java - JTextPane 在突出显示和滚动时具有重叠文本
问题描述
我的问题是,每当我的 JTextPane 被用户突出显示或用户滚动时,JTextPane 中的文本都会多次重叠,并且颜色会经常变化。
我尝试寻找其他答案,但我当前的代码允许将 JTextPane 添加到 JScrollPane 中,该 JScrollPane 将添加到 JLayeredPane 中,然后将其添加到扩展 JFrame 的类中
public class View extends JFrame {
private static final long serialVersionUID = 1L;
final Dimension SIZE = new Dimension(2661, 1663);
/**
* @return the pre-determined size of the JFrame
*/
public Dimension getDimensionSize() {
return SIZE;
}
public View(){
setTitle("Warframe Alert/Invasion Tracker - Project 4");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
createPanel();
pack();
setLocation(0,0);
setVisible(true);
}
public void createPanel(){
JTextPane textPane = new JTextPane();
Font font = new Font("Apple Casual", Font.PLAIN, 35);
textPane.setEditable(false);
textPane.setBackground(new Color(0, 200, 255, 50));
textPane.setText(Content.getAlertText()); //Content class is a class that creates the content to show on the textPane
textPane.setForeground(Color.black);
textPane.setFont(font);
JScrollPane scrollPane = new JScrollPane(textPane, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPane.setBounds(50, 50, 1331, 1331);
JLabel background = new JLabel(new ImageIcon("..\\Project 4\\img\\bg.jpg"));
background.setBounds(0, 0, 2661, 1663);
JLayeredPane layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(getDimensionSize());
layeredPane.add(background);
layeredPane.add(scrollPane);
this.getContentPane().add(layeredPane, BorderLayout.CENTER);
}
}
这是我得到的结果的图像:
解决方案
正如@MadProgrammer 所说,问题在于在颜色选择中使用 alpha 参数。使用注释掉的每个 setBackground 命令测试下面的代码。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.AbstractDocument.Content;
public class View extends JFrame {
private static final long serialVersionUID = 1L;
private static final float DIM_WIDTH = 2661f;
private static final float DIM_HEIGHT = 800; //R1663f;
final Dimension SIZE = new Dimension(Math.round(DIM_WIDTH), Math.round(DIM_WIDTH));
/**
* @return the pre-determined size of the JFrame
*/
public Dimension getDimensionSize() {
return SIZE;
}
public View() {
setTitle("Warframe Alert/Invasion Tracker - Project 4");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
createPanel();
pack();
setLocation(0, 0);
setVisible(true);
}
public void createPanel() {
JTextPane textPane = new JTextPane();
Font font = new Font("Apple Casual", Font.PLAIN, 35);
textPane.setEditable(false);
// textPane.setBackground(new Color(0, 200, 255, 50));
textPane.setBackground(new Color(0, 204, 255)); // web safe
// textPane.setText(Content.getAlertText()); //Content class is a class that creates the content to show on the textPane
textPane.setText("1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n1234567890\n");
textPane.setForeground(Color.black);
textPane.setFont(font);
JScrollPane scrollPane = new JScrollPane(textPane, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPane.setBounds(50, 50, Math.round(DIM_HEIGHT * 0.8f), Math.round(DIM_HEIGHT * 0.8f));
JLabel background = new JLabel(new ImageIcon("..\\Project 4\\img\\bg.jpg"));
background.setBounds(0, 0, Math.round(DIM_WIDTH), Math.round(DIM_HEIGHT));
JLayeredPane layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(getDimensionSize());
layeredPane.add(background);
layeredPane.add(scrollPane);
this.getContentPane().add(layeredPane, BorderLayout.CENTER);
}
public static void main(String[] args) {
new View();
}
}
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