Dialog should come to front on button click - wpf

Question

I am using Prism 5. To show dialog, I am using InteractionRequest. IsModel Property is set to False, so when I click on the main window (from where Dialogs is raised), Dialogs went in background. Now what I am trying to implement is that when I click button again, dialog should come to front again.
Here is my custom PopupWindowActionclass:
public class CustomDialogWindow : PopupWindowAction
{
private Window window;
protected override Window GetWindow(INotification notification) {
window = base.GetWindow(notification);
return window;
}
public static readonly DependencyProperty SetFocusProperty =
DependencyProperty.Register("SetFocus", typeof(bool),
typeof(CustomDialogWindow), null);
public bool SetFocus {
get { return (bool)GetValue(SetFocusProperty); }
set {
if (value) {
if (window != null) {
window.Activate();
window.Focus();
}
}
SetValue(SetFocusProperty, value);
}
}
}
Here is my XMAL side configuration:
<prism:InteractionRequestTrigger SourceObject="{Binding ContainerMoveSummaryRequest, Mode=OneWay}">
<popout:CustomDialogWindow x:Name="ContentSummaryGridAction"
IsModal="False" SetFocus="{Binding SetFocusOnContainerMoveSummary,Mode=TwoWay}">
<popout:CustomDialogWindow.WindowContent>
<dialogs:ContainerMoveSummaryDialog />
</popout:CustomDialogWindow.WindowContent>
</popout:CustomDialogWindow>
</prism:InteractionRequestTrigger>
The problem is even though binding is two way, On changing SetFocusOnContainerMoveSummary , SetFocus is not getting change.
Please let me know any solution for this.

Answer 1

The problem is even though binding is two way, on changing SetFocusOnContainerMoveSummary, SetFocus is not getting called
This is expected behavior, the the framework circumvents the helper property and uses the dependency property directly.
You need to set a callback on the dependency property and go from there:
public static readonly DependencyProperty SetFocusProperty =
DependencyProperty.Register(nameof(SetFocus),
typeof(bool),
typeof(CustomDialogWindow),
new PropertyMetaData( default(bool), OnSetFocusChanged);
private static void OnSetFocusChanged( DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs )
{
// get the window from dependencyObject (= the CustomDialogWindow instance) and call SetFocus
}