public TrackBar()
: base()
{
_control = new TrackBarControl();
_control.OnTrackBarValueChanged += () =>
{
if (OnTrackBarValueChanged != null)
OnTrackBarValueChanged();
};
_control.OnInvalidateVisual += () => Dispatcher.BeginInvoke(DispatcherPriority.Render, new Action(InvalidateVisual));
_control.OnInvalidateVisualInRect += (rect) => Dispatcher.BeginInvoke(DispatcherPriority.Render, new Action(() =>
{
InvalidateVisual();
// TODO: It seems you can't invalidate a specific rect in WPF? What?
// http://stackoverflow.com/questions/2576599/possible-to-invalidatevisual-on-a-given-region-instead-of-entire-wpf-control
}));
}
private void Initialize()
{
WantsLayer = true;
OnTrackBarValueChanged += () => {};
OnTrackBarMouseDown += () => {};
OnTrackBarMouseUp += () => {};
// Add tracking area to receive mouse move and mouse dragged events
var opts = NSTrackingAreaOptions.ActiveAlways | NSTrackingAreaOptions.InVisibleRect | NSTrackingAreaOptions.MouseMoved | NSTrackingAreaOptions.EnabledDuringMouseDrag;
var trackingArea = new NSTrackingArea(Bounds, opts, this, new NSDictionary());
AddTrackingArea(trackingArea);
_control = new TrackBarControl();
_control.OnTrackBarValueChanged += () => {
OnTrackBarValueChanged();
};
_control.OnInvalidateVisual += () => InvokeOnMainThread(() => SetNeedsDisplayInRect(Bounds));
_control.OnInvalidateVisualInRect += (rect) => InvokeOnMainThread(() => SetNeedsDisplayInRect(GenericControlHelper.ToRect(rect)));
}
