好的,所以這是一個非常基本的例子.它需要更多的工作和優化,但應該讓你朝著正確的方向前進

import java.awt.Color;

import java.awt.Dimension;

import java.awt.EventQueue;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Point;

import java.awt.Shape;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.geom.Ellipse2D;

import java.awt.geom.Path2D;

import java.util.ArrayList;

import java.util.List;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

public class TestGraph {

public static void main(String[] args) {

new TestGraph();

}

public TestGraph() {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {

ex.printStackTrace();

}

JFrame frame = new JFrame("Testing");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.add(new GraphPane(0, 100, new int[100]));

frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

});

}

public static class GraphPane extends JPanel {

protected static final int COLUMN_WIDTH = 10;

protected static final int VERTICAL_INSETS = 10;

private int[] data;

private int minValue, maxValue;

private Path2D.Double graph;

private List buttons;

private Point mousePoint;

public GraphPane(int minValue, int maxValue, int[] data) {

this.data = data;

this.minValue = minValue;

this.maxValue = maxValue;

buttons = new ArrayList<>(data == null ? 25 : data.length);

updateView();

MouseAdapter ma = new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

updateData(e);

}

@Override

public void mouseDragged(MouseEvent e) {

updateData(e);

}

};

addMouseListener(ma);

addMouseMotionListener(ma);

}

protected void updateData(MouseEvent e) {

// Which "column" was clicked on

int column = (int) Math.round(((double) e.getX() / (double) COLUMN_WIDTH)) - 1;

// Get the "height" of the clickable area

int clickRange = getHeight() - (VERTICAL_INSETS * 2);

// Adjust the y click point for the margins...

int yPos = e.getY() - VERTICAL_INSETS;

// Calculate the vertical position that was clicked

// this ensures that the range is between 0 and clickRange

// You could choose to ignore values out side of this range

int row = Math.min(Math.max(clickRange - yPos, 0), clickRange);

// Normalise the value between 0-1

double clickNormalised = row / (double) clickRange;

// Calculate the actual row value...

row = minValue + (int) (Math.round(clickNormalised * maxValue));

// Update the data

data[column] = row;

mousePoint = new Point(

COLUMN_WIDTH + (column * COLUMN_WIDTH),

getHeight() - (VERTICAL_INSETS + (int) Math.round((data[column] / 100d) * clickRange)));

updateView();

repaint();

}

@Override

public void invalidate() {

super.invalidate();

updateView();

}

protected Shape createButton(int xPos, int yPos) {

return new Ellipse2D.Double(xPos - COLUMN_WIDTH / 2, yPos - COLUMN_WIDTH / 2, COLUMN_WIDTH, COLUMN_WIDTH);

}

protected void updateView() {

graph = new Path2D.Double();

buttons.clear();

if (data != null && data.length > 0) {

int verticalRange = getHeight() - (VERTICAL_INSETS * 2);

int xPos = COLUMN_WIDTH;

int yPos = getHeight() - (VERTICAL_INSETS + (int) Math.round((data[0] / 100d) * verticalRange));

graph.moveTo(xPos, yPos);

if (data[0] > 0) {

buttons.add(createButton(xPos, yPos));

}

for (int index = 1; index < data.length; index++) {

xPos = (index * COLUMN_WIDTH) + COLUMN_WIDTH;

yPos = getHeight() - (VERTICAL_INSETS + (int) Math.round((data[index] / 100d) * verticalRange));

graph.lineTo(xPos, yPos);

if (data[index] > 0) {

buttons.add(createButton(xPos, yPos));

}

}

}

}

@Override

public Dimension getPreferredSize() {

return new Dimension(data == null ? 0 : (data.length + 1) * COLUMN_WIDTH, 200);

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

if (data != null) {

Graphics2D g2d = (Graphics2D) g.create();

g2d.setColor(new Color(64, 64, 64, 32));

for (int index = 0; index < data.length; index++) {

int xPos = (index * COLUMN_WIDTH) + COLUMN_WIDTH;

g2d.drawLine(xPos, VERTICAL_INSETS, xPos, getHeight() - VERTICAL_INSETS);

}

g2d.setColor(Color.BLACK);

g2d.draw(graph);

for (Shape button : buttons) {

g2d.fill(button);

}

if (mousePoint != null) {

g2d.setColor(new Color(255, 192, 203));

Ellipse2D dot = new Ellipse2D.Double((mousePoint.x - COLUMN_WIDTH / 2) - 2, (mousePoint.y - COLUMN_WIDTH / 2) - 2, COLUMN_WIDTH + 4, COLUMN_WIDTH + 4);

g2d.draw(dot);

g2d.setColor(new Color(255, 192, 203, 128));

g2d.fill(dot);

}

g2d.dispose();

}

}

}

}

在任何人說我沒有填寫“填充”之前,我故意使用Path2D使其更簡單地實現;)

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