Create, position, and size the slider and its two children (_track and _thumb) make the thumb drag-repositionable : Slider « SmartClient « JavaScript DHTML






  1. JavaScript DHTML
  2. SmartClient
  3. Slider

Create, position, and size the slider and its two children (_track and _thumb) make the thumb drag-repositionable

 

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<!-- The following code is revised from SmartClient demo code(SmartClient_70rc2_LGPL.zip).-->


<HTML><HEAD>
  <SCRIPT>var isomorphicDir = "isomorphic/";</SCRIPT>
    <SCRIPT SRC=isomorphic/system/modules/ISC_Core.js></SCRIPT>
    <SCRIPT SRC=isomorphic/system/modules/ISC_Foundation.js></SCRIPT>
    <SCRIPT SRC=isomorphic/system/modules/ISC_Containers.js></SCRIPT>
    <SCRIPT SRC=isomorphic/system/modules/ISC_Grids.js></SCRIPT>
    <SCRIPT SRC=isomorphic/system/modules/ISC_Forms.js></SCRIPT>
    <SCRIPT SRC=isomorphic/system/modules/ISC_DataBinding.js></SCRIPT>
  <SCRIPT SRC=isomorphic/skins/standard/load_skin.js></SCRIPT>
  <SCRIPT>
/*---------->    SimpleSlider_1.js    <----------*/

// Step 1
//  * create, position, and size the slider and its two children (_track and _thumb)
//  * make the thumb drag-repositionable, just for fun

ClassFactory.defineClass("SimpleSlider", Canvas);


SimpleSlider.addProperties({
    length:200,
    vertical:true,
    
    thumbThickWidth:30,
    thumbThinWidth:10,
    trackWidth:4,
    
    
    initWidget : function () {
        this.Super("initWidget",  arguments);
        
        var width, height;
        
        if (this.vertical) {
            width = Math.max(this.thumbThickWidth, this.trackWidth);
            height = this.length;
        } else {
            width = this.length;
            height = Math.max(this.thumbThickWidth, this.trackWidth);
        }
        
        this.setWidth(width);
        this.setHeight(height);
        
        this._usableLength = this.length-this.thumbThinWidth;
        
        this._track = this.addChild(this._createTrack());
        this._thumb = this.addChild(this._createThumb());
    },
    
    
    _createTrack : function () {
        return Canvas.create({
            autoDraw:false,
            left:(this.vertical ? Math.floor((this.getWidth() - this.trackWidth)/2) : 0),
            top:(this.vertical ? 0 : Math.floor((this.getHeight() - this.trackWidth)/2)),
            width:(this.vertical ? this.trackWidth : this.getWidth()),
            height:(this.vertical ? this.getHeight() : this.trackWidth),
            vertical:this.vertical,
            backgroundColor:"#666666",
            overflow:Canvas.HIDDEN
        });
    },
    
    
    _createThumb : function () {
        return Canvas.create({
            autoDraw:false,
            left:(this.vertical ? Math.floor((this.getWidth() - this.thumbThickWidth)/2) : 0),
            top:(this.vertical ? 0 : Math.floor((this.getHeight() - this.thumbThickWidth)/2)),
            width:(this.vertical ? this.thumbThickWidth : this.thumbThinWidth),
            height:(this.vertical ? this.thumbThinWidth : this.thumbThickWidth),
            canDragReposition:true,
            dragAppearance:EventHandler.TARGET,
            backgroundColor:"#AAAAAA"
        });
    }


});
  
  </SCRIPT>
</HEAD><BODY BGCOLOR='powderblue'>
<SCRIPT>


//--------------------------------------------------
//  sliders
//--------------------------------------------------

SimpleSlider.create({
  ID:"vSlider",
  left:100,
  top:100
});

SimpleSlider.create({
  ID:"hSlider",
  left:300,
  top:180,
  vertical:false
});


</SCRIPT>
</BODY>
</HTML>








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