SelectAll command override not working properly

[ODB]

Hi,

My application it's using the diagram and i needed to override the SelectAll() command since i have a special shape in the diagram i dont want to get deleted. This is the first shape added to the diagram. So diagram.Items[0].

I've created the newbinding as follows

 var controlAllBinding = new CommandBinding(DiagramCommands.SelectAll, OnSelectAllExecute, OnCanSelect);            CommandManager.RegisterClassCommandBinding(typeof(PatternDiagram), controlAllBinding);

And the implementation

  private static void OnSelectAllExecute(object sender, ExecutedRoutedEventArgs e)
        {
            var diagram = (sender as PatternDiagram);
            diagram.SelectAll();
            (diagram.Items[0] as RadDiagramShape).IsSelected = false; //This works
            (diagram.Items[1] as RadDiagramShape).IsSelected = false; //This works
        }

        private static void OnCanSelect(object sender, CanExecuteRoutedEventArgs e)
        {
            e.canExecute = true;

            e.Handled = true;
        }

 

However there are a few other items that are not RadDiagramShapes but they inherited from it (ProductShape : RadDiagramShape), there are 2 kinds of this products, the ones that are enabled and the ones that are disabled using the IsEnabled property.

So:

- 2 RadDiagramShapes (Rectangles) [CANNOT BE DELETED]

- 3 ProductShapes (IsEnabled = true) [SHOULD BE DELETED AND SELECTABLE]

- 3 ProductShapes (IsEnabled = false) [SHOULD NOT BE DELETED]

If i try to use a foreach inside the diagram.Items or diagram.SelectedItems and after that i try to check which ones are disabled and when i get them i try to use IsSelected = false (because i dont want them to be selected or deleted) it is not working.

I've tried to modify CanSelect, SelectAll, CanDelete, DeleteExecute, PreviewSelectionChange, SelectionChange with no luck.

Is there maybe about the ProductShape class that is not working? The class only has 2 properties and a predefined style.

 

Is there any way i can achieve this?

Thanks

[Vladimir Stoyanov]

Hello,

Thank you for the provided code snippets.

Based on them I prepared a sample project which correctly excludes the disabled shapes from selection. Can you check it out and see how it differs from the setup at your side? If I am missing something, may I ask you to share what you are doing differently on your side? 

I am looking forward to your reply.

Regards,
Vladimir Stoyanov
Progress Telerik

[ODB]

Hello Vladimir,

Unfortunately the code you've provided is not working, not even in the project you share with me.

I'm using the latest build of Telerik UI for WPF.

You can find the implementation of the class here:

https://www.dropbox.com/s/1vvoqcwx5q4nmba/ProductShape.cs?dl=0

Do you think there is a workaround available?

Thanks

[Martin Ivanov]

Hello,

I think that the AllowDelete property of the shape might work in your scenario. Can you try setting the property to False on the shapes that you don't want to delete and let me know how it goes? This way you won't need to handle the SelectAll command.

Regards,
Martin Ivanov
Progress Telerik

[ODB]

This does not work since it prevents all shapes from being deleted (Select All + Delete) however it does not remove the disabled ones (or any...)

any other workaround?

Thanks

[Martin Ivanov]

Hello,

The AllowDelete property is available also in the RadDiagramShape class so you can set it per shape. For example:

<telerik:RadDiagramShape AllowDelete="False" IsEnabled="False" />

You can even bind AllowDelete to IsEnabled using the following code:

<telerik:RadDiagramShape AllowDelete="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsEnabled}" IsEnabled="False" />

Regards,
Martin Ivanov
Progress Telerik