IPython/html/static/widgets/js/widget_image.js

//----------------------------------------------------------------------------
//  Copyright (C) 2013 The IPython Development Team
//
//  Distributed under the terms of the BSD License.  The full license is in
//  the file COPYING, distributed as part of this software.
//----------------------------------------------------------------------------

//============================================================================
// ImageWidget
//============================================================================

/**
 * @module IPython
 * @namespace IPython
 **/

define(["widgets/js/widget"], function(WidgetManager){

    var ImageView = IPython.DOMWidgetView.extend({  
        render : function(){
            // Called when view is rendered.
            this.setElement($("<img />"));
            this.update(); // Set defaults.
        },
        
        update : function(){
            // Update the contents of this view
            //
            // Called when the model is changed.  The model may have been 
            // changed by another view or by a state update from the back-end.
            var image_src = 'data:image/' + this.model.get('format') + ';base64,' + this.model.get('_b64value');
            this.$el.attr('src', image_src);
            
            var width = this.model.get('width');
            if (width !== undefined && width.length > 0) {
                this.$el.attr('width', width);
            } else {
                this.$el.removeAttr('width');
            }
            
            var height = this.model.get('height');
            if (height !== undefined && height.length > 0) {
                this.$el.attr('height', height);
            } else {
                this.$el.removeAttr('height');
            }
            return ImageView.__super__.update.apply(this);
        },
    });
    WidgetManager.register_widget_view('ImageView', ImageView);
});