MyToolWindow 和 MyToolWindowFactory 只是辅助展示dialog wrapper，核心是CustomDialogWrapper

官方文档

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

Github

https://github.com/kungyutucheng/my_gradle_plugin

运行环境

macOS 10.14.5
IntelliJ idea 2019.2.4

MyToolWindow

package com.kungyu.dialog;

import com.intellij.openapi.wm.ToolWindow;

import javax.swing.*;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @author wengyongcheng
 * @since 2020/3/1 10:30 下午
 */
public class MyToolWindow  {

    private JButton hideButton;

    private JButton dialogButton;

    private JPanel myToolWindowContent;

    public MyToolWindow(ToolWindow toolWindow) {

        init();

        hideButton.addActionListener(e -> toolWindow.hide(null));
    }

    private void init() {
        dialogButton = new JButton("触发自定义dialog");
        dialogButton.addActionListener(e -> {
            if (new CustomDialogWrapper().showAndGet()) {
                // 监听弹框消失，相当于show 和 getExitCode方法的结合
                System.out.println("show and get");
            }
        });

        hideButton = new JButton("取消");

        myToolWindowContent = new JPanel();
        myToolWindowContent.add(dialogButton);
        myToolWindowContent.add(hideButton);


    }

    public JPanel getContent() {
        return myToolWindowContent;
    }

}

MyToolWindowFactory

package com.kungyu.dialog;

import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.wm.ToolWindow;
import com.intellij.openapi.wm.ToolWindowFactory;
import com.intellij.ui.content.Content;
import com.intellij.ui.content.ContentFactory;
import org.jetbrains.annotations.NotNull;


/**
 * @author wengyongcheng
 * @since 2020/3/1 10:31 下午
 */
public class MyToolWindowFactory implements ToolWindowFactory, Condition<Project> {

    /**
     * 创建 tool window
     * @param project
     * @param toolWindow
     */
    @Override
    public void createToolWindowContent(@NotNull Project project, @NotNull ToolWindow toolWindow) {
        MyToolWindow myToolWindow = new MyToolWindow(toolWindow);
        ContentFactory contentFactory = ContentFactory.SERVICE.getInstance();
        Content content = contentFactory.createContent(myToolWindow.getContent(), "自定义tool window", false);
        toolWindow.getContentManager().addContent(content);

    }


    /**
     * 控制tool window是否展示
     * @param project
     * @return
     */
    @Override
    public boolean value(Project project) {
        return true;
    }
}

plugin.xml

<extensions defaultExtensionNs="com.intellij">
    <!-- secondary:true表示设置在tool window bar最下方 -->
    <toolWindow id="customer tool window" anchor="right" factoryClass="com.kungyu.dialog.MyToolWindowFactory" secondary="true"
                    conditionClass="com.kungyu.dialog.MyToolWindowFactory"/>
</extensions>

CustomDialogWrapper

package com.kungyu.dialog;

import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.ui.ValidationInfo;
import org.apache.commons.lang.StringUtils;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

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

/**
 * @author wengyongcheng
 * @since 2020/3/2 10:36 下午
 */
public class CustomDialogWrapper extends DialogWrapper {

    private JTextField inputTextField;

    private CustomOKAction okAction;
    private DialogWrapperExitAction exitAction;

    public CustomDialogWrapper() {
        super(true);
        init();
        setTitle("自定义dialog");
    }


    /**
     * 创建视图
     * @return
     */
    @Nullable
    @Override
    protected JComponent createCenterPanel() {
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        JLabel label = new JLabel("这就是自定义dialog");
        label.setPreferredSize(new Dimension(100,100));
        panel.add(label,BorderLayout.CENTER);
        inputTextField = new JTextField();
        panel.add(inputTextField, BorderLayout.NORTH);
        return panel;

    }

    /**
     * 校验数据
     * @return 通过必须返回null，不通过返回一个 ValidationInfo 信息
     */
    @Nullable
    @Override
    protected ValidationInfo doValidate() {
        String text = inputTextField.getText();
        if(StringUtils.isNotBlank(text)) {
            return null;
        } else {
            return new ValidationInfo("校验不通过");
        }
    }

    /**
     * 覆盖默认的ok/cancel按钮
     * @return
     */
    @NotNull
    @Override
    protected Action[] createActions() {
        exitAction = new DialogWrapperExitAction("自定义cancel按钮", CANCEL_EXIT_CODE);
        okAction = new CustomOKAction();
        // 设置默认的焦点按钮
        okAction.putValue(DialogWrapper.DEFAULT_ACTION, true);
        return new Action[]{okAction,exitAction};
    }

    /**
     * 自定义 ok Action
     */
    protected class CustomOKAction extends DialogWrapperAction {

        protected CustomOKAction() {
            super("自定义ok按钮");
        }

        @Override
        protected void doAction(ActionEvent e) {
            // 点击ok的时候进行数据校验
            ValidationInfo validationInfo = doValidate();
            if (validationInfo != null) {
                Messages.showMessageDialog(validationInfo.message,"校验不通过", Messages.getInformationIcon());
            } else {
                close(CANCEL_EXIT_CODE);
            }
        }
    }
}

效果

初始样式
校验不通过

校验通过dialog消失

默认效果

初始样式 校验不通过

校验通过dialog消失