private static IDisposable DrawBackSolid(RectangleF drawRect,
Color color1,
Graphics g,
IDisposable memento)
{
// Cannot draw a zero length rectangle
if ((drawRect.Width > 0) && (drawRect.Height > 0))
{
bool generate = true;
MementoBackSolid cache;
// Access a cache instance and decide if cache resources need generating
if ((memento == null) || !(memento is MementoBackSolid))
{
if (memento != null)
{
memento.Dispose();
}
cache = new MementoBackSolid(drawRect, color1);
memento = cache;
}
else
{
cache = (MementoBackSolid)memento;
generate = !cache.UseCachedValues(drawRect, color1);
}
// Do we need to generate the contents of the cache?
if (generate)
{
// Dispose of existing values
cache.Dispose();
cache.solidBrush = new SolidBrush(color1);
}
if (cache.solidBrush != null)
{
g.FillRectangle(cache.solidBrush, drawRect);
}
}
return(memento);
}
private static IDisposable DrawBackSolid(RectangleF drawRect,
Color color1,
Graphics g,
IDisposable memento)
{
// Cannot draw a zero length rectangle
if ((drawRect.Width > 0) && (drawRect.Height > 0))
{
bool generate = true;
MementoBackSolid cache;
// Access a cache instance and decide if cache resources need generating
if ((memento == null) || !(memento is MementoBackSolid))
{
if (memento != null)
memento.Dispose();
cache = new MementoBackSolid(drawRect, color1);
memento = cache;
}
else
{
cache = (MementoBackSolid)memento;
generate = !cache.UseCachedValues(drawRect, color1);
}
// Do we need to generate the contents of the cache?
if (generate)
{
// Dispose of existing values
cache.Dispose();
cache.solidBrush = new SolidBrush(color1);
}
if (cache.solidBrush != null)
g.FillRectangle(cache.solidBrush, drawRect);
}
return memento;
}
