+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.utils.ui.color;\r
+\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.events.PaintEvent;\r
+import org.eclipse.swt.events.PaintListener;\r
+import org.eclipse.swt.graphics.GC;\r
+import org.eclipse.swt.graphics.Image;\r
+import org.eclipse.swt.graphics.Rectangle;\r
+import org.eclipse.swt.widgets.Canvas;\r
+import org.eclipse.swt.widgets.Composite;\r
+import org.eclipse.swt.widgets.Display;\r
+\r
+/**\r
+ * \r
+ * Canvas that shows color gradients\r
+ * \r
+ * @author Marko Luukkainen\r
+ *\r
+ */\r
+public class ColorCanvas extends Canvas{\r
+ Color color;\r
+ int style;\r
+ \r
+ public ColorCanvas(Composite parent, int style) {\r
+ // FIXME : use xor operation to get SWT.HORIZONTAL and SWT.VERTICAL\r
+ // out of style when it's passed to parent\r
+ super(parent,SWT.BORDER);\r
+ this.style = style & (SWT.VERTICAL | SWT.HORIZONTAL) ;\r
+ addPaintListener(new PaintListener() {\r
+ public void paintControl(PaintEvent e) {\r
+ GC gc = e.gc;\r
+ Rectangle clip = gc.getClipping();\r
+ if (color != null) {\r
+ Image image = ColorIconCreator.createImage(color, clip.width,clip.height);\r
+ gc.drawImage(image, 0, 0);\r
+ image.dispose(); \r
+ } else {\r
+ gc.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));\r
+ gc.fillRectangle(clip);\r
+ }\r
+ }\r
+ });\r
+ }\r
+ \r
+ public void setColor(Color color) {\r
+ this.color = color;\r
+ this.redraw();\r
+ } \r
+\r
+}\r