public void BeginDrawing(TransactedToolDrawingAgent <TChanges> agent, TChanges initialChanges, HistoryMemento beforeDrawingMemento)
{
Validate.Begin().IsNotNull <TransactedToolDrawingAgent <TChanges> >(agent, "agent").IsNotNull <TChanges>(initialChanges, "changes").IsNotNull <HistoryMemento>(beforeDrawingMemento, "beforeDrawingMemento").Check();
((TransactedTool <TDerived, TChanges>) this).VerifyAccess <TransactedTool <TDerived, TChanges> >();
agent.VerifyIsNotActive();
if (this.State != TransactedToolState.Idle)
{
throw new InvalidOperationException($"Can only BeginDrawing when State is Idle (State={this.State}, Tool={base.GetType().Name})");
}
if (this.beforeDrawingMemento != null)
{
throw new InternalErrorException($"this.beforeDrawingMemento != null (Tool={base.GetType().Name})");
}
this.beforeDrawingMemento = beforeDrawingMemento;
TransactedToolDrawingTransactionTokenPrivate <TDerived, TChanges> @private = new TransactedToolDrawingTransactionTokenPrivate <TDerived, TChanges>((TDerived)this);
agent.TransactionToken = @private;
this.drawingAgent = agent;
this.SetState(TransactedToolState.Drawing);
this.Changes = initialChanges.Clone();
}
private void EndDrawing()
{
((TransactedTool <TDerived, TChanges>) this).VerifyAccess <TransactedTool <TDerived, TChanges> >();
if (this.State != TransactedToolState.Drawing)
{
throw new InvalidOperationException($"Can only EndDrawing when State is Drawing (State={this.State}, Tool={base.GetType().Name})");
}
if (this.beforeDrawingMemento == null)
{
throw new InternalErrorException($"this.beforeDrawingMemento == null (Tool={base.GetType().Name})");
}
if (!this.drawingAgent.TransactionToken.IsEnding)
{
this.drawingAgent.TransactionToken.End();
}
else
{
string historyMementoNameForChanges;
ImageResource historyMementoImageForChanges;
this.OnEndingDrawing();
this.drawingAgent.TransactionToken = null;
this.drawingAgent = null;
this.SetState(TransactedToolState.Dirty);
this.CoerceChangesAfterEndDrawing();
if ((this.beforeDrawingMemento == null) && !(this.beforeDrawingMemento is EmptyHistoryMemento))
{
TChanges oldChanges = default(TChanges);
historyMementoNameForChanges = this.GetHistoryMementoNameForChanges(oldChanges, this.Changes);
historyMementoImageForChanges = this.GetHistoryMementoImageForChanges(default(TChanges), this.Changes);
}
else
{
historyMementoNameForChanges = this.beforeDrawingMemento.Name;
historyMementoImageForChanges = this.beforeDrawingMemento.Image;
}
TransactedToolUndoDrawHistoryMemento <TDerived, TChanges> memento = new TransactedToolUndoDrawHistoryMemento <TDerived, TChanges>(base.DocumentWorkspace, historyMementoNameForChanges, historyMementoImageForChanges, this.beforeDrawingMemento);
this.beforeDrawingMemento = null;
base.HistoryStack.PushNewMemento(memento);
}
}
private void CommitDrawing()
{
((TransactedTool <TDerived, TChanges>) this).VerifyAccess <TransactedTool <TDerived, TChanges> >();
if (this.State != TransactedToolState.Drawing)
{
throw new InvalidOperationException($"Can only CommitDrawing when State is Drawing (State={this.State}, Tool={base.GetType().Name})");
}
if (this.beforeDrawingMemento == null)
{
throw new InternalErrorException($"this.beforeDrawingMemento == null (Tool={base.GetType().Name})");
}
if (!this.drawingAgent.TransactionToken.IsCommitting)
{
this.drawingAgent.TransactionToken.Commit();
}
else
{
this.OnEndingDrawing();
this.drawingAgent.TransactionToken = null;
this.drawingAgent = null;
this.SetState(TransactedToolState.Dirty);
this.CoerceChangesAfterEndDrawing();
TChanges newChanges = this.Changes.Clone();
HistoryMemento beforeDrawingMemento = this.beforeDrawingMemento;
this.beforeDrawingMemento = null;
TChanges oldChanges = default(TChanges);
string historyMementoNameForChanges = this.GetHistoryMementoNameForChanges(oldChanges, newChanges);
ImageResource historyMementoImageForChanges = this.GetHistoryMementoImageForChanges(default(TChanges), newChanges);
TransactedToolUndoDrawHistoryMemento <TDerived, TChanges> memento2 = new TransactedToolUndoDrawHistoryMemento <TDerived, TChanges>(base.DocumentWorkspace, historyMementoNameForChanges, historyMementoImageForChanges, beforeDrawingMemento);
TransactedToolUndoCommitHistoryMemento <TDerived, TChanges> memento3 = this.TryCommitChanges();
if (!(beforeDrawingMemento is EmptyHistoryMemento) || !(memento3.InnerMemento is EmptyHistoryMemento))
{
HistoryMemento[] actions = new HistoryMemento[] { memento2, memento3 };
CompoundHistoryMemento memento4 = new CompoundHistoryMemento(memento3.Name, memento3.Image, actions);
base.HistoryStack.PushNewMemento(memento4);
}
}
}
private void CancelDrawing()
{
((TransactedTool <TDerived, TChanges>) this).VerifyAccess <TransactedTool <TDerived, TChanges> >();
if (this.State != TransactedToolState.Drawing)
{
throw new InvalidOperationException($"Can only CancelDrawing when State is Drawing (State={this.State}, Tool={base.GetType().Name})");
}
if (!this.drawingAgent.TransactionToken.IsCanceling)
{
this.drawingAgent.TransactionToken.Cancel();
}
else
{
this.OnCancelingDrawing();
this.drawingAgent.TransactionToken = null;
this.drawingAgent = null;
this.SetState(TransactedToolState.Idle);
this.Changes = default(TChanges);
HistoryMemento beforeDrawingMemento = this.beforeDrawingMemento;
this.beforeDrawingMemento = null;
beforeDrawingMemento.PerformUndo(null);
}
}
public void BeginDrawing(TransactedToolDrawingAgent <TChanges> agent, TChanges initialChanges, string mementoName, ImageResource mementoImage)
{
this.BeginDrawing(agent, initialChanges, new EmptyHistoryMemento(mementoName, mementoImage));
}
public void BeginDrawing(TransactedToolDrawingAgent <TChanges> agent, TChanges initialChanges)
{
this.BeginDrawing(agent, initialChanges, base.Name, base.Image);
}
