internal TabCollection(DockPane pane)
 {
     DockPane = pane;
 }
 protected virtual Pane CreatePane(DockPane dockPane)
 {
     return(new Pane(dockPane));
 }
                private void RefreshChanges()
                {
                    Region    region       = new Region(Rectangle.Empty);
                    Rectangle rectDockArea = FullPanelEdge ? DockPanel.DockArea : DockPanel.DocumentWindowBounds;

                    rectDockArea = RectangleToClient(DockPanel.RectangleToScreen(rectDockArea));
                    if (ShouldPanelIndicatorVisible(DockState.DockLeft))
                    {
                        PanelLeft.Location = new Point(rectDockArea.X + _PanelIndicatorMargin, rectDockArea.Y + (rectDockArea.Height - PanelRight.Height) / 2);
                        PanelLeft.Visible  = true;
                        region.Union(PanelLeft.Bounds);
                    }
                    else
                    {
                        PanelLeft.Visible = false;
                    }

                    if (ShouldPanelIndicatorVisible(DockState.DockRight))
                    {
                        PanelRight.Location = new Point(rectDockArea.X + rectDockArea.Width - PanelRight.Width - _PanelIndicatorMargin, rectDockArea.Y + (rectDockArea.Height - PanelRight.Height) / 2);
                        PanelRight.Visible  = true;
                        region.Union(PanelRight.Bounds);
                    }
                    else
                    {
                        PanelRight.Visible = false;
                    }

                    if (ShouldPanelIndicatorVisible(DockState.DockTop))
                    {
                        PanelTop.Location = new Point(rectDockArea.X + (rectDockArea.Width - PanelTop.Width) / 2, rectDockArea.Y + _PanelIndicatorMargin);
                        PanelTop.Visible  = true;
                        region.Union(PanelTop.Bounds);
                    }
                    else
                    {
                        PanelTop.Visible = false;
                    }

                    if (ShouldPanelIndicatorVisible(DockState.DockBottom))
                    {
                        PanelBottom.Location = new Point(rectDockArea.X + (rectDockArea.Width - PanelBottom.Width) / 2, rectDockArea.Y + rectDockArea.Height - PanelBottom.Height - _PanelIndicatorMargin);
                        PanelBottom.Visible  = true;
                        region.Union(PanelBottom.Bounds);
                    }
                    else
                    {
                        PanelBottom.Visible = false;
                    }

                    if (ShouldPanelIndicatorVisible(DockState.Document))
                    {
                        Rectangle rectDocumentWindow = RectangleToClient(DockPanel.RectangleToScreen(DockPanel.DocumentWindowBounds));
                        PanelFill.Location = new Point(rectDocumentWindow.X + (rectDocumentWindow.Width - PanelFill.Width) / 2, rectDocumentWindow.Y + (rectDocumentWindow.Height - PanelFill.Height) / 2);
                        PanelFill.Visible  = true;
                        region.Union(PanelFill.Bounds);
                    }
                    else
                    {
                        PanelFill.Visible = false;
                    }

                    if (ShouldPaneDiamondVisible())
                    {
                        Rectangle rect = RectangleToClient(DockPane.RectangleToScreen(DockPane.ClientRectangle));
                        PaneDiamond.Location = new Point(rect.Left + (rect.Width - PaneDiamond.Width) / 2, rect.Top + (rect.Height - PaneDiamond.Height) / 2);
                        PaneDiamond.Visible  = true;
                        using (GraphicsPath graphicsPath = PaneDiamond.DisplayingGraphicsPath.Clone() as GraphicsPath)
                        {
                            Point[] pts =
                            {
                                new Point(PaneDiamond.Left,  PaneDiamond.Top),
                                new Point(PaneDiamond.Right, PaneDiamond.Top),
                                new Point(PaneDiamond.Left,  PaneDiamond.Bottom)
                            };
                            using (Matrix matrix = new Matrix(PaneDiamond.ClientRectangle, pts))
                            {
                                graphicsPath.Transform(matrix);
                            }

                            region.Union(graphicsPath);
                        }
                    }
                    else
                    {
                        PaneDiamond.Visible = false;
                    }

                    Region = region;
                }
 protected internal Pane(DockPane dockPane)
 {
     m_dockPane = dockPane;
 }
            public static void LoadFromXml(DockPanel dockPanel, Stream stream, DeserializeDockContent deserializeContent, bool closeStream)
            {
                if (dockPanel.Contents.Count != 0)
                {
                    throw new InvalidOperationException(Strings.DockPanel_LoadFromXml_AlreadyInitialized);
                }

                DockPanelStruct dockPanelStruct;

                ContentStruct[]     contents;
                PaneStruct[]        panes;
                DockWindowStruct[]  dockWindows;
                FloatWindowStruct[] floatWindows;
                using (var xmlIn = new XmlTextReader(stream)
                {
                    WhitespaceHandling = WhitespaceHandling.None
                })
                {
                    xmlIn.MoveToContent();

                    while (!xmlIn.Name.Equals("DockPanel"))
                    {
                        if (!MoveToNextElement(xmlIn))
                        {
                            throw new ArgumentException(Strings.DockPanel_LoadFromXml_InvalidXmlFormat);
                        }
                    }

                    string formatVersion = xmlIn.GetAttribute("FormatVersion");
                    if (!IsFormatVersionValid(formatVersion))
                    {
                        throw new ArgumentException(Strings.DockPanel_LoadFromXml_InvalidFormatVersion);
                    }

                    dockPanelStruct = new DockPanelStruct();
                    dockPanelStruct.DockLeftPortion         = Convert.ToDouble(xmlIn.GetAttribute("DockLeftPortion"), CultureInfo.InvariantCulture);
                    dockPanelStruct.DockRightPortion        = Convert.ToDouble(xmlIn.GetAttribute("DockRightPortion"), CultureInfo.InvariantCulture);
                    dockPanelStruct.DockTopPortion          = Convert.ToDouble(xmlIn.GetAttribute("DockTopPortion"), CultureInfo.InvariantCulture);
                    dockPanelStruct.DockBottomPortion       = Convert.ToDouble(xmlIn.GetAttribute("DockBottomPortion"), CultureInfo.InvariantCulture);
                    dockPanelStruct.IndexActiveDocumentPane = Convert.ToInt32(xmlIn.GetAttribute("ActiveDocumentPane"), CultureInfo.InvariantCulture);
                    dockPanelStruct.IndexActivePane         = Convert.ToInt32(xmlIn.GetAttribute("ActivePane"), CultureInfo.InvariantCulture);

                    // Load Contents
                    MoveToNextElement(xmlIn);
                    if (xmlIn.Name != "Contents")
                    {
                        throw new ArgumentException(Strings.DockPanel_LoadFromXml_InvalidXmlFormat);
                    }
                    contents = LoadContents(xmlIn);

                    // Load Panes
                    if (xmlIn.Name != "Panes")
                    {
                        throw new ArgumentException(Strings.DockPanel_LoadFromXml_InvalidXmlFormat);
                    }
                    panes = LoadPanes(xmlIn);

                    // Load DockWindows
                    if (xmlIn.Name != "DockWindows")
                    {
                        throw new ArgumentException(Strings.DockPanel_LoadFromXml_InvalidXmlFormat);
                    }
                    dockWindows = LoadDockWindows(xmlIn, dockPanel);

                    // Load FloatWindows
                    if (xmlIn.Name != "FloatWindows")
                    {
                        throw new ArgumentException(Strings.DockPanel_LoadFromXml_InvalidXmlFormat);
                    }
                    floatWindows = LoadFloatWindows(xmlIn);

                    if (closeStream)
                    {
                        xmlIn.Close();
                    }
                }

                dockPanel.SuspendLayout(true);

                dockPanel.DockLeftPortion   = dockPanelStruct.DockLeftPortion;
                dockPanel.DockRightPortion  = dockPanelStruct.DockRightPortion;
                dockPanel.DockTopPortion    = dockPanelStruct.DockTopPortion;
                dockPanel.DockBottomPortion = dockPanelStruct.DockBottomPortion;

                // Set DockWindow ZOrders
                int prevMaxDockWindowZOrder = int.MaxValue;

                for (int i = 0; i < dockWindows.Length; i++)
                {
                    int maxDockWindowZOrder = -1;
                    int index = -1;
                    for (int j = 0; j < dockWindows.Length; j++)
                    {
                        if (dockWindows[j].ZOrderIndex > maxDockWindowZOrder && dockWindows[j].ZOrderIndex < prevMaxDockWindowZOrder)
                        {
                            maxDockWindowZOrder = dockWindows[j].ZOrderIndex;
                            index = j;
                        }
                    }

                    dockPanel.DockWindows[dockWindows[index].DockState].BringToFront();
                    prevMaxDockWindowZOrder = maxDockWindowZOrder;
                }

                // Create Contents
                for (int i = 0; i < contents.Length; i++)
                {
                    IDockContent content = deserializeContent(contents[i].PersistString);
                    if (content == null)
                    {
                        content = new DummyContent();
                    }
                    content.DockHandler.DockPanel       = dockPanel;
                    content.DockHandler.AutoHidePortion = contents[i].AutoHidePortion;
                    content.DockHandler.IsHidden        = true;
                    content.DockHandler.IsFloat         = contents[i].IsFloat;
                }

                // Create panes
                for (int i = 0; i < panes.Length; i++)
                {
                    DockPane pane = null;
                    for (int j = 0; j < panes[i].IndexContents.Length; j++)
                    {
                        IDockContent content = dockPanel.Contents[panes[i].IndexContents[j]];
                        if (j == 0)
                        {
                            pane = dockPanel.Theme.Extender.DockPaneFactory.CreateDockPane(content, panes[i].DockState, false);
                        }
                        else if (panes[i].DockState == DockState.Float)
                        {
                            content.DockHandler.FloatPane = pane;
                        }
                        else
                        {
                            content.DockHandler.PanelPane = pane;
                        }
                    }
                }

                // Assign Panes to DockWindows
                for (int i = 0; i < dockWindows.Length; i++)
                {
                    for (int j = 0; j < dockWindows[i].NestedPanes.Length; j++)
                    {
                        DockWindow    dw            = dockPanel.DockWindows[dockWindows[i].DockState];
                        int           indexPane     = dockWindows[i].NestedPanes[j].IndexPane;
                        DockPane      pane          = dockPanel.Panes[indexPane];
                        int           indexPrevPane = dockWindows[i].NestedPanes[j].IndexPrevPane;
                        DockPane      prevPane      = (indexPrevPane == -1) ? dw.NestedPanes.GetDefaultPreviousPane(pane) : dockPanel.Panes[indexPrevPane];
                        DockAlignment alignment     = dockWindows[i].NestedPanes[j].Alignment;
                        double        proportion    = dockWindows[i].NestedPanes[j].Proportion;
                        pane.DockTo(dw, prevPane, alignment, proportion);
                        if (panes[indexPane].DockState == dw.DockState)
                        {
                            panes[indexPane].ZOrderIndex = dockWindows[i].ZOrderIndex;
                        }
                    }
                }

                // Create float windows
                for (int i = 0; i < floatWindows.Length; i++)
                {
                    FloatWindow fw = null;
                    for (int j = 0; j < floatWindows[i].NestedPanes.Length; j++)
                    {
                        int      indexPane = floatWindows[i].NestedPanes[j].IndexPane;
                        DockPane pane      = dockPanel.Panes[indexPane];
                        if (j == 0)
                        {
                            fw = dockPanel.Theme.Extender.FloatWindowFactory.CreateFloatWindow(dockPanel, pane, floatWindows[i].Bounds);
                        }
                        else
                        {
                            int           indexPrevPane = floatWindows[i].NestedPanes[j].IndexPrevPane;
                            DockPane      prevPane      = indexPrevPane == -1 ? null : dockPanel.Panes[indexPrevPane];
                            DockAlignment alignment     = floatWindows[i].NestedPanes[j].Alignment;
                            double        proportion    = floatWindows[i].NestedPanes[j].Proportion;
                            pane.DockTo(fw, prevPane, alignment, proportion);
                        }

                        if (panes[indexPane].DockState == fw.DockState)
                        {
                            panes[indexPane].ZOrderIndex = floatWindows[i].ZOrderIndex;
                        }
                    }
                }

                // sort IDockContent by its Pane's ZOrder
                int[] sortedContents = null;
                if (contents.Length > 0)
                {
                    sortedContents = new int[contents.Length];
                    for (int i = 0; i < contents.Length; i++)
                    {
                        sortedContents[i] = i;
                    }

                    int lastDocument = contents.Length;
                    for (int i = 0; i < contents.Length - 1; i++)
                    {
                        for (int j = i + 1; j < contents.Length; j++)
                        {
                            DockPane pane1        = dockPanel.Contents[sortedContents[i]].DockHandler.Pane;
                            int      ZOrderIndex1 = pane1 == null ? 0 : panes[dockPanel.Panes.IndexOf(pane1)].ZOrderIndex;
                            DockPane pane2        = dockPanel.Contents[sortedContents[j]].DockHandler.Pane;
                            int      ZOrderIndex2 = pane2 == null ? 0 : panes[dockPanel.Panes.IndexOf(pane2)].ZOrderIndex;
                            if (ZOrderIndex1 > ZOrderIndex2)
                            {
                                int temp = sortedContents[i];
                                sortedContents[i] = sortedContents[j];
                                sortedContents[j] = temp;
                            }
                        }
                    }
                }

                // show non-document IDockContent first to avoid screen flickers
                for (int i = 0; i < contents.Length; i++)
                {
                    IDockContent content = dockPanel.Contents[sortedContents[i]];
                    if (content.DockHandler.Pane != null && content.DockHandler.Pane.DockState != DockState.Document)
                    {
                        content.DockHandler.SuspendAutoHidePortionUpdates = true;
                        content.DockHandler.IsHidden = contents[sortedContents[i]].IsHidden;
                        content.DockHandler.SuspendAutoHidePortionUpdates = false;
                    }
                }

                // after all non-document IDockContent, show document IDockContent
                for (int i = 0; i < contents.Length; i++)
                {
                    IDockContent content = dockPanel.Contents[sortedContents[i]];
                    if (content.DockHandler.Pane != null && content.DockHandler.Pane.DockState == DockState.Document)
                    {
                        content.DockHandler.SuspendAutoHidePortionUpdates = true;
                        content.DockHandler.IsHidden = contents[sortedContents[i]].IsHidden;
                        content.DockHandler.SuspendAutoHidePortionUpdates = false;
                    }
                }

                for (int i = 0; i < panes.Length; i++)
                {
                    dockPanel.Panes[i].ActiveContent = panes[i].IndexActiveContent == -1 ? null : dockPanel.Contents[panes[i].IndexActiveContent];
                }

                if (dockPanelStruct.IndexActiveDocumentPane >= 0 && dockPanel.Panes.Count > dockPanelStruct.IndexActiveDocumentPane)
                {
                    dockPanel.Panes[dockPanelStruct.IndexActiveDocumentPane].Activate();
                }

                if (dockPanelStruct.IndexActivePane >= 0 && dockPanel.Panes.Count > dockPanelStruct.IndexActivePane)
                {
                    dockPanel.Panes[dockPanelStruct.IndexActivePane].Activate();
                }

                for (int i = dockPanel.Contents.Count - 1; i >= 0; i--)
                {
                    if (dockPanel.Contents[i] is DummyContent)
                    {
                        dockPanel.Contents[i].DockHandler.Form.Close();
                    }
                }

                dockPanel.ResumeLayout(true, true);
            }