ref: master
plugins/web_odf/public/wodotexteditor-0.5.9/wodotexteditor/widgets/zoomSlider.js
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/** * Copyright (C) 2012-2013 KO GmbH <copyright@kogmbh.com> * * @licstart * This file is part of WebODF. * * WebODF is free software: you can redistribute it and/or modify it * under the terms of the GNU Affero General Public License (GNU AGPL) * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * WebODF is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with WebODF. If not, see <http://www.gnu.org/licenses/>. * @licend * * @source: http://www.webodf.org/ * @source: https://github.com/kogmbh/WebODF/ */ /*global define, require, gui*/ define("webodf/editor/widgets/zoomSlider", [ "dijit/form/HorizontalSlider"], function (HorizontalSlider) { "use strict"; // The slider zooms from -1 to +1, which corresponds // to zoom levels of 1/extremeZoomFactor to extremeZoomFactor. return function ZoomSlider(callback) { var self = this, editorSession, slider, extremeZoomFactor = 4; function updateSlider(zoomLevel) { slider.set('value', Math.log(zoomLevel) / Math.log(extremeZoomFactor), false); } this.setEditorSession = function (session) { var zoomHelper; if (editorSession) { editorSession.getOdfCanvas().getZoomHelper().unsubscribe(gui.ZoomHelper.signalZoomChanged, updateSlider); } editorSession = session; if (editorSession) { zoomHelper = editorSession.getOdfCanvas().getZoomHelper(); zoomHelper.subscribe(gui.ZoomHelper.signalZoomChanged, updateSlider); updateSlider(zoomHelper.getZoomLevel()); } slider.setAttribute('disabled', !editorSession); }; /*jslint emptyblock: true*/ this.onToolDone = function () {}; /*jslint emptyblock: false*/ // init function init() { slider = new HorizontalSlider({ name: 'zoomSlider', disabled: true, value: 0, minimum: -1, maximum: 1, discreteValues: 0.01, intermediateChanges: true, style: { width: '150px', height: '25px', float: 'right' } }); slider.onChange = function (value) { if (editorSession) { editorSession.getOdfCanvas().getZoomHelper().setZoomLevel(Math.pow(extremeZoomFactor, value)); } self.onToolDone(); }; return callback(slider); } init(); }; }); |