Use slider to create a color mixer : Slider « SmartClient « JavaScript DHTML






Use slider to create a color mixer

 
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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/SmartClient/load_skin.js></SCRIPT>
</HEAD><BODY BGCOLOR='powderblue' MARGINHEIGHT=0 MARGINWIDTH=0 LEFTMARGIN=0 TOPMARGIN=0>
<TABLE WIDTH=100% CELLSPACING=0 CELLPADDING=5 BORDER=0><TR><TD CLASS=pageHeader BGCOLOR=WHITE>

  Slider color mixer example

</TD><TD CLASS=pageHeader ALIGN=RIGHT BGCOLOR=WHITE>

  Isomorphic SmartClient SDK

</TD></TR></TABLE><TABLE WIDTH=100% CELLSPACING=0 CELLPADDING=0 BORDER=0><TR>
<TD BGCOLOR=336666><IMG SRC=images/blank.gif WIDTH=1 HEIGHT=4></TD></TR></TABLE>


<!--------------------------
  Example code starts here
---------------------------->

<SCRIPT>

function num2hex(num) {
  var lowWord = num%16,
    highWord = (num-lowWord)/16;
  return num2hexdigit(highWord)+""+num2hexdigit(lowWord);
}

function num2hexdigit(num) {
  if (num == 10) return "A";
  else if (num == 11) return "B";
  else if (num == 12) return "C";
  else if (num == 13) return "D";
  else if (num == 14) return "E";
  else if (num == 15) return "F";
  else return ""+num;
}

var colorBox = Canvas.newInstance({
  left:400,
  top:115,
  width:200,
  height:200,
  red:"77",
  green:"77",
  blue:"77",
  backgroundColor:"777777",
  sliderMove:function(event,slider){
    var newColor = num2hex(Math.round(slider.value));
    if (slider.ID == "sliderRed") this.red = newColor;
    else if (slider.ID == "sliderGreen") this.green = newColor;
    else if (slider.ID == "sliderBlue") this.blue = newColor;
    this.setBackgroundColor(this.red+""+this.green+""+this.blue);
    return false;
  }
});

Slider.newInstance({
  ID:"sliderRed",
  title:"Red",
  left:60,
  top:90,
  sliderTarget:colorBox,
  value:128,
  minValue:0,
  maxValue:255
});


Slider.newInstance({
  ID:"sliderGreen",
  title:"Green",
  left:155,
  top:90,
  //sliderTarget:colorBox,
  value:128,
  minValue:0,
  maxValue:255
});


Slider.newInstance({
  ID:"sliderBlue",
  title:"Blue",
  left:250,
  top:90,
  //sliderTarget:colorBox,
  value:128,
  minValue:0,
  maxValue:255
});


Slider.newInstance({
  ID:"sliderSize",
  title:"Size",
  left:350,
  top:330,
  vertical:false,
  value:200,
  minValue:20,
  minValueLabel:"Small",
  maxValue:200,
  maxValueLabel:"Big",
  numValues:10
});


//colorBox.observe(sliderRed, "valueChanged", "observer.sliderMove(null,observed)");
colorBox.observe(sliderGreen, "valueChanged", "observer.sliderMove(null,observed)");
colorBox.observe(sliderBlue, "valueChanged", "observer.sliderMove(null,observed)");
colorBox.observe(sliderSize, "valueChanged", "observer.resizeTo(observed.value,observed.value)");

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

   
  








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