我有一个包含JPanel的JFrame,该JPanel包含一个JList组件。
然后我有另一个JPanel用于我的paintComponent()
,它也返回一个尺寸。
但是当我为该尺寸设置大小时,它会尝试重新定位我的另一个JPanel。
这是我的paintComponent()
代码:
class drawOnPanel extends JPanel {
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.setColor(Color.BLUE);
}
@Override
public Dimension getPreferredSize(){
return new Dimension(250, 250);
}
}
接下来我有一个JFrame,调用了drawOnPanel类:
public static void mainFrame() {
JFrame f = new MTGSAMPServerReference();
f.setTitle("MTG SAMP Server Reference Guide");
f.pack();
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new drawOnPanel());
f.setSize(330, 300);
f.setLocationRelativeTo(null);
}
然后我有一个位于JPanel上的JList:
public void MainMenu() {
JPanel controls = new JPanel(new BorderLayout(5,5));
final CardLayout cl = new CardLayout();
final JPanel panel = new JPanel(cl);
controls.add(panel);
this.getContentPane().setLayout(new FlowLayout(FlowLayout.LEADING));
list = new JList<Object>(mainMenu);
list.setVisibleRowCount(7);
select = new JButton("Select");
exit = new JButton("Exit");
select.addActionListener(this);
exit.addActionListener(this);
controls.add(new JScrollPane(list));
JPanel basePanel = new JPanel(new GridLayout(0, 1));
basePanel.add(select);
basePanel.add(exit);
controls.add(basePanel, BorderLayout.PAGE_END);
add(controls);
refreshFrame();
}
当我尝试在我的
paintComponent()
JPanel上绘图时,它的确会绘制,但是我指定的坐标没有被正确绘制。有人知道这是为什么吗?提前感谢!编辑:这里是我的程序的一些截图。
这个是我不包含
drawOnPanel
的程序样子:
而这个是我包含drawOnPanel
的程序样子:
我只希望它在JList的右侧绘制,而不移动JList。正如你所看到的,它会调整其他JPanel。非常感谢任何形式的帮助!
编辑:这是我的SSCCE。
编辑:这是我的SSCCE代码:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public final class SSCCE1 extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
JList list;
JButton select;
JButton exit;
Object[]mainMenu = {"Value 1", "Value 2", "Value 3", "Value 4"};
public SSCCE1() {
MainMenu();
}
public void MainMenu() {
JPanel controls = new JPanel(new BorderLayout(5,5));
final CardLayout cl = new CardLayout();
final JPanel panel = new JPanel(cl);
controls.add(panel);
this.getContentPane().setLayout(new FlowLayout(FlowLayout.LEADING));
list = new JList<Object>(mainMenu);
list.setVisibleRowCount(7);
select = new JButton("Select");
exit = new JButton("Exit");
controls.add(new JScrollPane(list));
JPanel basePanel = new JPanel(new GridLayout(0, 1));
basePanel.add(select);
basePanel.add(exit);
controls.add(basePanel, BorderLayout.PAGE_END);
add(controls);
revalidate();
repaint();
SSCCE1.this.repaint();
}
public void createAndShowGUI() {
mainFrame();
SSCCE1.this.repaint();
}
public static void mainFrame() {
JFrame f = new SSCCE1();
f.setTitle("My SSCCE");
f.pack();
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new drawOnPanel()); // When this is uncommented, it messes with the other JPanel, but when commented, it works fine, but does not allow drawing on the other JFrame.
f.setExtendedState(JFrame.MAXIMIZED_BOTH);
f.setLocationRelativeTo(null);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
SSCCE1 gui = new SSCCE1();
gui.createAndShowGUI();
}
});
}
@Override
public void actionPerformed(ActionEvent ae) {
}
}
class drawOnPanel extends JPanel {
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.setColor(Color.BLUE);
}
@Override
public Dimension getPreferredSize(){
return new Dimension(250, 250);
}
}