protected virtual IDisposable DrawRibbonAppMenuInner(RenderContext context,
Rectangle rect,
PaletteState state,
IPaletteRibbonBack palette,
IDisposable memento)
{
if ((rect.Width > 0) && (rect.Height > 0))
{
Color c1 = palette.GetRibbonBackColor1(state);
Color c2 = palette.GetRibbonBackColor2(state);
bool generate = true;
MementoRibbonAppButtonInner cache;
// Access a cache instance and decide if cache resources need generating
if ((memento == null) || !(memento is MementoRibbonAppButtonInner))
{
if (memento != null)
memento.Dispose();
cache = new MementoRibbonAppButtonInner(rect, c1, c2);
memento = cache;
}
else
{
cache = (MementoRibbonAppButtonInner)memento;
generate = !cache.UseCachedValues(rect, c1, c2);
}
// Do we need to generate the contents of the cache?
if (generate)
{
// Dispose of existing values
cache.Dispose();
cache.outsideBrush = new SolidBrush(c1);
cache.insideBrush = new SolidBrush(c2);
}
// Draw the outside in one color and the inside with another
context.Graphics.FillRectangle(cache.outsideBrush, rect);
rect.Inflate(-1, -1);
context.Graphics.FillRectangle(cache.insideBrush, rect);
}
return memento;
}