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

   1 //
   2 // ToolStripDropDownButton.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.Drawing;
  31 using System.Runtime.InteropServices;
  32 using System.Windows.Forms.Design;
  33 using System.ComponentModel;
  34
  35 namespace System.Windows.Forms
  36 {
  37         [ToolStripItemDesignerAvailability (ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.StatusStrip)]
  38         public class ToolStripDropDownButton : ToolStripDropDownItem
  39         {
  40                 private bool show_drop_down_arrow = true;
  41
  42                 #region Public Constructors
  43                 public ToolStripDropDownButton()
  44                         : this (string.Empty, null, null, string.Empty)
  45                 {
  46                 }
  47
  48                 public ToolStripDropDownButton (Image image)
  49                         : this (string.Empty, image, null, string.Empty)
  50                 {
  51                 }
  52
  53                 public ToolStripDropDownButton (string text)
  54                         : this (text, null, null, string.Empty)
  55                 {
  56                 }
  57
  58                 public ToolStripDropDownButton (string text, Image image)
  59                         : this (text, image, null, string.Empty)
  60                 {
  61                 }
  62
  63                 public ToolStripDropDownButton (string text, Image image, EventHandler onClick)
  64                         : this (text, image, onClick, string.Empty)
  65                 {
  66                 }
  67
  68                 public ToolStripDropDownButton (string text, Image image, params ToolStripItem[] dropDownItems)
  69                         : base (text, image, dropDownItems)
  70                 {
  71                 }
  72
  73                 public ToolStripDropDownButton (string text, Image image, EventHandler onClick, string name)
  74                         : base (text, image, onClick, name)
  75                 {
  76                 }
  77                 #endregion
  78
  79                 #region Public Properties
  80                 [DefaultValue (true)]
  81                 public new bool AutoToolTip {
  82                         get { return base.AutoToolTip; }
  83                         set { base.AutoToolTip = value; }
  84                 }
  85
  86                 [DefaultValue (true)]
  87                 public bool ShowDropDownArrow {
  88                         get { return this.show_drop_down_arrow; }
  89                         set {
  90                                 if (this.show_drop_down_arrow != value) {
  91                                         this.show_drop_down_arrow = value;
  92                                         CalculateAutoSize ();
  93                                 }
  94                         }
  95                 }
  96                 #endregion
  97
  98                 #region Protected Properties
  99                 protected override bool DefaultAutoToolTip {
 100                         get { return true; }
 101                 }
 102                 #endregion
 103
 104                 #region Protected Methods
 105                 protected override ToolStripDropDown CreateDefaultDropDown ()
 106                 {
 107                         ToolStripDropDownMenu tsdd = new ToolStripDropDownMenu ();
 108                         tsdd.OwnerItem = this;
 109                         return tsdd;
 110                 }
 111
 112                 protected override void OnMouseDown (MouseEventArgs e)
 113                 {
 114                         if (e.Button == MouseButtons.Left) {
 115                                 if (this.DropDown.Visible)
 116                                         this.HideDropDown (ToolStripDropDownCloseReason.ItemClicked);
 117                                 else
 118                                         this.ShowDropDown ();
 119                         }
 120
 121                         base.OnMouseDown (e);
 122                 }
 123
 124                 protected override void OnMouseLeave (EventArgs e)
 125                 {
 126                         base.OnMouseLeave (e);
 127                 }
 128
 129                 protected override void OnMouseUp (MouseEventArgs e)
 130                 {
 131                         base.OnMouseUp (e);
 132                 }
 133
 134                 protected override void OnPaint (PaintEventArgs e)
 135                 {
 136                         base.OnPaint (e);
 137
 138                         if (this.Owner != null) {
 139                                 Color font_color = this.Enabled ? this.ForeColor : SystemColors.GrayText;
 140                                 Image draw_image = this.Enabled ? this.Image : ToolStripRenderer.CreateDisabledImage (this.Image);
 141
 142                                 this.Owner.Renderer.DrawDropDownButtonBackground (new System.Windows.Forms.ToolStripItemRenderEventArgs (e.Graphics, this));
 143
 144                                 Rectangle text_layout_rect;
 145                                 Rectangle image_layout_rect;
 146
 147                                 this.CalculateTextAndImageRectangles (out text_layout_rect, out image_layout_rect);
 148
 149                                 if (text_layout_rect != Rectangle.Empty)
 150                                         this.Owner.Renderer.DrawItemText (new System.Windows.Forms.ToolStripItemTextRenderEventArgs (e.Graphics, this, this.Text, text_layout_rect, font_color, this.Font, this.TextAlign));
 151                                 if (image_layout_rect != Rectangle.Empty)
 152                                         this.Owner.Renderer.DrawItemImage (new System.Windows.Forms.ToolStripItemImageRenderEventArgs (e.Graphics, this, draw_image, image_layout_rect));
 153                                 if (this.ShowDropDownArrow)
 154                                         this.Owner.Renderer.DrawArrow (new ToolStripArrowRenderEventArgs (e.Graphics, this, new Rectangle (this.Width - 10, 0, 6, this.Height), Color.Black, ArrowDirection.Down));
 155                                 return;
 156                         }
 157                 }
 158
 159                 protected internal override bool ProcessMnemonic (char charCode)
 160                 {
 161                         if (!this.Selected)
 162                                 this.Parent.ChangeSelection (this);
 163
 164                         if (this.HasDropDownItems)
 165                                 this.ShowDropDown ();
 166                         else
 167                                 this.PerformClick ();
 168
 169                         return true;
 170                 }
 171                 #endregion
 172
 173                 #region Internal Methods
 174                 internal override Size CalculatePreferredSize (Size constrainingSize)
 175                 {
 176                         Size preferred_size = base.CalculatePreferredSize (constrainingSize);
 177
 178                         if (this.ShowDropDownArrow)
 179                                 preferred_size.Width += 9;
 180
 181                         return preferred_size;
 182                 }
 183                 #endregion
 184         }
 185 }
 186 #endif