Lock Position

[Maurício]

Hello

Is there a way to lock a radDiagramItem so the user won't be able to move it?

I've already disabled the item's dragging, but the user can still  change the position through Ctrl+Arrow Keys.

[Martin Ivanov]

Hello Maurício,

In order to stop the nudge operation (moving of the shapes through Ctrl+Arrow) you can subscribe for the diagram's PreviewKeyDown event and handle it if the shape should not be moved. Here is an example:

void diagram_PreviewKeyDown(object sender, KeyEventArgs e)
{
    bool isArrowKeyPressed = (e.Key == Key.Left) ||
        (e.Key == Key.Right) ||
        (e.Key == Key.Up) ||
        (e.Key == Key.Down);

    bool isCtrlDown = Keyboard.Modifiers == ModifierKeys.Control;

    if (isArrowKeyPressed && isCtrlDown)
    {
        var selectedItems = this.diagram.SelectedItems.OfType<IDiagramItem>();
        foreach (var item in selectedItems)
        {
            if (!item.IsDraggingEnabled)
            {
                e.Handled = true;
                return;
            }
        }
    }
}

Please try this and let me know if it helps.

Regards,
Martin
Telerik

 

 

[Maurício]

Hello Martin,

Thank you for your quick answer, it solved the problem.