Swing组件-禁用布局大小调整 [英] Swing Component - disabling resize in layout

问题描述

我有一个基于Swing的JPanel的自定义GUI组件.该组件放置在使用BorderLayout的JFrame中.当我调整框架大小时，此组件会不断调整大小.如何避免这种情况?无论发生什么情况，我都希望组件保持相同的大小.我尝试了setSize，setPreferredSize，setMinimumSize，但没有成功.

I have a custom GUI compomemt, which is based on Swing's JPanel. This component is placed in a JFrame, that uses BorderLayout. When I resize the frame, this component keeps resizing. How can I avoid this? I would like the component to keep the same size whatever happens. I've tried setSize, setPreferredSize, setMinimumSize with no success.

提前谢谢！

M

推荐答案

您有一些选择:

• 使用LayoutManager将组件嵌套在内部面板中，该组件不调整组件的大小

• Nest the component in an inner panel with a LayoutManager that does not resize your component

使用比BorderLayout更复杂的LayoutManager.在我看来，GridBagLayout在这里会更适合您的需求.

Use a more sophisticated LayoutManager than BorderLayout. Seems to me like GridBagLayout would suit your needs better here.

第一个解决方案的示例:

import java.awt.*;
import javax.swing.*;

public class FrameTestBase extends JFrame {

    public static void main(String args[]) {
        FrameTestBase t = new FrameTestBase();

        JPanel mainPanel = new JPanel(new BorderLayout());

        // Create some component
        JLabel l = new JLabel("hello world");
        l.setOpaque(true);
        l.setBackground(Color.RED);

        JPanel extraPanel = new JPanel(new FlowLayout());
        l.setPreferredSize(new Dimension(100, 100));
        extraPanel.setBackground(Color.GREEN);

        // Instead of adding l to the mainPanel (BorderLayout),
        // add it to the extra panel
        extraPanel.add(l);

        // Now add the extra panel instead of l
        mainPanel.add(extraPanel, BorderLayout.CENTER);

        t.setContentPane(mainPanel);

        t.setDefaultCloseOperation(EXIT_ON_CLOSE);
        t.setSize(400, 200);
        t.setVisible(true);
    }
}

结果:

绿色组件放置在BorderLayout.CENTER中，红色组件保持首选大小.

Green component placed in BorderLayout.CENTER, red component maintains preferred size.

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