Java 如何根据二维网格上的路径为线设置不同的颜色_Java_Swing_2d

Java 如何根据二维网格上的路径为线设置不同的颜色

java swing

Java 如何根据二维网格上的路径为线设置不同的颜色,java,swing,2d,Java,Swing,2d,我有一个简单的程序，从一个单元到另一个单元绘制线，形成一条路径。我有两组路径：一组由红细胞形成，另一组由蓝细胞形成。我一次只能设置一种颜色，这两种颜色都适用现在我要做的是设置线条的颜色以匹配单元格的颜色，每组都有自己的线条颜色。我使用自定义绘画在玻璃窗格上用以下代码绘制线条： @Override public void paintComponent(Graphics g) { super.paintComponent(g); Graphic

我有一个简单的程序，从一个单元到另一个单元绘制线，形成一条路径。我有两组路径：一组由红细胞形成，另一组由蓝细胞形成。我一次只能设置一种颜色，这两种颜色都适用

现在我要做的是设置线条的颜色以匹配单元格的颜色，每组都有自己的线条颜色。我使用自定义绘画在

玻璃窗格

上用以下代码绘制线条：

 @Override
    public void paintComponent(Graphics g) {    
        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(Color.RED); //Lines' Color is set here
        g2d.setStroke(new BasicStroke(3));

        for(List<JLabel> line : lines) {

            for(int i=0; i <(line.size()) ; i++) {
                JLabel label1 = line.get(i);
                int n = (i == (line.size()-1)) ? 0: i+1;
                JLabel label2 = line.get(n);
                g2d.draw(new Line2D.Float(getCenter(label1), getCenter(label2)));
            }
        }

        g2d.dispose();
    }

我建议采取以下办法：
修改

Token

enum，使其保存颜色和图标信息：

enum Token {

    VIDE (Color.WHITE), CERCLE_BLEU (Color.BLUE), CERCLE_ROUGE(Color.RED);

    private static final int ICON_W = 21;
    public Color color;
    public Icon icon;

    Token(Color color) {

        this.color = color;
        icon = createIcon(color);
    }

    private Icon createIcon(Color color) {

        BufferedImage img = new BufferedImage(ICON_W, ICON_W, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = img.createGraphics();
        g2.setColor(color);
        g2.fillOval(1, 1, ICON_W - 2, ICON_W - 2);
        g2.dispose();

        return new ImageIcon(img);
    }
}

子类

JLabel

创建可使用

令牌初始化的JLabel
：
class TLabel extends JLabel{

    Token token;
    TLabel(Token token) {
        setToken(token);
    }

    void setToken(Token token) {

        this.token = token;
        setIcon(token.icon);
        setPreferredSize(new Dimension(
                token.icon.getIconWidth(), token.icon.getIconHeight()));
    }
    Token getToken() {
        return token;
    }

    Color getColor() {
        return token.color;
    }
}


请注意，TLabel
的实例包含Token
和颜色信息，具有适当的图标和正确的首选大小。

在应用程序中使用TLabel
，如下所示：
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.geom.Line2D;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;


public class Example extends JPanel {

    private TLabel[][] grid;

    List<TLabel> redCels = new ArrayList<>();
    List<TLabel> blueCells  = new ArrayList<>();
    List<List<TLabel>> paths = new ArrayList<>();

    Example(int rows, int cols) {

        setLayout(new GridLayout(rows, cols, 1, 1));
        setBorder(BorderFactory.createLineBorder(Color.BLACK));
        setBackground(Color.BLACK);
        createGrid(rows, cols);
        setTestData();
    }

    void createGrid(int rows, int cols) {

        grid = new TLabel[rows][cols];
        for (int r = 0; r < grid.length; r++) {
            for (int c = 0; c < grid[r].length; c++) {
                grid[r][c] = new TLabel(Token.VIDE);
                grid[r][c].setOpaque(true);
                grid[r][c].setBackground(Color.WHITE);
                add(grid[r][c]);
            }
        }
    }

    void setTestData() {

        //test data
        set(11, 3, Token.CERCLE_ROUGE);
        set(10, 2, Token.CERCLE_ROUGE);
        set(9, 3, Token.CERCLE_ROUGE);
        set(10, 4, Token.CERCLE_ROUGE);

        set(8, 13, Token.CERCLE_BLEU);
        set(9, 12, Token.CERCLE_BLEU);
        set(10, 13, Token.CERCLE_BLEU);
        set(9, 14, Token.CERCLE_BLEU);

        paths.add(redCels); paths.add(blueCells);
    }

    void set(int row, int col, Token token) {

        grid[row][col].setToken(token);

        if(token == Token.CERCLE_ROUGE) {
            redCels.add(grid[row][col]);
        }else {
            blueCells.add(grid[row][col]);
        }
    }

    private List<List<TLabel>> getPahs() {
        return paths;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {

                JFrame frame = new JFrame("TEST CASE");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                Example example = new Example(20, 20);
                frame.add(example);
                DrawLines glassPane = new DrawLines(example.getPahs());
                frame.setGlassPane(glassPane);
                frame.getGlassPane().setVisible(true);
                frame.setLocationRelativeTo(null);
                frame.pack();
                frame.setResizable(false);
                frame.setVisible(true);
            }
        });
    }


}

enum Token {

    VIDE (Color.WHITE), CERCLE_BLEU (Color.BLUE), CERCLE_ROUGE(Color.RED);

    private static final int ICON_W = 21;
    public Color color;
    public Icon icon;

    Token(Color color) {

        this.color = color;
        icon = createIcon(color);
    }

    private Icon createIcon(Color color) {

        BufferedImage img = new BufferedImage(ICON_W, ICON_W, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = img.createGraphics();
        g2.setColor(color);
        g2.fillOval(1, 1, ICON_W - 2, ICON_W - 2);
        g2.dispose();

        return new ImageIcon(img);
    }
}

class TLabel extends JLabel{

    Token token;
    TLabel(Token token) {
        setToken(token);
    }

    void setToken(Token token) {

        this.token = token;
        setIcon(token.icon);
        setPreferredSize(new Dimension(
                token.icon.getIconWidth(), token.icon.getIconHeight()));
    }
    Token getToken() {
        return token;
    }

    Color getColor() {
        return token.color;
    }
}

//used as glass pane to draw lines
class DrawLines extends JPanel {

    private List<List<TLabel>> lines;
    DrawLines(List<List<TLabel>> lines) {

        this.lines = lines;
        setOpaque(false);
    }

    @Override
    public void paintComponent(Graphics g) {

        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setStroke(new BasicStroke(3));

        for(List<TLabel> line : lines) {

            //use color information from TLabel
            //the whole path is of the same color so do it one per path
            g2d.setColor(line.get(0).getColor());

            for(int i=0; i <(line.size()) ; i++) {
                TLabel label1 = line.get(i);
                int n = (i == (line.size()-1)) ? 0: i+1;
                TLabel label2 = line.get(n);
                g2d.draw(new Line2D.Float(getCenter(label1), getCenter(label2)));
            }
        }

        g2d.dispose();
    }

import java.awt.BasicStroke；
导入java.awt.Color；
导入java.awt.Dimension；
导入java.awt.Graphics；
导入java.awt.Graphics2D；
导入java.awt.GridLayout；
导入java.awt.Point；
导入java.awt.geom.Line2D；
导入java.awt.image.buffereImage；
导入java.util.ArrayList；
导入java.util.List；
导入javax.swing.BorderFactory；
导入javax.swing.Icon；
导入javax.swing.ImageIcon；
导入javax.swing.JComponent；
导入javax.swing.JFrame；
导入javax.swing.JLabel；
导入javax.swing.JPanel；
导入javax.swing.SwingUtilities；
公共类示例扩展了JPanel{
专用TLabel[][]网格；
List redCels=new ArrayList（）；
List blueCells=new ArrayList（）；
列表路径=新的ArrayList（）；
示例（int行、int列）{
setLayout（新的GridLayout（行、列、1、1））；
setboorder（BorderFactory.createLineBorder（Color.BLACK））；
挫折背景（颜色：黑色）；
创建网格（行、列）；
setTestData（）；
}
void createGrid（整数行、整数列）{
网格=新的TLabel[行][列]；
对于（int r=0；r对于（int i=0；请注意，发布[mvce]也需要所有导入，我认为这是不必要的，因为IDE可以添加它们
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.geom.Line2D;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;


public class Example extends JPanel {

    private TLabel[][] grid;

    List<TLabel> redCels = new ArrayList<>();
    List<TLabel> blueCells  = new ArrayList<>();
    List<List<TLabel>> paths = new ArrayList<>();

    Example(int rows, int cols) {

        setLayout(new GridLayout(rows, cols, 1, 1));
        setBorder(BorderFactory.createLineBorder(Color.BLACK));
        setBackground(Color.BLACK);
        createGrid(rows, cols);
        setTestData();
    }

    void createGrid(int rows, int cols) {

        grid = new TLabel[rows][cols];
        for (int r = 0; r < grid.length; r++) {
            for (int c = 0; c < grid[r].length; c++) {
                grid[r][c] = new TLabel(Token.VIDE);
                grid[r][c].setOpaque(true);
                grid[r][c].setBackground(Color.WHITE);
                add(grid[r][c]);
            }
        }
    }

    void setTestData() {

        //test data
        set(11, 3, Token.CERCLE_ROUGE);
        set(10, 2, Token.CERCLE_ROUGE);
        set(9, 3, Token.CERCLE_ROUGE);
        set(10, 4, Token.CERCLE_ROUGE);

        set(8, 13, Token.CERCLE_BLEU);
        set(9, 12, Token.CERCLE_BLEU);
        set(10, 13, Token.CERCLE_BLEU);
        set(9, 14, Token.CERCLE_BLEU);

        paths.add(redCels); paths.add(blueCells);
    }

    void set(int row, int col, Token token) {

        grid[row][col].setToken(token);

        if(token == Token.CERCLE_ROUGE) {
            redCels.add(grid[row][col]);
        }else {
            blueCells.add(grid[row][col]);
        }
    }

    private List<List<TLabel>> getPahs() {
        return paths;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {

                JFrame frame = new JFrame("TEST CASE");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                Example example = new Example(20, 20);
                frame.add(example);
                DrawLines glassPane = new DrawLines(example.getPahs());
                frame.setGlassPane(glassPane);
                frame.getGlassPane().setVisible(true);
                frame.setLocationRelativeTo(null);
                frame.pack();
                frame.setResizable(false);
                frame.setVisible(true);
            }
        });
    }


}

enum Token {

    VIDE (Color.WHITE), CERCLE_BLEU (Color.BLUE), CERCLE_ROUGE(Color.RED);

    private static final int ICON_W = 21;
    public Color color;
    public Icon icon;

    Token(Color color) {

        this.color = color;
        icon = createIcon(color);
    }

    private Icon createIcon(Color color) {

        BufferedImage img = new BufferedImage(ICON_W, ICON_W, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = img.createGraphics();
        g2.setColor(color);
        g2.fillOval(1, 1, ICON_W - 2, ICON_W - 2);
        g2.dispose();

        return new ImageIcon(img);
    }
}

class TLabel extends JLabel{

    Token token;
    TLabel(Token token) {
        setToken(token);
    }

    void setToken(Token token) {

        this.token = token;
        setIcon(token.icon);
        setPreferredSize(new Dimension(
                token.icon.getIconWidth(), token.icon.getIconHeight()));
    }
    Token getToken() {
        return token;
    }

    Color getColor() {
        return token.color;
    }
}

//used as glass pane to draw lines
class DrawLines extends JPanel {

    private List<List<TLabel>> lines;
    DrawLines(List<List<TLabel>> lines) {

        this.lines = lines;
        setOpaque(false);
    }

    @Override
    public void paintComponent(Graphics g) {

        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setStroke(new BasicStroke(3));

        for(List<TLabel> line : lines) {

            //use color information from TLabel
            //the whole path is of the same color so do it one per path
            g2d.setColor(line.get(0).getColor());

            for(int i=0; i <(line.size()) ; i++) {
                TLabel label1 = line.get(i);
                int n = (i == (line.size()-1)) ? 0: i+1;
                TLabel label2 = line.get(n);
                g2d.draw(new Line2D.Float(getCenter(label1), getCenter(label2)));
            }
        }

        g2d.dispose();
    }