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4 <title>The source code</title>
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9 <pre class="prettyprint lang-js"><div id="cls-Ext.Slider"></div>/**
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11 * @extends Ext.BoxComponent
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12 * Slider which supports vertical or horizontal orientation, keyboard adjustments,
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13 * configurable snapping, axis clicking and animation. Can be added as an item to
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14 * any container. Example usage:
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17 renderTo: Ext.getBody(),
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26 Ext.Slider = Ext.extend(Ext.BoxComponent, {
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27 <div id="cfg-Ext.Slider-value"></div>/**
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28 * @cfg {Number} value The value to initialize the slider with. Defaults to minValue.
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30 <div id="cfg-Ext.Slider-vertical"></div>/**
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31 * @cfg {Boolean} vertical Orient the Slider vertically rather than horizontally, defaults to false.
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34 <div id="cfg-Ext.Slider-minValue"></div>/**
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35 * @cfg {Number} minValue The minimum value for the Slider. Defaults to 0.
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38 <div id="cfg-Ext.Slider-maxValue"></div>/**
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39 * @cfg {Number} maxValue The maximum value for the Slider. Defaults to 100.
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42 <div id="cfg-Ext.Slider-decimalPrecision."></div>/**
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43 * @cfg {Number/Boolean} decimalPrecision.
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44 * <p>The number of decimal places to which to round the Slider's value. Defaults to 0.</p>
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45 * <p>To disable rounding, configure as <tt><b>false</b></tt>.</p>
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47 decimalPrecision: 0,
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48 <div id="cfg-Ext.Slider-keyIncrement"></div>/**
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49 * @cfg {Number} keyIncrement How many units to change the Slider when adjusting with keyboard navigation. Defaults to 1. If the increment config is larger, it will be used instead.
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52 <div id="cfg-Ext.Slider-increment"></div>/**
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53 * @cfg {Number} increment How many units to change the slider when adjusting by drag and drop. Use this option to enable 'snapping'.
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58 <div id="cfg-Ext.Slider-clickToChange"></div>/**
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59 * @cfg {Boolean} clickToChange Determines whether or not clicking on the Slider axis will change the slider. Defaults to true
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61 clickToChange : true,
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62 <div id="cfg-Ext.Slider-animate"></div>/**
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63 * @cfg {Boolean} animate Turn on or off animation. Defaults to true
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67 <div id="prop-Ext.Slider-dragging"></div>/**
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68 * True while the thumb is in a drag operation
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74 initComponent : function(){
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75 if(!Ext.isDefined(this.value)){
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76 this.value = this.minValue;
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78 Ext.Slider.superclass.initComponent.call(this);
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79 this.keyIncrement = Math.max(this.increment, this.keyIncrement);
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81 <div id="event-Ext.Slider-beforechange"></div>/**
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82 * @event beforechange
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83 * Fires before the slider value is changed. By returning false from an event handler,
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84 * you can cancel the event and prevent the slider from changing.
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85 * @param {Ext.Slider} slider The slider
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86 * @param {Number} newValue The new value which the slider is being changed to.
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87 * @param {Number} oldValue The old value which the slider was previously.
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90 <div id="event-Ext.Slider-change"></div>/**
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92 * Fires when the slider value is changed.
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93 * @param {Ext.Slider} slider The slider
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94 * @param {Number} newValue The new value which the slider has been changed to.
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97 <div id="event-Ext.Slider-changecomplete"></div>/**
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98 * @event changecomplete
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99 * Fires when the slider value is changed by the user and any drag operations have completed.
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100 * @param {Ext.Slider} slider The slider
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101 * @param {Number} newValue The new value which the slider has been changed to.
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104 <div id="event-Ext.Slider-dragstart"></div>/**
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106 * Fires after a drag operation has started.
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107 * @param {Ext.Slider} slider The slider
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108 * @param {Ext.EventObject} e The event fired from Ext.dd.DragTracker
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111 <div id="event-Ext.Slider-drag"></div>/**
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113 * Fires continuously during the drag operation while the mouse is moving.
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114 * @param {Ext.Slider} slider The slider
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115 * @param {Ext.EventObject} e The event fired from Ext.dd.DragTracker
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118 <div id="event-Ext.Slider-dragend"></div>/**
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120 * Fires after the drag operation has completed.
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121 * @param {Ext.Slider} slider The slider
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122 * @param {Ext.EventObject} e The event fired from Ext.dd.DragTracker
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128 Ext.apply(this, Ext.Slider.Vertical);
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132 // private override
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133 onRender : function(){
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135 cls: 'x-slider ' + (this.vertical ? 'x-slider-vert' : 'x-slider-horz'),
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136 cn:{cls:'x-slider-end',cn:{cls:'x-slider-inner',cn:[{cls:'x-slider-thumb'},{tag:'a', cls:'x-slider-focus', href:"#", tabIndex: '-1', hidefocus:'on'}]}}
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138 Ext.Slider.superclass.onRender.apply(this, arguments);
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139 this.endEl = this.el.first();
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140 this.innerEl = this.endEl.first();
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141 this.thumb = this.innerEl.first();
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142 this.halfThumb = (this.vertical ? this.thumb.getHeight() : this.thumb.getWidth())/2;
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143 this.focusEl = this.thumb.next();
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147 // private override
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148 initEvents : function(){
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149 this.thumb.addClassOnOver('x-slider-thumb-over');
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150 this.mon(this.el, {
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152 mousedown: this.onMouseDown,
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153 keydown: this.onKeyDown
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156 this.focusEl.swallowEvent("click", true);
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158 this.tracker = new Ext.dd.DragTracker({
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159 onBeforeStart: this.onBeforeDragStart.createDelegate(this),
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160 onStart: this.onDragStart.createDelegate(this),
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161 onDrag: this.onDrag.createDelegate(this),
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162 onEnd: this.onDragEnd.createDelegate(this),
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166 this.tracker.initEl(this.thumb);
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169 // private override
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170 onMouseDown : function(e){
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174 if(this.clickToChange && e.target != this.thumb.dom){
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175 var local = this.innerEl.translatePoints(e.getXY());
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176 this.onClickChange(local);
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182 onClickChange : function(local){
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183 if(local.top > this.clickRange[0] && local.top < this.clickRange[1]){
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184 this.setValue(Ext.util.Format.round(this.reverseValue(local.left), this.decimalPrecision), undefined, true);
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189 onKeyDown : function(e){
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190 if(this.disabled){e.preventDefault();return;}
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191 var k = e.getKey();
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197 this.setValue(this.maxValue, undefined, true);
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199 this.setValue(this.value+this.keyIncrement, undefined, true);
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206 this.setValue(this.minValue, undefined, true);
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208 this.setValue(this.value-this.keyIncrement, undefined, true);
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212 e.preventDefault();
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217 doSnap : function(value){
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218 if(!(this.increment && value)){
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221 var newValue = value,
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222 inc = this.increment,
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228 }else if(m * 2 < -inc){
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232 return newValue.constrain(this.minValue, this.maxValue);
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236 afterRender : function(){
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237 Ext.Slider.superclass.afterRender.apply(this, arguments);
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238 if(this.value !== undefined){
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239 var v = this.normalizeValue(this.value);
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240 if(v !== this.value){
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242 this.setValue(v, false);
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244 this.moveThumb(this.translateValue(v), false);
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250 getRatio : function(){
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251 var w = this.innerEl.getWidth(),
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252 v = this.maxValue - this.minValue;
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253 return v == 0 ? w : (w/v);
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257 normalizeValue : function(v){
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258 v = this.doSnap(v);
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259 v = Ext.util.Format.round(v, this.decimalPrecision);
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260 v = v.constrain(this.minValue, this.maxValue);
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264 <div id="method-Ext.Slider-setMinValue"></div>/**
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265 * Sets the minimum value for the slider instance. If the current value is less than the
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266 * minimum value, the current value will be changed.
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267 * @param {Number} val The new minimum value
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269 setMinValue : function(val){
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270 this.minValue = val;
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272 if(this.value < val){
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273 this.setValue(val);
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277 <div id="method-Ext.Slider-setMaxValue"></div>/**
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278 * Sets the maximum value for the slider instance. If the current value is more than the
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279 * maximum value, the current value will be changed.
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280 * @param {Number} val The new maximum value
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282 setMaxValue : function(val){
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283 this.maxValue = val;
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285 if(this.value > val){
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286 this.setValue(val);
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290 <div id="method-Ext.Slider-setValue"></div>/**
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291 * Programmatically sets the value of the Slider. Ensures that the value is constrained within
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292 * the minValue and maxValue.
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293 * @param {Number} value The value to set the slider to. (This will be constrained within minValue and maxValue)
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294 * @param {Boolean} animate Turn on or off animation, defaults to true
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296 setValue : function(v, animate, changeComplete){
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297 v = this.normalizeValue(v);
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298 if(v !== this.value && this.fireEvent('beforechange', this, v, this.value) !== false){
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300 this.moveThumb(this.translateValue(v), animate !== false);
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301 this.fireEvent('change', this, v);
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302 if(changeComplete){
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303 this.fireEvent('changecomplete', this, v);
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309 translateValue : function(v){
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310 var ratio = this.getRatio();
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311 return (v * ratio) - (this.minValue * ratio) - this.halfThumb;
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314 reverseValue : function(pos){
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315 var ratio = this.getRatio();
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316 return (pos + (this.minValue * ratio)) / ratio;
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320 moveThumb: function(v, animate){
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321 if(!animate || this.animate === false){
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322 this.thumb.setLeft(v);
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324 this.thumb.shift({left: v, stopFx: true, duration:.35});
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329 focus : function(){
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330 this.focusEl.focus(10);
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334 onBeforeDragStart : function(e){
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335 return !this.disabled;
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339 onDragStart: function(e){
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340 this.thumb.addClass('x-slider-thumb-drag');
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341 this.dragging = true;
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342 this.dragStartValue = this.value;
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343 this.fireEvent('dragstart', this, e);
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347 onDrag: function(e){
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348 var pos = this.innerEl.translatePoints(this.tracker.getXY());
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349 this.setValue(Ext.util.Format.round(this.reverseValue(pos.left), this.decimalPrecision), false);
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350 this.fireEvent('drag', this, e);
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354 onDragEnd: function(e){
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355 this.thumb.removeClass('x-slider-thumb-drag');
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356 this.dragging = false;
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357 this.fireEvent('dragend', this, e);
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358 if(this.dragStartValue != this.value){
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359 this.fireEvent('changecomplete', this, this.value);
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364 onResize : function(w, h){
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365 this.innerEl.setWidth(w - (this.el.getPadding('l') + this.endEl.getPadding('r')));
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367 Ext.Slider.superclass.onResize.apply(this, arguments);
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371 onDisable: function(){
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372 Ext.Slider.superclass.onDisable.call(this);
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373 this.thumb.addClass(this.disabledClass);
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375 //IE breaks when using overflow visible and opacity other than 1.
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376 //Create a place holder for the thumb and display it.
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377 var xy = this.thumb.getXY();
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379 this.innerEl.addClass(this.disabledClass).dom.disabled = true;
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380 if (!this.thumbHolder){
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381 this.thumbHolder = this.endEl.createChild({cls: 'x-slider-thumb ' + this.disabledClass});
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383 this.thumbHolder.show().setXY(xy);
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388 onEnable: function(){
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389 Ext.Slider.superclass.onEnable.call(this);
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390 this.thumb.removeClass(this.disabledClass);
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392 this.innerEl.removeClass(this.disabledClass).dom.disabled = false;
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393 if(this.thumbHolder){
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394 this.thumbHolder.hide();
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401 <div id="method-Ext.Slider-syncThumb"></div>/**
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402 * Synchronizes the thumb position to the proper proportion of the total component width based
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403 * on the current slider {@link #value}. This will be called automatically when the Slider
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404 * is resized by a layout, but if it is rendered auto width, this method can be called from
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405 * another resize handler to sync the Slider if necessary.
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407 syncThumb : function(){
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409 this.moveThumb(this.translateValue(this.value));
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413 <div id="method-Ext.Slider-getValue"></div>/**
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414 * Returns the current value of the slider
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415 * @return {Number} The current value of the slider
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417 getValue : function(){
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422 beforeDestroy : function(){
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423 Ext.destroyMembers(this, 'endEl', 'innerEl', 'thumb', 'halfThumb', 'focusEl', 'tracker', 'thumbHolder');
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424 Ext.Slider.superclass.beforeDestroy.call(this);
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427 Ext.reg('slider', Ext.Slider);
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429 // private class to support vertical sliders
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430 Ext.Slider.Vertical = {
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431 onResize : function(w, h){
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432 this.innerEl.setHeight(h - (this.el.getPadding('t') + this.endEl.getPadding('b')));
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436 getRatio : function(){
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437 var h = this.innerEl.getHeight(),
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438 v = this.maxValue - this.minValue;
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442 moveThumb: function(v, animate){
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443 if(!animate || this.animate === false){
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444 this.thumb.setBottom(v);
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446 this.thumb.shift({bottom: v, stopFx: true, duration:.35});
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450 onDrag: function(e){
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451 var pos = this.innerEl.translatePoints(this.tracker.getXY()),
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452 bottom = this.innerEl.getHeight()-pos.top;
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453 this.setValue(this.minValue + Ext.util.Format.round(bottom/this.getRatio(), this.decimalPrecision), false);
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454 this.fireEvent('drag', this, e);
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457 onClickChange : function(local){
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458 if(local.left > this.clickRange[0] && local.left < this.clickRange[1]){
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459 var bottom = this.innerEl.getHeight() - local.top;
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460 this.setValue(this.minValue + Ext.util.Format.round(bottom/this.getRatio(), this.decimalPrecision), undefined, true);
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