The value of slider changes in frontend, and readout, but not in python obj.

IPython/html/static/widgets/js/widget_int.js

@@ -1,304 +1,309 b''
 // Copyright (c) IPython Development Team.
 // Distributed under the terms of the Modified BSD License.
 
 define([
     "widgets/js/widget",
     "jqueryui",
     "components/bootstrap/js/bootstrap.min",
 ], function(widget, $){
     
     var IntSliderView = widget.DOMWidgetView.extend({
         render : function(){
             // Called when view is rendered.
             this.$el
                 .addClass('widget-hbox-single');
             this.$label = $('<div />')
                 .appendTo(this.$el)
                 .addClass('widget-hlabel')
                 .hide();
             
             this.$slider = $('<div />')
                 .slider({})
                 .addClass('slider');
             // Put the slider in a container 
             this.$slider_container = $('<div />')
                 .addClass('widget-hslider')
                 .append(this.$slider);
             this.$el_to_style = this.$slider_container; // Set default element to style
             this.$el.append(this.$slider_container);
             
             this.$readout = $('<div/>')
                 .appendTo(this.$el)
                 .addClass('widget-hreadout')
                 .hide();
             
             // Set defaults.
             this.update();
         },
         
         update : function(options){
             // 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.
             if (options === undefined || options.updated_view != this) {
                 // JQuery slider option keys.  These keys happen to have a
                 // one-to-one mapping with the corrosponding keys of the model.
                 var jquery_slider_keys = ['step', 'max', 'min', 'disabled'];
                 var that = this;
                 that.$slider.slider({});
                 _.each(jquery_slider_keys, function(key, i) {
                     var model_value = that.model.get(key);
                     if (model_value !== undefined) {
                         that.$slider.slider("option", key, model_value);
                     }
                 });
 
                 // WORKAROUND FOR JQUERY SLIDER BUG.
                 // The horizontal position of the slider handle
                 // depends on the value of the slider at the time
                 // of orientation change.  Before applying the new
                 // workaround, we set the value to the minimum to
                 // make sure that the horizontal placement of the
                 // handle in the vertical slider is always 
                 // consistent.
                 var orientation = this.model.get('orientation');
                 var min = this.model.get('min');
                 var max = this.model.get('max');
                 this.$slider.slider('option', 'value', min);
                 this.$slider.slider('option', 'orientation', orientation);
                 value = this.model.get('value');
-                if(value > max) value = max;
-                else if(value < min) value = min;
+                if(value > max) { 
+                    value = max; 
+                }
+                else if(value < min){ 
+                    value = min; 
+                }
+                this.model.set('value', value, {updated_view: this});
                 this.$slider.slider('option', 'value', value);
                 this.$readout.text(value);
 
                 // Use the right CSS classes for vertical & horizontal sliders
                 if (orientation=='vertical') {
                     this.$slider_container
                         .removeClass('widget-hslider')
                         .addClass('widget-vslider');
                     this.$el
                         .removeClass('widget-hbox-single')
                         .addClass('widget-vbox-single');
                     this.$label
                         .removeClass('widget-hlabel')
                         .addClass('widget-vlabel');
                     this.$readout
                         .removeClass('widget-hreadout')
                         .addClass('widget-vreadout');
 
                 } else {
                     this.$slider_container
                         .removeClass('widget-vslider')
                         .addClass('widget-hslider');
                     this.$el
                         .removeClass('widget-vbox-single')
                         .addClass('widget-hbox-single');
                     this.$label
                         .removeClass('widget-vlabel')
                         .addClass('widget-hlabel');
                     this.$readout
                         .removeClass('widget-vreadout')
                         .addClass('widget-hreadout');
                 }
 
                 var description = this.model.get('description');
                 if (description.length === 0) {
                     this.$label.hide();
                 } else {
                     this.$label.text(description);
                     MathJax.Hub.Queue(["Typeset",MathJax.Hub,this.$label.get(0)]);
                     this.$label.show();
                 }
                 
                 var readout = this.model.get('readout');
                 if (readout) {
                     this.$readout.show();
                 } else {
                     this.$readout.hide();
                 }
             }
             return IntSliderView.__super__.update.apply(this);
         },
         
         events: {
             // Dictionary of events and their handlers.
             "slide" : "handleSliderChange"
         }, 
 
         handleSliderChange: function(e, ui) { 
             // Called when the slider value is changed.
 
             // Calling model.set will trigger all of the other views of the 
             // model to update.
             var actual_value = this._validate_slide_value(ui.value);
             this.model.set('value', actual_value, {updated_view: this});
             this.$readout.text(actual_value);
             this.touch();
         },
 
         _validate_slide_value: function(x) {
             // Validate the value of the slider before sending it to the back-end
             // and applying it to the other views on the page.
 
             // Double bit-wise not truncates the decimel (int cast).
             return ~~x;
         },
     });
 
 
     var IntTextView = widget.DOMWidgetView.extend({    
         render : function(){
             // Called when view is rendered.
             this.$el
                 .addClass('widget-hbox-single');
             this.$label = $('<div />')
                 .appendTo(this.$el)
                 .addClass('widget-hlabel')
                 .hide();
             this.$textbox = $('<input type="text" />')
                 .addClass('form-control')
                 .addClass('widget-numeric-text')
                 .appendTo(this.$el);
             this.$el_to_style = this.$textbox; // Set default element to style
             this.update(); // Set defaults.
         },
         
         update : function(options){
             // 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.
             if (options === undefined || options.updated_view != this) {
                 var value = this.model.get('value');
                 if (this._parse_value(this.$textbox.val()) != value) {
                     this.$textbox.val(value);
                 }
                 
                 if (this.model.get('disabled')) {
                     this.$textbox.attr('disabled','disabled');
                 } else {
                     this.$textbox.removeAttr('disabled');
                 }
 
                 var description = this.model.get('description');
                 if (description.length === 0) {
                     this.$label.hide();
                 } else {
                     this.$label.text(description);
                     MathJax.Hub.Queue(["Typeset",MathJax.Hub,this.$label.get(0)]);
                     this.$label.show();
                 }
             }
             return IntTextView.__super__.update.apply(this);
         },
 
         events: {
             // Dictionary of events and their handlers.
             "keyup input"  : "handleChanging",
             "paste input"  : "handleChanging",
             "cut input"    : "handleChanging",
 
             // Fires only when control is validated or looses focus.
             "change input" : "handleChanged"
         }, 
         
         handleChanging: function(e) { 
             // Handles and validates user input.
             
             // Try to parse value as a int.
             var numericalValue = 0;
             if (e.target.value !== '') {
                 var trimmed = e.target.value.trim();
                 if (!(['-', '-.', '.', '+.', '+'].indexOf(trimmed) >= 0)) {
                     numericalValue = this._parse_value(e.target.value);    
                 }                
             }
             
             // If parse failed, reset value to value stored in model.
             if (isNaN(numericalValue)) {
                 e.target.value = this.model.get('value');
             } else if (!isNaN(numericalValue)) {
                 if (this.model.get('max') !== undefined) {
                     numericalValue = Math.min(this.model.get('max'), numericalValue);
                 }
                 if (this.model.get('min') !== undefined) {
                     numericalValue = Math.max(this.model.get('min'), numericalValue);
                 }
                 
                 // Apply the value if it has changed.
                 if (numericalValue != this.model.get('value')) {
             
                     // Calling model.set will trigger all of the other views of the 
                     // model to update.
                     this.model.set('value', numericalValue, {updated_view: this});
                     this.touch();
                 }
             }
         },
         
         handleChanged: function(e) {
             // Applies validated input.
             if (this.model.get('value') != e.target.value) {
                 e.target.value = this.model.get('value');
             }
         },
 
         _parse_value: function(value) {
             // Parse the value stored in a string.
             return  parseInt(value);
         },
     });
 
 
     var ProgressView = widget.DOMWidgetView.extend({
         render : function(){
             // Called when view is rendered.
             this.$el
                 .addClass('widget-hbox-single');
             this.$label = $('<div />')
                 .appendTo(this.$el)
                 .addClass('widget-hlabel')
                 .hide();
             this.$progress = $('<div />')
                 .addClass('progress')
                 .addClass('widget-progress')
                 .appendTo(this.$el);
             this.$el_to_style = this.$progress; // Set default element to style
             this.$bar = $('<div />')
                 .addClass('progress-bar')
                 .css('width', '50%')
                 .appendTo(this.$progress);
             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 value = this.model.get('value');
             var max = this.model.get('max');
             var min = this.model.get('min');
             var percent = 100.0 * (value - min) / (max - min);
             this.$bar.css('width', percent + '%');
             
             var description = this.model.get('description');
             if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.text(description);
                 MathJax.Hub.Queue(["Typeset",MathJax.Hub,this.$label.get(0)]);
                 this.$label.show();
             }
             return ProgressView.__super__.update.apply(this);
         }, 
     });
 
     return {
         'IntSliderView': IntSliderView, 
         'IntTextView': IntTextView,
         'ProgressView': ProgressView,
     };
 });