Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.utils.ui / src / org / simantics / utils / ui / color / ColorCanvas.java

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/color/ColorCanvas.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/color/ColorCanvas.java
new file mode 100644 (file)
index 0000000..7e8aa12
--- /dev/null
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/color/ColorCanvas.java
@@ -0,0 +1,61 @@
+/*******************************************************************************\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