本文介绍了如何使一个圆角矩形的JTextField?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想打一个圆角矩形的JTextField。我写的一个子类的AbstractBorder中实现它。但是我遇到了一些问题。
我的要求是:
I want to make a round rectangle JTextField. I write a sub class of AbstractBorder to realize it.But I run into some problems.My requirement is:
我得到的是:
我的code是:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.AbstractBorder;
import javax.swing.border.EmptyBorder;
public class JTextFieldTest {
JTextField textField;
boolean activate = false;
public void createUI(){
JFrame frame = new JFrame("Test JTextField");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(true);
MainPanel mainPanel = new MainPanel();
frame.add(mainPanel,BorderLayout.CENTER);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
JTextFieldTest jTextFieldTest = new JTextFieldTest();
jTextFieldTest.createUI();
}
@SuppressWarnings("serial")
class MainPanel extends JPanel{
public MainPanel(){
textField = new JTextField("Please input:");
Font fieldFont = new Font("Arial", Font.PLAIN, 20);
textField.setFont(fieldFont);
textField.setBackground(Color.white);
textField.setForeground(Color.gray.brighter());
textField.setColumns(30);
textField.setBorder(BorderFactory.createCompoundBorder(new CustomeBorder(),
new EmptyBorder(new Insets(10, 20, 10, 20))));
textField.addActionListener(new FieldListener());
textField.addMouseListener(new FieldMouseListener());
add(textField,BorderLayout.CENTER);
setBackground(Color.blue);
setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
}
}
@SuppressWarnings("serial")
class CustomeBorder extends AbstractBorder{
@Override
public void paintBorder(Component c, Graphics g, int x, int y,
int width, int height) {
// TODO Auto-generated method stub
super.paintBorder(c, g, x, y, width, height);
g.setColor(Color.black);
g.drawRoundRect(x, y, width, height, 20, 20);
}
}
class FieldListener implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.out.println(textField.getText());
}
}
class FieldMouseListener implements MouseListener{
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
if(activate == false){
textField.setText("");
}
activate = true;
textField.setForeground(Color.black);
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
}
}
我可以用得到另一个效果
I can get another effect by using
textField.setOpaque(假);
g.setColor(Color.white);
g.drawRoundRect(X,Y,宽度 - 1,高度 - 1,20,20);
g.setColor(Color.white); g.drawRoundRect(x, y, width - 1, height - 1, 20, 20);
另一个效果是:
Another effect is:
总之,我能做些什么来实现我的要求吗?
In sum, what can I do to realize my requirement?
@Arijit,这是你的解决方案的效果,当它运行在我的电脑上。
@Arijit, it's the effect of your solution when it runs on my computer.
推荐答案
使用 TextBubbleBorder
。
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.border.AbstractBorder;
class TextBubbleBorder extends AbstractBorder {
private Color color;
private int thickness = 4;
private int radii = 8;
private int pointerSize = 7;
private Insets insets = null;
private BasicStroke stroke = null;
private int strokePad;
private int pointerPad = 4;
RenderingHints hints;
TextBubbleBorder(
Color color) {
this(color, 4, 8, 7);
}
TextBubbleBorder(
Color color, int thickness, int radii, int pointerSize) {
this.thickness = thickness;
this.radii = radii;
this.pointerSize = pointerSize;
this.color = color;
stroke = new BasicStroke(thickness);
strokePad = thickness/2;
hints = new RenderingHints(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int pad = radii + strokePad;
int bottomPad = pad + pointerSize + strokePad;
insets = new Insets(pad,pad,bottomPad,pad);
}
@Override
public Insets getBorderInsets(Component c) {
return insets;
}
@Override
public Insets getBorderInsets(Component c, Insets insets) {
return getBorderInsets(c);
}
@Override
public void paintBorder(
Component c,
Graphics g,
int x, int y,
int width, int height) {
Graphics2D g2 = (Graphics2D)g;
int bottomLineY = height-thickness-pointerSize;
RoundRectangle2D.Double bubble = new RoundRectangle2D.Double(
0+strokePad,
0+strokePad,
width-thickness,
bottomLineY,
radii,
radii
);
Polygon pointer = new Polygon();
// left point
pointer.addPoint(
strokePad+radii+pointerPad,
bottomLineY);
// right point
pointer.addPoint(
strokePad+radii+pointerPad+pointerSize,
bottomLineY);
// bottom point
pointer.addPoint(
strokePad+radii+pointerPad+(pointerSize/2),
height-strokePad);
Area area = new Area(bubble);
area.add(new Area(pointer));
g2.setRenderingHints(hints);
Area spareSpace = new Area(new Rectangle(0,0,width,height));
spareSpace.subtract(area);
g2.setClip(spareSpace);
g2.clearRect(0,0,width,height);
g2.setClip(null);
g2.setColor(color);
g2.setStroke(stroke);
g2.draw(area);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JTextField o = new JTextField(
"The quick brown fox jumps over the lazy dog!");
o.setBorder(new TextBubbleBorder(Color.MAGENTA.darker(),2,4,0));
JOptionPane.showMessageDialog(null, o);
}
});
}
}
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