private void Activate()
{
Debug.Assert(this.active != true, "already active!");
this.active = true;
this.handCursor = new Cursor(PdnResources.GetResourceStream("Cursors.PanToolCursor.cur"));
this.handCursorMouseDown = new Cursor(PdnResources.GetResourceStream("Cursors.PanToolCursorMouseDown.cur"));
this.handCursorInvalid = new Cursor(PdnResources.GetResourceStream("Cursors.PanToolCursorInvalid.cur"));
this.panTracking = false;
this.panMode = false;
this.mouseDown = 0;
this.savedTiles = null;
this.saveRegion = null;
this.scratchSurface = DocumentWorkspace.BorrowScratchSurface(this.GetType().Name + ": Tool.Activate()");
#if DEBUG
this.haveClearedScratch = false;
#endif
Selection.Changing += new EventHandler(SelectionChangingHandler);
Selection.Changed += new EventHandler(SelectionChangedHandler);
HistoryStack.ExecutingHistoryMemento += new ExecutingHistoryMementoEventHandler(ExecutingHistoryMemento);
HistoryStack.ExecutedHistoryMemento += new ExecutedHistoryMementoEventHandler(ExecutedHistoryMemento);
HistoryStack.FinishedStepGroup += new EventHandler(FinishedHistoryStepGroup);
this.trackingNub = new MoveNubRenderer(this.RendererList);
this.trackingNub.Visible = false;
this.trackingNub.Size = new SizeF(10, 10);
this.trackingNub.Shape = MoveNubShape.Compass;
this.RendererList.Add(this.trackingNub, false);
OnActivate();
}
private void Deactivate()
{
Debug.Assert(this.active != false, "not active!");
this.active = false;
Selection.Changing -= new EventHandler(SelectionChangingHandler);
Selection.Changed -= new EventHandler(SelectionChangedHandler);
HistoryStack.ExecutingHistoryMemento -= new ExecutingHistoryMementoEventHandler(ExecutingHistoryMemento);
HistoryStack.ExecutedHistoryMemento -= new ExecutedHistoryMementoEventHandler(ExecutedHistoryMemento);
HistoryStack.FinishedStepGroup -= new EventHandler(FinishedHistoryStepGroup);
OnDeactivate();
this.RendererList.Remove(this.trackingNub);
this.trackingNub.Dispose();
this.trackingNub = null;
DocumentWorkspace.ReturnScratchSurface(this.scratchSurface);
this.scratchSurface = null;
if (this.saveRegion != null)
{
this.saveRegion.Dispose();
this.saveRegion = null;
}
this.savedTiles = null;
if (this.handCursor != null)
{
this.handCursor.Dispose();
this.handCursor = null;
}
if (this.handCursorMouseDown != null)
{
this.handCursorMouseDown.Dispose();
this.handCursorMouseDown = null;
}
if (this.handCursorInvalid != null)
{
this.handCursorInvalid.Dispose();
this.handCursorInvalid = null;
}
}