Flex :: Actionscript 3 - Flex Component Visibility On Application?
Sep 10, 2009
Is there a way to tell at runtime if a flex UIComponent is in the user's view or not.For example, if I have a tabNavigator with a combobox on each tab, is there a property of the comboBox that will tell me if it is visible to the user or not when I switch from one tab to another?I know it is not the comboBox.visible property. That is set to "true" for both comboboxes. I want a property that will change when I switch from one tab to another making the comboBox visible to the user. I don't know what that property is.
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Jul 29, 2009
I have a custom ActionScript component that I'm using in a Flex application (Flex 3.3, ActionScript 3). This component contains an Image control whose visibility is set dynamically based on a property of the data element provided to the component. The problem is that even when I set the image to be visible, it will not render onscreen. Is there something specific I need to do in order for the image to render? Snippets of relevant code below:
override public function set data( value:Object ):void {
_data = value;
if( _data ) {
if( _myImg ) {
_myImg.source = someImageClass;
[Code] .....
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Jun 2, 2010
I have a Flex repeater that has a complex item template. When a checkbox is clicked, I need to toggle the visibility of a sibling button contained in the same repeater template. Since I can't add binding expressions to event handlers, I can't pass in the repeater item's index.
How can I access sibling components inside a repeater item?
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Jan 5, 2011
I'm trying to make a Flex (Advanced)DataGrid component with some mechanism where the user can toggle the visibility of the columns. I've crudely implemented this by reading in the columns into the right-click menu, and when a column name is selected here, the visibility is toggled. It works, but it's not the most elegant solution.Specifically, I'm trying to emulate the "datagrid" that Mozilla Thunderbird uses to display emails. Here is an image:
In the upper right, there is an icon over the scroll bar. If there is no scrollbar, the icon remains in the same place. When clicking the icon, it opens up a menu that shows all the possible columns, with the visible ones having a check mark next to them, like this:
Also, the scroll bar always appears under this button, never "pushing" it over into it's own column.I'd like to re-create this in Flex. I believe the menu part and creating a column with a button headerRenderer is easy enough. But I can't figure out how (if at all possible) to do this with the scrollbar, because the scrollbar always seems to be "its own column".
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Aug 4, 2011
How I will be back in Login Page after click of logout which is in application's component.
Project.mxml
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%"
[Code]....
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Apr 30, 2010
I made a login component for my flex 4 application, and i load this component from my main flex application with:
<ns1:Login id="page_login" visible="true"></ns1:Login>
Now i want to change the visibility from true to false, from the login component.
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Aug 12, 2009
A Flex components values are initlized by init methord. In an application flow, How to refresh a mxml component data value ; as init is callled at the start up it self only.
eg. of mxml componet may be as simple as button label or text as complex as repeater whose data provider is a web service ( means a fresh quesy should be made to pull the data and refresh the dataprovider of repeater )
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Jun 9, 2010
purpose of component and module of flex app
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Dec 22, 2009
I'm making a UI for a component in Flash. I wanted to use Flex and have had no luck getting the onUpdate exernalInterface call to fire properly. I'm referencing the functionality described here: [URL]. First off, I can't embed the SWF in the FLA. It just won't start the Flex SWF. Even using the external swf, it seems that the onUpdate function is either called too early or not at all. Here's what I've tried:
Tying the externalInterfce declaration to the initialize, preinitialize, applicationComplete, and creationComplete events. Sub-classing my application and putting the externalInterface in the constructor. Neither of these options work. When I create a basic AS3 project in Eclipse and put the externalInferface in the constructor, it works as expected.
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Jul 23, 2009
I created separate own canvas component for Home page, Contact page, Rules page etc.In my main application it has link button like Home,Contact,Rules in application controller(child state) . [code]...
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Jul 28, 2009
I wonder which component to extend in Flex 3 in order to make a drawing stage.
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Jul 19, 2011
So I'm using a custom auto suggest component that I found online at [url]... The background color for the item is set within the following folder[code]...
I use this component from within a component I created called "position.mxml" that is located in a folder named "modules". Is there any way that from the position module, I can change the background color of the autosuggest box?
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May 9, 2011
I will need to execute a function in a comp1.mxml from main.mxml through event, I found it difficulty to understand and unable to get it work.[code]...
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Mar 27, 2012
i have a component which gets the data selected by the radio button
<mx:itemRenderer >
<fx:Component id="radio">
<mx:RadioButton selected="false" useHandCursor="true" change="item_changeHandler(event)">
[code]......
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Sep 7, 2010
I know it is possible to develop a full flex application using AIR for android but what I need is to embed a flex component into an already existing classic java android application.
I found some flash players in java but they all either require a JFrame or include of specific windows dlls.
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Aug 8, 2011
I would like to send variables or parameters from Component to Main (MXML) Application. Like my component is FileUpload.mxml and would like to forward the uploaded file details from FileUpload.mxml to Main.mxml.
I tried the following procedure :
com:FileUpload id="fp"
to get the reference for the FileUpload component, however, I am unable to get the variables from the FileUpload.mxml file.
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Sep 8, 2011
I'm new to developing iOS applications and my school gave me approximately 5 months to develop an iPad application. I have no knowledge or practice on Objective C so since Flash Builder 4.5 allows the development of mobile applications (and I have experiences with Flash Builder), I decided to develop my application on Flash Builder instead.
Everything is going fine until I was told to include a SplitView in my application. I implemented a List on the left side of the application. Clicking on any of the list items will navigate the user to a to another view but i also included and retained the list on the left side of the new view in order to simulate a "SplitView".
Initially it felt as though it will do the job of a SplitView like how it does when I attempted it on XCODE but it doesn't look or feel natural. I found this video which shows that it is possible to create a SplitView on FB but I've cracked my brains and I really can't figure out how it is done.
[Code]....
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Sep 13, 2010
I need to be able to call a method from a component located under the main application in Flex 4. Can anyone tell me please how to do this without using FlexGlobals please?[code]
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Dec 20, 2010
In my main application I have a viewstack with 3 child views. In the viewstack change handler, I programmatically change the selectedchild property.
I understand that the initialize method for the view is not called every time I change the selectedChild Property. So I tried to invoke the init method programmatically too..
view1.mxml
<fx:Script>
<![CDATA[
[Code].....
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Apr 18, 2010
Can I set label visibility in Flex ?
[Code]...
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Jan 2, 2012
I have and add button (last row) in one column of the AdvancedDataGrid. for the row having the add button the rest of fields are not visible. On click of the add button a new row is added to the grid for the user to add. After that this button becomes delete button (label becomes '-' and a new row is added at the bottom for adding another row). When i click on the delete button (label '-'), the last row gets the add button('+' label) but the fields of the row become visible.
[Code]...
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Mar 22, 2010
I'm just starting with Adobe Flex on linux, and can't get the hello world example to work. My application.mxml file is simply
[Code]...
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Apr 6, 2012
I have an image gallery app that has a slider to control the width of the thumbnails that ranges from 80 to 1024. As you move the slider the thumbnails width changes to effectively scaling the image between 80px and 1024px. Below the thumbnail is some information about the image such as the name, size, dimensions, etc. There is also a set of icons that do various tasks (delete, edit, copy, etc). All of this information is located within a VBox.The problem I am having is I would like to have the VBox hide when the width of the thumbnail reaches 150 px or below. This I have been able to accomplish with the following code:
<mx:VBox visible = "{thumbnail.width > 150}">The issue is that while the information within the VBox is now not visible, the real estate it takes up is not released. In other words, there is now a blank space the exact size of the VBox. What I'd like to do is to be able to release this space. I know this is probably something simple that I'm overlooking, but today my brain is just not working,
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Nov 20, 2009
I am trying to dynamically bind the visibility of a checkbox control to a data field of a repeater as follows.
[Code]...
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Jul 22, 2010
Lets suppose, there are 4 popups in my application and a viewer presses Escape once. Now i want application to close the popup which is on the top. I dont know how to accompish this because i dont know thich popup is to the front right now.
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Sep 28, 2010
I've got a tileList in a Flex 3 website. I want to programmtically turn off the visibility of a tile. So for example[code]...
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Dec 7, 2009
when we use an advanced data grid, only when we click on the parent element the children details get populated in the corresponding columns, right?..SO now i have made the empty columns invisible(at design) now how do i make them visible at run time when the parent element is expanded..similarly once the columns are visible, how can i make them invisible again when the parent element is closed.
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May 28, 2010
When I set the visible property to false for a child in a container, how can I get the container to resize? In the example bellow, when clicking on "Toggle", "containerB" is hidden, but the main container's scrollable area is not resized. (I do not want to scroll through a lot of empty space.)
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
<![CDATA[
[Code]....
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Oct 19, 2010
I have data grid that measures the height according to the rows it has, but i need to disappear/ make invisible when i have no data, so the header will not just appear alone.
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Jul 16, 2010
I am looking for a flex component to generate a barcode similar to the one below. [URL] I have found a similar plugin, at [URL]. But could not replicate the Application Identifiers by just using the "( )"
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