Java 类org.eclipse.swt.dnd.DropTargetListener 实例源码

public DropTarget createDropTarget ( final Transfer[] transfers, final DropTargetListener dropTargetListener )
{
    checkWidget ();

    final DropTarget target = new DropTarget ( this.chartArea, DND.DROP_DEFAULT | DND.DROP_COPY | DND.DROP_LINK );
    target.setTransfer ( transfers );
    target.addDropListener ( dropTargetListener );
    return target;
}

public void preWindowOpen()
{
    IWorkbenchWindowConfigurer configurer = getWindowConfigurer();
    configurer.setInitialSize(new Point(800, 600));
    configurer.setShowFastViewBars(true);
    configurer.setShowStatusLine(true);
    configurer.setShowProgressIndicator(true);
    configurer.setShowCoolBar(false);

    // A DropTargetAdapter is need for editor DND support
    final DropTargetListener dtl = new EditorAreaDropAdapter(
            configurer.getWindow());
    configurer.configureEditorAreaDropListener(dtl);
}

protected void hookRecursive(Control child, DropTargetListener dropListener) {
    DropTarget childTarget = findDropTarget(child);
    if (childTarget != null) {
        registerWithExistingTarget(childTarget);
        registerDropListener(childTarget, dropListener);
    }
    if (child instanceof Composite) {
        Composite composite = (Composite) child;
        Control[] children = composite.getChildren();
        for (Control control : children) {
            hookRecursive(control, dropListener);
        }
    }
}

private void hookRecursive(Control child, DropTargetListener dropListener) {
    DropTarget childTarget = findDropTarget(child);
    if (childTarget != null) {
        registerWithExistingTarget(childTarget);
        registerDropListener(childTarget, dropListener);
    }
    if (child instanceof Composite) {
        Composite composite = (Composite) child;
        Control[] children = composite.getChildren();
        for (Control control : children) {
            hookRecursive(control, dropListener);
        }
    }
}

protected void registerDropListener(DropTarget target, DropTargetListener dropListener) {
    target.removeDropListener(dropListener);
    target.addDropListener(dropListener);
}

@Override
public void addDropSupport(int operations, Transfer[] transferTypes, DropTargetListener listener) {
    fViewer.addDropSupport(operations, transferTypes, listener);
}

private void registerDropListener(DropTarget target, DropTargetListener dropListener) {
    target.removeDropListener(dropListener);
    target.addDropListener(dropListener);
}

@Override
public void addDropSupport(int operations, Transfer[] transferTypes, DropTargetListener listener) {
    fViewer.addDropSupport(operations, transferTypes, listener);
}

/**
 * Adds support for dropping items into this viewer via a user drag-and-drop
 * operation.
 * 
 * @param operations
 *            a bitwise OR of the supported drag and drop operation types (
 *            <code>DROP_COPY</code>,<code>DROP_LINK</code>, and
 *            <code>DROP_MOVE</code>)
 * @param transferTypes
 *            the transfer types that are supported by the drop operation
 * @param listener
 *            the callback that will be invoked after the drag and drop
 *            operation finishes
 * @see org.eclipse.swt.dnd.DND
 */
public void addDropSupport(int operations, Transfer[] transferTypes,
        final DropTargetListener listener) {
    Control control = getControl();
    DropTarget dropTarget = new DropTarget(control, operations);
    dropTarget.setTransfer(transferTypes);
    dropTarget.addDropListener(listener);
}