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431 lines
15 KiB
JavaScript
431 lines
15 KiB
JavaScript
/*
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* jQuery UI Slider
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*
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* Copyright (c) 2008 Paul Bakaus
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* Dual licensed under the MIT (MIT-LICENSE.txt)
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* and GPL (GPL-LICENSE.txt) licenses.
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*
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* http://docs.jquery.com/UI/Slider
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*
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* Depends:
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* ui.core.js
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*
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* Revision: $Id: ui.slider.js 5539 2008-05-09 16:48:33Z paul.bakaus $
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*/
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;(function($) {
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$.fn.unwrap = $.fn.unwrap || function(expr) {
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return this.each(function(){
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$(this).parents(expr).eq(0).after(this).remove();
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});
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};
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$.widget("ui.slider", {
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plugins: {},
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ui: function(e) {
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return {
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instance: this,
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options: this.options,
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handle: this.currentHandle,
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value: this.options.axis != "both" || !this.options.axis ? Math.round(this.value(null,this.options.axis == "vertical" ? "y" : "x")) : {
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x: Math.round(this.value(null,"x")),
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y: Math.round(this.value(null,"y"))
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},
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range: this.getRange()
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};
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},
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propagate: function(n,e) {
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$.ui.plugin.call(this, n, [e, this.ui()]);
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this.element.triggerHandler(n == "slide" ? n : "slide"+n, [e, this.ui()], this.options[n]);
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},
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destroy: function() {
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this.element
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.removeClass("ui-slider ui-slider-disabled")
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.removeData("slider")
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.unbind(".slider");
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this.handle
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.unwrap("a")
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.mouse("destroy");
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this.generated && this.generated.remove();
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},
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enable: function() {
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this.element.removeClass("ui-slider-disabled");
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this.disabled = false;
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},
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disable: function() {
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this.element.addClass("ui-slider-disabled");
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this.disabled = true;
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},
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setData: function(key, value) {
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this.options[key] = value;
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if (/min|max|steps/.test(key)) {
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this.initBoundaries();
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}
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},
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init: function() {
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var self = this;
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this.element.addClass("ui-slider");
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this.initBoundaries();
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// Initialize mouse and key events for interaction
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this.handle = $(this.options.handle, this.element);
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if (!this.handle.length) {
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self.handle = self.generated = $(self.options.handles || [0]).map(function() {
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var handle = $("<div/>").addClass("ui-slider-handle").appendTo(self.element);
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if (this.id)
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handle.attr("id", this.id);
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return handle[0];
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});
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}
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var handleclass = function(el) {
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this.element = $(el);
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this.element.data("mouse", this);
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this.options = self.options;
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this.element.bind("mousedown", function() {
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if(self.currentHandle) this.blur(self.currentHandle);
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self.focus(this,1);
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});
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this.mouseInit();
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};
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$.extend(handleclass.prototype, $.ui.mouse, {
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mouseStart: function(e) { return self.start.call(self, e, this.element[0]); },
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mouseStop: function(e) { return self.stop.call(self, e, this.element[0]); },
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mouseDrag: function(e) { return self.drag.call(self, e, this.element[0]); },
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trigger: function(e) { this.mouseDown(e); }
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});
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$(this.handle)
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.each(function() {
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new handleclass(this);
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})
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.wrap('<a href="javascript:void(0)" style="cursor:default;"></a>')
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.parent()
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.bind('focus', function(e) { self.focus(this.firstChild); })
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.bind('blur', function(e) { self.blur(this.firstChild); })
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.bind('keydown', function(e) { self.keydown(e.keyCode, this.firstChild); })
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;
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// Bind the click to the slider itself
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this.element.bind('mousedown.slider', function(e) {
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self.click.apply(self, [e]);
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self.currentHandle.data("mouse").trigger(e);
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self.firstValue = self.firstValue + 1; //This is for always triggering the change event
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});
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// Move the first handle to the startValue
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$.each(this.options.handles || [], function(index, handle) {
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self.moveTo(handle.start, index, true);
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});
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if (!isNaN(this.options.startValue))
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this.moveTo(this.options.startValue, 0, true);
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this.previousHandle = $(this.handle[0]); //set the previous handle to the first to allow clicking before selecting the handle
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if(this.handle.length == 2 && this.options.range) this.createRange();
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},
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initBoundaries: function() {
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var element = this.element[0], o = this.options;
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this.actualSize = { width: this.element.outerWidth() , height: this.element.outerHeight() };
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$.extend(o, {
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axis: o.axis || (element.offsetWidth < element.offsetHeight ? 'vertical' : 'horizontal'),
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max: !isNaN(parseInt(o.max,10)) ? { x: parseInt(o.max, 10), y: parseInt(o.max, 10) } : ({ x: o.max && o.max.x || 100, y: o.max && o.max.y || 100 }),
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min: !isNaN(parseInt(o.min,10)) ? { x: parseInt(o.min, 10), y: parseInt(o.min, 10) } : ({ x: o.min && o.min.x || 0, y: o.min && o.min.y || 0 })
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});
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//Prepare the real maxValue
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o.realMax = {
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x: o.max.x - o.min.x,
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y: o.max.y - o.min.y
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};
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//Calculate stepping based on steps
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o.stepping = {
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x: o.stepping && o.stepping.x || parseInt(o.stepping, 10) || (o.steps ? o.realMax.x/(o.steps.x || parseInt(o.steps, 10) || o.realMax.x) : 0),
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y: o.stepping && o.stepping.y || parseInt(o.stepping, 10) || (o.steps ? o.realMax.y/(o.steps.y || parseInt(o.steps, 10) || o.realMax.y) : 0)
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};
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},
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keydown: function(keyCode, handle) {
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if(/(37|38|39|40)/.test(keyCode)) {
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this.moveTo({
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x: /(37|39)/.test(keyCode) ? (keyCode == 37 ? '-' : '+') + '=' + this.oneStep("x") : 0,
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y: /(38|40)/.test(keyCode) ? (keyCode == 38 ? '-' : '+') + '=' + this.oneStep("y") : 0
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}, handle);
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}
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},
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focus: function(handle,hard) {
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this.currentHandle = $(handle).addClass('ui-slider-handle-active');
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if (hard)
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this.currentHandle.parent()[0].focus();
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},
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blur: function(handle) {
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$(handle).removeClass('ui-slider-handle-active');
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if(this.currentHandle && this.currentHandle[0] == handle) { this.previousHandle = this.currentHandle; this.currentHandle = null; };
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},
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click: function(e) {
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// This method is only used if:
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// - The user didn't click a handle
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// - The Slider is not disabled
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// - There is a current, or previous selected handle (otherwise we wouldn't know which one to move)
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var pointer = [e.pageX,e.pageY];
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var clickedHandle = false;
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this.handle.each(function() {
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if(this == e.target)
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clickedHandle = true;
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});
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if (clickedHandle || this.disabled || !(this.currentHandle || this.previousHandle))
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return;
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// If a previous handle was focussed, focus it again
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if (!this.currentHandle && this.previousHandle)
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this.focus(this.previousHandle, true);
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// propagate only for distance > 0, otherwise propagation is done my drag
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this.offset = this.element.offset();
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this.moveTo({
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y: this.convertValue(e.pageY - this.offset.top - this.currentHandle[0].offsetHeight/2, "y"),
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x: this.convertValue(e.pageX - this.offset.left - this.currentHandle[0].offsetWidth/2, "x")
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}, null, !this.options.distance);
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},
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createRange: function() {
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this.rangeElement = $('<div></div>')
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.addClass('ui-slider-range')
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.css({ position: 'absolute' })
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.appendTo(this.element);
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this.updateRange();
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},
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updateRange: function() {
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var prop = this.options.axis == "vertical" ? "top" : "left";
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var size = this.options.axis == "vertical" ? "height" : "width";
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this.rangeElement.css(prop, parseInt($(this.handle[0]).css(prop),10) + this.handleSize(0, this.options.axis == "vertical" ? "y" : "x")/2);
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this.rangeElement.css(size, parseInt($(this.handle[1]).css(prop),10) - parseInt($(this.handle[0]).css(prop),10));
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},
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getRange: function() {
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return this.rangeElement ? this.convertValue(parseInt(this.rangeElement.css(this.options.axis == "vertical" ? "height" : "width"),10), this.options.axis == "vertical" ? "y" : "x") : null;
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},
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handleIndex: function() {
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return this.handle.index(this.currentHandle[0]);
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},
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value: function(handle, axis) {
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if(this.handle.length == 1) this.currentHandle = this.handle;
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if(!axis) axis = this.options.axis == "vertical" ? "y" : "x";
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var curHandle = $(handle != undefined && handle !== null ? this.handle[handle] || handle : this.currentHandle);
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if(curHandle.data("mouse").sliderValue) {
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return parseInt(curHandle.data("mouse").sliderValue[axis],10);
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} else {
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return parseInt(((parseInt(curHandle.css(axis == "x" ? "left" : "top"),10) / (this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(handle,axis))) * this.options.realMax[axis]) + this.options.min[axis],10);
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}
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},
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convertValue: function(value,axis) {
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return this.options.min[axis] + (value / (this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis))) * this.options.realMax[axis];
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},
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translateValue: function(value,axis) {
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return ((value - this.options.min[axis]) / this.options.realMax[axis]) * (this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis));
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},
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translateRange: function(value,axis) {
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if (this.rangeElement) {
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if (this.currentHandle[0] == this.handle[0] && value >= this.translateValue(this.value(1),axis))
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value = this.translateValue(this.value(1,axis) - this.oneStep(axis), axis);
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if (this.currentHandle[0] == this.handle[1] && value <= this.translateValue(this.value(0),axis))
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value = this.translateValue(this.value(0,axis) + this.oneStep(axis), axis);
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}
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if (this.options.handles) {
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var handle = this.options.handles[this.handleIndex()];
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if (value < this.translateValue(handle.min,axis)) {
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value = this.translateValue(handle.min,axis);
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} else if (value > this.translateValue(handle.max,axis)) {
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value = this.translateValue(handle.max,axis);
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}
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}
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return value;
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},
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translateLimits: function(value,axis) {
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if (value >= this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis))
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value = this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis);
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if (value <= 0)
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value = 0;
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return value;
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},
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handleSize: function(handle,axis) {
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return $(handle != undefined && handle !== null ? this.handle[handle] : this.currentHandle)[0]["offset"+(axis == "x" ? "Width" : "Height")];
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},
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oneStep: function(axis) {
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return this.options.stepping[axis] || 1;
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},
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start: function(e, handle) {
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var o = this.options;
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if(this.disabled) return false;
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// Prepare the outer size
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this.actualSize = { width: this.element.outerWidth() , height: this.element.outerHeight() };
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// This is a especially ugly fix for strange blur events happening on mousemove events
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if (!this.currentHandle)
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this.focus(this.previousHandle, true);
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this.offset = this.element.offset();
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this.handleOffset = this.currentHandle.offset();
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this.clickOffset = { top: e.pageY - this.handleOffset.top, left: e.pageX - this.handleOffset.left };
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this.firstValue = this.value();
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this.propagate('start', e);
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return true;
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},
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stop: function(e) {
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this.propagate('stop', e);
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if (this.firstValue != this.value())
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this.propagate('change', e);
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// This is a especially ugly fix for strange blur events happening on mousemove events
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this.focus(this.currentHandle, true);
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return false;
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},
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drag: function(e, handle) {
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var o = this.options;
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var position = { top: e.pageY - this.offset.top - this.clickOffset.top, left: e.pageX - this.offset.left - this.clickOffset.left};
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if(!this.currentHandle) this.focus(this.previousHandle, true); //This is a especially ugly fix for strange blur events happening on mousemove events
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position.left = this.translateLimits(position.left, "x");
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position.top = this.translateLimits(position.top, "y");
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if (o.stepping.x) {
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var value = this.convertValue(position.left, "x");
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value = Math.round(value / o.stepping.x) * o.stepping.x;
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position.left = this.translateValue(value, "x");
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}
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if (o.stepping.y) {
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var value = this.convertValue(position.top, "y");
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value = Math.round(value / o.stepping.y) * o.stepping.y;
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position.top = this.translateValue(value, "y");
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}
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position.left = this.translateRange(position.left, "x");
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position.top = this.translateRange(position.top, "y");
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if(o.axis != "vertical") this.currentHandle.css({ left: position.left });
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if(o.axis != "horizontal") this.currentHandle.css({ top: position.top });
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//Store the slider's value
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this.currentHandle.data("mouse").sliderValue = {
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x: Math.round(this.convertValue(position.left, "x")) || 0,
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y: Math.round(this.convertValue(position.top, "y")) || 0
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};
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if (this.rangeElement)
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this.updateRange();
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this.propagate('slide', e);
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return false;
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},
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moveTo: function(value, handle, noPropagation) {
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var o = this.options;
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// Prepare the outer size
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this.actualSize = { width: this.element.outerWidth() , height: this.element.outerHeight() };
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//If no handle has been passed, no current handle is available and we have multiple handles, return false
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if (handle == undefined && !this.currentHandle && this.handle.length != 1)
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return false;
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//If only one handle is available, use it
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if (handle == undefined && !this.currentHandle)
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handle = 0;
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if (handle != undefined)
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this.currentHandle = this.previousHandle = $(this.handle[handle] || handle);
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if(value.x !== undefined && value.y !== undefined) {
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var x = value.x, y = value.y;
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} else {
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var x = value, y = value;
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}
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if(x !== undefined && x.constructor != Number) {
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var me = /^\-\=/.test(x), pe = /^\+\=/.test(x);
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if(me || pe) {
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x = this.value(null, "x") + parseInt(x.replace(me ? '=' : '+=', ''), 10);
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} else {
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x = isNaN(parseInt(x, 10)) ? undefined : parseInt(x, 10);
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}
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}
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if(y !== undefined && y.constructor != Number) {
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var me = /^\-\=/.test(y), pe = /^\+\=/.test(y);
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if(me || pe) {
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y = this.value(null, "y") + parseInt(y.replace(me ? '=' : '+=', ''), 10);
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} else {
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y = isNaN(parseInt(y, 10)) ? undefined : parseInt(y, 10);
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}
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}
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if(o.axis != "vertical" && x !== undefined) {
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if(o.stepping.x) x = Math.round(x / o.stepping.x) * o.stepping.x;
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x = this.translateValue(x, "x");
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x = this.translateLimits(x, "x");
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x = this.translateRange(x, "x");
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this.currentHandle.css({ left: x });
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}
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if(o.axis != "horizontal" && y !== undefined) {
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if(o.stepping.y) y = Math.round(y / o.stepping.y) * o.stepping.y;
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y = this.translateValue(y, "y");
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y = this.translateLimits(y, "y");
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y = this.translateRange(y, "y");
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this.currentHandle.css({ top: y });
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}
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if (this.rangeElement)
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this.updateRange();
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//Store the slider's value
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this.currentHandle.data("mouse").sliderValue = {
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x: Math.round(this.convertValue(x, "x")) || 0,
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y: Math.round(this.convertValue(y, "y")) || 0
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};
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if (!noPropagation) {
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this.propagate('start', null);
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this.propagate('stop', null);
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this.propagate('change', null);
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this.propagate("slide", null);
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}
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}
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});
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$.ui.slider.getter = "value";
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$.ui.slider.defaults = {
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handle: ".ui-slider-handle",
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distance: 1
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};
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})(jQuery);
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