Change JTabbedPane component on select tab

Question

I've got a JTabbedPane and i need to substitute tab 1 component when user select it. I can't directly add the right component at application start because i don't have full data to generate it.

I need something like this:

    int tabTochange = 1;
    tabbedPane.addChangeListener(new ChangeListener() {
        public void stateChanged(ChangeEvent e) {
            if (tabbedPane.getSelectedIndex() == tabTochange)
            {
                JComponent component = generataComponent();
                tabbedPane.removeTabAt(tabTochange); // Remove old tab
                // add new one
                tabbedPane.insertTab("title", null, component, "tip", tabTochange);

            }
        }
    });

But this code doesn't work, it removes the tab other tabs after tab 1 and duplicate it.

score 3 · Accepted Answer · answered May 31 '13 at 10:11

3

Instead of removeTabAt() and insertTab(), use getComponentAt(tabTochange) or getSelectedComponent() to get a reference the component. Update the component as required, perhaps using CardLayout.

answered May 31 '13 at 10:11

trashgod

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1

Using this way the tabbedPane tab 1 remaining as first created, also if i've modified the getComponentAt(tabTochange) component characteristics. Maybe i need to force some kind of redraw? – Alvins May 31 '13 at 12:00
1

The usual approach is to `revalidate()` and `repaint()`, which `CardLayout` handles for you. – trashgod May 31 '13 at 14:01

score 2 · Answer 2 · answered May 31 '13 at 10:10

I think that JTabbedPane / CardLayout was developed as static GUI without add/remove/modify Tabs/Cards, not to change number, orders, numbers of Tabs/Cards on runtime, even though it is possible
you would need to solve bunch of side effects, to hold tabs (indexing and its JComponents ) in secondary array
put JList (JTree depends of structure) on left side of JFrame, create a JPanel to each of Items/Nodes, put these JPanels to CardLayout, add proper List(Tree)SelectionListener, then selection from mouse/keyboard will firing switch between card, nothing in this stucture is dynamic (except value in JComponents), everything is prepared on GUI startup

score 0 · Answer 3 · answered May 31 '13 at 10:13

If tab1 has an index of 1, and tab2 has an index of 2. After you remove tab1, wouldn't tab2 now have an index of 1? So, when you go to add a new tab with an index of 1, it won't work. Maybe there is a way of just changing tab1.

Also, each tab should contain a JPanel, so it might be worth just changing the relevant JPanel, and the tab's title text.

I know this doesn't completely answer your question, but I don't think I have enough points to just put it as a comment. Hope this helps :)

Change JTabbedPane component on select tab

3 Answers3