CairoExplorer.DockPanelSplitter.ParentSizeChanged C# (CSharp) Метод

        private void ParentSizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (!ProportionalResize) return;

            DockPanel dp = Parent as DockPanel;
            if (dp == null) return;

            double sx = dp.ActualWidth / previousParentWidth;
            double sy = dp.ActualHeight / previousParentHeight;

            if (!double.IsInfinity(sx))
                SetTargetWidth(element.Width * sx);
            if (!double.IsInfinity(sy))
                SetTargetHeight(element.Height * sy);

            previousParentWidth = dp.ActualWidth;
            previousParentHeight = dp.ActualHeight;
        }