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POIn Actionscript 2, why is this TextField _height inconsistent?
 

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  1. POIn Actionscript 2, why is this TextField _height inconsistent?
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    <p>I've created a dynamic text field, and set autoSize to true, so it can grow was tall as necessary. I then want to use the _height value to size a container graphic (speech bubble).</p> <p>Here's the (simplified) code:</p> <pre><code>var format:TextFormat = new TextFormat("Arial", 14); format.color = 0x000000; format.letterSpacing = -0.2; var txt:TextField = _root.createTextField("dialog_txt", 150, 10, 10, 150, 0); txt.multiline = true; txt.wordWrap = true; txt.autoSize = 'left'; txt.embedFonts = true; txt.selectable = false; txt.text = value; txt.setTextFormat(format); </code></pre> <p>I then try to set my container's height to the height of the textfield + 5, but it comes out way too short.</p> <pre><code>container._height = txt._height + 5; </code></pre> <p>I found that by adding <code>trace(txt._height)</code> before, the values come out right, even though the trace value is too small. Even just assigning the txt._height to a temp variable (<code>var junk=txt._height;</code>) fixes the problem. Replacing that with a couple trace functions:</p> <pre><code>trace(txt._height); //Note: No code between these two calls trace(txt._height); </code></pre> <p>Returns <code>19.6</code> followed immediately by <code>35.2</code>. It's as though reading <code>txt._height</code> causes it to recalculate, so it's correct the second time.</p> <p>I also tried the <code>textHeight</code> property, which also seems to get recalculated after <code>_height</code> is accessed. This sequence, for example:</p> <pre><code>trace(txt.textHeight); // Returns 15 trace(txt.textHeight); // Returns 15 trace(txt._height); // Returns 19.6 trace(txt.textHeight); // Returns 31 trace(txt._height); // Returns 35.2 </code></pre> <p>This is in AS 2, being compiled by <a href="http://www.mtasc.org/" rel="nofollow" title="MTASC">MTASC</a>.</p> <p>Any ideas on what's going on here?</p>
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