[英]Debugging GridBagLayout - components clumped to center
我正在嘗試獲得以下布局
標簽.................. NumericField
Label2 ................ NumericField
Label3333 .......... NumericField
基本上(。)點將是空白。 我試過了GridBagLayout,將標簽的網格寬度設置為5,將NumericField的網格寬度設置為1。我在下面發布代碼。 但是我看不到期望的結果,我看到所有組件都在中心對齊,而不是標簽在左邊界和NF在右邊界。
對於標簽:
GridBagConstraints localC = new GridBagConstraints();
localC.anchor = GridBagConstraints.FIRST_LINE_START;
//localC.fill = GridBagConstraints.HORIZONTAL;
localC.weightx = 1.0;
localC.weighty = 1.0;
localC.gridx = 0;
localC.gridy = 0;
localC.gridheight = 1;
localC.gridwidth = 5;
localC.insets = new Insets(0, 0, 0, 0);
對於NumericFields
localC.anchor = GridBagConstraints.RELATIVE;
localC.weightx = 0.5;
localC.weighty = 0.5;
localC.gridx = 1;
localC.gridy = 0;
localC.gridheight = 1;
localC.gridwidth = 1;
我是JAVA的新手,通常都在布局上苦苦掙扎。
一個值添加到Insets
right
屬性,這將是像素數的增加立柱的右側。 您還可以使用GridBagConstraints#anchor
設置為GridBagConstraints.WEST
,這將強制將列中的組件放置在“列”的左側,這樣可以確保當列中的組件較寬時,它們不會不能放置在結果空間的中間。
gridwidth
確定給定單元格如何跨多列,但是如果結果列中沒有其他組件,則將其丟棄(默認為0
),因此在您的布局中沒有意義。
請參閱如何使用GridBagLayout詳細信息
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.WEST;
gbc.insets = new Insets(0, 0, 0, 12);
add(new JLabel("Label"), gbc);
gbc.gridy++;
add(new JLabel("Label2"), gbc);
gbc.gridy++;
add(new JLabel("Label3333"), gbc);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.insets = new Insets(0, 0, 0, 0);
add(new JTextField(10), gbc);
gbc.gridy++;
add(new JTextField(10), gbc);
gbc.gridy++;
add(new JTextField(10), gbc);
}
}
}
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