网格包布局没有显示我想要的方式 [英] Grid bag layout not displaying the way I want
问题描述
所以我有6个面板,所有面板都使用网格布局。
我用gridbaglayout将它们放在一起,这是我想要的设计
So I have 6 panels, all of them used a grid layout. And I put them together using gridbaglayout, here is the design I wanted
结果它变得一团糟
第二面板变得更加偏向右边
第三个面板在左边挤了很多,这是一场灾难。
这是格子袋布局的代码
Turn out it became a total mess The "second" panel became much further away to the right The third panel is squeezed a lot to the left and it was a disaster. Here is my code for the gridbag layout
c.gridx = 0; c.gridy = 0;
add (first,c);
c.gridx = 2; //so that the second panel starts from the center and is divided evenly with the first panel
add(second,c);
c.gridx = 0; c.gridy = 1;
add(third,c);
c.gridx = 1;
add(fourth,c);
c.gridx = 2;
add(fifth,c);
c.gridx = 3;
add(sixth,c);
感谢任何帮助。
推荐答案
当您编写 c.gridx = 0和c.gridy = 0
时,您忘记指定您想要的列数 JPanel
占据。为了指定它,你应该使用 c.gridwidth = 2
,它告诉布局这个 JPanel
需要两列空间。
As you wrote c.gridx = 0 and c.gridy = 0
, you forgot to specify how many columns you want this JPanel
to occupy. In order to specify that, you should be using c.gridwidth = 2
, which tells the layout that this JPanel
needs space for two columns.
要得到这样的输出:
这是一个小工作示例:
import java.awt.*;
import javax.swing.*;
// http://stackoverflow.com/questions/10968853/two-jpanels-in-jframe-one-under-other
public class GridBagLayoutExample
{
// http://stackoverflow.com/questions/10977017/grid-bag-layout-not-displaying-the-way-i-want
private void displayGUI()
{
JFrame frame = new JFrame("GridBagLayout Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel contentPane = new JPanel();
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.gridwidth = 2;
gbc.weightx = 0.5;
gbc.weighty = 0.2;
JPanel topLeftPanel = new JPanel();
topLeftPanel.setOpaque(true);
topLeftPanel.setBackground(Color.DARK_GRAY);
contentPane.add(topLeftPanel, gbc);
gbc.gridx = 2;
JPanel topRightPanel = new JPanel();
topRightPanel.setOpaque(true);
topRightPanel.setBackground(Color.BLUE);
contentPane.add(topRightPanel, gbc);
gbc.gridwidth = 1;
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.25;
gbc.weighty = 0.8;
JPanel firstPanel = new JPanel();
firstPanel.setOpaque(true);
firstPanel.setBackground(Color.RED);
contentPane.add(firstPanel, gbc);
gbc.gridx = 1;
JPanel secondPanel = new JPanel();
secondPanel.setOpaque(true);
secondPanel.setBackground(Color.GREEN.darker());
contentPane.add(secondPanel, gbc);
gbc.gridx = 2;
JPanel thirdPanel = new JPanel();
thirdPanel.setOpaque(true);
thirdPanel.setBackground(Color.WHITE);
contentPane.add(thirdPanel, gbc);
gbc.gridx = 3;
JPanel fourthPanel = new JPanel();
fourthPanel.setOpaque(true);
fourthPanel.setBackground(Color.MAGENTA);
contentPane.add(fourthPanel, gbc);
frame.setContentPane(contentPane);
frame.setSize(200, 300);
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new GridBagLayoutExample().displayGUI();
}
});
}
}
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