0, "can't freeze pointer" );
  87
  88         const GdkEventMask mask = static_cast<GdkEventMask>( GDK_POINTER_MOTION_MASK
  89                                                                                                                  | GDK_POINTER_MOTION_HINT_MASK
  90                                                                                                                  | GDK_BUTTON_MOTION_MASK
  91                                                                                                                  | GDK_BUTTON1_MOTION_MASK
  92                                                                                                                  | GDK_BUTTON2_MOTION_MASK
  93                                                                                                                  | GDK_BUTTON3_MOTION_MASK
  94                                                                                                                  | GDK_BUTTON_PRESS_MASK
  95                                                                                                                  | GDK_BUTTON_RELEASE_MASK
  96                                                                                                                  | GDK_VISIBILITY_NOTIFY_MASK );
  97
  98         GdkCursor* cursor = create_blank_cursor();
  99         //GdkGrabStatus status =
 100         gdk_pointer_grab( gtk_widget_get_window(GTK_WIDGET(window)), TRUE, mask, 0, cursor, GDK_CURRENT_TIME );
 101         gdk_cursor_unref( cursor );
 102
 103         Sys_GetCursorPos( window, &recorded_x, &recorded_y );
 104
 105         Sys_SetCursorPos( window, recorded_x, recorded_y );
 106
 107         last_x = recorded_x;
 108         last_y = recorded_y;
 109
 110         m_function = function;
 111         m_data = data;
 112
 113         handle_motion = window.connect( "motion_notify_event", G_CALLBACK( motion_delta ), this );
 114 }
 115
 116 void FreezePointer::unfreeze_pointer(ui::Window window)
 117 {
 118         g_signal_handler_disconnect( G_OBJECT( window ), handle_motion );
 119
 120         m_function = 0;
 121         m_data = 0;
 122
 123         Sys_SetCursorPos( window, recorded_x, recorded_y );
 124
 125         gdk_pointer_ungrab( GDK_CURRENT_TIME );
 126 }