June 9, 2001 - Area Zooming | WebReference

June 9, 2001 - Area Zooming

Yehuda Shiran June 9, 2001
Area Zooming
Tips: June 2001

Yehuda Shiran, Ph.D.
Doc JavaScript

In some of your applications you may need to use Flash movies and JavaScript directly, without any prepackaged APIs such as FlashSound JavaScript API. You will enjoy more features, methods, and properties, but you'll have to take care of all the tiny details that are taken for granted when using FlashSound API, for example.

One of the "tiny" details is embedding the Flash object. The JavaScript file flashmoviecheck.js does exactly this, as well as other stuff. For example, it checks whether a Flash player exists (Flash plug-in or ActiveX control), and whether its version is higher than the minimum required by the application.

Use the Flash method SetZoomRect() to zoom in on a specified area of the movie. The syntax is:

 SetZoomRect(top, left, right, bottom)
This method zooms in on a rectangular area of the movie, starting at the top left corner and ending at the right bottom corner. All sizes are in twips (1440 units per inch), and there are 20 points to a twip.

Use the following links to play, rewind, zoom in, zoom out, and zoom to an area:

Rewind | Play | Zoom In by 2x | Zoom Out by 2x | Zoom to Area

Here is the code:

<SCRIPT LANGUAGE="JavaScript" SRC="flashmoviecheck.js"></SCRIPT>
<A href="javascript://" onclick="javascript:mySwf.Rewind(); return false">Rewind</A> | 
<A href="javascript://" onclick="javascript:mySwf.Play(); return false">Play</A> |
<A href="javascript://" onclick="javascript:mySwf.Zoom(50); return false">Zoom In by 2x</A> | 
<A href="javascript://" onclick="javascript:mySwf.Zoom(200); return false">Zoom Out by 2x</A> | 
<A href="javascript://" onclick="javascript:mySwf.SetZoomRect(0, 400, 1480, 1240); return false">Zoom to Area</A>
<SCRIPT LANGUAGE="JavaScript">
  Flash_embedSWF("swift3d.swf");
  var mySwf = window.document.sonify;
</SCRIPT>