bool UpdateAllocation(Widget w)
{
if (w.IsRealized)
{
IShadedWidget sw = w as IShadedWidget;
Gdk.Rectangle[] newAllocations;
if (sw != null)
{
List <Gdk.Rectangle> rects = new List <Gdk.Rectangle> ();
foreach (Gdk.Rectangle ar in sw.GetShadedAreas())
{
rects.Add(ar);
}
newAllocations = rects.ToArray();
}
else
{
newAllocations = new Gdk.Rectangle [] { w.Allocation };
}
Gdk.Rectangle[] oldAllocations;
if (allocations.TryGetValue(w, out oldAllocations))
{
if (oldAllocations.Length == newAllocations.Length)
{
bool changed = false;
for (int n = 0; n < oldAllocations.Length; n++)
{
if (newAllocations[n] != oldAllocations[n])
{
changed = true;
break;
}
}
if (!changed)
{
return(false);
}
}
}
allocations [w] = newAllocations;
return(true);
}
else
{
if (!allocations.ContainsKey(w))
{
return(false);
}
allocations.Remove(w);
return(true);
}
}
public void Remove(Widget w)
{
widgets.Remove(w);
allocations.Remove(w);
w.Destroyed -= HandleWDestroyed;
w.Shown -= HandleWShown;
w.Hidden -= HandleWHidden;
w.Realized -= HandleWRealized;
IShadedWidget sw = w as IShadedWidget;
if (sw != null)
{
sw.AreasChanged -= HandleSwAreasChanged;
}
RedrawAll();
}
public void Add(Gtk.Widget w)
{
widgets.Add(w);
UpdateAllocation(w);
w.Destroyed += HandleWDestroyed;
w.Shown += HandleWShown;
w.Hidden += HandleWHidden;
w.SizeAllocated += HandleWSizeAllocated;
w.Realized += HandleWRealized;
IShadedWidget sw = w as IShadedWidget;
if (sw != null)
{
sw.AreasChanged += HandleSwAreasChanged;
}
RedrawAll();
}
void RedrawAll()
{
foreach (Widget w in widgets)
{
if (!w.Visible)
{
continue;
}
IShadedWidget sw = w as IShadedWidget;
if (sw != null)
{
foreach (Gdk.Rectangle rect in sw.GetShadedAreas())
{
w.QueueDrawArea(rect.X, rect.Y, rect.Width, rect.Height);
}
}
else
{
w.QueueDraw();
}
}
}