Examples of org.eclipse.jface.util.ListenerList

org.eclipse.jface.util.ListenerList
This class is used to maintain a list of listeners, and is used in the implementations of several classes within JFace which allow you to register listeners of various kinds. It is a fairly lightweight object, occupying minimal space when no listeners are registered.
Note that the add method checks for and eliminates duplicates based on identity (not equality). Likewise, the remove method compares based on identity.

Use the getListeners method when notifying listeners. Note that no garbage is created if no listeners are registered. The recommended code sequence for notifying all registered listeners of say, FooListener.eventHappened, is:
```
 Object[] listeners = myListenerList.getListeners(); for (int i = 0; i < listeners.length; ++i) { ((FooListener) listeners[i]).eventHappened(event); } 
```
@deprecated Please use {@link org.eclipse.core.runtime.ListenerList} instead.Please note that the {@link #ListenerList(int)} and{@link org.eclipse.core.runtime.ListenerList#ListenerList(int)}constructors have different semantics. Please read the javadoc carefully. Also note that the equivalent of {@link #ListenerList()} is actually{@link org.eclipse.core.runtime.ListenerList#ListenerList(int)}with {@link org.eclipse.core.runtime.ListenerList#IDENTITY} asthe argument.


        /**
         * Constructs a new ItemsList.
         */
        ItemsList() {
            modelListeners = new ListenerList();
        }

View Full Code Here

        }
        this.menuItemImage = menuItemImage;
        this.menuItemText = menuItemText == null ? "" : menuItemText; //$NON-NLS-1$
        this.tooltipText = tooltipText == null ? "" : tooltipText; //$NON-NLS-1$


        listeners = new ListenerList();
    }

View Full Code Here


    /**
     * Initializes a <code>AbstractPolicyValueModifier</code> instance
     */
    public AbstractPolicyValueModifier() {
        listeners = new ListenerList();
    }

View Full Code Here

            throw new IllegalArgumentException("Cannot be null: factory."); //$NON-NLS-1$
        }
        this.duplicatesAllowed = duplicatesAllowed;
        this.factory = factory;
        this.listValidator = listValidator;
        listeners = new ListenerList();
        createControl(style, title, items);


        validatorTask = new ValidatorTaskExecutor();
        validatorTask.start();
    }

View Full Code Here

    public ListValueBuilder(Composite parent, boolean ordered,
                            SelectionDialog selectionDialog) {
        super(parent, SWT.NONE);
        this.ordered = ordered;
        this.selectionDialog = selectionDialog;
        this.listeners = new ListenerList();
        createControl();
        // create the list that will contain the items
        itemsList = new ItemsList();
        itemsList.addModifyListener(itemsListModifyListener);
        tableViewer.setInput(itemsList);

View Full Code Here

     * is associated with
     */
    public synchronized void addProjectDeviceRepositoryChangeListener(
            ProjectDeviceRepositoryChangeListener listener,
            IProject project) {
        ListenerList list = (ListenerList) listenerMap.get(project);
        if (list == null) {
            list = new ListenerList();
        }
        list.add(listener);
        listenerMap.put(project, list);
    }

View Full Code Here

     */
    public synchronized void removeProjectDeviceRepositoryChangeListener(
            ProjectDeviceRepositoryChangeListener listener,
            IProject project) {


        ListenerList listeners = (ListenerList) listenerMap.get(project);
        if (listeners != null) {
            listeners.remove(listener);
            if (listeners.size() == 0) {
                listenerMap.remove(project);
            }
        }
    }

View Full Code Here

     * Notify ProjectDeviceRepositoryChangeListeners that there has been
     * a change to a project device repository.
     * @param project the IProject whose device repository has changed
     */
    private synchronized void notifyChangeListeners(IProject project) {
        ListenerList list = (ListenerList) listenerMap.get(project);
        if (list != null) {
            Object listeners [] = list.getListeners();
            for (int i = 0; i < listeners.length; i++) {
                ((ProjectDeviceRepositoryChangeListener) listeners[i]).
                        changed();
            }
        }

View Full Code Here

        if (items == null || items.length == 0) {
            throw new IllegalArgumentException("Cannot be null nor empty: items.");
        }
        this.items = items;
        imageCache = new HashMap(items.length, 1);
        listeners = new ListenerList();
        // A load factor of 1 is specified to allow the HashMap to be filled to
        // its specified capacity, without having to resize. The default load
        // factor of 0.75 means that when the HashMap is 3/4 full, it will be
        // resized by rehashing to roughly double its size.
        dropDownItemHash = new HashMap(items.length, 1);

View Full Code Here

     * Test that the adding of selection changed listeners works as expected.
     */
    public void testAddSelectionChangedListener() throws Exception {
        // Add a null listener.
        manager.addSelectionChangedListener(null);
        ListenerList listeners = getSelectionChangedListenersList();
        assertNotNull(listeners);
        assertTrue("List should be empty", listeners.isEmpty());


        // Add a non-null listener.
        final ISelectionChangedListener listener =
                new ISelectionChangedListener() {
                    public void selectionChanged(SelectionChangedEvent event) {
                    }
                };


        manager.addSelectionChangedListener(listener);
        listeners = getSelectionChangedListenersList();
        assertNotNull(listeners);
        assertEquals("List size should match", 1, listeners.size());


        // Adding the same listener again shouldn't change the size.
        manager.addSelectionChangedListener(listener);
        listeners = getSelectionChangedListenersList();
        assertNotNull(listeners);
        assertEquals("List size should match", 1, listeners.size());
    }

View Full Code Here

0 1

TOP

Related Classes of org.eclipse.jface.util.ListenerList

com.volantis.mcs.eclipse.ab.editors.devices.AbstractPolicyValueModifier

com.volantis.mcs.eclipse.common.odom.ODOMSelectionManagerTestCase

com.volantis.mcs.eclipse.controls.ColorButton

com.volantis.mcs.eclipse.controls.DialogListBuilder

com.volantis.mcs.eclipse.controls.FontSelector

com.volantis.mcs.eclipse.controls.ImageDropDown

com.volantis.mcs.eclipse.controls.ImageDropDownItem

com.volantis.mcs.eclipse.controls.ListValueBuilder

com.volantis.mcs.eclipse.controls.ListValueBuilder$ItemsList

com.volantis.mcs.eclipse.controls.ObjectDialogListBuilder

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.