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