AS3 auto resize text in textfield

Question

This is the code I use to automatically fit text into a textfield with a fixed width and height:

package { import flash.text.TextField; import flash.text.TextFormat; import flash.display.Sprite; public class AutoResizeText extends Sprite{ public function AutoResizeText() { var textField:TextField = new TextField(); var textFormat:TextFormat = new TextFormat(); textField.text = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'; textField.wordWrap = true; textField.multiline = true; textField.width = stage.stageWidth/2; textField.height = stage.stageHeight/8; textField.x = stage.stageWidth/4; textField.y = stage.stageHeight/4; textField.border = true; textFormat.size = 10; textField.setTextFormat(textFormat); autoResizeTextField(textField, textField.width, textField.height, false, true); addChild(textField); } public function autoResizeTextField(textField:TextField, fieldWidth:int, fieldHeight:int, bOneLine:Boolean = false, bResizeBigger:Boolean = false):void{ //checks if wordwrap is set to true if(textField.wordWrap == true){ var textFormat:TextFormat = textField.getTextFormat(); if(textField.textWidth > fieldWidth || textField.textHeight > fieldHeight || (bOneLine && textField.numLines > 1)){ while(textField.textWidth > fieldWidth || textField.textHeight > fieldHeight || (bOneLine && textField.numLines > 1)){ textFormat.size = int(textFormat.size) - 1; textField.setTextFormat(textFormat); } } else if(textField.textWidth < fieldWidth && textField.textHeight < fieldHeight && bResizeBigger){ while(textField.textWidth < fieldWidth && textField.textHeight < fieldHeight && !(bOneLine && textField.numLines > 1)){ textFormat.size = int(textFormat.size) + 1; textField.setTextFormat(textFormat); } if(textField.textWidth > fieldWidth || textField.textHeight > fieldHeight || (bOneLine && textField.numLines > 1)){ textFormat.size = int(textFormat.size) - 1; textField.setTextFormat(textFormat); } } } else{ //gives an error throw new Error('wordWrap needs to be set to true in order to auto resize a textfield!'); } } } }

For some reason, only the text until the comma is shown, the text after that is cut off. What causes this?

@BotMaster even when I set multiline to false, it doesn't work — c4isgonnablow
– c4isgonnablow, Commented Mar 2, 2015 at 19:40

Glen Blanchard · Accepted Answer · 2015-03-02 20:54:39Z

The textWidth property doesn't include the padding in all TextFields. From memory there is 2px padding so if you set your fieldWidth -= 4 and fieldHeight -= 4 it should work.

public function autoResizeTextField(textField:TextField, fieldWidth:int, fieldHeight:int, bOneLine:Boolean = false, bResizeBigger:Boolean = false):void{ // Allow for padding of TextFields fieldWidth = Math.max(0, fieldWidth - 4); fieldHeight = Math.max(0, fieldHeight - 4); //checks if wordwrap is set to true if(textField.wordWrap == true){ var textFormat:TextFormat = textField.getTextFormat(); if(textField.textWidth > fieldWidth || textField.textHeight > fieldHeight || (bOneLine && textField.numLines > 1)){ while(textField.textWidth > fieldWidth || textField.textHeight > fieldHeight || (bOneLine && textField.numLines > 1)){ textFormat.size = int(textFormat.size) - 1; textField.setTextFormat(textFormat); } } else if(textField.textWidth < fieldWidth && textField.textHeight < fieldHeight && bResizeBigger){ while(textField.textWidth < fieldWidth && textField.textHeight < fieldHeight && !(bOneLine && textField.numLines > 1)){ textFormat.size = int(textFormat.size) + 1; textField.setTextFormat(textFormat); } if(textField.textWidth > fieldWidth || textField.textHeight > fieldHeight || (bOneLine && textField.numLines > 1)){ textFormat.size = int(textFormat.size) - 1; textField.setTextFormat(textFormat); } } } else{ //gives an error throw new Error('wordWrap needs to be set to true in order to auto resize a textfield!'); } }

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