public override bool Start(IMouseInformation mouseInformation)
{
base.Start(mouseInformation);
if (_graphicBuilder != null)
{
return(_graphicBuilder.Start(mouseInformation));
}
IPresentationImage image = mouseInformation.Tile.PresentationImage;
if (!CanStart(image))
{
return(false);
}
var provider = (IOverlayGraphicsProvider)image;
IControlGraphic graphic = _graphicDelegateCreatorDelegate();
_graphicBuilder = _interactiveGraphicBuilderDelegate(graphic);
_graphicBuilder.GraphicComplete += OnGraphicBuilderInitiallyDone;
_graphicBuilder.GraphicCancelled += OnGraphicBuilderInitiallyDone;
_graphicBuilder.GraphicFinalComplete += OnGraphicFinalComplete;
_graphicBuilder.GraphicFinalCancelled += OnGraphicFinalCancelled;
AddGraphic(image, graphic, provider);
if (_graphicBuilder.Start(mouseInformation))
{
return(true);
}
this.Cancel();
return(false);
}
/// <summary>
/// Fired when the graphic builder is also done setting text in the graphic, and thus we can decide if we want to unexecute
/// the insert or save the command into the history.
/// </summary>
private void OnGraphicFinalCancelled(object sender, GraphicEventArgs e)
{
InteractiveTextGraphicBuilder graphicBuilder = sender as InteractiveTextGraphicBuilder;
if (graphicBuilder != null)
{
graphicBuilder.GraphicFinalComplete -= OnGraphicFinalComplete;
graphicBuilder.GraphicFinalCancelled -= OnGraphicFinalCancelled;
}
_undoableCommand.Unexecute();
_undoableCommand = null;
}
/// <summary>
/// Fired when the graphic builder is also done setting text in the graphic, and thus we can decide if we want to unexecute
/// the insert or save the command into the history.
/// </summary>
private void OnGraphicFinalComplete(object sender, GraphicEventArgs e)
{
// fired
InteractiveTextGraphicBuilder graphicBuilder = sender as InteractiveTextGraphicBuilder;
if (graphicBuilder != null)
{
graphicBuilder.GraphicFinalComplete -= OnGraphicFinalComplete;
graphicBuilder.GraphicFinalCancelled -= OnGraphicFinalCancelled;
}
e.Graphic.ImageViewer.CommandHistory.AddCommand(_undoableCommand);
_undoableCommand = null;
}
public override bool Stop(IMouseInformation mouseInformation)
{
if (_graphicBuilder == null)
{
return(false);
}
if (_graphicBuilder.Stop(mouseInformation))
{
return(true);
}
_graphicBuilder.Graphic.ImageViewer.CommandHistory.AddCommand(_undoableCommand);
_graphicBuilder = null;
_undoableCommand = null;
return(false);
}
/// <summary>
/// Fired when the graphic builder is done placing the graphic, and hence does not need mouse capture anymore, but in the
/// text graphic is not technically complete yet and thus we do not insert into the command history yet.
/// </summary>
private void OnGraphicBuilderInitiallyDone(object sender, GraphicEventArgs e)
{
_graphicBuilder.GraphicComplete -= OnGraphicBuilderInitiallyDone;
_graphicBuilder.GraphicCancelled -= OnGraphicBuilderInitiallyDone;
_graphicBuilder = null;
}
