/// <summary>
/// Attaches the renderer to the given SwapChainBackgroundPanel.
/// </summary>
/// <param name="targetPanel">The target panel to attach to.</param>
private void AttachInternal(SwapChainPanelWrapper targetPanel)
{
if (m_targetPanel != null)
{
throw new InvalidOperationException("Unable to attach to new SwapChainBackgroundPanel: Renderer is already attached to another one!");
}
m_lastRefreshTargetSize = new Size(0.0, 0.0);
m_targetPanel = targetPanel;
// Attach to SizeChanged event (refresh view resources only after a specific time)
m_observerSizeChanged = Observable.FromEventPattern <SizeChangedEventArgs>(m_targetPanel, "SizeChanged")
.Throttle(TimeSpan.FromSeconds(0.5))
.ObserveOn(SynchronizationContext.Current)
.Subscribe((eArgs) => OnTargetPanelThrottled_SizeChanged(eArgs.Sender, eArgs.EventArgs));
m_targetPanel.SizeChanged += OnTargetPanel_SizeChanged;
m_targetPanel.Loaded += OnTargetPanel_Loaded;
m_targetPanel.Unloaded += OnTargetPanel_Unloaded;
m_targetPanel.CompositionScaleChanged += OnTargetPanel_CompositionScaleChanged;
UpdateRenderLoopViewSize();
// Define unloading behavior
if (VisualTreeHelper.GetParent(m_targetPanel.Panel) != null)
{
m_renderLoop.RegisterRenderLoop();
}
}
/// <summary>
/// Detaches the renderer from the current target panel.
/// </summary>
public void Detach()
{
try
{
if (m_targetPanel == null)
{
return;
}
// Clear view resources
m_renderLoop.UnloadViewResources();
m_renderLoop.DeregisterRenderLoop();
// Clear event registrations
m_targetPanel.SizeChanged -= OnTargetPanel_SizeChanged;
m_targetPanel.Loaded -= OnTargetPanel_Loaded;
m_targetPanel.Unloaded -= OnTargetPanel_Unloaded;
m_targetPanel.CompositionScaleChanged -= OnTargetPanel_CompositionScaleChanged;
//Clear created references
m_observerSizeChanged.Dispose();
m_observerSizeChanged = null;
m_targetPanel.Dispose();
m_targetPanel = null;
}
catch (Exception ex)
{
CommonTools.RaiseUnhandledException(
this.GetType(), this, ex,
"Detaching the FrozenSyBackgroundPanelPainter");
}
}
