Eclipse开发经典教程：展现组件

public class ToolBarExample {
Display display = new Display();
Shell shell = new Shell(display);
ToolBar toolBar;
public ToolBarExample() {
//添加工具栏 
toolBar = new ToolBar(shell, SWT.FLAT | SWT.WRAP | SWT.RIGHT);
//添加工具项 
ToolItem itemPush = new ToolItem(toolBar, SWT.PUSH);
itemPush.setText("PUSH item");
//设置工具项的显示图标
//Image icon = new Image(shell.getDisplay(), "icons/new.gif");
//itemPush.setImage(icon); 
ToolItem itemCheck = new ToolItem(toolBar, SWT.CHECK);
itemCheck.setText("CHECK item");
ToolItem itemRadio1 = new ToolItem(toolBar, SWT.RADIO);
itemRadio1.setText("RADIO item 1");
ToolItem itemRadio2 = new ToolItem(toolBar, SWT.RADIO);
itemRadio2.setText("RADIO item 2");
ToolItem itemSeparator = new ToolItem(toolBar, SWT.SEPARATOR);
final ToolItem itemDropDown = new ToolItem(toolBar, SWT.DROP_DOWN);
itemDropDown.setText("DROP_DOWN item");
itemDropDown.setToolTipText("Click here to see a drop down menu ...");
final Menu menu = new Menu(shell, SWT.POP_UP);
new MenuItem(menu, SWT.PUSH).setText("Menu item 1");
new MenuItem(menu, SWT.PUSH).setText("Menu item 2");
new MenuItem(menu, SWT.SEPARATOR);
new MenuItem(menu, SWT.PUSH).setText("Menu item 3");
//设置工具项的事件监听器 
itemDropDown.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
if (event.detail == SWT.ARROW) {
Rectangle bounds = itemDropDown.getBounds();
Point point = toolBar.toDisplay(bounds.x, bounds.y
+ bounds.height);
//设置菜单的显示位置 
menu.setLocation(point);
menu.setVisible(true);
}
}
});
//设置工具项的事件监听器 
Listener selectionListener = new Listener() {
public void handleEvent(Event event) {
ToolItem item = (ToolItem) event.widget;
System.out.println(item.getText() + " is selected");
if ((item.getStyle() & SWT.RADIO) != 0
|| (item.getStyle() & SWT.CHECK) != 0)
System.out.println("Selection status: "
+ item.getSelection());
}
};
itemPush.addListener(SWT.Selection, selectionListener);
itemCheck.addListener(SWT.Selection, selectionListener);
itemRadio1.addListener(SWT.Selection, selectionListener);
itemRadio2.addListener(SWT.Selection, selectionListener);
itemDropDown.addListener(SWT.Selection, selectionListener);
toolBar.pack();
shell.addListener(SWT.Resize, new Listener() {
public void handleEvent(Event event) {
Rectangle clientArea = shell.getClientArea();
toolBar.setSize(toolBar.computeSize(clientArea.width,
SWT.DEFAULT));
}
});
shell.setSize(400, 100);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
public static void main(String[] args) {
new ToolBarExample();
}
}