Multiline handwriting

Question

I need to develop an animation in Flex that mimics someone's handwriting textarea with dynamic content. I don't care about the pen by following the actual font curves, but I need a clean way to show text line by line , with a mask that follows the position of the pen.

Something like this, but with native textarea and my own font:

http://activeden.net/item/handwriting-animation-tool-v25/11733

textarea in mxml can have only one mask, so I assume that I should create the mask programmatically. Has anyone else done this?

Thank you

Answer 1

- , , -. , . Flex - , . :

<fx:Script>
    <![CDATA[
        import mx.graphics.SolidColor;

        import spark.components.Group;
        import spark.components.RichText;
        import spark.primitives.Rect;

        private function createMultilineMask():void
        {               
            var txt:RichText = new RichText();
            txt.x = 20;
            txt.width = 260;
            txt.text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque tempus, eros ac dignissim interdum...";
            txt.setStyle('fontFamily', 'Times');
            txt.setStyle('fontStyle', 'italic');
            txt.setStyle('fontSize', 16);
            txt.setStyle('color', 0xFF0000);                

            var textMask:Group = new Group();

            var ln1:Rect = new Rect();
            ln1.x = 0;
            ln1.y = 0;
            ln1.width = 0;
            ln1.height = 14;
            ln1.fill = new SolidColor(0x000000);
            textMask.addElement(ln1);

            var ln2:Rect = new Rect();
            ln2.x = 0;
            ln2.y = 20;
            ln2.width = 0;
            ln2.height = 14;
            ln2.fill = new SolidColor(0x000000);
            textMask.addElement(ln2);

            var ln3:Rect = new Rect();
            ln3.x = 0;
            ln3.y = 40;
            ln3.width = 0;
            ln3.height = 14;
            ln3.fill = new SolidColor(0x000000);
            textMask.addElement(ln3);

            var container:Group = new Group();
            container.x = 100;
            container.y = 100;
            container.mask = textMask;
            container.maskType = 'clip';
            container.addElement(txt);
            addElement(container);

            addEventListener(Event.ENTER_FRAME, drawLine);

            function drawLine(event:Event):void
            {
                if (ln1.width < 300)
                    ln1.width += 2;
                else if (ln2.width < 300)
                    ln2.width += 2;
                else if (ln3.width < 300)
                    ln3.width += 2;
                else
                    removeEventListener(Event.ENTER_FRAME, drawLine);
            }
        }
    ]]>
</fx:Script>

FTQuest