[gtk+/wip/carlosg/event-delivery: 51/104] gtkexpander: Remove event window

[Carlos Garnacho <carlosg src gnome org>]

commit 8731ca6ca5ba362251178057b1f092e1721e8403
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Apr 3 00:33:56 2017 +0200

    gtkexpander: Remove event window
    
    Detect presses/releases inside the label area instead.

 gtk/gtkexpander.c |  111 +++++++++++++++-------------------------------------
 1 files changed, 32 insertions(+), 79 deletions(-)
---
diff --git a/gtk/gtkexpander.c b/gtk/gtkexpander.c
index 836bde9..8aa6ea3 100644
--- a/gtk/gtkexpander.c
+++ b/gtk/gtkexpander.c
@@ -144,7 +144,6 @@ enum
 struct _GtkExpanderPrivate
 {
   GtkWidget        *label_widget;
-  GdkWindow        *event_window;
 
   GtkCssGadget     *gadget;
   GtkWidget        *title_widget;
@@ -161,6 +160,7 @@ struct _GtkExpanderPrivate
   guint             prelight        : 1;
   guint             label_fill      : 1;
   guint             resize_toplevel : 1;
+  guint             pressed_in_title : 1;
 };
 
 static void gtk_expander_set_property (GObject          *object,
@@ -173,12 +173,8 @@ static void gtk_expander_get_property (GObject          *object,
                                        GParamSpec       *pspec);
 
 static void     gtk_expander_destroy        (GtkWidget        *widget);
-static void     gtk_expander_realize        (GtkWidget        *widget);
-static void     gtk_expander_unrealize      (GtkWidget        *widget);
 static void     gtk_expander_size_allocate  (GtkWidget        *widget,
                                              GtkAllocation    *allocation);
-static void     gtk_expander_map            (GtkWidget        *widget);
-static void     gtk_expander_unmap          (GtkWidget        *widget);
 static void     gtk_expander_snapshot       (GtkWidget        *widget,
                                              GtkSnapshot      *snapshot);
 
@@ -225,6 +221,11 @@ static void gtk_expander_state_flags_changed (GtkWidget        *widget,
                                               GtkStateFlags     previous_state);
 
 /* Gestures */
+static void     gesture_multipress_pressed_cb  (GtkGestureMultiPress *gesture,
+                                                gint                  n_press,
+                                                gdouble               x,
+                                                gdouble               y,
+                                                GtkExpander          *expander);
 static void     gesture_multipress_released_cb (GtkGestureMultiPress *gesture,
                                                 gint                  n_press,
                                                 gdouble               x,
@@ -262,11 +263,7 @@ gtk_expander_class_init (GtkExpanderClass *klass)
   gobject_class->get_property = gtk_expander_get_property;
 
   widget_class->destroy              = gtk_expander_destroy;
-  widget_class->realize              = gtk_expander_realize;
-  widget_class->unrealize            = gtk_expander_unrealize;
   widget_class->size_allocate        = gtk_expander_size_allocate;
-  widget_class->map                  = gtk_expander_map;
-  widget_class->unmap                = gtk_expander_unmap;
   widget_class->snapshot             = gtk_expander_snapshot;
   widget_class->enter_notify_event   = gtk_expander_enter_notify;
   widget_class->leave_notify_event   = gtk_expander_leave_notify;
@@ -370,7 +367,6 @@ gtk_expander_init (GtkExpander *expander)
   gtk_widget_set_has_window (GTK_WIDGET (expander), FALSE);
 
   priv->label_widget = NULL;
-  priv->event_window = NULL;
   priv->spacing = 0;
 
   priv->expanded = FALSE;
@@ -403,6 +399,8 @@ gtk_expander_init (GtkExpander *expander)
                                  GDK_BUTTON_PRIMARY);
   gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->multipress_gesture),
                                      FALSE);
+  g_signal_connect (priv->multipress_gesture, "pressed",
+                    G_CALLBACK (gesture_multipress_pressed_cb), expander);
   g_signal_connect (priv->multipress_gesture, "released",
                     G_CALLBACK (gesture_multipress_released_cb), expander);
   gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->multipress_gesture),
@@ -525,39 +523,6 @@ gtk_expander_destroy (GtkWidget *widget)
 }
 
 static void
-gtk_expander_realize (GtkWidget *widget)
-{
-  GtkAllocation allocation;
-  GtkExpanderPrivate *priv;
-
-  priv = GTK_EXPANDER (widget)->priv;
-
-  GTK_WIDGET_CLASS (gtk_expander_parent_class)->realize (widget);
-
-  gtk_widget_get_allocation (widget, &allocation);
-
-  priv->event_window = gdk_window_new_input (gtk_widget_get_window (widget),
-                                             GDK_ALL_EVENTS_MASK,
-                                             &allocation);
-  gtk_widget_register_window (widget, priv->event_window);
-}
-
-static void
-gtk_expander_unrealize (GtkWidget *widget)
-{
-  GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
-
-  if (priv->event_window)
-    {
-      gtk_widget_unregister_window (widget, priv->event_window);
-      gdk_window_destroy (priv->event_window);
-      priv->event_window = NULL;
-    }
-
-  GTK_WIDGET_CLASS (gtk_expander_parent_class)->unrealize (widget);
-}
-
-static void
 gtk_expander_size_allocate (GtkWidget     *widget,
                             GtkAllocation *allocation)
 {
@@ -572,47 +537,37 @@ gtk_expander_size_allocate (GtkWidget     *widget,
                            &clip);
 
   gtk_widget_set_clip (widget, &clip);
-
-  if (gtk_widget_get_realized (widget))
-    {
-      GtkAllocation title_allocation;
-
-      gtk_widget_get_allocation (priv->title_widget, &title_allocation);
-      gdk_window_move_resize (priv->event_window,
-                              title_allocation.x, title_allocation.y,
-                              title_allocation.width, title_allocation.height);
-    }
 }
 
 static void
-gtk_expander_map (GtkWidget *widget)
+gtk_expander_snapshot (GtkWidget   *widget,
+                       GtkSnapshot *snapshot)
 {
-  GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
-
-  gtk_widget_map (priv->title_widget);
-
-  GTK_WIDGET_CLASS (gtk_expander_parent_class)->map (widget);
-
-  if (priv->event_window)
-    gdk_window_show (priv->event_window);
+  gtk_css_gadget_snapshot (GTK_EXPANDER (widget)->priv->gadget, snapshot);
 }
 
 static void
-gtk_expander_unmap (GtkWidget *widget)
+gesture_multipress_pressed_cb (GtkGestureMultiPress *gesture,
+                               gint                  n_press,
+                               gdouble               x,
+                               gdouble               y,
+                               GtkExpander          *expander)
 {
-  GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
-
-  if (priv->event_window)
-    gdk_window_hide (priv->event_window);
+  GtkExpanderPrivate *priv = expander->priv;
+  GtkAllocation title_allocation, allocation;
 
-  GTK_WIDGET_CLASS (gtk_expander_parent_class)->unmap (widget);
-}
+  gtk_widget_get_allocation (GTK_WIDGET (expander), &allocation);
+  gtk_widget_get_allocation (priv->title_widget, &title_allocation);
+  /* Coordinates are in the widget coordinate system, so transform
+   * the title_allocation to it.
+   */
+  title_allocation.x -= allocation.x;
+  title_allocation.y -= allocation.y;
 
-static void
-gtk_expander_snapshot (GtkWidget   *widget,
-                       GtkSnapshot *snapshot)
-{
-  gtk_css_gadget_snapshot (GTK_EXPANDER (widget)->priv->gadget, snapshot);
+  priv->pressed_in_title = (x >= title_allocation.x &&
+                            x < title_allocation.x + title_allocation.width &&
+                            y >= title_allocation.y &&
+                            y < title_allocation.y + title_allocation.height);
 }
 
 static void
@@ -622,7 +577,7 @@ gesture_multipress_released_cb (GtkGestureMultiPress *gesture,
                                 gdouble               y,
                                 GtkExpander          *expander)
 {
-  if (expander->priv->prelight)
+  if (expander->priv->pressed_in_title)
     gtk_widget_activate (GTK_WIDGET (expander));
 }
 
@@ -664,8 +619,7 @@ gtk_expander_enter_notify (GtkWidget        *widget,
 {
   GtkExpander *expander = GTK_EXPANDER (widget);
 
-  if (event->window == expander->priv->event_window &&
-      event->detail != GDK_NOTIFY_INFERIOR)
+  if (event->detail != GDK_NOTIFY_INFERIOR)
     {
       expander->priv->prelight = TRUE;
 
@@ -686,8 +640,7 @@ gtk_expander_leave_notify (GtkWidget        *widget,
 {
   GtkExpander *expander = GTK_EXPANDER (widget);
 
-  if (event->window == expander->priv->event_window &&
-      event->detail != GDK_NOTIFY_INFERIOR)
+  if (event->detail != GDK_NOTIFY_INFERIOR)
     {
       expander->priv->prelight = FALSE;