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 {
  33     return gdk_cursor_new(GDK_BLANK_CURSOR);
  34 }
  35
  36 void blank_cursor(ui::Widget widget)
  37 {
  38     GdkCursor *cursor = create_blank_cursor();
  39     gdk_window_set_cursor(gtk_widget_get_window(widget), cursor);
  40     gdk_cursor_unref(cursor);
  41 }
  42
  43 void default_cursor(ui::Widget widget)
  44 {
  45     gdk_window_set_cursor(gtk_widget_get_window(widget), 0);
  46 }
  47
  48
  49 void Sys_GetCursorPos(ui::Window window, int *x, int *y)
  50 {
  51     gdk_display_get_pointer(gdk_display_get_default(), 0, x, y, 0);
  52 }
  53
  54 void Sys_SetCursorPos(ui::Window window, int x, int y)
  55 {
  56     GdkScreen *screen;
  57     gdk_display_get_pointer(gdk_display_get_default(), &screen, 0, 0, 0);
  58     gdk_display_warp_pointer(gdk_display_get_default(), screen, x, y);
  59 }
  60
  61 gboolean DeferredMotion::gtk_motion(ui::Widget widget, GdkEventMotion *event, DeferredMotion *self)
  62 {
  63     self->motion(event->x, event->y, event->state);
  64     return FALSE;
  65 }
  66
  67 gboolean FreezePointer::motion_delta(ui::Window widget, GdkEventMotion *event, FreezePointer *self)
  68 {
  69     int current_x, current_y;
  70     Sys_GetCursorPos(widget, &current_x, &current_y);
  71     int dx = current_x - self->last_x;
  72     int dy = current_y - self->last_y;
  73     int ddx = current_x - self->recorded_x;
  74     int ddy = current_y - self->recorded_y;
  75     self->last_x = current_x;
  76     self->last_y = current_y;
  77     if (dx != 0 || dy != 0) {
  78         //globalOutputStream() << "motion x: " << dx << ", y: " << dy << "\n";
  79         if (ddx < -32 || ddx > 32 || ddy < -32 || ddy > 32) {
  80             Sys_SetCursorPos(widget, self->recorded_x, self->recorded_y);
  81             self->last_x = self->recorded_x;
  82             self->last_y = self->recorded_y;
  83         }
  84         self->m_function(dx, dy, event->state, self->m_data);
  85     }
  86     return FALSE;
  87 }
  88
  89 void FreezePointer::freeze_pointer(ui::Window window, FreezePointer::MotionDeltaFunction function, void *data)
  90 {
  91     ASSERT_MESSAGE(m_function == 0, "can't freeze pointer");
  92
  93     const GdkEventMask mask = static_cast<GdkEventMask>( GDK_POINTER_MOTION_MASK
  94                                                          | GDK_POINTER_MOTION_HINT_MASK
  95                                                          | GDK_BUTTON_MOTION_MASK
  96                                                          | GDK_BUTTON1_MOTION_MASK
  97                                                          | GDK_BUTTON2_MOTION_MASK
  98                                                          | GDK_BUTTON3_MOTION_MASK
  99                                                          | GDK_BUTTON_PRESS_MASK
 100                                                          | GDK_BUTTON_RELEASE_MASK
 101                                                          | GDK_VISIBILITY_NOTIFY_MASK );
 102
 103     GdkCursor *cursor = create_blank_cursor();
 104     //GdkGrabStatus status =
 105     gdk_pointer_grab(gtk_widget_get_window(window), TRUE, mask, 0, cursor, GDK_CURRENT_TIME);
 106     gdk_cursor_unref(cursor);
 107
 108     Sys_GetCursorPos(window, &recorded_x, &recorded_y);
 109
 110     Sys_SetCursorPos(window, recorded_x, recorded_y);
 111
 112     last_x = recorded_x;
 113     last_y = recorded_y;
 114
 115     m_function = function;
 116     m_data = data;
 117
 118     handle_motion = window.connect("motion_notify_event", G_CALLBACK(motion_delta), this);
 119 }
 120
 121 void FreezePointer::unfreeze_pointer(ui::Window window)
 122 {
 123     g_signal_handler_disconnect(G_OBJECT(window), handle_motion);
 124
 125     m_function = 0;
 126     m_data = 0;
 127
 128     Sys_SetCursorPos(window, recorded_x, recorded_y);
 129
 130     gdk_pointer_ungrab(GDK_CURRENT_TIME);
 131 }