从子类调用awt Frame方法

Question

这个问题是关于框架,Java和处理.

这个问题听起来很复杂,但实际上并非如此.我会尝试将其保持在最低限度.我正在迷宫游戏中创建一个小球,以便了解物理和渲染.到目前为止,这是一次很好的体验,但我打了一个砖墙.
我决定的总体布局是在AWT框架中包含PApplet并使框架关闭.之所以这样,是因为我被告知你一次只能拥有一个Papplet实例.

PApplet是Processing中的一个Applet类,一个渲染库.

我在这里有3节课,包括主要课程

public class Menu extends PApplet
{
//images and buttons 
PImage background, playbtn1, playbtn2, hsbtn1, hsbtn2, abbtn1, abbtn2, exbtn1,     exbtn2;
FBox pBtn, hBtn, eBtn;

FWorld menu;

//simple constructor
public Menu()
{

}

public void setup()
{
    size(600, 400);
    smooth();
    Fisica.init(this);
    menu = new FWorld();

    //loading and placing images
    background = loadImage("MenuAlt.jpg");
    System.out.println(background);
    playbtn1 = loadImage("play1.gif");
    playbtn2 = loadImage("play2.gif");
    hsbtn1 = loadImage("high1.gif");
    hsbtn2 = loadImage("high2.gif");
    exbtn1 = loadImage("exit1.gif");
    exbtn2 = loadImage("exit2.gif");

    //loading and placing buttons
    pBtn = new FBox(120, 150);
    pBtn.setPosition(135, 215);
    pBtn.setDrawable(false);
    hBtn = new FBox(120, 150);
    hBtn.setPosition(295, 215);
    hBtn.setDrawable(false);
    eBtn = new FBox(120, 150);
    eBtn.setPosition(455, 215);
    eBtn.setDrawable(false);

    //add item to world
    menu.add(pBtn);
    menu.add(hBtn);
    menu.add(eBtn);
}

public void draw()
{
    image(background, 0, 0);
    image(playbtn1, 80, 140);
    image(hsbtn1, 237, 135);
    image(exbtn1, 400, 140);

    mouseOver();
    menu.draw();
}

//close this frame an open a new level, high score or exit
//depending on what the use clicks
public void mousePressed()
{
    FBody pressed = menu.getBody(mouseX, mouseY);
    if (pressed == pBtn)
    {
        System.out.println("play game");
        this.getParent().getParent().getParent().getParent().setVisible(false);

        ExampleFrame x = new ExampleFrame(new Level("level1.txt"));
        x.setLocation(this.getParent().getParent().getParent().getParent().getLocation());
    }
    if (pressed == hBtn)
    {
        System.out.println("high scores");
        this.getParent().getParent().getParent().getParent().setVisible(false);

        /* these are just for finding the parent
 System.out.println(this.getName());
 System.out.println(this.getParent().getName());
 System.out.println(this.getParent().getParent().getName());
 System.out.println(this.getParent().getParent().getParent().getName());
 System.out.println(this.getParent().getParent().getParent().getParent().getName());
         */
        ExampleFrame x = new ExampleFrame(new HighScores()); //for testing, you can change this to new menu()
        x.setLocation(this.getParent().getParent().getParent().getParent().getLocation());
    }
    if (pressed == eBtn)
    {
        System.out.println("exit");
        System.exit(0);
    }
}

exampleFrame类

public class ExampleFrame extends JFrame
{
    PApplet app;

    public ExampleFrame(PApplet emApp)
    {
        super("Ball Maze Game");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocation(200, 200);

        app = emApp;
        setSize(615,438);
        setVisible(true);

        setLayout(new BorderLayout());

        add(app, BorderLayout.CENTER);
        app.init();
    }
}

主要的

public class Main
{
    public static void main(String[] args) 
    {
        ExampleFrame x = new ExampleFrame(new Menu());
    }
}

当mousePressed == ebtn时,需要发生的事情是Frame中的所有内容都将被删除,并且将加载一个Highscores Screen.高分与菜单几乎相同.没有必要发布代码,因为这里有足够的.

第二类是充当框架并保存PApplet的类

最重要的是,有没有人知道如何从PApplet调用Frame方法或以其他方式删除所有PApplet内容并加载另一个PApplet？

Answer 1

mousePressed == ebtn时需要发生的事情是Frame中的所有内容都将被删除,并且将加载一个Highscores Screen

演示.嵌套下面CardLayout添加一个ActionListener而不是一个MouseListener.它对鼠标和键盘输入都有反应.

在同一屏幕空间中包含多个GUI元素还有很多其他方法.关闭我的头顶,JTabbedPane,JSplitPane,JDesktopPane/ JInternalFrame,啪的高分JDialog或JOptionPane..

截图

CardLayoutDemo.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class CardLayoutDemo {

    public static void main(String[] args) {

        Runnable r = new Runnable () {
            public void run() {
                final JRadioButton game = new JRadioButton("Game", true);
                JRadioButton highScores = new JRadioButton("High Scores");

                ButtonGroup bg = new ButtonGroup();
                bg.add( game );
                bg.add( highScores );

                JPanel buttons = new JPanel(new 
                    FlowLayout(FlowLayout.CENTER, 5, 5));
                buttons.add( game );
                buttons.add( highScores );

                JPanel gui = new JPanel(new BorderLayout(5,5));
                gui.add(buttons, BorderLayout.SOUTH);

                final CardLayout cl = new CardLayout();
                final JPanel cards = new JPanel(cl);
                gui.add(cards);
                cards.add(new JLabel("Level 1"), "game");
                cards.add(new JLabel("High Scores"), "scores");

                ActionListener al = new ActionListener(){
                    public void actionPerformed(ActionEvent ae) {
                        if (game.isSelected()) {
                            cl.show(cards, "game");
                        } else {
                            cl.show(cards, "scores");
                        }
                    }
                };
                game.addActionListener(al);
                highScores.addActionListener(al);

                JOptionPane.showMessageDialog(null, gui);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}

Answer 2

为了回答如何从PApplet调用Frame方法？,我已将您的代码段修改为最低限度.在此修改版本中,当用户单击鼠标按钮时,将System.out触发a.

现在有两种方法可以访问您的Frame对象.但在此之前,让我说出这两点:

• 当您创建类似的PApplet new ExampleFrame(new Menu());并将其添加到您的JFrame喜欢中时,会创建一个add(app, BorderLayout.CENTER);复杂的窗口/面板层次结构.

像这样:

javax.swing.JPanel
    javax.swing.JLayeredPane
        javax.swing.JRootPane
            test.ExampleFrame

• PApplet提供用于设置和访问框架对象的公共字段.令人惊讶的是它被称为frame:).您可以在致电之前进行设置app.init();

>>代码

**查看代码中的注释**

修改了ExampleFrame.java

import java.awt.BorderLayout;    
import javax.swing.JFrame;    
import processing.core.PApplet;

public class ExampleFrame extends JFrame
{
    private static final long serialVersionUID = 4792534036194728580L;
    PApplet app;

    public ExampleFrame(PApplet emApp)
    {
        super("Ball Maze Game");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocation(200, 200);

        app = emApp;
        setSize(615,438);
        setVisible(true);

        setLayout(new BorderLayout());

        add(app, BorderLayout.CENTER);

        // Setting my frame object
        app.frame = this;       
        app.init();
    }

    // Sample Method
    public void sampleMethod(String msg)
    {
        System.out.println("I think '"+ msg +"' called me !!");
    }
}

修改了Menu.java

import java.awt.Container;

import processing.core.PApplet;
import processing.core.PImage;

public class Menu extends PApplet
{
    private static final long serialVersionUID = -6557167654705489372L;

    PImage background;
    static String tab = "";

    //simple constructor
    public Menu()
    {

    }

    public void setup()
    {
        size(600, 400);
        smooth();

        background = loadImage("C:/temp/background.jpg");
    }

    public void draw()
    {
        image(background, 0, 0);
    }

    public void mousePressed()
    {
        Container p = getParent();
        tab = "";

        // FIRST WAY OF ACCESSING PARENT FRAME
        while(p != null)
        {
            //printParentTree(p);
            if(p instanceof ExampleFrame)
            {
                ExampleFrame myframe = (ExampleFrame)p;
                myframe.sampleMethod("First Way");
                break;
            }
            p = p.getParent();
        }

        // SECOND WAY OF ACCESSING PARENT FRAME     
        if(frame != null && (frame instanceof ExampleFrame))
        {
            ExampleFrame myframe = (ExampleFrame)p;
            myframe.sampleMethod("Second Way");
        }
    }

    void printParentTree(Container p) 
    {
        System.out.println(tab+p.getClass().getName());
        tab +='\t';
    }
}

检查public void mousePressed()方法.

为了完整起见,我还包括Main.java.

public class Main {
    public static void main(String[] args){
        new ExampleFrame(new Menu());
    }
}

现在回答删除所有PApplet内容并加载另一个PApplet

好吧,我还没有测试过.但你可以添加一个JPanel你的JApplet所有绘图,即创建子控件等.当感觉像重绘然后调用JPanel.removeAll().根据javadoc:

从此容器中删除所有组件.此方法还通知布局管理器通过removeLayoutComponent方法从此容器的布局中删除组件.

这个调用之后repaint的JPanel.尝试一下,它可能会工作:).