how do you access a loaded .jpgs width and height

[rchapin]

I've searched through this forum and only found 1 reference to this problem, although it didn't really give me any clues.

What I'm doing is loading a flash movie on a webpage, passing it variables (urls of .jpgs and strings of text to be displayed with the jpgs) and then displaying them in the movie.

I need to be able to get at the width and height of the loaded .jpgs but flash doesn't seem to be cooperating.

Here's my code:

// Here we create a clip in the main movie.
_root.createEmptyMovieClip("mcInst_photoHolder0_mc", 100);
trace( "The name of our newly created movieClip is " + _root.mcInst_photoHolder0_mc._name );

// Now we'll try to load a jpg into our new movieclip
mcInst_photoHolder0_mc.loadMovie(var_photosArray[0].graphic);

// Now we'll see if we can access the width and height of said clip
trace( "The width of the .jpg in mcInst_photoHolder0_mc = " + _root.mcInst_photoHolder0_mc._width );
trace( "The height of the .jpg in mcInst_photoHolder0_mc = " + _root.mcInst_photoHolder0_mc._height );

I'm able to load the .jpg (the url of which is the var_photosArray[0].graphic ) and display it just fine.

When I try to access the _width or _height parameters I get 0.

???

 

[oldnewbie]

Have you tried your trace after you're sure the .jpg is loaded, and on another frame than the loading action itself?

 

[rchapin]

Yeah, what I've actually managed to do is run an onEnterFrame check and I'm noticing that the .jpg isn't fully loaded and initialized until after the 2nd or 3rd frame, so I think that fixed it.

Thanks!

 

[wangbar]

You can run a check on the image's load progress then fire the action that reads the width and height when it's fully loaded:

checkLoad = function () {
	if (loadPoint.getBytesLoaded()>=loadPoint.getBytesTotal()) {
		clearInterval(loadInterval);
		trace(loadPoint._height+" "+loadpoint._width);
	}
};
loadPoint.loadMovie('image.jpg');
loadInterval = setInterval(checkLoad, 250);

Using setInterval here is slightly more efficient that running an event every frame (especially if you're using a high framerate).