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- /*
- * jsPlumb 1.1.1-RC1
- *
- * Provides a way to visually connect elements on an HTML page.
- *
- * 1.1.1 contains bugfixes and API additions on 1.1.0.
- *
- *
- * http://morrisonpitt.com/jsPlumb/demo.html
- * http://code.google.com/p/jsPlumb
- *
- */
- (function() {
-
- var ie = (/MSIE/.test(navigator.userAgent) && !window.opera);
-
- var log = null;
-
- var repaintFunction = function() { jsPlumb.repaintEverything(); };
- var automaticRepaint = true;
- function repaintEverything() {
- if (automaticRepaint)
- repaintFunction();
- };
- var resizeTimer = null;
-
- /*TODO: abstract this out from jQuery too! but how...because jsPlumb is not loaded yet.
- $(window).bind('resize', function() {
- if (resizeTimer) clearTimeout(resizeTimer);
- resizeTimer = setTimeout(repaintEverything, 100);
- });*/
-
- /**
- * map of element id -> endpoint lists. an element can have an arbitrary number of endpoints on it,
- * and not all of them have to be connected to anything.
- */
- var endpointsByElement = {};
- var offsets = [];
- var floatingConnections = {};
- var draggableStates = {};
- var _draggableByDefault = true;
- var sizes = [];
-
- var DEFAULT_NEW_CANVAS_SIZE = 1200; // only used for IE; a canvas needs a size before the init call to excanvas (for some reason. no idea why.)
-
- var _findIndex = function( a, v, b, s ) {
-
- var _eq = function(o1, o2) {
- if (o1 === o2) return true;
- else if (typeof o1 == 'object' && typeof o2 == 'object') {
- var same = true;
- for(var propertyName in o1) {
- if(!_eq(o1[propertyName], o2[propertyName])) {
- same = false;
- break;
- }
- }
- for(var propertyName in o2) {
- if(!_eq(o2[propertyName], o1[propertyName])) {
- same = false;
- break;
- }
- }
- return same;
- }
- };
-
- for( var i = +b || 0, l = a.length; i < l; i++ ) {
- if( _eq(a[i], v)) return i;
- }
- return -1;
- };
-
- /**
- * helper method to add an item to a list, creating the list if it does not yet exist.
- */
- var _addToList = function(map, key, value) {
- var l = map[key];
- if (l == null) {
- l = [];
- map[key] = l;
- }
- l.push(value);
- };
-
- /**
- * Handles the dragging of an element.
- * @param element jQuery element
- * @param ui UI object from current library's event system
- */
- var _draw = function(element, ui) {
- var id = _getAttribute(element, "id");
- var endpoints = endpointsByElement[id];
- if (endpoints) {
- _updateOffset(id, ui);
- var myOffset = offsets[id];
- var myWH = sizes[id];
- // loop through endpoints for this element
- for (var i = 0; i < endpoints.length; i++) {
- var e = endpoints[i];
- var anchorLoc = endpoints[i].anchor.compute([myOffset.left, myOffset.top], myWH);
- e.paint(anchorLoc);
- var l = e.connections;
- for (var j = 0; j < l.length; j++)
- l[j].paint(id, ui); // ...and paint them.
- }
- }
- };
-
- /**
- * helper function: the second argument is a function taking two args - the first is a
- * jquery element, and the second is the element's id.
- *
- * the first argument may be one of three things:
- *
- * 1. a string, in the form "window1", for example. an element's id. if your id starts with a
- * hash then jsPlumb does not append its own hash too...
- * 2. a jquery element, already resolved using $(...).
- * 3. a list of strings/jquery elements.
- */
- var _elementProxy = function(element, fn) {
- var retVal = null;
- if (typeof element == 'object' && element.length) {
- retVal = [];
- for (var i = 0; i < element.length; i++) {
- var el = _getElementObject(element[i]);
- var id = _getAttribute(el, "id");
- retVal.push(fn(el, id)); // append return values to what we will return
- }
- }
- else {
- var el = _getElementObject(element);
- var id = _getAttribute(el, "id");
- retVal = fn(el, id);
- }
-
- return retVal;
- };
-
- /**
- * gets the named attribute from the given element (id or element object)
- */
- var _getAttribute = function(el, attName) {
- var ele = jsPlumb.CurrentLibrary.getElementObject(el);
- return jsPlumb.CurrentLibrary.getAttribute(ele, attName);
- };
-
- var _setAttribute = function(el, attName, attValue) {
- var ele = jsPlumb.CurrentLibrary.getElementObject(el);
- jsPlumb.CurrentLibrary.setAttribute(ele, attName, attValue);
- };
-
- var _addClass = function(el, clazz) {
- var ele = jsPlumb.CurrentLibrary.getElementObject(el);
- jsPlumb.CurrentLibrary.addClass(ele, clazz);
- };
-
- var _getElementObject = function(elId) {
- return jsPlumb.CurrentLibrary.getElementObject(elId);
- };
-
- var _getOffset = function(el) {
- var ele = jsPlumb.CurrentLibrary.getElementObject(el);
- return jsPlumb.CurrentLibrary.getOffset(ele);
- };
-
- var _getSize = function(el) {
- var ele = jsPlumb.CurrentLibrary.getElementObject(el);
- return jsPlumb.CurrentLibrary.getSize(ele);
- };
-
- var _initDraggable = function(el, options) {
- return jsPlumb.CurrentLibrary.initDraggable(el, options);
- };
-
- var _isDragSupported = function(el) {
- return jsPlumb.CurrentLibrary.isDragSupported(el);
- };
-
- var _initDroppable = function(el, options) {
- return jsPlumb.CurrentLibrary.initDroppable(el, options);
- };
-
- var _isDropSupported = function(el) {
- return jsPlumb.CurrentLibrary.isDropSupported(el);
- };
-
- var _animate= function(el, properties, options) {
- return jsPlumb.CurrentLibrary.animate(el, properties, options);
- };
-
- var _appendCanvas = function(canvas) {
- document.body.appendChild(canvas);
- };
-
- /**
- * gets an id for the given element, creating and setting one if necessary.
- */
- var _getId = function(element) {
- var id = _getAttribute(element, "id");
- if (!id) {
- id = "_jsPlumb_" + new String((new Date()).getTime());
- _setAttribute(element, "id", id);
- }
- return id;
- };
-
- /**
- * inits a draggable if it's not already initialised.
- * todo: if the element was draggable already, like from some non-jsPlumb call, wrap the drag function.
- */
- var _initDraggableIfNecessary = function(element, elementId, isDraggable, dragOptions) {
- // dragging
- var draggable = isDraggable == null ? _draggableByDefault : isDraggable;
- if (draggable && _isDragSupported(element)) {
- var options = dragOptions || jsPlumb.Defaults.DragOptions;
- options = jsPlumb.extend({}, options); // make a copy.
- var dragEvent = jsPlumb.CurrentLibrary.dragEvents['drag'];
- var initDrag = function(element, elementId, dragFunc) {
- options[dragEvent] = _wrap(options[dragEvent], dragFunc);
- var draggable = draggableStates[elementId];
- options.disabled = draggable == null ? false : !draggable;
- _initDraggable(element, options);
- };
- initDrag(element, elementId, function() {
- var ui = jsPlumb.CurrentLibrary.getUIPosition(arguments);
- _draw(element, ui);
- _addClass(element, "jsPlumb_dragged");
- });
- }
- };
-
- var _log = function(msg) {
- // not implemented. yet.
- }
-
- /**
- * helper to create a canvas.
- * @param clazz optional class name for the canvas.
- */
- var _newCanvas = function(clazz) {
- var canvas = document.createElement("canvas");
- _appendCanvas(canvas);
- canvas.style.position="absolute";
- if (clazz) { canvas.className=clazz; }
- _getId(canvas); // set an id.
-
- if (ie) {
- // for IE we have to set a big canvas size. actually you can override this, too, if 1200 pixels
- // is not big enough for the biggest connector/endpoint canvas you have at startup.
- jsPlumb.sizeCanvas(canvas, 0, 0, DEFAULT_NEW_CANVAS_SIZE, DEFAULT_NEW_CANVAS_SIZE);
- canvas = G_vmlCanvasManager.initElement(canvas);
- }
-
- return canvas;
- };
- /**
- * performs the given function operation on all the connections found for the given element
- * id; this means we find all the endpoints for the given element, and then for each endpoint
- * find the connectors connected to it. then we pass each connection in to the given
- * function.
- */
- var _operation = function(elId, func) {
- var endpoints = endpointsByElement[elId];
- if (endpoints && endpoints.length) {
- for (var i = 0; i < endpoints.length; i++) {
- for (var j = 0; j < endpoints[i].connections.length; j++) {
- var retVal = func(endpoints[i].connections[j]);
- // if the function passed in returns true, we exit.
- // most functions return false.
- if (retVal) return;
- }
- }
- }
- };
- /**
- * perform an operation on all elements.
- */
- var _operationOnAll = function(func) {
- for (var elId in endpointsByElement) {
- _operation(elId, func);
- }
- };
- /**
- * helper to remove an element from the DOM.
- */
- var _removeElement = function(element) {
- if (element != null) {
- try { document.body.removeChild(element); }
- catch (e) { }
- }
- };
- /**
- * helper to remove a list of elements from the DOM.
- */
- var _removeElements = function(elements) {
- for (var i in elements)
- _removeElement(elements[i]);
- };
- /**
- * helper method to remove an item from a list.
- */
- var _removeFromList = function(map, key, value) {
- var l = map[key];
- if (l != null) {
- var i = _findIndex(l, value);
- if (i >= 0) {
- delete( l[i] );
- l.splice( i, 1 );
- return true;
- }
- }
- return false;
- };
- /**
- * Sets whether or not the given element(s) should be draggable, regardless of what a particular
- * plumb command may request.
- *
- * @param element May be a string, a jQuery elements, or a list of strings/jquery elements.
- * @param draggable Whether or not the given element(s) should be draggable.
- */
- var _setDraggable = function(element, draggable) {
- var _helper = function(el, id) {
- draggableStates[id] = draggable;
- if (_isDragSupported(el)) {
- // TODO: not library agnostic yet.
- jsPlumb.CurrentLibrary.setDraggable(el, draggable);
- //el.draggable("option", "disabled", !draggable);
- }
- };
-
- return _elementProxy(element, _helper);
- };
- /**
- * private method to do the business of hiding/showing.
- * @param el either Id of the element in question or a jquery object for the element.
- * @param state String specifying a value for the css 'display' property ('block' or 'none').
- */
- var _setVisible = function(el, state) {
- var elId = _getAttribute(el, "id");
- var f = function(jpc) {
- jpc.canvas.style.display = state;
- };
- _operation(elId, f);
- };
- /**
- * toggles the draggable state of the given element(s).
- * @param el either an id, or a jquery object, or a list of ids/jquery objects.
- */
- var _toggleDraggable = function(el) {
- var fn = function(el, elId) {
- var state = draggableStates[elId] == null ? _draggableByDefault : draggableStates[elId];
- state = !state;
- draggableStates[elId] = state;
- //el.draggable("option", "disabled", !state);
- jsPlumb.CurrentLibrary.setDraggable(el, state);
- return state;
- };
- return _elementProxy(el, fn);
- };
- /**
- * private method to do the business of toggling hiding/showing.
- * @param elId Id of the element in question
- */
- var _toggleVisible = function(elId) {
- var f = function(jpc) {
- var state = ('none' == jpc.canvas.style.display);
- jpc.canvas.style.display = state ? "block" : "none";
- };
-
- _operation(elId, f);
-
- //todo this should call _elementProxy, and pass in the _operation(elId, f) call as a function. cos _toggleDraggable does that.
- };
- /**
- * updates the offset and size for a given element, and stores the values.
- * if 'offset' is not null we use that (it would have been passed in from a drag call) because it's faster; but if it is null,
- * or if 'recalc' is true in order to force a recalculation, we use the offset, outerWidth and outerHeight methods to get
- * the current values.
- */
- var _updateOffset = function(elId, offset, recalc) {
- if (recalc || offset == null) { // if forced repaint or no offset available, we recalculate.
- // get the current size and offset, and store them
- var s = _getElementObject(elId);
- sizes[elId] = _getSize(elId);
- offsets[elId] = _getOffset(elId);
- } else {
- offsets[elId] = offset;
- }
- };
-
- /**
- * wraps one function with another, creating a placeholder for the wrapped function
- * if it was null. this is used to wrap the various drag/drop event functions - to allow
- * jsPlumb to be notified of important lifecycle events without imposing itself on the user's
- * drap/drop functionality.
- * TODO: determine whether or not we should try/catch the plumb function, so that the cascade function is always executed.
- */
- var _wrap = function(cascadeFunction, plumbFunction) {
- cascadeFunction = cascadeFunction || function() { };
- return function() {
- plumbFunction.apply(this, arguments);
- cascadeFunction.apply(this, arguments);
- };
- }
-
- /*
- Class: Anchor
- Models a position relative to the origin of some element that an Endpoint can be located.
- */
- /*
- Function: Anchor
-
- Constructor for the Anchor class
-
- Parameters:
- params - Anchor parameters. This should contain three values, and may optionally have an 'offsets' argument:
-
- - x : the x location of the anchor as a fraction of the total width.
- - y : the y location of the anchor as a fraction of the total height.
- - orientation : an [x,y] array indicating the general direction a connection from the anchor should go in. for more info on this, see the documentation, or the docs in jquery-jsPlumb-defaults-XXX.js for the default Anchors.
- - offsets : an [x,y] array of fixed offsets that should be applied after the x,y position has been figured out. may be null.
- */
- var Anchor = function(params) {
- var self = this;
- this.x = params.x || 0; this.y = params.y || 0;
- var orientation = params.orientation || [0,0];
- this.offsets = params.offsets || [0,0];
- this.compute = function(xy, wh, txy, twh) {
- return [ xy[0] + (self.x * wh[0]) + self.offsets[0], xy[1] + (self.y * wh[1]) + self.offsets[1] ];
- }
- this.getOrientation = function() { return orientation; };
- };
-
- /**
- * An Anchor that floats. its orientation is computed dynamically from its position relative to the anchor it is floating relative to.
- *
- */
- var FloatingAnchor = function(params) {
-
- // this is the anchor that this floating anchor is referenced to for purposes of calculating the orientation.
- var ref = params.reference;
- // these are used to store the current relative position of our anchor wrt the reference anchor. they only indicate
- // direction, so have a value of 1 or -1 (or, very rarely, 0). these values are written by the compute method, and read
- // by the getOrientation method.
- var xDir = 0, yDir = 0;
- // temporary member used to store an orientation when the floating anchor is hovering over another anchor.
- var orientation = null;
-
- this.compute = function(xy, wh, txy, twh) {
- // set these for the getOrientation method to use.
- xDir = 0;//xy[0] < txy[0] ? -1 : xy[0] == txy[0] ? 0 : 1;
- yDir = 0;//xy[1] < txy[1] ? -1 : xy[1] == txy[1] ? 0 : 1;
- return [xy[0], xy[1]]; // return origin of the element. we may wish to improve this so that any object can be the drag proxy.
- };
-
- this.getOrientation = function() {
- if (orientation) return orientation;
- else {
- var o = ref.getOrientation();
- // here we take into account the orientation of the other anchor: if it declares zero for some direction, we declare zero too.
- // this might not be the most awesome. perhaps we can come up with a better way. it's just so that the line we draw looks
- // like it makes sense. maybe this wont make sense.
- return [Math.abs(o[0]) * xDir * -1, Math.abs(o[1]) * yDir * -1];
- }
- };
-
- /**
- * notification the endpoint associated with this anchor is hovering over another anchor;
- * we want to assume that anchor's orientation for the duration of the hover.
- */
- this.over = function(anchor) {
- orientation = anchor.getOrientation();
- };
-
- /**
- * notification the endpoint associated with this anchor is no longer hovering
- * over another anchor; we should resume calculating orientation as we normally do.
- */
- this.out = function() {
- orientation = null;
- };
- };
-
- // ************** connection
- // ****************************************
- /**
- * allowed params:
- * source: source element (string or a jQuery element) (required)
- * target: target element (string or a jQuery element) (required)
- *
- * anchors: optional array of anchor placements. defaults to BottomCenter for source
- * and TopCenter for target.
- */
- var Connection = function(params) {
- // ************** get the source and target and register the connection. *******************
- var self = this;
- // get source and target as jQuery objects
- this.source = _getElementObject(params.source);
- this.target = _getElementObject(params.target);
- this.sourceId = _getAttribute(this.source, "id");
- this.targetId = _getAttribute(this.target, "id");
- this.endpointsOnTop = params.endpointsOnTop != null ? params.endpointsOnTop : true;
-
- // init endpoints
- this.endpoints = [];
- this.endpointStyles = [];
- var prepareEndpoint = function(existing, index, params) {
- if (existing) self.endpoints[index] = existing;
- else {
- if(!params.endpoints) params.endpoints = [null,null];
- var ep = params.endpoints[index] || params.endpoint || jsPlumb.Defaults.Endpoints[index] || jsPlumb.Defaults.Endpoint|| new jsPlumb.Endpoints.Dot();
- if (!params.endpointStyles) params.endpointStyles = [null,null];
- var es = params.endpointStyles[index] || params.endpointStyle || jsPlumb.Defaults.EndpointStyles[index] || jsPlumb.Defaults.EndpointStyle;
- var a = params.anchors ? params.anchors[index] : jsPlumb.Defaults.Anchors[index] || jsPlumb.Anchors.BottomCenter;
- self.endpoints[index] = new Endpoint({style:es, endpoint:ep, connections:[self], anchor:a });
- }
- };
-
- prepareEndpoint(params.sourceEndpoint, 0, params);
- prepareEndpoint(params.targetEndpoint, 1, params);
-
- this.connector = this.endpoints[0].connector || this.endpoints[1].connector || params.connector || jsPlumb.Defaults.Connector || new jsPlumb.Connectors.Bezier();
- this.paintStyle = this.endpoints[0].connectionStyle || this.endpoints[1].connectionStyle || params.paintStyle || jsPlumb.Defaults.PaintStyle;
-
- _updateOffset(this.sourceId);
- _updateOffset(this.targetId);
-
- // paint the endpoints
- var myOffset = offsets[this.sourceId], myWH = sizes[this.sourceId];
- var anchorLoc = this.endpoints[0].anchor.compute([myOffset.left, myOffset.top], myWH);
- this.endpoints[0].paint(anchorLoc);
- myOffset = offsets[this.targetId]; myWH = sizes[this.targetId];
- anchorLoc = this.endpoints[1].anchor.compute([myOffset.left, myOffset.top], myWH);
- this.endpoints[1].paint(anchorLoc);
- // *************** create canvas on which the connection will be drawn ************
- var canvas = _newCanvas(jsPlumb.connectorClass);
- this.canvas = canvas;
-
- /**
- * paints the connection.
- * @param elId Id of the element that is in motion
- * @param ui current library's event system ui object (present if we came from a drag to get here)
- * @param recalc whether or not to recalculate element sizes. this is true if a repaint caused this to be painted.
- */
- this.paint = function(elId, ui, recalc) {
-
- if (log) log.debug("Painting Connection; element in motion is " + elId + "; ui is [" + ui + "]; recalc is [" + recalc + "]");
-
- var fai = self.floatingAnchorIndex;
- // if the moving object is not the source we must transpose the two references.
- var swap = !(elId == this.sourceId);
- var tId = swap ? this.sourceId : this.targetId, sId = swap ? this.targetId : this.sourceId;
- var tIdx = swap ? 0 : 1, sIdx = swap ? 1 : 0;
- var el = swap ? this.target : this.source;
-
- if (this.canvas.getContext) {
-
- _updateOffset(elId, ui, recalc);
- if (recalc) _updateOffset(tId); // update the target if this is a forced repaint. otherwise, only the source has been moved.
-
- var myOffset = offsets[elId];
- var otherOffset = offsets[tId];
- var myWH = sizes[elId];
- var otherWH = sizes[tId];
-
- var ctx = canvas.getContext('2d');
- var sAnchorP = this.endpoints[sIdx].anchor.compute([myOffset.left, myOffset.top], myWH, [otherOffset.left, otherOffset.top], otherWH);
- var sAnchorO = this.endpoints[sIdx].anchor.getOrientation();
- var tAnchorP = this.endpoints[tIdx].anchor.compute([otherOffset.left, otherOffset.top], otherWH, [myOffset.left, myOffset.top], myWH);
- var tAnchorO = this.endpoints[tIdx].anchor.getOrientation();
- var dim = this.connector.compute(sAnchorP, tAnchorP, this.endpoints[sIdx].anchor, this.endpoints[tIdx].anchor, this.paintStyle.lineWidth);
- jsPlumb.sizeCanvas(canvas, dim[0], dim[1], dim[2], dim[3]);
- jsPlumb.extend(ctx, this.paintStyle);
-
- if (this.paintStyle.gradient && !ie) {
- var g = swap ? ctx.createLinearGradient(dim[4], dim[5], dim[6], dim[7]) : ctx.createLinearGradient(dim[6], dim[7], dim[4], dim[5]);
- for (var i = 0; i < this.paintStyle.gradient.stops.length; i++)
- g.addColorStop(this.paintStyle.gradient.stops[i][0],this.paintStyle.gradient.stops[i][1]);
- ctx.strokeStyle = g;
- }
-
- this.connector.paint(dim, ctx);
- }
- };
-
- this.repaint = function() {
- this.paint(this.sourceId, null, true);
- };
- _initDraggableIfNecessary(self.source, self.sourceId, params.draggable, params.dragOptions);
- _initDraggableIfNecessary(self.target, self.targetId, params.draggable, params.dragOptions);
-
- // resizing (using the jquery.ba-resize plugin). todo: decide whether to include or not.
- if (this.source.resize) {
- this.source.resize(function(e) {
- jsPlumb.repaint(self.sourceId);
- });
- }
- };
-
- /*
- Class: Endpoint
-
- Models an endpoint. Can have one to N connections emanating from it (although how to handle that in the UI is
- a very good question). also has a Canvas and paint style.
-
- */
-
- /*
- Function: Endpoint
-
- This is the Endpoint class constructor.
-
- Parameters:
-
- anchor - anchor for the endpoint, of type jsPlumb.Anchor. may be null.
- endpoint - endpoint object, of type jsPlumb.Endpoint. may be null.
- style - endpoint style, a js object. may be null.
- source - element the endpoint is attached to, of type jquery object. Required.
- canvas - canvas element to use. may be, and most often is, null.
- connections - optional list of connections to configure the endpoint with.
- isSource - boolean. indicates the endpoint can act as a source of new connections. optional.
- dragOptions - if isSource is set to true, you can supply arguments for the jquery draggable method. optional.
- connectionStyle - if isSource is set to true, this is the paint style for connections from this endpoint. optional.
- connector - optional connector type to use.
- isTarget - boolean. indicates the endpoint can act as a target of new connections. optional.
- dropOptions - if isTarget is set to true, you can supply arguments for the jquery droppable method. optional.
- reattach - optional boolean that determines whether or not the connections reattach after they
- have been dragged off an endpoint and left floating. defaults to false: connections
- dropped in this way will just be deleted.
- */
- var Endpoint = function(params) {
- params = params || {};
- // make a copy. then we can use the wrapper function.
- jsPlumb.extend({}, params);
- var self = this;
- self.anchor = params.anchor || jsPlumb.Anchors.TopCenter;
- var _endpoint = params.endpoint || new jsPlumb.Endpoints.Dot();
- var _style = params.style || jsPlumb.Defaults.EndpointStyle;
- this.connectionStyle = params.connectionStyle;
- this.connector = params.connector;
- var _element = params.source;
- var _elementId = _getAttribute(_element, "id");
- var _maxConnections = params.maxConnections || 1; // maximum number of connections this endpoint can be the source of.
- this.canvas = params.canvas || _newCanvas(jsPlumb.endpointClass);
- this.connections = params.connections || [];
- var _reattach = params.reattach || false;
- var floatingEndpoint = null;
- this.addConnection = function(connection) {
- self.connections.push(connection);
- };
- this.removeConnection = function(connection) {
- var idx = _findIndex(self.connections, connection);
- if (idx >= 0)
- self.connections.splice(idx, 1);
- };
- /**
- * returns whether or not this endpoint is connected to the given endpoint.
- * @param endpoint Endpoint to test.
- * @since 1.1.1
- *
- * todo: needs testing. will this work if the endpoint passed in is the source?
- */
- this.isConnectedTo = function(endpoint) {
- var found = false;
- if (endpoint) {
- for (var i = 0; i < self.connections.length; i++) {
- if (self.connections[i].endpoints[1] == endpoint) {
- found = true;
- break;
- }
- }
- }
- return found;
- };
-
- this.isFloating = function() { return floatingEndpoint != null; };
- /**
- * first pass at default ConnectorSelector: returns the first connection, if we have any.
- * modified a little, 5/10/2010: now it only returns a connector if we have not got equal to or more than _maxConnector connectors
- * attached. otherwise it is assumed a new connector is ok. but note with this setup we can't select any other connection than the first
- * one. what if this could return a list? that implies everything should work with a list - dragging etc. could be nasty. could also
- * be cool.
- */
- var connectorSelector = function() {
- return self.connections.length == 0 || self.connections.length < _maxConnections ? null : self.connections[0];
- };
-
- this.isFull = function() { return _maxConnections < 1 ? false : (self.connections.length >= _maxConnections); };
-
- /**
- * paints the Endpoint, recalculating offset and anchor positions if necessary.
- */
- this.paint = function(anchorPoint, connectorPaintStyle, canvas) {
-
- if (log) log.debug("Painting Endpoint with elementId [" + _elementId + "]; anchorPoint is [" + anchorPoint + "]");
-
- if (anchorPoint == null) {
- // do we always want to force a repaint here? i dont think so!
- var xy = offsets[_elementId];
- var wh = sizes[_elementId];
- if (xy == null || wh == null) {
- _updateOffset(_elementId);
- xy = offsets[_elementId];
- wh = sizes[_elementId];
- }
- anchorPoint = self.anchor.compute([xy.left, xy.top], wh);
- }
- _endpoint.paint(anchorPoint, self.anchor.getOrientation(), canvas || self.canvas, _style, connectorPaintStyle || _style);
- };
-
-
- // is this a connection source? we make it draggable and have the drag listener
- // maintain a connection with a floating endpoint.
- if (params.isSource && _isDragSupported(_element)) {
-
- var n = null, id = null, jpc = null, existingJpc = false, existingJpcParams = null;
-
- // first the question is, how many connections are on this endpoint? if it's only one, then excellent. otherwise we will either need a way
- // to select one connection from the list, or drag them all. if we had a pluggable 'ConnectorSelector' interface we could probably
- // provide a way for people to implement their own UI components to do the connector selection. the question in that particular case would be how much
- // information the interface needs from jsPlumb at execution time. if, however, we leave out the connector selection, and drag them all,
- // that wouldn't be too hard to organise. perhaps that behaviour would be on a switch for the endpoint, or perhaps the ConnectorSelector
- // interface returns a List, with the default implementation just returning everything. i think i like that.
- //
- // let's say for now that there is just one endpoint, cos we need to get this going before we can consider a list of them anyway.
- // the major difference between that case and the case of a new endpoint is actually quite small - it's a question of where the
- // Connection comes from. for a new one, we create a new one. obviously. otherwise we just get the jpc from the Endpoint
- // (remember we're only assuming one connection right now). so all of the UI stuff we do to create the floating endpoint etc
- // will still be valid, but when we stop dragging, we'll have to do something different. if we stop with a valid drop i think it will
- // be the same process. but if we stop with an invalid drop we have to reset the Connection to how it was when we got it.
- var start = function() {
- n = document.createElement("div");
- _appendCanvas(n);
- // create and assign an id, and initialize the offset.
- var id = "" + new String(new Date().getTime());
- _setAttribute(_getElementObject(n), "id", id);
- _updateOffset(id);
- // store the id of the dragging div and the source element. the drop function
- // will pick these up.
- _setAttribute(_getElementObject(self.canvas), "dragId", id);
- _setAttribute(_getElementObject(self.canvas), "elId", _elementId);
- // create a floating anchor
- var floatingAnchor = new FloatingAnchor({reference:self.anchor});
- floatingEndpoint = new Endpoint({
- style:_style,
- endpoint:_endpoint,
- anchor:floatingAnchor,
- source:n
- });
-
- jpc = connectorSelector();
- if (jpc == null) {
- // create a connection. one end is this endpoint, the other is a floating endpoint.
- jpc = new Connection({
- sourceEndpoint:self,
- targetEndpoint:floatingEndpoint,
- source:_getElementObject(_element),
- target:_getElementObject(n),
- anchors:[self.anchor, floatingAnchor],
- paintStyle : params.connectionStyle, // this can be null. Connection will use the default.
- connector: params.connector
- });
- // todo ...unregister on stop
- self.addConnection(jpc);
- } else {
- existingJpc = true;
- var anchorIdx = jpc.sourceId == _elementId ? 0 : 1;
- jpc.floatingAnchorIndex = anchorIdx;
- // probably we should remove the connection? and add it back if the user
- // does not drop it somewhere proper.
- self.removeConnection(jpc);
- if (anchorIdx == 0){
- existingJpcParams = [jpc.source, jpc.sourceId];
- jpc.source = _getElementObject(n);
- jpc.sourceId = id;
- }else {
- existingJpcParams = [jpc.target, jpc.targetId];
- jpc.target = _getElementObject(n);
- jpc.targetId = id;
- }
-
- jpc.suspendedEndpoint = jpc.endpoints[anchorIdx];
- jpc.endpoints[anchorIdx] = floatingEndpoint;
- }
-
- // register it.
- floatingConnections[id] = jpc;
-
- // todo unregister on stop
- floatingEndpoint.addConnection(jpc);
-
- // only register for the target endpoint; we will not be dragging the source at any time
- // before this connection is either discarded or made into a permanent connection.
- _addToList(endpointsByElement, id, floatingEndpoint);
-
- };
-
- var dragOptions = params.dragOptions || { };
-
- var defaultOpts = jsPlumb.extend({}, jsPlumb.CurrentLibrary.defaultDragOptions);
- dragOptions = jsPlumb.extend(defaultOpts, dragOptions);
- var startEvent = jsPlumb.CurrentLibrary.dragEvents['start'];
- var stopEvent = jsPlumb.CurrentLibrary.dragEvents['stop'];
- var dragEvent = jsPlumb.CurrentLibrary.dragEvents['drag'];
- dragOptions[startEvent] = _wrap(dragOptions[startEvent], start);
- dragOptions[dragEvent] = _wrap(dragOptions[dragEvent], function() {
- var _ui = jsPlumb.CurrentLibrary.getUIPosition(arguments);
- _draw(_getElementObject(n), _ui);
- });
- dragOptions[stopEvent] = _wrap(dragOptions[stopEvent],
- function() {
- _removeFromList(endpointsByElement, id, floatingEndpoint);
- _removeElements([floatingEndpoint.canvas, n]);
- var idx = jpc.floatingAnchorIndex == null ? 1 : jpc.floatingAnchorIndex;
- if (jpc.endpoints[idx] == floatingEndpoint) {
- // if the connection was an existing one:
- if (existingJpc && jpc.suspendedEndpoint) {
- if (_reattach) {
- jpc.floatingAnchorIndex = null;
- if (idx == 0) {
- jpc.source = existingJpcParams[0];
- jpc.sourceId = existingJpcParams[1];
- } else {
- jpc.target = existingJpcParams[0];
- jpc.targetId = existingJpcParams[1];
- }
- jpc.endpoints[idx] = jpc.suspendedEndpoint;
- jpc.suspendedEndpoint.addConnection(jpc);
- jsPlumb.repaint(existingJpcParams[1]);
- }
- else {
- jpc.endpoints[0].removeConnection(jpc);
- jpc.endpoints[1].removeConnection(jpc);
- _removeElement(jpc.canvas);
- }
- } else {
- _removeElement(jpc.canvas);
- self.removeConnection(jpc);
- }
- }
- jpc = null;
- delete floatingEndpoint;
- }
- );
-
- var i = _getElementObject(self.canvas);
- _initDraggable(i, dragOptions);
- };
-
- // connector target
- if (params.isTarget && _isDropSupported(_element)) {
- var dropOptions = params.dropOptions || jsPlumb.Defaults.DropOptions;
- dropOptions = jsPlumb.extend({}, dropOptions);
- var originalAnchor = null;
- dropOptions.drop = _wrap(dropOptions.drop, function() {
- var draggable = jsPlumb.CurrentLibrary.getDragObject(arguments);
- var id = _getAttribute(_getElementObject(draggable), "dragId");
- var elId = _getAttribute(_getElementObject(draggable),"elId");
- var jpc = floatingConnections[id];
- var idx = jpc.floatingAnchorIndex == null ? 1 : jpc.floatingAnchorIndex;
- if (idx == 0) {
- jpc.source = _element;
- jpc.sourceId = _elementId;
- } else {
- jpc.target = _element;
- jpc.targetId = _elementId;
- }
- // remove this jpc from the current endpoint
- jpc.endpoints[idx].removeConnection(jpc);
- if (jpc.suspendedEndpoint)
- jpc.suspendedEndpoint.removeConnection(jpc);
- jpc.endpoints[idx] = self;
- self.addConnection(jpc);
- _initDraggableIfNecessary(_element, _elementId, params.draggable, {});
- jsPlumb.repaint(elId);
-
- delete floatingConnections[id];
- });
- // what to do when something is dropped.
- // 1. find the jpc that is being dragged. the target endpoint of the jpc will be the
- // one that is being dragged.
- // 2. arrange for the floating endpoint to be replaced with this endpoint; make sure
- // everything gets registered ok etc.
- // 3. arrange for the floating endpoint to be deleted.
- // 4. make sure that the stop method of the drag does not cause the jpc to be cleaned up. we want to keep it now.
-
- // other considerations: when in the hover mode, we should switch the floating endpoint's
- // orientation to be the same as the drop target. this will cause the connector to snap
- // into the shape it will take if the user drops at that point.
-
- dropOptions.over = _wrap(dropOptions.over, function() {
- var draggable = jsPlumb.CurrentLibrary.getDragObject(arguments);
- var id = _getAttribute(_getElementObject(draggable),"dragId");
- var jpc = floatingConnections[id];
- var idx = jpc.floatingAnchorIndex == null ? 1 : jpc.floatingAnchorIndex;
- jpc.endpoints[idx].anchor.over(self.anchor);
- });
-
- dropOptions.out = _wrap(dropOptions.out, function() {
- var draggable = jsPlumb.CurrentLibrary.getDragObject(arguments);
- var id = _getAttribute(_getElementObject(draggable),"dragId");
- var jpc = floatingConnections[id];
- var idx = jpc.floatingAnchorIndex == null ? 1 : jpc.floatingAnchorIndex;
- jpc.endpoints[idx].anchor.out();
- });
-
- _initDroppable(_getElementObject(self.canvas), dropOptions);
- }
-
- return self;
- };
-
- /*
- Class: jsPlumb
-
- This is the main entry point to jsPlumb. There are a bunch of static methods you can
- use to connect/disconnect etc. Some methods are also added to jQuery's "$.fn" object itself, but
- in general jsPlumb is moving away from that model, preferring instead the static class
- approach. One of the reasons for this is that with no methods added to the jQuery $.fn object,
- it will be easier to provide support for other libraries such as MooTools.
- */
- var jsPlumb = window.jsPlumb = {
-
- /*
- Property: Defaults
-
- These are the default settings for jsPlumb, that is what will be used if you do not supply specific pieces of information
- to the various API calls. A convenient way to implement your own look and feel can be to override these defaults by including a script
- somewhere after the jsPlumb include, but before you make any calls to jsPlumb, for instance in this example we set the PaintStyle to be
- a blue line of 27 pixels:
-
- > jsPlumb.Defaults.PaintStyle = { lineWidth:27, strokeStyle:'blue' }
-
- */
- Defaults : {
- Anchors : [ null, null ],
- Connector : null,
- DragOptions: { },
- DropOptions: { },
- Endpoint : null,
- Endpoints : [ null, null ],
- EndpointStyle : { fillStyle : null },
- EndpointStyles : [ null, null ],
- MaxConnections : null,
- PaintStyle : { lineWidth : 10, strokeStyle : 'red' }
- },
-
- /*
- Property: connectorClass
-
- The CSS class to set on Connection canvas elements. This value is a String and can have multiple classes; the entire String is appended as-is.
- */
- connectorClass : '_jsPlumb_connector',
-
- /*
- Property: endpointClass
-
- The CSS class to set on Endpoint canvas elements. This value is a String and can have multiple classes; the entire String is appended as-is.
- */
- endpointClass : '_jsPlumb_endpoint',
-
- /*
- Property: Anchors
-
- Default jsPlumb Anchors. These are supplied in the file jquery.jsPlumb-defaults-x.x.x.js, which is merged in with the main jsPlumb script
- to form jquery.jsPlumb-all-x.x.x.js. You can provide your own Anchors by supplying them in a script that is loaded after jsPlumb, for instance:
-
- > jsPlumb.Anchors.MyAnchor = { ....anchor code here. see the documentation. }
- */
- Anchors : {},
-
- /*
- Property: Connectors
-
- Default jsPlumb Connectors. These are supplied in the file jquery.jsPlumb-defaults-x.x.x.js, which is merged in with the main jsPlumb script
- to form jquery.jsPlumb-all-x.x.x.js. You can provide your own Connectors by supplying them in a script that is loaded after jsPlumb, for instance:
-
- > jsPlumb.Connectors.MyConnector = { ....connector code here. see the documentation. }
- */
- Connectors : {},
-
- /*
- Property: Endpoints
-
- Default jsPlumb Endpoints. These are supplied in the file jquery.jsPlumb-defaults-x.x.x.js, which is merged in with the main jsPlumb script
- to form jquery.jsPlumb-all-x.x.x.js. You can provide your own Endpoints by supplying them in a script that is loaded after jsPlumb, for instance:
-
- > jsPlumb.Endpoints.MyEndpoint = { ....endpoint code here. see the documentation. }
- */
- Endpoints : {},
-
- /*
- Function: addEndpoint
-
- Adds an Endpoint to a given element.
-
- Parameters:
- target - Element to add the endpoint to. either an element id, or a jQuery object representing some element.
- params - Object containing Endpoint options (more info required)
-
- Returns:
-
- The newly created Endpoint.
-
- See Also:
-
- <addEndpoints>
- */
- addEndpoint : function(target, params) {
- params = jsPlumb.extend({}, params);
- var el = _getElementObject(target);
- var id = _getAttribute(target,"id");
- params.source = el;
- _updateOffset(id);
- var e = new Endpoint(params);
- _addToList(endpointsByElement, id, e);
- var myOffset = offsets[id];
- var myWH = sizes[id];
- var anchorLoc = e.anchor.compute([myOffset.left, myOffset.top], myWH);
- e.paint(anchorLoc);
- return e;
- },
-
- /*
- Function: addEndpoint
-
- Adds a list of Endpoints to a given element.
-
- Parameters:
-
- target - element to add the endpoint to. either an element id, or a jQuery object representing some element.
- endpoints - List of objects containing Endpoint options. one Endpoint is created for each entry in this list.
-
- Returns:
-
- List of newly created Endpoints, one for each entry in the 'endpoints' argument.
-
- See Also:
-
- <addEndpoint>
- */
- addEndpoints : function(target, endpoints) {
- var results = [];
- for (var i = 0; i < endpoints.length; i++) {
- results.push(jsPlumb.addEndpoint(target, endpoints[i]));
- }
- return results;
- },
-
- /*
- Function: animate
-
- Wrapper around standard jQuery animate function; injects a call to jsPlumb in the 'step' function (creating it if necessary).
- This only supports the two-arg version of the animate call in jQuery - the one that takes an 'options' object as the second arg.
-
- Parameters:
-
- el - Element to animate. Either an id, or a jQuery object representing the element.
- properties - The 'properties' argument you want passed to the standard jQuery animate call.
- options - The 'options' argument you want passed to the standard jQuery animate call.
-
- Returns:
-
- void
- */
- animate : function(el, properties, options) {
- var ele = _getElementObject(el);
- var id = _getAttribute(el,"id");
- options = options || {};
- options.step = _wrap(options.step, function() { jsPlumb.repaint(id); });
- _animate(ele, properties, options);
- },
-
- /*
- Function: connect
-
- Establishes a connection between two elements.
-
- Parameters:
-
- params - Object containing setup for the connection. see documentation.
-
- Returns:
-
- The newly created Connection.
-
- */
- connect : function(params) {
- if (params.sourceEndpoint && params.sourceEndpoint.isFull()) {
- _log("could not add connection; source endpoint is full");
- return;
- }
-
- if (params.targetEndpoint && params.targetEndpoint.isFull()) {
- _log("could not add connection; target endpoint is full");
- return;
- }
-
- var jpc = new Connection(params);
-
- // register endpoints for the element. todo: is the test below sufficient? or should we test if the endpoint is already in the list,
- // and add it only then? perhaps _addToList could be overloaded with a a 'test for existence first' parameter?
- //_addToList(endpointsByElement, jpc.sourceId, jpc.endpoints[0]);
- //_addToList(endpointsByElement, jpc.targetId, jpc.endpoints[1]);
-
- if (!params.sourceEndpoint) _addToList(endpointsByElement, jpc.sourceId, jpc.endpoints[0]);
- if (!params.targetEndpoint) _addToList(endpointsByElement, jpc.targetId, jpc.endpoints[1]);
-
- jpc.endpoints[0].addConnection(jpc);
- jpc.endpoints[1].addConnection(jpc);
-
- // force a paint
- _draw(jpc.source);
-
- return jpc;
-
- },
-
- /**
- * not implemented yet. params object will have sourceEndpoint and targetEndpoint members; these will be Endpoints.
- connectEndpoints : function(params) {
- var jpc = Connection(params);
-
- },*/
-
- /*
- Function: detach
-
- Removes a connection.
-
- Parameters:
-
- sourceId - Id of the first element in the connection. A String.
- targetId - iI of the second element in the connection. A String.
-
- Returns:
-
- true if successful, false if not.
- */
- detach : function(sourceId, targetId) {
- var f = function(jpc) {
- if ((jpc.sourceId == sourceId && jpc.targetId == targetId) || (jpc.targetId == sourceId && jpc.sourceId == targetId)) {
- _removeElement(jpc.canvas);
- jpc.endpoints[0].removeConnection(jpc);
- jpc.endpoints[1].removeConnection(jpc);
- return true;
- }
- };
-
- // todo: how to cleanup the actual storage? a third arg to _operation?
- _operation(sourceId, f);
- },
-
- /*
- Function: detachAll
-
- Removes all an element's connections.
-
- Parameters:
-
- el - either the id of the element, or a jQuery object for the element.
-
- Returns:
-
- void
- */
- detachAll : function(el) {
- var id = _getAttribute(el, "id");
- var f = function(jpc) {
- // todo replace with _cleanupConnection call here.
- _removeElement(jpc.canvas);
- jpc.endpoints[0].removeConnection(jpc);
- jpc.endpoints[1].removeConnection(jpc);
- };
- _operation(id, f);
- //delete endpointsByElement[id]; ??
- },
-
- /*
- Function: detachEverything
-
- Remove all Connections from all elements, but leaves Endpoints in place.
-
- Returns:
-
- void
-
- See Also:
-
- <removeAllEndpoints>
- */
- detachEverything : function() {
- var f = function(jpc) {
- _removeElement(jpc.canvas);
- jpc.endpoints[0].removeConnection(jpc);
- jpc.endpoints[1].removeConnection(jpc);
- };
-
- _operationOnAll(f);
-
- /*delete endpointsByElement; //??
- endpointsByElement = {};*/ //??
- },
-
- extend : function(o1, o2) {
- return jsPlumb.CurrentLibrary.extend(o1, o2);
- },
-
- /*
- Function: hide
-
- Sets an element's connections to be hidden.
-
- Parameters:
-
- el - either the id of the element, or a jQuery object for the element.
-
- Returns:
-
- void
- */
- hide : function(el) {
- _setVisible(el, "none");
- },
-
- /*
- Function: makeAnchor
-
- Creates an anchor with the given params.
-
- Parameters:
-
- x - the x location of the anchor as a fraction of the total width.
- y - the y location of the anchor as a fraction of the total height.
- xOrientation - value indicating the general direction a connection from the anchor should go in, in the x direction.
- yOrientation - value indicating the general direction a connection from the anchor should go in, in the y direction.
- xOffset - a fixed offset that should be applied in the x direction that should be applied after the x position has been figured out. optional. defaults to 0.
- yOffset - a fixed offset that should be applied in the y direction that should be applied after the y position has been figured out. optional. defaults to 0.
-
- Returns:
-
- The newly created Anchor.
- */
- makeAnchor : function(x, y, xOrientation, yOrientation, xOffset, yOffset) {
- // backwards compatibility here. we used to require an object passed in but that makes the call very verbose. easier to use
- // by just passing in four/six values. but for backwards compatibility if we are given only one value we assume it's a call in the old form.
- var params = {};
- if (arguments.length == 1) jsPlumb.extend(params, x);
- else {
- params = {x:x, y:y};
- if (arguments.length >= 4) {
- params.orientation = [arguments[2], arguments[3]];
- }
- if (arguments.length == 6) params.offsets = [arguments[4], arguments[5]];
- }
- return new Anchor(params);
- },
-
-
- /*
- Function: repaint
-
- Repaints an element and its connections. This method gets new sizes for the elements before painting anything.
-
- Parameters:
-
- el - either the id of the element or a jQuery object representing the element.
-
- Returns:
-
- void
-
- See Also:
-
- <repaintEverything>
- */
- repaint : function(el) {
-
- var _processElement = function(el) {
- var ele = _getElementObject(el);
- _draw(ele);
- };
-
- // TODO: support a jQuery result object too!
-
- // support both lists...
- if (typeof el =='object') {
- for (var i = 0; i < el.length; i++)
- _processElement(el[i]);
- } // ...and single strings.
- else _processElement(el);
- },
-
- /*
- Function: repaintEverything
-
- Repaints all connections.
-
- Returns:
-
- void
-
- See Also:
-
- <repaint>
- */
- repaintEverything : function() {
- for (var elId in endpointsByElement) {
- _draw(_getElementObject(elId));
- }
- },
-
- /*
- Function: removeAllEndpoints
-
- Removes all Endpoints associated with a given element. Also removes all Connections associated with each Endpoint it removes.
-
- Parameters:
-
- el - either an element id, or a jQuery object for an element.
-
- Returns:
-
- void
-
- See Also:
-
- <removeEndpoint>
- */
- removeAllEndpoints : function(el) {
- var elId = _getAttribute(el, "id");
- // first remove all Connections.
- jsPlumb.detachAll(elId);
- var ebe = endpointsByElement[elId];
- for (var i in ebe) {
- _removeElement(ebe[i].canvas);
- }
- endpointsByElement[elId] = [];
- },
-
- /*
- Function: removeEndpoint
-
- Removes the given Endpoint from the given element.
-
- Parameters:
-
- el - either an element id, or a jQuery object for an element.
- endpoint - Endpoint to remove. this is an Endpoint object, such as would have been returned from a call to addEndpoint.
-
- Returns:
-
- void
-
- See Also:
-
- <removeAllEndpoints>
- */
- removeEndpoint : function(el, endpoint) {
- var elId = _getAttribute(el, "id");
- var ebe = endpointsByElement[elId];
- if (ebe) {
- if(_removeFromList(endpointsByElement, elId, endpoint))
- _removeElement(endpoint.canvas);
- }
- },
-
- /*
- Function: setAutomaticRepaint
-
- Sets/unsets automatic repaint on window resize.
-
- Parameters:
-
- value - whether or not to automatically repaint when the window is resized.
-
- Returns:
-
- void
- */
- setAutomaticRepaint : function(value) {
- automaticRepaint = value;
- },
-
- /*
- Function: setDefaultNewCanvasSize
-
- Sets the default size jsPlumb will use for a new canvas (we create a square canvas so one value is all that is required).
- This is a hack for IE, because ExplorerCanvas seems to need for a canvas to be larger than what you are going to draw on
- it at initialisation time. The default value of this is 1200 pixels, which is quite large, but if for some reason you're
- drawing connectors that are bigger, you should adjust this value appropriately.
-
- Parameters:
-
- size - The default size to use. jsPlumb will use a square canvas so you need only supply one value.
-
- Returns:
-
- void
- */
- setDefaultNewCanvasSize : function(size) {
- DEFAULT_NEW_CANVAS_SIZE = size;
- },
-
- /*
- Function: setDraggable
-
- Sets whether or not a given element is draggable, regardless of what any plumb command may request.
-
- Parameters:
-
- el - either the id for the element, or a jQuery object representing the element.
-
- Returns:
-
- void
- */
- setDraggable: _setDraggable,
-
- /*
- Function: setDraggableByDefault
-
- Sets whether or not elements are draggable by default. Default for this is true.
-
- Parameters:
- draggable - value to set
-
- Returns:
-
- void
- */
- setDraggableByDefault: function(draggable) {
- _draggableByDefault = draggable;
- },
-
- setDebugLog: function(debugLog) {
- log = debugLog;
- },
-
- /*
- Function: setRepaintFunction
-
- Sets the function to fire when the window size has changed and a repaint was fired.
-
- Parameters:
- f - Function to execute.
-
- Returns:
- void
- */
- setRepaintFunction : function(f) {
- repaintFunction = f;
- },
-
- /*
- Function: show
-
- Sets an element's connections to be visible.
-
- Parameters:
- el - either the id of the element, or a jQuery object for the element.
-
- Returns:
- void
- */
- show : function(el) {
- _setVisible(el, "block");
- },
-
- /*
- Function: sizeCanvas
-
- Helper to size a canvas. You would typically use this when writing your own Connector or Endpoint implementation.
-
- Parameters:
- x - [int] x position for the Canvas origin
- y - [int] y position for the Canvas origin
- w - [int] width of the canvas
- h - [int] height of the canvas
-
- Returns:
- void
- */
- sizeCanvas : function(canvas, x, y, w, h) {
- if (canvas) {
- canvas.style.height = h + "px"; canvas.height = h;
- canvas.style.width = w + "px"; canvas.width = w;
- canvas.style.left = x + "px"; canvas.style.top = y + "px";
- }
- },
-
- /**
- * gets some test hooks. nothing writable.
- */
- getTestHarness : function() {
- return {
- endpointCount : function(elId) {
- var e = endpointsByElement[elId];
- return e ? e.length : 0;
- }
- };
- },
-
- /**
- * Toggles visibility of an element's connections. kept for backwards compatibility
- */
- toggle : _toggleVisible,
-
- /*
- Function: toggleVisible
-
- Toggles visibility of an element's connections.
-
- Parameters:
- el - either the element's id, or a jQuery object representing the element.
-
- Returns:
- void, but should be updated to return the current state
- */
- //TODO: update this method to return the current state.
- toggleVisible : _toggleVisible,
-
- /*
- Function: toggleDraggable
-
- Toggles draggability (sic) of an element's connections.
-
- Parameters:
- el - either the element's id, or a jQuery object representing the element.
-
- Returns:
- The current draggable state.
- */
- toggleDraggable : _toggleDraggable,
-
- /*
- Function: unload
-
- Unloads jsPlumb, deleting all storage. You should call this from an onunload attribute on the <body> element
-
- Returns:
- void
- */
- unload : function() {
- delete endpointsByElement;
- delete offsets;
- delete sizes;
- delete floatingConnections;
- delete draggableStates;
- }
- };
- })();
- // jQuery plugin code
- (function($){
- /**
- * plumbs the results of the selector to some target, using the given options if supplied,
- * or the defaults otherwise. this is DEPRECATED. just use jsPlumb.connect(..) instead.
- * @deprecated
- */
- $.fn.plumb = function(options) {
- var options = $.extend({}, options);
- return this.each(function()
- {
- var params = $.extend({source:$(this)}, options);
- jsPlumb.connect(params);
- });
- };
-
- /**
- * detaches the results of the selector from the given target or list of targets - 'target'
- * may be a String or a List.
- */
- $.fn.detach = function(target) {
- return this.each(function()
- {
- var id = $(this).attr("id");
- if (typeof target == 'string') target = [target];
- for (var i = 0; i < target.length; i++)
- jsPlumb.detach(id, target[i]);
- });
- };
-
- /**
- * detaches the results from the selector from all connections.
- */
- $.fn.detachAll = function() {
- return this.each(function()
- {
- var id = $(this).attr("id");
- jsPlumb.detachAll(id);
- });
- };
-
- /**
- * adds an endpoint to the elements resulting from the selector. options may be null,
- * in which case jsPlumb will use the default options. see documentation.
- */
- $.fn.addEndpoint = function(options) {
- var addedEndpoints = [];
- this.each(function()
- {
- addedEndpoints.push(jsPlumb.addEndpoint($(this).attr("id"), options));
- });
- return addedEndpoints[0];
- };
-
- /**
- * adds a list of endpoints to the elements resulting from the selector. options may be null,
- * in which case jsPlumb will use the default options. see documentation.
- */
- $.fn.addEndpoints = function(endpoints) {
- var addedEndpoints = [];
- return this.each(function()
- {
- var e = jsPlumb.addEndpoints($(this).attr("id"), endpoints);
- for (var i = 0; i < e.length; i++) addedEndpoints.push(e[i]);
- });
- return addedEndpoints;
- };
-
- /**
- * remove the endpoint, if it exists, deleting its UI elements etc.
- */
- $.fn.removeEndpoint = function(endpoint) {
- this.each(function()
- {
- jsPlumb.removeEndpoint($(this).attr("id"), endpoint);
- });
- };
-
- })(jQuery);
- /* the library agnostic functions, such as find offset, get id, get attribute, extend etc. currently
- hardcoded to jQuery here; will be extracted to separate impls for different libraries.
- * much more work needs to be done on this. some things that spring to mind: animation, drag, drop.
- *
- * you should _never_ call these methods directly. jsPlumb uses them when it needs them.
- *
- */
- (function() {
-
- jsPlumb.CurrentLibrary = {
-
- /**
- * mapping of drag events for jQuery
- */
- dragEvents : {
- 'start':'start', 'stop':'stop', 'drag':'drag'
- },
-
- /**
- * default drag options for jQuery.
- */
- defaultDragOptions : { opacity:0.5, revert:true, helper:'clone' },
-
- /**
- * wrapper around the library's 'extend' functionality (which it hopefully has.
- * otherwise you'll have to do it yourself). perhaps jsPlumb could do this for you
- * instead. it's not like its hard.
- */
- extend : function(o1, o2) {
- return $.extend(o1, o2);
- },
-
- /**
- * gets an "element object" from the given input. this means an object that is used by the
- * underlying library on which jsPlumb is running. 'el' may already be one of these objects,
- * in which case it is returned as-is. otherwise, 'el' is a String, the library's lookup
- * function is used to find the element, using the given String as the element's id.
- */
- getElementObject : function(el) {
- return typeof(el)=='string' ? $("#" + el) : $(el);
- },
-
- /**
- * gets the offset for the element object. this should return a js object like this:
- *
- * { left:xxx, top: xxx }
- */
- getOffset : function(el) {
- return el.offset();
- },
-
- /**
- * gets the size for the element object, in an array : [ width, height ].
- */
- getSize : function(el) {
- return [el.outerWidth(), el.outerHeight()];
- },
-
- /**
- * gets the named attribute from the given element object.
- */
- getAttribute : function(el, attName) {
- return el.attr(attName);
- },
-
- /**
- * sets the named attribute on the given element object.
- */
- setAttribute : function(el, attName, attValue) {
- el.attr(attName, attValue);
- },
-
- /**
- * adds the given class to the element object.
- */
- addClass : function(el, clazz) {
- el.addClass(clazz);
- },
-
- /**
- * initialises the given element to be draggable.
- */
- initDraggable : function(el, options) {
- if (el.length > 1) alert('poo');
- el.draggable(options);
- },
-
- /**
- * returns whether or not drag is supported (by the library, not whether or not it is disabled) for the given element.
- */
- isDragSupported : function(el, options) {
- return el.draggable;
- },
-
- /**
- * sets the draggable state for the given element
- */
- setDraggable : function(el, draggable) {
- el.draggable("option", "disabled", !draggable);
- },
-
- /**
- * initialises the given element to be droppable.
- */
- initDroppable : function(el, options) {
- el.droppable(options);
- },
-
- /**
- * returns whether or not drop is supported (by the library, not whether or not it is disabled) for the given element.
- */
- isDropSupported : function(el, options) {
- return el.droppable;
- },
-
- /**
- * animates the given element.
- */
- animate : function(el, properties, options) {
- el.animate(properties, options);
- },
-
- /**
- * takes the args passed to an event function and returns you an object that gives the
- * position of the object being moved, as a js object with the same params as the result of
- * getOffset, ie: { left: xxx, top: xxx }.
- *
- * different libraries have different signatures for their event callbacks.
- * see getDragObject as well
- */
- getUIPosition : function(eventArgs) {
- var ui = eventArgs[1];
- return ui.absolutePosition || ui.offset;
- },
-
- /**
- * takes the args passed to an event function and returns you an object representing that which is being dragged.
- */
- getDragObject : function(eventArgs) {
- return eventArgs[1].draggable;
- }
- };
- })();
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