How do I darken all screen area and glow my opened window in WPF?

Question

In WPF, how do I darken all screen area when opening a new window?

Also after the window is closed, how do I revert the temporary effect?

You can check this link: http://stackoverflow.com/questions/5825527/gray-out-the-desktop-screen-except-a-selected-control-in-c-sharp/38495792#38495792 — swapnil saha, Jul 21 '16 at 05:48

score 28 · Answer 1 · edited Mar 20 '19 at 15:25

Here is my version, if you want gray out and blur the parent window:

private void btnOpenSettings_Click(object sender, RoutedEventArgs e)
    {
        // settings for the parent window
        // set the transparency to the half
        this.Opacity = 0.5;
        // blur the whole window
        this.Effect = new BlurEffect();

        // Set the options for the settings (child) window
        SettingsForm wdwSettings = new SettingsForm() 
        { 
            Owner = this,
            ShowInTaskbar = false,
            Topmost = true
        };

        // Open the child window
        wdwSettings.ShowDialog();

        //restore Opacity and remove blur after closing the child window
        this.Opacity = 1;
        this.Effect = null;
    }

it works great, but how can i go back to the original state once the ShowDialog() closes ? — Mugiwara, Apr 11 '18 at 23:51

score 14 · Accepted Answer · answered Dec 24 '10 at 15:44

You may create a background transparent window like this:

var darkwindow = new Window() {
                            Background = Brushes.Black,
                            Opacity = 0.4,
                            AllowsTransparency = true,
                            WindowStyle = WindowStyle.None,
                            WindowState = WindowState.Maximized,
                            Topmost = true
                        };
darkwindow.Show();
MessageBox.Show("Hello");
darkwindow.Close();

and replace MessageBox.Show("Hello"); with mywindow.ShowModal();. Possibly, you'll need to make mywindow always on top.

Edit

Don't use darkwindow.Hide() instead of Close().

thanks Mykola Bogdiuk. i create a dark and transparent border over the window and then i showed new window — hamed aj, Dec 28 '10 at 18:33

score 9 · Answer 3 · answered Jun 14 '17 at 09:44

9

Decrease the opacity of the current window,

For ex:

{
    this.Opacity = 0.5;//Decrease opacity
    MessageBox.Show("Ur Window Darken");
    this.Opacity = 100;//Reset the opacity
}

answered Jun 14 '17 at 09:44

Satish R

153
2
12

Simple solution – YoungStacker Oct 23 '17 at 22:05

score 0 · Answer 4 · answered Mar 13 '15 at 14:22

easiest way:use XAML pop-up as described below

<Popup x:Name="pop" IsOpen="False" >

</Popup>

For more details visit below link. http://www.c-sharpcorner.com/UploadFile/mahesh/using-xaml-popup-in-wpf/

After this to blur the main grid on eventhandler for the event which shows the pop-up,set the opacity as shown in below C# code

if (pop.IsOpen == false)    
{    
pop.IsOpen = true;    
grdMain.Opacity = 0.4;    
}    
else    
{    
pop.isopen=false;    
}

How do I darken all screen area and glow my opened window in WPF?

4 Answers4

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