GTK+: Add hotkey to capture the mouse.

gtk/src/gtk_control.cpp

@@ -99,6 +99,7 @@ const BindingLink b_links[] =
         { "b_seek_to_frame",       "GTK_seek_to_frame" },
         { "b_swap_controllers",    "GTK_swap_controllers" },
         { "b_rewind",              "GTK_rewind"        },
+        { "b_grab_mouse",          "GTK_grab_mouse"    },
 
         { NULL, NULL }
 };
@@ -112,7 +113,7 @@ const int b_breaks[] =
         43, /* End of Graphic options */
         69, /* End of save/load states */
         78, /* End of sound buttons */
-        85, /* End of miscellaneous buttons */
+        86, /* End of miscellaneous buttons */
         -1
 };
 
@@ -289,6 +290,11 @@ void S9xHandlePortCommand (s9xcommand_t cmd, int16 data1, int16 data2)
         {
             change_slot (-1);
         }
+
+        else if (cmd.port[0] == PORT_GRABMOUSE)
+        {
+            top_level->toggle_grab_mouse ();
+        }
     }
 }
 
@@ -437,6 +443,11 @@ s9xcommand_t S9xGetPortCommandT (const char *name)
         cmd.port[0] = PORT_DECREMENTSLOT;
     }
 
+    else if (strstr (name, "GTK_grab_mouse"))
+    {
+        cmd.port[0] = PORT_GRABMOUSE;
+    }
+
 
     else
     {

gtk/src/gtk_control.h

@@ -49,6 +49,7 @@ enum
     PORT_DECREMENTLOADSLOT  = 22,
     PORT_INCREMENTSLOT      = 23,
     PORT_DECREMENTSLOT      = 24,
+    PORT_GRABMOUSE          = 25
 };
 
 typedef struct BindingLink
@@ -61,7 +62,7 @@ typedef struct BindingLink
 extern const BindingLink b_links[];
 extern const int b_breaks[];
 const int NUM_JOYPAD_LINKS = 24;
-const int NUM_EMU_LINKS    = 61;
+const int NUM_EMU_LINKS    = 62;
 
 typedef struct JoypadBinding
 {

gtk/src/gtk_s9xwindow.cpp

@@ -232,6 +232,19 @@ event_motion_notify (GtkWidget      *widget,
         return FALSE;
     }
 
+    if (window->mouse_grabbed)
+    {
+        if (event->x_root == window->mouse_reported_x &&
+            event->y_root == window->mouse_reported_y)
+            return FALSE;
+
+        window->mouse_loc_x += (event->x_root - window->mouse_reported_x);
+        window->mouse_loc_y += (event->y_root - window->mouse_reported_y);
+        window->center_mouse ();
+
+        return FALSE;
+    }
+
 #if GTK_CHECK_VERSION(3,10,0)
     int scale_factor = gdk_window_get_scale_factor (gtk_widget_get_window (GTK_WIDGET (window->get_window ())));
 #else
@@ -594,6 +607,7 @@ Snes9xWindow::Snes9xWindow (Snes9xConfig *config) :
     paused_from_focus_loss = 0;
     cr                     = NULL;
     cairo_owned            = 0;
+    mouse_grabbed          = 0;
 
     if (gtk_icon_theme_has_icon (gtk_icon_theme_get_default (), "snes9x"))
     {
@@ -1804,6 +1818,84 @@ Snes9xWindow::show_mouse_cursor ()
     config->pointer_is_visible = TRUE;
 }
 
+void
+Snes9xWindow::center_mouse ()
+{
+    GdkWindow *gdk_window = gtk_widget_get_window (window);
+    GdkDisplay *gdk_display = gdk_window_get_display (gdk_window);
+    GdkScreen *gdk_screen = gdk_window_get_screen (gdk_window);
+    int x, y, w, h;
+
+    gdk_window_get_origin (gdk_window, &x, &y);
+    w = gdk_window_get_width (gdk_window);
+    h = gdk_window_get_height (gdk_window);
+
+    mouse_reported_x = x + w / 2;
+    mouse_reported_y = y + h / 2;
+
+#if GTK_MAJOR_VERSION < 3
+    gdk_display_warp_pointer (gdk_display, gdk_screen, mouse_reported_x,
+                              mouse_reported_y);
+#elif GTK_MINOR_VERSION < 20
+    GdkDeviceManager *manager = gdk_display_get_device_manager (gdk_display);
+    GdkDevice *pointer = gdk_device_manager_get_client_pointer (manager);
+
+    gdk_device_warp (pointer, gdk_screen, mouse_reported_x, mouse_reported_y);
+#else
+    GdkSeat *seat = gdk_display_get_default_seat (gdk_display);
+    GdkDevice *pointer = gdk_seat_get_pointer (seat);
+
+    gdk_device_warp (pointer, gdk_screen, mouse_reported_x, mouse_reported_y);
+#endif
+}
+
+void
+Snes9xWindow::toggle_grab_mouse ()
+{
+    GdkWindow *gdk_window = gtk_widget_get_window (window);
+    GdkDisplay *gdk_display = gdk_window_get_display (gdk_window);
+
+    if ((!mouse_grabbed && !S9xIsMousePluggedIn ()) || !config->rom_loaded)
+        return;
+
+#if GTK_MAJOR_VERSION < 3
+    if (!mouse_grabbed)
+    {
+        gdk_pointer_grab (gdk_window, TRUE, (GdkEventMask) 1020, gdk_window, empty_cursor, GDK_CURRENT_TIME);
+        center_mouse ();
+    }
+    else
+    {
+        gdk_pointer_ungrab (GDK_CURRENT_TIME);
+        if (config->pointer_is_visible)
+            show_mouse_cursor ();
+    }
+#elif GTK_MINOR_VERSION < 20
+    GdkDeviceManager *manager = gdk_display_get_device_manager (gdk_display);
+    GdkDevice *pointer = gdk_device_manager_get_client_pointer (manager);
+
+    if (!mouse_grabbed)
+        gdk_device_grab (pointer, gdk_window, GDK_OWNERSHIP_NONE, TRUE,
+                         (GdkEventMask) 1020, empty_cursor, GDK_CURRENT_TIME);
+    else
+        gdk_device_ungrab (pointer, GDK_CURRENT_TIME);
+#else
+    GdkSeat *seat = gdk_display_get_default_seat (gdk_display);
+
+    if (!mouse_grabbed)
+        gdk_seat_grab (seat, gdk_window, GDK_SEAT_CAPABILITY_ALL_POINTING, TRUE,
+                       empty_cursor, NULL, NULL, NULL);
+    else
+        gdk_seat_ungrab (seat);
+#endif
+
+    S9xReportPointer (BINDING_MOUSE_POINTER, 0, 0);
+    mouse_loc_x = 0; mouse_loc_y = 0;
+    mouse_grabbed ^= 1;
+    if (mouse_grabbed)
+        center_mouse ();
+}
+
 void
 Snes9xWindow::show ()
 {

gtk/src/gtk_s9xwindow.h

@@ -30,6 +30,8 @@ class Snes9xWindow : public GtkBuilderWindow
         /* Cursor modifying functions */
         void show_mouse_cursor ();
         void hide_mouse_cursor ();
+        void toggle_grab_mouse ();
+        void center_mouse ();
 
         /* Rom-related functions */
         void open_rom_dialog ();
@@ -75,6 +77,8 @@ class Snes9xWindow : public GtkBuilderWindow
         int            focused;
         int            paused_from_focus_loss;
         uint16         mouse_loc_x, mouse_loc_y;
+        uint16         mouse_reported_x, mouse_reported_y;
+        int            mouse_grabbed;
         GdkPixbuf      *icon, *splash;
         GdkCursor      *default_cursor, *empty_cursor;
         GtkDrawingArea *drawing_area;

gtk/src/snes9x.ui

@@ -8709,7 +8709,7 @@
                             <property name="can_focus">False</property>
                             <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                             <property name="border_width">10</property>
-                            <property name="n_rows">7</property>
+                            <property name="n_rows">8</property>
                             <property name="n_columns">2</property>
                             <property name="column_spacing">10</property>
                             <property name="row_spacing">5</property>
@@ -8936,6 +8936,37 @@
                                 <property name="y_options">GTK_FILL</property>
                               </packing>
                             </child>
+                            <child>
+                              <object class="GtkLabel" id="label_grab_mouse">
+                                <property name="visible">True</property>
+                                <property name="can_focus">False</property>
+                                <property name="xalign">0</property>
+                                <property name="label" translatable="yes">Capture/release mouse</property>
+                              </object>
+                              <packing>
+                                <property name="top_attach">7</property>
+                                <property name="bottom_attach">8</property>
+                                <property name="x_options">GTK_FILL</property>
+                                <property name="y_options"/>
+                              </packing>
+                            </child>
+                            <child>
+                              <object class="GtkEntry" id="b_grab_mouse">
+                                <property name="visible">True</property>
+                                <property name="can_focus">True</property>
+                                <property name="primary_icon_activatable">False</property>
+                                <property name="secondary_icon_activatable">False</property>
+                                <property name="primary_icon_sensitive">True</property>
+                                <property name="secondary_icon_sensitive">True</property>
+                              </object>
+                              <packing>
+                                <property name="left_attach">1</property>
+                                <property name="right_attach">2</property>
+                                <property name="top_attach">7</property>
+                                <property name="bottom_attach">8</property>
+                                <property name="y_options">GTK_FILL</property>
+                              </packing>
+                            </child>
                           </object>
                           <packing>
                             <property name="position">4</property>