net.mograsim.logic.ui/src/net/mograsim/logic/ui/ColorHelper.java

   1 package net.mograsim.logic.ui;
   2
   3 import java.util.function.Consumer;
   4 import java.util.function.Supplier;
   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.haspamelodica.swt.helper.gcs.GeneralGC;
  11 import net.mograsim.logic.core.types.ColorDefinition;
  12 import net.mograsim.logic.core.types.ColorDefinition.BuiltInColor;
  13
  14 //TODO replace with a proper ColorManager
  15 public class ColorHelper
  16 {
  17         public static void executeWithDifferentForeground(GeneralGC gc, ColorDefinition col, Runnable exec)
  18         {
  19                 executeWithDifferentColor(gc.getDevice(), col, gc::getForeground, gc::setForeground, exec);
  20         }
  21
  22         public static void executeWithDifferentBackground(GeneralGC gc, ColorDefinition col, Runnable exec)
  23         {
  24                 executeWithDifferentColor(gc.getDevice(), col, gc::getBackground, gc::setBackground, exec);
  25         }
  26
  27         private static void executeWithDifferentColor(Device device, ColorDefinition col, Supplier<Color> getColor, Consumer<Color> setColor,
  28                         Runnable exec)
  29         {
  30                 Color oldColor = getColor.get();
  31                 boolean isNoSystemColor = col.builtInColor == null;
  32                 Color newColor;
  33                 if (isNoSystemColor)
  34                         newColor = new Color(device, col.r, col.g, col.b);
  35                 else
  36                         newColor = device.getSystemColor(ColorHelper.toSWTColorConstant(col.builtInColor));
  37                 setColor.accept(newColor);
  38
  39                 exec.run();
  40
  41                 setColor.accept(oldColor);
  42                 if (isNoSystemColor)
  43                         newColor.dispose();
  44         }
  45
  46         public static int toSWTColorConstant(BuiltInColor col)
  47         {
  48                 switch (col)
  49                 {
  50                 case COLOR_BLACK:
  51                         return SWT.COLOR_BLACK;
  52                 case COLOR_BLUE:
  53                         return SWT.COLOR_BLUE;
  54                 case COLOR_CYAN:
  55                         return SWT.COLOR_CYAN;
  56                 case COLOR_DARK_BLUE:
  57                         return SWT.COLOR_DARK_BLUE;
  58                 case COLOR_DARK_CYAN:
  59                         return SWT.COLOR_DARK_CYAN;
  60                 case COLOR_DARK_GRAY:
  61                         return SWT.COLOR_DARK_GRAY;
  62                 case COLOR_DARK_GREEN:
  63                         return SWT.COLOR_DARK_GREEN;
  64                 case COLOR_DARK_MAGENTA:
  65                         return SWT.COLOR_DARK_MAGENTA;
  66                 case COLOR_DARK_RED:
  67                         return SWT.COLOR_DARK_RED;
  68                 case COLOR_DARK_YELLOW:
  69                         return SWT.COLOR_DARK_YELLOW;
  70                 case COLOR_GRAY:
  71                         return SWT.COLOR_GRAY;
  72                 case COLOR_GREEN:
  73                         return SWT.COLOR_GREEN;
  74                 case COLOR_MAGENTA:
  75                         return SWT.COLOR_MAGENTA;
  76                 case COLOR_RED:
  77                         return SWT.COLOR_RED;
  78                 case COLOR_WHITE:
  79                         return SWT.COLOR_WHITE;
  80                 case COLOR_YELLOW:
  81                         return SWT.COLOR_YELLOW;
  82                 default:
  83                         throw new IllegalArgumentException("Unknown enum constant: " + col);
  84                 }
  85         }
  86
  87         private ColorHelper()
  88         {
  89                 throw new UnsupportedOperationException("No instances of ColorHelper");
  90         }
  91 }