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

   1 //
   2 // ToolStripOverflow.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) 2007 Novell
  24 //
  25 // Authors:
  26 //      Jonathan Pobst (monkey@jpobst.com)
  27 //
  28
  29 using System;
  30 using System.Runtime.InteropServices;
  31 using System.ComponentModel;
  32 using System.Drawing;
  33 using System.Windows.Forms.Layout;
  34
  35 namespace System.Windows.Forms
  36 {
  37         [ComVisible (true)]
  38         [ClassInterface (ClassInterfaceType.AutoDispatch)]
  39         public class ToolStripOverflow : ToolStripDropDown, IComponent, IDisposable
  40         {
  41                 private LayoutEngine layout_engine;
  42
  43                 #region Public Constructors
  44                 public ToolStripOverflow (ToolStripItem parentItem)
  45                 {
  46                         this.OwnerItem = parentItem;
  47                 }
  48                 #endregion
  49
  50                 #region Public Properties
  51                 // XXX - This probably adds ToolStripOverflowButton to the returned collection
  52                 public override ToolStripItemCollection Items {
  53                         get { return base.Items; }
  54                 }
  55
  56                 public override LayoutEngine LayoutEngine {
  57                         get {
  58                                 if (this.layout_engine == null)
  59                                         this.layout_engine = new FlowLayout ();
  60
  61                                 return base.LayoutEngine;
  62                         }
  63                 }
  64                 #endregion
  65
  66                 #region Protected Properties
  67                 protected internal override ToolStripItemCollection DisplayedItems {
  68                         get { return base.DisplayedItems; }
  69                 }
  70                 #endregion
  71
  72                 #region Public Methods
  73                 public override Size GetPreferredSize (Size constrainingSize)
  74                 {
  75                         return base.GetToolStripPreferredSize (constrainingSize);
  76                 }
  77                 #endregion
  78
  79                 #region Protected Methods
  80                 protected override AccessibleObject CreateAccessibilityInstance ()
  81                 {
  82                         return new ToolStripOverflowAccessibleObject ();
  83                 }
  84
  85                 [MonoInternalNote ("This should stack in rows of ~3, but for now 1 column will work.")]
  86                 protected override void OnLayout (LayoutEventArgs e)
  87                 {
  88                         SetDisplayedItems ();
  89
  90                         // Find the widest menu item
  91                         int widest = 0;
  92
  93                         foreach (ToolStripItem tsi in this.DisplayedItems) {
  94                                 if (!tsi.Available)
  95                                         continue;
  96                                 if (tsi.GetPreferredSize (Size.Empty).Width > widest)
  97                                         widest = tsi.GetPreferredSize (Size.Empty).Width;
  98                         }
  99
 100                         int x = this.Padding.Left;
 101                         widest += this.Padding.Horizontal;
 102                         int y = this.Padding.Top;
 103
 104                         foreach (ToolStripItem tsi in this.DisplayedItems) {
 105                                 if (!tsi.Available)
 106                                         continue;
 107
 108                                 y += tsi.Margin.Top;
 109
 110                                 int height = 0;
 111
 112                                 if (tsi is ToolStripSeparator)
 113                                         height = 7;
 114                                 else
 115                                         height = tsi.GetPreferredSize (Size.Empty).Height;
 116
 117                                 tsi.SetBounds (new Rectangle (x, y, widest, height));
 118                                 y += tsi.Height + tsi.Margin.Bottom;
 119                         }
 120
 121                         this.Size = new Size (widest + this.Padding.Horizontal, y + this.Padding.Bottom);// + 2);
 122                 }
 123
 124                 protected override void SetDisplayedItems ()
 125                 {
 126                         this.displayed_items.ClearInternal ();
 127
 128                         if (this.OwnerItem != null && this.OwnerItem.Parent != null)
 129                                 foreach (ToolStripItem tsi in this.OwnerItem.Parent.Items)
 130                                         if (tsi.Placement == ToolStripItemPlacement.Overflow && tsi.Available && !(tsi is ToolStripSeparator)) {
 131                                                 this.displayed_items.AddNoOwnerOrLayout (tsi);
 132                                                 //tsi.Parent = this;
 133                                         }
 134
 135                         this.PerformLayout ();
 136                 }
 137                 #endregion
 138
 139                 #region Internal Methods
 140                 internal ToolStrip ParentToolStrip {
 141                         get { return (ToolStrip)this.OwnerItem.Parent; }
 142                 }
 143                 #endregion
 144
 145                 #region ToolStripOverflowAccessibleObject Class
 146                 private class ToolStripOverflowAccessibleObject : AccessibleObject
 147                 {
 148                 }
 149                 #endregion
 150         }
 151 }