public override bool Start(IMouseInformation mouseInformation)
{
// don't let the tool start if we're disabled!
if (!this.Enabled)
return false;
base.Start(mouseInformation);
if (_lineGraphicBuilder != null)
return _lineGraphicBuilder.Start(mouseInformation);
IPresentationImage image = mouseInformation.Tile.PresentationImage;
IOverlayGraphicsProvider provider = image as IOverlayGraphicsProvider;
if (provider == null)
return false;
// this memento will be consumed when the graphic builder is completed or cancelled
_originalResliceToolsState = _resliceToolGroup.ToolGroupState.CreateMemento();
TranslocateGraphic(_resliceGraphic, this.SelectedPresentationImage);
// The interactive graphic builders typically operate on new, pristine graphics
// Since our graphic isn't new, clear the points from it! (Otherwise you'll end up with a polyline)
_resliceGraphic.Points.Clear();
_lineGraphicBuilder = new InteractivePolylineGraphicBuilder(2, _resliceGraphic);
_lineGraphicBuilder.GraphicComplete += OnGraphicBuilderDone;
_lineGraphicBuilder.GraphicCancelled += OnGraphicBuilderCancelled;
if (_lineGraphicBuilder.Start(mouseInformation))
{
return true;
}
this.Cancel();
return false;
}
private void RemoveGraphicBuilder()
{
if (_lineGraphicBuilder != null)
{
_lineGraphicBuilder.GraphicComplete -= OnGraphicBuilderDone;
_lineGraphicBuilder.GraphicCancelled -= OnGraphicBuilderCancelled;
_lineGraphicBuilder = null;
}
}
