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

   1 //
   2 // System.Windows.Forms.ColorDialog.cs
   3 //
   4 // Author:
   5 //   stubbed out by Jaak Simm (jaaksimm@firm.ee)
   6 //   Dennis Hayes (dennish@Raytek.com)
   7 //   Aleksey Ryabchuk (ryabchuk@yahoo.com)
   8 //
   9 // (C) Ximian, Inc., 2002
  10 //
  11
  12 using System.Drawing;
  13 using System.Runtime.InteropServices;
  14
  15 namespace System.Windows.Forms {
  16
  17         /// <summary>
  18         /// Represents a common dialog box that displays available colors along with controls that allow the user to define custom colors.
  19         /// </summary>
  20
  21         public class ColorDialog : CommonDialog {
  22
  23                 private bool allowFullOpen;
  24                 private bool anyColor;
  25                 private Color color;
  26                 private int[] customColors;
  27                 private bool fullOpen;
  28                 private bool showHelp;
  29                 private bool solidColorOnly;
  30
  31                 public ColorDialog() : base()
  32                 {
  33                         Reset ( );
  34                 }
  35
  36                 // these are show to be in the ms implmentation by winchurn
  37                 // but are not valid since they are not abstract or have any accessors.
  38                 //protected virtual IntPtr Instance {           }
  39                 //protected virtual int Options {               }
  40
  41                 public virtual bool AllowFullOpen {
  42                         get {
  43                                 return allowFullOpen;
  44                         }
  45                         set {
  46                                 allowFullOpen = value;
  47                         }
  48                 }
  49
  50                 public virtual bool AnyColor {
  51                         get {
  52                                 return anyColor;
  53                         }
  54                         set {
  55                                 anyColor = value;
  56                         }
  57                 }
  58
  59                 public Color Color {
  60                         get {
  61                                 return color;
  62                         }
  63                         set {
  64                                 color = value;
  65                         }
  66                 }
  67
  68                 public int[] CustomColors {
  69                         get {
  70                                 return customColors;
  71                         }
  72                         set {
  73                                 if ( value != null ) {
  74                                         for ( int i = 0; i < Math.Min ( customColors.Length, value.Length ); i++ )
  75                                                 customColors [ i ] = value [ i ];
  76                                 }
  77                         }
  78                 }
  79
  80                 public virtual bool FullOpen {
  81                         get {
  82                                 return fullOpen;
  83                         }
  84                         set {
  85                                 fullOpen = value;
  86                         }
  87                 }
  88
  89                 public virtual bool ShowHelp {
  90                         get {
  91                                 return showHelp;
  92                         }
  93                         set {
  94                                 showHelp = value;
  95                         }
  96                 }
  97
  98                 public virtual bool SolidColorOnly {
  99                         get {
 100                                 return solidColorOnly;
 101                         }
 102                         set {
 103                                 solidColorOnly = value;
 104                         }
 105                 }
 106
 107                 public override void Reset()
 108                 {
 109                         allowFullOpen = true;
 110                         anyColor = false;
 111                         color = Color.Black;
 112
 113                         customColors = new int [ 16 ];
 114                         for ( int i = 0; i < customColors.Length; i++ )
 115                                 customColors [ i ] = Win32.RGB ( Color.White );
 116
 117                         fullOpen = false;
 118                         showHelp = false;
 119                         solidColorOnly = false;
 120                 }
 121
 122                 protected override bool RunDialog( IntPtr hwndOwner )
 123                 {
 124                         CHOOSECOLOR cc = new CHOOSECOLOR (  );
 125                         cc.hwndOwner = hwndOwner;
 126                         cc.lStructSize  = ( uint ) Marshal.SizeOf( cc );
 127                         cc.Flags = (int) ( ChooseColorFlags.CC_RGBINIT | ChooseColorFlags.CC_ENABLEHOOK );
 128
 129                         cc.lpfnHook = new Win32.FnHookProc ( this.HookProc );
 130
 131                         if ( AllowFullOpen ) {
 132                                 if ( FullOpen )
 133                                         cc.Flags |= (int) ChooseColorFlags.CC_FULLOPEN;
 134                         }
 135                         else cc.Flags |= (int) ChooseColorFlags.CC_PREVENTFULLOPEN;
 136
 137                         if ( AnyColor )
 138                                 cc.Flags |= (int) ChooseColorFlags.CC_ANYCOLOR;
 139
 140                         if ( ShowHelp )
 141                                 cc.Flags |= (int) ChooseColorFlags.CC_SHOWHELP;
 142
 143                         if ( SolidColorOnly )
 144                                 cc.Flags |= (int) ChooseColorFlags.CC_SOLIDCOLOR;
 145
 146                         cc.rgbResult = Win32.RGB ( Color );
 147
 148                         cc.lpCustColors = Marshal.AllocHGlobal ( Marshal.SizeOf( customColors[0] ) * customColors.Length );
 149                         Marshal.Copy ( customColors, 0, cc.lpCustColors, customColors.Length );
 150
 151                         bool res = false;
 152                         try {
 153                                 res = Win32_WineLess.ChooseColor ( ref cc );
 154
 155                                 if ( res ) {
 156                                         this.Color = Color.FromArgb ( cc.rgbResult );
 157                                         Marshal.Copy ( cc.lpCustColors, customColors, 0, customColors.Length );
 158                                 }
 159                         }
 160                         finally {
 161                                 Marshal.FreeHGlobal ( cc.lpCustColors );
 162                         }
 163
 164                         return res;
 165                 }
 166
 167                 public override string ToString()
 168                 {
 169                         return GetType( ).FullName.ToString ( ) + ", Color: " + Color.ToString ( );
 170                 }
 171         }
 172 }