stacklayout1.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.swt.SWT;
import org.eclipse.swt.custom.StackLayout;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class StackLayout1 {
    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------------------------

        shell.setLayout(new FillLayout()); //shell应用充满式布局
        //因为comp1容器使用stackLayout布局，所以comp1中的两个Text框是重叠在一起的
        final Composite comp1 = new Composite(shell, SWT.NONE);
        final StackLayout stackLayout = new StackLayout();
        comp1.setLayout(stackLayout);
        //在comp1中创建两个Text框
        final Text text1 = new Text(comp1, SWT.BORDER);
        text1.setText("Text1");
        final Text text2 = new Text(comp1, SWT.BORDER);
        text2.setText("Text2");

        //在一个新容器中建立两个按钮用来控制上面两个text框的显示
        Composite comp2 = new Composite(shell, SWT.NONE);
        comp2.setLayout(new RowLayout());
        //按钮button1。它控制Text1的显示
        Button button1 = new Button(comp2, SWT.NONE);
        button1.setText("显示Text1");
        button1.addSelectionListener(new SelectionAdapter() { //单击事件
                    public void widgetSelected(SelectionEvent e) {
                        /*******************************************************
                         * --------下面两句是StackLayout中控制的关键----------------
                         ******************************************************/
                        stackLayout.topControl = text1; //将t1框显示
                        comp1.layout(); //将界面刷新一下,否则显示上会没任何反映的
                    }
                });
        //按钮button2。它控制Text2的显示
        Button button2 = new Button(comp2, SWT.NONE);
        button2.setText("显示Text2");
        button2.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                stackLayout.topControl = text2;
                comp1.layout();
            }
        });

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