[gtk+] scrolledwindow: draw a box in the junction between the two scrollbars

[Cosimo Cecchi <cosimoc src gnome org>]

commit c7ad56786371a06025b8460ce99d03e10999863e
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Fri Feb 3 14:03:52 2012 -0500

    scrolledwindow: draw a box in the junction between the two scrollbars
    
    If there's a junction between the two scrollbars (i.e. they're both
    visible), draw a background with a style class there, so the theme can
    style it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669335

 gtk/gtkscrolledwindow.c |   50 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 50 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index 0bc34af..36e6bce 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -1192,6 +1192,52 @@ gtk_scrolled_window_screen_changed (GtkWidget *widget,
 		     GUINT_TO_POINTER (window_placement_connection));
 }
 
+static void
+gtk_scrolled_window_draw_scrollbars_junction (GtkScrolledWindow *scrolled_window,
+                                              cairo_t *cr)
+{
+  GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+  GtkAllocation wid_allocation, hscr_allocation, vscr_allocation;
+  GtkStyleContext *context;
+  GdkRectangle junction_rect;
+  gboolean is_rtl;
+
+  is_rtl = gtk_widget_get_direction (GTK_WIDGET (scrolled_window)) == GTK_TEXT_DIR_RTL;
+  gtk_widget_get_allocation (GTK_WIDGET (scrolled_window), &wid_allocation);
+  gtk_widget_get_allocation (GTK_WIDGET (priv->hscrollbar), &hscr_allocation);
+  gtk_widget_get_allocation (GTK_WIDGET (priv->vscrollbar), &vscr_allocation);
+
+  junction_rect.x = 0;
+  junction_rect.y = 0;
+  junction_rect.width = vscr_allocation.width;
+  junction_rect.height = hscr_allocation.height;
+  
+  if ((is_rtl && 
+       (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
+        priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
+      (!is_rtl && 
+       (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+        priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
+    junction_rect.x = hscr_allocation.width;
+
+  if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+      priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
+    junction_rect.y = vscr_allocation.height;
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (scrolled_window));
+  gtk_style_context_save (context);
+  gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCROLLBARS_JUNCTION);
+
+  gtk_render_background (context, cr,
+                         junction_rect.x, junction_rect.y,
+                         junction_rect.width, junction_rect.height);
+  gtk_render_frame (context, cr,
+                    junction_rect.x, junction_rect.y,
+                    junction_rect.width, junction_rect.height);
+
+  gtk_style_context_restore (context);
+}
+
 static gboolean
 gtk_scrolled_window_draw (GtkWidget *widget,
                           cairo_t   *cr)
@@ -1206,6 +1252,10 @@ gtk_scrolled_window_draw (GtkWidget *widget,
                          gtk_widget_get_allocated_width (widget),
                          gtk_widget_get_allocated_height (widget));
 
+  if (priv->hscrollbar_visible && 
+      priv->vscrollbar_visible)
+    gtk_scrolled_window_draw_scrollbars_junction (scrolled_window, cr);
+
   if (priv->shadow_type != GTK_SHADOW_NONE)
     {
       GtkAllocation relative_allocation;