官方文档

https://www.jetbrains.org/intellij/sdk/docs/user_interface_components/misc_swing_components.html

Github

https://github.com/kungyutucheng/my_gradle_plugin

运行环境

macOS 10.14.5
IntelliJ idea 2019.2.4

效果

初始效果 拖动效果（proportion设置为0.3F）

Demo

JBSplitterAction

package com.kungyu.jbsplitter;

import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import org.jetbrains.annotations.NotNull;

/**
 * @author wengyongcheng
 * @since 2020/3/8 2:39 下午
 */
public class JBSplitterAction extends AnAction {
    @Override
    public void actionPerformed(@NotNull AnActionEvent e) {
        new JBSplitterDialogWrapper().showAndGet();
    }
}

注册Action

<action id="com.kungyu.jbsplitter.JBSplitterAction" class="com.kungyu.jbsplitter.JBSplitterAction"
                text="JBSplitterAction" description="JBSplitterAction">
    <add-to-group group-id="ToolsMenu" anchor="after" relative-to-action="com.kungyu.tree.TreeAction"/>
</action>

JBSplitterDialogWrapper

package com.kungyu.jbsplitter;

import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.openapi.wm.ToolWindow;
import com.intellij.ui.JBSplitter;
import javafx.scene.layout.BorderPane;
import org.jetbrains.annotations.Nullable;

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

/**
 * @author wengyongcheng
 * @since 2020/3/8 2:40 下午
 */
public class JBSplitterDialogWrapper extends DialogWrapper {

    private JBSplitter splitter;

    public JBSplitterDialogWrapper() {
        super(true);
        init();
        setTitle("JBSplitter");
    }

    @Nullable
    @Override
    protected JComponent createCenterPanel() {
        splitter = new JBSplitter();
        JPanel firstPanel = new JPanel();
        firstPanel.add(new JLabel("First Panel"));
        firstPanel.setBorder(BorderFactory.createTitledBorder("First Panel"));
        splitter.setFirstComponent(firstPanel);

        JPanel secondPanel = new JPanel();
        secondPanel.add(new JLabel("Second Panel"));
        secondPanel.setBorder(BorderFactory.createTitledBorder("Second Panel"));
        splitter.setSecondComponent(secondPanel);

        // 记录当前俩个组件的比例，存放到map中，key即为该值
        splitter.setSplitterProportionKey("customProportionKey");
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.add(splitter, BorderLayout.CENTER);
        return panel;
    }
}