/**
* When a IResourceList drag enters the link label, highlights it
* as a drop target.
*/
private void OnLinkDragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(IResourceList)))
{
_label.BackColor = SystemColors.Highlight;
_label.ForeColor = SystemColors.HighlightText;
IResourceList resList = (IResourceList)e.Data.GetData(typeof(IResourceList));
if (ResourceDragOver != null)
{
ResourceDragEventArgs args = new ResourceDragEventArgs(_resource, resList);
ResourceDragOver(this, args);
e.Effect = args.Effect;
}
else
{
if (Core.UIManager.CanDropResource(_resource, resList))
{
e.Effect = DragDropEffects.Link;
}
else
{
e.Effect = DragDropEffects.None;
}
}
}
}
/// <summary>
/// Handles the DnD <see cref="JetListView.DragOver"/> event from the underlying <see cref="JetListView"/>, and fires the own <see cref="ResourceDragOver"/> event for the external handlers (if none available, invokes the default handler).
/// </summary>
private void HandleDragOver(object sender, JetListViewDragEventArgs args)
{
try
{
IResource targetRes;
if (!CheckDragDropMode(args, out targetRes))
{
return; // Operation cancelled
}
// Call the outer handler for the drag-over operation
if ((ResourceDragOver != null) && (args.Data.GetDataPresent(typeof(IResourceList))))
{ // Call the custom handler
IResourceList dragResources = (IResourceList)args.Data.GetData(typeof(IResourceList));
ResourceDragEventArgs resourceDragEventArgs = new ResourceDragEventArgs(targetRes, dragResources);
ResourceDragOver(this, resourceDragEventArgs);
args.Effect = resourceDragEventArgs.Effect;
}
else
{ // No custom handler defined, invoke the default handler
if ((targetRes == RootResource) && (_rootResourceDropHandler != null)) // Empty/Root special handler
{
args.Effect = _rootResourceDropHandler.DragOver(targetRes, args.Data, args.AllowedEffect, args.KeyState);
}
else // Normal d'n'd handler
{
args.Effect = Core.UIManager.ProcessDragOver(targetRes, args.Data, args.AllowedEffect, args.KeyState, (args.Data.GetData(typeof(ResourceListView2)) == this));
}
}
}
catch (Exception ex)
{
Core.ReportException(ex, ExceptionReportFlags.AttachLog);
}
}
