eml.studio.client.ui.tree.Leaf.java Source code

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Here is the source code for eml.studio.client.ui.tree.Leaf.java

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/**
 * Copyright 2017 Institute of Computing Technology, Chinese Academy of Sciences.
 * Licensed under the terms of the Apache 2.0 license.
 * Please see LICENSE file in the project root for terms
 */
package eml.studio.client.ui.tree;

import eml.studio.client.ui.menu.HasRightMouseUpMenu;

import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseDownHandler;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.MenuItem;
import com.google.gwt.user.client.ui.TreeItem;
import com.orange.links.client.menu.ContextMenu;

public abstract class Leaf<T> extends TreeItem implements HasRightMouseUpMenu {
    protected Label label = null;
    protected ContextMenu menu;
    private T module;

    /**
     * Create a leaf node for the Tree
     *
     * @param name   name of the TreeItem
     * @param module Attached moduleId for the TreeItem
     */
    public Leaf(String name, T module, String style) {
        // add context menu
        this.menu = new ContextMenu();
        label = new Label(name);
        this.setWidget(label);

        label.addMouseDownHandler(new MouseDownHandler() {
            @Override
            public void onMouseDown(MouseDownEvent event) {
                // display the context menu when right click
                if (event.getNativeButton() == NativeEvent.BUTTON_RIGHT) {
                    menu.setPopupPosition(event.getClientX(), event.getClientY());
                    menu.show();
                }
            }
        });

        // set moduleId
        this.module = module;
        this.addStyleName("bda-treeleaf");
        if (!style.equals(""))
            this.addStyleName(style);
    }

    public Leaf(String name, T module) {
        this(name, module, "");
    }

    /**
     * Clone a moduleId object
     */
    public T getModule() {
        return module;
    }

    @Override
    public ContextMenu getContextMenu() {
        return menu;
    }

    /**
     * Add a context menu item
     */
    @Override
    public void addMenuItem(MenuItem menuItem) {
        menu.addItem(menuItem);
    }

    /**
     * Remove this treeItem
     */
    public void delete() {
        getParentItem().removeItem(this);
    }

    @Override
    public void setText(String text) {
        label.setText(text);
    }
}