public void ShowSelected(bool draw)
{
foreach (ImageOverlay overlay in _overlays)
{
overlay.ShowIfSelected();
}
if (draw)
{
_image.Draw();
}
}
private void DoFlash(IPresentationImage image, SynchronizationContext syncContext, string message)
{
if (!(image is IOverlayGraphicsProvider))
{
return;
}
GraphicCollection overlayGraphics = ((IOverlayGraphicsProvider)image).OverlayGraphics;
// Prevent multiple flash graphics per image.
var existing = overlayGraphics.OfType <FlashOverlayGraphic>().FirstOrDefault(g => g.Controller == this);
if (existing != null)
{
return;
}
// Very little utility in flashing if nobody's looking at it.
if (syncContext == null)
{
return;
}
var flashOverlayGraphic = new FlashOverlayGraphic(this, message);
overlayGraphics.Add(flashOverlayGraphic);
image.Draw();
ThreadPool.QueueUserWorkItem(
delegate
{
Thread.Sleep(FlashSpeed);
syncContext.Post(delegate
{
if (flashOverlayGraphic.IsDisposed)
{
return;
}
overlayGraphics.Remove(flashOverlayGraphic);
image.Draw();
}, null);
}, null);
}
private void RemovePinwheelGraphic()
{
if (_currentPinwheelGraphic != null)
{
IPresentationImage image = _currentPinwheelGraphic.ParentPresentationImage;
((CompositeGraphic)_currentPinwheelGraphic.ParentGraphic).Graphics.Remove(_currentPinwheelGraphic);
image.Draw();
_currentPinwheelGraphic.Dispose();
}
_currentPinwheelGraphic = null;
}
public override void Cancel()
{
if (_graphicBuilder != null)
{
_graphicBuilder.Cancel();
_graphicBuilder = null;
}
if (_primitiveGraphic != null)
{
IPresentationImage image = _primitiveGraphic.ParentPresentationImage;
RemoveDrawShutterGraphic();
image.Draw();
}
}
/// <summary>
/// Moves the graphic from where ever it is to the target image.
/// </summary>
private static void TranslocateGraphic(IGraphic graphic, IPresentationImage targetImage)
{
IPresentationImage oldImage = graphic.ParentPresentationImage;
if (oldImage != targetImage)
{
IApplicationGraphicsProvider imageOnUnexecute = oldImage as IApplicationGraphicsProvider;
if (imageOnUnexecute != null)
{
imageOnUnexecute.ApplicationGraphics.Remove(graphic);
}
IApplicationGraphicsProvider imageOnExecute = targetImage as IApplicationGraphicsProvider;
if (imageOnExecute != null)
{
imageOnExecute.ApplicationGraphics.Add(graphic);
}
if (oldImage != null)
{
oldImage.Draw();
}
}
}
private void DoFlash(IPresentationImage image, SynchronizationContext syncContext)
{
if (!(image is IOverlayGraphicsProvider))
return;
GraphicCollection overlayGraphics = ((IOverlayGraphicsProvider) image).OverlayGraphics;
//Prevent multiple flash graphics per image.
var existing = overlayGraphics.OfType<FlashOverlayGraphic>().Where(g => g.Controller == this).FirstOrDefault();
if (existing != null)
return;
//Very little utility in flashing if nobody's looking at it.
if (syncContext == null)
return;
var flashOverlayGraphic = new FlashOverlayGraphic(this);
overlayGraphics.Add(flashOverlayGraphic);
image.Draw();
ThreadPool.QueueUserWorkItem(
delegate
{
Thread.Sleep(FlashSpeed);
syncContext.Post(delegate
{
if (flashOverlayGraphic.IsDisposed)
return;
overlayGraphics.Remove(flashOverlayGraphic);
image.Draw();
}, null);
}, null);
}