mcs/class/System.Windows.Forms/System.Windows.Forms/Button.cs

   1 //\r
   2 // System.Windows.Forms.Button.cs\r
   3 //\r
   4 // Author:\r
   5 //   stubbed out by Jaak Simm (jaaksimm@firm.ee)\r
   6 //        implemented for Gtk+ by Rachel Hestilow (hestilow@ximian.com)\r
   7 //      Dennis Hayes (dennish@raytek.com)\r
   8 //   WINELib implementation started by John Sohn (jsohn@columbus.rr.com)\r
   9 //\r
  10 // (C) Ximian, Inc., 2002\r
  11 //\r
  12 \r
  13 using System.Drawing;\r
  14 using System.Runtime.InteropServices;\r
  15 \r
  16 namespace System.Windows.Forms {\r
  17 \r
  18         /// <summary>\r
  19         /// Represents a Windows button control.\r
  20         /// </summary>\r
  21 \r
  22         public class Button : ButtonBase, IButtonControl {\r
  23 \r
  24                 // private fields\r
  25                 DialogResult dialogResult;\r
  26                 bool MouseIsOver_;\r
  27 \r
  28                 // --- Constructor ---\r
  29                 public Button() : base()\r
  30                 {\r
  31                         dialogResult = DialogResult.None;\r
  32                         MouseIsOver_ = false;\r
  33                         SubClassWndProc_ = true;\r
  34                 }\r
  35                 \r
  36                 // --- Properties ---\r
  37                 protected override CreateParams CreateParams {\r
  38                         get {\r
  39                                 // This is a child control, so it must have a parent for creation\r
  40                                 if( Parent != null) {\r
  41                                         CreateParams createParams = new CreateParams ();\r
  42                                         // CHECKME: here we must not overwrite window\r
  43                                         if( window == null) {\r
  44                                                 window = new ControlNativeWindow (this);\r
  45                                         }\r
  46 \r
  47                                         createParams.Caption = Text;\r
  48                                         createParams.ClassName = "BUTTON";\r
  49                                         createParams.X = Left;\r
  50                                         createParams.Y = Top;\r
  51                                         createParams.Width = Width;\r
  52                                         createParams.Height = Height;\r
  53                                         createParams.ClassStyle = 0;\r
  54                                         createParams.ExStyle = 0;\r
  55                                         createParams.Param = 0;\r
  56                                         createParams.Parent = Parent.Handle;\r
  57                                         createParams.Style = (int) (\r
  58                                                 WindowStyles.WS_CHILD | \r
  59                                                 WindowStyles.WS_VISIBLE |\r
  60                                                 WindowStyles.WS_CLIPSIBLINGS );\r
  61                                         if(FlatStyle != FlatStyle.System) {\r
  62                                                 createParams.Style |= (int) ButtonStyles.BS_OWNERDRAW;\r
  63                                         }\r
  64                                         createParams.Style |= (int)sysButtonStyles_;\r
  65                                         // CHECKME : this call is commented because (IMHO) Control.CreateHandle suppose to do this\r
  66                                         // and this function is CreateParams, not CreateHandle\r
  67                                         // window.CreateHandle (createParams);\r
  68                                         return createParams;\r
  69                                 }\r
  70                                 return null;\r
  71                         }\r
  72                 }\r
  73                 \r
  74                 // --- IButtonControl property ---\r
  75                 public virtual DialogResult DialogResult {\r
  76                         get { return dialogResult; }\r
  77                         set { dialogResult = value; }\r
  78                 }\r
  79 \r
  80                 // --- IButtonControl method ---\r
  81                 [MonoTODO]\r
  82                 public virtual void NotifyDefault(bool value) \r
  83                 {\r
  84                         //FIXME:\r
  85                 }\r
  86                 \r
  87                 [MonoTODO]\r
  88                 public void PerformClick() \r
  89                 {\r
  90                         //FIXME:\r
  91                 }\r
  92                 \r
  93                 // --- Button methods for events ---\r
  94                 protected override void OnClick(EventArgs e) \r
  95                 {\r
  96                         base.OnClick (e);\r
  97                 }\r
  98                 \r
  99                 protected override void OnMouseUp(MouseEventArgs e) \r
 100                 {\r
 101                         base.OnMouseUp (e);\r
 102                 }\r
 103                 \r
 104                 // --- Button methods ---\r
 105                 protected override bool ProcessMnemonic (char charCode) \r
 106                 {\r
 107                         return base.ProcessMnemonic (charCode);\r
 108                 }\r
 109 \r
 110                 [MonoTODO]\r
 111                 public override string ToString ()\r
 112                 {\r
 113                         return base.ToString();\r
 114                 }\r
 115 \r
 116                 protected override void OnMouseEnter (EventArgs e) {\r
 117                         base.OnMouseEnter(e);\r
 118                         if( FlatStyle == FlatStyle.Flat || FlatStyle == FlatStyle.Popup) {\r
 119                                 Invalidate();\r
 120                         }\r
 121                 }\r
 122     \r
 123                 protected override void OnMouseLeave (EventArgs e) {\r
 124                         base.OnMouseLeave(e);\r
 125                         if( FlatStyle == FlatStyle.Flat || FlatStyle == FlatStyle.Popup) {\r
 126                                 Invalidate();\r
 127                         }\r
 128                 }\r
 129 \r
 130                 internal void OnDrawItem(DrawItemEventArgs e) {\r
 131                         Graphics paintOn = e.Graphics;\r
 132                         Rectangle rc = e.Bounds;\r
 133                         Rectangle rcImageClip = e.Bounds;\r
 134                         rcImageClip.Inflate(-2,-2);\r
 135 \r
 136                         if( FlatStyle == FlatStyle.Flat) {\r
 137                                 if( (e.State & DrawItemState.Selected) != 0) {\r
 138                                         SolidBrush sb = new SolidBrush(ControlPaint.Light(SystemColors.Control));\r
 139                                         paintOn.FillRectangle(sb, rc);\r
 140                                         sb.Dispose();\r
 141                                 }\r
 142                                 else {\r
 143                                         if( mouseIsInside_) {\r
 144                                                 SolidBrush sb = new SolidBrush(ControlPaint.Dark(SystemColors.Control));\r
 145                                                 paintOn.FillRectangle(sb, rc);\r
 146                                                 sb.Dispose();\r
 147                                         }\r
 148                                         else {\r
 149                                                 paintOn.FillRectangle(SystemBrushes.Control, rc);\r
 150                                         }\r
 151                                 }\r
 152 \r
 153                                 ControlPaint.DrawBorder(paintOn, rc, SystemColors.ControlText, ButtonBorderStyle.Solid);\r
 154                                 rc.Inflate(-1,-1);\r
 155 \r
 156                                 if( (e.State & DrawItemState.Focus) != 0) {\r
 157                                         ControlPaint.DrawBorder(paintOn, rc, SystemColors.ControlText, ButtonBorderStyle.Solid);\r
 158                                 }\r
 159                                 else {\r
 160                                         rcImageClip.Inflate(1,1);\r
 161                                 }\r
 162                                 rc.Inflate(-3,-3);\r
 163                         }\r
 164                         else if( FlatStyle == FlatStyle.Popup) {\r
 165                                 if( (e.State & DrawItemState.Selected) != 0) {\r
 166                                         ControlPaint.DrawBorder(paintOn, rc, SystemColors.ControlText, ButtonBorderStyle.Solid);\r
 167                                         rc.Inflate(-1,-1);\r
 168                                         ControlPaint.DrawBorder(paintOn, rc, SystemColors.ControlText, ButtonBorderStyle.Solid);\r
 169                                         rc.Inflate(-1,-1);\r
 170                                 }\r
 171                                 else {\r
 172                                         if( (e.State & DrawItemState.Focus) != 0) {\r
 173                                                 ControlPaint.DrawBorder(paintOn, rc, SystemColors.ControlText, ButtonBorderStyle.Solid);\r
 174                                                 rc.Inflate(-1,-1);\r
 175                                         }\r
 176 \r
 177                                         if( mouseIsInside_) {\r
 178                                                 Color colorLight = ControlPaint.Light(SystemColors.Control);\r
 179                                                 ControlPaint.DrawBorder(paintOn, rc, colorLight, 1, ButtonBorderStyle.Solid,\r
 180                                                         colorLight, 1, ButtonBorderStyle.Solid, SystemColors.ControlText, 1, ButtonBorderStyle.Solid,\r
 181                                                         SystemColors.ControlText, 1, ButtonBorderStyle.Solid);\r
 182                                         }\r
 183                                         else {\r
 184                                                 ControlPaint.DrawBorder(paintOn, rc, SystemColors.ControlText, ButtonBorderStyle.Solid);\r
 185                                         }\r
 186                                         rc.Inflate(-2,-2);\r
 187                                 }\r
 188                                 paintOn.FillRectangle(SystemBrushes.Control, rc);\r
 189 \r
 190                                 rc.Inflate(-1,-1);\r
 191                         }\r
 192                         else {\r
 193                                 ButtonState     btnState = ButtonState.Normal;\r
 194 \r
 195                                 if( (e.State & DrawItemState.Selected) != 0) {\r
 196                                         btnState = ButtonState.Pushed;\r
 197                                 }\r
 198 \r
 199                                 ControlPaint.DrawButton(paintOn, rc, btnState);\r
 200 \r
 201                                 rc.Inflate(-2,-2);\r
 202                         }\r
 203 \r
 204                         // Do not place Text and Images on the borders \r
 205                         paintOn.Clip = new Region(rcImageClip);\r
 206                         if( BackgroundImage != null) {\r
 207                                 paintOn.DrawImage(BackgroundImage, e.Bounds.X, e.Bounds.Y, BackgroundImage.Width, BackgroundImage.Height);\r
 208                         }\r
 209 \r
 210                         // Make "Focus" rectangle\r
 211                         rc.Inflate(-3,-3);\r
 212                         Rectangle       focusRC = rc;\r
 213 \r
 214                         if(Image != null) {\r
 215                                 int X = rc.X;\r
 216                                 int Y = rc.Y;\r
 217 \r
 218                                 if( ImageAlign == ContentAlignment.TopCenter ||\r
 219                                         ImageAlign == ContentAlignment.MiddleCenter ||\r
 220                                         ImageAlign == ContentAlignment.BottomCenter) {\r
 221                                         X += (rc.Width - Image.Width) / 2;\r
 222                                 }\r
 223                                 else if(ImageAlign == ContentAlignment.TopRight ||\r
 224                                         ImageAlign == ContentAlignment.MiddleRight||\r
 225                                         ImageAlign == ContentAlignment.BottomRight) {\r
 226                                         X += (rc.Width - Image.Width);\r
 227                                 }\r
 228 \r
 229                                 if( ImageAlign == ContentAlignment.BottomCenter ||\r
 230                                         ImageAlign == ContentAlignment.BottomLeft ||\r
 231                                         ImageAlign == ContentAlignment.BottomRight) {\r
 232                                         Y += rc.Height - Image.Height;\r
 233                                 }\r
 234                                 else if(ImageAlign == ContentAlignment.MiddleCenter ||\r
 235                                                 ImageAlign == ContentAlignment.MiddleLeft ||\r
 236                                                 ImageAlign == ContentAlignment.MiddleRight) {\r
 237                                         Y += (rc.Height - Image.Height) / 2;\r
 238                                 }\r
 239                                 paintOn.DrawImage(Image, X, Y, Image.Width, Image.Height);\r
 240                         }\r
 241 \r
 242                         if( (e.State & DrawItemState.Selected) != 0) {\r
 243                                 // FlatStyle.Flat uses color and not text offset to show state\r
 244                                 // FIXME: use SysMetrics to determine offset values ?\r
 245                                 if( FlatStyle != FlatStyle.Flat) {\r
 246                                         rc.Offset(1,1);\r
 247                                 }\r
 248                         }\r
 249 \r
 250                         StringFormat format = new StringFormat();\r
 251                         format.Alignment = horizontalAlign_;\r
 252                         format.LineAlignment = verticalAlign_;\r
 253                         paintOn.DrawString(Text, Font, SystemBrushes.ControlText, rc, format);\r
 254 \r
 255                         if( (e.State & DrawItemState.Focus) != 0) {\r
 256                                 // FIXME: Draw focus rectangle in different colors\r
 257                                 ControlPaint.DrawFocusRectangle( paintOn, focusRC);\r
 258                         }\r
 259                 }\r
 260 \r
 261                 protected override void WndProc (ref Message m) {\r
 262                         switch (m.Msg) {\r
 263                                 case Msg.WM_DRAWITEM: {\r
 264                                         DRAWITEMSTRUCT dis = new DRAWITEMSTRUCT();\r
 265                                         dis = (DRAWITEMSTRUCT)Marshal.PtrToStructure(m.LParam, dis.GetType());\r
 266                                         Rectangle       rect = new Rectangle(dis.rcItem.left, dis.rcItem.top, dis.rcItem.right - dis.rcItem.left, dis.rcItem.bottom - dis.rcItem.top);\r
 267                                         DrawItemEventArgs args = new DrawItemEventArgs(Graphics.FromHdc(dis.hDC), Font,\r
 268                                                 rect, dis.itemID, (DrawItemState)dis.itemState);\r
 269                                         OnDrawItem( args);\r
 270                                         //Marshal.StructureToPtr(dis, m.LParam, false);\r
 271                                         m.Result = (IntPtr)1;\r
 272                                 }\r
 273                                         break;\r
 274                                 default:\r
 275                                         base.WndProc (ref m);\r
 276                                         break;\r
 277                         }\r
 278                 }\r
 279                 \r
 280                 /// --- Button events ---\r
 281                 /// commented out, cause it only supports the .NET Framework infrastructure\r
 282                 /*\r
 283                 [MonoTODO]\r
 284                 public new event EventHandler DoubleClick {\r
 285                         add {\r
 286                                 throw new NotImplementedException ();\r
 287                         }\r
 288                         remove {\r
 289                                 throw new NotImplementedException ();\r
 290                         }\r
 291                 }\r
 292                 */\r
 293         }\r
 294 }\r