protected override void OnDetachChild(UIElement child)
{
CompositionTarget.Rendering -= OnFrameCallback;
child.PreviewMouseLeftButtonUp -= OnMouseLeftButtonUp;
_timeTracker = null;
}
private void OnTimerFired(object sender, EventArgs e)
{
if (_upperRing < _ringCount)
{
_upperRing++;
}
else
{
_lowerRing++;
if (_lowerRing >= _upperRing)
{
_timeTracker.TimerFired -= OnTimerFired;
_timeTracker = null;
CompositionTarget.Rendering -= OnFrameCallback;
}
}
}
public MagnitismCanvas()
: base()
{
CompositionTarget.Rendering += UpdateChildren;
_timeTracker = new TimeTracker();
}
private void OnMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (_timeTracker != null)
{
_timeTracker.TimerFired -= OnTimerFired;
_timeTracker = null;
}
CompositionTarget.Rendering += OnFrameCallback;
_timeTracker = new TimeTracker();
_timeTracker.TimerInterval = _ringDelayInSeconds;
_timeTracker.TimerFired += OnTimerFired;
_lowerRing = _upperRing = 0;
_clickPosition = e.GetPosition(this);
}
protected override void OnAttachChild(UIElement child)
{
CompositionTarget.Rendering += OnFrameCallback;
child.PreviewMouseLeftButtonUp += OnMouseLeftButtonUp;
child.PreviewMouseMove += OnMouseMove;
_timeTracker = new TimeTracker();
}