Cannot add popup to JTree
Have implemented JTree treePanel using DefaultTreeModel.
Created popupMenu.
Created JTextArea output.
In the end of createPopupMenu() method add following:
treePanel.addMouseListener(popupListener);
output.addMouseListener(popupListener);
Result: Popup added to JTextArea and didn't add to JTree.
(When I right mouse click on JTextArea, popup appears and when on JTree -- not)
What is the problem? What is difference between JTextArea and JTree?
# 2
Ok, the problem is following:
class PopupListener extends MouseAdapter {
JPopupMenu popup;
PopupListener (JPopupMenu popupMenu) {
popup = popupMenu;
}
public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}
public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}
public void maybeShowPopup(MouseEvent e) {
if (e.isPopupTregger()) {
popup.show(e.getComponent(), e.getX(), e.getY());
}
}
}
In GUImain class:
public Container createContentPane() {
...
tree = new MyTree();
contentPane.add(tree, BorderLayout.PAGE_START);
output = new JTextArea(5, 30);
contentPane.add(output, BorderLayout.PAGE_END);
...
}
public void createPopupMenu() {
JPopupMenu popup = new JPopupMenu();
// Create menu items
...
MouseListener popupListener = new PopupListener(popup);
output.addMouseListener(popupListener);
tree.addMouseListener(popupListener);
}
Popup menu appear on right click on output.
tree doesn't react on right click.
How to bind popup menu to JTree?
# 4
> Please repost using the code formatting tags so your
> code retains ity's originall formatting
class PopupListener extends MouseAdapter {
JPopupMenu popup;
PopupListener (JPopupMenu popupMenu) {
popup = popupMenu;
}
public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}
public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}
public void maybeShowPopup(MouseEvent e) {
if (e.isPopupTregger()) {
popup.show(e.getComponent(), e.getX(), e.getY());
}
}
}
In GUImain class:
public Container createContentPane() {
...
tree = new MyTree();
contentPane.add(tree, BorderLayout.PAGE_START);
output = new JTextArea(5, 30);
contentPane.add(output, BorderLayout.PAGE_END);
...
}
public void createPopupMenu() {
JPopupMenu popup = new JPopupMenu();
// Create menu items
...
MouseListener popupListener = new PopupListener(popup);
output.addMouseListener(popupListener);
tree.addMouseListener(popupListener);
}
