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 #if 0
  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 #endif
  45
  46
  47 void Sys_GetCursorPos( ui::Window window, int *x, int *y ){
  48         gdk_display_get_pointer( gdk_display_get_default(), 0, x, y, 0 );
  49 }
  50
  51 void Sys_SetCursorPos( ui::Window window, int x, int y ){
  52         GdkScreen *screen;
  53         gdk_display_get_pointer( gdk_display_get_default(), &screen, 0, 0, 0 );
  54         gdk_display_warp_pointer( gdk_display_get_default(), screen, x, y );
  55 }
  56
  57 gboolean DeferredMotion::gtk_motion(ui::Widget widget, GdkEventMotion *event, DeferredMotion *self)
  58 {
  59     self->motion( event->x, event->y, event->state );
  60     return FALSE;
  61 }
  62
  63 gboolean FreezePointer::motion_delta(ui::Window widget, GdkEventMotion *event, FreezePointer *self)
  64 {
  65         int current_x, current_y;
  66         Sys_GetCursorPos( widget, &current_x, &current_y );
  67         int dx = current_x - self->last_x;
  68         int dy = current_y - self->last_y;
  69         int ddx = current_x - self->center_x;
  70         int ddy = current_y - self->center_y;
  71         self->last_x = current_x;
  72         self->last_y = current_y;
  73         if ( dx != 0 || dy != 0 ) {
  74                 //globalOutputStream() << "motion x: " << dx << ", y: " << dy << "\n";
  75                 if (ddx < -32 || ddx > 32 || ddy < -32 || ddy > 32) {
  76                         Sys_SetCursorPos( widget, self->center_x, self->center_y );
  77                         self->last_x = self->center_x;
  78                         self->last_y = self->center_y;
  79                 }
  80                 self->m_function( dx, dy, event->state, self->m_data );
  81         }
  82         return FALSE;
  83 }
  84
  85 void FreezePointer::freeze_pointer(ui::Window window, ui::Widget widget, FreezePointer::MotionDeltaFunction function, void *data)
  86 {
  87         ASSERT_MESSAGE( m_function == 0, "can't freeze pointer" );
  88
  89         const GdkEventMask mask = static_cast<GdkEventMask>( GDK_POINTER_MOTION_MASK
  90                                                                                                                  | GDK_POINTER_MOTION_HINT_MASK
  91                                                                                                                  | GDK_BUTTON_MOTION_MASK
  92                                                                                                                  | GDK_BUTTON1_MOTION_MASK
  93                                                                                                                  | GDK_BUTTON2_MOTION_MASK
  94                                                                                                                  | GDK_BUTTON3_MOTION_MASK
  95                                                                                                                  | GDK_BUTTON_PRESS_MASK
  96                                                                                                                  | GDK_BUTTON_RELEASE_MASK
  97                                                                                                                  | GDK_VISIBILITY_NOTIFY_MASK );
  98
  99         //GdkCursor* cursor = create_blank_cursor();
 100         GdkCursor* cursor = gdk_cursor_new( GDK_BLANK_CURSOR );
 101         //GdkGrabStatus status =
 102         /*      fixes cursor runaways during srsly quick drags in camera
 103         drags with pressed buttons have no problem at all w/o this      */
 104         gdk_pointer_grab( gtk_widget_get_window(window), TRUE, mask, 0, cursor, GDK_CURRENT_TIME );
 105         //gdk_window_set_cursor ( GTK_WIDGET( window )->window, cursor );
 106         /*      is needed to fix activating neighbour widgets, that happens, if using upper one */
 107         gtk_grab_add( widget );
 108         m_weedjet = widget;
 109
 110         gdk_cursor_unref( cursor );
 111
 112         Sys_GetCursorPos( window, &recorded_x, &recorded_y );
 113
 114         /*      using center for tracking for max safety        */
 115         gdk_window_get_origin( GTK_WIDGET( widget )->window, &center_x, &center_y );
 116         auto allocation = widget.dimensions();
 117         center_y += allocation.height / 2;
 118         center_x += allocation.width / 2;
 119
 120         Sys_SetCursorPos( window, center_x, center_y );
 121
 122         last_x = center_x;
 123         last_y = center_y;
 124
 125         m_function = function;
 126         m_data = data;
 127
 128         handle_motion = window.connect( "motion_notify_event", G_CALLBACK( motion_delta ), this );
 129 }
 130
 131 void FreezePointer::unfreeze_pointer(ui::Window window, bool centerize )
 132 {
 133         g_signal_handler_disconnect( G_OBJECT( window ), handle_motion );
 134
 135         m_function = 0;
 136         m_data = 0;
 137
 138         if ( centerize ){
 139                 Sys_SetCursorPos( window, center_x, center_y );
 140         }
 141         else{
 142                 Sys_SetCursorPos( window, recorded_x, recorded_y );
 143         }
 144
 145 //      gdk_window_set_cursor( GTK_WIDGET( window )->window, 0 );
 146         gdk_pointer_ungrab( GDK_CURRENT_TIME );
 147
 148         if ( m_weedjet )
 149         {
 150                 gtk_grab_remove( m_weedjet );
 151         }
 152 }