[gimp] app: derive GimpFgBgEditor from GtkEventBox instead of GtkDrawingArea

[Michael Natterer <mitch src gnome org>]

commit 81fe78bd9b292fb5e062dd5a3b5a284aa7b413d3
Author: Michael Natterer <mitch gimp org>
Date:   Fri May 19 12:02:48 2017 +0200

    app: derive GimpFgBgEditor from GtkEventBox instead of GtkDrawingArea
    
    it doesn't need a visible GdkWindow.

 app/widgets/gimpfgbgeditor.c |   14 +++++++++-----
 app/widgets/gimpfgbgeditor.h |    4 ++--
 2 files changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/app/widgets/gimpfgbgeditor.c b/app/widgets/gimpfgbgeditor.c
index 96c935d..d06dede 100644
--- a/app/widgets/gimpfgbgeditor.c
+++ b/app/widgets/gimpfgbgeditor.c
@@ -102,7 +102,7 @@ static void     gimp_fg_bg_editor_create_transform  (GimpFgBgEditor   *editor);
 static void     gimp_fg_bg_editor_destroy_transform (GimpFgBgEditor   *editor);
 
 
-G_DEFINE_TYPE (GimpFgBgEditor, gimp_fg_bg_editor, GTK_TYPE_DRAWING_AREA)
+G_DEFINE_TYPE (GimpFgBgEditor, gimp_fg_bg_editor, GTK_TYPE_EVENT_BOX)
 
 #define parent_class gimp_fg_bg_editor_parent_class
 
@@ -154,6 +154,8 @@ gimp_fg_bg_editor_init (GimpFgBgEditor *editor)
 {
   editor->active_color = GIMP_ACTIVE_COLOR_FOREGROUND;
 
+  gtk_event_box_set_visible_window (GTK_EVENT_BOX (editor), FALSE);
+
   gtk_widget_add_events (GTK_WIDGET (editor),
                          GDK_BUTTON_PRESS_MASK |
                          GDK_BUTTON_RELEASE_MASK);
@@ -276,7 +278,6 @@ gimp_fg_bg_editor_expose (GtkWidget      *widget,
     return FALSE;
 
   cr = gdk_cairo_create (eevent->window);
-
   gdk_cairo_region (cr, eevent->region);
   cairo_clip (cr);
 
@@ -285,6 +286,8 @@ gimp_fg_bg_editor_expose (GtkWidget      *widget,
   width  = allocation.width;
   height = allocation.height;
 
+  cairo_translate (cr, allocation.x, allocation.y);
+
   /*  draw the default colors pixbuf  */
   if (! editor->default_icon)
     editor->default_icon = gimp_widget_load_icon (widget,
@@ -384,8 +387,8 @@ gimp_fg_bg_editor_expose (GtkWidget      *widget,
                     editor->active_color == GIMP_ACTIVE_COLOR_FOREGROUND ?
                     GTK_SHADOW_OUT : GTK_SHADOW_IN,
                     NULL, widget, NULL,
-                    (width - rect_w),
-                    (height - rect_h),
+                    allocation.x + (width - rect_w),
+                    allocation.y + (height - rect_h),
                     rect_w, rect_h);
 
 
@@ -434,7 +437,8 @@ gimp_fg_bg_editor_expose (GtkWidget      *widget,
                     editor->active_color == GIMP_ACTIVE_COLOR_BACKGROUND ?
                     GTK_SHADOW_OUT : GTK_SHADOW_IN,
                     NULL, widget, NULL,
-                    0, 0,
+                    allocation.x,
+                    allocation.y,
                     rect_w, rect_h);
 
   cairo_destroy (cr);
diff --git a/app/widgets/gimpfgbgeditor.h b/app/widgets/gimpfgbgeditor.h
index 19b57e5..ebb9643 100644
--- a/app/widgets/gimpfgbgeditor.h
+++ b/app/widgets/gimpfgbgeditor.h
@@ -34,7 +34,7 @@ typedef struct _GimpFgBgEditorClass GimpFgBgEditorClass;
 
 struct _GimpFgBgEditor
 {
-  GtkDrawingArea      parent_instance;
+  GtkEventBox         parent_instance;
 
   GimpContext        *context;
   GimpColorConfig    *color_config;
@@ -52,7 +52,7 @@ struct _GimpFgBgEditor
 
 struct _GimpFgBgEditorClass
 {
-  GtkDrawingAreaClass  parent_class;
+  GtkEventBoxClass    parent_class;
 
   /*  signals  */