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

   1 //
   2 // ToolStripMenuItem.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 #if NET_2_0
  29
  30 using System;
  31 using System.Drawing;
  32 using System.ComponentModel;
  33 using System.Windows.Forms.Design;
  34 using System.ComponentModel.Design.Serialization;
  35
  36 namespace System.Windows.Forms
  37 {
  38         [ToolStripItemDesignerAvailability (ToolStripItemDesignerAvailability.MenuStrip | ToolStripItemDesignerAvailability.ContextMenuStrip)]
  39         [DesignerSerializer ("System.Windows.Forms.Design.ToolStripMenuItemCodeDomSerializer, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.Serialization.CodeDomSerializer, " + Consts.AssemblySystem_Design)]
  40         public class ToolStripMenuItem : ToolStripDropDownItem
  41         {
  42                 private CheckState checked_state;
  43                 private bool check_on_click;
  44                 private bool close_on_mouse_release;
  45                 private string shortcut_display_string;
  46                 private Keys shortcut_keys = Keys.None;
  47                 private bool show_shortcut_keys = true;
  48                 private Form mdi_client_form;
  49
  50                 #region Public Constructors
  51                 public ToolStripMenuItem ()
  52                         : this (null, null, null, string.Empty)
  53                 {
  54                 }
  55
  56                 public ToolStripMenuItem (Image image)
  57                         : this (null, image, null, string.Empty)
  58                 {
  59                 }
  60
  61                 public ToolStripMenuItem (string text)
  62                         : this (text, null, null, string.Empty)
  63                 {
  64                 }
  65
  66                 public ToolStripMenuItem (string text, Image image)
  67                         : this (text, image, null, string.Empty)
  68                 {
  69                 }
  70
  71                 public ToolStripMenuItem (string text, Image image, EventHandler onClick)
  72                         : this (text, image, onClick, string.Empty)
  73                 {
  74                 }
  75
  76                 public ToolStripMenuItem (string text, Image image, params ToolStripItem[] dropDownItems)
  77                         : this (text, image, null, string.Empty)
  78                 {
  79                         if (dropDownItems != null)
  80                                 foreach (ToolStripItem tsi in dropDownItems)
  81                                         this.DropDownItems.Add (tsi);
  82                 }
  83
  84                 public ToolStripMenuItem (string text, Image image, EventHandler onClick, Keys shortcutKeys)
  85                         : this (text, image, onClick, string.Empty)
  86                 {
  87                 }
  88
  89                 public ToolStripMenuItem (string text, Image image, EventHandler onClick, string name)
  90                         : base (text, image, onClick, name)
  91                 {
  92                         base.Overflow = ToolStripItemOverflow.Never;
  93                 }
  94                 #endregion
  95
  96                 #region Public Properties
  97                 [Bindable (true)]
  98                 [DefaultValue (false)]
  99                 [RefreshProperties (RefreshProperties.All)]
 100                 public bool Checked {
 101                         get {
 102                                 switch (this.checked_state) {
 103                                         case CheckState.Unchecked:
 104                                         default:
 105                                                 return false;
 106                                         case CheckState.Checked:
 107                                         case CheckState.Indeterminate:
 108                                                 return true;
 109                                 }
 110                         }
 111                         set {
 112                                 if (this.checked_state != (value ? CheckState.Checked : CheckState.Unchecked)) {
 113                                         this.checked_state = value ? CheckState.Checked : CheckState.Unchecked;
 114                                         this.Invalidate ();
 115                                         this.OnCheckedChanged (EventArgs.Empty);
 116                                 }
 117                         }
 118                 }
 119
 120                 [DefaultValue (false)]
 121                 public bool CheckOnClick {
 122                         get { return this.check_on_click; }
 123                         set { this.check_on_click = value; }
 124                 }
 125
 126                 [Bindable (true)]
 127                 [DefaultValue (CheckState.Unchecked)]
 128                 [RefreshProperties (RefreshProperties.All)]
 129                 public CheckState CheckState {
 130                         get { return this.checked_state; }
 131                         set
 132                         {
 133                                 if (!Enum.IsDefined (typeof (CheckState), value))
 134                                         throw new InvalidEnumArgumentException (string.Format ("Enum argument value '{0}' is not valid for CheckState", value));
 135
 136                                 this.checked_state = value;
 137                                 this.Invalidate ();
 138                                 this.OnCheckStateChanged (EventArgs.Empty);
 139                         }
 140                 }
 141
 142                 public override bool Enabled {
 143                         get { return base.Enabled; }
 144                         set { base.Enabled = value; }
 145                 }
 146
 147                 [Browsable (false)]
 148                 public bool IsMdiWindowListEntry {
 149                         get { return this.mdi_client_form != null; }
 150                 }
 151
 152                 [DefaultValue (ToolStripItemOverflow.Never)]
 153                 public new ToolStripItemOverflow Overflow {
 154                         get { return base.Overflow; }
 155                         set { base.Overflow = value; }
 156                 }
 157
 158                 [Localizable (true)]
 159                 [DefaultValue (true)]
 160                 public bool ShowShortcutKeys {
 161                         get { return this.show_shortcut_keys; }
 162                         set { this.show_shortcut_keys = value; }
 163                 }
 164
 165                 [Localizable (true)]
 166                 [DefaultValue (null)]
 167                 public string ShortcutKeyDisplayString {
 168                         get { return this.shortcut_display_string; }
 169                         set { this.shortcut_display_string = value; }
 170                 }
 171
 172                 [Localizable (true)]
 173                 [DefaultValue (Keys.None)]
 174                 public Keys ShortcutKeys {
 175                         get { return this.shortcut_keys; }
 176                         set {
 177                                 if (this.shortcut_keys != value) {
 178                                         this.shortcut_keys = value;
 179
 180                                         if (this.Parent != null)
 181                                                 ToolStripManager.AddToolStripMenuItem (this);
 182                                 }
 183                          }
 184                 }
 185                 #endregion
 186
 187                 #region Protected Properties
 188                 protected internal override Padding DefaultMargin {
 189                         get { return new Padding (0); }
 190                 }
 191
 192                 protected override Padding DefaultPadding {
 193                         get { return new Padding (4, 0, 4, 0); }
 194                 }
 195
 196                 protected override Size DefaultSize {
 197                         get { return new Size (32, 19); }
 198                 }
 199                 #endregion
 200
 201                 #region Protected Methods
 202                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 203                 protected override AccessibleObject CreateAccessibilityInstance ()
 204                 {
 205                         return new ToolStripMenuItemAccessibleObject ();
 206                 }
 207
 208                 protected override ToolStripDropDown CreateDefaultDropDown ()
 209                 {
 210                         ToolStripDropDownMenu tsddm = new ToolStripDropDownMenu ();
 211                         tsddm.OwnerItem = this;
 212                         return tsddm;
 213                 }
 214
 215                 protected override void Dispose (bool disposing)
 216                 {
 217                         base.Dispose (disposing);
 218                 }
 219
 220                 protected virtual void OnCheckedChanged (EventArgs e)
 221                 {
 222                         EventHandler eh = (EventHandler)Events [CheckedChangedEvent];
 223                         if (eh != null)
 224                                 eh (this, e);
 225                 }
 226
 227                 protected virtual void OnCheckStateChanged (EventArgs e)
 228                 {
 229                         EventHandler eh = (EventHandler)Events [CheckStateChangedEvent];
 230                         if (eh != null)
 231                                 eh (this, e);
 232                 }
 233
 234                 protected override void OnClick (EventArgs e)
 235                 {
 236                         if (!this.Enabled)
 237                                 return;
 238
 239                         if (this.HasDropDownItems)
 240                                 return;
 241
 242                         if (this.IsOnDropDown)
 243                                 this.GetTopLevelToolStrip ().Dismiss (ToolStripDropDownCloseReason.ItemClicked);
 244
 245                         if (this.IsMdiWindowListEntry) {
 246                                 this.mdi_client_form.MdiParent.MdiContainer.ActivateChild (this.mdi_client_form);
 247                                 return;
 248                         }
 249
 250                         if (this.check_on_click)
 251                                 this.Checked = !this.Checked;
 252
 253                         base.OnClick (e);
 254                 }
 255
 256                 protected override void OnDropDownHide (EventArgs e)
 257                 {
 258                         base.OnDropDownHide (e);
 259                 }
 260
 261                 protected override void OnDropDownShow (EventArgs e)
 262                 {
 263                         base.OnDropDownShow (e);
 264                 }
 265
 266                 protected override void OnFontChanged (EventArgs e)
 267                 {
 268                         base.OnFontChanged (e);
 269                 }
 270
 271                 protected override void OnMouseDown (MouseEventArgs e)
 272                 {
 273                         if (!this.IsOnDropDown && this.HasDropDownItems && this.DropDown.Visible)
 274                                 this.close_on_mouse_release = true;
 275
 276                         if (this.HasDropDownItems && Enabled)
 277                                 if (!this.DropDown.Visible)
 278                                         this.ShowDropDown ();
 279
 280                         base.OnMouseDown (e);
 281                 }
 282
 283                 protected override void OnMouseEnter (EventArgs e)
 284                 {
 285                         if (this.IsOnDropDown && this.HasDropDownItems && Enabled)
 286                                 this.ShowDropDown ();
 287
 288                         base.OnMouseEnter (e);
 289                 }
 290
 291                 protected override void OnMouseLeave (EventArgs e)
 292                 {
 293                         base.OnMouseLeave (e);
 294                 }
 295
 296                 protected override void OnMouseUp (MouseEventArgs e)
 297                 {
 298                         if (this.close_on_mouse_release) {
 299                                 this.DropDown.Dismiss (ToolStripDropDownCloseReason.ItemClicked);
 300                                 this.Invalidate ();
 301                                 this.close_on_mouse_release = false;
 302
 303                                 if (!this.IsOnDropDown)
 304                                         (this.Parent as MenuStrip).MenuDroppedDown = false;
 305                         }
 306
 307                         if (!this.HasDropDownItems && Enabled)
 308                                 base.OnMouseUp (e);
 309                 }
 310
 311                 protected override void OnOwnerChanged (EventArgs e)
 312                 {
 313                         base.OnOwnerChanged (e);
 314                 }
 315
 316                 protected override void OnPaint (System.Windows.Forms.PaintEventArgs e)
 317                 {
 318                         base.OnPaint (e);
 319
 320                         // Can't render without an owner
 321                         if (this.Owner == null)
 322                                 return;
 323
 324                         // If DropDown.ShowImageMargin is false, we don't display the image
 325                         Image draw_image = this.UseImageMargin ? this.Image : null;
 326
 327                         // Figure out our text color
 328                         Color font_color = this.ForeColor == SystemColors.ControlText ? SystemColors.MenuText : this.ForeColor;
 329
 330                         if ((this.Selected || this.Pressed) && this.IsOnDropDown && font_color == SystemColors.MenuText)
 331                                 font_color = SystemColors.HighlightText;
 332
 333                         if (!this.Enabled && this.ForeColor == SystemColors.ControlText)
 334                                 font_color = SystemColors.GrayText;
 335
 336                         // Gray stuff out if we're disabled
 337                         draw_image = this.Enabled ? draw_image : ToolStripRenderer.CreateDisabledImage (draw_image);
 338
 339                         // Draw our background
 340                         this.Owner.Renderer.DrawMenuItemBackground (new ToolStripItemRenderEventArgs (e.Graphics, this));
 341
 342                         // Figure out where our text and image go
 343                         Rectangle text_layout_rect;
 344                         Rectangle image_layout_rect;
 345
 346                         this.CalculateTextAndImageRectangles (out text_layout_rect, out image_layout_rect);
 347
 348                         if (this.IsOnDropDown) {
 349                                 if (!this.UseImageMargin) {
 350                                         image_layout_rect = Rectangle.Empty;
 351                                         text_layout_rect = new Rectangle (8, text_layout_rect.Top, text_layout_rect.Width, text_layout_rect.Height);
 352                                 } else {
 353                                         text_layout_rect = new Rectangle (35, text_layout_rect.Top, text_layout_rect.Width, text_layout_rect.Height);
 354
 355                                         if (image_layout_rect != Rectangle.Empty)
 356                                                 image_layout_rect = new Rectangle (new Point (4, 3), base.GetImageSize ());
 357                                 }
 358
 359                                 if (this.Checked && this.ShowMargin)
 360                                         this.Owner.Renderer.DrawItemCheck (new ToolStripItemImageRenderEventArgs (e.Graphics, this, new Rectangle (2, 1, 19, 19)));
 361                         }
 362                         if (text_layout_rect != Rectangle.Empty)
 363                                 this.Owner.Renderer.DrawItemText (new ToolStripItemTextRenderEventArgs (e.Graphics, this, this.Text, text_layout_rect, font_color, this.Font, this.TextAlign));
 364
 365                         string key_string = GetShortcutDisplayString ();
 366
 367                         if (!string.IsNullOrEmpty (key_string) && !this.HasDropDownItems) {
 368                                 int offset = 15;
 369                                 Size key_string_size = TextRenderer.MeasureText (key_string, this.Font);
 370                                 Rectangle key_string_rect = new Rectangle (this.ContentRectangle.Right - key_string_size.Width - offset, text_layout_rect.Top, key_string_size.Width, text_layout_rect.Height);
 371                                 this.Owner.Renderer.DrawItemText (new ToolStripItemTextRenderEventArgs (e.Graphics, this, key_string, key_string_rect, font_color, this.Font, this.TextAlign));
 372                         }
 373
 374                         if (image_layout_rect != Rectangle.Empty)
 375                                 this.Owner.Renderer.DrawItemImage (new ToolStripItemImageRenderEventArgs (e.Graphics, this, draw_image, image_layout_rect));
 376
 377                         if (this.IsOnDropDown && this.HasDropDownItems)
 378                                 this.Owner.Renderer.DrawArrow (new ToolStripArrowRenderEventArgs (e.Graphics, this, new Rectangle (this.Bounds.Width - 17, 2, 10, 20), Color.Black, ArrowDirection.Right));
 379                         return;
 380                 }
 381
 382                 protected internal override bool ProcessCmdKey (ref Message m, Keys keyData)
 383                 {
 384                         if (this.Enabled && keyData == this.shortcut_keys) {
 385                                 this.FireEvent (EventArgs.Empty, ToolStripItemEventType.Click);
 386                                 return true;
 387                         }
 388
 389                         return base.ProcessCmdKey (ref m, keyData);
 390                 }
 391
 392                 protected internal override bool ProcessMnemonic (char charCode)
 393                 {
 394                         if (!this.Selected)
 395                                 this.Parent.ChangeSelection (this);
 396
 397                         if (this.HasDropDownItems) {
 398                                 this.ShowDropDown ();
 399                                 this.DropDown.SelectNextToolStripItem (null, true);
 400                         } else
 401                                 this.PerformClick ();
 402
 403                         return true;
 404                 }
 405
 406                 protected internal override void SetBounds (Rectangle bounds)
 407                 {
 408                         base.SetBounds (bounds);
 409                 }
 410                 #endregion
 411
 412                 #region Public Events
 413                 static object CheckedChangedEvent = new object ();
 414                 static object CheckStateChangedEvent = new object ();
 415
 416                 public event EventHandler CheckedChanged {
 417                         add { Events.AddHandler (CheckedChangedEvent, value); }
 418                         remove {Events.RemoveHandler (CheckedChangedEvent, value); }
 419                 }
 420
 421                 public event EventHandler CheckStateChanged {
 422                         add { Events.AddHandler (CheckStateChangedEvent, value); }
 423                         remove {Events.RemoveHandler (CheckStateChangedEvent, value); }
 424                 }
 425                 #endregion
 426
 427                 #region Internal Properties
 428                 internal Form MdiClientForm {
 429                         get { return this.mdi_client_form; }
 430                         set { this.mdi_client_form = value; }
 431                 }
 432                 #endregion
 433
 434                 #region Internal Methods
 435                 internal override Size CalculatePreferredSize (Size constrainingSize)
 436                 {
 437                         Size base_size = base.CalculatePreferredSize (constrainingSize);
 438
 439                         string key_string = GetShortcutDisplayString ();
 440
 441                         if (string.IsNullOrEmpty (key_string))
 442                                 return base_size;
 443
 444                         Size text_size = TextRenderer.MeasureText (key_string, this.Font);
 445
 446                         return new Size (base_size.Width + text_size.Width - 25, base_size.Height);
 447                 }
 448
 449                 internal string GetShortcutDisplayString ()
 450                 {
 451                         if (this.show_shortcut_keys == false)
 452                                 return string.Empty;
 453
 454                         string key_string = string.Empty;
 455
 456                         if (!string.IsNullOrEmpty (this.shortcut_display_string))
 457                                 key_string = this.shortcut_display_string;
 458                         else if (this.shortcut_keys != Keys.None) {
 459                                 KeysConverter kc = new KeysConverter ();
 460                                 key_string = kc.ConvertToString (this.shortcut_keys);
 461                         }
 462
 463                         return key_string;
 464                 }
 465
 466                 internal void HandleAutoExpansion ()
 467                 {
 468                         if (this.HasDropDownItems) {
 469                                 this.ShowDropDown ();
 470                                 this.DropDown.SelectNextToolStripItem (null, true);
 471                         }
 472                 }
 473
 474                 internal override void HandleClick (EventArgs e)
 475                 {
 476                         this.OnClick (e);
 477                 }
 478                 #endregion
 479
 480                 #region ToolStripMenuItemAccessibleObject
 481                 private class ToolStripMenuItemAccessibleObject : AccessibleObject
 482                 {
 483                 }
 484                 #endregion
 485         }
 486 }
 487 #endif