how to handle a button pressed when it's in a list cell

Question

I have a list of Destination objects and a class (DestinationsRenderer) which extends Container and implements ListCellRenderer to render the list. Each cell in the list has a delete button, and the button class extends Button.

What I want to do is highlight the border of the delete button when it is being pressed. I have two major issues:

• The button only reacts after it has been pressed and released, but I need it to react when it is only pressed (and a different action when it has been released)
• When I select one button, all of the buttons in the list get selected at once
• The above two I verified with log statements, but the actual border doesn't even show up

I referenced this previously answered question, but that also doesn't address the first issue.

Is it possible that the list action listener is being added in the wrong place?

Here are code snippets from the renderer:

public DestinationsRenderer(final StateMachine stateMachine){

    // other code initializing the buttons and labels
    mDeleteButton.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent evt) {
                if (mList.getSelectedIndex() < mStateMachine.getNumDestinations()) {
                    mIsDeleteSelected = true;
                    mStateMachine.deleteDestination(mList.getSelectedIndex());
                }
            }
    }
}

public Component getListCellRendererComponent(final List list,
                                              final Object value,
                                              final int index,
                                              final boolean isSelected){
    // list of Destinations
    if(mList != null){
        mList.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt){
                if(mIsDeleteSelected){

                    mIsDeleteSelected = false;    // if i take out this line of code, 
                                                  // all of the buttons get highlighted 
                                                  // when i click, 
                                                  // but if i leave it in, none of them do
                    Style style = mDeleteButton.getPressedStyle();
                    style.setBorder(Border.createLineBorder(1, 1416152));
                    mDeleteButton.setPressedStyle(style);
                    mDeleteButton.setUnselectedStyle(style);
                    mDeleteButton.setSelectedStyle(style);
                    mDeleteButton.setDisabledStyle(style);
                } else {
                    Style style = mDeleteButton.getPressedStyle();
                    style.setBorder(Border.createEmpty());
                    mDeleteButton.setPressedStyle(style);
                    mDeleteButton.setUnselectedStyle(style);
                    mDeleteButton.setSelectedStyle(style);
                    mDeleteButton.setDisabledStyle(style);
                }
            }
        });
    }
    mList = list;
    // more code handling other list cell rendering stuff
}

Answer 1

The getListCellRendererComponent is being called constantly it would be a mistake to add listeners to the List inside that method. I would suggest you to change to a Container BoxLayout Y instead of a List, it would be easier to handle buttons and events on a Container