Question

I have a JTabPanel with three tabs, two of which start disabled. I want enable them when they have been given content (otherwise some of the fields and boxes are blank and/or meaningless).

It seems the only way to set whether a tab is enabled or disabled is to pass setEnabledAt an int for the tab index and the boolean. The only way I can find to pass the index of a tab to something is to use indexOfTabComponent and pass in the panel to swap to….This seems horrible, and doesn’t work. I’m getting java.lang.ArrayIndexOutOfBoundsException: -1 when I try and swap to the tab at index 1.

Is there a better way than this?

public void swapView(JPanel paneToSelect) {
    myContainerPane.getMyPaneTab().setSelectedComponent(paneToSelect);
    myContainerPane.getMyPaneTab().setEnabledAt(myContainerPane.getMyPaneTab().indexOfTabComponent(paneToSelect), true);
}

The only solution I can think of is to add 2 to the index number…but it feels there should be a better way to do this.

Answer 1

The correct code to use is:

public void swapView(JPanel paneToSelect) {
    int index = myContainerPane.getMyPaneTab().indexOfComponent(paneToSelect);
    myContainerPane.getMyPaneTab().setSelectedIndex(index);
    myContainerPane.getMyPaneTab().setEnabledAt(index, true);
}

The difference being is that, for whatever reason indexOfTabComponent, does not work with my set up.