public void TrySwitchModifierKeyBehavior(KeyEventArgs args)
{
if (this.eventRouter.ActiveBehavior == null || this.eventRouter.IsDragging || (this.eventRouter.IsButtonDown || !this.eventRouter.ActiveBehavior.ToolBehaviorContext.View.Artboard.IsMouseOver) || this.eventRouter.IsEditingText)
{
return;
}
if (this.activeModifierKeyBehavior != null && !this.eventRouter.ContainsBehavior(this.activeModifierKeyBehavior))
{
this.activeModifierKeyBehavior = (ToolBehavior)null;
this.activeModifierKeyBehaviorFactory = (IModifierKeyBehaviorFactory)null;
}
ExtendedModifierKeys extendedModifierKeys = this.ComputeExtendedModifierKeys();
if (this.activeModifierKeyBehaviorFactory != null && !this.activeModifierKeyBehaviorFactory.ShouldActivate(extendedModifierKeys))
{
this.RemoveActiveModifierKeyBehavior();
}
if (args != null && !this.eventRouter.IsDragging)
{
Key key = args.Key == Key.System ? args.SystemKey : args.Key;
if (extendedModifierKeys == ExtendedModifierKeys.None)
{
this.suspendingMode = false;
return;
}
if (!this.modifierKeys.Contains(key) && key != Key.ImeProcessed)
{
this.RemoveActiveModifierKeyBehavior();
this.suspendingMode = true;
}
if (this.suspendingMode)
{
return;
}
}
if (this.activeModifierKeyBehaviorFactory != null)
{
return;
}
foreach (IModifierKeyBehaviorFactory keyBehaviorFactory in this.behaviorFactories)
{
if (keyBehaviorFactory.ShouldActivate(extendedModifierKeys))
{
ToolBehavior instance = keyBehaviorFactory.CreateInstance(this.eventRouter.ActiveBehavior.ToolBehaviorContext);
if (instance != null)
{
this.activeModifierKeyBehavior = instance;
this.activeModifierKeyBehaviorFactory = keyBehaviorFactory;
this.eventRouter.PushBehavior(this.activeModifierKeyBehavior);
break;
}
}
}
}
private void RemoveActiveModifierKeyBehavior()
{
if (this.activeModifierKeyBehaviorFactory == null)
{
return;
}
for (ToolBehavior activeBehavior = this.eventRouter.ActiveBehavior; activeBehavior != this.activeModifierKeyBehavior; activeBehavior = this.eventRouter.ActiveBehavior)
{
this.eventRouter.PopBehavior();
}
this.eventRouter.PopBehavior();
this.eventRouter.ActiveBehavior.ToolBehaviorContext.ToolManager.OverrideTool = (Tool)null;
this.activeModifierKeyBehavior = (ToolBehavior)null;
this.activeModifierKeyBehaviorFactory = (IModifierKeyBehaviorFactory)null;
}
public void Unregister(IModifierKeyBehaviorFactory behaviorFactory)
{
this.behaviorFactories.Remove(behaviorFactory);
}
public void Register(IModifierKeyBehaviorFactory behaviorFactory)
{
this.behaviorFactories.Add(behaviorFactory);
}
