问题描述
我正在对演示Swing GUI进行一些测试.在此演示中，JFrame由3个"master" JPanel组成.如果愿意，第一个(jp1)由JLabel组成，其他两个由其他几个JPanel组成.我正在使用MigLayout.
I am doing a little test of a demo Swing GUI. In this demo, the JFrame is composed of 3 "master" JPanels. If you will, the first (jp1) is composed of JLabels, and the other two are composed of several other JPanels. I am using MigLayout.
这是我的示例代码:
// All the jPanels
JFrame frame = new JFrame();
frame.setLayout(new MigLayout());
JPanel jp1 = new JPanel();
jp1.setLayout(new MigLayout());
jp1.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel jp2 = new JPanel();
jp2.setLayout(new MigLayout());
jp2.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel jp3 = new JPanel();
jp3.setLayout(new MigLayout());
jp3.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel jp4 = new JPanel();
jp4.setLayout(new MigLayout());
jp4.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel jp5 = new JPanel();
jp5.setLayout(new MigLayout());
jp5.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel jp6 = new JPanel();
jp6.setLayout(new MigLayout());
jp6.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel jp7 = new JPanel();
jp7.setLayout(new MigLayout());
jp7.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel bigPanel1 = new JPanel();
bigPanel1.setLayout(new MigLayout());
bigPanel1.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
JPanel bigPanel2 = new JPanel();
bigPanel2.setLayout(new MigLayout());
bigPanel2.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
//All the labels to be added to JPanel jp1
JLabel label1 = new JLabel();
label1.setText("LABEL1");
JLabel label2 = new JLabel();
label2.setText("LABEL2");
JLabel label3 = new JLabel();
label3.setText("LABEL3");
JLabel label4 = new JLabel();
label4.setText("LABEL4");
jp1.add(label1);
jp1.add(label2);
jp1.add(label3);
jp1.add(label4,"wrap");
bigPanel1.add(jp2);
bigPanel1.add(jp6);
bigPanel1.add(jp3,"grow,wrap");
bigPanel2.add(jp4);
bigPanel2.add(jp7);
bigPanel2.add(jp5,"grow,wrap");
frame.getContentPane().add(jp1,"dock north, wrap");
frame.getContentPane().add(bigPanel1,"span,grow,wrap");
frame.getContentPane().add(bigPanel2,"span,grow,wrap");
frame.pack();
frame.setVisible(true);
输出结果如下: GUI输出
我想要实现的是能够在第一个JPanel(jp1)中添加标签，而不会弄乱其余JPanel的宽度.另外，我想在bigPanel中使几个JPanel占据其全部宽度，并在jp2，jp6和jp3中占据其全部宽度.
What I want to achieve is being able to add labels into the 1st JPanel (jp1) without messing with the remainder JPanels width.Additionally, I want to make the several JPanels inside a bigPanel to occupy its full width, as well as in jp2,jp6 and jp3 to fill bigPanel1.
我应该怎么做?预先感谢.
How should I do this? Thanks in advance.
推荐答案
我从没使用过MigLayout，而且我个人不知道是否可以使用默认Java LayoutManager完成此操作.
I have never used MigLayout, and personally dont see the reason if it can be done using default java LayoutManager.
好的，所以我使用了FlowLayout和 GridBagLayout的组合以及gc.fill=GridBagConstraints.NONE和gc.anchor=GridBagConstraints.WEST用于那些我们不想填充 contentpane 宽度的面板，也根据您的注释进行了更新，以停止JPanel/当添加更多JLabel时，JFrame变得大于给定的最大宽度，这是使用JScrollPane:
Okay so I used a combination FlowLayout and GridBagLayout to achieve this, along with gc.fill=GridBagConstraints.NONE and gc.anchor=GridBagConstraints.WEST for those panels which we dont want to fill the contentpane width, also updated as per your comment to stop the JPanel/JFrame from growing larger than the given max width when more JLabels are added this was done using a JScrollPane:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;
public class Test {
public Test() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setLayout(new GridBagLayout());
final JPanel labelPanel = new JPanel();
labelPanel.setBorder(new LineBorder(Color.black));
for (int i = 0; i < 5; i++) {
labelPanel.add(new JLabel("Label" + (i + 1)));
}
final int maxWidth = 200;
final JScrollPane jsp = new JScrollPane(labelPanel) {
@Override
public Dimension getPreferredSize() {
//we set the height by checking if we exceeed the wanted ith thus a scrollbar will appear an we must incoprate that or labels wont be shpwn nicely
return new Dimension(maxWidth, labelPanel.getPreferredSize().width < maxWidth ? (labelPanel.getPreferredSize().height + 5) : ((labelPanel.getPreferredSize().height + getHorizontalScrollBar().getPreferredSize().height) + 5));
}
};
JPanel otherPanel = new JPanel();
otherPanel.add(new JLabel("label"));
otherPanel.setBorder(new LineBorder(Color.black));
JPanel otherPanel2 = new JPanel();
otherPanel2.add(new JLabel("label 1"));
otherPanel2.add(new JLabel("label 2"));
otherPanel2.setBorder(new LineBorder(Color.black));
GridBagConstraints gc = new GridBagConstraints();
gc.fill = GridBagConstraints.BOTH;
gc.weightx = 1.0;
gc.weighty = 1.0;
gc.gridx = 0;
gc.gridy = 0;
frame.add(jsp, gc);
gc.fill = GridBagConstraints.NONE;
gc.anchor = GridBagConstraints.WEST;
gc.gridy = 1;
frame.add(otherPanel, gc);
gc.anchor = GridBagConstraints.WEST;
gc.gridy = 2;
frame.add(otherPanel2, gc);
frame.pack();
frame.setVisible(true);
frame.revalidate();
frame.repaint();
}
public static void main(String[] args) {
//Create Swing components on EDT
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new Test();
}
});
}
}
这篇关于如何调整JPanel的大小以适合"docknorth"中的JFrame.不会干扰其余的JPanel的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！