Renamed project to MoGraSim

[Mograsim.git] / LogicUI / src / mograsim / logic / ui / ColorHelper.java

diff --git a/LogicUI/src/mograsim/logic/ui/ColorHelper.java b/LogicUI/src/mograsim/logic/ui/ColorHelper.java
new file mode 100644 (file)
index 0000000..886c6f7
--- /dev/null
+++ b/LogicUI/src/mograsim/logic/ui/ColorHelper.java
@@ -0,0 +1,91 @@
+package mograsim.logic.ui;
+
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Device;
+
+import mograsim.logic.core.types.ColorDefinition;
+import mograsim.logic.core.types.ColorDefinition.BuiltInColor;
+import net.haspamelodica.swt.helper.gcs.GeneralGC;
+
+//TODO replace with a proper ColorManager
+public class ColorHelper
+{
+       public static void executeWithDifferentForeground(GeneralGC gc, ColorDefinition col, Runnable exec)
+       {
+               executeWithDifferentColor(gc.getDevice(), col, gc::getForeground, gc::setForeground, exec);
+       }
+
+       public static void executeWithDifferentBackground(GeneralGC gc, ColorDefinition col, Runnable exec)
+       {
+               executeWithDifferentColor(gc.getDevice(), col, gc::getBackground, gc::setBackground, exec);
+       }
+
+       private static void executeWithDifferentColor(Device device, ColorDefinition col, Supplier<Color> getColor, Consumer<Color> setColor,
+                       Runnable exec)
+       {
+               Color oldColor = getColor.get();
+               boolean isNoSystemColor = col.builtInColor == null;
+               Color newColor;
+               if (isNoSystemColor)
+                       newColor = new Color(device, col.r, col.g, col.b);
+               else
+                       newColor = device.getSystemColor(ColorHelper.toSWTColorConstant(col.builtInColor));
+               setColor.accept(newColor);
+
+               exec.run();
+
+               setColor.accept(oldColor);
+               if (isNoSystemColor)
+                       newColor.dispose();
+       }
+
+       public static int toSWTColorConstant(BuiltInColor col)
+       {
+               switch (col)
+               {
+               case COLOR_BLACK:
+                       return SWT.COLOR_BLACK;
+               case COLOR_BLUE:
+                       return SWT.COLOR_BLUE;
+               case COLOR_CYAN:
+                       return SWT.COLOR_CYAN;
+               case COLOR_DARK_BLUE:
+                       return SWT.COLOR_DARK_BLUE;
+               case COLOR_DARK_CYAN:
+                       return SWT.COLOR_DARK_CYAN;
+               case COLOR_DARK_GRAY:
+                       return SWT.COLOR_DARK_GRAY;
+               case COLOR_DARK_GREEN:
+                       return SWT.COLOR_DARK_GREEN;
+               case COLOR_DARK_MAGENTA:
+                       return SWT.COLOR_DARK_MAGENTA;
+               case COLOR_DARK_RED:
+                       return SWT.COLOR_DARK_RED;
+               case COLOR_DARK_YELLOW:
+                       return SWT.COLOR_DARK_YELLOW;
+               case COLOR_GRAY:
+                       return SWT.COLOR_GRAY;
+               case COLOR_GREEN:
+                       return SWT.COLOR_GREEN;
+               case COLOR_MAGENTA:
+                       return SWT.COLOR_MAGENTA;
+               case COLOR_RED:
+                       return SWT.COLOR_RED;
+               case COLOR_WHITE:
+                       return SWT.COLOR_WHITE;
+               case COLOR_YELLOW:
+                       return SWT.COLOR_YELLOW;
+               default:
+                       throw new IllegalArgumentException("Unknown enum constant: " + col);
+               }
+       }
+
+       private ColorHelper()
+       {
+               throw new UnsupportedOperationException("No instances of ColorHelper");
+       }
+}
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