我的问题是如何将我的 3 个 JPanel 扩展到我的 GrigBadLayout 中。 我添加了 2 张照片,第一张样本并显示结果,第二张是我想要的。
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JPanel;
public class ListMembersView extends JPanel{
JPanel headerPanel;
JPanel containerPanel;
JPanel footerPanel;
public ListMembersView(){
initComponents();
initLayout();
}
private void initComponents(){
this.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(255, 255, 255),5));
headerPanel = new JPanel();
headerPanel.setBackground(Color.red);
containerPanel = new JPanel();
containerPanel.setBackground(Color.yellow);
footerPanel = new JPanel();
footerPanel.setBackground(Color.blue);
}
private void initLayout(){
this.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
/*Not expand JPanel?*/
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx=0; c.gridy=0;
this.add(headerPanel,c);
c.gridx=0; c.gridy=1;
c.gridwidth = 3;
this.add(containerPanel,c);
c.gridx=0; c.gridy=2;
this.add(footerPanel,c);
}
}
我的结果是:
我愿意这样:
最佳答案
您需要将 columnWeights = {1}
和 rowWeights = {1, 1,1}
和 fill
都设置为:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ListMembersView extends JPanel{
JPanel headerPanel;
JPanel containerPanel;
JPanel footerPanel;
public ListMembersView(){
initComponents();
initLayout();
}
private void initComponents(){
this.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(255, 255, 255),5));
headerPanel = new JPanel();
headerPanel.setBackground(Color.red);
containerPanel = new JPanel();
containerPanel.setBackground(Color.yellow);
footerPanel = new JPanel();
footerPanel.setBackground(Color.blue);
}
private void initLayout(){
GridBagLayout gridBagLayout = new GridBagLayout();
this.setLayout(gridBagLayout);
gridBagLayout.columnWeights = new double[] {1};
gridBagLayout.rowWeights = new double[] {1, 1, 1};
GridBagConstraints c = new GridBagConstraints();
/*Not expand JPanel?*/
c.fill = GridBagConstraints.BOTH;
c.gridx=0; c.gridy=0;
this.add(headerPanel,c);
c.gridx=0; c.gridy=1;
c.gridwidth = 3;
this.add(containerPanel,c);
c.gridx=0; c.gridy=2;
this.add(footerPanel,c);
}
public static void main(String[] args) {
JFrame frame = new JFrame("test");
frame.setLayout(new BorderLayout());
frame.add(new ListMembersView());
frame.setSize(500, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
fill=BOTH
teels,面板应该在两个方向上延伸。
weights
说明如何根据权重的总和按比例划分行或列之间的空间。
关于java - 如何将 Jpanels 展开成 GridBagLayout,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40128569/