我在制作JSplitPane
我喜欢的作品时遇到了一些麻烦。
首先,我希望它完全填充它的容器(一个 JFrame),而不是让它的大小由拆分窗格内的组件决定。其次,当我调整容器大小时,它不会在JScrollPane
s 或JList
s 上显示滚动条。
任何想法如何实现这一点。我确定我只需要正确连接一些听众,但我不太确定从哪里开始。
我的面板看起来像这样......
public class MainPanel extends JPanel {
public MainPanel(){
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
p1.setLayout(new BoxLayout(p1, BoxLayout.PAGE_AXIS));
p2.setLayout(new BoxLayout(p2, BoxLayout.PAGE_AXIS));
p3.setLayout(new BoxLayout(p3, BoxLayout.PAGE_AXIS));
p1.add(new SomeButtons());
p2.add(new SomeButtons());
p3.add(new SomeButtons());
p1.add(newNeedyList());
p2.add(newNeedyList());
p3.add(newNeedyList());
Dimension ms = new Dimension(0,0);
p1.setMinimumSize(ms);
p2.setMinimumSize(ms);
p3.setMinimumSize(ms);
p1.setBackground(Color.red);
p2.setBackground(Color.green);
p3.setBackground(Color.blue);
JScrollPane scp1 = new JScrollPane(p1);
JScrollPane scp2 = new JScrollPane(p2);
JScrollPane scp3 = new JScrollPane(p3);
scp1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
scp2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
scp3.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
scp1.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scp2.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scp3.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
JSplitPane sp1 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,scp2,scp3);
JSplitPane sp2 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,scp1,sp1);
sp1.setDividerLocation(0.5);
sp2.setDividerLocation(0.333333333);
sp2.setResizeWeight(0.333333333);
sp1.setResizeWeight(1.0);
this.add(sp2, BorderLayout.CENTER);
}
/** Some buttons... this part is just to fill the
panel roughly how I want it look */
private class SomeButtons extends JPanel{
public SomeButtons(){
this.setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
this.add(new JLabel("Stuff:"));
for(int i=0; i<5; i++){
final JButton btn = new JButton(" "+i+" ");
btn.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae) {
JOptionPane.showMessageDialog(btn,
"Feck off!", "You have pressed a button",
JOptionPane.WARNING_MESSAGE);
}
});
this.add(btn);
}
}
}
private JList newNeedyList(){
String[] s = new String[7];
s[0] = "Choose Me!";
for (int i=1; i<7; i++){
s[i] = "No! Choose ME!";
}
return new JList(s);
}
}
目前我有它在一个 JFrame
public class ThreePanelsTest {
public static void main(String[] args) {
JFrame frame = new JFrame();
MainPanel panel = new MainPanel();
frame.add(panel);
frame.setSize(1000,600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}