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

Question

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.

Miscreance

Answer 1

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!

Miscreance

On my Intel Core i7-6700 CPU@ 3.40GHz running Windows 10 Pro 64-Bit (Version 10.0.15063) and Visual Studio 2015 Enterprise (Version 14.0.25431.01 Update 3) targeting .NET Framework 4.5.2 with ~16 GB RAM free and ~110 GB HD free, System.Windows.SystemParameters.WindowCaptionHeight returned 23 vs. the 39 that I verified via the Debugger. My XAML has as its root Element a Window with 0's for Margin, BorderThickness and Padding and its Content Element is a DockPanel with 0's for Margin. The DockPanel's ActualHeight was 39 < than the Window's. – Sarchet

Exactly the same here. – Commerce

Please try this instead! – Conservatory

Answer 2

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();
    }
}

Conservatory

Answer 3

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;

Magnoliamagnoliaceous