创建一个圆形背景颜色的按钮Java
我有以下按钮：
JButton S1L1Reset = new JButton("Reset");
S1L1Reset.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L1Reset.setForeground(new Color(90, 90, 90));
S1L1Reset.setBackground(new Color(220, 208, 192));
S1L1Reset.setOpaque(true);
我希望按钮是圆形而不是盒装。我发现另一个帖子创建了一个类，可以使按钮的边框变圆，如下所示。
class RoundedBorder implements Border {
private int radius;
RoundedBorder(int radius) {
this.radius = radius;
}
public Insets getBorderInsets(Component c) {
return new Insets(this.radius+1, this.radius+1, this.radius+2, this.radius);
}
public boolean isBorderOpaque() {
return true;
}
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
g.drawRoundRect(x, y, width-1, height-1, radius, radius);
}
}
当我对按钮进行更改时，为了使用这个类，我得到以下代码：
JButton S1L1Reset = new JButton("Reset");
S1L1Reset.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L1Reset.setForeground(new Color(90, 90, 90));
S1L1Reset.setBackground(new Color(220, 208, 192));
S1L1Reset.setOpaque(true);
S1L1Reset.setBorderPainted(false);
S1L1Reset.setBorder(new RoundedBorder(20)); //new line of code added
然而，代码会创建一个如下所示的按钮：Button。有什么方法可以格式化按钮，使背景颜色也保持在圆形边框内。
整个代码：
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.UIManager;
import javax.swing.plaf.basic.BasicButtonUI;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.JMenu;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import java.awt.CardLayout;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import java.awt.Font;
import java.awt.Graphics;
@SuppressWarnings("rawtypes")
public class TestEnvironment {
JFrame TestEnvironmentWindow;
Vector data1 = new Vector(100);
Vector data2 = new Vector(100);
Vector data3 = new Vector(100);
JTable S1L1;
JTable S1L2;
JTable S1L3;
private DefaultTableModel dataModel1;
private DefaultTableModel dataModel2;
private DefaultTableModel dataModel3;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
TestEnvironment window = new TestEnvironment();
window.TestEnvironmentWindow.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public TestEnvironment() {
initialize();
}
private void initialize() {
TestEnvironmentWindow = new JFrame();
TestEnvironmentWindow.getContentPane().setLayout(null);
TestEnvironmentWindow.setResizable(false);
TestEnvironmentWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TestEnvironmentWindow.setTitle("Statistics Tool Kit");
TestEnvironmentWindow.setIconImage(null);
TestEnvironmentWindow.setSize(new Dimension(1000, 650));
// Content Section
final TableModel dataModel = new AbstractTableModel() {
public int getColumnCount(){
return 5;
}
public int getRowCount(){
return 10;
}
public Object getValueAt(int row, int col){
return new Integer(row*col);
}
public boolean isCellEditable(int row, int col){
return true;
}
};
JPanel Content = new JPanel();
Content.setBounds(175, 0, 825, 605);
TestEnvironmentWindow.getContentPane().add(Content);
Content.setBackground(new Color(244,244,244));
Content.setLayout(new CardLayout(0, 0));
JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
Content.add(tabbedPane);
JPanel set1Panel = new JPanel();
set1Panel.setLayout(null);
Vector<String> columnNames = new Vector<String>(2);
columnNames.addElement("X-Values");
columnNames.addElement("Y-Values");
S1L1 = new JTable(data1, columnNames);
S1L1.setFont(new Font("Work Sans", Font.PLAIN, 12));
S1L1.setGridColor(new Color(150,150,150));
JScrollPane S1L1Scroll = new JScrollPane(S1L1,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
S1L1Scroll.getVerticalScrollBar().setPreferredSize (new Dimension(0,0));
dataModel1 = new DefaultTableModel(data1, columnNames);
S1L1.setModel(dataModel1);
S1L1Scroll.setBounds(38, 50, 225, 400);
set1Panel.add(S1L1Scroll);
S1L2 = new JTable(data2, columnNames);
S1L2.setFont(new Font("Work Sans", Font.PLAIN, 12));
S1L2.setGridColor(new Color(150,150,150));
JScrollPane S1L2Scroll = new JScrollPane(S1L2,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
S1L2Scroll.getVerticalScrollBar().setPreferredSize (new Dimension(0,0));
dataModel2 = new DefaultTableModel(data2, columnNames);
S1L2.setModel(dataModel2);
S1L2Scroll.setBounds(288, 50, 225, 400);
set1Panel.add(S1L2Scroll);
S1L3 = new JTable(data3, columnNames);
S1L3.setFont(new Font("Work Sans", Font.PLAIN, 12));
S1L3.setGridColor(new Color(150,150,150));
JScrollPane S1L3Scroll = new JScrollPane(S1L3,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
S1L3Scroll.getVerticalScrollBar().setPreferredSize (new Dimension(0,0));
dataModel3 = new DefaultTableModel(data3, columnNames);
S1L3.setModel(dataModel3);
S1L3Scroll.setBounds(538, 50, 225, 400);
set1Panel.add(S1L3Scroll);
JLabel ListOneLabel = new JLabel("List 1");
ListOneLabel.setFont(new Font("Work Sans", Font.PLAIN, 16));
ListOneLabel.setHorizontalAlignment(SwingConstants.CENTER);
ListOneLabel.setBackground(new Color(220, 208, 192));
ListOneLabel.setOpaque(true);
ListOneLabel.setBounds(77, 20, 150, 20);
set1Panel.add(ListOneLabel);
JLabel ListTwoLabel = new JLabel("List 2");
ListTwoLabel.setFont(new Font("Work Sans", Font.PLAIN, 16));
ListTwoLabel.setHorizontalAlignment(SwingConstants.CENTER);
ListTwoLabel.setBackground(new Color(220, 208, 192));
ListTwoLabel.setOpaque(true);
ListTwoLabel.setBounds(327, 20, 150, 20);
set1Panel.add(ListTwoLabel);
JLabel ListThreeLabel = new JLabel("List 3");
ListThreeLabel.setFont(new Font("Work Sans", Font.PLAIN, 16));
ListThreeLabel.setHorizontalAlignment(SwingConstants.CENTER);
ListThreeLabel.setBackground(new Color(220, 208, 192));
ListThreeLabel.setOpaque(true);
ListThreeLabel.setBounds(577, 20, 150, 20);
set1Panel.add(ListThreeLabel);
JButton S1L1Reset = new JButton("Reset");
S1L1Reset.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L1Reset.setForeground(new Color(90, 90, 90));
S1L1Reset.setBackground(new Color(220, 208, 192));
S1L1Reset.setOpaque(true);
S1L1Reset.setBorderPainted(false);
S1L1Reset.setBorder(new RoundedBorder(20));
S1L1Reset.setBounds(43, 465, 100, 20);
set1Panel.add(S1L1Reset);
S1L1Reset.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
S1L1Reset.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
S1L1Reset.setForeground(new Color(90,90,90));
}
});
S1L1Reset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
deleteAllRows(dataModel1);
}
});
S1L1Reset.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
Color fillColor = c.getBackground();
g.setColor(fillColor);
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton S1L2Reset = new JButton("Reset");
S1L2Reset.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L2Reset.setForeground(new Color(90, 90, 90));
S1L2Reset.setBackground(new Color(220, 208, 192));
S1L2Reset.setOpaque(true);
S1L2Reset.setBorderPainted(false);
S1L2Reset.setBorder(new RoundedBorder(20));
S1L2Reset.setBounds(293, 465, 100, 20);
set1Panel.add(S1L2Reset);
S1L2Reset.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
S1L2Reset.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
S1L2Reset.setForeground(new Color(90,90,90));
}
});
S1L2Reset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
deleteAllRows(dataModel2);
}
});
S1L2Reset.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton S1L3Reset = new JButton("Reset");
S1L3Reset.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L3Reset.setForeground(new Color(90, 90, 90));
S1L3Reset.setBackground(new Color(220, 208, 192));
S1L3Reset.setOpaque(true);
S1L3Reset.setBorderPainted(false);
S1L3Reset.setBorder(new RoundedBorder(20));
S1L3Reset.setBounds(543, 465, 100, 20);
set1Panel.add(S1L3Reset);
S1L3Reset.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
S1L3Reset.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
S1L3Reset.setForeground(new Color(90,90,90));
}
});
S1L3Reset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
S1L3Reset.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton S1L1Save = new JButton("Save");
S1L1Save.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L1Save.setForeground(new Color(90, 90, 90));
S1L1Save.setBackground(new Color(220, 208, 192));
S1L1Save.setOpaque(true);
S1L1Save.setBorderPainted(false);
S1L1Save.setBorder(new RoundedBorder(20));
S1L1Save.setBounds(155, 465, 100, 20);
set1Panel.add(S1L1Save);
S1L1Save.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
S1L1Save.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
S1L1Save.setForeground(new Color(90,90,90));
}
});
S1L1Save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
S1L1Save.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton S1L2Save = new JButton("Save");
S1L2Save.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L2Save.setForeground(new Color(90, 90, 90));
S1L2Save.setBackground(new Color(220, 208, 192));
S1L2Save.setOpaque(true);
S1L2Save.setBorderPainted(false);
S1L2Save.setBorder(new RoundedBorder(20));
S1L2Save.setBounds(405, 465, 100, 20);
set1Panel.add(S1L2Save);
S1L2Save.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
S1L2Save.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
S1L2Save.setForeground(new Color(90,90,90));
}
});
S1L2Save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
S1L2Save.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton S1L3Save = new JButton("Save");
S1L3Save.setFont(new Font("Work Sans", Font.PLAIN, 14));
S1L3Save.setForeground(new Color(90, 90, 90));
S1L3Save.setBackground(new Color(220, 208, 192));
S1L3Save.setOpaque(true);
S1L3Save.setBorderPainted(false);
S1L3Save.setBorder(new RoundedBorder(20));
S1L3Save.setBounds(655, 465, 100, 20);
set1Panel.add(S1L3Save);
S1L3Save.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
S1L3Save.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
S1L3Save.setForeground(new Color(90,90,90));
}
});
S1L3Save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
S1L3Save.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton ClearAll = new JButton("Clear All");
ClearAll.setFont(new Font("Work Sans", Font.PLAIN, 14));
ClearAll.setForeground(new Color(90, 90, 90));
ClearAll.setBackground(new Color(220, 208, 192));
ClearAll.setOpaque(true);
ClearAll.setBorderPainted(false);
ClearAll.setBorder(new RoundedBorder(20));
ClearAll.setBounds(238, 515, 150, 25);
set1Panel.add(ClearAll);
ClearAll.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
ClearAll.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
ClearAll.setForeground(new Color(90,90,90));
}
});
ClearAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
ClearAll.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
JButton SaveAll = new JButton("Save All");
SaveAll.setFont(new Font("Work Sans", Font.PLAIN, 14));
SaveAll.setForeground(new Color(90, 90, 90));
SaveAll.setBackground(new Color(220, 208, 192));
SaveAll.setOpaque(true);
SaveAll.setBorderPainted(false);
SaveAll.setBorder(new RoundedBorder(20));
SaveAll.setBounds(410, 515, 150, 25);
set1Panel.add(SaveAll);
SaveAll.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
SaveAll.setForeground(new Color(0,0,0));
}
public void mouseExited(MouseEvent e) {
SaveAll.setForeground(new Color(90,90,90));
}
});
SaveAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
SaveAll.setUI(new BasicButtonUI() {
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
tabbedPane.add(set1Panel);
// Menu Bar Section
JPanel MenuBar = new JPanel();
MenuBar.setBackground(new Color(220, 208, 192));
MenuBar.setBounds(0, 0, 175, 605);
TestEnvironmentWindow.getContentPane().add(MenuBar);
MenuBar.setLayout(null);
// Menu Bar Section
JMenuBar menuBar = new JMenuBar();
TestEnvironmentWindow.setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenu mnEdit = new JMenu("Edit");
menuBar.add(mnEdit);
JMenu mnSearch = new JMenu("Search");
menuBar.add(mnSearch);
JMenu mnWindow = new JMenu("Window");
menuBar.add(mnWindow);
JMenu mnHelp = new JMenu("Help");
menuBar.add(mnHelp);
}
public static void deleteAllRows(final DefaultTableModel model) {
for( int i = model.getRowCount() - 1; i >= 0; i-- ) {
model.removeRow(i);
}
}
}
2 个答案:
答案 0 :(得分：2)
swing组件使用UI委托绘制自己，背景绘画在基类ComponentUI中完成，如下所示：
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
g.setColor(c.getBackground());
g.fillRect(0, 0, c.getWidth(),c.getHeight());
}
paint(g, c);
}
如您所见，它使用fillRect，因此必须以矩形方式填充背景。要更改它，请创建BasicButtonUI的子类（其子类是各种外观和感觉的UI委托），并通过填充圆形rect来覆盖此方法：
S1L1Reset.setUI(new BasicButtonUI() {
@Override
public void update(Graphics g, JComponent c) {
if (c.isOpaque()) {
Color fillColor = c.getBackground();
AbstractButton button = (AbstractButton) c;
ButtonModel model = button.getModel();
if (model.isPressed()) {
fillColor = fillColor.darker();
} else if (model.isRollover()) {
fillColor = fillColor.brighter();
}
g.setColor(fillColor);
g.fillRoundRect(0, 0, c.getWidth(),c.getHeight(), 20, 20);
}
paint(g, c);
}
});
正如您在代码中看到的，您需要处理按钮的各种状态，如鼠标按下背景，因为这些是在BasicButtonUI子类中完成的，因为您不再使用这些子类，所以您必须实现所有这是你自己。您可以参考MetalButtonUI，以获取一个按钮如何在Metal外观和放大器中的不同状态下自我绘制的示例。感觉。
也许不需要调用setBorderPainted（false）？如果你真的想要利用圆形边框，你应该需要它来画画。
答案 1 :(得分：0)
只需使用setRoundRect(double a, double y, double w, double h, double arcWidth, double arcHeight)的方法来调整RoundButton类的宽度和高度以及拐角即可。
RoundButton类扩展了JButton {
public RoundButton(String label) {
super(label);
Dimension size = getPreferredSize();
size.width = size.height = Math.max(size.width,size.height);
setPreferredSize(size);
setContentAreaFilled(false);
}
protected void paintComponent(Graphics g) {
if (getModel().isArmed()) {
g.setColor(Color.lightGray);
} else {
g.setColor(getBackground());
}
g.fillRoundRect(0, 0, 250, 50, 40, 40);
super.paintComponent(g);
}
protected void paintBorder(Graphics g) {
g.setColor(getForeground());
g.drawRoundRect(0, 0, 250, 50, 10, 10);
}
Shape shape;
public boolean contains(int x, int y) {
if (shape == null ||
!shape.getBounds().equals(getBounds())) {
shape = new RoundRectangle2D.Float(0, 0, 250, 50,10,10);
}
return shape.contains(x, y);
}
}
要使用该类，例如
JButton a = new RoundButton("ABC");
a.setBounds(400,0,250,50);
a.setForeground(Color.WHITE);
a.setBackground(Color.BLACK);
a.setFont(new Font("Roboto", Font.BOLD, 15));
panel.add(a);
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