wisemapping-frontend/packages/mindplot/lib/components/NodeGraph.js

/*
 *    Copyright [2015] [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.
 */
const Topic = require('./Topic').default;
const DragTopic = require('./DragTopic').default;
const INodeModel = require('./model/INodeModel').default;

const NodeGraph = new Class(
    /** @lends NodeGraph */ {
        /**
         * @constructs
         * @param {mindplot.model.NodeModel} nodeModel
         * @param {Object<Number, String, Boolean>} options
         * @throws will throw an error if nodeModel is null or undefined
         */
        initialize: function (nodeModel, options) {
            $assert(nodeModel, 'model can not be null');

            this._options = options;
            this._mouseEvents = true;
            this.setModel(nodeModel);
            this._onFocus = false;
            this._size = { width: 50, height: 20 };
        },

        /** @return true if option is set to read-only */
        isReadOnly: function () {
            return this._options.readOnly;
        },

        /** @return model type */
        getType: function () {
            var model = this.getModel();
            return model.getType();
        },

        /**
         * @param {String} id
         * @throws will throw an error if the topic id is not a number
         */
        setId: function (id) {
            $assert(typeof topic.getId() == 'number', 'id is not a number:' + id);
            this.getModel().setId(id);
        },

        _set2DElement: function (elem2d) {
            this._elem2d = elem2d;
        },

        /**
         * @return 2D element
         * @throws will throw an error if the element is null or undefined within node graph
         */
        get2DElement: function () {
            $assert(this._elem2d, 'NodeGraph has not been initialized properly');
            return this._elem2d;
        },

        /** @abstract */
        setPosition: function (point, fireEvent) {
            throw 'Unsupported operation';
        },

        /** */
        addEvent: function (type, listener) {
            var elem = this.get2DElement();
            elem.addEvent(type, listener);
        },

        /** */
        removeEvent: function (type, listener) {
            var elem = this.get2DElement();
            elem.removeEvent(type, listener);
        },

        /** */
        fireEvent: function (type, event) {
            var elem = this.get2DElement();
            elem.trigger(type, event);
        },

        /** */
        setMouseEventsEnabled: function (isEnabled) {
            this._mouseEvents = isEnabled;
        },

        /** */
        isMouseEventsEnabled: function () {
            return this._mouseEvents;
        },

        /** @return {Object<Number>} size*/
        getSize: function () {
            return this._size;
        },

        /** @param {Object<Number>} size*/
        setSize: function (size) {
            this._size.width = parseInt(size.width);
            this._size.height = parseInt(size.height);
        },

        /**
         * @return {mindplot.model.NodeModel} the node model
         */
        getModel: function () {
            $assert(this._model, 'Model has not been initialized yet');
            return this._model;
        },

        /**
         * @param {mindplot.NodeModel} model the node model
         * @throws will throw an error if model is null or undefined
         */
        setModel: function (model) {
            $assert(model, 'Model can not be null');
            this._model = model;
        },

        /** */
        getId: function () {
            return this._model.getId();
        },

        /** */
        setOnFocus: function (focus) {
            if (this._onFocus != focus) {
                this._onFocus = focus;
                var outerShape = this.getOuterShape();
                if (focus) {
                    outerShape.setFill(Topic.OUTER_SHAPE_ATTRIBUTES_FOCUS.fillColor);
                    outerShape.setOpacity(1);
                } else {
                    outerShape.setFill(Topic.OUTER_SHAPE_ATTRIBUTES.fillColor);
                    outerShape.setOpacity(0);
                }
                this.setCursor('move');

                // In any case, always try to hide the editor ...
                this.closeEditors();

                // Fire event ...
                this.fireEvent(focus ? 'ontfocus' : 'ontblur', this);
            }
        },

        /** @return {Boolean} true if the node graph is on focus */
        isOnFocus: function () {
            return this._onFocus;
        },

        /** */
        dispose: function (workspace) {
            this.setOnFocus(false);
            workspace.removeChild(this);
        },

        /** */
        createDragNode: function (layoutManager) {
            var dragShape = this._buildDragShape();
            return new DragTopic(dragShape, this, layoutManager);
        },

        _buildDragShape: function () {
            $assert(false, '_buildDragShape must be implemented by all nodes.');
        },

        /** */
        getPosition: function () {
            var model = this.getModel();
            return model.getPosition();
        },
    }
);

/**
 * creates a new topic from the given node model
 * @memberof mindplot.Nodegraph
 * @param {mindplot.model.NodeModel} nodeModel
 * @param {Object} options
 * @throws will throw an error if nodeModel is null or undefined
 * @throws will throw an error if the nodeModel's type is null or undefined
 * @throws will throw an error if the node type cannot be recognized as either central or main
 * topic type
 * @return {mindplot.CentralTopic|mindplot.MainTopic} the new topic
 */
NodeGraph.create = function (nodeModel, options) {
    const CentralTopic = require('./CentralTopic').default;
    const MainTopic = require('./MainTopic').default;
    $assert(nodeModel, 'Model can not be null');

    var type = nodeModel.getType();
    $assert(type, 'Node model type can not be null');

    var result;
    if (type == INodeModel.CENTRAL_TOPIC_TYPE) {
        result = new CentralTopic(nodeModel, options);
    } else if (type == INodeModel.MAIN_TOPIC_TYPE) {
        result = new MainTopic(nodeModel, options);
    } else {
        $assert(false, 'unsupported node type:' + type);
    }

    return result;
};

export default NodeGraph;