CODEWITHSUNDEEP
wpfxamlheight
Nam G VU
Nam G VU

Reputation: 35374

How to get the height of the title bar of the main application windows?

I'm using prism to load views to region. The problem is the loaded view overlapped the title bar of the main windows - the bar contains caption, close/minimize/maximize buttons. How can I get the title bar's height? Prefer to get it right in the xaml codes.

Upvotes: 6

Views: 14288

Answers (3)

Indinfer
Indinfer

Reputation: 97

I think you can do this since .NET Framework 4.5.

Reference: https://learn.microsoft.com/en-us/dotnet/api/system.windows.shell.windowchrome.captionheight?view=windowsdesktop-7.0#system-windows-shell-windowchrome-captionheight

Here is what you can do:

double title_height = (new WindowChrome()).CaptionHeight;

Upvotes: 0

l33t
l33t

Reputation: 19937

SystemParameters.WindowCaptionHeight is in pixels whereas WPF needs screen cordinates. You have to convert it!

<Grid>
    <Grid.Resources>
        <wpfApp1:Pixel2ScreenConverter x:Key="Pixel2ScreenConverter" />
    </Grid.Resources>
    <YourView Height="{Binding Source={x:Static SystemParameters.WindowCaptionHeight},Converter={StaticResource Pixel2ScreenConverter}}" />
</Grid>

aa

public class Pixel2ScreenConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        double pixels = (double) value;
        bool horizontal = Equals(parameter, true);

        double points = 0d;

        // NOTE: Ideally, we would get the source from a visual:
        // source = PresentationSource.FromVisual(visual);
        //
        using (var source = new HwndSource(new HwndSourceParameters()))
        {
            var matrix = source.CompositionTarget?.TransformToDevice;
            if (matrix.HasValue)
            {
                points = pixels * (horizontal ? matrix.Value.M11 : matrix.Value.M22);
            }
        }

        return points;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

Upvotes: 1

Nam G VU
Nam G VU

Reputation: 35374

After a while, I figure it out:

<Window xmlns:local="clr-namespace:System.Windows;assembly=PresentationFramework">
  <YourView Height="{x:Static local:SystemParameters.WindowCaptionHeight}" />
</Window>

Hope that helps!

Upvotes: 17

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