com.google.appinventor.client.explorer.project.ProjectNodeContextMenu.java Source code

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Here is the source code for com.google.appinventor.client.explorer.project.ProjectNodeContextMenu.java

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// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2012 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0

package com.google.appinventor.client.explorer.project;

import com.google.appinventor.client.Ode;
import com.google.appinventor.client.explorer.commands.CommandRegistry;
import com.google.appinventor.client.explorer.commands.ProjectNodeCommand;
import com.google.appinventor.client.widgets.ContextMenu;
import com.google.appinventor.shared.rpc.project.ProjectNode;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.Widget;

import java.util.List;

/**
 * A context menu for a project node.
 *
 */
public final class ProjectNodeContextMenu {

    private ProjectNodeContextMenu() {
    }

    /**
     * Shows a context menu for a node.
     *
     * @param node  node for which to show the context menu
     * @param host  widget to anchor context menu to
     */
    public static void show(final ProjectNode node, Widget host) {

        List<CommandRegistry.Entry> entries = Ode.getCommandRegistry().get(node);
        if (entries.isEmpty()) {
            return;
        }

        final ContextMenu menu = new ContextMenu();
        // Position the context menu to the East of the host widget.
        menu.setPopupPosition(host.getAbsoluteLeft() + host.getOffsetWidth(), host.getAbsoluteTop());
        for (final CommandRegistry.Entry entry : entries) {
            final ProjectNodeCommand cmd = entry.getCommand();

            // Create the menu item.
            menu.addItem(cmd.getLabel(), new Command() {
                @Override
                public void execute() {
                    menu.hide();
                    cmd.execute(node);
                }
            });
        }

        menu.show();
    }
}