X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.graph.impl%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fgraph%2Fimpl%2FMissingImageDescriptor.java;fp=bundles%2Forg.simantics.browsing.ui.graph.impl%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fgraph%2Fimpl%2FMissingImageDescriptor.java;h=5886b9bcc74b4ece359c76592029dc843bbc1cc6;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

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
index 000000000..5886b9bcc
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+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/MissingImageDescriptor.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.browsing.ui.graph.impl;
+
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.graphics.RGB;
+
+/**
+ * A simple 16x16 white image descriptor for a missing image.
+ * <p>
+ * Use <code>MissingImageDescriptor.getInstance</code> to
+ * access the singleton instance maintained in an
+ * internal state variable.
+ * </p>
+ */
+public class MissingImageDescriptor extends ImageDescriptor {
+    private static MissingImageDescriptor instance;
+
+    protected static final ImageData IMAGE_DATA = new ImageData(16, 16,
+            1, new PaletteData(new RGB[] { new RGB(255, 255, 255) }));
+
+    /**
+     * Constructs a new default image descriptor.
+     */
+    private MissingImageDescriptor() {
+        super();
+    }
+
+    /* (non-Javadoc)
+     * Method declared on ImageDesciptor.
+     */
+    @Override
+    public ImageData getImageData() {
+        return IMAGE_DATA;
+    }
+
+    /**
+     * Returns the shared default image descriptor instance.
+     *
+     * @return the image descriptor for a default image
+     */
+    public static MissingImageDescriptor getInstance() {
+        if (instance == null) {
+            instance = new MissingImageDescriptor();
+        }
+        return instance;
+    }
+}