101 lines
4.5 KiB
JavaScript
101 lines
4.5 KiB
JavaScript
/*
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* Copyright [2011] [wisemapping]
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*
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* Licensed under WiseMapping Public License, Version 1.0 (the "License").
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* It is basically the Apache License, Version 2.0 (the "License") plus the
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* "powered by wisemapping" text requirement on every single page;
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the license at
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*
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* http://www.wisemapping.org/license
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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mindplot.DragConnector = new Class({
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initialize:function(designerModel, workspace) {
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$assert(designerModel, 'designerModel can not be null');
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$assert(workspace, 'workspace can not be null');
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// this._layoutManager = layoutManager;
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this._designerModel = designerModel;
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this._workspace = workspace;
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},
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checkConnection : function(dragTopic) {
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var topics = this._designerModel.getTopics();
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// Must be disconnected from their current connection ?.
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var mainTopicToMainTopicConnection = this._lookUpForMainTopicToMainTopicConnection(dragTopic);
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var currentConnection = dragTopic.getConnectedToTopic();
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if ($defined(currentConnection)) {
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// MainTopic->MainTopicConnection.
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if (currentConnection.getType() == mindplot.model.INodeModel.MAIN_TOPIC_TYPE) {
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if (mainTopicToMainTopicConnection != currentConnection) {
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dragTopic.disconnect(this._workspace);
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}
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}
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else if (currentConnection.getType() == mindplot.model.INodeModel.CENTRAL_TOPIC_TYPE) {
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// Distance if greater that the allowed.
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var dragXPosition = dragTopic.getPosition().x;
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var currentXPosition = currentConnection.getPosition().x;
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if ($defined(mainTopicToMainTopicConnection)) {
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// I have to change the current connection to a main topic.
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dragTopic.disconnect(this._workspace);
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} else
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if (Math.abs(dragXPosition - currentXPosition) > mindplot.DragConnector.CENTRAL_TO_MAINTOPIC_MAX_HORIZONTAL_DISTANCE) {
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dragTopic.disconnect(this._workspace);
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}
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}
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}
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// Finally, connect nodes ...
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if (!dragTopic.isConnected()) {
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var centralTopic = topics[0];
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if ($defined(mainTopicToMainTopicConnection)) {
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dragTopic.connectTo(mainTopicToMainTopicConnection);
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} else if (Math.abs(dragTopic.getPosition().x - centralTopic.getPosition().x) <= mindplot.DragConnector.CENTRAL_TO_MAINTOPIC_MAX_HORIZONTAL_DISTANCE) {
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dragTopic.connectTo(centralTopic);
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}
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}
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},
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_lookUpForMainTopicToMainTopicConnection : function(dragTopic) {
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var topics = this._designerModel.getTopics();
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var result = null;
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var draggedNode = dragTopic.getDraggedTopic();
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var distance = null;
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// Check MainTopic->MainTopic connection...
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for (var i = 0; i < topics.length; i++) {
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var targetTopic = topics[i];
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var position = dragTopic.getPosition();
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if (targetTopic.getType() != mindplot.model.INodeModel.CENTRAL_TOPIC_TYPE && targetTopic != draggedNode) {
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var canBeConnected = dragTopic.canBeConnectedTo(targetTopic);
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if (canBeConnected) {
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var targetPosition = targetTopic.getPosition();
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var fix = position.y > targetPosition.y;
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var gap = 0;
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if (targetTopic.getChildren().length > 0) {
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gap = Math.abs(targetPosition.y - targetTopic.getChildren()[0].getPosition().y)
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}
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var yDistance = Math.abs(position.y - fix * gap - targetPosition.y);
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if (distance == null || yDistance < distance) {
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result = targetTopic;
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distance = yDistance;
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}
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}
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}
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}
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return result;
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}
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});
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mindplot.DragConnector.CENTRAL_TO_MAINTOPIC_MAX_HORIZONTAL_DISTANCE = 400;
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