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source: trunk/HeuristicLab.ExtLibs/HeuristicLab.WinFormsUI/2.7.0/WinFormsUI-2.7.0/Docking/DockPane.cs @ 18190

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Last change on this file since 18190 was 8616, checked in by mkommend, 12 years ago
#1939: Added DockPanelSuite 2.7.0 to ExtLibs.
File size: 45.4 KB

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1	using System;
2	using System.ComponentModel;
3	using System.Drawing;
4	using System.Drawing.Drawing2D;
5	using System.Windows.Forms;
6	using System.Runtime.InteropServices;
7	using System.Security.Permissions;
8	using System.Diagnostics.CodeAnalysis;
9
10	namespace WeifenLuo.WinFormsUI.Docking
11	{
12	[ToolboxItem(false)]
13	public partial class DockPane : UserControl, IDockDragSource
14	{
15	public enum AppearanceStyle
16	{
17	ToolWindow,
18	Document
19	}
20
21	private enum HitTestArea
22	{
23	Caption,
24	TabStrip,
25	Content,
26	None
27	}
28
29	private struct HitTestResult
30	{
31	public HitTestArea HitArea;
32	public int Index;
33
34	public HitTestResult(HitTestArea hitTestArea, int index)
35	{
36	HitArea = hitTestArea;
37	Index = index;
38	}
39	}
40
41	private DockPaneCaptionBase m_captionControl;
42	private DockPaneCaptionBase CaptionControl
43	{
44	get { return m_captionControl; }
45	}
46
47	private DockPaneStripBase m_tabStripControl;
48	internal DockPaneStripBase TabStripControl
49	{
50	get { return m_tabStripControl; }
51	}
52
53	internal protected DockPane(IDockContent content, DockState visibleState, bool show)
54	{
55	InternalConstruct(content, visibleState, false, Rectangle.Empty, null, DockAlignment.Right, 0.5, show);
56	}
57
58	[SuppressMessage("Microsoft.Naming", "CA1720:AvoidTypeNamesInParameters", MessageId = "1#")]
59	internal protected DockPane(IDockContent content, FloatWindow floatWindow, bool show)
60	{
61	if (floatWindow == null)
62	throw new ArgumentNullException("floatWindow");
63
64	InternalConstruct(content, DockState.Float, false, Rectangle.Empty, floatWindow.NestedPanes.GetDefaultPreviousPane(this), DockAlignment.Right, 0.5, show);
65	}
66
67	internal protected DockPane(IDockContent content, DockPane previousPane, DockAlignment alignment, double proportion, bool show)
68	{
69	if (previousPane == null)
70	throw (new ArgumentNullException("previousPane"));
71	InternalConstruct(content, previousPane.DockState, false, Rectangle.Empty, previousPane, alignment, proportion, show);
72	}
73
74	[SuppressMessage("Microsoft.Naming", "CA1720:AvoidTypeNamesInParameters", MessageId = "1#")]
75	internal protected DockPane(IDockContent content, Rectangle floatWindowBounds, bool show)
76	{
77	InternalConstruct(content, DockState.Float, true, floatWindowBounds, null, DockAlignment.Right, 0.5, show);
78	}
79
80	private void InternalConstruct(IDockContent content, DockState dockState, bool flagBounds, Rectangle floatWindowBounds, DockPane prevPane, DockAlignment alignment, double proportion, bool show)
81	{
82	if (dockState == DockState.Hidden \|\| dockState == DockState.Unknown)
83	throw new ArgumentException(Strings.DockPane_SetDockState_InvalidState);
84
85	if (content == null)
86	throw new ArgumentNullException(Strings.DockPane_Constructor_NullContent);
87
88	if (content.DockHandler.DockPanel == null)
89	throw new ArgumentException(Strings.DockPane_Constructor_NullDockPanel);
90
91
92	SuspendLayout();
93	SetStyle(ControlStyles.Selectable, false);
94
95	m_isFloat = (dockState == DockState.Float);
96
97	m_contents = new DockContentCollection();
98	m_displayingContents = new DockContentCollection(this);
99	m_dockPanel = content.DockHandler.DockPanel;
100	m_dockPanel.AddPane(this);
101
102	m_splitter = new SplitterControl(this);
103
104	m_nestedDockingStatus = new NestedDockingStatus(this);
105
106	m_captionControl = DockPanel.DockPaneCaptionFactory.CreateDockPaneCaption(this);
107	m_tabStripControl = DockPanel.DockPaneStripFactory.CreateDockPaneStrip(this);
108	Controls.AddRange(new Control[] { m_captionControl, m_tabStripControl });
109
110	DockPanel.SuspendLayout(true);
111	if (flagBounds)
112	FloatWindow = DockPanel.FloatWindowFactory.CreateFloatWindow(DockPanel, this, floatWindowBounds);
113	else if (prevPane != null)
114	DockTo(prevPane.NestedPanesContainer, prevPane, alignment, proportion);
115
116	SetDockState(dockState);
117	if (show)
118	content.DockHandler.Pane = this;
119	else if (this.IsFloat)
120	content.DockHandler.FloatPane = this;
121	else
122	content.DockHandler.PanelPane = this;
123
124	ResumeLayout();
125	DockPanel.ResumeLayout(true, true);
126	}
127
128	private bool m_isDisposing;
129
130	protected override void Dispose(bool disposing)
131	{
132	if (disposing)
133	{
134	// IMPORTANT: avoid nested call into this method on Mono.
135	// https://github.com/dockpanelsuite/dockpanelsuite/issues/16
136	if (Win32Helper.IsRunningOnMono)
137	{
138	if (m_isDisposing)
139	return;
140
141	m_isDisposing = true;
142	}
143
144	m_dockState = DockState.Unknown;
145
146	if (NestedPanesContainer != null)
147	NestedPanesContainer.NestedPanes.Remove(this);
148
149	if (DockPanel != null)
150	{
151	DockPanel.RemovePane(this);
152	m_dockPanel = null;
153	}
154
155	Splitter.Dispose();
156	if (m_autoHidePane != null)
157	m_autoHidePane.Dispose();
158	}
159	base.Dispose(disposing);
160	}
161
162	private IDockContent m_activeContent = null;
163	public virtual IDockContent ActiveContent
164	{
165	get { return m_activeContent; }
166	set
167	{
168	if (ActiveContent == value)
169	return;
170
171	if (value != null)
172	{
173	if (!DisplayingContents.Contains(value))
174	throw (new InvalidOperationException(Strings.DockPane_ActiveContent_InvalidValue));
175	}
176	else
177	{
178	if (DisplayingContents.Count != 0)
179	throw (new InvalidOperationException(Strings.DockPane_ActiveContent_InvalidValue));
180	}
181
182	IDockContent oldValue = m_activeContent;
183
184	if (DockPanel.ActiveAutoHideContent == oldValue)
185	DockPanel.ActiveAutoHideContent = null;
186
187	m_activeContent = value;
188
189	if (DockPanel.DocumentStyle == DocumentStyle.DockingMdi && DockState == DockState.Document)
190	{
191	if (m_activeContent != null)
192	m_activeContent.DockHandler.Form.BringToFront();
193	}
194	else
195	{
196	if (m_activeContent != null)
197	m_activeContent.DockHandler.SetVisible();
198	if (oldValue != null && DisplayingContents.Contains(oldValue))
199	oldValue.DockHandler.SetVisible();
200	if (IsActivated && m_activeContent != null)
201	m_activeContent.DockHandler.Activate();
202	}
203
204	if (FloatWindow != null)
205	FloatWindow.SetText();
206
207	if (DockPanel.DocumentStyle == DocumentStyle.DockingMdi &&
208	DockState == DockState.Document)
209	RefreshChanges(false); // delayed layout to reduce screen flicker
210	else
211	RefreshChanges();
212
213	if (m_activeContent != null)
214	TabStripControl.EnsureTabVisible(m_activeContent);
215	}
216	}
217
218	private bool m_allowDockDragAndDrop = true;
219	public virtual bool AllowDockDragAndDrop
220	{
221	get { return m_allowDockDragAndDrop; }
222	set { m_allowDockDragAndDrop = value; }
223	}
224
225	private IDisposable m_autoHidePane = null;
226	internal IDisposable AutoHidePane
227	{
228	get { return m_autoHidePane; }
229	set { m_autoHidePane = value; }
230	}
231
232	private object m_autoHideTabs = null;
233	internal object AutoHideTabs
234	{
235	get { return m_autoHideTabs; }
236	set { m_autoHideTabs = value; }
237	}
238
239	private object TabPageContextMenu
240	{
241	get
242	{
243	IDockContent content = ActiveContent;
244
245	if (content == null)
246	return null;
247
248	if (content.DockHandler.TabPageContextMenuStrip != null)
249	return content.DockHandler.TabPageContextMenuStrip;
250	else if (content.DockHandler.TabPageContextMenu != null)
251	return content.DockHandler.TabPageContextMenu;
252	else
253	return null;
254	}
255	}
256
257	internal bool HasTabPageContextMenu
258	{
259	get { return TabPageContextMenu != null; }
260	}
261
262	internal void ShowTabPageContextMenu(Control control, Point position)
263	{
264	object menu = TabPageContextMenu;
265
266	if (menu == null)
267	return;
268
269	ContextMenuStrip contextMenuStrip = menu as ContextMenuStrip;
270	if (contextMenuStrip != null)
271	{
272	contextMenuStrip.Show(control, position);
273	return;
274	}
275
276	ContextMenu contextMenu = menu as ContextMenu;
277	if (contextMenu != null)
278	contextMenu.Show(this, position);
279	}
280
281	private Rectangle CaptionRectangle
282	{
283	get
284	{
285	if (!HasCaption)
286	return Rectangle.Empty;
287
288	Rectangle rectWindow = DisplayingRectangle;
289	int x, y, width;
290	x = rectWindow.X;
291	y = rectWindow.Y;
292	width = rectWindow.Width;
293	int height = CaptionControl.MeasureHeight();
294
295	return new Rectangle(x, y, width, height);
296	}
297	}
298
299	internal Rectangle ContentRectangle
300	{
301	get
302	{
303	Rectangle rectWindow = DisplayingRectangle;
304	Rectangle rectCaption = CaptionRectangle;
305	Rectangle rectTabStrip = TabStripRectangle;
306
307	int x = rectWindow.X;
308
309	int y = rectWindow.Y + (rectCaption.IsEmpty ? 0 : rectCaption.Height);
310	if (DockState == DockState.Document && DockPanel.DocumentTabStripLocation == DocumentTabStripLocation.Top)
311	y += rectTabStrip.Height;
312
313	int width = rectWindow.Width;
314	int height = rectWindow.Height - rectCaption.Height - rectTabStrip.Height;
315
316	return new Rectangle(x, y, width, height);
317	}
318	}
319
320	internal Rectangle TabStripRectangle
321	{
322	get
323	{
324	if (Appearance == AppearanceStyle.ToolWindow)
325	return TabStripRectangle_ToolWindow;
326	else
327	return TabStripRectangle_Document;
328	}
329	}
330
331	private Rectangle TabStripRectangle_ToolWindow
332	{
333	get
334	{
335	if (DisplayingContents.Count <= 1 \|\| IsAutoHide)
336	return Rectangle.Empty;
337
338	Rectangle rectWindow = DisplayingRectangle;
339
340	int width = rectWindow.Width;
341	int height = TabStripControl.MeasureHeight();
342	int x = rectWindow.X;
343	int y = rectWindow.Bottom - height;
344	Rectangle rectCaption = CaptionRectangle;
345	if (rectCaption.Contains(x, y))
346	y = rectCaption.Y + rectCaption.Height;
347
348	return new Rectangle(x, y, width, height);
349	}
350	}
351
352	private Rectangle TabStripRectangle_Document
353	{
354	get
355	{
356	if (DisplayingContents.Count == 0)
357	return Rectangle.Empty;
358
359	if (DisplayingContents.Count == 1 && DockPanel.DocumentStyle == DocumentStyle.DockingSdi)
360	return Rectangle.Empty;
361
362	Rectangle rectWindow = DisplayingRectangle;
363	int x = rectWindow.X;
364	int width = rectWindow.Width;
365	int height = TabStripControl.MeasureHeight();
366
367	int y = 0;
368	if (DockPanel.DocumentTabStripLocation == DocumentTabStripLocation.Bottom)
369	y = rectWindow.Height - height;
370	else
371	y = rectWindow.Y;
372
373	return new Rectangle(x, y, width, height);
374	}
375	}
376
377	public virtual string CaptionText
378	{
379	get { return ActiveContent == null ? string.Empty : ActiveContent.DockHandler.TabText; }
380	}
381
382	private DockContentCollection m_contents;
383	public DockContentCollection Contents
384	{
385	get { return m_contents; }
386	}
387
388	private DockContentCollection m_displayingContents;
389	public DockContentCollection DisplayingContents
390	{
391	get { return m_displayingContents; }
392	}
393
394	private DockPanel m_dockPanel;
395	public DockPanel DockPanel
396	{
397	get { return m_dockPanel; }
398	}
399
400	private bool HasCaption
401	{
402	get
403	{
404	if (DockState == DockState.Document \|\|
405	DockState == DockState.Hidden \|\|
406	DockState == DockState.Unknown \|\|
407	(DockState == DockState.Float && FloatWindow.VisibleNestedPanes.Count <= 1))
408	return false;
409	else
410	return true;
411	}
412	}
413
414	private bool m_isActivated = false;
415	public bool IsActivated
416	{
417	get { return m_isActivated; }
418	}
419	internal void SetIsActivated(bool value)
420	{
421	if (m_isActivated == value)
422	return;
423
424	m_isActivated = value;
425	if (DockState != DockState.Document)
426	RefreshChanges(false);
427	OnIsActivatedChanged(EventArgs.Empty);
428	}
429
430	private bool m_isActiveDocumentPane = false;
431	public bool IsActiveDocumentPane
432	{
433	get { return m_isActiveDocumentPane; }
434	}
435	internal void SetIsActiveDocumentPane(bool value)
436	{
437	if (m_isActiveDocumentPane == value)
438	return;
439
440	m_isActiveDocumentPane = value;
441	if (DockState == DockState.Document)
442	RefreshChanges();
443	OnIsActiveDocumentPaneChanged(EventArgs.Empty);
444	}
445
446	public bool IsDockStateValid(DockState dockState)
447	{
448	foreach (IDockContent content in Contents)
449	if (!content.DockHandler.IsDockStateValid(dockState))
450	return false;
451
452	return true;
453	}
454
455	public bool IsAutoHide
456	{
457	get { return DockHelper.IsDockStateAutoHide(DockState); }
458	}
459
460	public AppearanceStyle Appearance
461	{
462	get { return (DockState == DockState.Document) ? AppearanceStyle.Document : AppearanceStyle.ToolWindow; }
463	}
464
465	internal Rectangle DisplayingRectangle
466	{
467	get { return ClientRectangle; }
468	}
469
470	public void Activate()
471	{
472	if (DockHelper.IsDockStateAutoHide(DockState) && DockPanel.ActiveAutoHideContent != ActiveContent)
473	DockPanel.ActiveAutoHideContent = ActiveContent;
474	else if (!IsActivated && ActiveContent != null)
475	ActiveContent.DockHandler.Activate();
476	}
477
478	internal void AddContent(IDockContent content)
479	{
480	if (Contents.Contains(content))
481	return;
482
483	Contents.Add(content);
484	}
485
486	internal void Close()
487	{
488	Dispose();
489	}
490
491	public void CloseActiveContent()
492	{
493	CloseContent(ActiveContent);
494	}
495
496	internal void CloseContent(IDockContent content)
497	{
498	if (content == null)
499	return;
500
501	if (!content.DockHandler.CloseButton)
502	return;
503
504	DockPanel dockPanel = DockPanel;
505
506	dockPanel.SuspendLayout(true);
507
508	try
509	{
510	if (content.DockHandler.HideOnClose)
511	{
512	content.DockHandler.Hide();
513	NestedDockingStatus.NestedPanes.SwitchPaneWithFirstChild(this);
514	}
515	else
516	content.DockHandler.Close();
517	}
518	finally
519	{
520	dockPanel.ResumeLayout(true, true);
521	}
522	}
523
524	private HitTestResult GetHitTest(Point ptMouse)
525	{
526	Point ptMouseClient = PointToClient(ptMouse);
527
528	Rectangle rectCaption = CaptionRectangle;
529	if (rectCaption.Contains(ptMouseClient))
530	return new HitTestResult(HitTestArea.Caption, -1);
531
532	Rectangle rectContent = ContentRectangle;
533	if (rectContent.Contains(ptMouseClient))
534	return new HitTestResult(HitTestArea.Content, -1);
535
536	Rectangle rectTabStrip = TabStripRectangle;
537	if (rectTabStrip.Contains(ptMouseClient))
538	return new HitTestResult(HitTestArea.TabStrip, TabStripControl.HitTest(TabStripControl.PointToClient(ptMouse)));
539
540	return new HitTestResult(HitTestArea.None, -1);
541	}
542
543	private bool m_isHidden = true;
544	public bool IsHidden
545	{
546	get { return m_isHidden; }
547	}
548	private void SetIsHidden(bool value)
549	{
550	if (m_isHidden == value)
551	return;
552
553	m_isHidden = value;
554	if (DockHelper.IsDockStateAutoHide(DockState))
555	{
556	DockPanel.RefreshAutoHideStrip();
557	DockPanel.PerformLayout();
558	}
559	else if (NestedPanesContainer != null)
560	((Control)NestedPanesContainer).PerformLayout();
561	}
562
563	protected override void OnLayout(LayoutEventArgs levent)
564	{
565	SetIsHidden(DisplayingContents.Count == 0);
566	if (!IsHidden)
567	{
568	CaptionControl.Bounds = CaptionRectangle;
569	TabStripControl.Bounds = TabStripRectangle;
570
571	SetContentBounds();
572
573	foreach (IDockContent content in Contents)
574	{
575	if (DisplayingContents.Contains(content))
576	if (content.DockHandler.FlagClipWindow && content.DockHandler.Form.Visible)
577	content.DockHandler.FlagClipWindow = false;
578	}
579	}
580
581	base.OnLayout(levent);
582	}
583
584	internal void SetContentBounds()
585	{
586	Rectangle rectContent = ContentRectangle;
587	if (DockState == DockState.Document && DockPanel.DocumentStyle == DocumentStyle.DockingMdi)
588	rectContent = DockPanel.RectangleToMdiClient(RectangleToScreen(rectContent));
589
590	Rectangle rectInactive = new Rectangle(-rectContent.Width, rectContent.Y, rectContent.Width, rectContent.Height);
591	foreach (IDockContent content in Contents)
592	if (content.DockHandler.Pane == this)
593	{
594	if (content == ActiveContent)
595	content.DockHandler.Form.Bounds = rectContent;
596	else
597	content.DockHandler.Form.Bounds = rectInactive;
598	}
599	}
600
601	internal void RefreshChanges()
602	{
603	RefreshChanges(true);
604	}
605
606	private void RefreshChanges(bool performLayout)
607	{
608	if (IsDisposed)
609	return;
610
611	CaptionControl.RefreshChanges();
612	TabStripControl.RefreshChanges();
613	if (DockState == DockState.Float && FloatWindow != null)
614	FloatWindow.RefreshChanges();
615	if (DockHelper.IsDockStateAutoHide(DockState) && DockPanel != null)
616	{
617	DockPanel.RefreshAutoHideStrip();
618	DockPanel.PerformLayout();
619	}
620
621	if (performLayout)
622	PerformLayout();
623	}
624
625	internal void RemoveContent(IDockContent content)
626	{
627	if (!Contents.Contains(content))
628	return;
629
630	Contents.Remove(content);
631	}
632
633	public void SetContentIndex(IDockContent content, int index)
634	{
635	int oldIndex = Contents.IndexOf(content);
636	if (oldIndex == -1)
637	throw (new ArgumentException(Strings.DockPane_SetContentIndex_InvalidContent));
638
639	if (index < 0 \|\| index > Contents.Count - 1)
640	if (index != -1)
641	throw (new ArgumentOutOfRangeException(Strings.DockPane_SetContentIndex_InvalidIndex));
642
643	if (oldIndex == index)
644	return;
645	if (oldIndex == Contents.Count - 1 && index == -1)
646	return;
647
648	Contents.Remove(content);
649	if (index == -1)
650	Contents.Add(content);
651	else if (oldIndex < index)
652	Contents.AddAt(content, index - 1);
653	else
654	Contents.AddAt(content, index);
655
656	RefreshChanges();
657	}
658
659	private void SetParent()
660	{
661	if (DockState == DockState.Unknown \|\| DockState == DockState.Hidden)
662	{
663	SetParent(null);
664	Splitter.Parent = null;
665	}
666	else if (DockState == DockState.Float)
667	{
668	SetParent(FloatWindow);
669	Splitter.Parent = FloatWindow;
670	}
671	else if (DockHelper.IsDockStateAutoHide(DockState))
672	{
673	SetParent(DockPanel.AutoHideControl);
674	Splitter.Parent = null;
675	}
676	else
677	{
678	SetParent(DockPanel.DockWindows[DockState]);
679	Splitter.Parent = Parent;
680	}
681	}
682
683	private void SetParent(Control value)
684	{
685	if (Parent == value)
686	return;
687
688	//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
689	// Workaround of .Net Framework bug:
690	// Change the parent of a control with focus may result in the first
691	// MDI child form get activated.
692	//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
693	IDockContent contentFocused = GetFocusedContent();
694	if (contentFocused != null)
695	DockPanel.SaveFocus();
696
697	//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
698
699	Parent = value;
700
701	//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
702	// Workaround of .Net Framework bug:
703	// Change the parent of a control with focus may result in the first
704	// MDI child form get activated.
705	//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
706	if (contentFocused != null)
707	contentFocused.DockHandler.Activate();
708	//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
709	}
710
711	public new void Show()
712	{
713	Activate();
714	}
715
716	internal void TestDrop(IDockDragSource dragSource, DockOutlineBase dockOutline)
717	{
718	if (!dragSource.CanDockTo(this))
719	return;
720
721	Point ptMouse = Control.MousePosition;
722
723	HitTestResult hitTestResult = GetHitTest(ptMouse);
724	if (hitTestResult.HitArea == HitTestArea.Caption)
725	dockOutline.Show(this, -1);
726	else if (hitTestResult.HitArea == HitTestArea.TabStrip && hitTestResult.Index != -1)
727	dockOutline.Show(this, hitTestResult.Index);
728	}
729
730	internal void ValidateActiveContent()
731	{
732	if (ActiveContent == null)
733	{
734	if (DisplayingContents.Count != 0)
735	ActiveContent = DisplayingContents[0];
736	return;
737	}
738
739	if (DisplayingContents.IndexOf(ActiveContent) >= 0)
740	return;
741
742	IDockContent prevVisible = null;
743	for (int i = Contents.IndexOf(ActiveContent) - 1; i >= 0; i--)
744	if (Contents[i].DockHandler.DockState == DockState)
745	{
746	prevVisible = Contents[i];
747	break;
748	}
749
750	IDockContent nextVisible = null;
751	for (int i = Contents.IndexOf(ActiveContent) + 1; i < Contents.Count; i++)
752	if (Contents[i].DockHandler.DockState == DockState)
753	{
754	nextVisible = Contents[i];
755	break;
756	}
757
758	if (prevVisible != null)
759	ActiveContent = prevVisible;
760	else if (nextVisible != null)
761	ActiveContent = nextVisible;
762	else
763	ActiveContent = null;
764	}
765
766	private static readonly object DockStateChangedEvent = new object();
767	public event EventHandler DockStateChanged
768	{
769	add { Events.AddHandler(DockStateChangedEvent, value); }
770	remove { Events.RemoveHandler(DockStateChangedEvent, value); }
771	}
772	protected virtual void OnDockStateChanged(EventArgs e)
773	{
774	EventHandler handler = (EventHandler)Events[DockStateChangedEvent];
775	if (handler != null)
776	handler(this, e);
777	}
778
779	private static readonly object IsActivatedChangedEvent = new object();
780	public event EventHandler IsActivatedChanged
781	{
782	add { Events.AddHandler(IsActivatedChangedEvent, value); }
783	remove { Events.RemoveHandler(IsActivatedChangedEvent, value); }
784	}
785	protected virtual void OnIsActivatedChanged(EventArgs e)
786	{
787	EventHandler handler = (EventHandler)Events[IsActivatedChangedEvent];
788	if (handler != null)
789	handler(this, e);
790	}
791
792	private static readonly object IsActiveDocumentPaneChangedEvent = new object();
793	public event EventHandler IsActiveDocumentPaneChanged
794	{
795	add { Events.AddHandler(IsActiveDocumentPaneChangedEvent, value); }
796	remove { Events.RemoveHandler(IsActiveDocumentPaneChangedEvent, value); }
797	}
798	protected virtual void OnIsActiveDocumentPaneChanged(EventArgs e)
799	{
800	EventHandler handler = (EventHandler)Events[IsActiveDocumentPaneChangedEvent];
801	if (handler != null)
802	handler(this, e);
803	}
804
805	public DockWindow DockWindow
806	{
807	get { return (m_nestedDockingStatus.NestedPanes == null) ? null : m_nestedDockingStatus.NestedPanes.Container as DockWindow; }
808	set
809	{
810	DockWindow oldValue = DockWindow;
811	if (oldValue == value)
812	return;
813
814	DockTo(value);
815	}
816	}
817
818	public FloatWindow FloatWindow
819	{
820	get { return (m_nestedDockingStatus.NestedPanes == null) ? null : m_nestedDockingStatus.NestedPanes.Container as FloatWindow; }
821	set
822	{
823	FloatWindow oldValue = FloatWindow;
824	if (oldValue == value)
825	return;
826
827	DockTo(value);
828	}
829	}
830
831	private NestedDockingStatus m_nestedDockingStatus;
832	public NestedDockingStatus NestedDockingStatus
833	{
834	get { return m_nestedDockingStatus; }
835	}
836
837	private bool m_isFloat;
838	public bool IsFloat
839	{
840	get { return m_isFloat; }
841	}
842
843	public INestedPanesContainer NestedPanesContainer
844	{
845	get
846	{
847	if (NestedDockingStatus.NestedPanes == null)
848	return null;
849	else
850	return NestedDockingStatus.NestedPanes.Container;
851	}
852	}
853
854	private DockState m_dockState = DockState.Unknown;
855	public DockState DockState
856	{
857	get { return m_dockState; }
858	set
859	{
860	SetDockState(value);
861	}
862	}
863
864	public DockPane SetDockState(DockState value)
865	{
866	if (value == DockState.Unknown \|\| value == DockState.Hidden)
867	throw new InvalidOperationException(Strings.DockPane_SetDockState_InvalidState);
868
869	if ((value == DockState.Float) == this.IsFloat)
870	{
871	InternalSetDockState(value);
872	return this;
873	}
874
875	if (DisplayingContents.Count == 0)
876	return null;
877
878	IDockContent firstContent = null;
879	for (int i = 0; i < DisplayingContents.Count; i++)
880	{
881	IDockContent content = DisplayingContents[i];
882	if (content.DockHandler.IsDockStateValid(value))
883	{
884	firstContent = content;
885	break;
886	}
887	}
888	if (firstContent == null)
889	return null;
890
891	firstContent.DockHandler.DockState = value;
892	DockPane pane = firstContent.DockHandler.Pane;
893	DockPanel.SuspendLayout(true);
894	for (int i = 0; i < DisplayingContents.Count; i++)
895	{
896	IDockContent content = DisplayingContents[i];
897	if (content.DockHandler.IsDockStateValid(value))
898	content.DockHandler.Pane = pane;
899	}
900	DockPanel.ResumeLayout(true, true);
901	return pane;
902	}
903
904	private void InternalSetDockState(DockState value)
905	{
906	if (m_dockState == value)
907	return;
908
909	DockState oldDockState = m_dockState;
910	INestedPanesContainer oldContainer = NestedPanesContainer;
911
912	m_dockState = value;
913
914	SuspendRefreshStateChange();
915
916	IDockContent contentFocused = GetFocusedContent();
917	if (contentFocused != null)
918	DockPanel.SaveFocus();
919
920	if (!IsFloat)
921	DockWindow = DockPanel.DockWindows[DockState];
922	else if (FloatWindow == null)
923	FloatWindow = DockPanel.FloatWindowFactory.CreateFloatWindow(DockPanel, this);
924
925	if (contentFocused != null)
926	if (!Win32Helper.IsRunningOnMono)
927	DockPanel.ContentFocusManager.Activate(contentFocused);
928
929	ResumeRefreshStateChange(oldContainer, oldDockState);
930	}
931
932	private int m_countRefreshStateChange = 0;
933	private void SuspendRefreshStateChange()
934	{
935	m_countRefreshStateChange++;
936	DockPanel.SuspendLayout(true);
937	}
938
939	private void ResumeRefreshStateChange()
940	{
941	m_countRefreshStateChange--;
942	System.Diagnostics.Debug.Assert(m_countRefreshStateChange >= 0);
943	DockPanel.ResumeLayout(true, true);
944	}
945
946	private bool IsRefreshStateChangeSuspended
947	{
948	get { return m_countRefreshStateChange != 0; }
949	}
950
951	private void ResumeRefreshStateChange(INestedPanesContainer oldContainer, DockState oldDockState)
952	{
953	ResumeRefreshStateChange();
954	RefreshStateChange(oldContainer, oldDockState);
955	}
956
957	private void RefreshStateChange(INestedPanesContainer oldContainer, DockState oldDockState)
958	{
959	lock (this)
960	{
961	if (IsRefreshStateChangeSuspended)
962	return;
963
964	SuspendRefreshStateChange();
965	}
966
967	DockPanel.SuspendLayout(true);
968
969	IDockContent contentFocused = GetFocusedContent();
970	if (contentFocused != null)
971	DockPanel.SaveFocus();
972	SetParent();
973
974	if (ActiveContent != null)
975	ActiveContent.DockHandler.SetDockState(ActiveContent.DockHandler.IsHidden, DockState, ActiveContent.DockHandler.Pane);
976	foreach (IDockContent content in Contents)
977	{
978	if (content.DockHandler.Pane == this)
979	content.DockHandler.SetDockState(content.DockHandler.IsHidden, DockState, content.DockHandler.Pane);
980	}
981
982	if (oldContainer != null)
983	{
984	Control oldContainerControl = (Control)oldContainer;
985	if (oldContainer.DockState == oldDockState && !oldContainerControl.IsDisposed)
986	oldContainerControl.PerformLayout();
987	}
988	if (DockHelper.IsDockStateAutoHide(oldDockState))
989	DockPanel.RefreshActiveAutoHideContent();
990
991	if (NestedPanesContainer.DockState == DockState)
992	((Control)NestedPanesContainer).PerformLayout();
993	if (DockHelper.IsDockStateAutoHide(DockState))
994	DockPanel.RefreshActiveAutoHideContent();
995
996	if (DockHelper.IsDockStateAutoHide(oldDockState) \|\|
997	DockHelper.IsDockStateAutoHide(DockState))
998	{
999	DockPanel.RefreshAutoHideStrip();
1000	DockPanel.PerformLayout();
1001	}
1002
1003	ResumeRefreshStateChange();
1004
1005	if (contentFocused != null)
1006	contentFocused.DockHandler.Activate();
1007
1008	DockPanel.ResumeLayout(true, true);
1009
1010	if (oldDockState != DockState)
1011	OnDockStateChanged(EventArgs.Empty);
1012	}
1013
1014	private IDockContent GetFocusedContent()
1015	{
1016	IDockContent contentFocused = null;
1017	foreach (IDockContent content in Contents)
1018	{
1019	if (content.DockHandler.Form.ContainsFocus)
1020	{
1021	contentFocused = content;
1022	break;
1023	}
1024	}
1025
1026	return contentFocused;
1027	}
1028
1029	public DockPane DockTo(INestedPanesContainer container)
1030	{
1031	if (container == null)
1032	throw new InvalidOperationException(Strings.DockPane_DockTo_NullContainer);
1033
1034	DockAlignment alignment;
1035	if (container.DockState == DockState.DockLeft \|\| container.DockState == DockState.DockRight)
1036	alignment = DockAlignment.Bottom;
1037	else
1038	alignment = DockAlignment.Right;
1039
1040	return DockTo(container, container.NestedPanes.GetDefaultPreviousPane(this), alignment, 0.5);
1041	}
1042
1043	public DockPane DockTo(INestedPanesContainer container, DockPane previousPane, DockAlignment alignment, double proportion)
1044	{
1045	if (container == null)
1046	throw new InvalidOperationException(Strings.DockPane_DockTo_NullContainer);
1047
1048	if (container.IsFloat == this.IsFloat)
1049	{
1050	InternalAddToDockList(container, previousPane, alignment, proportion);
1051	return this;
1052	}
1053
1054	IDockContent firstContent = GetFirstContent(container.DockState);
1055	if (firstContent == null)
1056	return null;
1057
1058	DockPane pane;
1059	DockPanel.DummyContent.DockPanel = DockPanel;
1060	if (container.IsFloat)
1061	pane = DockPanel.DockPaneFactory.CreateDockPane(DockPanel.DummyContent, (FloatWindow)container, true);
1062	else
1063	pane = DockPanel.DockPaneFactory.CreateDockPane(DockPanel.DummyContent, container.DockState, true);
1064
1065	pane.DockTo(container, previousPane, alignment, proportion);
1066	SetVisibleContentsToPane(pane);
1067	DockPanel.DummyContent.DockPanel = null;
1068
1069	return pane;
1070	}
1071
1072	private void SetVisibleContentsToPane(DockPane pane)
1073	{
1074	SetVisibleContentsToPane(pane, ActiveContent);
1075	}
1076
1077	private void SetVisibleContentsToPane(DockPane pane, IDockContent activeContent)
1078	{
1079	for (int i = 0; i < DisplayingContents.Count; i++)
1080	{
1081	IDockContent content = DisplayingContents[i];
1082	if (content.DockHandler.IsDockStateValid(pane.DockState))
1083	{
1084	content.DockHandler.Pane = pane;
1085	i--;
1086	}
1087	}
1088
1089	if (activeContent.DockHandler.Pane == pane)
1090	pane.ActiveContent = activeContent;
1091	}
1092
1093	private void InternalAddToDockList(INestedPanesContainer container, DockPane prevPane, DockAlignment alignment, double proportion)
1094	{
1095	if ((container.DockState == DockState.Float) != IsFloat)
1096	throw new InvalidOperationException(Strings.DockPane_DockTo_InvalidContainer);
1097
1098	int count = container.NestedPanes.Count;
1099	if (container.NestedPanes.Contains(this))
1100	count--;
1101	if (prevPane == null && count > 0)
1102	throw new InvalidOperationException(Strings.DockPane_DockTo_NullPrevPane);
1103
1104	if (prevPane != null && !container.NestedPanes.Contains(prevPane))
1105	throw new InvalidOperationException(Strings.DockPane_DockTo_NoPrevPane);
1106
1107	if (prevPane == this)
1108	throw new InvalidOperationException(Strings.DockPane_DockTo_SelfPrevPane);
1109
1110	INestedPanesContainer oldContainer = NestedPanesContainer;
1111	DockState oldDockState = DockState;
1112	container.NestedPanes.Add(this);
1113	NestedDockingStatus.SetStatus(container.NestedPanes, prevPane, alignment, proportion);
1114
1115	if (DockHelper.IsDockWindowState(DockState))
1116	m_dockState = container.DockState;
1117
1118	RefreshStateChange(oldContainer, oldDockState);
1119	}
1120
1121	public void SetNestedDockingProportion(double proportion)
1122	{
1123	NestedDockingStatus.SetStatus(NestedDockingStatus.NestedPanes, NestedDockingStatus.PreviousPane, NestedDockingStatus.Alignment, proportion);
1124	if (NestedPanesContainer != null)
1125	((Control)NestedPanesContainer).PerformLayout();
1126	}
1127
1128	public DockPane Float()
1129	{
1130	DockPanel.SuspendLayout(true);
1131
1132	IDockContent activeContent = ActiveContent;
1133
1134	DockPane floatPane = GetFloatPaneFromContents();
1135	if (floatPane == null)
1136	{
1137	IDockContent firstContent = GetFirstContent(DockState.Float);
1138	if (firstContent == null)
1139	{
1140	DockPanel.ResumeLayout(true, true);
1141	return null;
1142	}
1143	floatPane = DockPanel.DockPaneFactory.CreateDockPane(firstContent, DockState.Float, true);
1144	}
1145	SetVisibleContentsToPane(floatPane, activeContent);
1146
1147	DockPanel.ResumeLayout(true, true);
1148	return floatPane;
1149	}
1150
1151	private DockPane GetFloatPaneFromContents()
1152	{
1153	DockPane floatPane = null;
1154	for (int i = 0; i < DisplayingContents.Count; i++)
1155	{
1156	IDockContent content = DisplayingContents[i];
1157	if (!content.DockHandler.IsDockStateValid(DockState.Float))
1158	continue;
1159
1160	if (floatPane != null && content.DockHandler.FloatPane != floatPane)
1161	return null;
1162	else
1163	floatPane = content.DockHandler.FloatPane;
1164	}
1165
1166	return floatPane;
1167	}
1168
1169	private IDockContent GetFirstContent(DockState dockState)
1170	{
1171	for (int i = 0; i < DisplayingContents.Count; i++)
1172	{
1173	IDockContent content = DisplayingContents[i];
1174	if (content.DockHandler.IsDockStateValid(dockState))
1175	return content;
1176	}
1177	return null;
1178	}
1179
1180	public void RestoreToPanel()
1181	{
1182	DockPanel.SuspendLayout(true);
1183
1184	IDockContent activeContent = DockPanel.ActiveContent;
1185
1186	for (int i = DisplayingContents.Count - 1; i >= 0; i--)
1187	{
1188	IDockContent content = DisplayingContents[i];
1189	if (content.DockHandler.CheckDockState(false) != DockState.Unknown)
1190	content.DockHandler.IsFloat = false;
1191	}
1192
1193	DockPanel.ResumeLayout(true, true);
1194	}
1195
1196	[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
1197	protected override void WndProc(ref Message m)
1198	{
1199	if (m.Msg == (int)Win32.Msgs.WM_MOUSEACTIVATE)
1200	Activate();
1201
1202	base.WndProc(ref m);
1203	}
1204
1205	#region IDockDragSource Members
1206
1207	#region IDragSource Members
1208
1209	Control IDragSource.DragControl
1210	{
1211	get { return this; }
1212	}
1213
1214	#endregion
1215
1216	bool IDockDragSource.IsDockStateValid(DockState dockState)
1217	{
1218	return IsDockStateValid(dockState);
1219	}
1220
1221	bool IDockDragSource.CanDockTo(DockPane pane)
1222	{
1223	if (!IsDockStateValid(pane.DockState))
1224	return false;
1225
1226	if (pane == this)
1227	return false;
1228
1229	return true;
1230	}
1231
1232	Rectangle IDockDragSource.BeginDrag(Point ptMouse)
1233	{
1234	Point location = PointToScreen(new Point(0, 0));
1235	Size size;
1236
1237	DockPane floatPane = ActiveContent.DockHandler.FloatPane;
1238	if (DockState == DockState.Float \|\| floatPane == null \|\| floatPane.FloatWindow.NestedPanes.Count != 1)
1239	size = DockPanel.DefaultFloatWindowSize;
1240	else
1241	size = floatPane.FloatWindow.Size;
1242
1243	if (ptMouse.X > location.X + size.Width)
1244	location.X += ptMouse.X - (location.X + size.Width) + Measures.SplitterSize;
1245
1246	return new Rectangle(location, size);
1247	}
1248
1249	void IDockDragSource.EndDrag()
1250	{
1251	}
1252
1253	public void FloatAt(Rectangle floatWindowBounds)
1254	{
1255	if (FloatWindow == null \|\| FloatWindow.NestedPanes.Count != 1)
1256	FloatWindow = DockPanel.FloatWindowFactory.CreateFloatWindow(DockPanel, this, floatWindowBounds);
1257	else
1258	FloatWindow.Bounds = floatWindowBounds;
1259
1260	DockState = DockState.Float;
1261
1262	NestedDockingStatus.NestedPanes.SwitchPaneWithFirstChild(this);
1263	}
1264
1265	public void DockTo(DockPane pane, DockStyle dockStyle, int contentIndex)
1266	{
1267	if (dockStyle == DockStyle.Fill)
1268	{
1269	IDockContent activeContent = ActiveContent;
1270	for (int i = Contents.Count - 1; i >= 0; i--)
1271	{
1272	IDockContent c = Contents[i];
1273	if (c.DockHandler.DockState == DockState)
1274	{
1275	c.DockHandler.Pane = pane;
1276	if (contentIndex != -1)
1277	pane.SetContentIndex(c, contentIndex);
1278	}
1279	}
1280	pane.ActiveContent = activeContent;
1281	}
1282	else
1283	{
1284	if (dockStyle == DockStyle.Left)
1285	DockTo(pane.NestedPanesContainer, pane, DockAlignment.Left, 0.5);
1286	else if (dockStyle == DockStyle.Right)
1287	DockTo(pane.NestedPanesContainer, pane, DockAlignment.Right, 0.5);
1288	else if (dockStyle == DockStyle.Top)
1289	DockTo(pane.NestedPanesContainer, pane, DockAlignment.Top, 0.5);
1290	else if (dockStyle == DockStyle.Bottom)
1291	DockTo(pane.NestedPanesContainer, pane, DockAlignment.Bottom, 0.5);
1292
1293	DockState = pane.DockState;
1294	}
1295	}
1296
1297	public void DockTo(DockPanel panel, DockStyle dockStyle)
1298	{
1299	if (panel != DockPanel)
1300	throw new ArgumentException(Strings.IDockDragSource_DockTo_InvalidPanel, "panel");
1301
1302	if (dockStyle == DockStyle.Top)
1303	DockState = DockState.DockTop;
1304	else if (dockStyle == DockStyle.Bottom)
1305	DockState = DockState.DockBottom;
1306	else if (dockStyle == DockStyle.Left)
1307	DockState = DockState.DockLeft;
1308	else if (dockStyle == DockStyle.Right)
1309	DockState = DockState.DockRight;
1310	else if (dockStyle == DockStyle.Fill)
1311	DockState = DockState.Document;
1312	}
1313
1314	#endregion
1315	}
1316	}

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