linux-packaging-mono/external/bockbuild/packages/patches/gtk/0071-light-and-dark-overlay-scrollbars.patch

diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index a643b7d..02920ce 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -282,6 +282,10 @@ static gboolean gtk_scrolled_window_calculate_velocity  (GtkScrolledWindow *scro
                                                          GdkEvent          *event);
 static void gtk_scrolled_window_init_overlay_scrollbars (GtkScrolledWindow *window);

+static void gtk_scrolled_window_style_changed (GtkWidget  *widget,
+					       GParamSpec *property,
+					       gpointer    user_data);
+static void update_overlay_scrollbar_color (GtkWidget *widget);

 static guint signals[LAST_SIGNAL] = {0};

@@ -1149,7 +1153,7 @@ gtk_scrolled_window_set_property (GObject      *object,
				  GParamSpec   *pspec)
 {
   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
-
+
   switch (prop_id)
     {
     case PROP_HADJUSTMENT:
@@ -1457,7 +1461,6 @@ gtk_scrolled_window_expose (GtkWidget      *widget,
			    GdkEventExpose *event)
 {
   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
-  GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (widget);

   if (gtk_widget_is_drawable (widget))
     {
@@ -3085,6 +3088,11 @@ gtk_scrolled_window_add (GtkContainer *container,
   bin->child = child;
   gtk_widget_set_parent (child, GTK_WIDGET (bin));

+  g_signal_connect (scrolled_window,
+		    "notify::style",
+		    G_CALLBACK (gtk_scrolled_window_style_changed),
+		    NULL);
+
   /* this is a temporary message */
   if (!gtk_widget_set_scroll_adjustments (child,
                                           gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
@@ -3224,6 +3232,43 @@ _gtk_scrolled_window_get_scrollbar_spacing (GtkScrolledWindow *scrolled_window)
 }

 static void
+gtk_scrolled_window_style_changed (GtkWidget  *widget,
+				   GParamSpec *property,
+				   gpointer    user_data)
+{
+  update_overlay_scrollbar_color (widget);
+}
+
+static void
+update_overlay_scrollbar_color (GtkWidget *widget)
+{
+  GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (widget);
+  GtkStyle *style;
+  GdkColor c;
+  gdouble r, g, b;
+  gfloat cc;
+  gint brightness;
+
+  style = gtk_widget_get_style (widget);
+  c = style->bg[GTK_STATE_NORMAL];
+
+  r = (gdouble)c.red;
+  g = (gdouble)c.green;
+  b = (gdouble)c.blue;
+
+  brightness = (int)(sqrt (r * r * 0.241 +
+			   g * g * 0.691 +
+			   b * b * 0.068) / 256.0);
+
+  cc = brightness < 130 ? 1.0 : 0.0;
+
+  [priv->vbar_layer setBackgroundColor: CGColorCreateGenericRGB (cc, cc, cc, 0.5)];
+  [priv->vslider_layer setBackgroundColor: CGColorCreateGenericRGB (cc, cc, cc, 1.0)];
+  [priv->hbar_layer setBackgroundColor: CGColorCreateGenericRGB (cc, cc, cc, 0.5)];
+  [priv->hslider_layer setBackgroundColor: CGColorCreateGenericRGB (cc, cc, cc, 1.0)];
+}
+
+static void
 gtk_scrolled_window_realize (GtkWidget *widget)
 {
   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
@@ -3313,21 +3358,22 @@ gtk_scrolled_window_realize (GtkWidget *widget)
   parent_layer = [layer_view layer];

   priv->vbar_layer = [[CALayer layer] retain];
-  priv->vbar_layer.backgroundColor = CGColorCreateGenericRGB (0.0, 0.0, 0.0, 0.5);
   priv->vbar_layer.hidden = YES;

   priv->vslider_layer = [[CALayer layer] retain];
-  priv->vslider_layer.backgroundColor = CGColorCreateGenericRGB (0.0, 0.0, 0.0, 1.0);
   priv->vslider_layer.hidden = YES;

   priv->hbar_layer = [[CALayer layer] retain];
-  priv->hbar_layer.backgroundColor = CGColorCreateGenericRGB (0.0, 0.0, 0.0, 0.5);
   priv->hbar_layer.hidden = YES;

   priv->hslider_layer = [[CALayer layer] retain];
-  priv->hslider_layer.backgroundColor = CGColorCreateGenericRGB (0.0, 0.0, 0.0, 1.0);
   priv->hslider_layer.hidden = YES;

+  priv->vbar_layer.backgroundColor = CGColorCreateGenericRGB (0, 0, 0, 0.5);
+  priv->vslider_layer.backgroundColor = CGColorCreateGenericRGB (0, 0, 0, 1.0);
+  priv->hbar_layer.backgroundColor = CGColorCreateGenericRGB (0, 0, 0, 0.5);
+  priv->hslider_layer.backgroundColor = CGColorCreateGenericRGB (0, 0, 0, 1.0);
+
   [parent_layer addSublayer:priv->vbar_layer];
   [parent_layer addSublayer:priv->vslider_layer];