internal void Remove()
{
if (Parent is SplitContainer parent)
{
parent.Children.Remove(this);
if (parent.Children.Count == 1 && parent.Parent is SplitContainer splitContainerParent)
{
FrameworkElement child = parent.Children[0];
int parentIndex = splitContainerParent.Children.IndexOf(parent);
Size workingSize = SplitContainer.GetWorkingSize(parent);
parent.Children.Remove(child);
splitContainerParent.Children.RemoveAt(parentIndex);
splitContainerParent.Children.Insert(parentIndex, child);
SplitContainer.SetWorkingSize(child, workingSize);
return;
}
// Remove the entire split container if there are no more children inside
if (parent.Children.Count == 0)
{
parent.Remove();
}
}
if (Parent != null)
{
throw new InvalidOperationException();
}
}
private void OnDragCompleted(DragCompletedEventArgs e)
{
if (resizeData != null)
{
if (!e.Canceled)
{
Size beforeElementSize = SplitContainer.GetWorkingSize(BeforeElement);
Size afterElementSize = SplitContainer.GetWorkingSize(AfterElement);
double totalElementSize = beforeElementSize.Height + afterElementSize.Height;
double originalElementsTotalSize = this.resizeData.BeforeElementSize + resizeData.AfterElementSize;
if (Orientation == Orientation.Horizontal)
{
double delta = resizeData.PreviewAdorner.OffsetY / originalElementsTotalSize * totalElementSize;
SplitContainer.SetWorkingSize(BeforeElement, new Size(beforeElementSize.Width, beforeElementSize.Height + delta));
SplitContainer.SetWorkingSize(AfterElement, new Size(afterElementSize.Width, afterElementSize.Height - delta));
}
else
{
double delta = this.resizeData.PreviewAdorner.OffsetX / originalElementsTotalSize * totalElementSize;
SplitContainer.SetWorkingSize(BeforeElement, new Size(beforeElementSize.Width + delta, beforeElementSize.Height));
SplitContainer.SetWorkingSize(AfterElement, new Size(afterElementSize.Width - delta, afterElementSize.Height));
}
}
if (VisualTreeHelper.GetParent(resizeData.PreviewAdorner) is AdornerLayer adornerLayer)
{
adornerLayer.Remove(resizeData.PreviewAdorner);
}
resizeData = null;
}
}