interactive online meter read submission

[laura99]

Hello,
i am trying to add a clickable meter read dial to a website
that once the mouse inside the clock like cirle (meter read dial) is clicked, the arm will move and a text box will reflect what the number is... here's an example .. for seeing the diale please click the check box for natural gas and the bottom of the page the dial will show up

thanks for your time in advance

 

[jemminger]

fantastic. post the code you're having trouble with and we'll help you debug it. we are not a write-my-project-for-me-for-free sweatshop ;-)

-jeff

http://www.jeffemminger.com

try { succeed(); } catch(E) { tryAgain(); } finally { rtfm(); }
i like your sleeves...they're real big

 

[laura99]

Thanks for reminding that to me Jemminger , i guess what i need is direction as what approach to take, i can get the position of mouse on IE but not firefox or netscape as the first step...
this is what i have sofar
function OnclickIENS(form)
{
//this detects the objects defined withing IE4+
if(document.all)
{
document.MeterTest.DialeNumberx.value=event.offsetX;
document.MeterTest.DialeNumbery.value=event.offsetY;
}

//if (navigator.appName.indexOf("Netscape")!=-1)
//detects object supports for FireFox and NS6+
if(document.getElementById && !document.all)
{
document.MeterTest.DialeNumberx.value=event.pageX;
document.MeterTest.DialeNumbery.value=event.pageY;
}

once i get this to work, should i be looking at the cirle as
a 360 degree object and do the calculation...

 

[BillyRayPreachersSon]

Yes - to determine what angle the dial should be at, you can use basic trigonometry. You know the coordinates of the center of the dial, and you can make a triangle between that, the mouse coordinates, and the 90 degree angles to work out the angle you're at.

Remember that JavaScript works in radians, so you'll have to convert your measurement to degrees.

Hope this helps,
Dan

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