private void mCurrentDrawing_ConstructionStepComplete(object sender, Drawing.ConstructionStepCompleteEventArgs args)
{
if (args.ConstructionComplete)
{
ConstructionInProgress = false;
UpdateUndoRedo();
Drawing.ClearStatus();
}
else
{
Drawing.RaiseDisplayProperties(Drawing.Behavior.PropertyBag);
CommandRedo.Enabled = false;
Drawing.RaiseStatusNotification(Drawing.Behavior.ConstructionHintText(args));
}
}
public void Undo()
{
if (ConstructionInProgress)
{
Drawing.Behavior.Restart();
return;
}
try
{
Drawing.ActionManager.Undo();
}
catch (Exception ex)
{
HandleException(ex);
}
UpdateUndoRedo();
Drawing.RaiseDisplayProperties(null);
}
private static void TearOffGeneralCase(IFigure figure)
{
Drawing drawing = figure.Drawing;
using (drawing.ActionManager.CreateTransaction())
{
foreach (var dependency in figure.Dependencies.ToArray())
{
var dependencyPoint = dependency as IPoint;
if (dependencyPoint == null)
{
// for now, can't tear off a figure
// that has a non-point dependency (such as a ParallelLine)
return;
}
if (dependencyPoint is FreePoint)
{
// no need to tear-off from an already free point
// since no one else uses this point
if (dependencyPoint.Dependents.Count == 1)
{
continue;
}
if (dependencyPoint.Dependents.Count == 2 && dependencyPoint.Dependents.OfType <LabelBase>().Count() > 0)
{
continue;
}
}
FreePoint newDependencyPoint = Factory.CreateFreePoint(drawing, dependencyPoint.Coordinates);
Actions.Add(figure.Drawing, newDependencyPoint);
Actions.ReplaceDependency(figure, dependencyPoint, newDependencyPoint);
}
}
drawing.RaiseDisplayProperties(figure);
}