Slider.js
资源名称:ext-3.1.0.zip [点击查看]
上传用户:dawnssy
上传日期:2022-08-06
资源大小:9345k
文件大小:14k
源码类别:
JavaScript
开发平台:
JavaScript
- /*! * Ext JS Library 3.1.0 * Copyright(c) 2006-2009 Ext JS, LLC * licensing@extjs.com * http://www.extjs.com/license */ /**
- * @class Ext.Slider
- * @extends Ext.BoxComponent
- * Slider which supports vertical or horizontal orientation, keyboard adjustments,
- * configurable snapping, axis clicking and animation. Can be added as an item to
- * any container. Example usage:
- <pre><code>
- new Ext.Slider({
- renderTo: Ext.getBody(),
- width: 200,
- value: 50,
- increment: 10,
- minValue: 0,
- maxValue: 100
- });
- </code></pre>
- */
- Ext.Slider = Ext.extend(Ext.BoxComponent, {
- /**
- * @cfg {Number} value The value to initialize the slider with. Defaults to minValue.
- */
- /**
- * @cfg {Boolean} vertical Orient the Slider vertically rather than horizontally, defaults to false.
- */
- vertical: false,
- /**
- * @cfg {Number} minValue The minimum value for the Slider. Defaults to 0.
- */
- minValue: 0,
- /**
- * @cfg {Number} maxValue The maximum value for the Slider. Defaults to 100.
- */
- maxValue: 100,
- /**
- * @cfg {Number/Boolean} decimalPrecision.
- * <p>The number of decimal places to which to round the Slider's value. Defaults to 0.</p>
- * <p>To disable rounding, configure as <tt><b>false</b></tt>.</p>
- */
- decimalPrecision: 0,
- /**
- * @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.
- */
- keyIncrement: 1,
- /**
- * @cfg {Number} increment How many units to change the slider when adjusting by drag and drop. Use this option to enable 'snapping'.
- */
- increment: 0,
- // private
- clickRange: [5,15],
- /**
- * @cfg {Boolean} clickToChange Determines whether or not clicking on the Slider axis will change the slider. Defaults to true
- */
- clickToChange : true,
- /**
- * @cfg {Boolean} animate Turn on or off animation. Defaults to true
- */
- animate: true,
- /**
- * True while the thumb is in a drag operation
- * @type boolean
- */
- dragging: false,
- // private override
- initComponent : function(){
- if(!Ext.isDefined(this.value)){
- this.value = this.minValue;
- }
- Ext.Slider.superclass.initComponent.call(this);
- this.keyIncrement = Math.max(this.increment, this.keyIncrement);
- this.addEvents(
- /**
- * @event beforechange
- * Fires before the slider value is changed. By returning false from an event handler,
- * you can cancel the event and prevent the slider from changing.
- * @param {Ext.Slider} slider The slider
- * @param {Number} newValue The new value which the slider is being changed to.
- * @param {Number} oldValue The old value which the slider was previously.
- */
- 'beforechange',
- /**
- * @event change
- * Fires when the slider value is changed.
- * @param {Ext.Slider} slider The slider
- * @param {Number} newValue The new value which the slider has been changed to.
- */
- 'change',
- /**
- * @event changecomplete
- * Fires when the slider value is changed by the user and any drag operations have completed.
- * @param {Ext.Slider} slider The slider
- * @param {Number} newValue The new value which the slider has been changed to.
- */
- 'changecomplete',
- /**
- * @event dragstart
- * Fires after a drag operation has started.
- * @param {Ext.Slider} slider The slider
- * @param {Ext.EventObject} e The event fired from Ext.dd.DragTracker
- */
- 'dragstart',
- /**
- * @event drag
- * Fires continuously during the drag operation while the mouse is moving.
- * @param {Ext.Slider} slider The slider
- * @param {Ext.EventObject} e The event fired from Ext.dd.DragTracker
- */
- 'drag',
- /**
- * @event dragend
- * Fires after the drag operation has completed.
- * @param {Ext.Slider} slider The slider
- * @param {Ext.EventObject} e The event fired from Ext.dd.DragTracker
- */
- 'dragend'
- );
- if(this.vertical){
- Ext.apply(this, Ext.Slider.Vertical);
- }
- },
- // private override
- onRender : function(){
- this.autoEl = {
- cls: 'x-slider ' + (this.vertical ? 'x-slider-vert' : 'x-slider-horz'),
- 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'}]}}
- };
- Ext.Slider.superclass.onRender.apply(this, arguments);
- this.endEl = this.el.first();
- this.innerEl = this.endEl.first();
- this.thumb = this.innerEl.first();
- this.halfThumb = (this.vertical ? this.thumb.getHeight() : this.thumb.getWidth())/2;
- this.focusEl = this.thumb.next();
- this.initEvents();
- },
- // private override
- initEvents : function(){
- this.thumb.addClassOnOver('x-slider-thumb-over');
- this.mon(this.el, {
- scope: this,
- mousedown: this.onMouseDown,
- keydown: this.onKeyDown
- });
- this.focusEl.swallowEvent("click", true);
- this.tracker = new Ext.dd.DragTracker({
- onBeforeStart: this.onBeforeDragStart.createDelegate(this),
- onStart: this.onDragStart.createDelegate(this),
- onDrag: this.onDrag.createDelegate(this),
- onEnd: this.onDragEnd.createDelegate(this),
- tolerance: 3,
- autoStart: 300
- });
- this.tracker.initEl(this.thumb);
- },
- // private override
- onMouseDown : function(e){
- if(this.disabled){
- return;
- }
- if(this.clickToChange && e.target != this.thumb.dom){
- var local = this.innerEl.translatePoints(e.getXY());
- this.onClickChange(local);
- }
- this.focus();
- },
- // private
- onClickChange : function(local){
- if(local.top > this.clickRange[0] && local.top < this.clickRange[1]){
- this.setValue(Ext.util.Format.round(this.reverseValue(local.left), this.decimalPrecision), undefined, true);
- }
- },
- // private
- onKeyDown : function(e){
- if(this.disabled){e.preventDefault();return;}
- var k = e.getKey();
- switch(k){
- case e.UP:
- case e.RIGHT:
- e.stopEvent();
- if(e.ctrlKey){
- this.setValue(this.maxValue, undefined, true);
- }else{
- this.setValue(this.value+this.keyIncrement, undefined, true);
- }
- break;
- case e.DOWN:
- case e.LEFT:
- e.stopEvent();
- if(e.ctrlKey){
- this.setValue(this.minValue, undefined, true);
- }else{
- this.setValue(this.value-this.keyIncrement, undefined, true);
- }
- break;
- default:
- e.preventDefault();
- }
- },
- // private
- doSnap : function(value){
- if(!(this.increment && value)){
- return value;
- }
- var newValue = value,
- inc = this.increment,
- m = value % inc;
- if(m != 0){
- newValue -= m;
- if(m * 2 > inc){
- newValue += inc;
- }else if(m * 2 < -inc){
- newValue -= inc;
- }
- }
- return newValue.constrain(this.minValue, this.maxValue);
- },
- // private
- afterRender : function(){
- Ext.Slider.superclass.afterRender.apply(this, arguments);
- if(this.value !== undefined){
- var v = this.normalizeValue(this.value);
- if(v !== this.value){
- delete this.value;
- this.setValue(v, false);
- }else{
- this.moveThumb(this.translateValue(v), false);
- }
- }
- },
- // private
- getRatio : function(){
- var w = this.innerEl.getWidth(),
- v = this.maxValue - this.minValue;
- return v == 0 ? w : (w/v);
- },
- // private
- normalizeValue : function(v){
- v = this.doSnap(v);
- v = Ext.util.Format.round(v, this.decimalPrecision);
- v = v.constrain(this.minValue, this.maxValue);
- return v;
- },
- /**
- * Programmatically sets the value of the Slider. Ensures that the value is constrained within
- * the minValue and maxValue.
- * @param {Number} value The value to set the slider to. (This will be constrained within minValue and maxValue)
- * @param {Boolean} animate Turn on or off animation, defaults to true
- */
- setValue : function(v, animate, changeComplete){
- v = this.normalizeValue(v);
- if(v !== this.value && this.fireEvent('beforechange', this, v, this.value) !== false){
- this.value = v;
- this.moveThumb(this.translateValue(v), animate !== false);
- this.fireEvent('change', this, v);
- if(changeComplete){
- this.fireEvent('changecomplete', this, v);
- }
- }
- },
- // private
- translateValue : function(v){
- var ratio = this.getRatio();
- return (v * ratio) - (this.minValue * ratio) - this.halfThumb;
- },
- reverseValue : function(pos){
- var ratio = this.getRatio();
- return (pos + this.halfThumb + (this.minValue * ratio)) / ratio;
- },
- // private
- moveThumb: function(v, animate){
- if(!animate || this.animate === false){
- this.thumb.setLeft(v);
- }else{
- this.thumb.shift({left: v, stopFx: true, duration:.35});
- }
- },
- // private
- focus : function(){
- this.focusEl.focus(10);
- },
- // private
- onBeforeDragStart : function(e){
- return !this.disabled;
- },
- // private
- onDragStart: function(e){
- this.thumb.addClass('x-slider-thumb-drag');
- this.dragging = true;
- this.dragStartValue = this.value;
- this.fireEvent('dragstart', this, e);
- },
- // private
- onDrag: function(e){
- var pos = this.innerEl.translatePoints(this.tracker.getXY());
- this.setValue(Ext.util.Format.round(this.reverseValue(pos.left), this.decimalPrecision), false);
- this.fireEvent('drag', this, e);
- },
- // private
- onDragEnd: function(e){
- this.thumb.removeClass('x-slider-thumb-drag');
- this.dragging = false;
- this.fireEvent('dragend', this, e);
- if(this.dragStartValue != this.value){
- this.fireEvent('changecomplete', this, this.value);
- }
- },
- // private
- onResize : function(w, h){
- this.innerEl.setWidth(w - (this.el.getPadding('l') + this.endEl.getPadding('r')));
- this.syncThumb();
- },
- //private
- onDisable: function(){
- Ext.Slider.superclass.onDisable.call(this);
- this.thumb.addClass(this.disabledClass);
- if(Ext.isIE){
- //IE breaks when using overflow visible and opacity other than 1.
- //Create a place holder for the thumb and display it.
- var xy = this.thumb.getXY();
- this.thumb.hide();
- this.innerEl.addClass(this.disabledClass).dom.disabled = true;
- if (!this.thumbHolder){
- this.thumbHolder = this.endEl.createChild({cls: 'x-slider-thumb ' + this.disabledClass});
- }
- this.thumbHolder.show().setXY(xy);
- }
- },
- //private
- onEnable: function(){
- Ext.Slider.superclass.onEnable.call(this);
- this.thumb.removeClass(this.disabledClass);
- if(Ext.isIE){
- this.innerEl.removeClass(this.disabledClass).dom.disabled = false;
- if(this.thumbHolder){
- this.thumbHolder.hide();
- }
- this.thumb.show();
- this.syncThumb();
- }
- },
- /**
- * Synchronizes the thumb position to the proper proportion of the total component width based
- * on the current slider {@link #value}. This will be called automatically when the Slider
- * is resized by a layout, but if it is rendered auto width, this method can be called from
- * another resize handler to sync the Slider if necessary.
- */
- syncThumb : function(){
- if(this.rendered){
- this.moveThumb(this.translateValue(this.value));
- }
- },
- /**
- * Returns the current value of the slider
- * @return {Number} The current value of the slider
- */
- getValue : function(){
- return this.value;
- },
- // private
- beforeDestroy : function(){
- Ext.destroyMembers(this, 'endEl', 'innerEl', 'thumb', 'halfThumb', 'focusEl', 'tracker', 'thumbHolder');
- Ext.Slider.superclass.beforeDestroy.call(this);
- }
- });
- Ext.reg('slider', Ext.Slider);
- // private class to support vertical sliders
- Ext.Slider.Vertical = {
- onResize : function(w, h){
- this.innerEl.setHeight(h - (this.el.getPadding('t') + this.endEl.getPadding('b')));
- this.syncThumb();
- },
- getRatio : function(){
- var h = this.innerEl.getHeight(),
- v = this.maxValue - this.minValue;
- return h/v;
- },
- moveThumb: function(v, animate){
- if(!animate || this.animate === false){
- this.thumb.setBottom(v);
- }else{
- this.thumb.shift({bottom: v, stopFx: true, duration:.35});
- }
- },
- onDrag: function(e){
- var pos = this.innerEl.translatePoints(this.tracker.getXY()),
- bottom = this.innerEl.getHeight()-pos.top;
- this.setValue(this.minValue + Ext.util.Format.round(bottom/this.getRatio(), this.decimalPrecision), false);
- this.fireEvent('drag', this, e);
- },
- onClickChange : function(local){
- if(local.left > this.clickRange[0] && local.left < this.clickRange[1]){
- var bottom = this.innerEl.getHeight() - local.top;
- this.setValue(this.minValue + Ext.util.Format.round(bottom/this.getRatio(), this.decimalPrecision), undefined, true);
- }
- }
- };