private void OnSelectionChanged(object sender, EventArgs e)
{
this.render = true;
PdnGraphicsPath path = this.selection.CreatePath();
if (this.selectedPath == null)
{
Invalidate();
}
else
{
this.selectedPath.Dispose();
this.selectedPath = null;
}
bool fullInvalidate = false;
this.selectedPath = path;
// HACK: Sometimes the selection leaves behind artifacts. So do a full invalidate
// every 1 second.
if (this.selectedPath.PointCount > 10 && (DateTime.Now - lastFullInvalidate > new TimeSpan(0, 0, 0, 1, 0)))
{
fullInvalidate = true;
}
// if we're moving to a simpler selection region ...
if (this.selectedPath == null)// || this.selectedPath.PointCount == 0)
{
// then invalidate everything
fullInvalidate = true;
}
else
{
// otherwise, be intelligent about it and only redraw the 'new' area
PdnRegion xorMe = new PdnRegion(this.selectedPath);
selectionRedrawInterior.Xor(xorMe);
xorMe.Dispose();
}
float ratio = 1.0f / (float)OwnerList.ScaleFactor.Ratio;
int ratioInt = (int)Math.Ceiling(ratio);
if (this.Visible && (this.EnableSelectionOutline || this.EnableSelectionTinting))
{
using (PdnRegion simplified = Utility.SimplifyAndInflateRegion(selectionRedrawInterior, Utility.DefaultSimplificationFactor, 2 * ratioInt))
{
Invalidate(simplified);
}
}
if (fullInvalidate)
{
Rectangle rect = Rectangle.Inflate(Rectangle.Truncate(selectionRedrawOutline.GetBounds2()), 1, 1);
Invalidate(rect);
lastFullInvalidate = DateTime.Now;
}
this.selectionRedrawInterior.Dispose();
this.selectionRedrawInterior = null;
if (this.zoomInSelectedPath != null)
{
this.zoomInSelectedPath.Dispose();
this.zoomInSelectedPath = null;
}
this.simplifiedRegionForTimer = null;
// prepare for next call
if (this.selectedPath != null && !this.selectedPath.IsEmpty)
{
this.selectionRedrawOutline = (PdnGraphicsPath)this.selectedPath.Clone();
this.selectionRedrawInterior = new PdnRegion(this.selectedPath);
}
else
{
if (invertedTinting)
{
this.selectionRedrawInterior = new PdnRegion(new Rectangle(0, 0, this.SourceSize.Width, this.SourceSize.Height));
}
else
{
this.selectionRedrawInterior = new PdnRegion();
this.selectionRedrawInterior.MakeEmpty();
}
Invalidate();
this.selectionRedrawOutline = new PdnGraphicsPath();
}
}