plugin-event-manager/src/main/java/com/fr/plugin/event/manager/ui/FormEventManagerPane.java

package com.fr.plugin.event.manager.ui;

import com.fr.design.layout.FRGUIPaneFactory;
import com.fr.form.main.Form;
import com.fr.form.ui.Widget;
import com.fr.form.ui.container.WCardLayout;
import com.fr.form.ui.container.WLayout;
import com.fr.form.ui.widget.CRBoundsWidget;
import com.fr.plugin.event.manager.data.MyNode;
import com.fr.plugin.event.manager.data.MyTree;
import com.fr.plugin.event.manager.data.MyWidget;

import javax.swing.JPanel;
import java.awt.BorderLayout;

/**
 * 决策报表下的事件管理器面板
 * @author Joe
 * Created by Joe on 12/11/2020
 */
public class FormEventManagerPane extends EventManagerPane<Form> {
    // 组件树
    private MyTree tree;

    /**
     * 先调用super.initComponents()，执行initData()
     * 之后tree已经被初始化了
     *
     * @param container
     */
    @Override
    protected void initComponents(JPanel container) {
        super.initComponents(container);
        container.setLayout(FRGUIPaneFactory.createBorderLayout());
        eventConfigPane = new EventConfigPane(tree);
        container.add(eventConfigPane, BorderLayout.CENTER);
    }

    @Override
    public void initData(Form target) {
        WLayout rootContainer = target.getContainer();
        MyNode root = new MyWidget(rootContainer);
        tree = new MyTree(root);
        traversalWidget(rootContainer, tree);
        filterWidget(tree);
    }

    /**
     * 当initComponents执行完后调用
     */
    @Override
    public void complete() {
        // do nothing
    }

    /**
     * 关键算法，遍历添加节点进树
     *
     * @param widget
     * @param tree
     */
    private void traversalWidget(Widget widget, MyTree tree) {
        if (widget instanceof CRBoundsWidget) {
            traversalWidget(((CRBoundsWidget) widget).getWidget(), tree);
        } else if (widget instanceof WLayout) {
            // 容器型控件，可能存在子节点
            MyNode node = new MyWidget(widget);
            MyTree subTree = tree.addChild(node);
            if (widget instanceof WCardLayout) {
                int idx = ((WCardLayout) widget).getShowIndex();
                if (((WCardLayout) widget).getWidgetCount() > idx) {
                    traversalWidget(((WCardLayout) widget).getWidget(idx), subTree);
                }
            } else {
                for (int i = 0, count = ((WLayout) widget).getWidgetCount(); i < count; i++) {
                    traversalWidget(((WLayout) widget).getWidget(i), subTree);
                }
            }
        } else {
            // 普通widget
            MyWidget myWidget = new MyWidget(widget);
            if (widget.getListenerSize() > 0) {
                myWidget.setHasEvent(true);
            }
            tree.addChild(myWidget);
        }
    }

    /**
     * 从底向上，如果节点的控件没有事件，就把它删除
     * 保留有事件的叶子节点 和 它们的父节点
     *
     * @param tree
     */
    private void filterWidget(MyTree tree) {
        for (int i = tree.getElementsIndex().size() - 1; i >= 0; i--) {
            MyTree tempTree = tree.getElementsIndex().get(i);
            if (tempTree.isLeaf() && tempTree.getData() instanceof MyWidget) {
                if (!((MyWidget) tempTree.getData()).isHasEvent()) {
                    tree.removeChild(tempTree);
                }
            }
        }
    }

}