OpenHardwareMonitor-retired: External/Aga.Controls/Tree/TreeViewAdv.cs@5715aefd2bcc

     1 using System;

     2 using System.Collections.Generic;

     3 using System.Collections.ObjectModel;

     4 using System.ComponentModel;

     5 using System.Drawing;

     6 using System.Security.Permissions;

     7 using System.Threading;

     8 using System.Windows.Forms;

     9 using System.Collections;

    11 using Aga.Controls.Tree.NodeControls;

    12 using Aga.Controls.Threading;

    15 namespace Aga.Controls.Tree

    16 {

    17 	/// <summary>

    18 	/// Extensible advanced <see cref="TreeView"/> implemented in 100% managed C# code.

    19 	/// Features: Model/View architecture. Multiple column per node. Ability to select

    20 	/// multiple tree nodes. Different types of controls for each node column:

    21 	/// <see cref="CheckBox"/>, Icon, Label... Drag and Drop highlighting. Load on

    22 	/// demand of nodes. Incremental search of nodes.

    23 	/// </summary>

    24 	public partial class TreeViewAdv : Control

    25 	{

    26 		private const int LeftMargin = 7;

    27 		internal const int ItemDragSensivity = 4;

    28 		private readonly int _columnHeaderHeight;

    29 		private const int DividerWidth = 9;

    30 		private const int DividerCorrectionGap = -2;

    32 		private Pen _linePen;

    33 		private Pen _markPen;

    34 		private bool _suspendUpdate;

    35 		private bool _needFullUpdate;

    36 		private bool _fireSelectionEvent;

    37 		private NodePlusMinus _plusMinus;

    38 		private ToolTip _toolTip;

    39 		private DrawContext _measureContext;

    40 		private TreeColumn _hotColumn;

    41 		private IncrementalSearch _search;

    42 		private List<TreeNodeAdv> _expandingNodes = new List<TreeNodeAdv>();

    43 		private AbortableThreadPool _threadPool = new AbortableThreadPool();

    45 		#region Public Events

    47 		[Category("Action")]

    48 		public event ItemDragEventHandler ItemDrag;

    49 		private void OnItemDrag(MouseButtons buttons, object item)

    50 		{

    51 			if (ItemDrag != null)

    52 				ItemDrag(this, new ItemDragEventArgs(buttons, item));

    53 		}

    55 		[Category("Behavior")]

    56 		public event EventHandler<TreeNodeAdvMouseEventArgs> NodeMouseClick;

    57 		private void OnNodeMouseClick(TreeNodeAdvMouseEventArgs args)

    58 		{

    59 			if (NodeMouseClick != null)

    60 				NodeMouseClick(this, args);

    61 		}

    63 		[Category("Behavior")]

    64 		public event EventHandler<TreeNodeAdvMouseEventArgs> NodeMouseDoubleClick;

    65 		private void OnNodeMouseDoubleClick(TreeNodeAdvMouseEventArgs args)

    66 		{

    67 			if (NodeMouseDoubleClick != null)

    68 				NodeMouseDoubleClick(this, args);

    69 		}

    71 		[Category("Behavior")]

    72 		public event EventHandler<TreeColumnEventArgs> ColumnWidthChanged;

    73 		internal void OnColumnWidthChanged(TreeColumn column)

    74 		{

    75 			if (ColumnWidthChanged != null)

    76 				ColumnWidthChanged(this, new TreeColumnEventArgs(column));

    77 		}

    79 		[Category("Behavior")]

    80 		public event EventHandler<TreeColumnEventArgs> ColumnReordered;

    81 		internal void OnColumnReordered(TreeColumn column)

    82 		{

    83 			if (ColumnReordered != null)

    84 				ColumnReordered(this, new TreeColumnEventArgs(column));

    85 		}

    87 		[Category("Behavior")]

    88 		public event EventHandler<TreeColumnEventArgs> ColumnClicked;

    89 		internal void OnColumnClicked(TreeColumn column)

    90 		{

    91 			if (ColumnClicked != null)

    92 				ColumnClicked(this, new TreeColumnEventArgs(column));

    93 		}

    95 		[Category("Behavior")]

    96 		public event EventHandler SelectionChanged;

    97 		internal void OnSelectionChanged()

    98 		{

    99 			if (SuspendSelectionEvent)

   100 				_fireSelectionEvent = true;

   101 			else

   102 			{

   103 				_fireSelectionEvent = false;

   104 				if (SelectionChanged != null)

   105 					SelectionChanged(this, EventArgs.Empty);

   106 			}

   107 		}

   109 		[Category("Behavior")]

   110 		public event EventHandler<TreeViewAdvEventArgs> Collapsing;

   111 		private void OnCollapsing(TreeNodeAdv node)

   112 		{

   113 			if (Collapsing != null)

   114 				Collapsing(this, new TreeViewAdvEventArgs(node));

   115 		}

   117 		[Category("Behavior")]

   118 		public event EventHandler<TreeViewAdvEventArgs> Collapsed;

   119 		private void OnCollapsed(TreeNodeAdv node)

   120 		{

   121 			if (Collapsed != null)

   122 				Collapsed(this, new TreeViewAdvEventArgs(node));

   123 		}

   125 		[Category("Behavior")]

   126 		public event EventHandler<TreeViewAdvEventArgs> Expanding;

   127 		private void OnExpanding(TreeNodeAdv node)

   128 		{

   129 			if (Expanding != null)

   130 				Expanding(this, new TreeViewAdvEventArgs(node));

   131 		}

   133 		[Category("Behavior")]

   134 		public event EventHandler<TreeViewAdvEventArgs> Expanded;

   135 		private void OnExpanded(TreeNodeAdv node)

   136 		{

   137 			if (Expanded != null)

   138 				Expanded(this, new TreeViewAdvEventArgs(node));

   139 		}

   141 		[Category("Behavior")]

   142 		public event EventHandler GridLineStyleChanged;

   143 		private void OnGridLineStyleChanged()

   144 		{

   145 			if (GridLineStyleChanged != null)

   146 				GridLineStyleChanged(this, EventArgs.Empty);

   147 		}

   149 		[Category("Behavior")]

   150 		public event ScrollEventHandler Scroll;

   151 		protected virtual void OnScroll(ScrollEventArgs e)

   152 		{

   153 			if (Scroll != null)

   154 				Scroll(this, e);

   155 		}

   157 		[Category("Behavior")]

   158 		public event EventHandler<TreeViewRowDrawEventArgs> RowDraw;

   159 		protected virtual void OnRowDraw(PaintEventArgs e, TreeNodeAdv node, DrawContext context, int row, Rectangle rowRect)

   160 		{

   161 			if (RowDraw != null)

   162 			{

   163 				TreeViewRowDrawEventArgs args = new TreeViewRowDrawEventArgs(e.Graphics, e.ClipRectangle, node, context, row, rowRect);

   164 				RowDraw(this, args);

   165 			}

   166 		}

   168 		/// <summary>

   169 		/// Fires when control is going to draw. Can be used to change text or back color

   170 		/// </summary>

   171 		[Category("Behavior")]

   172 		public event EventHandler<DrawEventArgs> DrawControl;

   174 		internal bool DrawControlMustBeFired()

   175 		{

   176 			return DrawControl != null;

   177 		}

   179 		internal void FireDrawControl(DrawEventArgs args)

   180 		{

   181 			OnDrawControl(args);

   182 		}

   184 		protected virtual void OnDrawControl(DrawEventArgs args)

   185 		{

   186 			if (DrawControl != null)

   187 				DrawControl(this, args);

   188 		}

   191 		[Category("Drag Drop")]

   192 		public event EventHandler<DropNodeValidatingEventArgs> DropNodeValidating;

   193 		protected virtual void OnDropNodeValidating(Point point, ref TreeNodeAdv node)

   194 		{

   195 			if (DropNodeValidating != null)

   196 			{

   197 				DropNodeValidatingEventArgs args = new DropNodeValidatingEventArgs(point, node);

   198 				DropNodeValidating(this, args);

   199 				node = args.Node;

   200 			}

   201 		}

   202 		#endregion

   204 		public TreeViewAdv()

   205 		{

   206 			InitializeComponent();

   207 			SetStyle(ControlStyles.AllPaintingInWmPaint

   208 				| ControlStyles.UserPaint

   209 				| ControlStyles.OptimizedDoubleBuffer

   210 				| ControlStyles.ResizeRedraw

   211 				| ControlStyles.Selectable

   212 				, true);

   215 			if (Application.RenderWithVisualStyles)

   216 				_columnHeaderHeight = 20;

   217 			else

   218 				_columnHeaderHeight = 17;

   220 			//BorderStyle = BorderStyle.Fixed3D;

   221 			_hScrollBar.Height = SystemInformation.HorizontalScrollBarHeight;

   222 			_vScrollBar.Width = SystemInformation.VerticalScrollBarWidth;

   223 			_rowLayout = new FixedRowHeightLayout(this, RowHeight);

   224 			_rowMap = new List<TreeNodeAdv>();

   225 			_selection = new List<TreeNodeAdv>();

   226 			_readonlySelection = new ReadOnlyCollection<TreeNodeAdv>(_selection);

   227 			_columns = new TreeColumnCollection(this);

   228 			_toolTip = new ToolTip();

   230 			_measureContext = new DrawContext();

   231 			_measureContext.Font = Font;

   232 			_measureContext.Graphics = Graphics.FromImage(new Bitmap(1, 1));

   234 			Input = new NormalInputState(this);

   235 			_search = new IncrementalSearch(this);

   236 			CreateNodes();

   237 			CreatePens();

   239 			ArrangeControls();

   241 			_plusMinus = new NodePlusMinus();

   242 			_controls = new NodeControlsCollection(this);

   244 			Font = _font;

   245 			ExpandingIcon.IconChanged += ExpandingIconChanged;

   246 		}

   248 		void ExpandingIconChanged(object sender, EventArgs e)

   249 		{

   250 			if (IsHandleCreated && !IsDisposed)

   251 				BeginInvoke(new MethodInvoker(DrawIcons));

   252 		}

   254 		private void DrawIcons()

   255 		{

   256 			using (Graphics gr = Graphics.FromHwnd(this.Handle))

   257 			{

   258 				//Apply the same Graphics Transform logic as used in OnPaint.

   259 				int y = 0;

   260 				if (UseColumns)

   261 				{

   262 					y += ColumnHeaderHeight;

   263 					if (Columns.Count == 0)

   264 						return;

   265 				}

   266 				int firstRowY = _rowLayout.GetRowBounds(FirstVisibleRow).Y;

   267 				y -= firstRowY;

   268 				gr.ResetTransform();

   269 				gr.TranslateTransform(-OffsetX, y);

   271 				DrawContext context = new DrawContext();

   272 				context.Graphics = gr;

   273 				for (int i = 0; i < _expandingNodes.Count; i++)

   274 				{

   275 					foreach (NodeControlInfo item in GetNodeControls(_expandingNodes[i]))

   276 					{

   277 						if (item.Control is ExpandingIcon)

   278 						{

   279 							Rectangle bounds = item.Bounds;

   280 							if (item.Node.Parent == null && UseColumns)

   281 								bounds.Location = Point.Empty; // display root expanding icon at 0,0

   283 							context.Bounds = bounds;

   284 							item.Control.Draw(item.Node, context);

   285 						}

   286 					}

   287 				}

   288 			}

   289 		}

   291 		#region Public Methods

   293 		public TreePath GetPath(TreeNodeAdv node)

   294 		{

   295 			if (node == _root)

   296 				return TreePath.Empty;

   297 			else

   298 			{

   299 				Stack<object> stack = new Stack<object>();

   300 				while (node != _root && node != null)

   301 				{

   302 					stack.Push(node.Tag);

   303 					node = node.Parent;

   304 				}

   305 				return new TreePath(stack.ToArray());

   306 			}

   307 		}

   309 		public TreeNodeAdv GetNodeAt(Point point)

   310 		{

   311 			NodeControlInfo info = GetNodeControlInfoAt(point);

   312 			return info.Node;

   313 		}

   315 		public NodeControlInfo GetNodeControlInfoAt(Point point)

   316 		{

   317 			if (point.X < 0 || point.Y < 0)

   318 				return NodeControlInfo.Empty;

   320 			int row = _rowLayout.GetRowAt(point);

   321 			if (row < RowCount && row >= 0)

   322 				return GetNodeControlInfoAt(RowMap[row], point);

   323 			else

   324 				return NodeControlInfo.Empty;

   325 		}

   327 		private NodeControlInfo GetNodeControlInfoAt(TreeNodeAdv node, Point point)

   328 		{

   329 			Rectangle rect = _rowLayout.GetRowBounds(FirstVisibleRow);

   330 			point.Y += (rect.Y - ColumnHeaderHeight);

   331 			point.X += OffsetX;

   332 			foreach (NodeControlInfo info in GetNodeControls(node))

   333 				if (info.Bounds.Contains(point))

   334 					return info;

   336 			if (FullRowSelect)

   337 				return new NodeControlInfo(null, Rectangle.Empty, node);

   338 			else

   339 				return NodeControlInfo.Empty;

   340 		}

   342 		public void BeginUpdate()

   343 		{

   344 			_suspendUpdate = true;

   345 			SuspendSelectionEvent = true;

   346 		}

   348 		public void EndUpdate()

   349 		{

   350 			_suspendUpdate = false;

   351 			if (_needFullUpdate)

   352 				FullUpdate();

   353 			else

   354 				UpdateView();

   355 			SuspendSelectionEvent = false;

   356 		}

   358 		public void ExpandAll()

   359 		{

   360 			_root.ExpandAll();

   361 		}

   363 		public void CollapseAll()

   364 		{

   365 			_root.CollapseAll();

   366 		}

   368 		/// <summary>

   369 		/// Expand all parent nodes, andd scroll to the specified node

   370 		/// </summary>

   371 		public void EnsureVisible(TreeNodeAdv node)

   372 		{

   373 			if (node == null)

   374 				throw new ArgumentNullException("node");

   376 			if (!IsMyNode(node))

   377 				throw new ArgumentException();

   379 			TreeNodeAdv parent = node.Parent;

   380 			while (parent != _root)

   381 			{

   382 				parent.IsExpanded = true;

   383 				parent = parent.Parent;

   384 			}

   385 			ScrollTo(node);

   386 		}

   388 		/// <summary>

   389 		/// Make node visible, scroll if needed. All parent nodes of the specified node must be expanded

   390 		/// </summary>

   391 		/// <param name="node"></param>

   392 		public void ScrollTo(TreeNodeAdv node)

   393 		{

   394 			if (node == null)

   395 				throw new ArgumentNullException("node");

   397 			if (!IsMyNode(node))

   398 				throw new ArgumentException();

   400 			if (node.Row < 0)

   401 				CreateRowMap();

   403 			int row = -1;

   405 			if (node.Row < FirstVisibleRow)

   406 				row = node.Row;

   407 			else

   408 			{

   409 				int pageStart = _rowLayout.GetRowBounds(FirstVisibleRow).Top;

   410 				int rowBottom = _rowLayout.GetRowBounds(node.Row).Bottom;

   411 				if (rowBottom > pageStart + DisplayRectangle.Height - ColumnHeaderHeight)

   412 					row = _rowLayout.GetFirstRow(node.Row);

   413 			}

   415 			if (row >= _vScrollBar.Minimum && row <= _vScrollBar.Maximum)

   416 				_vScrollBar.Value = row;

   417 		}

   419 		public void ClearSelection()

   420 		{

   421 			BeginUpdate();

   422 			try

   423 			{

   424 				ClearSelectionInternal();

   425 			}

   426 			finally

   427 			{

   428 				EndUpdate();

   429 			}

   430 		}

   432 		internal void ClearSelectionInternal()

   433 		{

   434 			while (Selection.Count > 0)

   435 			{

   436 				var t = Selection[0];

   437 				t.IsSelected = false;

   438 				Selection.Remove(t); //hack

   439 			}

   440 		}

   442 		#endregion

   444 		protected override void OnSizeChanged(EventArgs e)

   445 		{

   446 			ArrangeControls();

   447 			SafeUpdateScrollBars();

   448 			base.OnSizeChanged(e);

   449 		}

   451 		private void ArrangeControls()

   452 		{

   453 			int hBarSize = _hScrollBar.Height;

   454 			int vBarSize = _vScrollBar.Width;

   455 			Rectangle clientRect = ClientRectangle;

   457 			_hScrollBar.SetBounds(clientRect.X, clientRect.Bottom - hBarSize,

   458 				clientRect.Width - vBarSize, hBarSize);

   460 			_vScrollBar.SetBounds(clientRect.Right - vBarSize, clientRect.Y,

   461 				vBarSize, clientRect.Height - hBarSize);

   462 		}

   464 		private void SafeUpdateScrollBars()

   465 		{

   466 			if (InvokeRequired)

   467 				BeginInvoke(new MethodInvoker(UpdateScrollBars));

   468 			else

   469 				UpdateScrollBars();

   470 		}

   472 		private void UpdateScrollBars()

   473 		{

   474 			UpdateVScrollBar();

   475 			UpdateHScrollBar();

   476 			UpdateVScrollBar();

   477 			UpdateHScrollBar();

   478 			_hScrollBar.Width = DisplayRectangle.Width;

   479 			_vScrollBar.Height = DisplayRectangle.Height;

   480 		}

   482 		private void UpdateHScrollBar()

   483 		{

   484 			_hScrollBar.Maximum = ContentWidth;

   485 			_hScrollBar.LargeChange = Math.Max(DisplayRectangle.Width, 0);

   486 			_hScrollBar.SmallChange = 5;

   487 			_hScrollBar.Visible = _hScrollBar.LargeChange < _hScrollBar.Maximum;

   488 			_hScrollBar.Value = Math.Min(_hScrollBar.Value, _hScrollBar.Maximum - _hScrollBar.LargeChange + 1);

   489 		}

   491 		private void UpdateVScrollBar()

   492 		{

   493 			_vScrollBar.Maximum = Math.Max(RowCount - 1, 0);

   494 			_vScrollBar.LargeChange = _rowLayout.PageRowCount;

   495 			_vScrollBar.Visible = (RowCount > 0) && (_vScrollBar.LargeChange <= _vScrollBar.Maximum);

   496 			_vScrollBar.Value = Math.Min(_vScrollBar.Value, _vScrollBar.Maximum - _vScrollBar.LargeChange + 1);

   497 		}

   499 		protected override CreateParams CreateParams

   500 		{

   501 			[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]

   502 			get

   503 			{

   504 				CreateParams res = base.CreateParams;

   505 				switch (BorderStyle)

   506 				{

   507 					case BorderStyle.FixedSingle:

   508 						res.Style |= 0x800000;

   509 						break;

   510 					case BorderStyle.Fixed3D:

   511 						res.ExStyle |= 0x200;

   512 						break;

   513 				}

   514 				return res;

   515 			}

   516 		}

   518 		protected override void OnGotFocus(EventArgs e)

   519 		{

   520 			UpdateView();

   521 			ChangeInput();

   522 			base.OnGotFocus(e);

   523 		}

   525 		protected override void OnFontChanged(EventArgs e)

   526 		{

   527 			base.OnFontChanged(e);

   528 			_measureContext.Font = Font;

   529 			FullUpdate();

   530 		}

   532 		internal IEnumerable<NodeControlInfo> GetNodeControls(TreeNodeAdv node)

   533 		{

   534 			if (node == null)

   535 				yield break;

   536 			Rectangle rowRect = _rowLayout.GetRowBounds(node.Row);

   537 			foreach (NodeControlInfo n in GetNodeControls(node, rowRect))

   538 				yield return n;

   539 		}

   541 		internal IEnumerable<NodeControlInfo> GetNodeControls(TreeNodeAdv node, Rectangle rowRect)

   542 		{

   543 			if (node == null)

   544 				yield break;

   546 			int y = rowRect.Y;

   547 			int x = (node.Level - 1) * _indent + LeftMargin;

   548 			int width = 0;

   549 			if (node.Row == 0 && ShiftFirstNode)

   550 				x -= _indent;

   551 			Rectangle rect = Rectangle.Empty;

   553 			if (ShowPlusMinus)

   554 			{

   555 				width = _plusMinus.GetActualSize(node, _measureContext).Width;

   556 				rect = new Rectangle(x, y, width, rowRect.Height);

   557 				if (UseColumns && Columns.Count > 0 && Columns[0].Width < rect.Right)

   558 					rect.Width = Columns[0].Width - x;

   560 				yield return new NodeControlInfo(_plusMinus, rect, node);

   561 				x += width;

   562 			}

   564 			if (!UseColumns)

   565 			{

   566 				foreach (NodeControl c in NodeControls)

   567 				{

   568 					Size s = c.GetActualSize(node, _measureContext);

   569 					if (!s.IsEmpty)

   570 					{

   571 						width = s.Width;

   572 						rect = new Rectangle(x, y, width, rowRect.Height);

   573 						x += rect.Width;

   574 						yield return new NodeControlInfo(c, rect, node);

   575 					}

   576 				}

   577 			}

   578 			else

   579 			{

   580 				int right = 0;

   581 				foreach (TreeColumn col in Columns)

   582 				{

   583 					if (col.IsVisible && col.Width > 0)

   584 					{

   585 						right += col.Width;

   586 						for (int i = 0; i < NodeControls.Count; i++)

   587 						{

   588 							NodeControl nc = NodeControls[i];

   589 							if (nc.ParentColumn == col)

   590 							{

   591 								Size s = nc.GetActualSize(node, _measureContext);

   592 								if (!s.IsEmpty)

   593 								{

   594 									bool isLastControl = true;

   595 									for (int k = i + 1; k < NodeControls.Count; k++)

   596 										if (NodeControls[k].ParentColumn == col)

   597 										{

   598 											isLastControl = false;

   599 											break;

   600 										}

   602 									width = right - x;

   603 									if (!isLastControl)

   604 										width = s.Width;

   605 									int maxWidth = Math.Max(0, right - x);

   606 									rect = new Rectangle(x, y, Math.Min(maxWidth, width), rowRect.Height);

   607 									x += width;

   608 									yield return new NodeControlInfo(nc, rect, node);

   609 								}

   610 							}

   611 						}

   612 						x = right;

   613 					}

   614 				}

   615 			}

   616 		}

   618 		internal static double Dist(Point p1, Point p2)

   619 		{

   620 			return Math.Sqrt(Math.Pow(p1.X - p2.X, 2) + Math.Pow(p1.Y - p2.Y, 2));

   621 		}

   623 		public void FullUpdate()

   624 		{

   625 			HideEditor();

   626 			if (InvokeRequired)

   627 				BeginInvoke(new MethodInvoker(UnsafeFullUpdate));

   628 			else

   629 				UnsafeFullUpdate();

   630 		}

   632 		private void UnsafeFullUpdate()

   633 		{

   634 			_rowLayout.ClearCache();

   635 			CreateRowMap();

   636 			SafeUpdateScrollBars();

   637 			UpdateView();

   638 			_needFullUpdate = false;

   639 		}

   641 		internal void UpdateView()

   642 		{

   643 			if (!_suspendUpdate)

   644 				Invalidate(false);

   645 		}

   647 		internal void UpdateHeaders()

   648 		{

   649 			Invalidate(new Rectangle(0, 0, Width, ColumnHeaderHeight));

   650 		}

   652 		internal void UpdateColumns()

   653 		{

   654 			FullUpdate();

   655 		}

   657 		private void CreateNodes()

   658 		{

   659 			Selection.Clear();

   660 			SelectionStart = null;

   661 			_root = new TreeNodeAdv(this, null);

   662 			_root.IsExpanded = true;

   663 			if (_root.Nodes.Count > 0)

   664 				CurrentNode = _root.Nodes[0];

   665 			else

   666 				CurrentNode = null;

   667 		}

   669 		internal void ReadChilds(TreeNodeAdv parentNode)

   670 		{

   671 			ReadChilds(parentNode, false);

   672 		}

   674 		internal void ReadChilds(TreeNodeAdv parentNode, bool performFullUpdate)

   675 		{

   676 			if (!parentNode.IsLeaf)

   677 			{

   678 				parentNode.IsExpandedOnce = true;

   679 				parentNode.Nodes.Clear();

   681 				if (Model != null)

   682 				{

   683 					IEnumerable items = Model.GetChildren(GetPath(parentNode));

   684 					if (items != null)

   685 						foreach (object obj in items)

   686 						{

   687 							AddNewNode(parentNode, obj, -1);

   688 							if (performFullUpdate)

   689 								FullUpdate();

   690 						}

   691 				}

   693 				if (parentNode.AutoExpandOnStructureChanged)

   694 					parentNode.ExpandAll();

   695 			}

   696 		}

   698 		private void AddNewNode(TreeNodeAdv parent, object tag, int index)

   699 		{

   700 			TreeNodeAdv node = new TreeNodeAdv(this, tag);

   701 			AddNode(parent, index, node);

   702 		}

   704 		private void AddNode(TreeNodeAdv parent, int index, TreeNodeAdv node)

   705 		{

   706 			if (index >= 0 && index < parent.Nodes.Count)

   707 				parent.Nodes.Insert(index, node);

   708 			else

   709 				parent.Nodes.Add(node);

   711 			node.IsLeaf = Model.IsLeaf(GetPath(node));

   712 			if (node.IsLeaf)

   713 				node.Nodes.Clear();

   714 			if (!LoadOnDemand || node.IsExpandedOnce)

   715 				ReadChilds(node);

   716 		}

   718 		private struct ExpandArgs

   719 		{

   720 			public TreeNodeAdv Node;

   721 			public bool Value;

   722 			public bool IgnoreChildren;

   723 		}

   725 		public void AbortBackgroundExpandingThreads()

   726 		{

   727 			_threadPool.CancelAll(true);

   728 			for (int i = 0; i < _expandingNodes.Count; i++)

   729 				_expandingNodes[i].IsExpandingNow = false;

   730 			_expandingNodes.Clear();

   731 			Invalidate();

   732 		}

   734 		internal void SetIsExpanded(TreeNodeAdv node, bool value, bool ignoreChildren)

   735 		{

   736 			ExpandArgs eargs = new ExpandArgs();

   737 			eargs.Node = node;

   738 			eargs.Value = value;

   739 			eargs.IgnoreChildren = ignoreChildren;

   741 			if (AsyncExpanding && LoadOnDemand && !_threadPool.IsMyThread(Thread.CurrentThread))

   742 			{

   743 				WaitCallback wc = delegate(object argument) { SetIsExpanded((ExpandArgs)argument); };

   744 				_threadPool.QueueUserWorkItem(wc, eargs);

   745 			}

   746 			else

   747 				SetIsExpanded(eargs);

   748 		}

   750 		private void SetIsExpanded(ExpandArgs eargs)

   751 		{

   752 			bool update = !eargs.IgnoreChildren && !AsyncExpanding;

   753 			if (update)

   754 				BeginUpdate();

   755 			try

   756 			{

   757 				if (IsMyNode(eargs.Node) && eargs.Node.IsExpanded != eargs.Value)

   758 					SetIsExpanded(eargs.Node, eargs.Value);

   760 				if (!eargs.IgnoreChildren)

   761 					SetIsExpandedRecursive(eargs.Node, eargs.Value);

   762 			}

   763 			finally

   764 			{

   765 				if (update)

   766 					EndUpdate();

   767 			}

   768 		}

   770 		internal void SetIsExpanded(TreeNodeAdv node, bool value)

   771 		{

   772 			if (Root == node && !value)

   773 				return; //Can't collapse root node

   775 			if (value)

   776 			{

   777 				OnExpanding(node);

   778 				node.OnExpanding();

   779 			}

   780 			else

   781 			{

   782 				OnCollapsing(node);

   783 				node.OnCollapsing();

   784 			}

   786 			if (value && !node.IsExpandedOnce)

   787 			{

   788 				if (AsyncExpanding && LoadOnDemand)

   789 				{

   790 					AddExpandingNode(node);

   791 					node.AssignIsExpanded(true);

   792 					Invalidate();

   793 				}

   794 				ReadChilds(node, AsyncExpanding);

   795 				RemoveExpandingNode(node);

   796 			}

   797 			node.AssignIsExpanded(value);

   798 			SmartFullUpdate();

   800 			if (value)

   801 			{

   802 				OnExpanded(node);

   803 				node.OnExpanded();

   804 			}

   805 			else

   806 			{

   807 				OnCollapsed(node);

   808 				node.OnCollapsed();

   809 			}

   810 		}

   812 		private void RemoveExpandingNode(TreeNodeAdv node)

   813 		{

   814 			node.IsExpandingNow = false;

   815 			_expandingNodes.Remove(node);

   816 			if (_expandingNodes.Count <= 0)

   817 				ExpandingIcon.Stop();

   818 		}

   820 		private void AddExpandingNode(TreeNodeAdv node)

   821 		{

   822 			node.IsExpandingNow = true;

   823 			_expandingNodes.Add(node);

   824 			ExpandingIcon.Start();

   825 		}

   827 		internal void SetIsExpandedRecursive(TreeNodeAdv root, bool value)

   828 		{

   829 			for (int i = 0; i < root.Nodes.Count; i++)

   830 			{

   831 				TreeNodeAdv node = root.Nodes[i];

   832 				node.IsExpanded = value;

   833 				SetIsExpandedRecursive(node, value);

   834 			}

   835 		}

   837 		private void CreateRowMap()

   838 		{

   839 			RowMap.Clear();

   840 			int row = 0;

   841 			_contentWidth = 0;

   842 			foreach (TreeNodeAdv node in VisibleNodes)

   843 			{

   844 				node.Row = row;

   845 				RowMap.Add(node);

   846 				if (!UseColumns)

   847 				{

   848 					_contentWidth = Math.Max(_contentWidth, GetNodeWidth(node));

   849 				}

   850 				row++;

   851 			}

   852 			if (UseColumns)

   853 			{

   854 				_contentWidth = 0;

   855 				foreach (TreeColumn col in _columns)

   856 					if (col.IsVisible)

   857 						_contentWidth += col.Width;

   858 			}

   859 		}

   861 		private int GetNodeWidth(TreeNodeAdv node)

   862 		{

   863 			if (node.RightBounds == null)

   864 			{

   865 				Rectangle res = GetNodeBounds(GetNodeControls(node, Rectangle.Empty));

   866 				node.RightBounds = res.Right;

   867 			}

   868 			return node.RightBounds.Value;

   869 		}

   871 		internal Rectangle GetNodeBounds(TreeNodeAdv node)

   872 		{

   873 			return GetNodeBounds(GetNodeControls(node));

   874 		}

   876 		private Rectangle GetNodeBounds(IEnumerable<NodeControlInfo> nodeControls)

   877 		{

   878 			Rectangle res = Rectangle.Empty;

   879 			foreach (NodeControlInfo info in nodeControls)

   880 			{

   881 				if (res == Rectangle.Empty)

   882 					res = info.Bounds;

   883 				else

   884 					res = Rectangle.Union(res, info.Bounds);

   885 			}

   886 			return res;

   887 		}

   889 		private void _vScrollBar_ValueChanged(object sender, EventArgs e)

   890 		{

   891 			FirstVisibleRow = _vScrollBar.Value;

   892 		}

   894 		private void _hScrollBar_ValueChanged(object sender, EventArgs e)

   895 		{

   896 			OffsetX = _hScrollBar.Value;

   897 		}

   899 		private void _vScrollBar_Scroll(object sender, ScrollEventArgs e)

   900 		{

   901 			OnScroll(e);

   902 		}

   904 		private void _hScrollBar_Scroll(object sender, ScrollEventArgs e)

   905 		{

   906 			OnScroll(e);

   907 		}

   909 		internal void SmartFullUpdate()

   910 		{

   911 			if (_suspendUpdate)

   912 				_needFullUpdate = true;

   913 			else

   914 				FullUpdate();

   915 		}

   917 		internal bool IsMyNode(TreeNodeAdv node)

   918 		{

   919 			if (node == null)

   920 				return false;

   922 			if (node.Tree != this)

   923 				return false;

   925 			while (node.Parent != null)

   926 				node = node.Parent;

   928 			return node == _root;

   929 		}

   931 		internal void UpdateSelection()

   932 		{

   933 			bool flag = false;

   935 			if (!IsMyNode(CurrentNode))

   936 				CurrentNode = null;

   937 			if (!IsMyNode(_selectionStart))

   938 				_selectionStart = null;

   940 			for (int i = Selection.Count - 1; i >= 0; i--)

   941 				if (!IsMyNode(Selection[i]))

   942 				{

   943 					flag = true;

   944 					Selection.RemoveAt(i);

   945 				}

   947 			if (flag)

   948 				OnSelectionChanged();

   949 		}

   951 		internal void ChangeColumnWidth(TreeColumn column)

   952 		{

   953 			if (!(_input is ResizeColumnState))

   954 			{

   955 				FullUpdate();

   956 				OnColumnWidthChanged(column);

   957 			}

   958 		}

   960 		public TreeNodeAdv FindNode(TreePath path)

   961 		{

   962 			return FindNode(path, false);

   963 		}

   965 		public TreeNodeAdv FindNode(TreePath path, bool readChilds)

   966 		{

   967 			if (path.IsEmpty())

   968 				return _root;

   969 			else

   970 				return FindNode(_root, path, 0, readChilds);

   971 		}

   973 		private TreeNodeAdv FindNode(TreeNodeAdv root, TreePath path, int level, bool readChilds)

   974 		{

   975 			if (!root.IsExpandedOnce && readChilds)

   976 				ReadChilds(root);

   978 			for (int i = 0; i < root.Nodes.Count; i++)

   979 			{

   980 				TreeNodeAdv node = root.Nodes[i];

   981 				if (node.Tag == path.FullPath[level])

   982 				{

   983 					if (level == path.FullPath.Length - 1)

   984 						return node;

   985 					else

   986 						return FindNode(node, path, level + 1, readChilds);

   987 				}

   988 			}

   989 			return null;

   990 		}

   992 		public TreeNodeAdv FindNodeByTag(object tag)

   993 		{

   994 			return FindNodeByTag(_root, tag);

   995 		}

   997 		private TreeNodeAdv FindNodeByTag(TreeNodeAdv root, object tag)

   998 		{

   999 			foreach (TreeNodeAdv node in root.Nodes)

  1000 			{

  1001 				if (node.Tag == tag)

  1002 					return node;

  1003 				TreeNodeAdv res = FindNodeByTag(node, tag);

  1004 				if (res != null)

  1005 					return res;

  1006 			}

  1007 			return null;

  1008 		}

  1010 		public void SelectAllNodes()

  1011 		{

  1012 			SuspendSelectionEvent = true;

  1013 			try

  1014 			{

  1015 				if (SelectionMode == TreeSelectionMode.MultiSameParent)

  1016 				{

  1017 					if (CurrentNode != null)

  1018 					{

  1019 						foreach (TreeNodeAdv n in CurrentNode.Parent.Nodes)

  1020 							n.IsSelected = true;

  1021 					}

  1022 				}

  1023 				else if (SelectionMode == TreeSelectionMode.Multi)

  1024 				{

  1025 					SelectNodes(Root.Nodes);

  1026 				}

  1027 			}

  1028 			finally

  1029 			{

  1030 				SuspendSelectionEvent = false;

  1031 			}

  1032 		}

  1034 		private void SelectNodes(Collection<TreeNodeAdv> nodes)

  1035 		{

  1036 			foreach (TreeNodeAdv n in nodes)

  1037 			{

  1038 				n.IsSelected = true;

  1039 				if (n.IsExpanded)

  1040 					SelectNodes(n.Nodes);

  1041 			}

  1042 		}

  1044 		#region ModelEvents

  1045 		private void BindModelEvents()

  1046 		{

  1047 			_model.NodesChanged += new EventHandler<TreeModelEventArgs>(_model_NodesChanged);

  1048 			_model.NodesInserted += new EventHandler<TreeModelEventArgs>(_model_NodesInserted);

  1049 			_model.NodesRemoved += new EventHandler<TreeModelEventArgs>(_model_NodesRemoved);

  1050 			_model.StructureChanged += new EventHandler<TreePathEventArgs>(_model_StructureChanged);

  1051 		}

  1053 		private void UnbindModelEvents()

  1054 		{

  1055 			_model.NodesChanged -= new EventHandler<TreeModelEventArgs>(_model_NodesChanged);

  1056 			_model.NodesInserted -= new EventHandler<TreeModelEventArgs>(_model_NodesInserted);

  1057 			_model.NodesRemoved -= new EventHandler<TreeModelEventArgs>(_model_NodesRemoved);

  1058 			_model.StructureChanged -= new EventHandler<TreePathEventArgs>(_model_StructureChanged);

  1059 		}

  1061 		private void _model_StructureChanged(object sender, TreePathEventArgs e)

  1062 		{

  1063 			if (e.Path == null)

  1064 				throw new ArgumentNullException();

  1066 			TreeNodeAdv node = FindNode(e.Path);

  1067 			if (node != null)

  1068 			{

  1069 				if (node != Root)

  1070 					node.IsLeaf = Model.IsLeaf(GetPath(node));

  1072 				var list = new Dictionary<object, object>();

  1073 				SaveExpandedNodes(node, list);

  1074 				ReadChilds(node);

  1075 				RestoreExpandedNodes(node, list);

  1077 				UpdateSelection();

  1078 				SmartFullUpdate();

  1079 			}

  1080 			//else

  1081 			//	throw new ArgumentException("Path not found");

  1082 		}

  1084 		private void RestoreExpandedNodes(TreeNodeAdv node, Dictionary<object, object> list)

  1085 		{

  1086 			if (node.Tag != null && list.ContainsKey(node.Tag))

  1087 			{

  1088 				node.IsExpanded = true;

  1089 				foreach (var child in node.Children)

  1090 					RestoreExpandedNodes(child, list);

  1091 			}

  1092 		}

  1094 		private void SaveExpandedNodes(TreeNodeAdv node, Dictionary<object, object> list)

  1095 		{

  1096 			if (node.IsExpanded && node.Tag != null)

  1097 			{

  1098 				list.Add(node.Tag, null);

  1099 				foreach (var child in node.Children)

  1100 					SaveExpandedNodes(child, list);

  1101 			}

  1102 		}

  1104 		private void _model_NodesRemoved(object sender, TreeModelEventArgs e)

  1105 		{

  1106 			TreeNodeAdv parent = FindNode(e.Path);

  1107 			if (parent != null)

  1108 			{

  1109 				if (e.Indices != null)

  1110 				{

  1111 					List<int> list = new List<int>(e.Indices);

  1112 					list.Sort();

  1113 					for (int n = list.Count - 1; n >= 0; n--)

  1114 					{

  1115 						int index = list[n];

  1116 						if (index >= 0 && index <= parent.Nodes.Count)

  1117 							parent.Nodes.RemoveAt(index);

  1118 						else

  1119 							throw new ArgumentOutOfRangeException("Index out of range");

  1120 					}

  1121 				}

  1122 				else

  1123 				{

  1124 					for (int i = parent.Nodes.Count - 1; i >= 0; i--)

  1125 					{

  1126 						for (int n = 0; n < e.Children.Length; n++)

  1127 							if (parent.Nodes[i].Tag == e.Children[n])

  1128 							{

  1129 								parent.Nodes.RemoveAt(i);

  1130 								break;

  1131 							}

  1132 					}

  1133 				}

  1134 			}

  1135 			UpdateSelection();

  1136 			SmartFullUpdate();

  1137 		}

  1139 		private void _model_NodesInserted(object sender, TreeModelEventArgs e)

  1140 		{

  1141 			if (e.Indices == null)

  1142 				throw new ArgumentNullException("Indices");

  1144 			TreeNodeAdv parent = FindNode(e.Path);

  1145 			if (parent != null)

  1146 			{

  1147 				for (int i = 0; i < e.Children.Length; i++)

  1148 					AddNewNode(parent, e.Children[i], e.Indices[i]);

  1149 			}

  1150 			SmartFullUpdate();

  1151 		}

  1153 		private void _model_NodesChanged(object sender, TreeModelEventArgs e)

  1154 		{

  1155 			TreeNodeAdv parent = FindNode(e.Path);

  1156 			if (parent != null && parent.IsVisible && parent.IsExpanded)

  1157 			{

  1158 				if (InvokeRequired)

  1159 					BeginInvoke(new UpdateContentWidthDelegate(ClearNodesSize), e, parent);

  1160 				else

  1161 					ClearNodesSize(e, parent);

  1162 				SmartFullUpdate();

  1163 			}

  1164 		}

  1166 		private delegate void UpdateContentWidthDelegate(TreeModelEventArgs e, TreeNodeAdv parent);

  1167 		private void ClearNodesSize(TreeModelEventArgs e, TreeNodeAdv parent)

  1168 		{

  1169 			if (e.Indices != null)

  1170 			{

  1171 				foreach (int index in e.Indices)

  1172 				{

  1173 					if (index >= 0 && index < parent.Nodes.Count)

  1174 					{

  1175 						TreeNodeAdv node = parent.Nodes[index];

  1176 						node.Height = node.RightBounds = null;

  1177 					}

  1178 					else

  1179 						throw new ArgumentOutOfRangeException("Index out of range");

  1180 				}

  1181 			}

  1182 			else

  1183 			{

  1184 				foreach (TreeNodeAdv node in parent.Nodes)

  1185 				{

  1186 					foreach (object obj in e.Children)

  1187 						if (node.Tag == obj)

  1188 						{

  1189 							node.Height = node.RightBounds = null;

  1190 						}

  1191 				}

  1192 			}

  1193 		}

  1194 		#endregion

  1195 	}

  1196 }

author	sl
	Thu, 01 Jan 2015 23:35:49 +0100
changeset 405	5715aefd2bcc
permissions	-rw-r--r--