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  1. #1
    uran uran ist offline Mitglied Silber
    Registriert seit
    Oct 2003
    Beiträge
    80
    Hi,
    Ich versuche gerade einen 2 Handle-Slider mit Scriptaculous hinzubekommen. Leider gibt es hierzu im Netz recht wenig bis gar nichts.

    Ich nutze quasi den Standard-Slider und möchte ihn auf 2 Buttons erweitern um eine art Bandbreite festzlegen. Sowas gibts bei jquery massenweise nur bei Scriptaculous fast gar nichts.

    Bsp. wie es ungefähr sein sollte: http://jqueryui.com/demos/slider/range.html

    HTML-Code:
    <div id="debug1">Keine Auswahl</div><div id="track1" style="width:265px; height:20px;">
    
                <div id="track1-left"></div>
                <div id="handle1" style="width:18px; height:17px;"><img src="img/slider-images-handle.png" alt="" style="float: left;" /></div>
              </div>
              
              <script type="text/javascript" language="javascript">
    		// <![CDATA[
    		
    			// horizontal slider control
    			new Control.Slider('handle1', 'track1', {
    				range: $R(00, 10),
    				values: [00,01,02,03,04,05,06,07,08,09,10],
    				onSlide: function(v) { $('debug1').innerHTML = v + ' von 10 Punkten' },
    				onChange: function(v) { $('debug1').innerHTML = v + ' von 10 Punkten' }
    			});
    
    		// ]]>
    		</script>
    Dazu gehört noch das externe JS:

    HTML-Code:
    // script.aculo.us slider.js v1.6.5, Wed Nov 08 14:17:49 CET 2006
    
    // Copyright (c) 2005, 2006 Marty Haught, Thomas Fuchs 
    //
    // script.aculo.us is freely distributable under the terms of an MIT-style license.
    // For details, see the script.aculo.us web site: http://script.aculo.us/
    
    if(!Control) var Control = {};
    Control.Slider = Class.create();
    
    // options:
    //  axis: 'vertical', or 'horizontal' (default)
    //
    // callbacks:
    //  onChange(value)
    //  onSlide(value)
    Control.Slider.prototype = {
      initialize: function(handle, track, options) {
        var slider = this;
        
        if(handle instanceof Array) {
          this.handles = handle.collect( function(e) { return $(e) });
        } else {
          this.handles = [$(handle)];
        }
        
        this.track   = $(track);
        this.options = options || {};
    
        this.axis      = this.options.axis || 'horizontal';
        this.increment = this.options.increment || 1;
        this.step      = parseInt(this.options.step || '1');
        this.range     = this.options.range || $R(0,10);
        
        this.value     = 0; // assure backwards compat
        this.values    = this.handles.map( function() { return 0 });
        this.spans     = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
        this.options.startSpan = $(this.options.startSpan || null);
        this.options.endSpan   = $(this.options.endSpan || null);
    
        this.restricted = this.options.restricted || false;
    
        this.maximum   = this.options.maximum || this.range.end;
        this.minimum   = this.options.minimum || this.range.start;
    
        // Will be used to align the handle onto the track, if necessary
        this.alignX = parseInt(this.options.alignX || '0');
        this.alignY = parseInt(this.options.alignY || '0');
        
        this.trackLength = this.maximumOffset() - this.minimumOffset();
    
        this.handleLength = this.isVertical() ? 
          (this.handles[0].offsetHeight != 0 ? 
            this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) : 
          (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth : 
            this.handles[0].style.width.replace(/px$/,""));
    
        this.active   = false;
        this.dragging = false;
        this.disabled = false;
    
        if(this.options.disabled) this.setDisabled();
    
        // Allowed values array
        this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
        if(this.allowedValues) {
          this.minimum = this.allowedValues.min();
          this.maximum = this.allowedValues.max();
        }
    
        this.eventMouseDown = this.startDrag.bindAsEventListener(this);
        this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
        this.eventMouseMove = this.update.bindAsEventListener(this);
    
        // Initialize handles in reverse (make sure first handle is active)
        this.handles.each( function(h,i) {
          i = slider.handles.length-1-i;
          slider.setValue(parseFloat(
            (slider.options.sliderValue instanceof Array ? 
              slider.options.sliderValue[i] : slider.options.sliderValue) || 
             slider.range.start), i);
          Element.makePositioned(h); // fix IE
          Event.observe(h, "mousedown", slider.eventMouseDown);
        });
        
        Event.observe(this.track, "mousedown", this.eventMouseDown);
        Event.observe(document, "mouseup", this.eventMouseUp);
        Event.observe(document, "mousemove", this.eventMouseMove);
        
        this.initialized = true;
      },
      dispose: function() {
        var slider = this;    
        Event.stopObserving(this.track, "mousedown", this.eventMouseDown);
        Event.stopObserving(document, "mouseup", this.eventMouseUp);
        Event.stopObserving(document, "mousemove", this.eventMouseMove);
        this.handles.each( function(h) {
          Event.stopObserving(h, "mousedown", slider.eventMouseDown);
        });
      },
      setDisabled: function(){
        this.disabled = true;
      },
      setEnabled: function(){
        this.disabled = false;
      },  
      getNearestValue: function(value){
        if(this.allowedValues){
          if(value >= this.allowedValues.max()) return(this.allowedValues.max());
          if(value <= this.allowedValues.min()) return(this.allowedValues.min());
          
          var offset = Math.abs(this.allowedValues[0] - value);
          var newValue = this.allowedValues[0];
          this.allowedValues.each( function(v) {
            var currentOffset = Math.abs(v - value);
            if(currentOffset <= offset){
              newValue = v;
              offset = currentOffset;
            } 
          });
          return newValue;
        }
        if(value > this.range.end) return this.range.end;
        if(value < this.range.start) return this.range.start;
        return value;
      },
      setValue: function(sliderValue, handleIdx){
        if(!this.active) {
          this.activeHandleIdx = handleIdx || 0;
          this.activeHandle    = this.handles[this.activeHandleIdx];
          this.updateStyles();
        }
        handleIdx = handleIdx || this.activeHandleIdx || 0;
        if(this.initialized && this.restricted) {
          if((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))
            sliderValue = this.values[handleIdx-1];
          if((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))
            sliderValue = this.values[handleIdx+1];
        }
        sliderValue = this.getNearestValue(sliderValue);
        this.values[handleIdx] = sliderValue;
        this.value = this.values[0]; // assure backwards compat
        
        this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] = 
          this.translateToPx(sliderValue);
        
        this.drawSpans();
        if(!this.dragging || !this.event) this.updateFinished();
      },
      setValueBy: function(delta, handleIdx) {
        this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta, 
          handleIdx || this.activeHandleIdx || 0);
      },
      translateToPx: function(value) {
        return Math.round(
          ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) * 
          (value - this.range.start)) + "px";
      },
      translateToValue: function(offset) {
        return ((offset/(this.trackLength-this.handleLength) * 
          (this.range.end-this.range.start)) + this.range.start);
      },
      getRange: function(range) {
        var v = this.values.sortBy(Prototype.K); 
        range = range || 0;
        return $R(v[range],v[range+1]);
      },
      minimumOffset: function(){
        return(this.isVertical() ? this.alignY : this.alignX);
      },
      maximumOffset: function(){
        return(this.isVertical() ? 
          (this.track.offsetHeight != 0 ? this.track.offsetHeight :
            this.track.style.height.replace(/px$/,"")) - this.alignY : 
          (this.track.offsetWidth != 0 ? this.track.offsetWidth : 
            this.track.style.width.replace(/px$/,"")) - this.alignY);
      },  
      isVertical:  function(){
        return (this.axis == 'vertical');
      },
      drawSpans: function() {
        var slider = this;
        if(this.spans)
          $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });
        if(this.options.startSpan)
          this.setSpan(this.options.startSpan,
            $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));
        if(this.options.endSpan)
          this.setSpan(this.options.endSpan, 
            $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));
      },
      setSpan: function(span, range) {
        if(this.isVertical()) {
          span.style.top = this.translateToPx(range.start);
          span.style.height = this.translateToPx(range.end - range.start + this.range.start);
        } else {
          span.style.left = this.translateToPx(range.start);
          span.style.width = this.translateToPx(range.end - range.start + this.range.start);
        }
      },
      updateStyles: function() {
        this.handles.each( function(h){ Element.removeClassName(h, 'selected') });
        Element.addClassName(this.activeHandle, 'selected');
      },
      startDrag: function(event) {
        if(Event.isLeftClick(event)) {
          if(!this.disabled){
            this.active = true;
            
            var handle = Event.element(event);
            var pointer  = [Event.pointerX(event), Event.pointerY(event)];
            var track = handle;
            if(track==this.track) {
              var offsets  = Position.cumulativeOffset(this.track); 
              this.event = event;
              this.setValue(this.translateToValue( 
               (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)
              ));
              var offsets  = Position.cumulativeOffset(this.activeHandle);
              this.offsetX = (pointer[0] - offsets[0]);
              this.offsetY = (pointer[1] - offsets[1]);
            } else {
              // find the handle (prevents issues with Safari)
              while((this.handles.indexOf(handle) == -1) && handle.parentNode) 
                handle = handle.parentNode;
                
              if(this.handles.indexOf(handle)!=-1) {
                this.activeHandle    = handle;
                this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
                this.updateStyles();
                
                var offsets  = Position.cumulativeOffset(this.activeHandle);
                this.offsetX = (pointer[0] - offsets[0]);
                this.offsetY = (pointer[1] - offsets[1]);
              }
            }
          }
          Event.stop(event);
        }
      },
      update: function(event) {
       if(this.active) {
          if(!this.dragging) this.dragging = true;
          this.draw(event);
          // fix AppleWebKit rendering
          if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
          Event.stop(event);
       }
      },
      draw: function(event) {
        var pointer = [Event.pointerX(event), Event.pointerY(event)];
        var offsets = Position.cumulativeOffset(this.track);
        pointer[0] -= this.offsetX + offsets[0];
        pointer[1] -= this.offsetY + offsets[1];
        this.event = event;
        this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));
        if(this.initialized && this.options.onSlide)
          this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
      },
      endDrag: function(event) {
        if(this.active && this.dragging) {
          this.finishDrag(event, true);
          Event.stop(event);
        }
        this.active = false;
        this.dragging = false;
      },  
      finishDrag: function(event, success) {
        this.active = false;
        this.dragging = false;
        this.updateFinished();
      },
      updateFinished: function() {
        if(this.initialized && this.options.onChange) 
          this.options.onChange(this.values.length>1 ? this.values : this.value, this);
        this.event = null;
      }
    }
    Vielen Dank!
     

  2. #2
    Avatar von Sven Mintel
    Sven Mintel Sven Mintel ist offline Mitglied
    Registriert seit
    Aug 2003
    Beiträge
    18.238
    Blog-Einträge
    6
     

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