tmf/org.eclipse.tracecompass.tmf.ui/src/org/eclipse/tracecompass/internal/provisional/tmf/ui/views/timegraph2/swt/SwtColorFactory.java

   1 /*******************************************************************************
   2  * Copyright (c) 2016 EfficiOS Inc., Alexandre Montplaisir
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *******************************************************************************/
   9
  10 package org.eclipse.tracecompass.internal.provisional.tmf.ui.views.timegraph2.swt;
  11
  12 import java.util.HashMap;
  13 import java.util.Map;
  14
  15 import org.eclipse.swt.graphics.Color;
  16 import org.eclipse.swt.widgets.Display;
  17 import org.eclipse.tracecompass.internal.provisional.tmf.core.views.timegraph2.ColorDefinition;
  18
  19 final class SwtColorFactory {
  20
  21     private SwtColorFactory() {}
  22
  23     private static final Map<ColorDefinition, Color> COLOR_MAP = new HashMap<>();
  24
  25     /**
  26      * Instantiate a {@link Color} from a {@link ColorDefinition} object.
  27      *
  28      * Must be called by the UI thread only, so it should not need any special
  29      * synchronization.
  30      *
  31      * @param colorDef
  32      *            The ColorDefinition
  33      * @return The Color object
  34      */
  35     public static Color getColorFromDef(ColorDefinition colorDef) {
  36         Color color = COLOR_MAP.get(colorDef);
  37         if (color == null) {
  38             color = new Color(Display.getDefault(), colorDef.fRed, colorDef.fGreen, colorDef.fBlue, colorDef.fAlpha);
  39             COLOR_MAP.put(colorDef, color);
  40         }
  41         return color;
  42     }
  43
  44 }