Identifying Cut, Copy, or Paste Operations in RadVirtualGrid for WinForms

Environment

Product Version	Product	Author
2024.4.1113	RadVirtualGrid for WinForms	Dinko Krastev

Description

In RadVirtualGrid for WinForms, using Copy or Cut option from the default context menu triggers the "Copying" event handler. This article demonstrates how to differentiate whether the Copy, Paste, or Cut operation is executed.

This knowledge-base article also answers the following questions:

• How can I tell if a cut or copy operation triggered the Copying event in RadVirtualGrid?
• Is there a way to detect the type of clipboard operation (cut or copy) in RadVirtualGrid?
• How do I customize the input behavior in RadVirtualGrid to identify clipboard operations?

Solution

To identify which clipboard operation is executed, create a custom class that inherits from VirtualGridInputBehavior and override the HandleUnhandledKeys method. This approach allows you to set a flag indicating the type of operation (cut, copy, paste, select all).

Here is an implementation example:

1. Create a custom VirtualGridInputBehavior class:

    public class CustomVirtualGridInputBehavior : VirtualGridInputBehavior
    {
        public bool IsCutOperation { get; private set; }

        public CustomVirtualGridInputBehavior(RadVirtualGridElement gridElement) : base(gridElement)
        {
        }

        protected override bool HandleUnhandledKeys(KeyEventArgs keys)
        {
            IsCutOperation = false; // Reset flag

            if (keys.KeyCode == Keys.X && keys.Control)
            {
                IsCutOperation = true; // Set flag for cut operation
                return this.GridElement.CutSelection();
            }

            if (keys.KeyCode == Keys.C && keys.Control)
            {
                return this.GridElement.CopySelection();
            }

            // Handle other key combinations as needed

            return false;
        }
    }

1. In the following example, we can handle the Copying event and check whether the Cut or Copying operation is triggered.

    public Form1()
    {
        InitializeComponent();
        var customBehavior = new CustomVirtualGridInputBehavior(this.radVirtualGrid1.VirtualGridElement);
        this.radVirtualGrid1.VirtualGridElement.InputBehavior = customBehavior;
        this.radVirtualGrid1.Copying += (sender, e) =>
        {
            if (customBehavior.IsCutOperation)
            {
                // Handle cut operation
            }
            else
            {
                // Handle copy operation
            }
        };
    }

This approach allows you to raise a flag in the HandleUnhandledKeys method for the specific cut operation and check this flag in the "Copying" event to determine the operation type.

See Also

• RadVirtualGrid Input Behavior Documentation
• RadVirtualGrid Overview