Using Databinding in DependencyProperty

Question

I created a class that inherits from Window and has got a DependencyProperty called TitlebarContent.

public FrameworkElement TitleBarContent
{
    get { return (FrameworkElement)GetValue(TitleBarContentProperty); }
    set { SetValue(TitleBarContentProperty, value); }
}

// Using a DependencyProperty as the backing store for TitleBarContent.  This enables animation, styling, binding, etc...
public static readonly DependencyProperty TitleBarContentProperty =
    DependencyProperty.Register("TitleBarContent", typeof(FrameworkElement), typeof(tkWindowControl), new PropertyMetadata(default(FrameworkElement)));

Inside a ResourceDictionary for Styles i add a ContentControlfor this property. Now I'd like to use the new 'WindowObject' in another application and access the new TitlebarContentProperty. I can see the items inside my Titlebar and I'm able to move the Window, resize it and more. But I cannot bind to these items. For example I'd like to add a Helpbutton inside the Titlebar. The Button is shown, but i can't click it.

    <tk:tkWindowControl.TitleBarContent>
        <DockPanel Grid.Row="0"  FlowDirection="LeftToRight">
            <Button Content="Exit" Command="{Binding ExitApplicationCommand}" Height="60" Width="60" Background="Red"/>
        </DockPanel>
    </tk:tkWindowControl.TitleBarContent>

My DependencyProperty is a typeof(FrameWorkElement) because i like to add several Buttons to the Titlebar.

Is it possible to use my Bindings in this way?

If your button shows up in the UI then I would expect all you need to do is have a public iCommand property ExitApplicationCommand in the datacontext of your window. What do you have at the moment? — Andy
– Andy, Commented Apr 17, 2019 at 9:31
The Background is already done. I tried the Binding by placing the button in a normal Grid. Everything works. But used in the Titlebarcontent the Button has no IsMouseOverEffect and the Binding doesn't work anymore. — Romox
– Romox, Commented Apr 17, 2019 at 10:38

mm8 · Accepted Answer · 2019-04-17 12:17:53Z

1

Set the WindowChrome.IsHitTestVisibleInChrome attached property of the Button or the parent element to true:

<Button Content="Exit" WindowChrome.IsHitTestVisibleInChrome="True" ... />

Alternatively, you should decrease the value of the CaptionHeight property of the WindowChrome.

answered Apr 17, 2019 at 12:17

mm8

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1 Comment

Romox Over a year ago

And again you helped me @mm8. Now i'm done with my UI. Thank you

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