[英]JTabbedPane with GridBagLayout
我了解了JTabbedPane和GridBagLayout背后的概念。 但是,當我同時使用兩者時,我將失敗。 即,當我使用GBLayout時,其他選項卡(每個具有不同功能的選項卡)沒有顯示。 請幫忙。 謝謝。
這是我的代碼:
import java.awt.*;
import javax.swing.*;
public class Tryout extends JFrame {
private static final long serialVersionUID = 1L;
private JTabbedPane tabbedPane;
private JPanel panel1;
private JPanel breakfast;
public Tryout()
{
JPanel topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
getContentPane().add( topPanel );
createPage1(); //Tab1
createPage2(); //Tab2
tabbedPane = new JTabbedPane();
tabbedPane.addTab( "Input Form", panel1 );
tabbedPane.addTab( "Breakfast", breakfast );
topPanel.add( tabbedPane, BorderLayout.CENTER );
}
public void createPage1()
{
/* Works fine when I un-comment this
panel1 = new JPanel();
panel1.setLayout(new BorderLayout());
panel1.add(new JLabel("Hi"), BorderLayout.NORTH);
*/
//Tabs not getting displayed if I add the code below with GBLayout
JPanel panel = new JPanel(new GridBagLayout());
this.getContentPane().add(panel);
JLabel label = new JLabel("Form");
JPanel tableButtonPanel = new JPanel();
tableButtonPanel.add(new JButton("Add Thing"));
tableButtonPanel.add(new JRadioButton("Delete Thing"));
tableButtonPanel.add(new JButton("Modify Thing"));
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
panel.add(label, gbc);
gbc.gridx = 0;
gbc.gridy = 2;
panel.add(tableButtonPanel, gbc);
}
public void createPage2()
{
breakfast = new JPanel();
breakfast.setLayout( new BorderLayout() );
breakfast.add( new JButton( "North" ), BorderLayout.NORTH );
breakfast.add( new JButton( "South" ), BorderLayout.SOUTH );
breakfast.add( new JButton( "East" ), BorderLayout.EAST );
breakfast.add( new JButton( "West" ), BorderLayout.WEST );
breakfast.add( new JButton( "Center" ), BorderLayout.CENTER );
}
public static void main(String args[]) {
Tryout ex = new Tryout();
ex.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ex.setSize(750,750);
ex.setVisible(true);
ex.setTitle( "Recipe Tracker" );
ex.setBackground( Color.gray );
}
}
問題是,在createPage1
,您正在向JFrame
添加新的JPanel
:
this.getContentPane().add(panel);
這將替換位於JFrame
的BorderLayout.CENTER
位置的topPanel
(包含JTabbedPane
)。 因此,沒有JTabbedPane
出現。
您可以簡單地返回已創建的新JPanel
並將其添加到您的JTabbedPane
:
public JPanel createPage1() {
JPanel panel = new JPanel(new GridBagLayout());
// this.getContentPane().add(panel); don't do this...
...
return panel;
}
並添加:
tabbedPane.addTab("Input Form", createPage1());
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