Set control to visible : Spark component « Components « Flex

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Flex » Components » Spark component Screenshots  Set control to visible             <?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white">     <mx:HBox creationComplete="checkEmail()">         <mx:Script>                          import flash.net.*;             private function checkEmail():void             {                 if(data.email.length > 0)                 {                     emailButton.visible = true;                 }             }             public function sendMail():void {                 var u:URLRequest = new URLRequest("mailto:" + data.email);                 navigateToURL(u,"_self");             }                    </mx:Script>         <mx:Button id="emailButton" visible="false" label="Send Email" click="sendMail()" />     </mx:HBox> </mx:Application>                                                          Related examples in the same category 1. Basic format of an MXML application that uses the Spark component set 2. Use MX DataGrid with Spark Application, VerticalLayout, and Button components 3. Use id to reference control 4. Id property for Button 5. Create a Spark Button control in MXML. 6. nonzero padding and gaps 7. Percetage width 8. Set min width 9. Get UI controls's width 10. Visible properties 11. Percentage-based sizing 12. Using various Alpha properties 13. Using the id property with MXML tags 14. Set component properties as tag attributes 15. Set the property using the value of the static constant 16. Explicitly specify the default property 17. Use ActionScript String to insert a newline character 18. Convert calculation result to String and set to Label 19. Use this[control label] to reference controls declared 20. Id property for Control 21. Call the initDate() function and writes a message in flexlog.txt 22. Log the component sizes to flashlog.txt 23. Use width and height properties to explicitly set its size 24. Convert object to Flex Display Object 25. Create Components From Descriptors 26. Use percentage to control the width 27. Setting enabled to false makes a component unavailable. 28. visible controls whether an item is visible on stage 29. Border properties set in MXML mark-up 30. Use child tags with the dot notation to define property overrides 31. Use the x and y properties to reposition a Button control 32. Set Pane and Button properties 33. A linker dependency on the Button control