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rachjm
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Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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 Posted: Tue Apr 29, 2008 1:40 am Post subject: Does anybody actually use this forum? |
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I've posted questions here before and I never get any answer...
Oh well - I'll try again:
I am working on this page:
http://www.texmate.co.nz/sampleSite/icc402.html
This is the script that I am using:
http://www.texmate.co.nz/sampleSite/scripts/imagePreview.js
Hover over the image of the controller (gray case with green connectors). As you can see a hover-over, mouse-following image appears. The script works fine except that the hovering image 'jumps' down if the distance between the cursor and the bottom of the browser pane exceeds the height of the image.
I would like to remove this effect so that the hover image always stays centred to the cursor vertically, regardless of the size of the browser window or the position of the cursor over the thumbnail.
Hope that makes sense. 
Any help at all would be greatly appreciated.
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webmaster
Site Admin
Joined: 17 Aug 2004
Posts: 3620
Location: Sweden
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| Posted: Tue Apr 29, 2008 7:40 am Post subject: Re: Does anybody actually use this forum? |
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Try to change:
gettrailobj().top=ycoord+"px"
To:
gettrailobj().top=ycoord
And see what happends |
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rangana
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Joined: 27 Feb 2008
Posts: 563
Location: Cebu City Philippines
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| Posted: Tue Apr 29, 2008 11:04 am Post subject: Re: Does anybody actually use this forum? |
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....Also, could you link us to where you got this script?..
Comparision from the original script to the edited one will be useful too, and there are times, that the original script has this mess in which...we must give concern |
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rachjm
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Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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| Posted: Tue Apr 29, 2008 9:11 pm Post subject: Re: Does anybody actually use this forum? |
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Hooray - responses!  You guys rock, I really thought I was gonna get nothing...
Below is the original code, which I haven't really modified very much. I found it on this forum website: http://codingforums.com/showthread.php?t=82751
Interestingly, while it contains the javascriptkit.com header, I can't find anything similar anywhere on their site... (Perhaps it has been removed?)
| Code: |
<script>
/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact
*/
var w=1
var h=1
if (document.getElementById || document.all)
document.write('<div id="trailimageid" style="position:absolute;visibility:hidden;left:0px;top:-1000px;width:1px;height:1px;border:1px solid #888888;background:#DDDDDD;"><img id="ttimg" src="img/s.gif" /></div>')
function gettrailobj()
{
if (document.getElementById) return document.getElementById("trailimageid").style
else if (document.all) return document.all.trailimagid.style
}
function truebody()
{
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}
function hidetrail()
{
document.onmousemove=""
document.getElementById('ttimg').src='img/s.gif'
gettrailobj().visibility="hidden"
gettrailobj().left=-1000
gettrailobj().top=0
}
function showtrail(width,height,file)
{
if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1)
{
w=width
h=height
// followmouse()
gettrailobj().visibility="visible"
gettrailobj().width=w+"px"
gettrailobj().height=h+"px"
document.getElementById('ttimg').src=file
document.onmousemove=followmouse
}
}
function followmouse(e)
{
if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1)
{
var xcoord=20
var ycoord=20
if (typeof e != "undefined")
{
xcoord+=e.pageX
ycoord+=e.pageY
}
else if (typeof window.event !="undefined")
{
xcoord+=truebody().scrollLeft+event.clientX
ycoord+=truebody().scrollTop+event.clientY
}
var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
var docheight=document.all? Math.max(truebody().scrollHeight, truebody().clientHeight) : Math.max(document.body.offsetHeight, window.innerHeight)
if (xcoord+w+3>docwidth)
xcoord=xcoord-w-(20*2)
if (ycoord-truebody().scrollTop+h>truebody().clientHeight)
ycoord=ycoord-h-20;
gettrailobj().left=xcoord+"px"
gettrailobj().top=ycoord+"px"
}
}
</script>
<img onmouseover="showtrail(200,300,'largeimage.gif');" onmouseout="hidetrail();" src="smallimage.gif" width="67" height="100" style="padding-top:10px;" /> |
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rachjm
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Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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| Posted: Tue Apr 29, 2008 9:21 pm Post subject: Re: Does anybody actually use this forum? |
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Oh and by the way, I tried this:
| webmaster wrote: |
Try to change:
gettrailobj().top=ycoord+"px"
To:
gettrailobj().top=ycoord
And see what happends |
This causes the y coordinate to get stuck at zero, so the hover image sticks to the top of the browser window at all times.
Thanks for trying, though. |
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rangana
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Joined: 27 Feb 2008
Posts: 563
Location: Cebu City Philippines
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| Posted: Wed Apr 30, 2008 1:14 am Post subject: Re: Does anybody actually use this forum? |
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Change the ycoord default from 20 to -40
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rachjm
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Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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| Posted: Wed Apr 30, 2008 1:22 am Post subject: Re: Does anybody actually use this forum? |
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| rangana wrote: |
Change the ycoord default from 20 to -40
|
That just shifts it up a bit, relative to the cursor. The image still jumps around if the browser window is too small...
I want to remove completely the function that is repositioning the image with reference to the browser height, so that it is always relative to the cursor, NOT the browser window. |
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rangana
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Joined: 27 Feb 2008
Posts: 563
Location: Cebu City Philippines
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| Posted: Wed Apr 30, 2008 1:25 am Post subject: Re: Does anybody actually use this forum? |
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...Where does it jump?..I'm confused
...Also, what's so peculiar in a relatively small window, does your client uses a small portion of the browser only |
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rachjm
250+ Club
Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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| Posted: Wed Apr 30, 2008 1:30 am Post subject: Re: Does anybody actually use this forum? |
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| rangana wrote: |
| ...Where does it jump?..I'm confused |
Sorry - I'm not explaining myself very well...
On a 1024x768 screen, try hovering over the very top pixel of the thumbnail image and moving your cursor very slowly downwards towards the bottom of your browser window. When I do this, the hover image 'jumps'
I hope you can see this - I can't think of any other way to explain it. |
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rangana
500+ Club
Joined: 27 Feb 2008
Posts: 563
Location: Cebu City Philippines
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| Posted: Wed Apr 30, 2008 1:37 am Post subject: Re: Does anybody actually use this forum? |
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| Don't you like the effect?..It goes up when the container of the large image reaches the bottom of the window...I see this as a good effect...you hate it? |
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rachjm
250+ Club
Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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| Posted: Wed Apr 30, 2008 1:44 am Post subject: Re: Does anybody actually use this forum? |
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I didn't like it initially - but with the y offset set to -40 I have to admit it doesn't look too bad. Would still prefer if it wasn't there, but you're right - I may be nitpicking...
I guess I'll just have to live with it. Thanks for responding so quickly - southern hemisphere?
Everyone in the photoshop forum's northern, I think - all my posts get replies in the middle of the night... |
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rangana
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Joined: 27 Feb 2008
Posts: 563
Location: Cebu City Philippines
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| Posted: Wed Apr 30, 2008 2:14 am Post subject: Re: Does anybody actually use this forum? |
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| No worries..just get back if you're still stumped |
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rachjm
250+ Club
Joined: 26 Mar 2008
Posts: 354
Location: New Zealand
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| Posted: Wed Apr 30, 2008 4:14 am Post subject: Re: Does anybody actually use this forum? |
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Solved it!
The hover image now stays centered vertically to the cursor regardless of the browser window size. Here's what I ended up with (in case you're trying to solve a similar problem yourself!)
Changed this:
var xcoord=20
var ycoord=20
To this:
var xcoord=30
var ycoord=-h/2
---
And changed this:
ycoord=ycoord-h-20;
To this:
ycoord=ycoord
---
Thanks everyone for your input and for helping me get thinking along the right lines... |
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