protected override void SetupRenderLoop(bool oneShot)
{
// only start if we haven't already
if (displayLink != null)
{
return;
}
// bail out if we are requesting something that the view doesn't want to
if (!oneShot && !Element.HasRenderLoop)
{
return;
}
// if this is a one shot request, don't bother with the display link
if (oneShot)
{
var nativeView = Control;
nativeView?.BeginInvokeOnMainThread(() =>
{
if (nativeView.Handle != IntPtr.Zero)
{
nativeView.NeedsDisplay = true;
}
});
return;
}
// create the loop
displayLink = new CVDisplayLink();
displayLink.SetOutputCallback(delegate
{
var nativeView = Control;
var formsView = Element;
// stop the render loop if this was a one-shot, or the views are disposed
if (nativeView == null || formsView == null || nativeView.Handle == IntPtr.Zero || !formsView.HasRenderLoop)
{
displayLink.Stop();
displayLink.Dispose();
displayLink = null;
return(CVReturn.Success);
}
// redraw the view
nativeView?.BeginInvokeOnMainThread(() =>
{
if (nativeView != null)
{
nativeView.NeedsDisplay = true;
}
});
return(CVReturn.Success);
});
displayLink.Start();
}
public override void Stop()
{
if (link == null)
{
return;
}
link?.Stop();
link?.Dispose();
link = null;
}
void DeAllocate()
{
if (_displayLink == null)
{
return;
}
_displayLink.Stop();
_displayLink.Dispose();
_displayLink = null;
}
protected override void Dispose(bool disposing)
{
// stop the render loop
if (displayLink != null)
{
displayLink.Stop();
displayLink.Dispose();
displayLink = null;
}
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
if (_displayLink != null)
{
_displayLink.Dispose();
_displayLink = null;
if (Element != null)
{
Element.DisplayRequested -= Display;
}
}
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
if (_displayLink != null)
{
_displayLink.Dispose();
_displayLink = null;
if (Element != null)
{
((IOpenGlViewController)Element).DisplayRequested -= Display;
}
}
base.Dispose(disposing);
}
partial void DoEnableRenderLoop(bool enable)
{
// stop the render loop
if (!enable)
{
if (displayLink != null)
{
displayLink.Stop();
displayLink.Dispose();
displayLink = null;
}
return;
}
// only start if we haven't already
if (displayLink != null)
{
return;
}
// create the loop
displayLink = new CVDisplayLink();
displayLink.SetOutputCallback(delegate
{
// redraw the view
glView?.BeginInvokeOnMainThread(() =>
{
if (glView != null)
{
glView.NeedsDisplay = true;
}
});
// stop the render loop if it has been disabled or the views are disposed
if (glView == null || !EnableRenderLoop)
{
DoEnableRenderLoop(false);
}
return(CVReturn.Success);
});
displayLink.Start();
}
protected override void SetupRenderLoop(bool oneShot)
{
// only start if we haven't already
if (displayLink != null)
{
return;
}
// bail out if we are requesting something that the view doesn't want to
if (!oneShot && !Element.HasRenderLoop)
{
return;
}
// create the loop
displayLink = new CVDisplayLink();
displayLink.SetOutputCallback(delegate
{
var formsView = Control;
var nativeView = Element;
// redraw the view
formsView?.Display();
// stop the render loop if this was a one-shot, or the views are disposed
if (formsView == null || nativeView == null || !nativeView.HasRenderLoop)
{
displayLink.Stop();
displayLink.Dispose();
displayLink = null;
}
return(CVReturn.Success);
});
displayLink.Start();
}
protected override void DisableTimer()
{
_link?.Stop();
_link?.Dispose();
_link = null;
}
