How to Replace Application.DoEvents() in WPF for Smooth UI Updates?

Replace Application.DoEvents() in WPF for smooth UI updates

While Application.DoEvents() existed in older versions of .NET to allow threads to yield to the message pump, it is no longer directly available in .NET 4 and above (including WPF applications). This can cause performance issues, especially when dealing with GUI updates.

In WPF, the alternative to Application.DoEvents() is to call the Dispatcher.Invoke method of the current Application object. This allows control to be ceded to the message pump, ensuring that any pending UI updates are processed. Here is an example implementation:

<code class="language-csharp">public static void DoEvents()
{
    Application.Current.Dispatcher.Invoke(DispatcherPriority.Background,
                                          new Action(delegate { }));
}</code>

In order to use it in the provided code, add the following line immediately after scaling the canvas:

<code class="language-csharp">DoEvents();</code>

This will ensure that the updated button position is reflected in subsequent output, thus resolving the differences observed in the original code. Then the modified output will be:

<code>scale 1, location: 296;315
scale 2, location: 296;315

scale 2, location: 346;365
scale 3, location: 346;365

scale 3, location: 396;415
scale 4, location: 396;415</code>

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