Re: Problem with Image display on separate window

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

I finally got the setTimeout to work and it seems to work pretty well.

I am curious as to why the large image loads quick after the first time it
loads on any machine. I assume it is cached on the local machine and have
been trying to get rid of it for testing by going to tools/"internet
options" and press the Delete Temporary Internet files including offline
content. But this doesn't seem to work.

Anyone know how to get rid of the Cache that my local machine is using (if
in fact that is what happened).

Here is what I did to fix my image load problem using setTimeout - might
help someone else.
***************************************************************
<script language="JavaScript">
//window.resizeTo(400, 400);
var id;
var ktr = 0;

function entry()
{
document.PictureDisplay.src = "..\\..\\uploads\\" +
opener.document.getElementById('CompanyPicture').innerHTML;
id = document.getElementById("PictureDisplay");
setTimeout("resizeIt()",50);
}
function resizeIt ()
{
ktr=ktr+1;
if (ktr > 3000)
{
// alert("ktr in resizeIt = " + ktr);
return;
}
if (id.readyState != "complete")
{
// alert("ktr in resizeIt = " + ktr + " readyState = " + id.readyState);
setTimeout("resizeIt()",50);
}
else
{
w = id.width+10;
h = id.height+50;
// alert ("w = " + w + " h = " + h);
window.resizeTo(w,h);
if (screen) {
x = (screen.availHeight - h)/2;
y = (screen.availWidth - w)/2;
}
window.moveTo(y,x);
window.focus();
// alert("id ReadyState = " + id.readyState + " ktr = " + ktr);
}
}
</script>
</head>
<body onLoad="entry()">
<img name="PictureDisplay">
</body>
</html>
************************************

Thanks,

Tom
"tshad" <t@xxxxxxxx> wrote in message
news:%23QoLe8wTHHA.4756@xxxxxxxxxxxxxxxxxxxxxxx
"bruce barker" <nospam@xxxxxxxxxx> wrote in message
news:ejcUTlwTHHA.2256@xxxxxxxxxxxxxxxxxxxxxxx
you need to use a window.setTimeout() to do the loop. a better approach
is to render the image size with the name, so that when client script
opens the img, it can pre-specify the size which has better usability.

Not sure what you mean on the pre-specifying the size.

But I couldn't really get the setTimeout to work or using a pause type of
scenario and I assume this is why others couldn't either. What happens is
when you are in a loop (while loop or for loop of x iterations to simulate
milliseconds) it seems to be gobbling up the cpu (as it is running as fast
as it can) and no work gets done until the loop is finished.

For example, I tried:

********************************
function entry()
{
document.PictureDisplay.src = "..\\..\\uploads\\" +
opener.document.getElementById('CompanyPicture').innerHTML;
id = document.getElementById("PictureDisplay");

for (var x = 1; x <= 10; x++)
{
if (id.readyState == "complete") break;
pauseIt(10000);
}

alert("id after for loop ReadyState = " + id.readyState + " x = " + x);
w = id.width+10;
h = id.height+50;
// alert ("w = " + w + " h = " + h);
window.resizeTo(w,h);
if (screen) {
x = (screen.availHeight - h)/2;
y = (screen.availWidth - w)/2;
}
window.moveTo(y,x);
window.focus();
alert("id ReadyState = " + id.readyState);
}
function pauseIt(millis)
{
var date = new Date();
var curDate = null;

do { curDate = new Date(); }
while(curDate-date < millis);
}
***********************************************

This would come back as uninitialized after the for loop and would still
seem to work fine. The last alert would show it as complete.

I need to find a way to make it wait about 10 seconds for each loop
(without some time of other loop) while the image is being loaded. In
this case, it will usually only use one loop to load the image. It is
normally loaded in about 1 or 2 seconds (if even that long - if cached).

Thanks,

Tom


-- bruce (sqlwork.com)


tshad wrote:
"bruce barker" <nospam@xxxxxxxxxx> wrote in message
news:eWMnBUuTHHA.3592@xxxxxxxxxxxxxxxxxxxxxxx
you are correct. setting the src starts a download, you should check
readyState of the image before checking the size.

I have been reading on this and found there are problems trying get this
to work. Correctly. Sometime looping causes infinite loops and out of
memory errors.

Is there a way around this?

Also, is there some type of hide window function? I am trying open the
window in a hidden state until the image is loaded and resized before I
display it. Right now I get this sort of post back type of look where
the window is opened and then resized and the window that called it is
redrawn and it looks clumsy.

Thanks,

Tom
-- bruce (sqlwork.com)

tshad wrote:
Could this be that the image is not totally loaded yet?

The first thing it does is load the image into the image tag:

document.LogoDisplay.src = "..\\..\\uploads\\" +
opener.document.getElementById('Logo').innerHTML;

Then it gets the size of the image:

id = document.getElementById("LogoDisplay");
w = id.width+10;
h = id.height+50;

is it possible by the time I get to this set of code only part of the
image is loaded and the all subsequent times it is getting the image
from some cache that is quicker?

I can't think of any other reason that would cause this?

Thanks,

Tom

"tshad" <t@xxxxxxxx> wrote in message
news:%23SHCO8tTHHA.5108@xxxxxxxxxxxxxxxxxxxxxxx
This was posted before but the message got messed up (all NLs were
stripped
out for some reason).

I have 2 labels that hold the name of different images on my .aspx
page.

<asp:Label ID="Logo" runat="server"/>
<asp:Label ID="CompanyPicture" runat="server"/>

I have 2 links that open the windows to preview these images. The
previewed
images are done on separate html pages that do nothing but display
the
image.

function OpenLogoPreviewWindow()
{

window.open('logoDisplay.htm','myWindow','menubar=no,toolbar=no,directories=no,resizable=no,scrollbars=no,location=no,status=no');
}
function OpenPicturePreviewWindow()
{

window.open('CompanyPictureDisplay.htm','myWindow','menubar=no,toolbar=no,directories=no,resizable=no,scrollbars=no,location=no,status=no');
}

This works most of the time. But the first time you do it, it has
the wrong
dimensions. For example, for the CompanyPicture - the size is 502 by
400.The very first time a machine loads this picture, it will be
incorrect.
It will be something like 38 by 87. From that point on it will be
correct.
Even if I change the picture - it will size it correctly. It will
also work
correctly if I reboot the machine.

To test it I need to go to another machine that has
never run it. The code for each page is:

LogoDisplay.htm
*********************************************************
function entry()
{
//alert("In LogoDisplay");
document.LogoDisplay.src = "..\\..\\uploads\\" +
opener.document.getElementById('Logo').innerHTML;
id = document.getElementById("LogoDisplay");
w = id.width+10;
h = id.height+50;
// alert ("w = " + w + " h = " + h);
window.resizeTo(w,h);
if (screen) {
x = (screen.availHeight - h)/2;
y = (screen.availWidth - w)/2;
}
window.moveTo(y,x);
window.focus();
}
</script>
</head>
<body onLoad="entry()">
<img name="LogoDisplay">
</body>
</html>
*********************************************************

CompanyPictureDisplay.htm
**********************************************************
function entry()
{
document.PictureDisplay.src = "..\\..\\uploads\\" +
opener.document.getElementById('CompanyPicture').innerHTML;
id = document.getElementById("PictureDisplay");
w = id.width+10;
h = id.height+50;
// alert ("w = " + w + " h = " + h);
window.resizeTo(w,h);
if (screen) {
x = (screen.availHeight - h)/2;
y = (screen.availWidth - w)/2;
}
window.moveTo(y,x);
window.focus();
}
</script>
</head>
<body onLoad="entry()">
<img name="PictureDisplay">
</body>
</html>
****************************************************************

Thanks,

Tom










.

Relevant Pages

  • Re: Problem with Image display on separate window
    ... IE7 puts an address bar at the top of the picture below the title bar. ... I am curious as to why the large image loads quick after the first time it ... is when you are in a loop (while loop or for loop of x iterations to ... is there some type of hide window function? ...
    (microsoft.public.dotnet.framework.aspnet)
  • Re: gcc inlining heuristics was Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning
    ... arrays are independent and then give the loop optimizer ... Any function that does several interleaved loads and stores ... through different pointers could have much more freedom to ... The point is that the compiler is then free to do it. ...
    (Linux-Kernel)
  • Re: I-lookup
    ... > Everytime I open un the internet, it loads up with the I- ... Your download should start in a minute.. ... Double click on this icon. ... right of the window you will see a "Start" buttonand right above that the ...
    (microsoft.public.windowsxp.security_admin)
  • Re: SMPS with two control loops
    ... >The current loop is stable, 0 to 25A at short circuit to open circuit, ... >caps/resistor values around the voltage error amplifier until the thing ... At light and zero loads, a voltage regulator runs into a brick wall, ...
    (sci.electronics.design)
  • Linux 2.6.38-rc1
    ... and the merge window for 2.6.38 is thus closed. ... heavy loads like a "make -j8" or similar) by giving tty sessions ... RCU-based path name lookup. ... And several updates to the Intel driver too. ...
    (Linux-Kernel)