INTEGRATION: CWS vcl07 (1.2.2); FILE ADDED

2003/04/08 14:28:36 obr 1.2.2.1: re-added accessibility workbench

toolkit/test/accessibility/AccessibleTreeCellRenderer.java

+import javax.swing.tree.DefaultTreeCellRenderer;
+import javax.swing.tree.TreePath;
+import javax.swing.JTree;
+import java.awt.Color;
+import java.awt.Component;
+import java.util.Vector;
+
+
+public class AccessibleTreeCellRenderer
+    extends DefaultTreeCellRenderer
+{
+    public Color
+        maDefaultColor,
+        maChangedColor;
+    protected Vector
+        maChangedLines;
+
+
+
+    public AccessibleTreeCellRenderer ()
+    {
+        maDefaultColor = Color.black;
+        maChangedColor = Color.red;
+        maChangedLines = new Vector ();
+    }
+
+    public Component getTreeCellRendererComponent (
+        JTree tree,
+        Object value,
+        boolean sel,
+        boolean expanded,
+        boolean leaf,
+        int row,
+        boolean hasFocus)
+    {
+        super.getTreeCellRendererComponent(
+            tree, value, sel,
+            expanded, leaf, row,
+            hasFocus);
+
+        if (maChangedLines.size()<=row || maChangedLines.elementAt (row) == null)
+            setTextNonSelectionColor (maDefaultColor);
+        else
+            setTextNonSelectionColor (maChangedColor);
+
+        return this;
+    }
+
+    /** Tell the cell renderer that no changes shall be displayed anymore.
+    */
+    public void clearAllChanges ()
+    {
+        maChangedLines.clear();
+    }
+
+    /** Inform the cell renderer of a new changed line which to paint
+        highlighted when asked to paint it the next time.
+    */
+    public void addChangedLine (int nRow)
+    {
+        if (maChangedLines.size() <= nRow)
+            maChangedLines.setSize (nRow+1);
+        nRow -= 1; // row index is one to large for some reason.
+        maChangedLines.set (nRow, new Boolean (true));
+    }
+
+    /** Inform the cell renderer of a set of changed line which to paint
+        highlighted when asked to paint them the next time.
+        @param aChangedNodes
+            The set of changed nodes.  Each entry is a TreePath.
+        @param aTree
+            The JTree that is used to transform the given TreePath objects
+            into rows.
+    */
+    public void addChangedNodes (Vector aChangedNodes, JTree aTree)
+    {
+        for (int i=0; i<aChangedNodes.size(); i++)
+        {
+            TreePath aPath = (TreePath)aChangedNodes.elementAt (i);
+            int nRow = aTree.getRowForPath (aPath);
+            addChangedLine (nRow);
+        }
+    }
+
+}
+