combo1.java

Eclipse从入门到精通源代码/第二篇 SWT_JFace篇(6-16章)

/**
 * @作者：陈刚
 * @Email：[e-mail]
 * @Blog：http://blog.csdn.net/glchengang
 */
package swt;

import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Combo1 {
    public static void main(String[] args) {
        final Display display = Display.getDefault();
        final Shell shell = new Shell();
        shell.setSize(327, 253);
        shell.setText("SWT Application");
        //------------------新插入的界面核心代码------------------------

        final Combo combo = new Combo(shell, SWT.READ_ONLY); //定义一个只读的下拉框
        combo.setBounds(16, 11, 100, 25);
        //设值按钮
        final Button button1 = new Button(shell, SWT.NONE);
        button1.setBounds(17, 65, 100, 25);
        button1.setText("设值");
        button1.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                combo.removeAll(); //先清空combo，以防"设值"按钮多次按下时出BUG
                for (int i = 1; i <= 10; i++)
                    //循环，赋值
                    combo.add("第" + i + "个字符串"); //在combo中显示的字符串
                combo.select(0); //设置第一项为当前项
            }
        });

        //取值按钮
        final Button button2 = new Button(shell, SWT.NONE);
        button2.setBounds(136, 66, 100, 25);
        button2.setText("取值");
        button2.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                // combo.getText()得到combo中当前显示的字符串
                MessageDialog.openInformation(shell, null, combo.getText());
            }
        });

        //------------------END---------------------------------------------
        shell.layout();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}