[Rubyeclipse-commit] SF.net SVN: rubyeclipse: [2453] trunk/org.rubypeople.rdt.ui/src/org/ rubypeople/rdt/ui/TableViewerSorter.java

[<caw...@us...>]

Revision: 2453
          http://svn.sourceforge.net/rubyeclipse/?rev=2453&view=rev
Author:   cawilliams
Date:     2007-05-09 08:30:23 -0700 (Wed, 09 May 2007)

Log Message:
-----------
add useful class from RadRails

Added Paths:
-----------
    trunk/org.rubypeople.rdt.ui/src/org/rubypeople/rdt/ui/TableViewerSorter.java

Added: trunk/org.rubypeople.rdt.ui/src/org/rubypeople/rdt/ui/TableViewerSorter.java
===================================================================
--- trunk/org.rubypeople.rdt.ui/src/org/rubypeople/rdt/ui/TableViewerSorter.java	                        (rev 0)
+++ trunk/org.rubypeople.rdt.ui/src/org/rubypeople/rdt/ui/TableViewerSorter.java	2007-05-09 15:30:23 UTC (rev 2453)
@@ -0,0 +1,101 @@
+package org.rubypeople.rdt.ui;
+
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.jface.viewers.ViewerSorter;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.widgets.Table;
+import org.eclipse.swt.widgets.TableColumn;
+
+/**
+ * A generic TableViewer Sorter. 
+ * 
+ * Mostly taken from https://bugs.eclipse.org/bugs/show_bug.cgi?id=158112
+ * 
+ * @author brad
+ */
+public class TableViewerSorter extends ViewerSorter {
+	private int columnIndex = 0;
+
+	public TableViewerSorter(int columnIndex) {
+		this.columnIndex = columnIndex;
+	}
+
+	/**
+	 * Compares the two objects provided.
+	 * 
+	 * If numbers are in the relevant string then the objects are returned in
+	 * number order (rather than string order).
+	 */
+	public int compare(Viewer viewer, Object e1, Object e2) {
+		int order = 0;
+		if (viewer instanceof TableViewer) {
+			TableViewer tv = (TableViewer) viewer;
+			Table table = tv.getTable();
+			table.setSortColumn(table.getColumn(columnIndex));
+			int idx1 = -1, idx2 = -1;
+			for (int i = 0; i < table.getItemCount(); i++) {
+				Object obj = tv.getElementAt(i);
+				if (obj.equals(e1)) {
+					idx1 = i;
+				}
+				else if (obj.equals(e2)) {
+					idx2 = i;
+				}
+				if (idx1 > 0 && idx2 > 0) {
+					break;
+				}
+			}
+
+			if (idx1 > -1 && idx2 > -1) {
+				String str1 = table.getItems()[idx1].getText(this.columnIndex);
+				String str2 = table.getItems()[idx2].getText(this.columnIndex);
+				order = str1.compareTo(str2);
+
+				try {
+					Double d1 = Double.valueOf(str1);
+					Double d2 = Double.valueOf(str2);
+					order = d1.compareTo(d2);
+				}
+				catch (NumberFormatException e) {
+					// do nothing
+				}
+
+				if (table.getSortDirection() != SWT.UP) {
+					order *= -1;
+				}
+			}
+		}
+
+		return order;
+	}
+
+	/**
+	 * The TableViewer passed in will be set up to use this sorter when a column
+	 * is clicked.
+	 */
+	public static void bind(final TableViewer tableViewer) {
+		final Table table = tableViewer.getTable();
+		for (int i = 0; i < table.getColumnCount(); i++) {
+			final int columnNum = i;
+			TableColumn column = table.getColumn(i);
+			column.addSelectionListener(new SelectionAdapter() {
+				public void widgetSelected(final SelectionEvent e) {
+					TableViewerSorter sorter = new TableViewerSorter(columnNum);
+					if (table.getSortDirection() == SWT.UP) {
+						table.setSortDirection(SWT.DOWN);
+					}
+					else if (table.getSortDirection() == SWT.DOWN) {
+						table.setSortDirection(SWT.UP);
+					}
+					else {
+						table.setSortDirection(SWT.UP);
+					}
+					tableViewer.setSorter(sorter);
+				}
+			});
+		}
+	}
+}


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