ARCed.UI.DockPanel.AutoHideWindowControl.ISplitterDragSource C# (CSharp) Method

            void ISplitterDragSource.MoveSplitter(int offset)
            {
                Rectangle rectDockArea = this.DockPanel.DockArea;
                IDockContent content = this.ActiveContent;
                if (this.DockState == DockState.DockLeftAutoHide && rectDockArea.Width > 0)
                {
                    if (content.DockHandler.AutoHidePortion < 1)
                        content.DockHandler.AutoHidePortion += (offset) / (double)rectDockArea.Width;
                    else
                        content.DockHandler.AutoHidePortion = Width + offset;
                }
                else if (this.DockState == DockState.DockRightAutoHide && rectDockArea.Width > 0)
                {
                    if (content.DockHandler.AutoHidePortion < 1)
                        content.DockHandler.AutoHidePortion -= (offset) / (double)rectDockArea.Width;
                    else
                        content.DockHandler.AutoHidePortion = Width - offset;
                }
                else if (this.DockState == DockState.DockBottomAutoHide && rectDockArea.Height > 0)
                {
                    if (content.DockHandler.AutoHidePortion < 1)
                        content.DockHandler.AutoHidePortion -= (offset) / (double)rectDockArea.Height;
                    else
                        content.DockHandler.AutoHidePortion = Height - offset;
                }
                else if (this.DockState == DockState.DockTopAutoHide && rectDockArea.Height > 0)
                {
                    if (content.DockHandler.AutoHidePortion < 1)
                        content.DockHandler.AutoHidePortion += (offset) / (double)rectDockArea.Height;
                    else
                        content.DockHandler.AutoHidePortion = Height + offset;
                }
            }