/* * Copyright [2011] [wisemapping] * * Licensed under WiseMapping Public License, Version 1.0 (the "License"). * It is basically the Apache License, Version 2.0 (the "License") plus the * "powered by wisemapping" text requirement on every single page; * you may not use this file except in compliance with the License. * You may obtain a copy of the license at * * http://www.wisemapping.org/license * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ mindplot.DragConnector = new Class({ initialize:function (designerModel, workspace) { $assert(designerModel, 'designerModel can not be null'); $assert(workspace, 'workspace can not be null'); // this._layoutManager = layoutManager; this._designerModel = designerModel; this._workspace = workspace; }, checkConnection:function (dragTopic) { var topics = this._designerModel.getTopics(); // Must be disconnected from their current connection ?. var candidates = this._searchConnectionCandidates(dragTopic); var currentConnection = dragTopic.getConnectedToTopic(); if (currentConnection && (candidates.length == 0 || candidates[0] != currentConnection)) { dragTopic.disconnect(this._workspace); } // Finally, connect nodes ... if (!dragTopic.isConnected() && candidates.length > 0) { dragTopic.connectTo(candidates[0]); } }, _searchConnectionCandidates:function (dragTopic) { var topics = this._designerModel.getTopics(); var draggedNode = dragTopic.getDraggedTopic(); // Drag node connects to the border ... var dragTopicWidth = dragTopic.getSize ? dragTopic.getSize().width : 0; // Hack... var xMouseGap = dragTopic.getPosition().x > 0 ? 0 : dragTopicWidth; var sPos = {x:dragTopic.getPosition().x - xMouseGap, y:dragTopic.getPosition().y}; // Perform a initial filter to discard topics: // - Exclude dragged topic // - Exclude dragTopic pivot // - Nodes that are collapsed topics = topics.filter(function (topic) { return draggedNode != topic && topic != dragTopic._draggedNode && !topic.areChildrenShrunken() && !topic.isCollapsed(); }); // Filter all the nodes that are outside the vertical boundary: // * The node is to out of the x scope // * The x distance greater the vertical tolerated distance topics = topics.filter(function (topic) { var tpos = topic.getPosition(); // Center topic has different alignment than the rest of the nodes. That's why i need to divide it by two... var txborder = tpos.x + (topic.getSize().width / 2) * Math.sign(sPos.x); var distance = (sPos.x - txborder) * Math.sign(sPos.x); return distance > 0 && (distance < mindplot.DragConnector.MAX_VERTICAL_CONNECTION_TOLERANCE); }); // Assign a priority based on the distance: // - Alignment with the targetNode // - Vertical distance // - Horizontal proximity topics = topics.sort(function (a, b) { var aPos = a.getPosition(); var bPos = b.getPosition(); var av = this._isVerticallyAligned(a.getSize(), a.getPosition(), sPos); var bv = this._isVerticallyAligned(b.getSize(), b.getPosition(), sPos); return ((av ? 1 : 10000) + Math.abs(aPos.x - sPos.x) + Math.abs(aPos.y - sPos.y)) - ((bv ? 1 : 10000) + Math.abs(bPos.x - sPos.x) + Math.abs(bPos.y - sPos.y)); }.bind(this)); return topics; }, _isVerticallyAligned:function (targetSize, targetPosition, sourcePosition) { return (sourcePosition.y - targetPosition.y) < targetSize.height; } }); mindplot.DragConnector.MAX_VERTICAL_CONNECTION_TOLERANCE = 80;