robbyrussell (owner)

Revisions

gist: 54404 Download_button fork
public
Description:
basic carousel-like class using Prototype
Public Clone URL: git://gist.github.com/54404.git
Embed All Files: show embed
container_of_widgets.html #
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<div id="x_container">
  <a id="x_back_button"><img src="/images/left-arrow.png" /></a>
  <a id="x_forward_button"><img src="/images/right-arrow.png" /></a>
 
  <div class="x_widget">
    <p>content...1</p>
  </div>
 
  <div class="x_widget" style="display:none;">
    <p>content...2</p>
  </div>
 
  <div class="x_widget" style="display:none;">
    <p>content...3</p>
  </div>
</div>
 
<script type="text/javascript">
  new ElementSlider( 'x_container', '.x_widget', 'x_back_button', 'x_forward_button' );
</script>
element_slider.js #
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var ElementSlider = Class.create();
 
ElementSlider.prototype = {
  initialize: function( container_element, item_element, back_button_element, forward_button_element ) {
   	this.container_element = container_element;
 
  	this.items = $( this.container_element ).select( item_element ).toArray();
 
  	this.back_button_element = back_button_element;
  	this.forward_button_element = forward_button_element;
 
    this.current_item_index = 0;
 
  	this.observeBackButton();
  	this.observeForwardButton();
  },
 
  observeBackButton: function() {
  	Event.observe( this.back_button_element, 'click', this.moveBack.bindAsEventListener(this), false );
  },
 
  observeForwardButton: function() {
  	Event.observe( this.forward_button_element, 'click', this.moveForward.bindAsEventListener(this), false );
  },
 
  moveForward: function() {
    if ( this.items[this.current_item_index] == this.items.last() ) {
      this.current_item_index = 0;
    } else {
      this.current_item_index += 1;      
    }
    this.resetItems();
  },
  
  moveBack: function() {
    // if first, set to last
    if ( this.items[this.current_item_index] == this.items.first() ) {
      this.current_item_index = ( this.items.size() - 1 );
    } else {
      this.current_item_index = ( this.current_item_index - 1 );      
    }
    this.resetItems();    
  },
  
  resetItems: function() {
    this.items.each( function( item ) { $( item ).hide(); })
    this.items[this.current_item_index].show();
  }
}
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