jquery-ui/ui/jquery.ui.slider.js

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/*
* jQuery UI Slider @VERSION
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*
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* Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
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* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*
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* http://docs.jquery.com/UI/Slider
*
* Depends:
* jquery.ui.core.js
* jquery.ui.mouse.js
* jquery.ui.widget.js
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*/
(function($) {
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// number of pages in a slider
// (how many times can you page up/down to go through the whole range)
var numPages = 5;
$.widget("ui.slider", $.ui.mouse, {
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widgetEventPrefix: "slide",
options: {
animate: false,
distance: 0,
max: 100,
min: 0,
orientation: 'horizontal',
range: false,
step: 1,
value: 0,
values: null
},
_create: function() {
var self = this, o = this.options;
this._keySliding = false;
this._mouseSliding = false;
this._animateOff = true;
this._handleIndex = null;
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this._detectOrientation();
this._mouseInit();
this.element
.addClass("ui-slider"
+ " ui-slider-" + this.orientation
+ " ui-widget"
+ " ui-widget-content"
+ " ui-corner-all");
if (o.disabled) {
this.element.addClass('ui-slider-disabled ui-disabled');
}
this.range = $([]);
if (o.range) {
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if (o.range === true) {
this.range = $('<div></div>');
if (!o.values) o.values = [this._valueMin(), this._valueMin()];
if (o.values.length && o.values.length != 2) {
o.values = [o.values[0], o.values[0]];
}
} else {
this.range = $('<div></div>');
}
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this.range
.appendTo(this.element)
.addClass("ui-slider-range");
if (o.range == "min" || o.range == "max") {
this.range.addClass("ui-slider-range-" + o.range);
}
// note: this isn't the most fittingly semantic framework class for this element,
// but worked best visually with a variety of themes
this.range.addClass("ui-widget-header");
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}
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if ($(".ui-slider-handle", this.element).length == 0)
$('<a href="#"></a>')
.appendTo(this.element)
.addClass("ui-slider-handle");
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if (o.values && o.values.length) {
while ($(".ui-slider-handle", this.element).length < o.values.length)
$('<a href="#"></a>')
.appendTo(this.element)
.addClass("ui-slider-handle");
}
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this.handles = $(".ui-slider-handle", this.element)
.addClass("ui-state-default"
+ " ui-corner-all");
this.handle = this.handles.eq(0);
this.handles.add(this.range).filter("a")
.click(function(event) {
event.preventDefault();
})
.hover(function() {
if (!o.disabled) {
$(this).addClass('ui-state-hover');
}
}, function() {
$(this).removeClass('ui-state-hover');
})
.focus(function() {
if (!o.disabled) {
$(".ui-slider .ui-state-focus").removeClass('ui-state-focus'); $(this).addClass('ui-state-focus');
} else {
$(this).blur();
}
})
.blur(function() {
$(this).removeClass('ui-state-focus');
});
this.handles.each(function(i) {
$(this).data("index.ui-slider-handle", i);
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});
this.handles.keydown(function(event) {
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var ret = true;
var index = $(this).data("index.ui-slider-handle");
if (self.options.disabled)
return;
switch (event.keyCode) {
case $.ui.keyCode.HOME:
case $.ui.keyCode.END:
case $.ui.keyCode.PAGE_UP:
case $.ui.keyCode.PAGE_DOWN:
case $.ui.keyCode.UP:
case $.ui.keyCode.RIGHT:
case $.ui.keyCode.DOWN:
case $.ui.keyCode.LEFT:
ret = false;
if (!self._keySliding) {
self._keySliding = true;
$(this).addClass("ui-state-active");
self._start(event, index);
}
break;
}
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var curVal, newVal, step = self._step();
if (self.options.values && self.options.values.length) {
curVal = newVal = self.values(index);
} else {
curVal = newVal = self.value();
}
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switch (event.keyCode) {
case $.ui.keyCode.HOME:
newVal = self._valueMin();
break;
case $.ui.keyCode.END:
newVal = self._valueMax();
break;
case $.ui.keyCode.PAGE_UP:
newVal = curVal + ((self._valueMax() - self._valueMin()) / numPages);
break;
case $.ui.keyCode.PAGE_DOWN:
newVal = curVal - ((self._valueMax() - self._valueMin()) / numPages);
break;
case $.ui.keyCode.UP:
case $.ui.keyCode.RIGHT:
if(curVal == self._valueMax()) return;
newVal = curVal + step;
break;
case $.ui.keyCode.DOWN:
case $.ui.keyCode.LEFT:
if(curVal == self._valueMin()) return;
newVal = curVal - step;
break;
}
self._slide(event, index, newVal);
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return ret;
}).keyup(function(event) {
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var index = $(this).data("index.ui-slider-handle");
if (self._keySliding) {
self._keySliding = false;
self._stop(event, index);
self._change(event, index);
$(this).removeClass("ui-state-active");
}
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});
this._refreshValue();
this._animateOff = false;
},
destroy: function() {
this.handles.remove();
this.range.remove();
this.element
.removeClass("ui-slider"
+ " ui-slider-horizontal"
+ " ui-slider-vertical"
+ " ui-slider-disabled"
+ " ui-widget"
+ " ui-widget-content"
+ " ui-corner-all")
.removeData("slider")
.unbind(".slider");
this._mouseDestroy();
return this;
},
_mouseCapture: function(event) {
var o = this.options;
if (o.disabled)
return false;
this.elementSize = {
width: this.element.outerWidth(),
height: this.element.outerHeight()
};
this.elementOffset = this.element.offset();
var position = { x: event.pageX, y: event.pageY };
var normValue = this._normValueFromMouse(position);
var distance = this._valueMax() - this._valueMin() + 1, closestHandle;
var self = this, index;
this.handles.each(function(i) {
var thisDistance = Math.abs(normValue - self.values(i));
if (distance > thisDistance) {
distance = thisDistance;
closestHandle = $(this);
index = i;
}
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});
// workaround for bug #3736 (if both handles of a range are at 0,
// the first is always used as the one with least distance,
// and moving it is obviously prevented by preventing negative ranges)
if(o.range == true && this.values(1) == o.min) {
closestHandle = $(this.handles[++index]);
}
this._start(event, index);
this._mouseSliding = true;
self._handleIndex = index;
closestHandle
.addClass("ui-state-active")
.focus();
var offset = closestHandle.offset();
var mouseOverHandle = !$(event.target).parents().andSelf().is('.ui-slider-handle');
this._clickOffset = mouseOverHandle ? { left: 0, top: 0 } : {
left: event.pageX - offset.left - (closestHandle.width() / 2),
top: event.pageY - offset.top
- (closestHandle.height() / 2)
- (parseInt(closestHandle.css('borderTopWidth'),10) || 0)
- (parseInt(closestHandle.css('borderBottomWidth'),10) || 0)
+ (parseInt(closestHandle.css('marginTop'),10) || 0)
};
normValue = this._normValueFromMouse(position);
this._slide(event, index, normValue);
this._animateOff = true;
return true;
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},
_mouseStart: function(event) {
return true;
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},
_mouseDrag: function(event) {
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var position = { x: event.pageX, y: event.pageY };
var normValue = this._normValueFromMouse(position);
this._slide(event, this._handleIndex, normValue);
return false;
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},
_mouseStop: function(event) {
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this.handles.removeClass("ui-state-active");
this._mouseSliding = false;
this._stop(event, this._handleIndex);
this._change(event, this._handleIndex);
this._handleIndex = null;
this._clickOffset = null;
this._animateOff = false;
return false;
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},
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_detectOrientation: function() {
this.orientation = this.options.orientation == 'vertical' ? 'vertical' : 'horizontal';
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},
_normValueFromMouse: function(position) {
var pixelTotal, pixelMouse;
if ('horizontal' == this.orientation) {
pixelTotal = this.elementSize.width;
pixelMouse = position.x - this.elementOffset.left - (this._clickOffset ? this._clickOffset.left : 0);
} else {
pixelTotal = this.elementSize.height;
pixelMouse = position.y - this.elementOffset.top - (this._clickOffset ? this._clickOffset.top : 0);
}
var percentMouse = (pixelMouse / pixelTotal);
if (percentMouse > 1) percentMouse = 1;
if (percentMouse < 0) percentMouse = 0;
if ('vertical' == this.orientation)
percentMouse = 1 - percentMouse;
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var valueTotal = this._valueMax() - this._valueMin(),
valueMouse = percentMouse * valueTotal,
valueMouseModStep = valueMouse % this.options.step,
normValue = this._valueMin() + valueMouse - valueMouseModStep;
if (valueMouseModStep > (this.options.step / 2))
normValue += this.options.step;
// Since JavaScript has problems with large floats, round
// the final value to 5 digits after the decimal point (see #4124)
return parseFloat(normValue.toFixed(5));
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},
_start: function(event, index) {
var uiHash = {
handle: this.handles[index],
value: this.value()
};
if (this.options.values && this.options.values.length) {
uiHash.value = this.values(index);
uiHash.values = this.values();
}
this._trigger("start", event, uiHash);
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},
_slide: function(event, index, newVal) {
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var handle = this.handles[index];
if (this.options.values && this.options.values.length) {
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var otherVal = this.values(index ? 0 : 1);
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if ((this.options.values.length == 2 && this.options.range === true) &&
((index == 0 && newVal > otherVal) || (index == 1 && newVal < otherVal))){
newVal = otherVal;
}
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if (newVal != this.values(index)) {
var newValues = this.values();
newValues[index] = newVal;
// A slide can be canceled by returning false from the slide callback
var allowed = this._trigger("slide", event, {
handle: this.handles[index],
value: newVal,
values: newValues
});
var otherVal = this.values(index ? 0 : 1);
if (allowed !== false) {
this.values(index, newVal, true);
}
}
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} else {
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if (newVal != this.value()) {
// A slide can be canceled by returning false from the slide callback
var allowed = this._trigger("slide", event, {
handle: this.handles[index],
value: newVal
});
if (allowed !== false) {
this.value(newVal);
}
}
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}
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},
_stop: function(event, index) {
var uiHash = {
handle: this.handles[index],
value: this.value()
};
if (this.options.values && this.options.values.length) {
uiHash.value = this.values(index);
uiHash.values = this.values();
}
this._trigger("stop", event, uiHash);
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},
_change: function(event, index) {
if (!this._keySliding && !this._mouseSliding) {
var uiHash = {
handle: this.handles[index],
value: this.value()
};
if (this.options.values && this.options.values.length) {
uiHash.value = this.values(index);
uiHash.values = this.values();
}
this._trigger("change", event, uiHash);
}
},
value: function(newValue) {
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if (arguments.length) {
this.options.value = this._trimValue(newValue);
this._refreshValue();
this._change(null, 0);
}
return this._value();
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},
values: function(index, newValue) {
if (arguments.length > 1) {
this.options.values[index] = this._trimValue(newValue);
this._refreshValue();
this._change(null, index);
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}
if (arguments.length) {
if ($.isArray(arguments[0])) {
var vals = this.options.values, newValues = arguments[0];
for (var i = 0, l = vals.length; i < l; i++) {
vals[i] = this._trimValue(newValues[i]);
this._change(null, i);
}
this._refreshValue();
} else {
if (this.options.values && this.options.values.length) {
return this._values(index);
} else {
return this.value();
}
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}
} else {
return this._values();
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}
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},
_setOption: function(key, value) {
var i,
valsLength = 0;
if ( jQuery.isArray(this.options.values) ) {
valsLength = this.options.values.length;
};
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$.Widget.prototype._setOption.apply(this, arguments);
switch (key) {
case 'disabled':
if (value) {
this.handles.filter(".ui-state-focus").blur();
this.handles.removeClass("ui-state-hover");
this.handles.attr("disabled", "disabled");
this.element.addClass("ui-disabled");
} else {
this.handles.removeAttr("disabled");
this.element.removeClass("ui-disabled");
}
case 'orientation':
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this._detectOrientation();
this.element
.removeClass("ui-slider-horizontal ui-slider-vertical")
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.addClass("ui-slider-" + this.orientation);
this._refreshValue();
break;
case 'value':
this._animateOff = true;
this._refreshValue();
this._change(null, 0);
this._animateOff = false;
break;
case 'values':
this._animateOff = true;
this._refreshValue();
for (i = 0; i < valsLength; i++) {
this._change(null, i);
}
this._animateOff = false;
break;
}
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},
_step: function() {
var step = this.options.step;
return step;
},
_value: function() {
//internal value getter
// _value() returns value trimmed by min and max
var val = this.options.value;
val = this._trimValue(val);
return val;
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},
_values: function(index) {
//internal values getter
// _values() returns array of values trimmed by min and max
// _values(index) returns single value trimmed by min and max
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if (arguments.length) {
var val = this.options.values[index];
val = this._trimValue(val);
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return val;
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} else {
// .slice() creates a copy of the array
// this copy gets trimmed by min and max and then returned
var vals = this.options.values.slice();
for (var i = 0, l = vals.length; i < l; i++) {
vals[i] = this._trimValue(vals[i]);
}
return vals;
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}
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},
_trimValue: function(val) {
if (val < this._valueMin()) val = this._valueMin();
if (val > this._valueMax()) val = this._valueMax();
return val;
},
_valueMin: function() {
var valueMin = this.options.min;
return valueMin;
},
_valueMax: function() {
var valueMax = this.options.max;
return valueMax;
},
_refreshValue: function() {
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var oRange = this.options.range, o = this.options, self = this;
var animate = (!this._animateOff) ? o.animate : false;
if (this.options.values && this.options.values.length) {
var vp0, vp1;
this.handles.each(function(i, j) {
var valPercent = (self.values(i) - self._valueMin()) / (self._valueMax() - self._valueMin()) * 100;
var _set = {}; _set[self.orientation == 'horizontal' ? 'left' : 'bottom'] = valPercent + '%';
$(this).stop(1,1)[animate ? 'animate' : 'css'](_set, o.animate);
if (self.options.range === true) {
if (self.orientation == 'horizontal') {
(i == 0) && self.range.stop(1,1)[animate ? 'animate' : 'css']({ left: valPercent + '%' }, o.animate);
(i == 1) && self.range[animate ? 'animate' : 'css']({ width: (valPercent - lastValPercent) + '%' }, { queue: false, duration: o.animate });
} else {
(i == 0) && self.range.stop(1,1)[animate ? 'animate' : 'css']({ bottom: (valPercent) + '%' }, o.animate);
(i == 1) && self.range[animate ? 'animate' : 'css']({ height: (valPercent - lastValPercent) + '%' }, { queue: false, duration: o.animate });
}
}
lastValPercent = valPercent;
});
} else {
var value = this.value(),
valueMin = this._valueMin(),
valueMax = this._valueMax(),
valPercent = valueMax != valueMin
? (value - valueMin) / (valueMax - valueMin) * 100
: 0;
var _set = {}; _set[self.orientation == 'horizontal' ? 'left' : 'bottom'] = valPercent + '%';
this.handle.stop(1,1)[animate ? 'animate' : 'css'](_set, o.animate);
(oRange == "min") && (this.orientation == "horizontal") && this.range.stop(1,1)[animate ? 'animate' : 'css']({ width: valPercent + '%' }, o.animate);
(oRange == "max") && (this.orientation == "horizontal") && this.range[animate ? 'animate' : 'css']({ width: (100 - valPercent) + '%' }, { queue: false, duration: o.animate });
(oRange == "min") && (this.orientation == "vertical") && this.range.stop(1,1)[animate ? 'animate' : 'css']({ height: valPercent + '%' }, o.animate);
(oRange == "max") && (this.orientation == "vertical") && this.range[animate ? 'animate' : 'css']({ height: (100 - valPercent) + '%' }, { queue: false, duration: o.animate });
}
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}
});
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$.extend($.ui.slider, {
version: "@VERSION"
});
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})(jQuery);