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// NOTE: split back the renderer and the editor into two separate class as it provoked rendering issues when the editing occured.
/** Class that serves as the tree renderer (displays check box).
* @author Fabrice Bouyé (fabriceb@spc.int)
* @version 1.0
*/
private class CheckRenderer
extends DefaultTreeCellRenderer {
/** The delegated checkbox.
*/
private JCheckBox check = new JCheckBox();
/** Creates a new instance.
*/
public CheckRenderer() {
super();
check.setOpaque(false);
check.setHorizontalTextPosition(AbstractButton.LEADING);
check.setFocusPainted(true);
}
/** {@inheritDoc}
*/
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
//Component component = super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
TreeCell cell = (TreeCell) node.getUserObject();
//check.setForeground(component.getForeground());
//check.setBackground(component.getBackground());
check.setSelected(cell.displayed);
check.setText(cell.screenname);
check.setEnabled(cell.enabled);
String tooltip = ExtendedConstants.HTML_LABEL_PREFIX + cell.description + ExtendedConstants.HTML_LABEL_SUFFIX;
check.setToolTipText(tooltip);
return check;
}
}
/** Class that serves as the tree editor (displays check box).
* @author Fabrice Bouyé (fabriceb@spc.int)
* @version 1.0
*/
private class CheckEditor
extends DefaultTreeCellEditor implements ActionListener {
/** The delegated checkbox.
*/
private JCheckBox check = new JCheckBox();
/** A hack that prevents the check box from beeing unselectd the first time the user clicks on it.
*/
private boolean firstClick = true;
/** The editor value.
*/
private Object value;
/** The previous value.
*/
private boolean oldDisplayed;
/** Creates a new instance.
* @param displayTree The parent tree.
*/
public CheckEditor(JTree displayTree) {
super(displayTree, (DefaultTreeCellRenderer) displayTree.getCellRenderer());
check.setOpaque(false);
check.setHorizontalTextPosition(AbstractButton.LEADING);
check.addActionListener(this);
check.setFocusPainted(true);
}
/** {@inheritDoc}
*/
public void cancelCellEditing() {
super.cancelCellEditing();
//DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
//TreeCell cell = (TreeCell) node.getUserObject();
//cell.displayed = oldDisplayed;
//System.err.println("cancelCellEditing");
firstClick = true;
}
/** {@inheritDoc}
*/
public Object getCellEditorValue() {
//System.err.println("getCellEditorValue");
return value;
}
/** {@inheritDoc}
*/
public boolean isCellEditable(EventObject anEvent) {
//System.err.println("isCellEditable");
boolean result = false;
if (anEvent instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) anEvent;
// How to detect the mouse click happened ontop of the check area, not on the check label?
//if (mouseEvent.getClickCount() >= 2) {
TreePath path = displayTree.getPathForLocation(mouseEvent.getX(), mouseEvent.getY());
DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
TreeCell cell = (TreeCell) node.getUserObject();
result = cell.enabled;
//}
}
return result;
}
/** {@inheritDoc}
*/
public boolean stopCellEditing() {
boolean result = super.stopCellEditing();
//System.err.println("stopCellEditing " + result);
firstClick = true;
return result;
}
/** {@inheritDoc}
*/
public Component getTreeCellEditorComponent(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row) {
//Component component = super.getTreeCellEditorComponent(tree, value, isSelected, expanded, leaf, row);
//System.err.println("getTreeCellEditorComponent");
this.value = value;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
TreeCell cell = (TreeCell) node.getUserObject();
this.oldDisplayed = cell.displayed;
//check.setForeground(component.getForeground());
//check.setBackground(component.getBackground());
check.setSelected(cell.displayed);
check.setText(cell.screenname);
check.setEnabled(cell.enabled);
String tooltip = ExtendedConstants.HTML_LABEL_PREFIX + cell.description + ExtendedConstants.HTML_LABEL_SUFFIX;
check.setToolTipText(tooltip);
//firstClick = true;
return check;
}
/** {@inheritDoc}
*/
public void actionPerformed(ActionEvent event) {
//System.err.println("actionPerformed");
if (firstClick) {
check.setSelected(!check.isSelected());
firstClick = false;
return;
}
DefaultMutableTreeNode node = (DefaultMutableTreeNode) getCellEditorValue();
TreeCell treeCell = (TreeCell) node.getUserObject();
boolean value = check.isSelected();
treeCell.displayed = value;
enableChildren(node, value);
displayTree.repaint();
}
/** Enable/disable the children of the given node.
* @param parent The parent node.
* @param value If <CODE>true</CODE> the node will be disabled.
*/
private void enableChildren(DefaultMutableTreeNode parent, boolean value) {
int childNumber = parent.getChildCount();
for (int i = 0; i < childNumber; i++) {
DefaultMutableTreeNode child = (DefaultMutableTreeNode) parent.getChildAt(i);
TreeCell cell = (TreeCell) child.getUserObject();
cell.enabled = value;
enableChildren(child, value);
}
}
} |
[jList][checkBox]
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