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

   1 //
   2 // System.Windows.Forms.PicureBox
   3 //
   4 // Author:
   5 //   stubbed out by Hossein Safavi (hsafavi@purdue.edu)
   6 //      Dennis Hayes (dennish@raytek.com)
   7 //   Aleksey Ryabchuk (ryabchuk@yahoo.com)
   8 //
   9 // (C) 2002 Ximian, Inc
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 using System.Drawing;
  33 using System.ComponentModel;
  34
  35 namespace System.Windows.Forms {
  36
  37         //<summary>
  38         //</summary>
  39         public class PictureBox : Control {
  40
  41                 Image image;
  42                 PictureBoxSizeMode sizeMode;
  43                 BorderStyle borderStyle;
  44
  45                 public PictureBox ()
  46                 {
  47                         image = null;
  48                         sizeMode = PictureBoxSizeMode.Normal;
  49                         borderStyle = BorderStyle.None;
  50                         SetStyle ( ControlStyles.UserPaint, true );
  51                         SetStyle ( ControlStyles.Selectable, false );
  52                 }
  53
  54                 public BorderStyle BorderStyle {
  55                         get {   return borderStyle; }
  56                         set {
  57                                 if ( !Enum.IsDefined ( typeof(BorderStyle), value ) )
  58                                         throw new InvalidEnumArgumentException( "BorderStyle",
  59                                                 (int)value,
  60                                                 typeof(BorderStyle));
  61
  62                                 if ( borderStyle != value ) {
  63                                         borderStyle = value;
  64                                         RecreateHandle ( );
  65                                 }
  66                         }
  67                 }
  68
  69
  70                 public Image Image {
  71                         get { return image; }
  72                         set {
  73                                 image = value;
  74
  75                                 if ( sizeMode == PictureBoxSizeMode.AutoSize && image != null )
  76                                         SetBounds ( 0, 0, 0, 0, BoundsSpecified.None );
  77
  78                                 Invalidate ( );
  79                         }
  80                 }
  81
  82                 [EditorBrowsable (EditorBrowsableState.Never)]
  83                 public new ImeMode ImeMode {
  84                         get { return base.ImeMode; }
  85                         set { base.ImeMode = value;}
  86                 }
  87
  88                 protected override CreateParams CreateParams {
  89                         get {
  90                                 RegisterDefaultWindowClass ( );
  91
  92                                 CreateParams createParams = base.CreateParams;
  93
  94                                 createParams.ClassName = Win32.DEFAULT_WINDOW_CLASS;
  95
  96                                 createParams.Style |= (int) (
  97                                         WindowStyles.WS_CHILD |
  98                                         WindowStyles.WS_VISIBLE |
  99                                         WindowStyles.WS_CLIPCHILDREN |
 100                                         WindowStyles.WS_CLIPSIBLINGS );
 101
 102                                 switch ( BorderStyle ) {
 103                                         case BorderStyle.Fixed3D:
 104                                                 createParams.ExStyle |= (int)WindowExStyles.WS_EX_CLIENTEDGE;
 105                                                 break;
 106                                         case BorderStyle.FixedSingle:
 107                                                 createParams.Style |= (int) WindowStyles.WS_BORDER;
 108                                                 break;
 109                                 };
 110                                 return createParams;
 111                         }
 112                 }
 113
 114                 protected override ImeMode DefaultImeMode {
 115                         get { return ImeMode.Disable; }
 116                 }
 117
 118                 protected override Size DefaultSize {
 119                         get { return new Size(100,50); }
 120                 }
 121
 122                 public override string ToString()
 123                 {
 124                         return GetType( ).FullName.ToString ( ) + ", SizeMode: " + SizeMode.ToString ( );
 125                 }
 126
 127                 public PictureBoxSizeMode SizeMode {
 128                         get { return sizeMode; }
 129                         set {
 130                                 if ( !Enum.IsDefined ( typeof(PictureBoxSizeMode), value ) )
 131                                         throw new InvalidEnumArgumentException( "SizeMode",
 132                                                 (int)value,
 133                                                 typeof( PictureBoxSizeMode ) );
 134
 135                                 if ( sizeMode != value ) {
 136                                         sizeMode = value;
 137
 138                                         if ( sizeMode == PictureBoxSizeMode.AutoSize )
 139                                                 SetBounds ( 0, 0, 0, 0, BoundsSpecified.None );
 140
 141                                         SetStyle ( ControlStyles.AllPaintingInWmPaint, sizeMode == PictureBoxSizeMode.StretchImage );
 142
 143                                         Invalidate ( );
 144                                         OnSizeModeChanged ( EventArgs.Empty );
 145                                 }
 146                         }
 147                 }
 148
 149
 150                 [MonoTODO]
 151                 protected override void Dispose(bool disposing) {
 152                         base.Dispose(disposing);
 153                 }
 154
 155                 [MonoTODO]
 156                 protected override void OnEnabledChanged(EventArgs e)
 157                 {
 158                         //FIXME:
 159                         base.OnEnabledChanged(e);
 160                 }
 161
 162                 protected override void OnPaint(PaintEventArgs pe)
 163                 {
 164                         if ( Image != null ) {
 165                                 switch ( SizeMode ) {
 166                                 case PictureBoxSizeMode.StretchImage:
 167                                         pe.Graphics.DrawImage ( Image, ClientRectangle );
 168                                 break;
 169                                 case PictureBoxSizeMode.CenterImage:
 170                                         int dx = (ClientRectangle.Width - Image.Width)/2;
 171                                         int dy = (ClientRectangle.Height- Image.Height)/2;
 172                                         pe.Graphics.DrawImage ( Image, dx, dy );
 173                                 break;
 174                                 default:
 175                                         pe.Graphics.DrawImage ( Image, 0, 0 );
 176                                 break;
 177                                 }
 178                         }
 179                         base.OnPaint(pe);
 180                 }
 181
 182                 protected override void OnParentChanged(EventArgs e)
 183                 {
 184                         if ( Parent != null ) {
 185                                 BackColor = Parent.BackColor;
 186                                 Invalidate ( );
 187                         }
 188
 189                         base.OnParentChanged(e);
 190                 }
 191
 192                 protected override void OnResize(EventArgs e)
 193                 {
 194                         if ( SizeMode == PictureBoxSizeMode.CenterImage )
 195                                 Invalidate ( );
 196                         else if ( SizeMode == PictureBoxSizeMode.StretchImage && IsHandleCreated)
 197                                 Win32.InvalidateRect ( Handle, IntPtr.Zero, 0 );
 198
 199                         base.OnResize(e);
 200                 }
 201
 202                 protected virtual void OnSizeModeChanged(EventArgs e)
 203                 {
 204                         if ( SizeModeChanged != null )
 205                                 SizeModeChanged ( this, e );
 206                 }
 207
 208                 [MonoTODO]
 209                 protected override void OnVisibleChanged(EventArgs e)
 210                 {
 211                         base.OnVisibleChanged ( e );
 212                 }
 213
 214                 [MonoTODO]
 215                 //this should be inherited.
 216                 protected override void OnPaintBackground (PaintEventArgs e) {
 217                         if ( SizeMode != PictureBoxSizeMode.StretchImage )
 218                                 base.OnPaintBackground ( e );
 219                 }
 220
 221                 protected override void SetBoundsCore(int x,int y,int width,int height,BoundsSpecified specified)
 222                 {
 223                         if ( SizeMode == PictureBoxSizeMode.AutoSize && Image != null ) {
 224                                 width = Image.Width;
 225                                 height= Image.Height;
 226                                 specified = BoundsSpecified.Size;
 227                         }
 228
 229                         base.SetBoundsCore(x, y, width, height, specified);
 230                 }
 231
 232                 public event EventHandler SizeModeChanged;
 233         }
 234 }