问题描述
我想知道如何自定义jtextfield的ui，这样我就可以创建圆角矩形边框，而文档不会超出边框。
I would like to know how to customize the ui of a jtextfield so I could create rounded rectangular border without the document going outside the border.
到目前为止，我认为我已经尝试了我能想到的大部分内容，我创建了一个新的FieldView类，并根据我自定义边框绘制圆形rects更改了paint方法中的形状，这是我设法摆脱白色的唯一方法textfield文档/视图是将它设置为不透明但我认为应该有另一种方法而不设置opaque值。
So far I think I have tried the most of what I can think of, I have created a new FieldView class and changed the shape in the paint method according to my customized border that draw rounded rects, the only way I sort of managed to get rid of the white textfield document/view was to set it opaque but I think there should be another way without setting the opaque value.
您是否有任何自定义jtextfield laf的经验请回信，我甚至没有运气阅读Core Swing高级书籍，如果您尝试使用google搜索，请让我知道搜索短语，因为我尝试过关键字，如造型，定制，ui，plaf，laf等等。
Have You any experience in customizing the laf of a jtextfield please write back, I have even read the Core Swing advanced book without luck and if you try searching with google please let me know the search phrase as I have tried with keywords like "styling","customizing","ui","plaf","laf" and what not.
我真诚地希望你能给我一个正确方向的推动，我希望没有人会为此做出一个火焰战争，我真的用尽了我所能想到的所有资源。
I sincerely hope you can give me a nudge in the right direction and I hope nobody will make a flamewar out of this, I have truly used all my resources I can think of.
真诚的问候。
推荐答案
昨天我想解决几乎同样的问题，我的想法得到了一些启发，我终于找到了解决方案。
I wanted to solve almost same problem yesterday and I got some inspiration by your thought and I finally find the solution.
- 要在JTextField的边框内创建文档，您可以使用
2.避免四个空白区域JTextField的角落，你可以使用
2.To avoid the white space in four corners of JTextField, you can use
在绘制圆形矩形之前。笔划的宽度取决于您的需求，只需将其宽度足以覆盖角落的空间。
before drawing the round rectangle.The width of stroke is based on your demand and just make it wide enough to cover the space in corner.
这是代码：
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
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();
mainPanel.setBorder(BorderFactory.createEmptyBorder(5, 10, 5, 10));
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();
}
public void setActivate(boolean activate){
this.activate = activate;
}
@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(15, 25, 15, 25))));
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 stubs
super.paintBorder(c, g, x, y, width, height);
Graphics2D g2d = (Graphics2D)g;
g2d.setStroke(new BasicStroke(12));
g2d.setColor(Color.blue);
g2d.drawRoundRect(x, y, width - 1, height - 1, 25, 25);
}
}
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
}
}
}
这是效果：
有关详细信息，您可以浏览
For more details , you can browse How to make a round rectangle JTextField
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