private Rectangle GetLogicalTabStripRectangle(DockState dockState, bool transformed)
        {
            if (!DockHelper.IsDockStateAutoHide(dockState))
            {
                return(Rectangle.Empty);
            }

            int leftPanes   = GetPanes(DockState.DockLeftAutoHide).Count;
            int rightPanes  = GetPanes(DockState.DockRightAutoHide).Count;
            int topPanes    = GetPanes(DockState.DockTopAutoHide).Count;
            int bottomPanes = GetPanes(DockState.DockBottomAutoHide).Count;

            int x, y, width, height;

            height = MeasureHeight();
            if (dockState == DockState.DockLeftAutoHide && leftPanes > 0)
            {
                x     = 0;
                y     = (topPanes == 0) ? 0 : height;
                width = Height - (topPanes == 0 ? 0 : height) - (bottomPanes == 0 ? 0 : height);
            }
            else if (dockState == DockState.DockRightAutoHide && rightPanes > 0)
            {
                x = Width - height;
                if (leftPanes != 0 && x < height)
                {
                    x = height;
                }
                y     = (topPanes == 0) ? 0 : height;
                width = Height - (topPanes == 0 ? 0 : height) - (bottomPanes == 0 ? 0 : height);
            }
            else if (dockState == DockState.DockTopAutoHide && topPanes > 0)
            {
                x     = leftPanes == 0 ? 0 : height;
                y     = 0;
                width = Width - (leftPanes == 0 ? 0 : height) - (rightPanes == 0 ? 0 : height);
            }
            else if (dockState == DockState.DockBottomAutoHide && bottomPanes > 0)
            {
                x = leftPanes == 0 ? 0 : height;
                y = Height - height;
                if (topPanes != 0 && y < height)
                {
                    y = height;
                }
                width = Width - (leftPanes == 0 ? 0 : height) - (rightPanes == 0 ? 0 : height);
            }
            else
            {
                return(Rectangle.Empty);
            }

            if (width == 0 || height == 0)
            {
                return(Rectangle.Empty);
            }

            var rect = new Rectangle(x, y, width, height);

            return(transformed ? GetTransformedRectangle(dockState, rect) : rect);
        }
        internal void SetDockState(bool isHidden, DockState visibleState, DockPane oldPane)
        {
            if (IsSuspendSetDockState)
            {
                return;
            }

            if (DockPanel == null && visibleState != DockState.Unknown)
            {
                throw new InvalidOperationException(Strings.DockContentHandler_SetDockState_NullPanel);
            }

            if (visibleState == DockState.Hidden || (visibleState != DockState.Unknown && !IsDockStateValid(visibleState)))
            {
                throw new InvalidOperationException(Strings.DockContentHandler_SetDockState_InvalidState);
            }

            DockPanel dockPanel = DockPanel;

            if (dockPanel != null)
            {
                dockPanel.SuspendLayout(true);
            }

            SuspendSetDockState();

            DockState oldDockState = DockState;

            if (m_isHidden != isHidden || oldDockState == DockState.Unknown)
            {
                m_isHidden = isHidden;
            }
            m_visibleState = visibleState;
            m_dockState    = isHidden ? DockState.Hidden : visibleState;

            //Remove hidden content (shown content is added last so removal is done first to invert the operation)
            bool hidingContent = (DockState == DockState.Hidden) || (DockState == DockState.Unknown) || DockHelper.IsDockStateAutoHide(DockState);

            if (PatchController.EnableContentOrderFix == true && oldDockState != DockState)
            {
                if (hidingContent)
                {
                    if (!Win32Helper.IsRunningOnMono)
                    {
                        DockPanel.ContentFocusManager.RemoveFromList(Content);
                    }
                }
            }

            if (visibleState == DockState.Unknown)
            {
                Pane = null;
            }
            else
            {
                m_isFloat = (m_visibleState == DockState.Float);

                if (Pane == null)
                {
                    Pane = DockPanel.Theme.Extender.DockPaneFactory.CreateDockPane(Content, visibleState, true);
                }
                else if (Pane.DockState != visibleState)
                {
                    if (Pane.Contents.Count == 1)
                    {
                        Pane.SetDockState(visibleState);
                    }
                    else
                    {
                        Pane = DockPanel.Theme.Extender.DockPaneFactory.CreateDockPane(Content, visibleState, true);
                    }
                }
            }

            if (Form.ContainsFocus)
            {
                if (DockState == DockState.Hidden || DockState == DockState.Unknown)
                {
                    if (!Win32Helper.IsRunningOnMono)
                    {
                        DockPanel.ContentFocusManager.GiveUpFocus(Content);
                    }
                }
            }

            SetPaneAndVisible(Pane);

            if (oldPane != null && !oldPane.IsDisposed && oldDockState == oldPane.DockState)
            {
                RefreshDockPane(oldPane);
            }

            if (Pane != null && DockState == Pane.DockState)
            {
                if ((Pane != oldPane) ||
                    (Pane == oldPane && oldDockState != oldPane.DockState))
                {
                    // Avoid early refresh of hidden AutoHide panes
                    if ((Pane.DockWindow == null || Pane.DockWindow.Visible || Pane.IsHidden) && !Pane.IsAutoHide)
                    {
                        RefreshDockPane(Pane);
                    }
                }
            }

            if (oldDockState != DockState)
            {
                if (PatchController.EnableContentOrderFix == true)
                {
                    //Add content that is being shown
                    if (!hidingContent)
                    {
                        if (!Win32Helper.IsRunningOnMono)
                        {
                            DockPanel.ContentFocusManager.AddToList(Content);
                        }
                    }
                }
                else
                {
                    if (DockState == DockState.Hidden || DockState == DockState.Unknown ||
                        DockHelper.IsDockStateAutoHide(DockState))
                    {
                        if (!Win32Helper.IsRunningOnMono)
                        {
                            DockPanel.ContentFocusManager.RemoveFromList(Content);
                        }
                    }
                    else if (!Win32Helper.IsRunningOnMono)
                    {
                        DockPanel.ContentFocusManager.AddToList(Content);
                    }
                }

                ResetAutoHidePortion(oldDockState, DockState);
                OnDockStateChanged(EventArgs.Empty);
            }

            ResumeSetDockState();

            if (dockPanel != null)
            {
                dockPanel.ResumeLayout(true, true);
            }
        }