So in UWP, we can use
ApplicationView.GetForCurrentView().SetPreferredMinSize(new Size(500, 500));
but
ApplicationView.GetForCurrentView();
returns null in WinUI 3. Is there a way to set the minimum size for a window
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3 Answers
The recommended solution, implemented on GitHub, is to use P/Invoke to call the window subclassing functions SetWindowSubclass and DefSubclassProc:
- Write a static WndProc method that handles
WM_GETMINMAXINFO, then forwards any other window messages to the original WndProc, viaDefSubclassProc(orCallWindowProcin the examples), although note the disadvantages). - Register your new WndProc via
SetWindowSubclass(orSetWindowLongPtrin the examples).
This comes from an issue on the XAML GitHub repo.
See this similar question and this other similar question for more info.
Comments
If anyone is wanting a modern solution, please add the following to your MainWindow():
OverlappedPresenter presenter = OverlappedPresenter.Create();
presenter.PreferredMinimumWidth = 300;
presenter.PreferredMinimumHeight = 400;
this.AppWindow.SetPresenter(presenter);
1 Comment
Teodor Mihail
Good solution. This is what I was looking for.....no pointers and kernel calls.
This way you don't need to recreate the OverlappedPresenter:
public MainWindow()
{
InitializeComponent();
if (this.AppWindow.Presenter is OverlappedPresenter presenter)
{
presenter.PreferredMinimumWidth = 300;
presenter.PreferredMinimumHeight = 400;
}
}