使用JButton在Java中创建自定义按钮
我正在尝试创建一个具有自定义形状（六边形）的按钮，但其行为类似于普通的JButton（即与ActionListener一起使用）。
我创建了一个扩展AbstractButton的类，但是单击它似乎不会向ActionListener发送事件。如果我更改类以扩展JButton，则它可以很好地工作，但是会弄乱按钮的显示方式。我假设有一种方法需要重写才能引发事件，但是我不知道它是什么。
回答：
如果要创建CustomButtonUI，则必须查看
- 最深的BasicXxxUI。
从JButton覆盖颜色列表
请注意，没有paintComponent()。是错误的，只需使用paint()方法，
如果可能的话，下面仅是一个简单示例（对于Metal JButton）。请注意，仅对于Metal LaF，我是如此懒惰，并且没有关于覆盖paintText，paintIcon，paintFocus，paintBorder的东西（对于所有功能，您必须检查BasicButtonUI的可用方法），而我放到ButtonModel上的东西只是为了我的享受。
import java.awt.*;import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.AbstractBorder;
import javax.swing.border.Border;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.metal.MetalButtonUI;
public class TextAreaInButton {
private JFrame frame = new JFrame("sssssssss");
private JButton tip1Null = new JButton(" test button ");
public TextAreaInButton() {
Border line, raisedbevel, loweredbevel, title, empty;
line = BorderFactory.createLineBorder(Color.black);
raisedbevel = BorderFactory.createRaisedBevelBorder();
loweredbevel = BorderFactory.createLoweredBevelBorder();
title = BorderFactory.createTitledBorder("");
empty = BorderFactory.createEmptyBorder(1, 1, 1, 1);
final Border compound;
Color crl = (Color.blue);
compound = BorderFactory.createCompoundBorder(empty, new OldRoundedBorderLine(crl));
Color crl1 = (Color.red);
final Border compound1;
compound1 = BorderFactory.createCompoundBorder(empty, new OldRoundedBorderLine(crl1));
Color crl2 = (Color.black);
final Border compound2;
compound2 = BorderFactory.createCompoundBorder(empty, new OldRoundedBorderLine(crl2));
tip1Null.setFont(new Font("Serif", Font.BOLD, 14));
tip1Null.setForeground(Color.darkGray);
tip1Null.setPreferredSize(new Dimension(50, 30));
tip1Null.addActionListener(new java.awt.event.ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
}
});
tip1Null.setBorderPainted(true);
tip1Null.setFocusPainted(false);
tip1Null.setBorder(compound);
tip1Null.setHorizontalTextPosition(SwingConstants.CENTER);
tip1Null.setVerticalTextPosition(SwingConstants.BOTTOM);
tip1Null.setUI(new ModifButtonUI());
tip1Null.getModel().addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
ButtonModel model = (ButtonModel) e.getSource();
if (model.isRollover()) {
tip1Null.setBorder(compound1);
} else {
tip1Null.setBorder(compound);
}
if (model.isPressed()) {
tip1Null.setBorder(compound2);
}
}
});
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(tip1Null, BorderLayout.CENTER);
frame.setLocation(150, 150);
frame.setPreferredSize(new Dimension(310, 75));
frame.setLocationRelativeTo(null);
frame.pack();
frame.setVisible(true);
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
TextAreaInButton taib = new TextAreaInButton();
}
});
}
}
class OldRoundedBorderLine extends AbstractBorder {
private final static int MARGIN = 5;
private static final long serialVersionUID = 1L;
private Color color;
OldRoundedBorderLine(Color clr) {
color = clr;
}
public void setColor(Color clr) {
color = clr;
}
@Override
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
((Graphics2D) g).setRenderingHint(
RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setColor(color);
g.drawRoundRect(x, y, width, height, MARGIN, MARGIN);
}
@Override
public Insets getBorderInsets(Component c) {
return new Insets(MARGIN, MARGIN, MARGIN, MARGIN);
}
@Override
public Insets getBorderInsets(Component c, Insets insets) {
insets.left = MARGIN;
insets.top = MARGIN;
insets.right = MARGIN;
insets.bottom = MARGIN;
return insets;
}
}
class ModifButtonUI extends MetalButtonUI {
private static final ModifButtonUI buttonUI = new ModifButtonUI();
ModifButtonUI() {
}
public static ComponentUI createUI(JComponent c) {
return new ModifButtonUI();
}
@Override
public void paint(Graphics g, JComponent c) {
final Color color1 = new Color(230, 255, 255, 0);
final Color color2 = new Color(255, 230, 255, 64);
final Color alphaColor = new Color(200, 200, 230, 64);
final Color color3 = new Color(
alphaColor.getRed(), alphaColor.getGreen(), alphaColor.getBlue(), 0);
final Color color4 = new Color(
alphaColor.getRed(), alphaColor.getGreen(), alphaColor.getBlue(), 64);
super.paint(g, c);
Graphics2D g2D = (Graphics2D) g;
GradientPaint gradient1 = new GradientPaint(
0.0F, (float) c.getHeight() / (float) 2, color1, 0.0F, 0.0F, color2);
Rectangle rec1 = new Rectangle(0, 0, c.getWidth(), c.getHeight() / 2);
g2D.setPaint(gradient1);
g2D.fill(rec1);
GradientPaint gradient2 = new GradientPaint(
0.0F, (float) c.getHeight() / (float) 2, color3, 0.0F, c.getHeight(), color4);
Rectangle rec2 = new Rectangle(0, c.getHeight() / 2, c.getWidth(), c.getHeight());
g2D.setPaint(gradient2);
g2D.fill(rec2);
}
@Override
public void paintButtonPressed(Graphics g, AbstractButton b) {
paintText(g, b, b.getBounds(), b.getText());
g.setColor(Color.red.brighter());
g.fillRect(0, 0, b.getSize().width, b.getSize().height);
}
public void paintBorder(Graphics g) {
}
@Override
protected void paintFocus(Graphics g, AbstractButton b,
Rectangle viewRect, Rectangle textRect, Rectangle iconRect) {
}
}
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