How do you determine the line height (in pixels) of the text in a Spark Label?
keyle's answer will only give you the height of the text, not the actual 'lineHeight' style. You can easily get that style like this:
myLabel.getStyle("lineHeight");
The problem is that this can return a relative value (a percentage) or an absolute value (in pixels). The default - if no lineHeight was explicitely set - is "120%"
.
So here's how we can get the value in pixels in both cases:
var lineHeightStyle:* = myLabel.getStyle("lineHeight");
//its already a value in pixels
if (lineHeightStyle is Number) var lineHeight:Number = lineHeightStyle;
//it's a relative value: let's calculate
else {
var lineMetrics:TextLineMetrics = myLabel.measureText(myLabel.text);
//get the numeric value from the string and divide it by 100
var ratio:Number = int(lineHeightStyle.match(/\d+/)[0]) / 100;
lineHeight = lineMetrics.height * ratio;
}