net.mograsim.preferences/src/net/mograsim/preferences/SimpleColorManager.java

   1 package net.mograsim.preferences;
   2
   3 import java.util.HashMap;
   4 import java.util.Map;
   5
   6 import org.eclipse.swt.SWT;
   7 import org.eclipse.swt.graphics.Color;
   8 import org.eclipse.swt.graphics.Device;
   9
  10 import net.mograsim.preferences.ColorDefinition.BuiltInColor;
  11
  12 public class SimpleColorManager extends ColorManager
  13 {
  14         private static final Map<BuiltInColor, Color> systemColors = new HashMap<>();
  15         private static final Map<Color, BuiltInColor> systemColorConstants = new HashMap<>();
  16
  17         @Override
  18         public Color toColor(Device device, ColorDefinition col)
  19         {
  20                 Color systemColor = systemColors.get(col.builtInColor);
  21                 if (systemColor != null)
  22                         return systemColor;
  23                 if (col.builtInColor != null)
  24                 {
  25                         systemColor = device.getSystemColor(toSWTColorConstant(col.builtInColor));
  26                         systemColors.put(col.builtInColor, systemColor);
  27                         systemColorConstants.put(systemColor, col.builtInColor);
  28                         return systemColor;
  29                 }
  30                 return new Color(device, col.r, col.g, col.b);
  31         }
  32
  33         @Override
  34         public void dispose(Color col)
  35         {
  36                 if (!systemColorConstants.containsKey(col))
  37                         col.dispose();
  38         }
  39
  40         public static int toSWTColorConstant(BuiltInColor col)
  41         {
  42                 switch (col)
  43                 {
  44                 case COLOR_BLACK:
  45                         return SWT.COLOR_BLACK;
  46                 case COLOR_BLUE:
  47                         return SWT.COLOR_BLUE;
  48                 case COLOR_CYAN:
  49                         return SWT.COLOR_CYAN;
  50                 case COLOR_DARK_BLUE:
  51                         return SWT.COLOR_DARK_BLUE;
  52                 case COLOR_DARK_CYAN:
  53                         return SWT.COLOR_DARK_CYAN;
  54                 case COLOR_DARK_GRAY:
  55                         return SWT.COLOR_DARK_GRAY;
  56                 case COLOR_DARK_GREEN:
  57                         return SWT.COLOR_DARK_GREEN;
  58                 case COLOR_DARK_MAGENTA:
  59                         return SWT.COLOR_DARK_MAGENTA;
  60                 case COLOR_DARK_RED:
  61                         return SWT.COLOR_DARK_RED;
  62                 case COLOR_DARK_YELLOW:
  63                         return SWT.COLOR_DARK_YELLOW;
  64                 case COLOR_GRAY:
  65                         return SWT.COLOR_GRAY;
  66                 case COLOR_GREEN:
  67                         return SWT.COLOR_GREEN;
  68                 case COLOR_MAGENTA:
  69                         return SWT.COLOR_MAGENTA;
  70                 case COLOR_RED:
  71                         return SWT.COLOR_RED;
  72                 case COLOR_WHITE:
  73                         return SWT.COLOR_WHITE;
  74                 case COLOR_YELLOW:
  75                         return SWT.COLOR_YELLOW;
  76                 default:
  77                         throw new IllegalArgumentException("Unknown enum constant: " + col);
  78                 }
  79         }
  80 }