mcs/class/Managed.Windows.Forms/System.Windows.Forms/ToolStripButton.cs

   1 //
   2 // ToolStripButton.cs
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 //
  23 // Copyright (c) 2006 Jonathan Pobst
  24 //
  25 // Authors:
  26 //      Jonathan Pobst (monkey@jpobst.com)
  27 //
  28
  29 #if NET_2_0
  30 using System;
  31 using System.Drawing;
  32 using System.ComponentModel;
  33 using System.Windows.Forms.Design;
  34
  35 namespace System.Windows.Forms
  36 {
  37         [ToolStripItemDesignerAvailability (ToolStripItemDesignerAvailability.ToolStrip)]
  38         public class ToolStripButton : ToolStripItem
  39         {
  40                 private CheckState checked_state;
  41                 private bool check_on_click;
  42
  43                 #region Public Constructors
  44                 public ToolStripButton ()
  45                         : this (null, null, null, String.Empty)
  46                 {
  47                 }
  48
  49                 public ToolStripButton (Image image)
  50                         : this (null, image, null, String.Empty)
  51                 {
  52                 }
  53
  54                 public ToolStripButton (string text)
  55                         : this (text, null, null, String.Empty)
  56                 {
  57                 }
  58
  59                 public ToolStripButton (string text, Image image)
  60                         : this (text, image, null, String.Empty)
  61                 {
  62                 }
  63
  64                 public ToolStripButton (string text, Image image, EventHandler onClick)
  65                         : this (text, image, onClick, String.Empty)
  66                 {
  67                 }
  68
  69                 public ToolStripButton (string text, Image image, EventHandler onClick, string name)
  70                         : base (text, image, onClick, name)
  71                 {
  72                         this.checked_state = CheckState.Unchecked;
  73                         this.ToolTipText = String.Empty;
  74                 }
  75                 #endregion
  76
  77                 #region Public Properties
  78                 [DefaultValue (true)]
  79                 public new bool AutoToolTip {
  80                         get { return base.AutoToolTip; }
  81                         set { base.AutoToolTip = value; }
  82                 }
  83
  84                 public override bool CanSelect {
  85                         get { return true; }
  86                 }
  87
  88                 [DefaultValue (false)]
  89                 public bool Checked {
  90                         get {
  91                                 switch (this.checked_state) {
  92                                         case CheckState.Unchecked:
  93                                         default:
  94                                                 return false;
  95                                         case CheckState.Checked:
  96                                         case CheckState.Indeterminate:
  97                                                 return true;
  98                                 }
  99                         }
 100                         set {
 101                                 if (this.checked_state != (value ? CheckState.Checked : CheckState.Unchecked)) {
 102                                         this.checked_state = value ? CheckState.Checked : CheckState.Unchecked;
 103                                         this.OnCheckedChanged (EventArgs.Empty);
 104                                         this.OnCheckStateChanged (EventArgs.Empty);
 105                                         this.Invalidate ();
 106                                 }
 107                         }
 108                 }
 109
 110                 [DefaultValue (false)]
 111                 public bool CheckOnClick {
 112                         get { return this.check_on_click; }
 113                         set {
 114                                 if (this.check_on_click != value) {
 115                                         this.check_on_click = value;
 116                                         OnUIACheckOnClickChangedEvent (EventArgs.Empty);
 117                                 }
 118                         }
 119                 }
 120
 121                 [DefaultValue (CheckState.Unchecked)]
 122                 public CheckState CheckState {
 123                         get { return this.checked_state; }
 124                         set {
 125                                 if (this.checked_state != value) {
 126                                         if (!Enum.IsDefined (typeof (CheckState), value))
 127                                                 throw new InvalidEnumArgumentException (string.Format ("Enum argument value '{0}' is not valid for CheckState", value));
 128
 129                                         this.checked_state = value;
 130                                         this.OnCheckedChanged (EventArgs.Empty);
 131                                         this.OnCheckStateChanged (EventArgs.Empty);
 132                                         this.Invalidate ();
 133                                 }
 134                         }
 135                 }
 136                 #endregion
 137
 138                 #region Protected Properties
 139                 protected override bool DefaultAutoToolTip { get { return true; } }
 140                 #endregion
 141
 142                 #region Public Methods
 143                 public override Size GetPreferredSize (Size constrainingSize)
 144                 {
 145                         Size retval = base.GetPreferredSize (constrainingSize);
 146
 147                         if (retval.Width < 23)
 148                                 retval.Width = 23;
 149
 150                         return retval;
 151                 }
 152                 #endregion
 153
 154                 #region Protected Methods
 155                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 156                 protected override AccessibleObject CreateAccessibilityInstance ()
 157                 {
 158                         ToolStripItemAccessibleObject ao = new ToolStripItemAccessibleObject (this);
 159
 160                         ao.default_action = "Press";
 161                         ao.role = AccessibleRole.PushButton;
 162                         ao.state = AccessibleStates.Focusable;
 163
 164                         return ao;
 165                 }
 166
 167                 protected virtual void OnCheckedChanged (EventArgs e)
 168                 {
 169                         EventHandler eh = (EventHandler)(Events [CheckedChangedEvent]);
 170                         if (eh != null)
 171                                 eh (this, e);
 172                 }
 173
 174                 protected virtual void OnCheckStateChanged (EventArgs e)
 175                 {
 176                         EventHandler eh = (EventHandler)(Events [CheckStateChangedEvent]);
 177                         if (eh != null)
 178                                 eh (this, e);
 179                 }
 180
 181                 protected override void OnClick (EventArgs e)
 182                 {
 183                         if (this.check_on_click)
 184                                 this.Checked = !this.Checked;
 185
 186                         base.OnClick (e);
 187
 188                         ToolStrip ts = this.GetTopLevelToolStrip ();
 189
 190                         if (ts != null)
 191                                 ts.Dismiss (ToolStripDropDownCloseReason.ItemClicked);
 192                 }
 193
 194                 protected override void OnPaint (System.Windows.Forms.PaintEventArgs e)
 195                 {
 196                         base.OnPaint (e);
 197
 198                         if (this.Owner != null) {
 199                                 Color font_color = this.Enabled ? this.ForeColor : SystemColors.GrayText;
 200                                 Image draw_image = this.Enabled ? this.Image : ToolStripRenderer.CreateDisabledImage (this.Image);
 201
 202                                 this.Owner.Renderer.DrawButtonBackground (new System.Windows.Forms.ToolStripItemRenderEventArgs (e.Graphics, this));
 203
 204                                 Rectangle text_layout_rect;
 205                                 Rectangle image_layout_rect;
 206
 207                                 this.CalculateTextAndImageRectangles (out text_layout_rect, out image_layout_rect);
 208
 209                                 if (text_layout_rect != Rectangle.Empty)
 210                                         this.Owner.Renderer.DrawItemText (new System.Windows.Forms.ToolStripItemTextRenderEventArgs (e.Graphics, this, this.Text, text_layout_rect, font_color, this.Font, this.TextAlign));
 211                                 if (image_layout_rect != Rectangle.Empty)
 212                                         this.Owner.Renderer.DrawItemImage (new System.Windows.Forms.ToolStripItemImageRenderEventArgs (e.Graphics, this, draw_image, image_layout_rect));
 213
 214                                 return;
 215                         }
 216                 }
 217                 #endregion
 218
 219                 #region Public Events
 220                 static object CheckedChangedEvent = new object ();
 221                 static object CheckStateChangedEvent = new object ();
 222
 223                 public event EventHandler CheckedChanged {
 224                         add { Events.AddHandler (CheckedChangedEvent, value); }
 225                         remove { Events.RemoveHandler (CheckedChangedEvent, value); }
 226                 }
 227
 228                 public event EventHandler CheckStateChanged {
 229                         add { Events.AddHandler (CheckStateChangedEvent, value); }
 230                         remove { Events.RemoveHandler (CheckStateChangedEvent, value); }
 231                 }
 232                 #endregion
 233
 234                 #region UIA Framework Events
 235                 static object UIACheckOnClickChangedEvent = new object ();
 236
 237                 internal event EventHandler UIACheckOnClickChanged {
 238                         add { Events.AddHandler (UIACheckOnClickChangedEvent, value); }
 239                         remove { Events.RemoveHandler (UIACheckOnClickChangedEvent, value); }
 240                 }
 241
 242                 internal void OnUIACheckOnClickChangedEvent (EventArgs args)
 243                 {
 244                         EventHandler eh
 245                                 = (EventHandler) Events [UIACheckOnClickChangedEvent];
 246                         if (eh != null)
 247                                 eh (this, args);
 248                 }
 249                 #endregion
 250         }
 251 }
 252 #endif