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567 lines
14 KiB
567 lines
14 KiB
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var SelectionMixin = {
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/**
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* This function can be called from the _doInAllSectors function
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*
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* @param object
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* @param overlappingNodes
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* @private
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*/
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_getNodesOverlappingWith : function(object, overlappingNodes) {
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var nodes = this.nodes;
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for (var nodeId in nodes) {
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if (nodes.hasOwnProperty(nodeId)) {
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if (nodes[nodeId].isOverlappingWith(object)) {
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overlappingNodes.push(nodeId);
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}
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}
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}
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},
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/**
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* retrieve all nodes overlapping with given object
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* @param {Object} object An object with parameters left, top, right, bottom
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* @return {Number[]} An array with id's of the overlapping nodes
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* @private
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*/
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_getAllNodesOverlappingWith : function (object) {
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var overlappingNodes = [];
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this._doInAllActiveSectors("_getNodesOverlappingWith",object,overlappingNodes);
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return overlappingNodes;
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},
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/**
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* Return a position object in canvasspace from a single point in screenspace
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*
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* @param pointer
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* @returns {{left: number, top: number, right: number, bottom: number}}
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* @private
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*/
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_pointerToPositionObject : function(pointer) {
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var x = this._canvasToX(pointer.x);
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var y = this._canvasToY(pointer.y);
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return {left: x,
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top: y,
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right: x,
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bottom: y};
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},
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/**
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* Get the top node at the a specific point (like a click)
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*
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* @param {{x: Number, y: Number}} pointer
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* @return {Node | null} node
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* @private
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*/
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_getNodeAt : function (pointer) {
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// we first check if this is an navigation controls element
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var positionObject = this._pointerToPositionObject(pointer);
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var overlappingNodes = this._getAllNodesOverlappingWith(positionObject);
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// if there are overlapping nodes, select the last one, this is the
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// one which is drawn on top of the others
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if (overlappingNodes.length > 0) {
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return this.nodes[overlappingNodes[overlappingNodes.length - 1]];
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}
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else {
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return null;
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}
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},
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/**
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* retrieve all edges overlapping with given object, selector is around center
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* @param {Object} object An object with parameters left, top, right, bottom
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* @return {Number[]} An array with id's of the overlapping nodes
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* @private
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*/
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_getEdgesOverlappingWith : function (object, overlappingEdges) {
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var edges = this.edges;
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for (var edgeId in edges) {
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if (edges.hasOwnProperty(edgeId)) {
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if (edges[edgeId].isOverlappingWith(object)) {
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overlappingEdges.push(edgeId);
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}
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}
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}
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},
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/**
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* retrieve all nodes overlapping with given object
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* @param {Object} object An object with parameters left, top, right, bottom
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* @return {Number[]} An array with id's of the overlapping nodes
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* @private
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*/
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_getAllEdgesOverlappingWith : function (object) {
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var overlappingEdges = [];
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this._doInAllActiveSectors("_getEdgesOverlappingWith",object,overlappingEdges);
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return overlappingEdges;
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},
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/**
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* Place holder. To implement change the _getNodeAt to a _getObjectAt. Have the _getObjectAt call
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* _getNodeAt and _getEdgesAt, then priortize the selection to user preferences.
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*
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* @param pointer
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* @returns {null}
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* @private
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*/
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_getEdgeAt : function(pointer) {
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var positionObject = this._pointerToPositionObject(pointer);
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var overlappingEdges = this._getAllEdgesOverlappingWith(positionObject);
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if (overlappingEdges.length > 0) {
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return this.edges[overlappingEdges[overlappingEdges.length - 1]];
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}
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else {
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return null;
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}
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},
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/**
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* Add object to the selection array.
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*
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* @param obj
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* @private
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*/
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_addToSelection : function(obj) {
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this.selectionObj[obj.id] = obj;
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},
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/**
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* Remove a single option from selection.
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*
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* @param {Object} obj
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* @private
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*/
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_removeFromSelection : function(obj) {
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delete this.selectionObj[obj.id];
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},
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/**
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* Unselect all. The selectionObj is useful for this.
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*
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* @param {Boolean} [doNotTrigger] | ignore trigger
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* @private
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*/
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_unselectAll : function(doNotTrigger) {
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if (doNotTrigger === undefined) {
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doNotTrigger = false;
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}
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for (var objectId in this.selectionObj) {
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if (this.selectionObj.hasOwnProperty(objectId)) {
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this.selectionObj[objectId].unselect();
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}
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}
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this.selectionObj = {};
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if (doNotTrigger == false) {
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this.emit('select', this.getSelection());
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}
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},
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/**
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* Unselect all clusters. The selectionObj is useful for this.
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*
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* @param {Boolean} [doNotTrigger] | ignore trigger
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* @private
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*/
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_unselectClusters : function(doNotTrigger) {
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if (doNotTrigger === undefined) {
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doNotTrigger = false;
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}
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for (var objectId in this.selectionObj) {
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if (this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Node) {
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if (this.selectionObj[objectId].clusterSize > 1) {
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this.selectionObj[objectId].unselect();
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this._removeFromSelection(this.selectionObj[objectId]);
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}
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}
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}
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}
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if (doNotTrigger == false) {
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this.emit('select', this.getSelection());
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}
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},
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/**
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* return the number of selected nodes
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*
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* @returns {number}
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* @private
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*/
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_getSelectedNodeCount : function() {
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var count = 0;
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for (var objectId in this.selectionObj) {
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if (this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Node) {
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count += 1;
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}
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}
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}
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return count;
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},
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/**
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* return the number of selected nodes
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*
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* @returns {number}
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* @private
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*/
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_getSelectedNode : function() {
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for (var objectId in this.selectionObj) {
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if (this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Node) {
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return this.selectionObj[objectId];
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}
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}
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}
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return null;
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},
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/**
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* return the number of selected edges
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*
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* @returns {number}
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* @private
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*/
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_getSelectedEdgeCount : function() {
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var count = 0;
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for (var objectId in this.selectionObj) {
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if (this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Edge) {
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count += 1;
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}
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}
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}
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return count;
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},
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/**
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* return the number of selected objects.
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*
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* @returns {number}
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* @private
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*/
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_getSelectedObjectCount : function() {
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var count = 0;
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for (var objectId in this.selectionObj) {
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if (this.selectionObj.hasOwnProperty(objectId)) {
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count += 1;
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}
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}
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return count;
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},
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/**
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* Check if anything is selected
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*
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* @returns {boolean}
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* @private
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*/
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_selectionIsEmpty : function() {
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for(var objectId in this.selectionObj) {
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if(this.selectionObj.hasOwnProperty(objectId)) {
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return false;
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}
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}
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return true;
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},
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/**
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* check if one of the selected nodes is a cluster.
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*
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* @returns {boolean}
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* @private
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*/
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_clusterInSelection : function() {
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for(var objectId in this.selectionObj) {
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if(this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Node) {
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if (this.selectionObj[objectId].clusterSize > 1) {
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return true;
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}
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}
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}
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}
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return false;
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},
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/**
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* select the edges connected to the node that is being selected
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*
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* @param {Node} node
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* @private
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*/
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_selectConnectedEdges : function(node) {
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for (var i = 0; i < node.dynamicEdges.length; i++) {
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var edge = node.dynamicEdges[i];
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edge.select();
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this._addToSelection(edge);
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}
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},
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/**
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* unselect the edges connected to the node that is being selected
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*
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* @param {Node} node
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* @private
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*/
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_unselectConnectedEdges : function(node) {
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for (var i = 0; i < node.dynamicEdges.length; i++) {
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var edge = node.dynamicEdges[i];
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edge.unselect();
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this._removeFromSelection(edge);
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}
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},
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/**
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* This is called when someone clicks on a node. either select or deselect it.
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* If there is an existing selection and we don't want to append to it, clear the existing selection
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*
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* @param {Node || Edge} object
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* @param {Boolean} append
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* @param {Boolean} [doNotTrigger] | ignore trigger
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* @private
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*/
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_selectObject : function(object, append, doNotTrigger) {
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if (doNotTrigger === undefined) {
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doNotTrigger = false;
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}
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if (this._selectionIsEmpty() == false && append == false && this.forceAppendSelection == false) {
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this._unselectAll(true);
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}
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if (object.selected == false) {
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object.select();
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this._addToSelection(object);
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if (object instanceof Node && this.blockConnectingEdgeSelection == false) {
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this._selectConnectedEdges(object);
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}
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}
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else {
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object.unselect();
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this._removeFromSelection(object);
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}
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if (doNotTrigger == false) {
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this.emit('select', this.getSelection());
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}
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},
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/**
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* handles the selection part of the touch, only for navigation controls elements;
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* Touch is triggered before tap, also before hold. Hold triggers after a while.
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* This is the most responsive solution
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*
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* @param {Object} pointer
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* @private
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*/
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_handleTouch : function(pointer) {
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},
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/**
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* handles the selection part of the tap;
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*
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* @param {Object} pointer
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* @private
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*/
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_handleTap : function(pointer) {
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var node = this._getNodeAt(pointer);
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if (node != null) {
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this._selectObject(node,false);
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this.emit("clickNode", this.getSelection());
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}
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else {
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var edge = this._getEdgeAt(pointer);
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if (edge != null) {
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this._selectObject(edge,false);
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this.emit("clickEdge", this.getSelection());
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}
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else {
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this._unselectAll();
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}
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}
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this.emit("click", this.getSelection());
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this._redraw();
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},
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/**
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* handles the selection part of the double tap and opens a cluster if needed
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*
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* @param {Object} pointer
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* @private
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*/
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_handleDoubleTap : function(pointer) {
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var node = this._getNodeAt(pointer);
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var selection = this.getSelection();
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if (node != null && node !== undefined) {
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// we reset the areaCenter here so the opening of the node will occur
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this.areaCenter = {"x" : this._canvasToX(pointer.x),
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"y" : this._canvasToY(pointer.y)};
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this.openCluster(node);
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this.emit("doubleClickNode", selection);
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}
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else {
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if (this._getSelectedEdgeCount() == 1) {
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this.emit("doubleClickEdge", selection);
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}
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}
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this.emit("doubleClick", selection);
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},
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/**
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* Handle the onHold selection part
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*
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* @param pointer
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* @private
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*/
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_handleOnHold : function(pointer) {
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var node = this._getNodeAt(pointer);
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if (node != null) {
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this._selectObject(node,true);
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}
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else {
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var edge = this._getEdgeAt(pointer);
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if (edge != null) {
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this._selectObject(edge,true);
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}
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}
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this._redraw();
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},
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/**
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* handle the onRelease event. These functions are here for the navigation controls module.
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*
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* @private
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*/
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_handleOnRelease : function(pointer) {
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},
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/**
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*
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* retrieve the currently selected objects
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* @return {Number[] | String[]} selection An array with the ids of the
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* selected nodes.
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*/
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getSelection : function() {
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var nodeIds = this.getSelectedNodes();
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var edgeIds = this.getSelectedEdges();
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return {nodes:nodeIds, edges:edgeIds};
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},
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/**
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*
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* retrieve the currently selected nodes
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* @return {String} selection An array with the ids of the
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* selected nodes.
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*/
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getSelectedNodes : function() {
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var idArray = [];
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for(var objectId in this.selectionObj) {
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if(this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Node) {
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idArray.push(objectId);
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}
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}
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}
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return idArray
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},
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/**
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*
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* retrieve the currently selected edges
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* @return {Array} selection An array with the ids of the
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* selected nodes.
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*/
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getSelectedEdges : function() {
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var idArray = [];
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for(var objectId in this.selectionObj) {
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if(this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Edge) {
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idArray.push(objectId);
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}
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}
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}
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return idArray
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},
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/**
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* select zero or more nodes
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* @param {Number[] | String[]} selection An array with the ids of the
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* selected nodes.
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*/
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setSelection : function(selection) {
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var i, iMax, id;
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if (!selection || (selection.length == undefined))
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throw 'Selection must be an array with ids';
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// first unselect any selected node
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this._unselectAll(true);
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for (i = 0, iMax = selection.length; i < iMax; i++) {
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id = selection[i];
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var node = this.nodes[id];
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if (!node) {
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throw new RangeError('Node with id "' + id + '" not found');
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}
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this._selectObject(node,true,true);
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}
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this.redraw();
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},
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/**
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* Validate the selection: remove ids of nodes which no longer exist
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* @private
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*/
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_updateSelection : function () {
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for(var objectId in this.selectionObj) {
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if(this.selectionObj.hasOwnProperty(objectId)) {
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if (this.selectionObj[objectId] instanceof Node) {
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if (!this.nodes.hasOwnProperty(objectId)) {
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delete this.selectionObj[objectId];
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}
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}
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else { // assuming only edges and nodes are selected
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if (!this.edges.hasOwnProperty(objectId)) {
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delete this.selectionObj[objectId];
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}
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}
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}
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}
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}
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};
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