Adobe help document said, "When a component calls an invalidation method, it signals to Flex that the component must be updated. When multiple components call invalidation methods, Flex coordinates updates so that they all occur together during the next screen update."
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I am new in flex and recently read about Validation and Invalidation in components.
View 2 RepliesCreate a tab navigator (or viewstack, whatever) and add a couple tabs. On your tab add a show event handler. Inside the event handler call invalidateProperties() and invalidateDisplayList() on one of the children of your tab. Put a break point on the childs commitProperties() and updateDisplayList(). You'll notice that the updateDisplayList() gets called before commitProperties() which results in incorrect behaviour.
I noticed this problem when setting a DataGrid's dataprovider from inside the show handler. Setting the dataProvider causes the grid to invalidate both properties and displayList, updateDisplayList() will get called first, then commitProperties() which will result in the grid not updating the rows. It appears the root of the problem is that the show event gets dispatched from within LayoutManagers validateDisplayList() loop, so invalidating a child object from within the show handler results in its updateDisplayList() getting called immediately.
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I have an ArrayCollection containing bindable objects. I would like to access them in multiple places like below (there's only one label for clarity). How can I achieve that?hould I write some kind of wrapper for ArrayCollection dispatching special event (which?) catchable by Flex event mechanism.
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
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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".
there's a need to select a mechanism, allowing user to hide/show columns in a DataGrid.One of suggested ways is adding a button (which looks like a column header, but with no column). When user clicks on it, the list of columns comes and user may select columns to hide/show. But is there any way to have such column in a grid (just a header with no column .. as example - you may see the grid in Mozilla Thunderbird)?
The other, less likely way, was the popup list, appearing when mouse hover the DataGrid. But this list would be used rarely. So, this flashing list would be just a headache for an end-user.
The ways with mouse-clicking .. I'm just afraid, that they would be left unnoticed and user would have a hard days while using a grids with a dozens columns.
Edit #1Maybe it would be better if I just provide a pic of this magical "header with no column", to escape confusion ..
Here's it .. there's a clickable column-header in a grid, but there's no column under it ..
Edit #2There's some area right above scrollbar in the dataGrid, it might be the right place for putting this functionality .. but it seems like I can't use it.
I have four event handlers that are fired sequentially after four different process have been completed. After each complete process I want to change the value in a text box on the stage. I put break statements at all the lines where I want to change the value of the text box. The program stops at the right breakpoints in the correct order. The problem I have is that when I remove the breakpoints and run the app normally the textbox does not update after each process.
At the end of the fourth process the textbox is filled with the four lines of text from each event handler. Why is my text box not updating after each event and only after the last event when clearly from my breakpoints it executing the text update code in the correct order??
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I have a question: I want to create a game in which you should find 100 diamonds. Every time you find a diamond, it enters to the inventory and the numbers of founded diamonds is updated on the screen.How do I update the number on the screen?On Adobe Flash ofcourse
View 2 RepliesI'm not 100% sure thats the problem, but It seems so. One other thing it could be, is maybe the screen doesnt update untill an event listener has completely finished?
Anyway here is my problem: My app does some pretty heavy calculations when the user clicks on a certain button. From testing, the calculation can take up to 3 seconds to complete. What I want to happen is, as soon as the user clicks the button, a "please wait" appears in the middle of the screen. 3 seconds later, after the calculations have completed, the "please wait" sprite disappears again.
However I cant seem to make that happen. Right now, when the user clicks the button, the please wait sprite does not show up at all. Using trace statements I'm pretty sure whats actually happening is, after the 3 seconds of calculations, the please wait sprite is set to visible and then invisible at essentially the same time, so you dont actually get to see it on screen.
Heres the code:
Code:
private function mouseDownListener(e:MouseEvent):void {
pleaseWaitSprite.visible = true;
trace("now visible");
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The trace statements "now visible" and "now invisible" show up at exactly the same time in the output window, even though there is 3 seconds of calculations between them. I guess the same thing is happening with the visible code.
Ive tried e.updateAfterEvent() but not surprisingly that didnt help. I think I need something more like e.updateDuringEvent() ... ?
It pulls a library item out of the library and puts it on stage programmatically. No big deal, except that in order to get the image displayed on the screen to actually update, I had to removeChild() and then addChild() it back. Is there another way to force the screen to redraw?
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I am working on a character terminal emulator. Glyphs are 8x8, 1bit raw bitmaps There are 256 glyphs in the palette. A character buffer is a grid of single bytes, referencing the various glyphs in the palette 256 glyph palette.Essentially a character buffer is a big blocky bitmap, only instead of pixels it has glyphs.Rendering the character buffer is a rather quick, self-contained job in theory. The memory required is very low and the execution time is similar to a hardware blit.
It is redundant to have a 'back buffer', i.e. a BitmapData to store a rendering of the character buffer. it's too costly in memory and way overkill for the complexity of what is being rendered.I want to know if it is possible to feed data to the video memory similar to the way it is done with SampleDataEvents. I do not want to store a redundant BitmapData object since some of these character buffers are huge and rarely need to be rendered all at once. They only need to be 'invalidated', i.e. they only need to update small portions at a time as they are 'exposed'.
I have searched high and low and read the manual a million times. The closest thing I could find were the stage.invalidate() and RENDER events, but they don't seem to give me a rectangular area to feed data to. I also tried extending Bitmap, but could not figure out how to override it's default behaviour of reading pixels from a BitmapData.An example of what I'm doing can be found when using GTK's DrawingArea widget and it's 'expose' events, used for very fast rendering.
I'm having a problem that involves scrollRect and getBounds. In short, getBounds is reporting an old value not accounting for scrollRect changes during that frame. Example:
ActionScript Code:
var shape:Shape = new Shape();
shape.graphics.beginFill(0);
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Is it possible to use any IPC mechanism for calling a c++ api from Adobe Flash actionscript? Are there any good examples?
Update: I primarily want it for desktop apps now i.e Adobe's/or anyuone else's desktop runtimes
Making an Flex App. Just wondering if anyone has created something that fits automatically to the users' screen size and how I go about doing this? One of the principle things is that I need an background image, which is obviously going to have to scale / resize to match the users screen.
View 1 RepliesHow can I accomplish complicated loading and unloading mechanism? for example section number one is divided into the blocks. so when you hit the menu button, section is loading by parts...left part, after that center part and then right. when you press next menu button, first of all this section is unloading... center part, then right part, then left part and after that section number two begin to load in a different manner. so question is how can i control that? for loading and unloading i have got functions load_main() unload_main() load_contacts() unload_contacts()
View 5 RepliesHello I am wondering if any of you know of a way to turn the throttle down (sleep) mechanism off when a C++ app is hosting the flash activeX control. The flash control is invisible in this case and so the flash app will throttle down. Tinic Uro does not seem to be answering questions related to work arounds for apps that might not want flash to throttle down.
This is especially annoying when you are hosting the flash control in your own application.
I have what seems a straighfoward situation: I update the source property of an image, when the image is loaded i want to redraw the border skin to fit the new size of the image.
newImgEdit.addEventListener(Event.COMPLETE, loadImgComplete);
newImgEdit.source = myurl_ressource;
private function loadImgComplete(evt:Event):void {
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I am deploying Updates via SCUP and SCCM to hundreds of Computers. Fortunately Adobe provides an SCCM Update Catalog for both Adobe Flash ActiveX and Adobe Flash Plugin. But now my Problem: After publishing the Update via SCCM, the client is not supposed to be interfered with the Update Progress (which is working) I figured the Updater works like this: First SCCM checks if a Update needs to be deployed, if this is the case, The Flash Updater begins. First the old Flash Version is beeing uninstalled. But now: if the Client has a Browser Window (IE, or Firefox) open, the Updater is not able to install the new Flash Version and quits with an Error. This leaves the Client PC without any Flash (because its being uninstalled before) How can I prevent Flash being uninstalled due to the Update progress not working while a Browser window is open?
View 1 RepliesI've got a movieclip, which has got a dynamic text element.The movieclip uses a package for its codeThe package if obviously derived from the MovieClip classI've got a timer, that updates the dynamic text field every second.When debugging the code, I see that the timer works well. Its updates the value of the dynamic text field.
View 2 RepliesI build a web site in flex that some time take input. Will this website works on Touch Screen environment(KIOSK).My question is we have to make any change to handle input such as prompt on screen keyboard when input fields are get focused or it will manage my device and OS of system(KIOSK, Touch screen system) itself.
View 2 Repliesi've done some simple apps to get the felling of it, nothing involving updating a file or a database.I wanted help, how to do a query to a MySql DB from a Flex application (thats gonna be running in a web server).I didn't saw any duplicated questions, sorry if any exists, just point me to it.
View 5 RepliesI want to include a "continue" mechanism in my game. Like, when someone turns my game off and plays it again, after a day or two, it should continue from the point it was on before the game was turned off.
View 1 RepliesI've created a AS3 class which extends UIComponent so that I can easily add it to my MXML layout. It works fine, but I'm trying to figure out how to update the UIComponent width and height dynamically. I want my super UIComponent to draw a border around the content, so I need get the specific 'content' dimensions in order to do this.
I understand the idea of UIComponent is that you are supposed to specifically set the width and height... but I am literally only extending it so that I am able to use my custom component with MXML easily.Is there a method in which I can get the width and height of a UIComponents 'content'?
I have been trying to find a way to connect Flex to sharepoint in an elegant way that allows me to update lists, build charts, and create widgets with FLEX on the client-side. I have researched this extensively but I am running into circles.
I understand the basics of Flex data connection/webservices/etc... , I just can't seem to get my head around how to use the sharepoint list services.
How can I add new nodes/elements/properties to the existing xml file at runtime in flex. I have a xml file which is used to display components in flex. I want to add/edit component and their properties at runtime.
xml file sample:
<view id="productView" label="Products">
<panel id="chartPanel" type="CHART" ChartType="Pie2D" title="Productwise Sales" x="215" y="80" width="425" height="240" showValues="0" >
< /panel>
< /view>
To add new component I have created an object with all the properties and elements of components. How can I convert this object in xml format and update the existing xml file?
I create a custom component to override the linkButton to make it behave that if an exist value is found, it would shown as "Added".
By default the button label is "Add to cart", I could not make the button become "Added" after trying many trial and error on uHandler which I suppose, COMPLETE, ENTER_FRAME, CREATION_COMPLETE could not even update the label.
public class Btn extends LinkButton{
public function Btn(){
super();
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i have the following code:
<mx:Repeater id="user" dataProvider="{data}">
<mx:VBox styleName="repeaterVBox">
<mx:Text text="{user.currentItem.a}. {user.currentItem.b}"
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the dataProvider 'data' updated itself every 3 seconds, so every 3 seconds that is a flicker of some sort, i see for a really short time an empty area and then it gets redrawn again. is there a way to make the update somewhat faster ?
I have datagrid binded with data acquired from web service which, as you may suspectretrieves data from some db. Datagrid has some editable columns and I want to update db through appropriate web service call without adding button "Update" as a last column in datagrid.
View 1 RepliesOverview: The code giving me the problem is deployed here: [URL] The problem I am running into is that a certain sequence of actions (I don't fully understand how or why) is causing my calls to invalidateDisplayList to fail to produce a subsequent call to updateDisplayList. What I know is that during this period, some other visual effects will fail to occur (such as changing the width of a component or the addition of a new child).
Example: The program below draws two columns of horizontal lines. The column on the left is drawn during commitProperties, the column on the right is drawn during updateDisplayList. A certain sequence of actions can cause the right column to stop updating.
To trigger this bug: First add a new item. Now hit the start button and a bar starts filling up. If you press the add row button, the right column and the filling bar both stop growing. The left column continues unfettered. The extra component won't appear until the last line of the if statement in TEComputeRow.tick() doesn't execute for a frame. Click on the stop button to halt the execution of the block inside the if statement in TEComputeRow.tick() and everything goes back to normal.
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I have a custom <mx:DataGrid /> that is updated with data from a ColdFusion server every 60 seconds. I've noticed that every time the DataGrid updates and redraws the scroll position is reset to the top.
Is there a way I can preserve the scroll position for my DataGrid?