/// <summary>
/// Defines a target control for the drag and drop operation.
/// </summary>
/// <typeparam name="TControl">The type of the control to drop on</typeparam>
/// <param name="target">The target control to drop on</param>
/// <param name="dragDrop">A function to handle the drop on the target control</param>
/// <returns></returns>
public DragOperation <T> To <TControl>(TControl target, Action <TControl, T> dragDrop) where TControl : Control
{
var handler = DragHandler <T> .CreateDefault();
handler.DragDrop = (value, _) =>
{
_previewFormController?.Stop(target, wasCancelled: false);
dragDrop?.Invoke(target, value);
};
return(To(target, handler));
}
/// <summary>
/// Attaches the required drag and drop events to a given target control.
/// </summary>
/// <param name="target">The target control to attach the events to</param>
/// <param name="handler">A handle class to link to the target control</param>
/// <returns></returns>
private DragOperation <T> To(Control target, DragHandler <T> handler)
{
target.AllowDrop = true;
_targets[target] = handler;
target.DragEnter += Target_DragEnter;
target.DragOver += Target_DragOver;
target.DragDrop += Target_DragDrop;
target.DragLeave += Target_DragLeave;
return(this);
}
