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 GdkCursor* create_blank_cursor(){
  31         return gdk_cursor_new( GDK_BLANK_CURSOR );
  32 }
  33
  34 void set_cursor( ui::Widget widget, GdkCursorType cursor_type ){
  35         GdkCursor* cursor = gdk_cursor_new( cursor_type );
  36         gdk_window_set_cursor( gtk_widget_get_window( widget ), cursor );
  37         gdk_cursor_unref( cursor );
  38 }
  39
  40 void blank_cursor( ui::Widget widget ){
  41         set_cursor( widget, GDK_BLANK_CURSOR );
  42 }
  43
  44 void default_cursor( ui::Widget widget ){
  45         gdk_window_set_cursor( gtk_widget_get_window( widget ), NULL );
  46 }
  47
  48 void Sys_GetCursorPos( ui::Widget widget, int *x, int *y ){
  49         GdkDisplay *display = gtk_widget_get_display( GTK_WIDGET( widget ) );
  50         // No need to store the screen, it will be recovered from widget again.
  51         gdk_display_get_pointer( display, NULL, x, y, NULL );
  52 }
  53
  54 void Sys_SetCursorPos( ui::Widget widget, int x, int y ){
  55         GdkDisplay *display = gtk_widget_get_display( GTK_WIDGET( widget ) );
  56         GdkScreen *screen = gtk_widget_get_screen( GTK_WIDGET( widget ) );
  57         gdk_display_warp_pointer( display, screen, x, y );
  58 }
  59
  60 gboolean DeferredMotion::gtk_motion(ui::Widget widget, GdkEventMotion *event, DeferredMotion *self)
  61 {
  62     self->motion( event->x, event->y, event->state );
  63     return FALSE;
  64 }
  65
  66 gboolean FreezePointer::motion_delta(ui::Widget widget, GdkEventMotion *event, FreezePointer *self)
  67 {
  68         int current_x, current_y;
  69         Sys_GetCursorPos( widget, &current_x, &current_y );
  70         int dx = current_x - self->last_x;
  71         int dy = current_y - self->last_y;
  72         self->last_x = current_x;
  73         self->last_y = current_y;
  74         if ( dx != 0 || dy != 0 ) {
  75                 //globalOutputStream() << "motion x: " << dx << ", y: " << dy << "\n";
  76                 int ddx = current_x - self->recorded_x;
  77                 int ddy = current_y - self->recorded_y;
  78                 if (ddx < -32 || ddx > 32 || ddy < -32 || ddy > 32) {
  79                         Sys_SetCursorPos( widget, self->recorded_x, self->recorded_y );
  80                         self->last_x = self->recorded_x;
  81                         self->last_y = self->recorded_y;
  82                 }
  83                 self->m_function( dx, dy, event->state, self->m_data );
  84         }
  85         return FALSE;
  86 }
  87
  88 void FreezePointer::freeze_pointer(ui::Widget widget, FreezePointer::MotionDeltaFunction function, void *data)
  89 {
  90         ASSERT_MESSAGE( m_function == 0, "can't freeze pointer" );
  91
  92         const GdkEventMask mask = static_cast<GdkEventMask>( GDK_POINTER_MOTION_MASK
  93                                                                                                                  | GDK_POINTER_MOTION_HINT_MASK
  94                                                                                                                  | GDK_BUTTON_MOTION_MASK
  95                                                                                                                  | GDK_BUTTON1_MOTION_MASK
  96                                                                                                                  | GDK_BUTTON2_MOTION_MASK
  97                                                                                                                  | GDK_BUTTON3_MOTION_MASK
  98                                                                                                                  | GDK_BUTTON_PRESS_MASK
  99                                                                                                                  | GDK_BUTTON_RELEASE_MASK
 100                                                                                                                  | GDK_VISIBILITY_NOTIFY_MASK );
 101
 102         GdkCursor* cursor = create_blank_cursor();
 103         //GdkGrabStatus status =
 104         gdk_pointer_grab( gtk_widget_get_window( widget ), TRUE, mask, 0, cursor, GDK_CURRENT_TIME );
 105         gdk_cursor_unref( cursor );
 106
 107         Sys_GetCursorPos( widget, &recorded_x, &recorded_y );
 108
 109         Sys_SetCursorPos( widget, recorded_x, recorded_y );
 110
 111         last_x = recorded_x;
 112         last_y = recorded_y;
 113
 114         m_function = function;
 115         m_data = data;
 116
 117         handle_motion = widget.connect( "motion_notify_event", G_CALLBACK( motion_delta ), this );
 118 }
 119
 120 void FreezePointer::unfreeze_pointer(ui::Widget widget)
 121 {
 122         g_signal_handler_disconnect( G_OBJECT( widget ), handle_motion );
 123
 124         m_function = 0;
 125         m_data = 0;
 126
 127         Sys_SetCursorPos( widget, recorded_x, recorded_y );
 128
 129         gdk_pointer_ungrab( GDK_CURRENT_TIME );
 130 }