[WPF] Transparent Form does not work anymore since 2.10.0

[princessdaphie]

Describe the bug
I've been developing my UI using 2.8 at first and then 2.9, and the well-known WPF trick of using the wpf window handle to allow transparency has been working great, but since 2.10.0, all I can get is half-transparency.

##Code that Demonstrates the Problem

wpfWindow.AllowsTransparency = true;
wpfWindow.Background = System.Windows.Media.Brushes.Transparent;
wpfWindow.ShowActivated = ActivateOnShow;
wpfWindow.Topmost = Topmost;

Specifications

• Eto Version: 2.10.0, 2.10.1
• Platform(s): WPF
• Operating System(s): Win10

[cwensley]

This could be fighting with the built-in transparency functionality in 2.10.

You should now be able to just set etoWindow.BackgroundColor = Colors.Transparent to get a transparent window.

As for ShowActivated and Topmost, both of those are also exposed in Eto directly.

[princessdaphie]

Thank you for your reply, I didn't know the transparency was now supposed to be built-in 2.10 now.

However, I tried removing the custom styling code, and using the built-in properties to make my form transparent, and here's what happens:

It's basically the same thing that happened when I was using the custom styling code.

The code I used to create the form:

var popup = new Form
{
    Size = new Size(200, 300),
    Title = "Popup Panel Dialog",
    Location = new Point((int)Mouse.Position.X, (int)Mouse.Position.Y),
    BackgroundColor = Colors.Transparent,
    WindowStyle = WindowStyle.None,
    MovableByWindowBackground = true,
    ShowInTaskbar = false,
    Resizable = false,
    Topmost = true,
    ShowActivated = true,
};

[cwensley]

Hm, you shouldn't be getting that when not using WindowStyle.None, but only when using other styles. Something definitely is wrong. Thanks for reporting the issue! I'll look into it.

[princessdaphie]

Cool, I await the next version with this fix with great anticipation!