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TextInput validation: keyboard typing or copy-paste?

Mar 9, 2010 2:33 PM

Hi all. In my application, I want to check the username and password input. I hope the app only accept the human keyboard typing input for the username and password, and refuse the copy-paste input.

What is the approach for this? Any suggestion is appreciated. Thank you.

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Arun Lal,

Community Member

Mar 9, 2010 10:25 PM

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<mx:TextInput id="txtIp" change="txtChangeHandler(event)"/>

    <mx:Script>
        <![CDATA[
            private var controlFlag:Boolean = false;
            private function init():void{
                this.addEventListener(KeyboardEvent.KEY_DOWN,kbdHandler);
                this.addEventListener(KeyboardEvent.KEY_UP,kbuHandler);
            }
            private function kbdHandler(event:KeyboardEvent):void{
                if(event.keyCode==Keyboard.CONTROL){
                    controlFlag = true;
                }
                if(controlFlag && event.keyCode==Keyboard.V){
                    event.preventDefault();
                }
            }
            private function kbuHandler(event:KeyboardEvent):void{
                if(event.keyCode==Keyboard.CONTROL){
                    controlFlag = false;
                }
            }
            private function txtChangeHandler(event:Event):void{
                //
            }
        ]]>
    </mx:Script>

Try with this logic.. Let me know if it helps

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kingsz1,

Community Member

Mar 11, 2010 4:17 PM

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Thank you. your advice is helpful.

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GargMonika,

Mar 12, 2010 5:58 AM

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I am not able to get this functionality by using your code.

Keyboard.V is not available.
Can you please tell me the solution.
I tried with the Key code value for V is 72 but still it doent prevent me for copy-paste.

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kingsz1,

Community Member

Mar 13, 2010 3:07 AM

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hi, you can get more detail of keyboard control from "Programming ActionScript 3.0", the docment from Adobe
http://livedocs.adobe.com/flex/3/html/help.html?content=Part6_ProgAS_1 .html

look at chapter 22 - "Capturing user input" there are some codes to check user key typing.

I am not able to prevent copy-paste, but from keycode, we know copy-paste use CTRL and v key.

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TextInput validation: keyboard typing or copy-paste?

Mar 9, 2010 2:33 PM

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