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External/Aga.Controls/Tree/TreeViewAdv.Input.cs
author StephaneLenclud
Mon, 02 Feb 2015 20:58:28 +0100
branchMiniDisplay
changeset 448 10c04c79527e
permissions -rw-r--r--
Sync: Adding shamap and documentation to enable easier sync next time OHM is updated. 
     1 using System;

     2 using System.Collections.Generic;

     3 using System.Text;

     4 using System.Windows.Forms;

     5 using System.Drawing;

     6 using Aga.Controls.Tree.NodeControls;

     7 using System.Drawing.Imaging;

     8 using System.Threading;

     9 

    10 namespace Aga.Controls.Tree

    11 {

    12 	public partial class TreeViewAdv

    13 	{

    14 		#region Keys

    15 

    16 		protected override bool IsInputChar(char charCode)

    17 		{

    18 			return true;

    19 		}

    20 

    21 		protected override bool IsInputKey(Keys keyData)

    22 		{

    23 			if (((keyData & Keys.Up) == Keys.Up)

    24 				|| ((keyData & Keys.Down) == Keys.Down)

    25 				|| ((keyData & Keys.Left) == Keys.Left)

    26 				|| ((keyData & Keys.Right) == Keys.Right))

    27 				return true;

    28 			else

    29 				return base.IsInputKey(keyData);

    30 		}

    31 

    32 		internal void ChangeInput()

    33 		{

    34 			if ((ModifierKeys & Keys.Shift) == Keys.Shift)

    35 			{

    36 				if (!(Input is InputWithShift))

    37 					Input = new InputWithShift(this);

    38 			}

    39 			else if ((ModifierKeys & Keys.Control) == Keys.Control)

    40 			{

    41 				if (!(Input is InputWithControl))

    42 					Input = new InputWithControl(this);

    43 			}

    44 			else

    45 			{

    46 				if (!(Input.GetType() == typeof(NormalInputState)))

    47 					Input = new NormalInputState(this);

    48 			}

    49 		}

    50 

    51 		protected override void OnKeyDown(KeyEventArgs e)

    52 		{

    53 			base.OnKeyDown(e);

    54 			if (!e.Handled)

    55 			{

    56 				if (e.KeyCode == Keys.ShiftKey || e.KeyCode == Keys.ControlKey)

    57 					ChangeInput();

    58 				Input.KeyDown(e);

    59 				if (!e.Handled)

    60 				{

    61 					foreach (NodeControlInfo item in GetNodeControls(CurrentNode))

    62 					{

    63 						item.Control.KeyDown(e);

    64 						if (e.Handled)

    65 							break;

    66 					}

    67 				}

    68 			}

    69 		}

    70 

    71 		protected override void OnKeyUp(KeyEventArgs e)

    72 		{

    73 			base.OnKeyUp(e);

    74 			if (!e.Handled)

    75 			{

    76 				if (e.KeyCode == Keys.ShiftKey || e.KeyCode == Keys.ControlKey)

    77 					ChangeInput();

    78 				if (!e.Handled)

    79 				{

    80 					foreach (NodeControlInfo item in GetNodeControls(CurrentNode))

    81 					{

    82 						item.Control.KeyUp(e);

    83 						if (e.Handled)

    84 							return;

    85 					}

    86 				}

    87 			}

    88 		}

    89 

    90 		protected override void OnKeyPress(KeyPressEventArgs e)

    91 		{

    92 			base.OnKeyPress(e);

    93 			if (!e.Handled)

    94 				_search.Search(e.KeyChar);

    95 		}

    96 

    97 		#endregion

    98 

    99 		#region Mouse

   100 

   101 		private TreeNodeAdvMouseEventArgs CreateMouseArgs(MouseEventArgs e)

   102 		{

   103 			TreeNodeAdvMouseEventArgs args = new TreeNodeAdvMouseEventArgs(e);

   104 			args.ViewLocation = new Point(e.X + OffsetX,

   105 				e.Y + _rowLayout.GetRowBounds(FirstVisibleRow).Y - ColumnHeaderHeight);

   106 			args.ModifierKeys = ModifierKeys;

   107 			args.Node = GetNodeAt(e.Location);

   108 			NodeControlInfo info = GetNodeControlInfoAt(args.Node, e.Location);

   109 			args.ControlBounds = info.Bounds;

   110 			args.Control = info.Control;

   111 			return args;

   112 		}

   113 

   114 		protected override void OnMouseWheel(MouseEventArgs e)

   115 		{

   116 			_search.EndSearch();

   117 			if (SystemInformation.MouseWheelScrollLines > 0)

   118 			{

   119 				int lines = e.Delta / 120 * SystemInformation.MouseWheelScrollLines;

   120 				int newValue = _vScrollBar.Value - lines;

   121 				newValue = Math.Min(_vScrollBar.Maximum - _vScrollBar.LargeChange + 1, newValue);

   122 				newValue = Math.Min(_vScrollBar.Maximum, newValue);

   123 				_vScrollBar.Value = Math.Max(_vScrollBar.Minimum, newValue);

   124 			}

   125 			base.OnMouseWheel(e);

   126 		}

   127 

   128 		protected override void OnMouseDown(MouseEventArgs e)

   129 		{

   130 			if (CurrentEditorOwner != null)

   131 			{

   132 				CurrentEditorOwner.EndEdit(true);

   133 				return;

   134 			}

   135 

   136 			if (!Focused)

   137 				Focus();

   138 

   139 			_search.EndSearch();

   140 			if (e.Button == MouseButtons.Left)

   141 			{

   142 				TreeColumn c;

   143 				c = GetColumnDividerAt(e.Location);

   144 				if (c != null)

   145 				{

   146 					Input = new ResizeColumnState(this, c, e.Location);

   147 					return;

   148 				}

   149 				c = GetColumnAt(e.Location);

   150 				if (c != null)

   151 				{

   152 					Input = new ClickColumnState(this, c, e.Location);

   153 					UpdateView();

   154 					return;

   155 				}

   156 			}

   157 

   158 			ChangeInput();

   159 			TreeNodeAdvMouseEventArgs args = CreateMouseArgs(e);

   160 

   161 			if (args.Node != null && args.Control != null)

   162 				args.Control.MouseDown(args);

   163 

   164 			if (!args.Handled)

   165 				Input.MouseDown(args);

   166 

   167 			base.OnMouseDown(e);

   168 		}

   169 

   170 		protected override void OnMouseClick(MouseEventArgs e)

   171 		{

   172 			//TODO: Disable when click on plusminus icon

   173 			TreeNodeAdvMouseEventArgs args = CreateMouseArgs(e);

   174 			if (args.Node != null)

   175 				OnNodeMouseClick(args);

   176 

   177 			base.OnMouseClick(e);

   178 		}

   179 

   180 		protected override void OnMouseDoubleClick(MouseEventArgs e)

   181 		{

   182 			TreeNodeAdvMouseEventArgs args = CreateMouseArgs(e);

   183 

   184 			if (args.Node != null && args.Control != null)

   185 				args.Control.MouseDoubleClick(args);

   186 

   187 			if (!args.Handled)

   188 			{

   189 				if (args.Node != null)

   190 					OnNodeMouseDoubleClick(args);

   191 				else

   192 					Input.MouseDoubleClick(args);

   193 

   194 				if (!args.Handled)

   195 				{

   196 					if (args.Node != null && args.Button == MouseButtons.Left)

   197 						args.Node.IsExpanded = !args.Node.IsExpanded;

   198 				}

   199 			}

   200 

   201 			base.OnMouseDoubleClick(e);

   202 		}

   203 

   204 		protected override void OnMouseUp(MouseEventArgs e)

   205 		{

   206 			TreeNodeAdvMouseEventArgs args = CreateMouseArgs(e);

   207 			if (Input is ResizeColumnState)

   208 				Input.MouseUp(args);

   209 			else

   210 			{

   211 				if (args.Node != null && args.Control != null)

   212 					args.Control.MouseUp(args);

   213 				if (!args.Handled)

   214 					Input.MouseUp(args);

   215 

   216 				base.OnMouseUp(e);

   217 			}

   218 		}

   219 

   220 		protected override void OnMouseMove(MouseEventArgs e)

   221 		{

   222 			if (Input.MouseMove(e))

   223 				return;

   224 

   225 			base.OnMouseMove(e);

   226 			SetCursor(e);

   227 			UpdateToolTip(e);

   228 			if (ItemDragMode && Dist(e.Location, ItemDragStart) > ItemDragSensivity

   229 				&& CurrentNode != null && CurrentNode.IsSelected)

   230 			{

   231 				ItemDragMode = false;

   232 				_toolTip.Active = false;

   233 				OnItemDrag(e.Button, Selection.ToArray());

   234 			}

   235 		}

   236 

   237 		protected override void OnMouseLeave(EventArgs e)

   238 		{

   239 			_hotColumn = null;

   240 			UpdateHeaders();

   241 			base.OnMouseLeave(e);

   242 		}

   243 

   244 		private void SetCursor(MouseEventArgs e)

   245 		{

   246 			TreeColumn col;

   247 			col = GetColumnDividerAt(e.Location);

   248 			if (col == null)

   249 				_innerCursor = null;

   250 			else

   251 			{

   252 				if (col.Width == 0)

   253 					_innerCursor = ResourceHelper.DVSplitCursor;

   254 				else

   255 					_innerCursor = Cursors.VSplit;

   256 			}

   257 

   258 			col = GetColumnAt(e.Location);

   259 			if (col != _hotColumn)

   260 			{

   261 				_hotColumn = col;

   262 				UpdateHeaders();

   263 			}

   264 		}

   265 

   266 		internal TreeColumn GetColumnAt(Point p)

   267 		{

   268 			if (p.Y > ColumnHeaderHeight)

   269 				return null;

   270 

   271 			int x = -OffsetX;

   272 			foreach (TreeColumn col in Columns)

   273 			{

   274 				if (col.IsVisible)

   275 				{

   276 					Rectangle rect = new Rectangle(x, 0, col.Width, ColumnHeaderHeight);

   277 					x += col.Width;

   278 					if (rect.Contains(p))

   279 						return col;

   280 				}

   281 			}

   282 			return null;

   283 		}

   284 

   285 		internal int GetColumnX(TreeColumn column)

   286 		{

   287 			int x = -OffsetX;

   288 			foreach (TreeColumn col in Columns)

   289 			{

   290 				if (col.IsVisible)

   291 				{

   292 					if (column == col)

   293 						return x;

   294 					else

   295 						x += col.Width;

   296 				}

   297 			}

   298 			return x;

   299 		}

   300 

   301 		internal TreeColumn GetColumnDividerAt(Point p)

   302 		{

   303 			if (p.Y > ColumnHeaderHeight)

   304 				return null;

   305 

   306 			int x = -OffsetX;

   307 			TreeColumn prevCol = null;

   308 			Rectangle left, right;

   309 			foreach (TreeColumn col in Columns)

   310 			{

   311 				if (col.IsVisible)

   312 				{

   313 					if (col.Width > 0)

   314 					{

   315 						left = new Rectangle(x, 0, DividerWidth / 2, ColumnHeaderHeight);

   316 						right = new Rectangle(x + col.Width - (DividerWidth / 2), 0, DividerWidth / 2, ColumnHeaderHeight);

   317 						if (left.Contains(p) && prevCol != null)

   318 							return prevCol;

   319 						else if (right.Contains(p))

   320 							return col;

   321 					}

   322 					prevCol = col;

   323 					x += col.Width;

   324 				}

   325 			}

   326 

   327 			left = new Rectangle(x, 0, DividerWidth / 2, ColumnHeaderHeight);

   328 			if (left.Contains(p) && prevCol != null)

   329 				return prevCol;

   330 

   331 			return null;

   332 		}

   333 

   334 		TreeColumn _tooltipColumn;

   335 		private void UpdateToolTip(MouseEventArgs e)

   336 		{

   337 			TreeColumn col = GetColumnAt(e.Location);

   338 			if (col != null)

   339 			{

   340 				if (col != _tooltipColumn)

   341 					SetTooltip(col.TooltipText);

   342 			}

   343 			else

   344 				DisplayNodesTooltip(e);

   345 			_tooltipColumn = col;

   346 		}

   347 

   348 		TreeNodeAdv _hotNode;

   349 		NodeControl _hotControl;

   350 		private void DisplayNodesTooltip(MouseEventArgs e)

   351 		{

   352 			if (ShowNodeToolTips)

   353 			{

   354 				TreeNodeAdvMouseEventArgs args = CreateMouseArgs(e);

   355 				if (args.Node != null && args.Control != null)

   356 				{

   357 					if (args.Node != _hotNode || args.Control != _hotControl)

   358 						SetTooltip(GetNodeToolTip(args));

   359 				}

   360 				else

   361 					_toolTip.SetToolTip(this, null);

   362 

   363 				_hotControl = args.Control;

   364 				_hotNode = args.Node;

   365 			}

   366 			else

   367 				_toolTip.SetToolTip(this, null);

   368 		}

   369 

   370 		private void SetTooltip(string text)

   371 		{

   372 			if (!String.IsNullOrEmpty(text))

   373 			{

   374 				_toolTip.Active = false;

   375 				_toolTip.SetToolTip(this, text);

   376 				_toolTip.Active = true;

   377 			}

   378 			else

   379 				_toolTip.SetToolTip(this, null);

   380 		}

   381 

   382 		private string GetNodeToolTip(TreeNodeAdvMouseEventArgs args)

   383 		{

   384 			string msg = args.Control.GetToolTip(args.Node);

   385 

   386 			BaseTextControl btc = args.Control as BaseTextControl;

   387 			if (btc != null && btc.DisplayHiddenContentInToolTip && String.IsNullOrEmpty(msg))

   388 			{

   389 				Size ms = btc.GetActualSize(args.Node, _measureContext);

   390 				if (ms.Width > args.ControlBounds.Size.Width || ms.Height > args.ControlBounds.Size.Height

   391 					|| args.ControlBounds.Right - OffsetX > DisplayRectangle.Width)

   392 					msg = btc.GetLabel(args.Node);

   393 			}

   394 

   395 			if (String.IsNullOrEmpty(msg) && DefaultToolTipProvider != null)

   396 				msg = DefaultToolTipProvider.GetToolTip(args.Node, args.Control);

   397 

   398 			return msg;

   399 		}

   400 

   401 		#endregion

   402 

   403 		#region DragDrop

   404 

   405 		private bool _dragAutoScrollFlag = false;

   406 		private Bitmap _dragBitmap = null;

   407 		private System.Threading.Timer _dragTimer;

   408 

   409 		private void StartDragTimer()

   410 		{

   411 			if (_dragTimer == null)

   412 				_dragTimer = new System.Threading.Timer(new TimerCallback(DragTimerTick), null, 0, 100);

   413 		}

   414 

   415 		private void StopDragTimer()

   416 		{

   417 			if (_dragTimer != null)

   418 			{

   419 				_dragTimer.Dispose();

   420 				_dragTimer = null;

   421 			}

   422 		}

   423 

   424 		private void SetDropPosition(Point pt)

   425 		{

   426 			TreeNodeAdv node = GetNodeAt(pt);

   427 			OnDropNodeValidating(pt, ref node);

   428 			_dropPosition.Node = node;

   429 			if (node != null)

   430 			{

   431 				Rectangle first = _rowLayout.GetRowBounds(FirstVisibleRow);

   432 				Rectangle bounds = _rowLayout.GetRowBounds(node.Row);

   433 				float pos = (pt.Y + first.Y - ColumnHeaderHeight - bounds.Y) / (float)bounds.Height;

   434 				if (pos < TopEdgeSensivity)

   435 					_dropPosition.Position = NodePosition.Before;

   436 				else if (pos > (1 - BottomEdgeSensivity))

   437 					_dropPosition.Position = NodePosition.After;

   438 				else

   439 					_dropPosition.Position = NodePosition.Inside;

   440 			}

   441 		}

   442 

   443 		private void DragTimerTick(object state)

   444 		{

   445 			_dragAutoScrollFlag = true;

   446 		}

   447 

   448 		private void DragAutoScroll()

   449 		{

   450 			_dragAutoScrollFlag = false;

   451 			Point pt = PointToClient(MousePosition);

   452 			if (pt.Y < 20 && _vScrollBar.Value > 0)

   453 				_vScrollBar.Value--;

   454 			else if (pt.Y > Height - 20 && _vScrollBar.Value <= _vScrollBar.Maximum - _vScrollBar.LargeChange)

   455 				_vScrollBar.Value++;

   456 		}

   457 

   458 		public void DoDragDropSelectedNodes(DragDropEffects allowedEffects)

   459 		{

   460 			if (SelectedNodes.Count > 0)

   461 			{

   462 				TreeNodeAdv[] nodes = new TreeNodeAdv[SelectedNodes.Count];

   463 				SelectedNodes.CopyTo(nodes, 0);

   464 				DoDragDrop(nodes, allowedEffects);

   465 			}

   466 		}

   467 

   468 		private void CreateDragBitmap(IDataObject data)

   469 		{

   470 			if (UseColumns || !DisplayDraggingNodes)

   471 				return;

   472 

   473 			TreeNodeAdv[] nodes = data.GetData(typeof(TreeNodeAdv[])) as TreeNodeAdv[];

   474 			if (nodes != null && nodes.Length > 0)

   475 			{

   476 				Rectangle rect = DisplayRectangle;

   477 				Bitmap bitmap = new Bitmap(rect.Width, rect.Height);

   478 				using (Graphics gr = Graphics.FromImage(bitmap))

   479 				{

   480 					gr.Clear(BackColor);

   481 					DrawContext context = new DrawContext();

   482 					context.Graphics = gr;

   483 					context.Font = Font;

   484 					context.Enabled = true;

   485 					int y = 0;

   486 					int maxWidth = 0;

   487 					foreach (TreeNodeAdv node in nodes)

   488 					{

   489 						if (node.Tree == this)

   490 						{

   491 							int x = 0;

   492 							int height = _rowLayout.GetRowBounds(node.Row).Height;

   493 							foreach (NodeControl c in NodeControls)

   494 							{

   495 								Size s = c.GetActualSize(node, context);

   496 								if (!s.IsEmpty)

   497 								{

   498 									int width = s.Width;

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

   500 									x += (width + 1);

   501 									context.Bounds = rect;

   502 									c.Draw(node, context);

   503 								}

   504 							}

   505 							y += height;

   506 							maxWidth = Math.Max(maxWidth, x);

   507 						}

   508 					}

   509 

   510 					if (maxWidth > 0 && y > 0)

   511 					{

   512 						_dragBitmap = new Bitmap(maxWidth, y, PixelFormat.Format32bppArgb);

   513 						using (Graphics tgr = Graphics.FromImage(_dragBitmap))

   514 							tgr.DrawImage(bitmap, Point.Empty);

   515 						BitmapHelper.SetAlphaChanelValue(_dragBitmap, 150);

   516 					}

   517 					else

   518 						_dragBitmap = null;

   519 				}

   520 			}

   521 		}

   522 

   523 		protected override void OnDragOver(DragEventArgs drgevent)

   524 		{

   525 			ItemDragMode = false;

   526 			Point pt = PointToClient(new Point(drgevent.X, drgevent.Y));

   527 			if (_dragAutoScrollFlag)

   528 				DragAutoScroll();

   529 			SetDropPosition(pt);

   530 			UpdateView();

   531 			base.OnDragOver(drgevent);

   532 		}

   533 

   534 		protected override void OnDragEnter(DragEventArgs drgevent)

   535 		{

   536 			_search.EndSearch();

   537 			DragMode = true;

   538 			CreateDragBitmap(drgevent.Data);

   539 			base.OnDragEnter(drgevent);

   540 		}

   541 

   542 		protected override void OnDragLeave(EventArgs e)

   543 		{

   544 			DragMode = false;

   545 			UpdateView();

   546 			base.OnDragLeave(e);

   547 		}

   548 

   549 		protected override void OnDragDrop(DragEventArgs drgevent)

   550 		{

   551 			DragMode = false;

   552 			UpdateView();

   553 			base.OnDragDrop(drgevent);

   554 		}

   555 

   556 		#endregion

   557 	}

   558 }
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