J2ME GUI实战之三 ----------LWUIT实现切换特效

来源：互联网发布：三国志13全武将数据编辑：程序博客网时间：2024/05/24 23:14
本文来自：http://blog.csdn.net/hellogv/ ，转载必须注明出处！
以上第一幅图是窗体切换特效之一；第二幅图是控件切换特效之一

以下给出设置特效的代码，这些代码同样来自Sample例子中：
/*
 * 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.ButtonGroup;
import com.sun.lwuit.CheckBox;
import com.sun.lwuit.Command;
import com.sun.lwuit.Component;
import com.sun.lwuit.Container;
import com.sun.lwuit.Dialog;
import com.sun.lwuit.Display;
import com.sun.lwuit.Form;
import com.sun.lwuit.Label;
import com.sun.lwuit.M3G;
import com.sun.lwuit.RadioButton;
import com.sun.lwuit.TextArea;
import com.sun.lwuit.TextField;
import com.sun.lwuit.animations.CommonTransitions;
import com.sun.lwuit.animations.Transition;
import com.sun.lwuit.animations.Transition3D;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BoxLayout;
import com.sun.lwuit.layouts.FlowLayout;
import com.sun.lwuit.plaf.Style;
/**
 * Transitons between screens
 *
 * @author Shai Almog
 */
public class TransitionDemo extends Demo {
    /**
     * The selected radio button index 
     */
    private static int selectedIndex = 0;
    public String getName() {
        return "Transitions";
    }
    protected String getHelp() {
        return "Transitions appear when switching from one form to the next, a transition can be bound " +
            "to the operation of exiting or entering the screen. There are default transitions in the toolkit " +
            "and custom transitions are easy to write.";
    }
    private RadioButton createRB(String label, ButtonGroup g, Form f) {
        RadioButton b = new RadioButton(label);
        Style s = b.getStyle();
        s.setMargin(0, 0, 0, 0);
        s.setBgTransparency(70);
        g.add(b);
        f.addComponent(b);
        return b;
    }
    
    protected void execute(final Form f) {
        f.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
        Label title = new Label("Please select a transition type:");
        title.getStyle().setMargin(0, 0, 0, 0);
        title.getStyle().setBgTransparency(70);
        f.addComponent(title);
        final ButtonGroup radioButtonGroup = new ButtonGroup();
        createRB("Slide Horizontal", radioButtonGroup, f);
        createRB("Slide Vertical", radioButtonGroup, f);
        createRB("Fade", radioButtonGroup, f);
        if(M3G.isM3GSupported()) {
            createRB("Rotate", radioButtonGroup, f);
            createRB("Fly In", radioButtonGroup, f);
            createRB("Cube", radioButtonGroup, f);
            createRB("Static Rotation", radioButtonGroup, f);
            createRB("Swing Top", radioButtonGroup, f);
            createRB("Swing Bottom", radioButtonGroup, f);
        }
        radioButtonGroup.setSelected(selectedIndex);
        final TextField speed = new TextField("500");
        speed.setConstraint(TextArea.NUMERIC);
        speed.setInputModeOrder(new String[] {"123"});
        f.addComponent(createPair("Speed", speed));
        final Form destination = new Form("Destination");
        destination.addComponent(new Label("This is the transition destination..."));
        destination.addCommand(new Command("Back") {
            public void actionPerformed(ActionEvent evt) {
                f.show();
            }
        });
        
        final CheckBox highQuality = new CheckBox("High Quality");
        highQuality.setSelected(!Display.getInstance().isLightMode());
        highQuality.getStyle().setBgTransparency(0);
        f.addComponent(highQuality);
        highQuality.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                if(Display.getInstance().isLightMode()) {
                    Dialog.show("Warning", "The device seems a bit weak for high quality rendering, " +
                        "using this mode might crash your device.", "OK", null);
                }
            }
        });
        final Button updateButton = new Button("Preview Transition");
        final Button applyButton = new Button("Apply Transition");
        final Button applyMenu = new Button("Apply To Menu");
        final Button applyComponents = new Button("Apply To Components");
        updateButton.setAlignment(Button.CENTER);
        updateButton.getStyle().setPadding(5, 5, 7, 7);
        applyButton.setAlignment(Button.CENTER);
        applyButton.getStyle().setPadding(5, 5, 7, 7);
        ActionListener listener = new ActionListener() {
            public void actionPerformed(ActionEvent ev) {
                int runSpeed = Integer.parseInt(speed.getText());
                Transition in, out;//in 表示窗体切入时使用的特效，out表示窗体切出时使用的特性
                switch (radioButtonGroup.getSelectedIndex()) {
                    case 0: {
                        out = CommonTransitions.createSlide(CommonTransitions.SLIDE_HORIZONTAL, false, runSpeed);
                        in = CommonTransitions.createSlide(CommonTransitions.SLIDE_HORIZONTAL, true, runSpeed);
                        break;
                    }
                    case 1: {
                        out = CommonTransitions.createSlide(CommonTransitions.SLIDE_VERTICAL, false, runSpeed);
                        in = CommonTransitions.createSlide(CommonTransitions.SLIDE_VERTICAL, true, runSpeed);
                        break;
                    }
                    case 2: {
                        out = CommonTransitions.createFade(runSpeed);
                        in = CommonTransitions.createFade(runSpeed);
                        break;
                    }
                    case 3:  {
                        out = Transition3D.createRotation(runSpeed, true);
                        in = Transition3D.createRotation(runSpeed, false);
                        break;
                    }
                    case 4:  {
                        out = Transition3D.createFlyIn(runSpeed);
                        in = Transition3D.createFlyIn(runSpeed);
                        break;
                    }
                    case 5:  {
                        out = Transition3D.createCube(runSpeed, true);
                        in = Transition3D.createCube(runSpeed, false);
                        break;
                    }
                    case 6:  {
                        out = Transition3D.createStaticRotation(runSpeed, true);
                        in = Transition3D.createStaticRotation(runSpeed, false);
                        break;
                    }
                    case 7:  {
                        out = Transition3D.createSwingIn(runSpeed);
                        in = out;
                        break;
                    }
                    default:  {
                        out = Transition3D.createSwingIn(runSpeed, false);
                        in = out;
                        break;
                    }
                }
                selectedIndex = radioButtonGroup.getSelectedIndex();
                if(out instanceof Transition3D) {//这里需要设置特效效果，仅对部分特效有效
                    ((Transition3D)out).setHighQualityMode(highQuality.isSelected());
                    ((Transition3D)in).setHighQualityMode(highQuality.isSelected());
                }
                if(updateButton == ev.getSource()) {
                    //演示窗体切换特效
                    f.setTransitionOutAnimator(out);
                    f.setTransitionInAnimator(in);
                    destination.show();
                }
                else if(applyButton == ev.getSource()) {
                        //设置全部窗体在切换时都是同一个特效，注意是“窗体切换时”
                    f.setTransitionOutAnimator(null);
                    f.setTransitionInAnimator(null);
                    UIDemoMIDlet.setTransition(in, out);
                    }
/*这个函数是UIDemoMIDlet的成员函数
 *  public static void setTransition(Transition in, Transition out) {
        form.setTransitionInAnimator(in);
        form.setTransitionOutAnimator(out);
    }
*/
                else  if(applyMenu == ev.getSource()) {
                        //设置全部菜单都是同一个特效，菜单Menu就是一般在右下角弹出的
                        UIDemoMIDlet.setMenuTransition(in, out);
                }
/*这个函数是UIDemoMIDlet的成员函数
 *     public static void setMenuTransition(Transition in, Transition out) {
        form.setMenuTransitions(in, out);
        UIManager.getInstance().getLookAndFeel().setDefaultMenuTransitionIn(in);
        UIManager.getInstance().getLookAndFeel().setDefaultMenuTransitionOut(out);
    }
 */
                else if(applyComponents == ev.getSource()) {
                        //设置控件都是同一个特效，这里的控件可以是Button
                        //当Button被选中时就会显示特效
                        UIDemoMIDlet.setComponentTransition(in);
                }
/* 这个函数是UIDemoMIDlet的成员函数
 *     public static void setComponentTransition(Transition t) {
        componentTransitions = t;
        form.setSmoothScrolling(false);
    }
 */
            }
        };
        updateButton.addActionListener(listener);
        applyButton.addActionListener(listener);
        applyMenu.addActionListener(listener);
        applyComponents.addActionListener(listener);
        Container buttonPanel = new Container(new FlowLayout(Component.CENTER));
        buttonPanel.addComponent(updateButton);
        f.addComponent(buttonPanel);
        buttonPanel = new Container(new FlowLayout(Component.CENTER));
        buttonPanel.addComponent(applyButton);
        f.addComponent(buttonPanel);
        buttonPanel = new Container(new FlowLayout(Component.CENTER));
        buttonPanel.addComponent(applyMenu);
        f.addComponent(buttonPanel);
        buttonPanel = new Container(new FlowLayout(Component.CENTER));
        buttonPanel.addComponent(applyComponents);
        f.addComponent(buttonPanel);
    }    
}