X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=net.mograsim.logic.ui%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fui%2FColorHelper.java;fp=net.mograsim.logic.ui%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fui%2FColorHelper.java;h=b631507294103cfa5318fce24a870c2629876458;hb=07faf07e3acb8b2afdc2bf65a46bc868faaed0f8;hp=0000000000000000000000000000000000000000;hpb=0009789a8df6b8d4562b6e1cbfa75102a7516ea8;p=Mograsim.git

diff --git a/net.mograsim.logic.ui/src/net/mograsim/logic/ui/ColorHelper.java b/net.mograsim.logic.ui/src/net/mograsim/logic/ui/ColorHelper.java
new file mode 100644
index 00000000..b6315072
--- /dev/null
+++ b/net.mograsim.logic.ui/src/net/mograsim/logic/ui/ColorHelper.java
@@ -0,0 +1,91 @@
+package net.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 net.haspamelodica.swt.helper.gcs.GeneralGC;
+import net.mograsim.logic.core.types.ColorDefinition;
+import net.mograsim.logic.core.types.ColorDefinition.BuiltInColor;
+
+//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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