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