Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.graph.impl / src / org / simantics / browsing / ui / graph / impl / MissingImageDescriptor.java

diff --git a/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/MissingImageDescriptor.java b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/MissingImageDescriptor.java
new file mode 100644 (file)
index 0000000..5886b9b
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/MissingImageDescriptor.java
@@ -0,0 +1,59 @@
+/*******************************************************************************\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.browsing.ui.graph.impl;\r
+\r
+import org.eclipse.jface.resource.ImageDescriptor;\r
+import org.eclipse.swt.graphics.ImageData;\r
+import org.eclipse.swt.graphics.PaletteData;\r
+import org.eclipse.swt.graphics.RGB;\r
+\r
+/**\r
+ * A simple 16x16 white image descriptor for a missing image.\r
+ * <p>\r
+ * Use <code>MissingImageDescriptor.getInstance</code> to\r
+ * access the singleton instance maintained in an\r
+ * internal state variable.\r
+ * </p>\r
+ */\r
+public class MissingImageDescriptor extends ImageDescriptor {\r
+    private static MissingImageDescriptor instance;\r
+\r
+    protected static final ImageData IMAGE_DATA = new ImageData(16, 16,\r
+            1, new PaletteData(new RGB[] { new RGB(255, 255, 255) }));\r
+\r
+    /**\r
+     * Constructs a new default image descriptor.\r
+     */\r
+    private MissingImageDescriptor() {\r
+        super();\r
+    }\r
+\r
+    /* (non-Javadoc)\r
+     * Method declared on ImageDesciptor.\r
+     */\r
+    @Override\r
+    public ImageData getImageData() {\r
+        return IMAGE_DATA;\r
+    }\r
+\r
+    /**\r
+     * Returns the shared default image descriptor instance.\r
+     *\r
+     * @return the image descriptor for a default image\r
+     */\r
+    public static MissingImageDescriptor getInstance() {\r
+        if (instance == null) {\r
+            instance = new MissingImageDescriptor();\r
+        }\r
+        return instance;\r
+    }\r
+}\r