Fade Effect Flickering Problem

Question

I have thumbnail gallery that utilizes the fade effect on the
mouseover event. Unfortunately, if the user mouses over the
thumbnails too quickly, the images flicker quite horribly. I was
wondering if there was a way to remove this problem.
Thanks
You can view the gallery
here

Answer 1

Hello existdissolve,
Your problem in the gallery has 2 issues:
1. Indeed you discovered a bug that I managed to fix in the
internal version that will be published next week. In the code
below that I will give I will include the work around for the
problem too.
2. Seems that you didn't completely understood the meaning of
the toggle option and I will try to explain you more detailed here.
Basically the toggle option is not controlling the direction of the
running effect as I think you understood. The toggle will not tell
to the effect to run in reverse direction but instead its scope is
to tell the effect that it CAN run in reverse direction.
When you try to animate an element using a link, when you set
the toggle option on, the animation will go between the from and to
values, on the first click, and will go between to and from values
on a second click. This cycle could repeat infinitely.
When you try to achieve this effect using 2 links you'll have
2 implementation solutions:
a. Use the same line of code for both links.
<a href="#" onclick="MM_effectAppearFade('element', 500,
0, 100, true)">Click Me First</a>
<a href="#" onclick="MM_effectAppearFade('element', 500,
0, 100, true)">Click Me Second</a>
You will observe that if you'll click these links in order
the element will appear and then will disappear back.
b. Use 2 non toggling effects with the from and the to
options reversed:
<a href="#" onclick="MM_effectAppearFade('element', 500,
0, 100, false)">Click Me First</a>
<a href="#" onclick="MM_effectAppearFade('element', 500,
100, 0, false)">Click Me Second</a>
There is however a problem why I am not recommending this
second solution in your case. If you click on the links in the
second example fast enough in their order you'll have a weird
result. The 2 effects are not knowing the other effect is running
so you'll end up with 2 effects that tries to do an opposite action
in the same time on the same element. This is somehow happening in
your case too if you move the mouse over the images fast enough you
can't predict anymore what the result will be.
In this situation you'll have to change a little bit the code
in your page. Right now you have this code:
<img id="tn{ds_RowID}"
src="galleries/{dsGalleries::@base}{dsGallery::@base}/thumbnails/{@thumbpath}"
width="90"
height="90"
alt="Sample Images from Spry Data."
title="{ds_RowNumber}"
style="opacity:0.3; filter:alpha(opacity=30)"
onmouseover="MM_effectAppearFade('tn{ds_RowID}', 500, 30,
100, false)"
onmouseout="MM_effectAppearFade('tn{ds_RowID}', 500, 100, 30,
true)"
onclick="HandleThumbnailClick('{ds_RowID}');" />
When you change the onmouseover and the onmouseout effects to
match the first solution I explained above you'll result with this
code:
<img id="tn{ds_RowID}"
src="galleries/{dsGalleries::@base}{dsGallery::@base}/thumbnails/{@thumbpath}"
width="90"
height="90"
alt="Sample Images from Spry Data."
title="{ds_RowNumber}"
style="opacity:0.3; filter:alpha(opacity=30)"
onmouseover="MM_effectAppearFade(this, 500, 30, 100, true)"
onmouseout="MM_effectAppearFade(this, 500, 30, 100, true)"
onclick="HandleThumbnailClick('{ds_RowID}');" />
You observe that I changed in both effects the target element
from tn{ds_RowID} to the special javascript keyword 'this'. I did
this to overcome the bug I told you about that you discovered in
the SpryEffects.
Let me know if you have further questions on this problem.
Regards,
Cristian MARIN