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