/** * This is a simple way to add an image of any size to your application and have it participate in the layout system * like any other component. This component typically takes between 1 and 3 configurations - a {@link #src}, and * optionally a {@link #height} and a {@link #width}: * * @example * var img = Ext.create('Ext.Img', { * src: 'http://www.sencha.com/assets/images/sencha-avatar-64x64.png', * height: 64, * width: 64 * }); * Ext.Viewport.add(img); * * It's also easy to add an image into a panel or other container using its xtype: * * @example * Ext.create('Ext.Panel', { * fullscreen: true, * layout: 'hbox', * items: [ * { * xtype: 'image', * src: 'http://www.sencha.com/assets/images/sencha-avatar-64x64.png', * flex: 1 * }, * { * xtype: 'panel', * flex: 2, * html: 'Sencha Inc.<br/>1700 Seaport Boulevard Suite 120, Redwood City, CA' * } * ] * }); * * Here we created a panel which contains an image (a profile picture in this case) and a text area to allow the user * to enter profile information about themselves. In this case we used an {@link Ext.layout.HBox hbox layout} and * flexed the image to take up one third of the width and the text area to take two thirds of the width. See the * {@link Ext.layout.HBox hbox docs} for more information on flexing items. */Ext.define('Ext.Img', { extend: 'Ext.Component', xtype: ['image', 'img'], alternateClassName: 'Ext.Image', /** * @event tap * Fires whenever the component is tapped * @param {Ext.Img} this The Image instance * @param {Ext.event.Event} e The event object */ /** * @event load * Fires when the image is loaded * @param {Ext.Img} this The Image instance * @param {Ext.event.Event} e The event object */ /** * @event error * Fires if an error occured when trying to load the image * @param {Ext.Img} this The Image instance * @param {Ext.event.Event} e The event object */ config: { /** * @cfg {String} src The source of this image. See {@link Ext#resolveResource} for * details on locating application resources. * @accessor */ src: null, /** * @cfg {String} imageCls The CSS class to be used when {@link #mode} is not set to 'background' * @accessor */ imageCls : Ext.baseCSSPrefix + 'img-image', /** * @cfg {String} backgroundCls The CSS class to be used when {@link #mode} is set to 'background' * @accessor */ backgroundCls : Ext.baseCSSPrefix + 'img-background', /** * @cfg {String} mode If set to 'background', uses a background-image CSS property instead of an * `<img>` tag to display the image. */ mode: 'background' }, baseCls: Ext.baseCSSPrefix + 'img', beforeInitialize: function() { var me = this; me.onLoad = me.onLoad.bind(me); me.onError = me.onError.bind(me); }, initialize: function() { var me = this; me.callParent(); me.relayEvents(me.renderElement, '*'); me.element.on({ tap: 'onTap', scope: me }); }, hide: function() { var me = this; me.callParent(arguments); me.hiddenSrc = me.hiddenSrc || me.getSrc(); if (!me.isDestroying) { me.setSrc(null); } }, afterShow: function() { this.callParent(arguments); if (this.hiddenSrc) { this.setSrc(this.hiddenSrc); delete this.hiddenSrc; } }, updateMode: function(mode) { var me = this, imageCls = me.getImageCls(), backgroundCls = me.getBackgroundCls(); if (mode === 'background') { if (me.imageElement) { me.imageElement.destroy(); delete me.imageElement; me.updateSrc(me.getSrc()); } me.replaceCls(imageCls, backgroundCls); } else { me.imageElement = me.element.createChild({ tag: 'img' }); me.replaceCls(backgroundCls, imageCls); } }, updateImageCls : function (newCls, oldCls) { this.replaceCls(oldCls, newCls); }, updateBackgroundCls : function (newCls, oldCls) { this.replaceCls(oldCls, newCls); }, onTap: function(e) { this.fireEvent('tap', this, e); }, applySrc: function (src) { return src && Ext.resolveResource(src); }, /** * @private */ updateSrc: function(newSrc) { var me = this, dom; if (me.getMode() === 'background') { dom = this.imageObject || new Image(); } else { dom = me.imageElement.dom; } this.imageObject = dom; dom.setAttribute('src', Ext.isString(newSrc) ? newSrc : ''); dom.addEventListener('load', me.onLoad, false); dom.addEventListener('error', me.onError, false); }, detachListeners: function() { var dom = this.imageObject; if (dom) { dom.removeEventListener('load', this.onLoad, false); dom.removeEventListener('error', this.onError, false); } }, onLoad : function(e) { this.detachListeners(); if (this.getMode() === 'background') { this.element.dom.style.backgroundImage = 'url("' + this.imageObject.src + '")'; } this.fireEvent('load', this, e); }, onError : function(e) { this.detachListeners(); // Attempt to set the src even though the error event fired. if (this.getMode() === 'background') { this.element.dom.style.backgroundImage = 'url("' + this.imageObject.src + '")'; } this.fireEvent('error', this, e); }, updateWidth: function(width) { var sizingElement = (this.getMode() === 'background') ? this.element : this.imageElement; sizingElement.setWidth(width); this.callParent(arguments); }, updateHeight: function(height) { var sizingElement = (this.getMode() === 'background') ? this.element : this.imageElement; sizingElement.setHeight(height); this.callParent(arguments); }, doDestroy: function() { var me = this; me.detachListeners(); me.imageObject = me.imageElement = Ext.destroy(me.imageObject, me.imageElement); me.callParent(); }});