app: add log output of key event handling in GimpWindow

using the "key-events" debug key.

app/gimp-log.c

@@ -49,8 +49,9 @@ gimp_log_init (void)
         { "scale",              GIMP_LOG_SCALE              },
         { "wm",                 GIMP_LOG_WM                 },
         { "floating-selection", GIMP_LOG_FLOATING_SELECTION },
+        { "shm",                GIMP_LOG_SHM                },
         { "text-editing",       GIMP_LOG_TEXT_EDITING       },
-        { "shm",                GIMP_LOG_SHM                }
+        { "key-events",         GIMP_LOG_KEY_EVENTS         }
       };
 
       /*  g_parse_debug_string() has special treatment of the string 'help',

app/gimp-log.h

@@ -34,7 +34,8 @@ typedef enum
   GIMP_LOG_WM                 = 1 << 10,
   GIMP_LOG_FLOATING_SELECTION = 1 << 11,
   GIMP_LOG_SHM                = 1 << 12,
-  GIMP_LOG_TEXT_EDITING       = 1 << 13
+  GIMP_LOG_TEXT_EDITING       = 1 << 13,
+  GIMP_LOG_KEY_EVENTS         = 1 << 14
 } GimpLogFlags;
 
 
@@ -89,6 +90,7 @@ void   gimp_logv     (const gchar *function,
 #define FLOATING_SELECTION GIMP_LOG_FLOATING_SELECTION
 #define SHM                GIMP_LOG_SHM
 #define TEXT_EDITING       GIMP_LOG_TEXT_EDITING
+#define KEY_EVENTS         GIMP_LOG_KEY_EVENTS
 
 #if 0 /* last resort */
 #  define GIMP_LOG /* nothing => no varargs, no log */

app/widgets/gimpwindow.c

@@ -28,6 +28,8 @@
 
 #include "gimpwindow.h"
 
+#include "gimp-log.h"
+
 
 static gboolean  gimp_window_key_press_event (GtkWidget   *widget,
                                               GdkEventKey *kevent);
@@ -65,19 +67,43 @@ gimp_window_key_press_event (GtkWidget   *widget,
   if (GTK_IS_EDITABLE (focus)  ||
       GTK_IS_TEXT_VIEW (focus) ||
       GIMP_IS_CANVAS (focus))
-    handled = gtk_window_propagate_key_event (window, event);
+    {
+      handled = gtk_window_propagate_key_event (window, event);
+
+      if (handled)
+        GIMP_LOG (KEY_EVENTS,
+                  "handled by gtk_window_propagate_key_event(text_widget)");
+    }
 
   /* invoke control/alt accelerators */
   if (! handled && event->state & (GDK_CONTROL_MASK | GDK_MOD1_MASK))
-    handled = gtk_window_activate_key (window, event);
+    {
+      handled = gtk_window_activate_key (window, event);
+
+      if (handled)
+        GIMP_LOG (KEY_EVENTS,
+                  "handled by gtk_window_activate_key(modified)");
+    }
 
   /* invoke focus widget handlers */
   if (! handled)
-    handled = gtk_window_propagate_key_event (window, event);
+    {
+      handled = gtk_window_propagate_key_event (window, event);
+
+      if (handled)
+        GIMP_LOG (KEY_EVENTS,
+                  "handled by gtk_window_propagate_key_event(other_widget)");
+    }
 
   /* invoke non-(control/alt) accelerators */
   if (! handled && ! (event->state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)))
-    handled = gtk_window_activate_key (window, event);
+    {
+      handled = gtk_window_activate_key (window, event);
+
+      if (handled)
+        GIMP_LOG (KEY_EVENTS,
+                  "handled by gtk_window_activate_key(unmodified)");
+    }
 
   /* chain up, bypassing gtk_window_key_press(), to invoke binding set */
   if (! handled)
@@ -87,6 +113,10 @@ gimp_window_key_press_event (GtkWidget   *widget,
       widget_class = g_type_class_peek_static (g_type_parent (GTK_TYPE_WINDOW));
 
       handled = widget_class->key_press_event (widget, event);
+
+      if (handled)
+        GIMP_LOG (KEY_EVENTS,
+                  "handled by widget_class->key_press_event()");
     }
 
   return handled;