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The Java Developers Almanac 1.4Order this book from Amazon. |
e785. Listening for Changes to the Items in a JList ComponentWhen the set of items in a list component is changed, a list data event is fired.// Create a list that allows adds and removes; // see e778 Adding and Removing an Item in a JList Component // Register a list data listener DefaultListModel model = (DefaultListModel)list.getModel(); model.addListDataListener(new MyListDataListener()); class MyListDataListener implements ListDataListener { // This method is called when new items have been added to the list public void intervalAdded(ListDataEvent evt) { DefaultListModel model = (DefaultListModel)evt.getSource(); // Get range of new items int start = evt.getIndex0(); int end = evt.getIndex1(); int count = end-start+1; // Get new items for (int i=start; i<=end; i++) { Object item = model.getElementAt(i); } } // This method is called when items have been removed from the list public void intervalRemoved(ListDataEvent evt) { // Get range of removed items int start = evt.getIndex0(); int end = evt.getIndex1(); int count = end-start+1; // The removed items are not available } // This method is called when items in the list are replaced public void contentsChanged(ListDataEvent evt) { DefaultListModel model = (DefaultListModel)evt.getSource(); // Get range of changed items int start = evt.getIndex0(); int end = evt.getIndex1(); int count = end-start+1; // Get changed items for (int i=start; i<=end; i++) { Object item = model.getElementAt(i); } } }
e775. Setting the Dimensions of an Item in a JList Component e776. Setting a Tool Tip for an Item in a JList Component e777. Getting the Items in a JList Component e778. Adding and Removing an Item in a JList Component e779. Getting the Selected Items in a JList Component e780. Setting the Selected Items in a JList Component e781. Setting the Selection Mode of a JList Component e782. Arranging Items in a JList Component e783. Detecting Double and Triple Clicks on an Item in a JList Component e784. Listening for Changes to the Selection in a JList Component © 2002 Addison-Wesley. |