added number editing support in addition to integer editing support

org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/utils/TableViewerUtils.java

@@ -34,7 +34,7 @@ import org.eclipse.swt.widgets.Composite;
  * @author hoelzl
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating GREEN Hash: 877B1F139CCBFED05771E43F31FA489F
+ * @ConQAT.Rating YELLOW Hash: A52D1443E8DA2144144AC2D83472C803
  */
 public class TableViewerUtils {
 
@@ -128,4 +128,60 @@ public class TableViewerUtils {
 			return true;
 		}
 	}
+
+	/** Editing support for numbers. */
+	public static abstract class NumberEditingSupport extends EditingSupport {
+
+		/** The parent where the editing support is needed. */
+		private Composite parent;
+
+		/** Constructor. */
+		public NumberEditingSupport(ColumnViewer viewer, Composite parent) {
+			super(viewer);
+			this.parent = parent;
+		}
+
+		/** {@inheritDoc} */
+		@Override
+		protected CellEditor getCellEditor(Object element) {
+			CellEditor ce = new TextCellEditor(parent);
+			ce.setValidator(new ICellEditorValidator() {
+
+				/** {@inheritDoc} */
+				@Override
+				public String isValid(Object value) {
+					if (getNumberFromString(value.toString()) == null) {
+						return "Not a valid number";
+					}
+					return null;
+				}
+			});
+			return ce;
+		}
+
+		/** {@inheritDoc} */
+		@Override
+		protected boolean canEdit(Object element) {
+			return true;
+		}
+
+		/**
+		 * Parses a number from a string and returns it or null if parse error
+		 * occurred.
+		 */
+		protected Number getNumberFromString(String numAsString) {
+			try {
+				Number num = Integer.parseInt(numAsString);
+				return num;
+			} catch (NumberFormatException nfe) {
+				try {
+					Number num = Double.parseDouble(numAsString);
+					return num;
+				} catch (NumberFormatException e) {
+					e.printStackTrace();
+				}
+			}
+			return null;
+		}
+	}
 }