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InputNumber.js
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InputNumber.js
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define(['backbone', 'text!./templates/inputNumber.html'],
function (Backbone, inputTemplate) {
return Backbone.View.extend({
events: {},
template: _.template(inputTemplate),
initialize: function(opts) {
_.bindAll(this, 'moveIncrement', 'upIncrement');
var ppfx = opts.ppfx || '';
this.ppfx = ppfx;
this.docEl = $(document);
this.inputCls = ppfx + 'input-number';
this.unitCls = ppfx + 'input-unit';
this.events['click .' + ppfx + 'field-arrow-u'] = 'upArrowClick';
this.events['click .' + ppfx + 'field-arrow-d'] = 'downArrowClick';
this.events['mousedown .' + ppfx + 'field-arrows'] = 'downIncrement';
this.events['change .' + this.inputCls] = 'handleChange';
this.events['change .' + this.unitCls] = 'handleUnitChange';
this.listenTo(this.model, 'change:unit change:value', this.handleModelChange);
this.delegateEvents();
},
/**
* Set value to the model
* @param {string} value
* @param {Object} opts
*/
setValue: function(value, opts) {
var opt = opts || {};
var valid = this.validateInputValue(value, {deepCheck: 1});
var validObj = {value: valid.value};
// If found some unit value
if(valid.unit || valid.force) {
validObj.unit = valid.unit;
}
this.model.set(validObj, opt);
// Generally I get silent when I need to reflect data to view without
// reupdating the target
if(opt.silent) {
this.handleModelChange();
}
},
/**
* Handled when the view is changed
*/
handleChange: function (e) {
e.stopPropagation();
this.setValue(this.getInputEl().value);
},
/**
* Handled when the view is changed
*/
handleUnitChange: function (e) {
e.stopPropagation();
var value = this.getUnitEl().value;
this.model.set('unit', value);
},
/**
* Updates the view when the model is changed
* */
handleModelChange: function() {
var m = this.model;
this.getInputEl().value = m.get('value');
var unit = this.getUnitEl();
if (unit) {
unit.value = m.get('unit');
}
},
/**
* Get the input element
* @return {HTMLElement}
*/
getInputEl: function() {
if(!this.inputEl) {
this.inputEl = $('<input>', {
class: this.inputCls,
placeholder: this.model.get('defaults')
});
}
return this.inputEl.get(0);
},
/**
* Get the unit element
* @return {HTMLElement}
*/
getUnitEl: function() {
if(!this.unitEl) {
var model = this.model;
var units = model.get('units') || [];
if(units.length){
var unitStr = '<select class="' + this.unitCls + '">';
_.each(units, function(unit){
var selected = unit == model.get('unit') ? 'selected': '';
unitStr += '<option ' + selected + ' >' + unit + '</option>';
});
unitStr += '</select>';
this.unitEl = $(unitStr);
}
}
return this.unitEl && this.unitEl.get(0);
},
/**
* Invoked when the up arrow is clicked
* */
upArrowClick: function() {
var value = this.model.get('value');
value = isNaN(value) ? 1 : parseInt(value, 10) + 1;
var valid = this.validateInputValue(value);
this.model.set('value', valid.value);
},
/**
* Invoked when the down arrow is clicked
* */
downArrowClick: function(e){
var value = this.model.get('value');
value = isNaN(value) ? 0 : parseInt(value, 10) - 1;
var valid = this.validateInputValue(value);
this.model.set('value', valid.value);
},
/**
* Change easily integer input value with click&drag method
* @param Event
*
* @return void
* */
downIncrement: function(e) {
e.preventDefault();
this.moved = 0;
var value = this.model.get('value');
value = isNaN(value) ? 0 : parseInt(value, 10);
var current = {y: e.pageY, val: value };
this.docEl.mouseup(current, this.upIncrement);
this.docEl.mousemove(current, this.moveIncrement);
},
/** While the increment is clicked, moving the mouse will update input value
* @param Object
*
* @return bool
* */
moveIncrement: function (ev) {
this.moved = 1;
var pos = parseInt(ev.data.val - ev.pageY + ev.data.y, 10);
this.prValue = this.validateInputValue(pos).value;//Math.max(this.min, Math.min(this.max, pos) );
this.model.set('value', this.prValue, {avoidStore: 1});
return false;
},
/**
* Stop moveIncrement method
* @param Object
*
* @return void
* */
upIncrement: function (e) {
this.docEl.off('mouseup', this.upIncrement);
this.docEl.off('mousemove', this.moveIncrement);
if(this.prValue && this.moved)
this.model.set('value', this.prValue - 1, {silent:1}).set('value', this.prValue + 1);
},
/**
* Validate input value
* @param {String} value Raw value
* @param {Object} opts Options
* @return {Object} Validated string
*/
validateInputValue: function(value, opts) {
var unit = '';
var val = value;
var force = 0;
var opt = opts || {};
var model = this.model;
var max = model.get('max');
var min = model.get('min');
if(opt.deepCheck) {
var fixed = model.get('fixedValues') || [];
if (val) {
// If the value is one of the fixed values I leave it as it is
var regFixed = new RegExp('^' + fixed.join('|'), 'g');
if (fixed.length && regFixed.test(val)) {
val = val.match(regFixed)[0];
unit = '';
force = 1;
} else {
// Make it suitable for replace
val += '';
val = parseFloat(val.replace(',', '.'));
val = !isNaN(val) ? val : model.get('defaults');
var uN = value.replace(val, '');
// Check if exists as unit
if(_.indexOf(model.get('units'), uN) >= 0)
unit = uN;
}
}
}
if(typeof max !== 'undefined')
val = val > max ? max : val;
if(typeof min !== 'undefined')
val = val < min ? min : val;
return {
force: force,
value: val,
unit: unit
};
},
render: function() {
var ppfx = this.ppfx;
this.$el.html(this.template({ppfx: ppfx}));
this.$el.find('.'+ ppfx +'input-holder').html(this.getInputEl());
this.$el.find('.' + ppfx + 'field-units').html(this.getUnitEl());
this.$el.addClass(ppfx + 'field');
return this;
}
});
});