/* * Copyright ?2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * */package com.sun.lwuit.uidemo;import com.sun.lwuit.Button;import com.sun.lwuit.Form;import com.sun.lwuit.events.ActionEvent;import com.sun.lwuit.events.ActionListener;import com.sun.lwuit.layouts.BorderLayout;import com.sun.lwuit.layouts.BoxLayout;import com.sun.lwuit.layouts.FlowLayout;import com.sun.lwuit.layouts.GridLayout;/** *本例演示如何布局窗體控件 */public class LayoutDemo implements ActionListener {    public Form form = new Form("LayoutDemo");    private Button border;    private Button boxY;    private Button boxX;    private Button flow;    private Button grid;    LayoutDemo(){                form.setLayout(new BoxLayout(BoxLayout.Y_AXIS));        //BorderLayout,就是把窗體布局分成東、南、西、北、中這5部分        border = new Button("BorderLayout");        //顧名思義，設(shè)置按鈕背景的透明度,范圍0~255，可以用Util的資源編輯器來預(yù)先修改        border.getStyle().setBgTransparency(100);        //每個button都需要設(shè)計監(jiān)聽事件        border.addActionListener(this);        //BoxLayout-Y，就是把控件從上往下排列        boxY = new Button("BoxLayout-Y");        boxY.getStyle().setBgTransparency(100);        boxY.addActionListener(this);        //BoxLayout-X，就是把控件從左往右排列        boxX = new Button("BoxLayout-X");        boxX.getStyle().setBgTransparency(100);        boxX.addActionListener(this);        //FlowLayout，就是把控件按行排列，一行裝不下則放到第二行......        flow = new Button("FlowLayout");        flow.getStyle().setBgTransparency(100);        flow.addActionListener(this);        //GridLayout,這就是實現(xiàn)九宮圖的排列方式！！！！！        grid = new Button("GridLayout");        grid.getStyle().setBgTransparency(100);        grid.addActionListener(this);                addComponents(form);        form.show();    }    private void addComponents(final Form f){        f.removeAll();        f.addComponent(boxY);        f.addComponent(boxX);        f.addComponent(border);        f.addComponent(flow);        f.addComponent(grid);    }    public void actionPerformed(ActionEvent arg0) {        String button_name=((Button)(arg0.getSource())).getText();        if(button_name.equals("BorderLayout"))        {            form.setLayout(new BorderLayout());            form.removeAll();            form.setScrollable(false);            form.addComponent(BorderLayout.NORTH, border);            form.addComponent(BorderLayout.EAST, boxY);            form.addComponent(BorderLayout.CENTER, grid);            form.addComponent(BorderLayout.WEST, flow);            form.addComponent(BorderLayout.SOUTH, boxX);            form.show();        }        else if(button_name.equals("BoxLayout-Y"))        {            form.setLayout(new BoxLayout(BoxLayout.Y_AXIS));            form.setScrollable(false);            addComponents(form);            form.show();        }        else if(button_name.equals("FlowLayout"))        {            form.setLayout(new FlowLayout());            form.setScrollable(false);            addComponents(form);            form.show();        }        else if(button_name.equals("GridLayout"))        {            form.setLayout(new GridLayout(3, 2));            form.setScrollable(false);            addComponents(form);            form.show();        }        else if(button_name.equals("BoxLayout-X"))        {            form.setLayout(new BoxLayout(BoxLayout.X_AXIS));            form.setScrollable(true);            addComponents(form);            form.show();        }    }}