private void EndMouseOperation()
{
this.mGotMouseDown = LeftMouseButton.IsNotClicked;
this.mCurrentMouseHandler = null;
// Re-enable the data model.
CanvasViewModel.DocumentViewModel.dm_DocumentDataModel.EndOperation("CanvasView mouse operation");
}
private void BeginMouseOperation()
{
//// DebugUtilities.Assert(_gotMouseDown == false, "beginMouseOperation called when already in mouse operation");
this.mGotMouseDown = LeftMouseButton.IsClicked;
// Use the handler specified on Model, if not null. Otherwise, use ourself
// Default is the ICanvasViewMouseHandler interface implementation of the CanvasView
this.mCurrentMouseHandler = this.CanvasViewModel.CanvasViewMouseHandler != null ?
this.CanvasViewModel.CanvasViewMouseHandler : this;
// Don't create undo states at every drag update.
this.CanvasViewModel.DocumentViewModel.dm_DocumentDataModel.BeginOperation("CanvasView mouse operation");
}
public void CancelCanvasViewMouseHandler()
{
var handler = CanvasViewMouseHandler;
CanvasViewMouseHandler = null;
try
{
handler.OnCancelMouseHandler();
}
finally
{
_DocumentViewModel.dm_DocumentDataModel.EndOperation("CanvasViewMouseHandler session");
}
}
public void BeginCanvasViewMouseHandler(ICanvasViewMouseHandler value)
{
if (CanvasViewMouseHandler == value)
{
return; // no change
}
if (CanvasViewMouseHandler != null)
{
CancelCanvasViewMouseHandler();
}
CanvasViewMouseHandler = value;
if (CanvasViewMouseHandler != null)
{
_DocumentViewModel.dm_DocumentDataModel.BeginOperation("CanvasViewMouseHandler session");
}
}
public void FinishCanvasViewMouseHandler()
{
CanvasViewMouseHandler = null;
_DocumentViewModel.dm_DocumentDataModel.EndOperation("CanvasViewMouseHandler session");
}
