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

   1 //
   2 // System.Windows.Forms.RadioButton.cs
   3 //
   4 // Author:
   5 //   stubbed out by Daniel Carrera (dcarrera@math.toronto.edu)
   6 //      Dennis Hayes (dennish@raytek.com)
   7 //   implemented by Aleksey Ryabchuk (ryabchuk@yahoo.com)
   8 // (C) 2002/3 Ximian, Inc
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31 using System.Drawing;
  32 using System.Drawing.Text;
  33 using System.ComponentModel;
  34
  35 namespace System.Windows.Forms {
  36
  37         // <summary>
  38         // Represents a Windows radio button
  39         // </summary>
  40
  41     public class RadioButton : ButtonBase {
  42
  43                 Appearance              appearance;
  44                 bool                    autoCheck;
  45                 ContentAlignment        checkAlign;
  46                 ContentAlignment        _textAlign;
  47                 bool                    _checked;
  48
  49                 public RadioButton()
  50                 {
  51                         SubClassWndProc_ = true;
  52                         SetStyle (ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true);
  53                         //callWinControlProcMask &= ~(CallWinControlProcMask.MOUSE_MESSAGES | CallWinControlProcMask.KEYBOARD_MESSAGES);
  54
  55                         appearance = Appearance.Normal;
  56                         checkAlign = ContentAlignment.MiddleLeft;
  57                         TextAlign  = ContentAlignment.MiddleLeft;
  58                         autoCheck = true;
  59                         _checked = false;
  60                 }
  61
  62                 public Appearance Appearance {
  63                         get {   return appearance; }
  64                         set {
  65                                 if ( !Enum.IsDefined ( typeof(Appearance), value ) )
  66                                         throw new InvalidEnumArgumentException( "Appearance",
  67                                                 (int)value,
  68                                                 typeof(Appearance));
  69
  70                                 if ( appearance != value ) {
  71                                         int oldStyle = AppearanceStyle;
  72                                         appearance = value;
  73
  74                                         if ( IsHandleCreated )
  75                                                 Win32.UpdateWindowStyle ( Handle, oldStyle, AppearanceStyle );
  76
  77                                         if ( AppearanceChanged != null )
  78                                                 AppearanceChanged ( this, EventArgs.Empty );
  79                                 }
  80                         }
  81                 }
  82
  83                 public bool AutoCheck {
  84                         get {   return autoCheck; }
  85                         set {
  86                                 if ( autoCheck != value ) {
  87                                         int oldStyle = AutoCheckStyle;
  88                                         autoCheck = value;
  89
  90                                         if ( IsHandleCreated )
  91                                                 Win32.UpdateWindowStyle ( Handle, oldStyle, AutoCheckStyle );
  92                                 }
  93                         }
  94                 }
  95
  96                 [MonoTODO]
  97                 public ContentAlignment CheckAlign {
  98                         get {   return checkAlign; }
  99                         set {
 100                                 if ( !Enum.IsDefined ( typeof(ContentAlignment), value ) )
 101                                         throw new InvalidEnumArgumentException( "CheckAlign",
 102                                                 (int)value,
 103                                                 typeof(Appearance));
 104
 105                                 if ( checkAlign != value ) {
 106                                         checkAlign = value;
 107                                 }
 108                         }
 109                 }
 110
 111                 public bool Checked {
 112                         get {   return _checked; }
 113                         set {
 114                                 if ( _checked != value ) {
 115                                         _checked = value;
 116                                         OnCheckedChanged ( EventArgs.Empty );
 117                                         Invalidate ();
 118                                 }
 119                         }
 120                 }
 121
 122                 [MonoTODO]
 123                 public override ContentAlignment TextAlign {
 124                         get {   return _textAlign;      }
 125                         set {   _textAlign = value;     }
 126                 }
 127
 128                 public void PerformClick()
 129                 {
 130                         OnClick ( EventArgs.Empty );
 131                 }
 132
 133                 public override string ToString()
 134                 {
 135                         return GetType().FullName.ToString () + ", Checked: " + Checked.ToString ( );
 136                 }
 137
 138                 public event EventHandler AppearanceChanged;
 139                 public event EventHandler CheckedChanged;
 140
 141                 [MonoTODO]
 142                 protected override CreateParams CreateParams {
 143                         get {
 144                                 CreateParams createParams = base.CreateParams;
 145
 146                                 createParams.ClassName = "BUTTON";
 147
 148                                 createParams.Style = (int) (
 149                                         (int)WindowStyles.WS_CHILD |
 150                                         (int)WindowStyles.WS_VISIBLE |
 151                                         (int)WindowStyles.WS_CLIPSIBLINGS);
 152
 153                                 createParams.Style |= AutoCheckStyle | AppearanceStyle;
 154                                 createParams.Style |= (int)Win32.ContentAlignment2SystemButtonStyle( _textAlign );
 155                                 createParams.Style |= (int)ButtonStyles.BS_OWNERDRAW;
 156
 157                                 return createParams;
 158                         }
 159                 }
 160
 161                 protected override ImeMode DefaultImeMode {
 162                         get {   return ImeMode.Disable; }
 163                 }
 164
 165                 protected override Size DefaultSize {
 166                         get {   return new Size(104,24); }
 167                 }
 168
 169                 [MonoTODO]
 170                 protected override AccessibleObject CreateAccessibilityInstance()
 171                 {
 172                         throw new NotImplementedException ();
 173                 }
 174
 175                 protected virtual void OnCheckedChanged(EventArgs e)
 176                 {
 177                         if ( CheckedChanged != null )
 178                                 CheckedChanged ( this, e );
 179                 }
 180
 181                 [MonoTODO]
 182                 protected override void OnClick(EventArgs e)
 183                 {
 184                         if (AutoCheck && !Checked) {
 185                                 Checked = true;
 186                                 foreach (Control ctr in Parent.Controls) {
 187                                         RadioButton rbtn = ctr as RadioButton;
 188                                         if (rbtn != null && rbtn != this) {
 189                                                 rbtn.Checked = false;
 190                                         }
 191                                 }
 192                         }
 193                         base.OnClick ( e );
 194                 }
 195
 196                 [MonoTODO]
 197                 protected override void OnEnter(EventArgs e)
 198                 {
 199 //FIXME                 throw new NotImplementedException ();
 200                 }
 201
 202                 [MonoTODO]
 203                 protected override void OnHandleCreated(EventArgs e)
 204                 {
 205                         base.OnHandleCreated ( e );
 206                 }
 207
 208                 protected override void OnMouseUp(MouseEventArgs e)
 209                 {
 210                         OnClick (EventArgs.Empty);
 211                         base.OnMouseUp(e);
 212                 }
 213
 214                 [MonoTODO]
 215                 protected override bool ProcessMnemonic(char charCode)
 216                 {
 217                         throw new NotImplementedException ();
 218                 }
 219
 220                 private int AutoCheckStyle
 221                 {
 222                         get { return (int) ( AutoCheck ?  ButtonStyles.BS_AUTORADIOBUTTON : ButtonStyles.BS_RADIOBUTTON ); }
 223                 }
 224
 225                 private int AppearanceStyle
 226                 {
 227                         get { return (int) ( Appearance == Appearance.Normal ? 0 : ButtonStyles.BS_PUSHLIKE ); }
 228                 }
 229
 230                 internal override void ButtonPaint (PaintEventArgs pevent)
 231                 {
 232                         Rectangle       paintBounds     = ClientRectangle;
 233                         Bitmap          bmp             = new Bitmap( paintBounds.Width, paintBounds.Height, pevent.Graphics);
 234                         Graphics        paintOn         = Graphics.FromImage(bmp);
 235                         int             CheckSize       = 12;           // Might not be correct
 236                         Rectangle       checkRect;
 237                         Rectangle       textRect;
 238                         ButtonState     buttonState     = ButtonState.Normal;
 239
 240                         // Clear the radiobutton background
 241                         SolidBrush sb = new SolidBrush (BackColor);
 242                         paintOn.FillRectangle (sb, pevent.ClipRectangle);
 243                         sb.Dispose ();
 244
 245                         // Location of button and text
 246                         checkRect = new Rectangle (paintBounds.Left, paintBounds.Top, CheckSize, CheckSize);
 247                         textRect = new Rectangle (checkRect.Right + 3, paintBounds.Top, paintBounds.Width - checkRect.Width - 4, paintBounds.Height);
 248
 249                         if (0 != (CheckAlign & (ContentAlignment.BottomLeft | ContentAlignment.BottomCenter | ContentAlignment.BottomRight))) {
 250                                 checkRect.Y = paintBounds.Bottom - CheckSize;
 251                         }
 252                         else if(0 != (CheckAlign & (ContentAlignment.MiddleLeft | ContentAlignment.MiddleCenter | ContentAlignment.MiddleRight))) {
 253                                 checkRect.Y = paintBounds.Top + paintBounds.Height / 2 - CheckSize / 2;
 254                         }
 255
 256                         if (0 != (CheckAlign & (ContentAlignment.TopRight | ContentAlignment.MiddleRight | ContentAlignment.BottomRight))) {
 257                                 checkRect.X = paintBounds.Right - CheckSize;
 258                                 textRect.X = paintBounds.Left;
 259                         }
 260                         else if(0 != (CheckAlign & (ContentAlignment.TopCenter | ContentAlignment.MiddleCenter | ContentAlignment.BottomCenter))) {
 261                                 checkRect.X = paintBounds.Left + paintBounds.Width / 2 - CheckSize / 2;
 262                                 textRect.X = paintBounds.Left;
 263                                 textRect.Width = paintBounds.Width;
 264                         }
 265
 266                         if (FlatStyle == FlatStyle.Flat) {
 267                                 buttonState |= ButtonState.Flat;
 268                         }
 269
 270                         if (Checked) {
 271                                 buttonState |= ButtonState.Checked;
 272                         }
 273
 274                         ControlPaint.DrawRadioButton (paintOn, checkRect, buttonState);
 275
 276                         sb=new SolidBrush(ForeColor);
 277                         paintOn.DrawString(Text, Font, sb, textRect, Win32.ContentAlignment2StringFormat(_textAlign, HotkeyPrefix.Show));
 278                         sb.Dispose();
 279
 280                         if (Focused) {
 281                                 ControlPaint.DrawFocusRectangle (paintOn, textRect);
 282                         }
 283
 284                         pevent.Graphics.DrawImage(bmp, 0, 0, paintBounds.Width, paintBounds.Height);
 285                         paintOn.Dispose ();
 286                         bmp.Dispose();
 287                 }
 288          }
 289 }