uidemomidlet.java

修改LWUITDemo做出来的效果

/*
 * 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.animations.CommonTransitions;
import com.sun.lwuit.Command;
import com.sun.lwuit.Component;
import com.sun.lwuit.Dialog;
import com.sun.lwuit.Display;
import com.sun.lwuit.Form;
import com.sun.lwuit.Image;
import com.sun.lwuit.Label;
import com.sun.lwuit.animations.Transition;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.events.FocusListener;
import com.sun.lwuit.layouts.GridLayout;
import com.sun.lwuit.plaf.Style;
import com.sun.lwuit.plaf.UIManager;
import com.sun.lwuit.util.Resources;
import java.util.Hashtable;


public class UIDemoMIDlet extends javax.microedition.midlet.MIDlet implements ActionListener {

    private static final Command runCommand = new Command("Run", 1);
    private static final Command exitCommand = new Command("Exit", 2);
    private static final Command backCommand = new Command("Back", 3);

    private static final Demo[] DEMOS = new Demo[]{//每个成员代表九宫图之一
        new AnimationDemo(), new AnimationDemo(), new AnimationDemo(), new AnimationDemo(),
         new AnimationDemo(),new AnimationDemo(),new AnimationDemo(),new AnimationDemo(),
         new AnimationDemo()
    };
    private Demo currentDemo;
    private static Transition componentTransitions;
    private Hashtable demosHash = new Hashtable();
    private static Form mainMenu;//主窗体
    private int cols;
    private int elementWidth;


    protected void startApp() {
        try {
            Display.init(this);
            Resources r = Resources.open("/res/resources.res");//读取资源文件

            setMainForm(r);
        } catch (Throwable ex) {
            ex.printStackTrace();
            Dialog.show("Exception", ex.getMessage(), "OK", null);//hellogv最爱的提示框弹出方式
        }
    }


    protected void pauseApp() {
    }

    protected void destroyApp(boolean arg0) {
    }

    public static void setTransition(Transition in, Transition out) {
        mainMenu.setTransitionInAnimator(in);
        mainMenu.setTransitionOutAnimator(out);
    }

    public static void setMenuTransition(Transition in, Transition out) {
        mainMenu.setMenuTransitions(in, out);
        UIManager.getInstance().getLookAndFeel().setDefaultMenuTransitionIn(in);
        UIManager.getInstance().getLookAndFeel().setDefaultMenuTransitionOut(out);
    }

    public static void setComponentTransition(Transition t) {
        componentTransitions = t;
        mainMenu.setSmoothScrolling(false);
    }

    public static Transition getComponentTransition() {
        return componentTransitions;
    }

    private void setMainForm(Resources r) {
        //设置主题
        UIManager.getInstance().setThemeProps(r.getTheme("businessTheme"));
        mainMenu = new MainScreenForm("LWUIT Demo") ;
        int width = Display.getInstance().getDisplayWidth(); //取得全屏的宽度
        elementWidth = 0;

        //*******************窗体弹出的效果，可以实现类似IPhone、S1智能机的Touch Flo的动态窗体切换效果!**********************
        mainMenu.setTransitionOutAnimator(CommonTransitions.createSlide(CommonTransitions.SLIDE_HORIZONTAL, false, 500));
        //***************************************************************************************************************

        Image[] selectedImages = new Image[DEMOS.length];//按钮被选中时的图片
        Image[] unselectedImages = new Image[DEMOS.length];//按钮未被选中的图片

        final ButtonActionListener bAListner = new ButtonActionListener();
        for (int i = 0; i < DEMOS.length; i++) {

            //---------读取选中时的图片
            selectedImages[i] = r.getImage("Image "+String.valueOf(i+1));

            //--------读取未被选中的图片
            unselectedImages[i] = r.getImage("Image "+String.valueOf(i+1));

            final Button b = new Button(String.valueOf(i+1), unselectedImages[i])
            {
                public Image getPressedIcon() {
                    Image i = getIcon();
                    return i.scaled((int) (i.getWidth() * 0.8), (int) (i.getHeight() * 0.8));
                }
            };

            b.setRolloverIcon(selectedImages[i]);
            Style s = b.getStyle();
            s.setBorder(null);
            s.setBgTransparency(0);
            s.setBgSelectionColor(0xffffff);
            b.setAlignment(Label.CENTER);
            b.setTextPosition(Label.BOTTOM);
            mainMenu.addComponent(b);
            b.addActionListener(bAListner);
            //按钮焦点处理
            b.addFocusListener(new FocusListener() {
                public void focusGained(Component cmp) {//按钮取得焦点时
                    if (componentTransitions != null) {
                        mainMenu.replace(b, b, componentTransitions);
                    }
                }

                public void focusLost(Component cmp) {}//按钮失去焦点时
            });
            demosHash.put(b, DEMOS[i]);
            elementWidth = Math.max(b.getPreferredW(), elementWidth);
        }

        //Calculate the number of columns for the GridLayout according to the
        //screen width
        cols = width / elementWidth;
        int rows = DEMOS.length / cols;
        mainMenu.setLayout(new GridLayout(rows, cols));
        mainMenu.addCommand(exitCommand);
        mainMenu.addCommand(runCommand);

        mainMenu.setCommandListener(this);
        mainMenu.show();
    }

    /**
     * Command控件处理函数
     */
    public void actionPerformed(ActionEvent evt) {
        Command cmd = evt.getCommand();
        switch (cmd.getId()) {
            case 1:
                currentDemo = ((Demo) (demosHash.get(mainMenu.getFocused())));
                currentDemo.run(backCommand, this);
                break;
            case 2:
                notifyDestroyed();
                break;
            case 3:
                currentDemo.cleanup();
                mainMenu.refreshTheme();
                mainMenu.show();

                // for series 40 devices
                System.gc();
                System.gc();
                break;

        }
    }

    /**
     * Button控件处理函数
     */
    private class ButtonActionListener implements ActionListener {
        public void actionPerformed(ActionEvent evt) {
            currentDemo = ((Demo) (demosHash.get(evt.getSource())));
            currentDemo.run(backCommand, UIDemoMIDlet.this);
        }
    }


}