java 在 gridbalayout 中将 JLabel 与面板左侧对齐
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Align JLabel to the left of the panel in a gridbaglayout
提问by Kaushik Balasubramanain
I have a panel in which i have specified with a grid bag layout. I basically have 1 column and 4 rows. The labels are aligned to the center by default. How do i align them to the left?
我有一个面板，我在其中指定了网格包布局。我基本上有 1 列和 4 行。默认情况下，标签与中心对齐。我如何将它们与左侧对齐？
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);
The caller lines are:
来电线路是：
gbc=new GridBagConstraints();
gbag=new GridBagLayout();
panlel1.setLayout(gbag);
addLabel(" Exemption type", 0, 0,anchor );
采纳答案by Hovercraft Full Of Eels
try
尝试
JLabel myLabel = new JLabel("Fubar", SwingConstants.LEFT);
Or you could do the same on an already created JLabel by calling myLabel.setHorizontalAlignment(SwingConstants.LEFT);
或者您可以通过调用对已创建的 JLabel 执行相同操作 myLabel.setHorizontalAlignment(SwingConstants.LEFT);
edit: for example:
编辑：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();
}
});
}
}
回答by logicbird
Here is how I solved this. The important part is
这是我解决这个问题的方法。重要的部分是
gbc.anchor = GridBagConstraints.WEST;
The above is called right after you specify the layout cell you want and right before you add the component to the panel.
在您指定所需的布局单元格之后和将组件添加到面板之前，将立即调用上面的代码。
GridBagConstraints anchor
This field is used when the component is smaller than its display area. It determines where, within the display area, to place the component. ...
GridBagConstraints锚点
当组件小于其显示区域时使用此字段。它确定在显示区域内放置组件的位置。...
Below is basically how I implemented it.
下面基本上是我是如何实现它的。
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);
}
}
In this case I put a label below some other components, but most importantly that label is left (west) aligned within its cell.
在这种情况下，我在其他一些组件下方放置了一个标签，但最重要的是该标签在其单元格内左（西）对齐。
