Flex :: How To Render Component With Dynamic Visibility
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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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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Feb 10, 2011
What's the call analogous to creationComplete that happens every time a component is rendered? I want to rerun a function every time the component gets rendered (it has to make an HTTP request, but the url it calls changes each time) and I can't figure out how to do it.
For context:
<s:Group 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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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 30, 2010
I'm pretty sure my dynamic mxml layout must give me two scrollbars (horizontal and vertical) but it only shows vertical one.
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="[URL]"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%" xmlns:local="*">
<fx:Script>
[Code] .....
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Mar 7, 2011
To create a similar page [URL] in Flex what are all the basic component involved , just high level is enough here is the template I guess looks like
<VBox>
<comp:Header/>
<HBox>
[Code]....
By Loading all the products into the tile List which takes lot of time to render the whole page , how to resolve this?
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Apr 11, 2010
I have HTML + CSS text. I need some lib with simple function like "Render String Var conteining HTML" So no external files (like in flash lib called HTMLwraper you just have to play your SWF on top of HTML). dinamic! I give it string it renders It into some conteiner (not as a bitmab but as if it was real HTML dynamically rendered in flash). (And I need real HTML + CSS support not what normal rich text block gives us)I am going to use it in with Flex (Flash Builder) so I like MXML component model but even pure flash AS3 will workout.It should be Free and Opensource (any license like GPL, LGPL etc will be ok).So Is out there such flashflex library for HTML + CSS dynamic rendering (rfom given String or XML)?
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Jan 6, 2010
A few hours ago I've asked how to create a custom component (textInput and label component and created a Component Definition) and with your answers I can do that now.
Problem 2: I'd like to use that component in a datagrid column so that the user can type a value in the textInput which will in turn update the underlying dataprovider. I know I should use a cellrenderer like I've done with a checkbox column
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Jul 12, 2010
I have created a timeline with visibility button against each column. The timeline.swf is loaded into two empty movieclips to create a two-screen operation. Everything works fine except, I cannot for the life of me get the visibility button on the first swf to affect the visibility for the column on the second swf.
[Code]...
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Mar 30, 2006
I'm trying to load a bunch of code from a text file. It's bombing at the point it sees the < and > characters (i.e., it just stops rendering beyond that point). I've tried the %3e and %3c solutions, no go.
Here's my code:
loadText = new LoadVars();
loadText.load("potential_win.txt");
//creating the loadVarsText function
[Code]....
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Dec 16, 2010
this concerns flash cs5 and the timeline.Everybody knows the effect you get when you use appendText() to add text to a multiline dynamic textfield, right ? Well, I have a movieClip as a container, and I would like dynamic textfields to populate this movieclip in the same manner as textStrings would populate the dynamic Textfield.
How would this work?I have buttons that trigger addChild() function so as to populate the movieclip with textfields, but how do I make sure that the textfields make up an arbitrary list as a menu user chooses which buttons to click?
Let's say this is the visible text when the swf runs.(I cut away some of the code to make this more to the point):
var buttonTrace:TextField=new TextField;
addChild(TextClip.buttonTrace); buttonTrace.x=0;
buttonTrace.y=0;
buttonTrace.text="Breadcrumbs";
Now for each time I click a button in the menu I've made, a new textfield appears with the name of the button. This is how I want it. BUT......... How do I control the display properties and positioning of dynamic textfields within a movieclip ? How do I control persistent visibility, and how do I make these textfields appear one after the other in the order they were clicked.
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Sep 11, 2009
I've done this dozens of time before but for some reason any new dynamic text boxes I make will not properly render the HTML in them even with the HTML control turned on.
I'm using CS3 with Actionscript 3, targeting player 9. I've tried AS 2, and different players all to no avail. I've tried embedding fonts, and not embedding fonts with no change in behavior noticed. I do want to use AS 3 (and wrote a bunch of code for it in a different file already), but even in a new empty file I'm still seeing this behavior.
I've made a real simple (one line!) file with a text box to demonstrate.
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Oct 19, 2009
Just to give you a little background, I am using CS4 and AS3, publishing to FP9. I am embedding fonts dynamically at runtime and there seems to be an issue with my dynamic 'html' text field when I have <b> tags within the CDATA.
In some cases, Flash seems to be rendering the bold text too close to the preceding character. Sometimes, even overlapping the preceding character. For the most part, this appears to be happening when the bold text appears at the end of the line before the text is wrapped.
I will note that, any text in the xml file wrapped in <b></b> tags is actually appearing bold, so I don't think it has anything to do with font embedding. In case it does, here is how I am embedding the font groups:
// Semi Bold
[Embed(source="/fonts/Anvers/AnversSemiBold.otf", fontName="AnversSemiBold", fontWeight="normal", fontStyle="regular", advancedAntiAliasing="true", mimeType="application/x-font")]
public static const ANVERS_SEMI_BOLD:Class;
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Mar 27, 2012
I want to create a generic component in flex. This component deals with different ArrayCollections dynamically (I want it in that way). So I thought to pass the arrayCollection and the type of that arrayCollection as arguments to the component.
Like,
var list:ArrayCollection<ClassA>;
init_Comp(list, "ClassA");
If it is possible, I can read it like this,
var newDynamicInstatnce: typeOf("ClassA") = list.getItemAt(0) as typeOf("ClassA");
Finally I have a Dynamic Instance type of that I pass. Is this possible in Flex or Is there a better way?
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Jun 15, 2010
I've created a MXML Component that consists of two TextInput boxes (user can input a "name" and "description"). I'm attempting to add and remove this component dynamically to a VBox in an MXML application. I've achieved addition thusly:
[Code]....
However, I cannot seem to get the remove() going after trying various ways with box.removeElement().
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Jul 8, 2011
I've created a custom component with several inline item renderers that I use as a tooltip. The height of the component is unknown, as the data contents of the component are not known until runtime.
However, when displaying the tooltip, occasionally it extends beyond the boundaries of the flash application, thus, I'd like to be able to detect this occurrence and reposition the tip.
The problem is that the height and width of the component are, apparently, not available until after being rendered by the popup manager. (i.e. they are always 0)But, I do not know any way of finding out when the popup is actually rendered and, therefore, the height/width values available.
[Code]...
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Jun 8, 2011
I have a custom component which contains many promptingTextInput controls. When i click a button, I want the text field of all the promptingTextInputs to become blank. (Note: I have around 60 promptingTextInputs) How do i access the controls dynamically ? I am looking for a flex equivalent of $('input[type=text]') (like in jquery).
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Jan 4, 2012
how can i change my list component in Flex 4.6 mobile project with that when an item is pressed it would dynamicly resize and show an article description and a button [URL]
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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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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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Jun 23, 2011
I have a component "child" which has a cancel button. Now this component is placed in a state called "newChildComp" I also have another component called "parent". In the parent component, i have a button that dispatches an event. Here is the event code:
[Code].....
so, basically,i am checking to see if the cancel button component in the Child component, while i am still in the parent Compoent, was clicked, if it was clicked, call the cancelButtonHandler. The problem is by the time the addNewChild handles the event, that cancel button was still null. My question is how do i solve this without using the itemCreationPolicy on the cancel button?
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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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Sep 15, 2009
I have TIFF images in the database, and I need to render them in Flex.
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