var FloatTextView = IPython.WidgetView.extend({ // Called when view is rendered. render : function(){ this.$el .html('') .addClass(this.model.comm.comm_id); this.$textbox = $('') .addClass('input') .appendTo(this.$el); this.update(); // Set defaults. }, // Handles: Backend -> Frontend Sync // Frontent -> Frontend Sync update : function(){ var value = this.model.get('value'); if (!this.changing && parseFloat(this.$textbox.val()) != value) { this.$textbox.val(value); } if (this.model.get('disabled')) { this.$textbox.attr('disabled','disabled'); } else { this.$textbox.removeAttr('disabled'); } }, events: {"keyup input" : "handleChanging", "paste input" : "handleChanging", "cut input" : "handleChanging", "change input" : "handleChanged"}, // Fires only when control is validated or looses focus. // Handles and validates user input. handleChanging: function(e) { // Try to parse value as a float. var numericalValue = 0.0; if (e.target.value != '') { numericalValue = parseFloat(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)) { numericalValue = Math.min(this.model.get('max'), numericalValue); numericalValue = Math.max(this.model.get('min'), numericalValue); // Apply the value if it has changed. if (numericalValue != this.model.get('value')) { this.changing = true; this.model.set('value', numericalValue); this.model.apply(this); this.changing = false; } } }, // Applies validated input. handleChanged: function(e) { // Update the textbox if (this.model.get('value') != e.target.value) { e.target.value = this.model.get('value'); } } }); IPython.notebook.widget_manager.register_widget_view('FloatTextView', FloatTextView);