ExporterContributionItem.java 文件源码

@Override
protected Control createControl(Composite parent) {
    super.createControl(parent);
    ToolBar buttons = new ToolBar(parent, SWT.FLAT | SWT.WRAP);

    ToolItem changeImage = new ToolItem(buttons, SWT.PUSH);
    changeImage.setImage(JaspersoftStudioPlugin.getInstance().getImage("icons/resources/equalizer--arrow.png"));
    changeImage.setToolTipText("Set exporter properties");
    changeImage.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
             createPopupMenu();
             if (popupMenu.isVisible()) {
             popupMenu.setVisible(false);
         } else {
             locatePopupMenu(popupMenu);
           popupMenu.setVisible(true);
         }
        }
    });

    return buttons;
}