[gtk+] inspector: Allow picking insensitive widgets

[Timm Bäder <baedert src gnome org>]

commit 8224e7ac722c9cdf21ae36e2b33bec20580c4692
Author: Timm Bäder <mail baedert org>
Date:   Fri Jan 19 10:16:15 2018 +0100

    inspector: Allow picking insensitive widgets
    
    The default gtk_widget_contains/gtk_widget_pick don't consider
    insensitive widgets.

 gtk/gtkwidget.c                |    6 +----
 gtk/gtkwidgetprivate.h         |    6 +++++
 gtk/inspector/inspect-button.c |   47 +++++++++++++++++++++++++++++++++++++++-
 3 files changed, 53 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 55c4d60..d074b52 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -648,10 +648,6 @@ static AtkObject*  gtk_widget_ref_accessible               (AtkImplementor *implementor);
 static gboolean         gtk_widget_real_can_activate_accel      (GtkWidget *widget,
                                                                  guint      signal_id);
 
-static void             gtk_widget_get_origin_relative_to_parent(GtkWidget        *widget,
-                                                                 int              *origin_x,
-                                                                 int              *origin_y);
-
 static void             gtk_widget_real_set_has_tooltip         (GtkWidget *widget,
                                                                 gboolean   has_tooltip,
                                                                 gboolean   force);
@@ -4830,7 +4826,7 @@ gtk_widget_common_ancestor (GtkWidget *widget_a,
   return widget_a;
 }
 
-static void
+void
 gtk_widget_get_origin_relative_to_parent (GtkWidget *widget,
                                           int       *origin_x,
                                           int       *origin_y)
diff --git a/gtk/gtkwidgetprivate.h b/gtk/gtkwidgetprivate.h
index da80377..75e84fe 100644
--- a/gtk/gtkwidgetprivate.h
+++ b/gtk/gtkwidgetprivate.h
@@ -332,6 +332,12 @@ gboolean          gtk_widget_emit_event_signals            (GtkWidget      *widg
 
 void              gtk_widget_init_legacy_controller        (GtkWidget *widget);
 
+void              gtk_widget_get_origin_relative_to_parent (GtkWidget        *widget,
+                                                            int              *origin_x,
+                                                            int              *origin_y);
+
+
+
 
 /* inline getters */
 
diff --git a/gtk/inspector/inspect-button.c b/gtk/inspector/inspect-button.c
index 517e716..987eb4f 100644
--- a/gtk/inspector/inspect-button.c
+++ b/gtk/inspector/inspect-button.c
@@ -30,6 +30,51 @@
 #include "gtkstack.h"
 #include "gtkmain.h"
 #include "gtkinvisible.h"
+#include "gtkwidgetprivate.h"
+
+
+static gboolean
+inspector_contains (GtkWidget *widget,
+                    double     x,
+                    double     y)
+{
+  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
+
+  if (!gtk_widget_is_drawable (widget))
+    return FALSE;
+
+  return GTK_WIDGET_GET_CLASS (widget)->contains (widget, x, y);
+}
+
+static GtkWidget *
+inspector_pick (GtkWidget *widget,
+                double     x,
+                double     y)
+{
+  /* Like gtk_widget_pick and gtk_widget_contains,
+   * but we need to consider insensitive widgets as well. */
+  GtkWidget *child;
+
+  for (child = _gtk_widget_get_last_child (widget);
+       child;
+       child = _gtk_widget_get_prev_sibling (child))
+    {
+      GtkWidget *picked;
+      int dx, dy;
+
+      gtk_widget_get_origin_relative_to_parent (child, &dx, &dy);
+
+      picked = inspector_pick (child, x - dx, y - dy);
+      if (picked)
+        return picked;
+    }
+
+
+  if (!inspector_contains (widget, x, y))
+    return NULL;
+
+  return widget;
+}
 
 static GtkWidget *
 find_widget_at_pointer (GdkDevice *device)
@@ -73,7 +118,7 @@ find_widget_at_pointer (GdkDevice *device)
       gdk_window_get_device_position_double (gtk_widget_get_window (widget),
                                              device, &x, &y, NULL);
 
-      widget = gtk_widget_pick (widget, x, y);
+      widget = inspector_pick (widget, x, y);
     }
 
   return widget;