swing-组件Collapse折叠面板

Collapse折叠面板

折叠面板可以用作空间上合理利用,可以随心所欲展开喜欢的内容,收起不喜欢的内容.
比如在idea编辑器中通过alt+4唤醒运行日志,再次alt+4可以隐藏.
在h5中,可以通过很简单的display属性实现,

思路

• 总面板以标题区域和内容区域组成
• 点击标题区域时隐藏内容区域,再次点击显示内容区域,重复此流程
  那么关心的核心内容就是内容区域是否是显示状态
• 隐藏内容组件同时,需要隐藏内容组件的占用空间,那么可以借助JXMultiSplitPane来处理

swing实现

代码

tips

• 需要swing 布局\内置组件\事件有一定了解
• 需要swingx有一定了解

import cn.hutool.core.util.RandomUtil;
import com.formdev.flatlaf.FlatLightLaf;
import com.mynote.core.ui.BorderBuilder;
import com.mynote.core.ui.ColorBuilder;
import com.mynote.core.util.FrameUtil;
import com.mynote.core.view.Row;
import com.mynote.example.demo.AbstractDefaultPanel;
import org.jdesktop.swingx.JXMultiSplitPane;
import org.jdesktop.swingx.MultiSplitLayout;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

/**
 * 折叠面板测试
 */
public class CollapseTest extends AbstractDefaultPanel {
    private Icon collapsedIcon;
    private Icon expandedIcon;
    private MultiSplitLayout multiSplitLayout;

    private JXMultiSplitPane collapsePanel;
    private Row title;
    private JLabel titleLabel;
    private Row content;

    @Override
    protected void init() {
        /*切割面板布局*/
        String defaultLayout = "(COLUMN " +
                "(LEAF name=title weight=0.1)" +
                "(LEAF name=content weight=0.9)" +
                ")";
        multiSplitLayout = new MultiSplitLayout(MultiSplitLayout.parseModel(defaultLayout));

        collapsedIcon = UIManager.getIcon("Tree.collapsedIcon");
        expandedIcon = UIManager.getIcon("Tree.expandedIcon");
        collapsePanel = new JXMultiSplitPane();
        collapsePanel.setLayout(multiSplitLayout);
        collapsePanel.setBackground(Color.white);
        collapsePanel.setBorder(BorderFactory.createLineBorder(ColorBuilder.LABEL_GRAY_COLOR1));
        createTitle();
        createContent();
    }

    private void createTitle() {
        title = new Row();
        titleLabel = new JLabel("collapse测试", collapsedIcon, SwingConstants.CENTER);
        title.add(titleLabel);
        collapsePanel.add(title, "title");
    }


    private void createContent() {
        content = new Row();
        String text = RandomUtil.randomString(200);
        JTextArea textArea = new JTextArea(text);
        textArea.setPreferredSize(new Dimension(400, 200));
        textArea.setEditable(false);
        textArea.setLineWrap(true);
        textArea.setBackground(Color.white);
        content.setBackground(Color.white);
        content.add(textArea);
        collapsePanel.add(content, "content");
    }

    @Override
    protected void render() {
        multiSplitLayout.displayNode("content",false);
        multiSplitLayout.layoutByWeight(title);
        view.add(collapsePanel, "center,w 400");
        super.add(view);
    }

    @Override
    protected void bindEvents() {

        title.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                boolean isShow = content.isVisible();
                multiSplitLayout.displayNode("content",!isShow);
                if (isShow) {
                    titleLabel.setIcon(collapsedIcon);
                    title.setBorder(BorderFactory.createEmptyBorder());
                } else {
                    titleLabel.setIcon(expandedIcon);
                    title.setBorder(BorderBuilder.bottomBorder(1, ColorBuilder.LABEL_GRAY_COLOR1));
                }
//                collapsePanel.revalidate();
//                collapsePanel.repaint();
                multiSplitLayout.layoutByWeight(title);
            }
        });
    }

    public static void main(String[] args) {
        FlatLightLaf.install();
        FrameUtil.launchTest(new CollapseTest());
    }
}