detect open windows and bring to front, and open all window in in front.

Question

I am making an app for windows and mac,

I made a ribbon menu.

I have a dictionary, where I have a Button Image associated with a particular page.

public partial class MainViewModel : ObservableObject {

    Dictionary<string, Page> _items = new() {

        {"mario.png", new Page1()},
        {"dotnet_bot.png", new Page_2()},
    };

    [RelayCommand]
    public void MenuItemSelected(object obj) {

        var imageButton = obj as ImageButton;

        var fileImageSource = imageButton?.Source as FileImageSource;

        var name = fileImageSource?.File;

        WindowHelper.CreateWindow(_items[name!], 300, 300);
    }

Also I declared a method to create new Windows

public static class WindowHelper {

    public static void CreateWindow(Page view, double height, double width, double x = 0, double y = 0) {

        var displayInfo = DeviceDisplay.MainDisplayInfo;

        if (height == 0 && width == 0) {

            width = displayInfo.Width;
            height = displayInfo.Height;
        }

        var newWindow = new Window() {

            Page = view,

            Height = height,

            Width = width,

            X = x,

            Y = y,

        };

        Application.Current?.OpenWindow(newWindow);
    }

this work as expected

but when I open other windows, that window go to the back

I want all my windows visible at the sati time (like in windows forms)

also, if window is open already, just bring it to the front, so don't open a new instance.

Answer 1

Hello,

if window is open already, just bring it to the front, so don't open a new instance.

For windows, Microsoft.Maui.Controls.Window do not have Activate() method in MAUI.

When you create a window events.AddWindows(windows => windows.OnWindowCreated will be execute. And you can get the MauiWinUIWindow from the window. MauiWinUIWindow have Activate method. You can get the needed window by the title. Then set it the public static MauiWinUIWindow secondWindow, here is my MauiProgram.cs code.

#if WINDOWS
        public static MauiWinUIWindow secondWindow;
#endif
        public static MauiApp CreateMauiApp()
        {
                 builder
                .UseMauiApp<App>()
                .ConfigureLifecycleEvents(events =>
                {
#if WINDOWS
                    events.AddWindows(windows => windows.OnWindowCreated(window => {
                        var mauiWinUIWindow = window as MauiWinUIWindow;
                        if(mauiWinUIWindow.Title== "newWIndow") {
                            secondWindow= mauiWinUIWindow;
                        }
                    }));
#endif
                })
         }

You need to add a Title for your newWindow.

 var SecondWindowPage = new Window()
        {
           
            Title ="newWIndow",

            Page = view,

            Height = height,

            Width = width,

            X = x,

            Y = y,


       };

Then, you need to add a flag to mark whether the window is open. If you want to make the window to the front, you can call MauiProgram.secondWindow.Activate(); directly.

  if (SecondWindowCreated == false)

        {

            SecondWindow = SecondWindowPage;

            SecondWindow.Created += (s, e) => { SecondWindowCreated = true; };

            SecondWindow.Destroying += (s, e) => { SecondWindowCreated = false; };

            Application.Current.OpenWindow(SecondWindow);

        }

        else

        {
#if WINDOWS
                MauiProgram.secondWindow.Activate();
#endif
        }

Best Regards,

Leon Lu

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