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External/Aga.Controls/Tree/NodeControls/EditableControl.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 	public abstract class EditableControl : InteractiveControl

    11 	{

    12 		private Timer _timer;

    13 		private bool _editFlag;

    14 

    15 		#region Properties

    16 

    17 		private bool _editOnClick = false;

    18 		[DefaultValue(false)]

    19 		public bool EditOnClick

    20 		{

    21 			get { return _editOnClick; }

    22 			set { _editOnClick = value; }

    23 		}

    24 

    25 		#endregion

    26 

    27 		protected EditableControl()

    28 		{

    29 			_timer = new Timer();

    30 			_timer.Interval = 500;

    31 			_timer.Tick += new EventHandler(TimerTick);

    32 		}

    33 

    34 		private void TimerTick(object sender, EventArgs e)

    35 		{

    36 			_timer.Stop();

    37 			if (_editFlag)

    38 				BeginEdit();

    39 			_editFlag = false;

    40 		}

    41 

    42 		public void SetEditorBounds(EditorContext context)

    43 		{

    44 			Size size = CalculateEditorSize(context);

    45 			context.Editor.Bounds = new Rectangle(context.Bounds.X, context.Bounds.Y,

    46 				Math.Min(size.Width, context.Bounds.Width),

    47 				Math.Min(size.Height, Parent.ClientSize.Height - context.Bounds.Y)

    48 			);

    49 		}

    50 

    51 		protected abstract Size CalculateEditorSize(EditorContext context);

    52 

    53 		protected virtual bool CanEdit(TreeNodeAdv node)

    54 		{

    55 			return (node.Tag != null) && IsEditEnabled(node);

    56 		}

    57 

    58 		public void BeginEdit()

    59 		{

    60 			if (Parent != null && Parent.CurrentNode != null && CanEdit(Parent.CurrentNode))

    61 			{

    62 				CancelEventArgs args = new CancelEventArgs();

    63 				OnEditorShowing(args);

    64 				if (!args.Cancel)

    65 				{

    66 					var editor = CreateEditor(Parent.CurrentNode);

    67 					Parent.DisplayEditor(editor, this);

    68 				}

    69 			}

    70 		}

    71 

    72 		public void EndEdit(bool applyChanges)

    73 		{

    74 			if (Parent != null)

    75 				if (Parent.HideEditor(applyChanges))

    76 					OnEditorHided();

    77 		}

    78 

    79 		public virtual void UpdateEditor(Control control)

    80 		{

    81 		}

    82 

    83 		internal void ApplyChanges(TreeNodeAdv node, Control editor)

    84 		{

    85 			DoApplyChanges(node, editor);

    86 			OnChangesApplied();

    87 		}

    88 

    89 		internal void DoDisposeEditor(Control editor)

    90 		{

    91 			DisposeEditor(editor);

    92 		}

    93 

    94 		protected abstract void DoApplyChanges(TreeNodeAdv node, Control editor);

    95 

    96 		protected abstract Control CreateEditor(TreeNodeAdv node);

    97 

    98 		protected abstract void DisposeEditor(Control editor);

    99 

   100 		public virtual void Cut(Control control)

   101 		{

   102 		}

   103 

   104 		public virtual void Copy(Control control)

   105 		{

   106 		}

   107 

   108 		public virtual void Paste(Control control)

   109 		{

   110 		}

   111 

   112 		public virtual void Delete(Control control)

   113 		{

   114 		}

   115 

   116 		public override void MouseDown(TreeNodeAdvMouseEventArgs args)

   117 		{

   118 			_editFlag = (!EditOnClick && args.Button == MouseButtons.Left

   119 				&& args.ModifierKeys == Keys.None && args.Node.IsSelected);

   120 		}

   121 

   122 		public override void MouseUp(TreeNodeAdvMouseEventArgs args)

   123 		{

   124 			if (args.Node.IsSelected)

   125 			{

   126 				if (EditOnClick && args.Button == MouseButtons.Left && args.ModifierKeys == Keys.None)

   127 				{

   128 					Parent.ItemDragMode = false;

   129 					BeginEdit();

   130 					args.Handled = true;

   131 				}

   132 				else if (_editFlag)// && args.Node.IsSelected)

   133 					_timer.Start();

   134 			}

   135 		}

   136 

   137 		public override void MouseDoubleClick(TreeNodeAdvMouseEventArgs args)

   138 		{

   139 			_editFlag = false;

   140 			_timer.Stop();

   141 		}

   142 

   143 		protected override void Dispose(bool disposing)

   144 		{

   145 			base.Dispose(disposing);

   146 			if (disposing)

   147 				_timer.Dispose();

   148 		}

   149 

   150 		#region Events

   151 

   152 		public event CancelEventHandler EditorShowing;

   153 		protected void OnEditorShowing(CancelEventArgs args)

   154 		{

   155 			if (EditorShowing != null)

   156 				EditorShowing(this, args);

   157 		}

   158 

   159 		public event EventHandler EditorHided;

   160 		protected void OnEditorHided()

   161 		{

   162 			if (EditorHided != null)

   163 				EditorHided(this, EventArgs.Empty);

   164 		}

   165 

   166 		public event EventHandler ChangesApplied;

   167 		protected void OnChangesApplied()

   168 		{

   169 			if (ChangesApplied != null)

   170 				ChangesApplied(this, EventArgs.Empty);

   171 		}

   172 

   173 		#endregion

   174 	}

   175 }
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