wisemapping-open-source/mindplot/src/main/javascript/commands/AddTopicCommand.js

/*
*    Copyright [2011] [wisemapping]
*
*   Licensed under WiseMapping Public License, Version 1.0 (the "License").
*   It is basically the Apache License, Version 2.0 (the "License") plus the
*   "powered by wisemapping" text requirement on every single page;
*   you may not use this file except in compliance with the License.
*   You may obtain a copy of the license at
*
*       http://www.wisemapping.org/license
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*   See the License for the specific language governing permissions and
*   limitations under the License.
*/

mindplot.commands.AddTopicCommand = mindplot.Command.extend(
{
    initialize: function(model, parentTopicId)
    {
        core.assert(model, 'Model can not be null');
        this._model = model;
        this._parentId = parentTopicId;
        this._id = mindplot.Command._nextUUID();
    },
    execute: function(commandContext)
    {
        // Add a new topic ...
        var topic = commandContext.createTopic(this._model);

        // Connect to topic ...
        if (this._parentId)
        {
            var parentTopic = commandContext.findTopics(this._parentId)[0];
            commandContext.connect(topic, parentTopic);
        }

        // Finally, focus ...
        topic.setOnFocus(true);
    },
    undoExecute: function(commandContext)
    {
        // Finally, delete the topic from the workspace ...
        var topicId = this._model.getId();
        var topic = commandContext.findTopics(topicId)[0];
        commandContext.deleteTopic(topic);
    }
});