JMenuBarただし、最も奇妙な位置に ,を追加するのは奇妙に思えました。あなたができることですが、この行であなたが言及した困難を克服するために
Instead, this produces each portrait in the bottom third of its quadrant, and the
Action Pane taking 5/6 of the center column instead of 4/6, like I want it to.
JPanelこの場所に 1 つを追加し、この追加されたにActionPaneandを追加して、目的の結果を達成することです。そのため、これを実現する方法を示すために、この場所に追加しました。JmenuBarJPanelcenterPanel
この出力があなたが望んでいたものであることを願っています:
そして、この出力を担当するコードは次のとおりです。
import java.awt.*;
import javax.swing.*;
public class GridBagPanelLayout
{
private JPanel portrait1;
private JPanel portrait2;
private JPanel portrait3;
private JPanel portrait4;
private JPanel centerPanel;
private JPanel actionPane;
private void createAndDisplayGUI()
{
JFrame frame = new JFrame("GridBag JPanel Layout Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
/*
* This JPanel will serve as the
* Content Pane, for the JFrame.
*/
JPanel contentPane = new JPanel();
contentPane.setOpaque(true);
contentPane.setBackground(Color.WHITE);
contentPane.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.FIRST_LINE_START;
gbc.fill = GridBagConstraints.BOTH;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.33;
gbc.weighty = 0.5;
gbc.gridheight = 2;
portrait1 = new JPanel();
portrait1.setOpaque(true);
portrait1.setBackground(Color.BLUE);
portrait1.setBorder(
BorderFactory.createMatteBorder(
2, 2, 2, 2, Color.WHITE));
contentPane.add(portrait1, gbc);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weighty = 1.0;
gbc.gridheight = 4;
centerPanel = new JPanel();
centerPanel.setOpaque(true);
centerPanel.setBackground(Color.WHITE);
centerPanel.setLayout(new GridBagLayout());
GridBagConstraints constCenter = new GridBagConstraints();
constCenter.anchor = GridBagConstraints.FIRST_LINE_START;
constCenter.fill = GridBagConstraints.BOTH;
constCenter.gridx = 0;
constCenter.gridy = 0;
constCenter.weightx = 1.0;
constCenter.weighty = 0.975;
actionPane = new JPanel();
actionPane.setOpaque(true);
actionPane.setBackground(Color.MAGENTA);
actionPane.setBorder(
BorderFactory.createMatteBorder(
2, 2, 2, 2, Color.WHITE));
centerPanel.add(actionPane, constCenter);
constCenter.gridx = 0;
constCenter.gridy = 1;
constCenter.weighty = 0.025;
centerPanel.add(getMenuBar(), constCenter);
contentPane.add(centerPanel, gbc);
gbc.gridx = 2;
gbc.gridy = 0;
gbc.weighty = 0.5;
gbc.gridheight = 2;
portrait3 = new JPanel();
portrait3.setOpaque(true);
portrait3.setBackground(Color.BLUE);
portrait3.setBorder(
BorderFactory.createMatteBorder(
2, 2, 2, 2, Color.WHITE));
contentPane.add(portrait3, gbc);
gbc.gridx = 0;
gbc.gridy = 2;
//gbc.weighty = 0.5;
//gbc.gridheight = 2;
portrait2 = new JPanel();
portrait2.setOpaque(true);
portrait2.setBackground(Color.BLUE);
portrait2.setBorder(
BorderFactory.createMatteBorder(
2, 2, 2, 2, Color.WHITE));
contentPane.add(portrait2, gbc);
gbc.gridx = 2;
gbc.gridy = 2;
gbc.weighty = 0.5;
gbc.gridheight = 2;
portrait4 = new JPanel();
portrait4.setOpaque(true);
portrait4.setBackground(Color.BLUE);
portrait4.setBorder(
BorderFactory.createMatteBorder(
2, 2, 2, 2, Color.WHITE));
contentPane.add(portrait4, gbc);
frame.setContentPane(contentPane);
frame.setSize(500, 300);
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JMenuBar getMenuBar()
{
JMenuBar menuBar = new JMenuBar();
JMenu fileMenu = new JMenu("File");
fileMenu.setOpaque(true);
fileMenu.setBackground(Color.BLACK);
fileMenu.setForeground(Color.WHITE);
JMenuItem newItem = new JMenuItem("NEW");
JMenuItem openItem = new JMenuItem("OPEN");
fileMenu.add(newItem);
fileMenu.add(openItem);
JMenu editMenu = new JMenu("Edit");
editMenu.setOpaque(true);
editMenu.setBackground(Color.BLACK);
editMenu.setForeground(Color.WHITE);
JMenuItem redoItem = new JMenuItem("Redo");
JMenuItem undoItem = new JMenuItem("Undo");
editMenu.add(redoItem);
editMenu.add(undoItem);
JMenu viewMenu = new JMenu("View");
viewMenu.setOpaque(true);
viewMenu.setBackground(Color.BLACK);
viewMenu.setForeground(Color.WHITE);
JMenuItem zInItem = new JMenuItem("Zoom In");
JMenuItem zOutItem = new JMenuItem("Zoom Out");
viewMenu.add(zInItem);
viewMenu.add(zOutItem);
menuBar.add(fileMenu);
menuBar.add(editMenu);
menuBar.add(viewMenu);
menuBar.setOpaque(true);
menuBar.setBackground(Color.BLACK);
return menuBar;
}
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new GridBagPanelLayout().createAndDisplayGUI();
}
});
}
}
