//Stopwatch sw = new Stopwatch();
private void PathTrackerOnEffectivePathGrow(PathEventArgs args)
{
if (_gesture.Count() >= MaxGestureSteps)
{
return;
}
var gestureChanged = Parse(args);
//如果手势同之前则不需要判断
if (!gestureChanged)
{
return;
}
Debug.WriteLine("GestureChanged");
if (IsInCaptureMode)
{
return;
}
var lastEffectiveIntent = _effectiveIntent;
_effectiveIntent = IntentFinder.Find(_gesture, _currentApp);
if (_effectiveIntent != null)
{
Debug.WriteLine("Call IntentRecognized");
if (IntentRecognized != null)
{
IntentRecognized(_effectiveIntent);
}
}
else if (lastEffectiveIntent != null)
{
if (IntentInvalid != null)
{
IntentInvalid();
}
}
Debug.WriteLine("Gesture:" + _gesture);
}
private void PathTrackerOnPathModifier(PathEventArgs args)
{
Debug.WriteLineIf(_gesture.Modifier != args.Modifier, "Gesture:" + _gesture);
_gesture.Modifier = args.Modifier;
if (IsInCaptureMode)
{
return;
}
//如果当前被“捕获”了，则把修饰符事件发送给命令。
if (_effectiveIntent != null)
{
var modifierStateAwareCommand = _effectiveIntent.Command as IGestureModifiersAware;
if (PathTracker.IsSuspended && modifierStateAwareCommand != null)
{
modifierStateAwareCommand.ModifierTriggered(args.Modifier);
return;
}
}
var lastEffectiveIntent = _effectiveIntent;
_effectiveIntent = IntentFinder.Find(_gesture, args.Context);
if (_effectiveIntent != null)
{
if (IntentRecognized != null && _effectiveIntent != lastEffectiveIntent)
{
IntentRecognized(_effectiveIntent);
}
//如果设置了允许滚动时执行 且 确实可以执行（手势包含滚轮），则执行
//这样执行之后，在释放手势的时候应该 不再执行！
if (_effectiveIntent.CanExecuteOnModifier())
{
OnIntentReadyToExecuteOnModifier(args.Modifier);
var modifierStateAwareCommand = _effectiveIntent.Command as IGestureModifiersAware;
//todo: 这个逻辑似乎应该放在GestureIntent中
if (modifierStateAwareCommand != null)
{
modifierStateAwareCommand.ReportStatus += OnCommandReportStatus;
GestureModifier observedModifiers;
modifierStateAwareCommand.GestureRecognized(out observedModifiers);
//要观察的modifier事件与PathTracker需要排除的恰好相反
PathTracker.SuspendTemprarily(filteredModifiers: GestureModifier.All & ~observedModifiers);
}
else
{
//对于非组合手势，同样unhook除了触发修饰符之外的所有修饰符，这样可以仍然反复执行，实现类似“多出粘贴”的功能！
PathTracker.SuspendTemprarily(filteredModifiers: GestureModifier.None);//GestureModifier.All &~ args.Modifier);
//todo：在这里发布一个事件应该是合理的
_effectiveIntent.Execute(args.Context, this);
}
}
}
else if (lastEffectiveIntent != null)
{
if (IntentInvalid != null)
{
IntentInvalid();
}
}
}