/// <inheritdoc/>
HRESULT IDropTarget.DragLeave()
{
System.Diagnostics.Debug.WriteLine("IDropTarget.DragLeave");
DragLeave?.Invoke(this, EventArgs.Empty);
lastDataObject = null;
return(HRESULT.S_OK);
}
private void Target_Drop(object s, DragEventArgs e)
{
if (IsInitialized())
{
if (IsDragging)
{
e.Handled = true;
if (e.Data.GetDataPresent(Name))
{
DropEventArgs ea = new DropEventArgs()
{
Package = e.Data.GetData(Name),
Source = currentSource
};
// Invoke the CanDrop event again to ask the target if we're allowed to drop
CanDrop.GetInvocationList().Where(d => d.Target == s).First().DynamicInvoke(ea);
if (ea.AllowDrop)
{
Drop.GetInvocationList().Where(d => d.Target == s).First().DynamicInvoke(ea);
// Also fire DragLeave since the system won't do this for us.
DragLeave.GetInvocationList().Where(d => d.Target == s).First().DynamicInvoke();
}
}
}
}
}
private async void Grid_Drop(object sender, DragEventArgs e)
{
DragLeave.Begin();
if (e.DataView.Contains(StandardDataFormats.StorageItems))
{
AddAttachement((await e.DataView.GetStorageItemsAsync()).First() as StorageFile);
}
}
internal protected void RaiseDragEvent(string ev, DragEventArgs e)
{
switch (ev)
{
case "DragEnter":
DragEnter?.Invoke(this, e);
break;
case "DragOver":
DragOver?.Invoke(this, e);
break;
case "DragLeave":
DragLeave?.Invoke(this, e);
break;
case "Drop":
Drop?.Invoke(this, e);
break;
case "PreviewDragEnter":
PreviewDragEnter?.Invoke(this, e);
break;
case "PreviewDragOver":
PreviewDragOver?.Invoke(this, e);
break;
case "PreviewDragLeave":
PreviewDragLeave?.Invoke(this, e);
break;
case "PreviewDrop":
PreviewDrop?.Invoke(this, e);
break;
default:
break;
}
}
private void Target_DragLeave(object s, DragEventArgs e)
{
if (IsInitialized())
{
if (IsDragging)
{
e.Handled = true;
DropEventArgs ea = new DropEventArgs()
{
Package = e.Data.GetData(Name),
Source = currentSource
};
CanDrop.GetInvocationList().Where(d => d.Target == s).First().DynamicInvoke(ea);
if (ea.AllowDrop)
{
DragLeave.GetInvocationList().Where(d => d.Target == s).First().DynamicInvoke();
}
}
}
}
public void SendDragLeave(DragEventArgs args)
{
DragLeaveCommand?.Execute(DragLeaveCommandParameter);
DragLeave?.Invoke(this, args);
}
/// <summary>
/// Event handler for <see cref="DragLeave"/> event callback.
/// </summary>
/// <param name="eventArgs">Supplies information about an drag event that is being raised.</param>
/// <returns>A task that represents the asynchronous operation.</returns>
protected virtual Task OnDragLeaveHandler(DragEventArgs eventArgs)
{
return(DragLeave.InvokeAsync(eventArgs));
}
private void Edit_DragLeave(object sender, EventArgs e)
{
DragLeave?.Invoke(sender, e);
}
private void rectangle_DragLeave(object sender, DragEventArgs e)
{
DragLeave.Begin();
}
protected void OnDragLeave(UIDragEventArgs args)
{
Console.WriteLine($"Leave {Data}");
isUnderDragItem = false;
DragLeave?.Invoke(Data);
}
public void OnDragLeave(EventArgs e) => DragLeave?.Invoke(e);
void treeView_DragLeave(object sender, EventArgs e)
{
DragLeave?.Invoke(this, e);
}
internal void HandleDragLeave(object sender, EventArgs e)
{
DragLeave?.Invoke(sender, e);
}
protected virtual void OnDragLeave(EventArgs e)
{
DragLeave?.Invoke(this, e);
}
