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External/Aga.Controls/Tree/NodeControls/NodeControl.cs
author sl
Thu, 01 Jan 2015 23:35:49 +0100
changeset 405 5715aefd2bcc
permissions -rw-r--r--
SharpDisplay: Migrating to new robust client scheme. 
     1 using System;

     2 using System.Collections.Generic;

     3 using System.Text;

     4 using System.Windows.Forms;

     5 using System.Drawing;

     6 using System.ComponentModel;

     7 

     8 namespace Aga.Controls.Tree.NodeControls

     9 {

    10 	[DesignTimeVisible(false), ToolboxItem(false)]

    11 	public abstract class NodeControl : Component

    12 	{

    13 		#region Properties

    14 

    15 		private TreeViewAdv _parent;

    16 		[Browsable(false)]

    17 		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]

    18 		public TreeViewAdv Parent

    19 		{

    20 			get { return _parent; }

    21 			set 

    22 			{

    23 				if (value != _parent)

    24 				{

    25 					if (_parent != null)

    26 						_parent.NodeControls.Remove(this);

    27 

    28 					if (value != null)

    29 						value.NodeControls.Add(this);

    30 				}

    31 			}

    32 		}

    33 

    34 		private IToolTipProvider _toolTipProvider;

    35 		[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]

    36 		public IToolTipProvider ToolTipProvider

    37 		{

    38 			get { return _toolTipProvider; }

    39 			set { _toolTipProvider = value; }

    40 		}

    41 

    42 		private TreeColumn _parentColumn;

    43 		public TreeColumn ParentColumn

    44 		{

    45 			get { return _parentColumn; }

    46 			set 

    47 			{ 

    48 				_parentColumn = value; 

    49 				if (_parent != null)

    50 					_parent.FullUpdate();

    51 			}

    52 		}

    53 

    54 		private VerticalAlignment _verticalAlign = VerticalAlignment.Center;

    55 		[DefaultValue(VerticalAlignment.Center)]

    56 		public VerticalAlignment VerticalAlign

    57 		{

    58 			get { return _verticalAlign; }

    59 			set 

    60 			{ 

    61 				_verticalAlign = value;

    62 				if (_parent != null)

    63 					_parent.FullUpdate();

    64 			}

    65 		}

    66 

    67 		private int _leftMargin = 0;

    68 		public int LeftMargin

    69 		{

    70 			get { return _leftMargin; }

    71 			set 

    72 			{

    73 				if (value < 0)

    74 					throw new ArgumentOutOfRangeException();

    75 

    76 				_leftMargin = value;

    77 				if (_parent != null)

    78 					_parent.FullUpdate();

    79 			}

    80 		}

    81 		#endregion

    82 

    83 		internal virtual void AssignParent(TreeViewAdv parent)

    84 		{

    85 			_parent = parent;

    86 		}

    87 

    88 		protected virtual Rectangle GetBounds(TreeNodeAdv node, DrawContext context)

    89 		{

    90 			Rectangle r = context.Bounds;

    91 			Size s = GetActualSize(node, context);

    92 			Size bs = new Size(r.Width - LeftMargin, Math.Min(r.Height, s.Height));

    93 			switch (VerticalAlign)

    94 			{

    95 				case VerticalAlignment.Top:

    96 					return new Rectangle(new Point(r.X + LeftMargin, r.Y), bs);

    97 				case VerticalAlignment.Bottom:

    98 					return new Rectangle(new Point(r.X + LeftMargin, r.Bottom - s.Height), bs);

    99 				default:

   100 					return new Rectangle(new Point(r.X + LeftMargin, r.Y + (r.Height - s.Height) / 2), bs);

   101 			}

   102 		}

   103 

   104 		protected void CheckThread()

   105 		{

   106 			if (Parent != null && Control.CheckForIllegalCrossThreadCalls)

   107 				if (Parent.InvokeRequired)

   108 					throw new InvalidOperationException("Cross-thread calls are not allowed");

   109 		}

   110 

   111 		public bool IsVisible(TreeNodeAdv node)

   112 		{

   113 			NodeControlValueEventArgs args = new NodeControlValueEventArgs(node);

   114 			args.Value = true;

   115 			OnIsVisibleValueNeeded(args);

   116 			return Convert.ToBoolean(args.Value);

   117 		}

   118 

   119 		internal Size GetActualSize(TreeNodeAdv node, DrawContext context)

   120 		{

   121 			if (IsVisible(node))

   122 			{

   123 				Size s = MeasureSize(node, context);

   124 				return new Size(s.Width + LeftMargin, s.Height);

   125 			}

   126 			else

   127 				return Size.Empty;

   128 		}

   129 

   130 		public abstract Size MeasureSize(TreeNodeAdv node, DrawContext context);

   131 

   132 		public abstract void Draw(TreeNodeAdv node, DrawContext context);

   133 

   134 		public virtual string GetToolTip(TreeNodeAdv node)

   135 		{

   136 			if (ToolTipProvider != null)

   137 				return ToolTipProvider.GetToolTip(node, this);

   138 			else

   139 				return string.Empty;

   140 		}

   141 

   142 		public virtual void MouseDown(TreeNodeAdvMouseEventArgs args)

   143 		{

   144 		}

   145 

   146 		public virtual void MouseUp(TreeNodeAdvMouseEventArgs args)

   147 		{

   148 		}

   149 

   150 		public virtual void MouseDoubleClick(TreeNodeAdvMouseEventArgs args)

   151 		{

   152 		}

   153 

   154 		public virtual void KeyDown(KeyEventArgs args)

   155 		{

   156 		}

   157 

   158 		public virtual void KeyUp(KeyEventArgs args)

   159 		{

   160 		}

   161 

   162 		public event EventHandler<NodeControlValueEventArgs> IsVisibleValueNeeded;

   163 		protected virtual void OnIsVisibleValueNeeded(NodeControlValueEventArgs args)

   164 		{

   165 			if (IsVisibleValueNeeded != null)

   166 				IsVisibleValueNeeded(this, args);

   167 		}

   168 	}

   169 }
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