public AddGraphicCommand(IGraphic graphic, GraphicCollection parentCollection)
{
Platform.CheckForNullReference(graphic, "graphic");
Platform.CheckForNullReference(parentCollection, "parentCollection");
_parentCollection = parentCollection;
_graphic = graphic;
}
public InsertGraphicCommand(IGraphic graphic, GraphicCollection parentCollection, int index)
{
Platform.CheckForNullReference(graphic, "graphic");
Platform.CheckForNullReference(parentCollection, "parentCollection");
Platform.CheckTrue(index >= 0, "Insert index positive");
_parentCollection = parentCollection;
_graphic = graphic;
_index = index;
}
public override void Execute()
{
if (_undoCommand != null)
{
throw new InvalidOperationException("The command has already been executed.");
}
_parentCollection.Add(_graphic);
_undoCommand = new RemoveGraphicCommand(_graphic);
_parentCollection = null;
_graphic = null;
}
public override void Execute()
{
if (_undoCommand != null)
{
throw new InvalidOperationException("The command has already been executed.");
}
Validate();
GraphicCollection parentCollection = ((CompositeGraphic)_graphic.ParentGraphic).Graphics;
int restoreIndex = parentCollection.IndexOf(_graphic);
parentCollection.Remove(_graphic);
_undoCommand = new InsertGraphicCommand(_graphic, parentCollection, restoreIndex);
_graphic = null;
}
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);
}
/// <summary>
/// Constructor.
/// </summary>
public AddGraphicUndoableCommand(IGraphic graphic, GraphicCollection parentCollection)
{
_command = new AddGraphicCommand(graphic, parentCollection);
}
/// <summary>
/// Constructor.
/// </summary>
public InsertGraphicUndoableCommand(IGraphic graphic, GraphicCollection parentCollection, int index)
{
_command = new InsertGraphicCommand(graphic, parentCollection, index);
}
