b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
84 lines
2.1 KiB
JavaScript
Executable file
84 lines
2.1 KiB
JavaScript
Executable file
define(function(require, exports, module) {
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'use strict';
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/**
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* Dependencies
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*/
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var debug = require('debug')('controller:zoom-bar');
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var ZoomBar = require('views/zoom-bar');
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var bindAll = require('lib/bind-all');
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/**
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* Exports
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*/
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module.exports = function(app) { return new ZoomBarController(app); };
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module.exports.ZoomBarController = ZoomBarController;
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/**
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* Initialize a new `ZoomBarController`
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*
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* @param {App} app
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*/
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function ZoomBarController(app) {
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bindAll(this);
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this.app = app;
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this.camera = app.camera;
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this.createView();
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this.bindEvents();
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this.configureZoomBar();
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debug('initialized');
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}
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ZoomBarController.prototype.createView = function() {
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this.view = this.app.views.zoombar || new ZoomBar();
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this.view.hide();
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this.view.appendTo(this.app.el);
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};
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ZoomBarController.prototype.bindEvents = function() {
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this.view.on('change', this.onChange);
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// TODO: Camera events should be relayed through
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// the app, so that controllers dont' have a
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// hard dependency on each other.
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this.camera.on('zoomconfigured', this.onZoomConfigured);
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this.camera.on('zoomchanged', this.setZoom);
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};
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ZoomBarController.prototype.configureZoomBar = function() {
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var zoomSupported = this.camera.isZoomSupported();
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var zoomEnabled = this.app.settings.zoom.enabled();
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this.enableZoom = zoomSupported && zoomEnabled;
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};
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ZoomBarController.prototype.onChange = function(value) {
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var minimumZoom = this.camera.getMinimumZoom();
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var maximumZoom = this.camera.getMaximumZoom();
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var range = maximumZoom - minimumZoom;
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var zoom = (range * value / 100) + minimumZoom;
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this.camera.setZoom(zoom);
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};
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ZoomBarController.prototype.onZoomConfigured = function(zoom) {
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this.configureZoomBar();
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this.setZoom(zoom);
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this.view.hide();
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};
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ZoomBarController.prototype.setZoom = function(zoom) {
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if (!this.enableZoom) {
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return;
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}
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debug('set zoom');
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var minimumZoom = this.camera.getMinimumZoom();
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var maximumZoom = this.camera.getMaximumZoom();
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var range = maximumZoom - minimumZoom;
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var percent = (zoom - minimumZoom) / range * 100;
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this.view.setValue(percent);
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debug('zoom set');
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};
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});
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