private void SelectionTimer_Tick(object sender, System.EventArgs e)
{
if (this.IsDisposed || this.ownerControl.IsDisposed)
{
return;
}
if (this.selectedPath == null || this.selectedPath.IsEmpty)
{
this.selectionTimer.Enabled = false;
return;
}
if (!this.enableOutlineAnimation)
{
return;
}
if (this.timer.GetTickCountDouble() < this.coolOffTimeTickCount)
{
return;
}
if (this.ownerControl != null && this.ownerControl.IsMouseCaptured())
{
return;
}
int presentTickMod = (int)((Utility.GetTimeMs() / dancingAntsInterval) % 2);
if (presentTickMod != lastTickMod)
{
lastTickMod = presentTickMod;
dancingAntsT = unchecked (dancingAntsT + 1);
if (this.simplifiedRegionForTimer == null)
{
using (PdnGraphicsPath invalidPath = (PdnGraphicsPath)selectedPath.Clone())
{
invalidPath.CloseAllFigures();
float ratio = 1.0f / (float)OwnerList.ScaleFactor.Ratio;
int inflateAmount = (int)Math.Ceiling(ratio);
this.simplifiedRegionForTimer = Utility.SimplifyTrace(invalidPath, 50);
Utility.InflateRectanglesInPlace(this.simplifiedRegionForTimer, inflateAmount);
}
}
try
{
foreach (Rectangle rect in this.simplifiedRegionForTimer)
{
Invalidate(rect);
}
}
catch (ObjectDisposedException)
{
try
{
this.selectionTimer.Enabled = false;
}
catch (Exception)
{
// Ignore error
}
}
if (this.ownerControl == null || (this.ownerControl != null && !this.ownerControl.IsMouseCaptured()))
{
whiteOpacity = Math.Min(whiteOpacity + 16, 255);
}
}
// If it takes "too long" to render the dancing ants, then we institute
// a cooling-off period during which we will not render the ants.
// This will curb the CPU usage by a few percent, which will avoid us
// monopolizing the CPU.
double maxRenderTime = (double)dancingAntsInterval * maxCpuTime;
if (renderTime > maxRenderTime)
{
double coolOffTime = renderTime / maxRenderTime;
this.coolOffTimeTickCount = timer.GetTickCountDouble() + coolOffTime;
}
this.renderTime = 0.0;
}