我想创建一个布局:2行,1列。第一排应占据窗户高度的70%,第二排应占窗户的30%。我使用weighty
GridBagConstraints
属性来实现此目的。
但是我的组件宽度有问题,因为当我调整应用程序窗口的大小时,组件保持在中心,其宽度是恒定的,我在组件的左侧和右侧得到一个空格(即使我设置了fill
到BOTH
)。当我更改窗口的高度(组件调整得非常好并填充窗口的完整高度)时,不会发生此问题。
低于我的约束:
firstConstraints.gridx = 0;
firstConstraints.gridy = 0;
firstConstraints.weighty = 0.7;
firstConstraints.fill = GridBagConstraints.BOTH;
secondConstraints.gridx = 0;
secondConstraints.gridy = 1;
secondConstraints.weighty = 0.3;
secondConstraints.fill = GridBagConstraints.BOTH;
答案 0 :(得分:5)
答案 1 :(得分:1)
简单的例子
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
public class BorderPanels extends JFrame {
private static final long serialVersionUID = 1L;
public BorderPanels() {
getContentPane().setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
JPanel panel1 = new JPanel();
Border eBorder = BorderFactory.createEtchedBorder();
panel1.setBorder(BorderFactory.createTitledBorder(eBorder, "70pct"));
gbc.gridx = gbc.gridy = 0;
gbc.gridwidth = gbc.gridheight = 1;
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.weightx = gbc.weighty = 70;
getContentPane().add(panel1, gbc);
JPanel panel2 = new JPanel();
panel2.setBorder(BorderFactory.createTitledBorder(eBorder, "30pct"));
gbc.gridy = 1;
gbc.weightx = 30;
gbc.weighty = 30;
gbc.insets = new Insets(2, 2, 2, 2);
getContentPane().add(panel2, gbc);
pack();
}
public static void main(String[] args) {
new BorderPanels().setVisible(true);
}
}