java 画出很多按钮_纯swing画出来的按钮。。。不使用图片

1.[代码][Java]代码

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.GradientPaint;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Paint;

import java.awt.RenderingHints;

import java.awt.Shape;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.geom.RoundRectangle2D;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JToggleButton;

import javax.swing.SwingUtilities;

import javax.swing.Timer;

public class SwitchButton extends JToggleButton implements ActionListener {

private static final int ARCNUMBER = 35;

private int currentResolution = 50;

private long cycleStart;

private Timer timer = null;

private final int MOVE_TIME = 2000;

private int moveMinX;

private int moveMaxX;

private int buttonX;

private ActionListener moveActionListener = new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

startTimer(currentResolution);

}

};

public SwitchButton() {

setBorder(null);

addActionListener(moveActionListener);

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

Graphics2D g2 = (Graphics2D) g;

Color oldColor = g2.getColor();

g2.setColor(Color.WHITE);

g2.fillRect(0, 0, getWidth(), getHeight());

g2.setColor(oldColor);

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);

Shape backgroundShape = new RoundRectangle2D.Float(1, 1, getWidth() - 2, getHeight() - 2, ARCNUMBER, ARCNUMBER);

boolean selected = getModel().isSelected();

//fill shape

Paint paint = null;

if (selected) {

paint = new GradientPaint(0, 0, new Color(45, 106, 169), 0, getHeight(), new Color(135, 183, 245));

} else {

paint = new GradientPaint(0, 0, new Color(144, 144, 144), 0, getHeight(), new Color(244, 244, 244));

}

g2.setPaint(paint);

g2.fill(backgroundShape);

//draw shape bounds

g2.setColor(Color.DARK_GRAY);

g2.draw(backgroundShape);

JLabel onLabel = new JLabel("ON");

JLabel offLabel = new JLabel("OFF");

Dimension labelSize;

//draw text. off/on

if (selected) {

oldColor = g2.getColor();

g2.setColor(Color.WHITE);

labelSize = onLabel.getPreferredSize();

g2.drawString(onLabel.getText(), getWidth() / 2 / 2 - labelSize.width / 2, getHeight() / 2 + labelSize.height / 2);

g2.setColor(oldColor);

} else {

oldColor = g2.getColor();

g2.setColor(Color.BLACK);

labelSize = offLabel.getPreferredSize();

g2.drawString(offLabel.getText(), getWidth() / 2 + labelSize.width / 2, getHeight() / 2 + labelSize.height / 2);

g2.setColor(oldColor);

}

//draw button

int buttonY = 0;

int buttonWidth = getWidth() / 2;

int buttonHeight = getHeight();

Shape buttonShape = new RoundRectangle2D.Float(buttonX, buttonY, buttonWidth, buttonHeight, ARCNUMBER, ARCNUMBER);

paint = new GradientPaint(0, 0, new Color(244, 244, 244), 0, getHeight(), new Color(144, 144, 144));

g2.setPaint(paint);

g2.fill(buttonShape);

g2.setColor(new Color(140, 140, 140));

g2.draw(buttonShape);

}

public static void main(String[] args) {

SwitchButton button = new SwitchButton();

button.setBounds(60, 10, 100, 30);

JPanel mainPane = new JPanel();

mainPane.setOpaque(true);

mainPane.setBackground(Color.WHITE);

mainPane.setLayout(null);

mainPane.add(button);

final JFrame frame = new JFrame();

frame.setTitle("SwitchButton Demo");

frame.setLayout(new BorderLayout());

frame.getContentPane().add(mainPane, BorderLayout.CENTER);

frame.setSize(233, 80);

frame.setLocationRelativeTo(null);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

SwingUtilities.invokeLater(new Runnable() {

@Override

public void run() {

frame.setVisible(true);

}

});

}

@Override

public void actionPerformed(ActionEvent e) {

long currentTime = System.nanoTime() / 1000000;

long totalTime = currentTime - cycleStart;

if (totalTime > MOVE_TIME) {

cycleStart = currentTime;

}

float fraction = (float) totalTime / MOVE_TIME;

fraction = Math.min(1.0f, fraction);

fraction = 1 - Math.abs(1 - (2 * fraction));

animate(fraction);

}

public void animate(float fraction) {

float animationFactor = (float) Math.sin(fraction * (float) Math.PI / 2);

animationFactor = Math.min(animationFactor, 1.0f);

animationFactor = Math.max(animationFactor, 0.0f);

buttonX = moveMinX + (int) (.5f + animationFactor * (float) (moveMaxX - moveMinX));

if (isSelected()) {

if (buttonX >= moveMaxX) {

timer.stop();

timer.setInitialDelay(100);

buttonX = getWidth() / 2 - 1;

}

} else {

if (buttonX - 1 <= moveMaxX) {

timer.stop();

timer.setInitialDelay(100);

buttonX = 0;

}

}

repaint();

}

private void startTimer(int resolution) {

if (timer == null) {

timer = new Timer(resolution, this);

}

if (!timer.isRunning()) {

if (isSelected()) {

moveMinX = 0;

moveMaxX = getWidth() / 2 - 1;

} else {

moveMinX = getWidth() / 2 - 1;

moveMaxX = 0;

}

timer.start();

}

}

}