X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.eclipse.ui%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2FGenericTableComparator.java;fp=org.argeo.eclipse.ui%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2FGenericTableComparator.java;h=a4179cbeecca805043c76f5094e421ec401ca5e2;hb=1df1bf64759d35d3d72b9d96b26b71118fdbe031;hp=0000000000000000000000000000000000000000;hpb=3a3d316af102ba410d1d9e6de349d0c8f7ac044f;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/GenericTableComparator.java b/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/GenericTableComparator.java
new file mode 100644
index 000000000..a4179cbee
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/GenericTableComparator.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.eclipse.ui;
+
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.jface.viewers.ViewerComparator;
+
+public abstract class GenericTableComparator extends ViewerComparator {
+	private static final long serialVersionUID = -1175894935075325810L;
+	protected int propertyIndex;
+	public static final int ASCENDING = 0, DESCENDING = 1;
+	protected int direction = DESCENDING;
+
+	/**
+	 * Creates an instance of a sorter for TableViewer.
+	 * 
+	 * @param defaultColumn
+	 *            the default sorter column
+	 */
+
+	public GenericTableComparator(int defaultColumnIndex, int direction) {
+		propertyIndex = defaultColumnIndex;
+		this.direction = direction;
+	}
+
+	public void setColumn(int column) {
+		if (column == this.propertyIndex) {
+			// Same column as last sort; toggle the direction
+			direction = 1 - direction;
+		} else {
+			// New column; do a descending sort
+			this.propertyIndex = column;
+			direction = DESCENDING;
+		}
+	}
+
+	/**
+	 * Must be Overriden in each view.
+	 */
+	public abstract int compare(Viewer viewer, Object e1, Object e2);
+}