Scratch

The embedding process that scratch uses runs a java applet.  I don't think that most web browsers support running multiple applets at the same time from the same page.

Thanks all, I appreciate the replies.

s_federici wrote:

andresmh wrote:

Embedding works but only one project per page.

Why is this? Is this a limitation that can be overcome? Or this is due to some basic decision taken at design time?

Actually, it was a technical limitation that as of two days ago has been resolved. So now you can embed multiple projects on a page. I'd suggest not putting too many because Java is a bit heavy and I suspect running a lot projects might slow down your system considerably.

There is no such thing as the Scratch plugin. You proably mean the Scratch Java player 

andresmh wrote:

s_federici wrote:

andresmh wrote:

Embedding works but only one project per page.

Why is this? Is this a limitation that can be overcome? Or this is due to some basic decision taken at design time?

Actually, it was a technical limitation that as of two days ago has been resolved. So now you can embed multiple projects on a page. I'd suggest not putting too many because Java is a bit heavy and I suspect running a lot projects might slow down your system considerably.

I recently learned from experience that putting multiple links to existing Scratch applets on the same web page places a heavy drain on the computer.  (They all ran concurrently under FireFox)  This happens because Scratch applets start running as soon as the applet loads, and having multiple applets running at the same time was just about more than my cheap HP laptop could accommodate.

For anyone who may be interested, I moved the links to the applets onto separate html files in the same folder and then used the following code to make it possible for the reader to open those pages in a new window and view the applets individually:

<p>
<b><a name="Figure_1">Figure 1</a>. Rushes with sun by pandalecteur.</b>
<table border="1" cols="1" bgcolor="#ffffff" id="table1" >
  <tbody>
    <tr>
      <td>
<p><img border="0" src="hs10000a04.jpg" width="483" height="389"></p>
<a href=Hs10000Fig1.htm  target="_blank">Click here to view the applet. Close the page when finished viewing.</a>
      </td>
    </tr>
  </tbody>
</table>
</p>

This causes a static screen shot of the applet to appear in the main web page with a link to the auxiliary page, along with some instructions that appear immediately below the image.  It works pretty well and produces a pleasing visual effect in the document. I will be publishing the article containing this material soon.

The html on the auxiliary page that actually causes the applet to run looks like this:
<p>
<b>Figure 1. Rushes with sun by pandalecteur.</b><table border="0" cols="1" bgcolor="#EFE9B8" id="table1" >
  <tbody>
    <tr>
      <td>
<applet id='ProjectApplet' style='display:block' code='ScratchApplet' codebase='http://scratch.mit.edu/static/misc' archive='ScratchApplet.jar' height='387' width='482'><param name='project' value='../../static/projects/pandalecteur/122328.sb'></applet>
      </td>
    </tr>
  </tbody>
</table>
</p>
<p>Note, if you don't see the animation running in the box above, that probably
means that Java is not installed on your computer.</p>
<p>Be sure to close this page or at least click the red button to ensure that
the applet doesn't continue running after you leave the page.</p>

Of course, if the user starts several of the applets running at the same time, this won't keep the applets from loading down the computer.  Therefore, I provided instructions for the viewer to either close the applet page or at least click the red button before leaving the applet page.

Last edited by dbal (2008-06-19 12:15:08)