[英]Align JLabel to the left of the panel in a gridbaglayout
我有一個面板,其中指定了網格袋布局。 我基本上有1列和4行。 默認情況下,標簽與中心對齊。 如何將它們向左對齊?
private void addLabel(String name, int gridx, int gridy, int anchor ){
gbc.gridx=gridx;
gbc.gridy=gridy;
JLabel label=new JLabel(name);
gbc.fill=GridBagConstraints.HORIZONTAL;
gbag.setConstraints(label, gbc);
panel1.add(label);
呼叫者行是:
gbc=new GridBagConstraints();
gbag=new GridBagLayout();
panlel1.setLayout(gbag);
addLabel(" Exemption type", 0, 0,anchor );
嘗試
JLabel myLabel = new JLabel("Fubar", SwingConstants.LEFT);
或者,您可以通過調用myLabel.setHorizontalAlignment(SwingConstants.LEFT);
在已創建的JLabel上執行相同操作myLabel.setHorizontalAlignment(SwingConstants.LEFT);
編輯:例如:
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.*;
public class GridBagExample {
private static void createAndShowUI() {
String[] data = {"one", "two", "three", "four"};
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 1;
gbc.gridheight = 1;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.BOTH;
gbc.weightx = 1.0; // **** comment this line out to see effect ****
gbc.weighty = 1.0; // **** comment this line out to see effect ****
for (int i = 0; i < data.length; i++) {
JLabel label = new JLabel(data[i]);
gbc.gridy = i;
panel.add(label, gbc);
}
JFrame frame = new JFrame("GridBagExample");
frame.getContentPane().add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}
這是我解決此問題的方法。 重要的是
gbc.anchor = GridBagConstraints.WEST;
在您指定所需的布局單元之后,以及在將組件添加到面板之前,即會調用上述方法。
GridBagConstraints 錨點
當組件小於其顯示區域時,將使用此字段。 它確定在顯示區域中放置組件的位置。 ...
下面基本上是我的實現方式。
public class ControlPanel extends JPanel{...
ControlPanel(){
this.setLayout(new GridBagLayout());
//create components
...
GridBagConstraints gbc = new GridBagConstraints();
//space components out a little
gbc.insets = new Insets(5,5,5,5);
gbc.gridx = 0;
gbc.gridy = 0;
this.add(button_btn,gbc);
gbc.gridx = 1;
gbc.gridy = 0;
this.add(spinner1_pnl,gbc);
gbc.gridx = 2;
gbc.gridy = 0;
this.add(spinner2_pnl,gbc);
gbc.gridx = 3;
gbc.gridy = 0;
this.add(checkbox1_chk,gbc);
gbc.gridx = 4;
gbc.gridy = 0;
this.add(checkbox2_chk,gbc);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridwidth = 3; //span 3 columns
gbc.anchor = GridBagConstraints.WEST;
this.add(results_lbl,gbc);
}
}
在這種情況下,我在其他一些組件下方放置了一個標簽,但最重要的是,該標簽在其單元格內保持(西向)對齊。
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