java—每次使用循环存储矩形大小

h5qlskok  于 2021-07-03  发布在  Java
关注(0)|答案(1)|浏览(417)

创建了一个类似于paint的程序，其中有一个矩形，其在屏幕内的移动可以通过“w，a，s，d”键控制，其大小可以使用鼠标上的滚动条增减。还有几个不同颜色的按钮，当按下时，这些按钮会用各自的颜色填充矩形形状。我也试着用这个矩形来画画，当我按下空格键时，我想填充指定区域所选的颜色。即使我能做到。我做的下一个动作是：要么按“w，a，s，d”键，要么按滚动条，颜色消失。现在我知道必须以某种方式保存colour或fillrect（），以便下一个操作不会影响它，但我尝试了几种方法，但都没有实现。我尝试使用循环来存储矩形的值，这样每次重新绘制时，它都会重新绘制循环中包含的所有值。但这不管用。如果它不工作，由于一些误判做说，如果不是和这个方法使用循环是错误的，请不要建议其他简单的方法来做到这一点。
所以基本上我要做的是，当按下空格键时，我想要一个那个颜色的矩形的印记，当我移开这个矩形的时候。我要留下印记。
注：我知道我的代码是穷人，并不是所有可行的，但我做这个项目与我们所教的，我希望你会提供沿着这条线的解决方案。

  1. import javax.swing.*;
  2. import java.awt.*;
  3. import java.awt.event.*;
  5. public class Animation extends Frame implements KeyListener, MouseWheelListener, ActionListener {
  7.     int x,y,a,b;
  8.     char choice1;
  9.     int draw=1;
  10.     int defaultValue=0;
  11.     int n=0;
  12.     int color1,color2,color3;
  13.     Button button1,button2,button3,button4,button5,button6,button7,button8,button9,button10,button11;
  15.     Animation() {
  16.         setSize(1000, 1000);
  17.         setVisible(true);
  18.         x = 500;
  19.         y = 500;
  20.         a = 20;
  21.         b = 50;
  23.         JPanel panel = new JPanel();
  24.         button1 = new Button("Black");
  25.         button2 = new Button("Blue");
  26.         button3 = new Button("Green");
  27.         button4 = new Button("Orange");
  28.         button5 = new Button("Red");
  29.         button6 = new Button("Yellow");
  30.         button7 = new Button("Gray");
  31.         button8 = new Button("Cyan");
  32.         button9 = new Button("Magenta");
  33.         button10 = new Button("Pink");
  34.         button11 = new Button("Default");
  36.         panel.add(button1);panel.add(button2);panel.add(button3);panel.add(button4);panel.add(button5);
  37.         panel.add(button6);panel.add(button7);panel.add(button8);panel.add(button9);panel.add(button10);
  38.         panel.add(button11);
  40.         add(panel);
  42. //        button1.setBounds(50,680,50,20); button2.setBounds(120,680,50,20);
  43. //        button3.setBounds(190,680,50,20); button4.setBounds(260,680,50,20);
  44. //        button5.setBounds(330,680,50,20); button6.setBounds(400,680,50,20);
  45. //        button7.setBounds(470,680,50,20); button8.setBounds(540,680,50,20);
  46. //        button9.setBounds(610,680,50,20); button10.setBounds(680,680,50,20);
  48.         button1.setFocusable(false);
  49.         button2.setFocusable(false);
  50.         button3.setFocusable(false);
  51.         button4.setFocusable(false);
  52.         button5.setFocusable(false);
  53.         button6.setFocusable(false);
  54.         button7.setFocusable(false);
  55.         button8.setFocusable(false);
  56.         button9.setFocusable(false);
  57.         button10.setFocusable(false);
  58.         button11.setFocusable(false);
  60.         button1.addActionListener(this);button2.addActionListener(this);
  61.         button3.addActionListener(this);button4.addActionListener(this);
  62.         button5.addActionListener(this);button6.addActionListener(this);
  63.         button7.addActionListener(this);button8.addActionListener(this);
  64.         button9.addActionListener(this);button10.addActionListener(this);
  65.         button11.addActionListener(this);
  66.         addKeyListener(this);
  67.         addMouseWheelListener(this);
  68.         addWindowListener(new WindowListener() {
  69.             @Override
  70.             public void windowOpened(WindowEvent e) {
  71.             }
  73.             @Override
  74.             public void windowClosing(WindowEvent e) {
  75.                 System.exit(0);
  76.             }
  78.             @Override
  79.             public void windowClosed(WindowEvent e) {
  80.             }
  82.             @Override
  83.             public void windowIconified(WindowEvent e) {
  84.             }
  86.             @Override
  87.             public void windowDeiconified(WindowEvent e) {
  88.             }
  90.             @Override
  91.             public void windowActivated(WindowEvent e) {
  92.             }
  94.             @Override
  95.             public void windowDeactivated(WindowEvent e) {
  96.             }
  97.         });
  98.     }
  100.     @Override
  101.     public void keyTyped(KeyEvent e) {
  102.     }
  103.     @Override
  104.     public void keyPressed(KeyEvent e) {
  105.     }
  106.     @Override
  107.     public void keyReleased(KeyEvent e) {
  108.         choice1 = e.getKeyChar();
  109.         if (choice1 == 'w') {
  110.             y = y - 10;
  111.         }
  112.         if (choice1 == 's') {
  113.             y = y + 10;
  114.         }
  115.         if (choice1 == 'a') {
  116.             x = x - 10;
  117.         }
  118.         if (choice1 == 'd') {
  119.             x = x + 10;
  120.         }
  121.         if(choice1 == ' '){
  122.             draw=2;
  123.         }
  124.         repaint();
  125.     }
  127.     @Override
  128.     public void mouseWheelMoved(MouseWheelEvent e) {
  129.         double p = e.getPreciseWheelRotation();
  130.         if(p>0){
  131.             a=a+5;
  132.             b=b+5;
  133.         } else{
  134.             a=a-5;
  135.             b=b-5;
  136.         }
  137.         repaint();
  138.     }
  139.     @Override
  140.     public void actionPerformed(ActionEvent e) {
  141.         defaultValue = 0;
  142.         if(e.getActionCommand().equals("Black")){
  143.             color1 = 0;
  144.             color2 = 0;
  145.             color3 = 0;
  146.         }
  147.         if(e.getActionCommand().equals("Blue")){
  148.             color1 = 0;
  149.             color2 = 0;
  150.             color3 = 255;
  151.         }
  152.         if(e.getActionCommand().equals("Green")){
  153.             color1 = 0;
  154.             color2 = 255;
  155.             color3 = 0;
  156.         }
  157.         if(e.getActionCommand().equals("Orange")){
  158.             color1 = 255;
  159.             color2 = 165;
  160.             color3 = 0;
  161.         }
  162.         if(e.getActionCommand().equals("Red")){
  163.             color1 = 255;
  164.             color2 = 0;
  165.             color3 = 0;
  166.         }
  167.         if(e.getActionCommand().equals("Yellow")){
  168.             color1 = 255;
  169.             color2 = 255;
  170.             color3 = 0;
  171.         }
  172.         if(e.getActionCommand().equals("Gray")){
  173.             color1 = 169;
  174.             color2 = 169;
  175.             color3 = 169;
  176.        }
  177.         if(e.getActionCommand().equals("Cyan")){
  178.             color1 = 0;
  179.             color2 = 255;
  180.             color3 = 255;
  181.         }
  182.         if(e.getActionCommand().equals("Magenta")){
  183.             color1 = 255;
  184.             color2 = 0;
  185.             color3 = 255;
  186.         }
  187.         if(e.getActionCommand().equals("Pink")){
  188.             color1 = 255;
  189.             color2 = 192;
  190.             color3 = 203;
  191.         }
  192.         if(e.getActionCommand().equals("Default")){
  193.             defaultValue = 1;
  194.         }
  195.         repaint();
  197.     }
  199.     public void paint(Graphics g) {
  200.         super.paint(g);
  201.         if(draw==1) {
  203.             if(defaultValue == 1){
  204.                 g.setColor(new Color(color1,color2,color3));
  205.                 g.drawRect(x, y, a, b);
  206.             }else{
  207.                 g.drawRect(x, y, a, b);
  208.                 g.setColor(new Color(color1,color2,color3));
  209.                 g.fillRect(x,y,a,b);
  210.             }
  212.         }
  213.         if(draw==2){
  214.             g.setColor(new Color(color1,color2,color3));
  215.             int[] temp1 = new int[50];
  216.             temp1[n] = x;
  217.             int[] temp2 = new int[50];
  218.             temp2[n] = y;
  219.             int[] temp3 = new int[50];
  220.             temp3[n] = a;
  221.             int[] temp4 = new int[50];
  222.             temp4[n] = b;
  224.             n++;
  225.             for (int i=0;i<n;i++){
  226.                 g.drawRect(x, y, a, b);
  227.                 g.fillRect(temp1[i],temp2[i],temp3[i],temp4[i]);
  228.             }
  229.             draw=1;
  230.         }
  231.     }
  233.     public static void main(String[] args) {
  234.         Animation animation = new Animation();
  236.     }
  238. }
Javaswingevent-listenerActionListenercolors

1条答案

按热度按时间
6rvt4ljy

6rvt4ljy1#

我不是一个swingMaven，但我试图修复你的代码，我认为它的工作。
进行了以下更改：
存储所有压印图像的列表（通过输入“空格键”），这将删除代码中的整数数组。
java，值对象（添加在此代码底部）
为moue-pressed动作添加了mouselistener。
对颜色组件使用颜色常量而不是int值。
基本上，点击空格键会将当前矩形添加到列表中，稍后可以重新绘制。

  1. import java.awt.Button;
  2. import java.awt.Color;
  3. import java.awt.Frame;
  4. import java.awt.Graphics;
  5. import java.awt.Point;
  6. import java.awt.event.ActionEvent;
  7. import java.awt.event.ActionListener;
  8. import java.awt.event.KeyEvent;
  9. import java.awt.event.KeyListener;
  10. import java.awt.event.MouseEvent;
  11. import java.awt.event.MouseListener;
  12. import java.awt.event.MouseWheelEvent;
  13. import java.awt.event.MouseWheelListener;
  14. import java.awt.event.WindowEvent;
  15. import java.awt.event.WindowListener;
  16. import java.util.ArrayList;
  17. import java.util.List;
  19. import javax.swing.JPanel;
  21. public class Animation extends Frame implements KeyListener, MouseWheelListener,MouseListener, ActionListener {
  23.     /**
  24.      * 
  25.      */
  26.     private static final long serialVersionUID = 1L;
  27.     int x,y,a,b;
  28.     char choice1;
  29.     int defaultValue=0;
  30.     int number=0;
  31.     Color cursorColor = Color.BLACK;
  32.     boolean isImprint = false;
  33.     private Rectangle baseRect =  null;
  34.     private List<Rectangle> lstImprints = new ArrayList<Rectangle>();
  35.     Button button1,button2,button3,button4,button5,button6,button7,button8,button9,button10,button11;
  37.     Animation() {
  38.         System.out.println("animation ");
  39.         setSize(1000, 1000);
  40.         setVisible(true);
  41.         x = 500;
  42.         y = 500;
  43.         a = 20;
  44.         b = 50;
  45.         baseRect = new Rectangle(x, y, a, b, cursorColor);
  46.         JPanel panel = new JPanel();
  47.         button1 = new Button("Black");
  48.         button2 = new Button("Blue");
  49.         button3 = new Button("Green");
  50.         button4 = new Button("Orange");
  51.         button5 = new Button("Red");
  52.         button6 = new Button("Yellow");
  53.         button7 = new Button("Gray");
  54.         button8 = new Button("Cyan");
  55.         button9 = new Button("Magenta");
  56.         button10 = new Button("Pink");
  57.         button11 = new Button("Default");
  59.         panel.add(button1);panel.add(button2);panel.add(button3);panel.add(button4);panel.add(button5);
  60.         panel.add(button6);panel.add(button7);panel.add(button8);panel.add(button9);panel.add(button10);
  61.         panel.add(button11);
  63.         add(panel);
  65.         //        button1.setBounds(50,680,50,20); button2.setBounds(120,680,50,20);
  66.         //        button3.setBounds(190,680,50,20); button4.setBounds(260,680,50,20);
  67.         //        button5.setBounds(330,680,50,20); button6.setBounds(400,680,50,20);
  68.         //        button7.setBounds(470,680,50,20); button8.setBounds(540,680,50,20);
  69.         //        button9.setBounds(610,680,50,20); button10.setBounds(680,680,50,20);
  71.         button1.setFocusable(false);
  72.         button2.setFocusable(false);
  73.         button3.setFocusable(false);
  74.         button4.setFocusable(false);
  75.         button5.setFocusable(false);
  76.         button6.setFocusable(false);
  77.         button7.setFocusable(false);
  78.         button8.setFocusable(false);
  79.         button9.setFocusable(false);
  80.         button10.setFocusable(false);
  81.         button11.setFocusable(false);
  83.         button1.addActionListener(this);button2.addActionListener(this);
  84.         button3.addActionListener(this);button4.addActionListener(this);
  85.         button5.addActionListener(this);button6.addActionListener(this);
  86.         button7.addActionListener(this);button8.addActionListener(this);
  87.         button9.addActionListener(this);button10.addActionListener(this);
  88.         button11.addActionListener(this);
  89.         this.addMouseListener(this);
  90.         addKeyListener(this);
  91.         addMouseWheelListener(this);
  92.         addWindowListener(new WindowListener() {
  93.             @Override
  94.             public void windowOpened(WindowEvent e) {
  95.             }
  97.             @Override
  98.             public void windowClosing(WindowEvent e) {
  99.                 System.exit(0);
  100.             }
  102.             @Override
  103.             public void windowClosed(WindowEvent e) {
  104.             }
  106.             @Override
  107.             public void windowIconified(WindowEvent e) {
  108.             }
  110.             @Override
  111.             public void windowDeiconified(WindowEvent e) {
  112.             }
  114.             @Override
  115.             public void windowActivated(WindowEvent e) {
  116.             }
  118.             @Override
  119.             public void windowDeactivated(WindowEvent e) {
  120.             }
  121.         });
  122.     }
  124.     @Override
  125.     public void keyTyped(KeyEvent e) {
  126.     }
  127.     @Override
  128.     public void keyPressed(KeyEvent e) {
  129.     }
  130.     @Override
  131.     public void keyReleased(KeyEvent e) {
  132.         choice1 = e.getKeyChar();
  133.         if (choice1 == 'w') {
  134.             //y = y - 10;
  135.             baseRect.setY(baseRect.getY()-10);
  136.         }
  137.         if (choice1 == 's') {
  138.             //y = y + 10;
  139.             baseRect.setY(baseRect.getY()+10);
  140.         }
  141.         if (choice1 == 'a') {
  142.             //x = x - 10;
  143.             baseRect.setX(baseRect.getX()-10);
  144.         }
  145.         if (choice1 == 'd') {
  146.             //x = x + 10;
  147.             baseRect.setX(baseRect.getX()-10);
  148.         }
  149.         if(choice1 == ' '){
  150.             isImprint = true;
  151.         }
  153.         System.out.println("choice 1"+choice1);
  154.         repaint();
  155.     }
  157.     @Override
  158.     public void mouseWheelMoved(MouseWheelEvent e) {
  159.         double p = e.getPreciseWheelRotation();
  160.         if(p>0){
  161.             baseRect.setHeight(baseRect.getHeight()+5);
  162.             //b=b+5;
  163.             baseRect.setWidth(baseRect.getWidth()+5);
  164.         } else{
  165.             baseRect.setHeight(baseRect.getHeight()-5);
  166.             baseRect.setWidth(baseRect.getWidth()-5);
  167.             //b=b-5;
  168.         }
  169.         repaint();
  170.     }
  171.     @Override
  172.     public void actionPerformed(ActionEvent e) {
  174.         System.out.println("action performed");
  175.         defaultValue = 0;
  176.         if(e.getActionCommand().equals("Black")){
  177.             cursorColor = Color.BLACK;
  178.         }
  179.         if(e.getActionCommand().equals("Blue")){
  180.             cursorColor = Color.BLUE;
  181.         }
  182.         if(e.getActionCommand().equals("Green")){
  183.             cursorColor = Color.GREEN;
  184.         }
  185.         if(e.getActionCommand().equals("Orange")){
  186.             cursorColor = Color.ORANGE;
  187.         }
  188.         if(e.getActionCommand().equals("Red")){
  189.             cursorColor = Color.RED;
  190.         }
  191.         if(e.getActionCommand().equals("Yellow")){
  192.             cursorColor = Color.YELLOW;
  193.         }
  194.         if(e.getActionCommand().equals("Gray")){
  195.             cursorColor = Color.GRAY;
  196.         }
  197.         if(e.getActionCommand().equals("Cyan")){
  198.             cursorColor = Color.CYAN;
  199.         }
  200.         if(e.getActionCommand().equals("Magenta")){
  201.             cursorColor = Color.MAGENTA;
  202.         }
  203.         if(e.getActionCommand().equals("Pink")){
  204.             cursorColor = Color.PINK;
  205.         }
  206.         if(e.getActionCommand().equals("Default")){
  207.             defaultValue = 1;
  208.         }
  209.         repaint();
  211.     }
  213.     public void paint(Graphics g) {
  215.         System.out.println("paint ");
  216.         super.paint(g);
  218.         g.setColor(cursorColor);
  219.         g.drawRect(baseRect.getX(),baseRect.getY(),baseRect.getHeight(),baseRect.getWidth());
  220.         g.fillRect(baseRect.getX(),baseRect.getY(),baseRect.getHeight(),baseRect.getWidth());
  222.         System.out.println(lstImprints.size());
  223.         for(Rectangle rect : lstImprints){
  224.             g.setColor(rect.getColor());
  225.             g.drawRect(rect.getX(),rect.getY(),rect.getHeight(),rect.getWidth());
  226.             g.fillRect(rect.getX(),rect.getY(),rect.getHeight(),rect.getWidth());
  227.         }
  228. /*      if(defaultValue == 1){
  229.             g.setColor(cursorColor);
  230.             g.drawRect(rect.getX(),rect.getY(),rect.getHeight(),rect.getWidth());
  232.         }else{
  233.             g.drawRect(x, y, a, b);
  234.             g.setColor(cursorColor);                
  235.             g.fillRect(x,y,a,b);
  237.         }*/
  238.     }
  240.     public static void main(String[] args) {
  241.         Animation animation = new Animation();
  242.     }
  244.     @Override
  245.     public void mouseClicked(MouseEvent e) {
  246.         // TODO Auto-generated method stub
  248.     }
  250.     @Override
  251.     public void mouseEntered(MouseEvent e) {
  252.         // TODO Auto-generated method stub
  254.     }
  256.     @Override
  257.     public void mouseExited(MouseEvent e) {
  258.         // TODO Auto-generated method stub
  260.     }
  262.     @Override
  263.     public void mousePressed(MouseEvent e) {
  264.         // TODO Auto-generated method stub
  266.     }
  268.     @Override
  269.     public void mouseReleased(MouseEvent e) {
  270.         // TODO Auto-generated method stub
  271.         if(isImprint){
  272.             Point point = e.getLocationOnScreen();
  273.             Rectangle rectangle = new Rectangle(Double.valueOf(point.getX()).intValue(), Double.valueOf(point.getY()).intValue(), baseRect.getHeight(), baseRect.getWidth(),cursorColor);
  274.             lstImprints.add(rectangle);
  275.             isImprint = false;
  276.             repaint();
  277.         }
  279.     }
  281. }
  1. import java.awt.Color;
  3. public class Rectangle {
  5.     private int x;
  7.     private int y;
  9.     private int height;
  11.     private int width;
  13.     private Color color = null;
  15.     public Rectangle(int x, int y, int height, int width, Color color) {
  16.         super();
  17.         this.x = x;
  18.         this.y = y;
  19.         this.height = height;
  20.         this.width = width;
  21.         this.color = color;
  22.     }
  24.     public int getX() {
  25.         return x;
  26.     }
  28.     public void setX(int x) {
  29.         this.x = x;
  30.     }
  32.     public int getY() {
  33.         return y;
  34.     }
  36.     public void setY(int y) {
  37.         this.y = y;
  38.     }
  40.     public int getHeight() {
  41.         return height;
  42.     }
  44.     public void setHeight(int height) {
  45.         this.height = height;
  46.     }
  48.     public int getWidth() {
  49.         return width;
  50.     }
  52.     public void setWidth(int width) {
  53.         this.width = width;
  54.     }
  56.     public Color getColor() {
  57.         return color;
  58.     }
  60.     public void setColor(Color color) {
  61.         this.color = color;
  62.     }
  63. }
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