I'm loading a large image into a canvas. When the image loads, I want
to center the image inside the view port. Here is how I have the image
defined:
<mx:Canvas id="viewport" width="100%" height="100%"
vScrollPolicy="off" hScrollPolicy="off">
<mx:Image id="mapImage" source="{mapPath}"
mouseDown="handleMouseDown()"
mouseUpSomewhere="handleMouseUp()"
mouseMoveSomewhere="handleMouseMove()"
/>
</mx:Canvas>
I've tried a code to center items like so:
function center() {
var viewPortWidth:Number = viewport.width;
var viewPortHeight:Number = viewport.height;
var thisWidth = this.mapImage.width;
var thisHeight = this.mapImage.height;
var newX = Math.round((viewPortWidth - thisWidth) / 2);
var newY = Math.round((viewPortHeight - thisHeight) /
2);
this.mapImage.x = -1 * newX;
this.mapImage.y = -1 * newY;
Echo.debug("new coord "+newX +","+ newY+" the width was
"+thisWidth);
}
However, I noticed that width was 0, so I got unexpected results. Do I
need to wait for the image to finish loading? If so - how/when would
I run center?
--
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Raymond Camden, Director of Development for Mindseye, Inc (www.mindseye.com)
Member of Team Macromedia (http://www.macromedia.com/go/teammacromedia)
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Blog : ray.camdenfamily.com
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