This extension class displays a texture that is trimmed towards the left side (depending on a ratio value). This can be used to create a progress bar or a rest-time display.

You control the gauge by changing its ratio property to a value between 0 and 1.

var gauge:Gauge = new Gauge(texture);
gauge.ratio = 0.5;
addChild(gauge);

In the sample on the right, the gauge is just the yellow texture. By displaying this object in front of a grey background and border, it looks as if this was a container that grows empty.

• 2012/04/05: First public version

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@ekeeper: upgraded version - https://gist.github.com/ekeeper/5212291