[flexcoders] Custom List ItemRenderer / Recycling troubles (height incorrect)
I'm attempting to create a very simple item renderer for mx:List. I've found
that when the dataProvider is static, there are no problems with the custom item
renderer. However, when the dataProvider is dynamic, the height of the item
renderer is not correct (and scroll bars appear for each renderer with any
meaningful # of rows). I've set variableRowHeight=true for the List. I've
also tried overriding the measure function and invaliding the size when a
dataChange event is dispatched (based on information provided on FlexCoders in
previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe.com/2006/mxml; width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable to glean the
magic sauce that makes the item renderer function correctly when the control
recycles. Can someone explain / provide a functional example(s) with mx:Text
(ActionScript and MXML examples preferred, for completeness)?
RE: [flexcoders] Custom List ItemRenderer / Recycling troubles (height incorrect)
Sorry, no magic sauce here. I had some pixie dust somewhere, but. Was it
Asimov or Clark that said, Any sufficiently advanced technology is
indistinguishable from magic?
When I needed a variable height renderer, I copied ListItemRenderer and
modified to my needs. That was the only way I could get it to work. It is
also *much* more performant than a container based renderer. The magic is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works well with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling troubles (height
incorrect)
I'm attempting to create a very simple item renderer for mx:List. I've found
that when the dataProvider is static, there are no problems with the custom
item
renderer. However, when the dataProvider is dynamic, the height of the item
renderer is not correct (and scroll bars appear for each renderer with any
meaningful # of rows). I've set variableRowHeight=true for the List. I've
also tried overriding the measure function and invaliding the size when a
dataChange event is dispatched (based on information provided on FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe. http://www.adobe.com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable to glean
the
magic sauce that makes the item renderer function correctly when the control
recycles. Can someone explain / provide a functional example(s) with mx:Text
(ActionScript and MXML examples preferred, for completeness)?
[flexcoders] Re: Need Suggestions for Reporting In Flex Applications.
Thanks Dean, I have no idea about the dot matrix printers. But generally I do all my reporting using PHP. At the end of the day flex is in a browser and you are going to be limited by that. I'm sure PHP can produce a format that would work well for a dot matrix printer. If not, you could always have a TCP server written in any language to allow Flex to send data to it for reporting. This would be done using socket code in Flex. This also requires the server to accept a request for a security policy on a specific port. I will look for details on that. Well, I was bit worried about Flex's capacity to produce reports I dont mind about PHP producing reports in text format if it can write text file on server which can be fetched to client via FTP or if PHP can produce PDFs that can serve purpose of Windows graphis mode printing. The data exports to xls, dbf, ods etc. etc. still remain. I dont know what to do about. For sec of discussion how about using Birt on server to produce reports? have u given any thought to this ? But again we have to have Java at server. Can PHP send data to any program on server to produce reports then we can use delphi exe to run in wine and listen to TCP port on Linux Server and if its windows server then it can run natively. I dont know what reporting strategies are followed by ppl developing web applications. I dont have any experience in web development but there must be some way to produce reports, Since all over the world big web database applications are already running. BTW how u are doing reports I will follow your suit till we find some generous way for elegant reporting in flex. Thanks once again and best regards Raja
[flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Hi,
Set the List's variableRowHeight=true and use something like this in
the itemRenderer:
override protected function measure():void
{
var textLineMetrics:TextLineMetrics = comment.measureText(
comment.text );
// should add paddingTop, paddingBottom and verticalGap to this too
measuredHeight = textLineMetrics.height + myLinkButton.height;
}
-TH
--- In flexcoders@yahoogroups.com, Tracy Spratt tr...@... wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere, but. Was
it
Asimov or Clark that said, Any sufficiently advanced technology is
indistinguishable from magic?
When I needed a variable height renderer, I copied ListItemRenderer
and
modified to my needs. That was the only way I could get it to work. It
is
also *much* more performant than a container based renderer. The magic
is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works well
with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com]
On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling troubles
(height
incorrect)
I'm attempting to create a very simple item renderer for mx:List. I've
found
that when the dataProvider is static, there are no problems with the
custom
item
renderer. However, when the dataProvider is dynamic, the height of the
item
renderer is not correct (and scroll bars appear for each renderer with
any
meaningful # of rows). I've set variableRowHeight=true for the List.
I've
also tried overriding the measure function and invaliding the size
when a
dataChange event is dispatched (based on information provided on
FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe. http://www.adobe.com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer
width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable to
glean
the
magic sauce that makes the item renderer function correctly when the
control
recycles. Can someone explain / provide a functional example(s) with
mx:Text
(ActionScript and MXML examples preferred, for completeness)?
[flexcoders] Date data type in DataGrid
Dear Friends, In a data grid, how to identify that a field is of type DATE?. I am assigning datagrid.COLUMNS to combo box data providers (for search). For date field I have a separate search method. To call this I need to identify the DATA TYPE of column. Thanks in Advance. Regards, Srini.
[flexcoders] how to convert Html pages or text(html text) into a pdf document.
Hi Friends, can anybody suggest me how to convert Html pages or text(html text) into a pdf document on the fly . I have already used AlivePdf but did not got the desired results. please reply soon if any ideas. Thanks in Advance. Hasain
[flexcoders] Alternatives to ILOG Elixir (Diary and Resource Planner) components
Hi there - does anyone know of any good alternatives to two of the ILOG Elixir components, specifically the Calendar component and the resource chart (URLs below). My company only needs these two pieces of functionality for the application but the cost I've been quoted for ILOG is over £10k. http://visudemos.ilog.com/webdemos/humanresources/humanresources.html http://visudemos.ilog.com/webdemos/calendar/calendar.html thanks in advance for any advice. Richard.
Re: [flexcoders] Need Suggestions for database application.
Hi Raja, I have been searching around for a while on different setups for flex and have recently been using the following: A Flex UI with symfony framework on php5.2.8 on MySQL database. Although I have only been trying out the symfony framework for a while it appears very powerful and would meet your criteria of using multiple database vendors. There are also some great tutorials on their site www.symfony-project.org Regards, Lee riaCoding Raja S Patil wrote: 1 The application should be independent of Backend database. i.e. it should be able to use any of Oracle, MS-SQL, MySQL, PostgreSQL, Firebird as backend. 2 The business logic should move from Stored procedures to some middle layer i.e. to Application server. 3 It should be possible to separate application server and database server i.e. application server and Database servers can be at different physical locations or they can reside on same server. 4 the communication between database server-application server and application Server-Client should be secured one or may be encrypted so that man in middle is not able to modify the data . Thanks for reading this long post and best regards raja -- View this message in context: http://www.nabble.com/Need-Suggestions-for-database-application.-tp23071392p23100077.html Sent from the FlexCoders mailing list archive at Nabble.com.
Re: [flexcoders] Need Help
Hi Heman I not sure if you are already generating the CSV file from the datagrid? if not this should help http://www.abdulqabiz.com/blog/archives/flash_and_actionscript/datagriddataexporter.php regards Lee riaCoding heman babu wrote: i need the excel file generated from the datagrid to be attached as an attachment in the email?.Please suggest me some good ideas and examples. RegardsHeman -- View this message in context: http://www.nabble.com/Need-Help-tp23097399p23100598.html Sent from the FlexCoders mailing list archive at Nabble.com.
[flexcoders] Re: create a thumbnail dynamically from large image using flex
I knew I had a class I wrote to do this...
If you have the large image, get its bitmapData, feed it to this function with
target's dimensions, and boom...you'll get the resized 'thumbnail' as Bitmap.
You can also change the return type and return the bitmapData newBmd (sorry
about the formatting)
public function scaleBitmapData(_bmd:BitmapData, targetContainerWidth:Number,
targetContainerHeight:Number):Bitmap {
//set matrix sx sy
var sx:Number = targetContainerWidth / _bmd.width;
var sy:Number = targetContainerHeight / _bmd.height;
//instantiate new matrix, and set scaling
var m:Matrix = new Matrix();
m.scale(sx, sy);
//create new bitmapdata
var newBmd:BitmapData = new BitmapData(targetContainerWidth,
targetContainerHeight);
//draw new bitmapdata with matrix
newBmd.draw(_bmd, m);
//create final bitmap with new bitmapdata
var newBmp:Bitmap = new Bitmap(newBmd);
//set smooting to true
newBmp.smoothing = true;
//boom!
return newBmp;
}
--- In flexcoders@yahoogroups.com, stinasius stinas...@... wrote:
i just need a way to create a thumbnail from a larger image dynamically in
flex so that i dont have to store both a thumb and large image of the same
image. trying to save on storage and load time of application. can some one
please help out. thanks
[flexcoders] Re: create a thumbnail dynamically from large image using flex
hi, please share the whole class please.
[flexcoders] Reoading a view from a viewstack
My application uses a ToggleButtonBar with a viewstack as it's dataprovider. When the app is first loaded and each component is called in the stack, it loads the component and runs it's initApp() on the creationComplete. However when you go back it's already loaded and doesn't run the initApp() and pull new external data. Is there a way to automatically reload the component each time a generated button is pushed in the ToggleButtonBar?
[flexcoders] Re: create a thumbnail dynamically from large image using flex
He shared all you need. Just pass in bitmap data of your image which I believe is the source attribute. var newImg:Image = new Image(); newImg.source = scaleBitmapData(originalImage.source,width,height); --- In flexcoders@yahoogroups.com, stinasius stinas...@... wrote: hi, please share the whole class please.
[flexcoders] Re: create a thumbnail dynamically from large image using flex
Here's another method that would allow you to pass in the whole UIComponent.
Below is an example usage:
public function getUIComponentBitmapData( target:UIComponent, w:Number,
h:Number ) : BitmapData
{
// scale down (or up)
var scaleX:Number = w / target.width;
var scaleY:Number = h / target.height;
var m:Matrix = new Matrix();
m.scale(scaleX, scaleY);
// get new bitmap data
var bd:BitmapData = new BitmapData( w, h );
bd.draw( target, m );
bd.smoothing = true;
// return the new bitmap data
return bd;
}
Assume you have var originalImage:Image already set and you want to scale it
down to 50x30:
var newImage:Image = new Image();
newImage.source = getUIComponentBitmapData( originalImage, 50, 30 );
--- In flexcoders@yahoogroups.com, stinasius stinas...@... wrote:
hi, please share the whole class please.
[flexcoders] Tradeoffs
What are the tradeoffs between creating a flex project with the J2EE type vs None type? The J2EE type is about 10% larger from what I can tell, but the None type seems to work just fine in the browser. If we start with None type, and then add ActionScript calls to the Remote interface it seems to work just fine, but I wonder about performance. -- View this message in context: http://www.nabble.com/Tradeoffs-tp23114437p23114437.html Sent from the FlexCoders mailing list archive at Nabble.com.
[flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Tracy, I have to agree. I was able to get a fully functional item renderer
based on ListItemRenderer. However, in theory, one should be able to do it in
MXML. With that in mind, I replaced the UITextField with mx:Text. It's
probably not surprising to many that the renderer does not behave as expected
anymore. The height issue appears to be tied to the component in some fashion.
I'd file a defect but I haven't seen much ROI in such reports.
--- In flexcoders@yahoogroups.com, Tracy Spratt tr...@... wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere, but. Was it
Asimov or Clark that said, Any sufficiently advanced technology is
indistinguishable from magic?
When I needed a variable height renderer, I copied ListItemRenderer and
modified to my needs. That was the only way I could get it to work. It is
also *much* more performant than a container based renderer. The magic is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works well with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling troubles (height
incorrect)
I'm attempting to create a very simple item renderer for mx:List. I've found
that when the dataProvider is static, there are no problems with the custom
item
renderer. However, when the dataProvider is dynamic, the height of the item
renderer is not correct (and scroll bars appear for each renderer with any
meaningful # of rows). I've set variableRowHeight=true for the List. I've
also tried overriding the measure function and invaliding the size when a
dataChange event is dispatched (based on information provided on FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe. http://www.adobe.com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable to glean
the
magic sauce that makes the item renderer function correctly when the control
recycles. Can someone explain / provide a functional example(s) with mx:Text
(ActionScript and MXML examples preferred, for completeness)?
[flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Tim, I have been using the variableRowHeight (see my original example). Also,
one should not need to replicate the measure of mx:Text. Your example
disregards internal padding elements of the Text component. I did try
setActualSize combined with getExplicitOrMeasuredHeight, but that only works in
ActionScript. I encourage you to try and create a functional example. I'm
fairly confident at this point that you will not get one working in MXML with
mx:Text (multi-line).
I was able to get a fully functional item renderer based on ListItemRenderer,
which uses UITextField. However, in theory, one should be able to do it in
MXML. With that in mind, I replaced the UITextField of my ActionScript-based
renderer with mx:Text. It's probably not surprising to many that the renderer
no longer behaves as expected. The height issue appears to be tied to the
component in some fashion (mx:Text in this case). I'd file a defect but I
haven't seen much ROI in such reports.
--- In flexcoders@yahoogroups.com, Tim Hoff timh...@... wrote:
Hi,
Set the List's variableRowHeight=true and use something like this in
the itemRenderer:
override protected function measure():void
{
var textLineMetrics:TextLineMetrics = comment.measureText(
comment.text );
// should add paddingTop, paddingBottom and verticalGap to this too
measuredHeight = textLineMetrics.height + myLinkButton.height;
}
-TH
--- In flexcoders@yahoogroups.com, Tracy Spratt tracy@ wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere, but. Was
it
Asimov or Clark that said, Any sufficiently advanced technology is
indistinguishable from magic?
When I needed a variable height renderer, I copied ListItemRenderer
and
modified to my needs. That was the only way I could get it to work. It
is
also *much* more performant than a container based renderer. The magic
is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works well
with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com]
On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling troubles
(height
incorrect)
I'm attempting to create a very simple item renderer for mx:List. I've
found
that when the dataProvider is static, there are no problems with the
custom
item
renderer. However, when the dataProvider is dynamic, the height of the
item
renderer is not correct (and scroll bars appear for each renderer with
any
meaningful # of rows). I've set variableRowHeight=true for the List.
I've
also tried overriding the measure function and invaliding the size
when a
dataChange event is dispatched (based on information provided on
FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe. http://www.adobe.com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer
width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable to
glean
the
magic sauce that makes the item renderer function correctly when the
control
recycles. Can someone explain / provide a functional example(s) with
mx:Text
(ActionScript and MXML examples preferred, for completeness)?
[flexcoders] Re: Need Suggestions for database application.
Thanks Lee, I have been searching around for a while on different setups for flex and have recently been using the following: A Flex UI with symfony framework on php5.2.8 on MySQL database. Although I have only been trying out the symfony framework for a while it appears very powerful and would meet your criteria of using multiple database vendors. There are also some great tutorials on their site www.symfony-project.org Well one more avenue, I will consider this too. Just for sec of information can u just briefly mention how u are using it wrt Flex application and how database abstraction is achieved in Symphony ? To best of my knowledge only persistence is to be handled by PHP server and in a very fast browse of website i could not locate any information about handling persistence. I feel that Flex application will need data to/fro from server either in XML format or in form of data objects rest of the things will be taken care by Serverside framework. Off course performance also a factor to be considered. Have u tested it on multiple dbms ? Thanks Once again and best regards. Raja
[flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Hi,
Yes, after playing with it a little, you're correct; my suggestion only
works in AS. Sorry, I always extend UIComponent for itemRenderers that
need to have a variableRowHeight.
BTW, in the future, please sign your posts; so that we can put a name to
your warm and positive comments.
-TH
--- In flexcoders@yahoogroups.com, wubac1 wub...@... wrote:
Tim, I have been using the variableRowHeight (see my original
example). Also, one should not need to replicate the measure of mx:Text.
Your example disregards internal padding elements of the Text component.
I did try setActualSize combined with getExplicitOrMeasuredHeight, but
that only works in ActionScript. I encourage you to try and create a
functional example. I'm fairly confident at this point that you will not
get one working in MXML with mx:Text (multi-line).
I was able to get a fully functional item renderer based on
ListItemRenderer, which uses UITextField. However, in theory, one should
be able to do it in MXML. With that in mind, I replaced the UITextField
of my ActionScript-based renderer with mx:Text. It's probably not
surprising to many that the renderer no longer behaves as expected. The
height issue appears to be tied to the component in some fashion
(mx:Text in this case). I'd file a defect but I haven't seen much ROI in
such reports.
--- In flexcoders@yahoogroups.com, Tim Hoff TimHoff@ wrote:
Hi,
Set the List's variableRowHeight=true and use something like this
in
the itemRenderer:
override protected function measure():void
{
var textLineMetrics:TextLineMetrics = comment.measureText(
comment.text );
// should add paddingTop, paddingBottom and verticalGap to this too
measuredHeight = textLineMetrics.height + myLinkButton.height;
}
-TH
--- In flexcoders@yahoogroups.com, Tracy Spratt tracy@ wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere, but.
Was
it
Asimov or Clark that said, Any sufficiently advanced technology
is
indistinguishable from magic?
When I needed a variable height renderer, I copied
ListItemRenderer
and
modified to my needs. That was the only way I could get it to
work. It
is
also *much* more performant than a container based renderer. The
magic
is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works well
with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com
[mailto:flexcod...@yahoogroups.com]
On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling
troubles
(height
incorrect)
I'm attempting to create a very simple item renderer for mx:List.
I've
found
that when the dataProvider is static, there are no problems with
the
custom
item
renderer. However, when the dataProvider is dynamic, the height of
the
item
renderer is not correct (and scroll bars appear for each renderer
with
any
meaningful # of rows). I've set variableRowHeight=true for the
List.
I've
also tried overriding the measure function and invaliding the size
when a
dataChange event is dispatched (based on information provided on
FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe.
http://www.adobe.com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer
width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable
to
glean
the
magic sauce that makes the item renderer function correctly when
the
control
recycles. Can someone explain / provide a functional example(s)
with
mx:Text
(ActionScript and MXML examples preferred, for completeness)?
RE: [flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Hah, Tim, your spell didn't quite do it, huh? ;) Container-based renderers
are problematic. For anything even slightly complex, extend UIComponent.
I copy ListItemRenderer, it is a great starting point. It is pretty easy to
see where to add your special incantations.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of Tim Hoff
Sent: Saturday, April 18, 2009 5:27 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Custom List ItemRenderer / Recycling troubles
(height incorrect)
Hi,
Yes, after playing with it a little, you're correct; my suggestion only
works in AS. Sorry, I always extend UIComponent for itemRenderers that
need to have a variableRowHeight.
BTW, in the future, please sign your posts; so that we can put a name to
your warm and positive comments.
-TH
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com ups.com,
wubac1 wub...@... wrote:
Tim, I have been using the variableRowHeight (see my original
example). Also, one should not need to replicate the measure of mx:Text.
Your example disregards internal padding elements of the Text component.
I did try setActualSize combined with getExplicitOrMeasuredHeight, but
that only works in ActionScript. I encourage you to try and create a
functional example. I'm fairly confident at this point that you will not
get one working in MXML with mx:Text (multi-line).
I was able to get a fully functional item renderer based on
ListItemRenderer, which uses UITextField. However, in theory, one should
be able to do it in MXML. With that in mind, I replaced the UITextField
of my ActionScript-based renderer with mx:Text. It's probably not
surprising to many that the renderer no longer behaves as expected. The
height issue appears to be tied to the component in some fashion
(mx:Text in this case). I'd file a defect but I haven't seen much ROI in
such reports.
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com ups.com,
Tim Hoff TimHoff@ wrote:
Hi,
Set the List's variableRowHeight=true and use something like this
in
the itemRenderer:
override protected function measure():void
{
var textLineMetrics:TextLineMetrics = comment.measureText(
comment.text );
// should add paddingTop, paddingBottom and verticalGap to this too
measuredHeight = textLineMetrics.height + myLinkButton.height;
}
-TH
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com, Tracy Spratt tracy@ wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere, but.
Was
it
Asimov or Clark that said, Any sufficiently advanced technology
is
indistinguishable from magic?
When I needed a variable height renderer, I copied
ListItemRenderer
and
modified to my needs. That was the only way I could get it to
work. It
is
also *much* more performant than a container based renderer. The
magic
is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works well
with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com
[mailto:flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com ups.com]
On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com ups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling
troubles
(height
incorrect)
I'm attempting to create a very simple item renderer for mx:List.
I've
found
that when the dataProvider is static, there are no problems with
the
custom
item
renderer. However, when the dataProvider is dynamic, the height of
the
item
renderer is not correct (and scroll bars appear for each renderer
with
any
meaningful # of rows). I've set variableRowHeight=true for the
List.
I've
also tried overriding the measure function and invaliding the size
when a
dataChange event is dispatched (based on information provided on
FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe.
http://www.adobe. http://www.adobe.com/2006/mxml com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
The mx:List definition:
mx:List id=comments itemRenderer=com.test.CommentRenderer
width=100%
height=100%/
I've looked over the ListItemRenderer, but have so far been unable
to
glean
the
magic sauce that makes the
RE: [flexcoders] Reoading a view from a viewstack
No, a rendered component is rendered and there is no way to 'reload it. I suppose you could use a Module or SWFLoader, but that is a heavy-duty architectural change. Duplicate the init functionality you need in a show event handler. Tracy Spratt, Lariat Services, development services available _ From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Wally Kolcz Sent: Saturday, April 18, 2009 11:03 AM To: Flexcoders@yahoogroups.com Subject: [flexcoders] Reoading a view from a viewstack My application uses a ToggleButtonBar with a viewstack as it's dataprovider. When the app is first loaded and each component is called in the stack, it loads the component and runs it's initApp() on the creationComplete. However when you go back it's already loaded and doesn't run the initApp() and pull new external data. Is there a way to automatically reload the component each time a generated button is pushed in the ToggleButtonBar?
[flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Yep, no magic here. :)
-TH
--- In flexcoders@yahoogroups.com, Tracy Spratt tr...@... wrote:
Hah, Tim, your spell didn't quite do it, huh? ;) Container-based
renderers
are problematic. For anything even slightly complex, extend
UIComponent.
I copy ListItemRenderer, it is a great starting point. It is pretty
easy to
see where to add your special incantations.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com]
On
Behalf Of Tim Hoff
Sent: Saturday, April 18, 2009 5:27 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Custom List ItemRenderer / Recycling
troubles
(height incorrect)
Hi,
Yes, after playing with it a little, you're correct; my suggestion
only
works in AS. Sorry, I always extend UIComponent for itemRenderers that
need to have a variableRowHeight.
BTW, in the future, please sign your posts; so that we can put a name
to
your warm and positive comments.
-TH
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com,
wubac1 wubac1@ wrote:
Tim, I have been using the variableRowHeight (see my original
example). Also, one should not need to replicate the measure of
mx:Text.
Your example disregards internal padding elements of the Text
component.
I did try setActualSize combined with getExplicitOrMeasuredHeight, but
that only works in ActionScript. I encourage you to try and create a
functional example. I'm fairly confident at this point that you will
not
get one working in MXML with mx:Text (multi-line).
I was able to get a fully functional item renderer based on
ListItemRenderer, which uses UITextField. However, in theory, one
should
be able to do it in MXML. With that in mind, I replaced the
UITextField
of my ActionScript-based renderer with mx:Text. It's probably not
surprising to many that the renderer no longer behaves as expected.
The
height issue appears to be tied to the component in some fashion
(mx:Text in this case). I'd file a defect but I haven't seen much ROI
in
such reports.
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com,
Tim Hoff TimHoff@ wrote:
Hi,
Set the List's variableRowHeight=true and use something like
this
in
the itemRenderer:
override protected function measure():void
{
var textLineMetrics:TextLineMetrics = comment.measureText(
comment.text );
// should add paddingTop, paddingBottom and verticalGap to this
too
measuredHeight = textLineMetrics.height + myLinkButton.height;
}
-TH
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com, Tracy Spratt tracy@ wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere,
but.
Was
it
Asimov or Clark that said, Any sufficiently advanced technology
is
indistinguishable from magic?
When I needed a variable height renderer, I copied
ListItemRenderer
and
modified to my needs. That was the only way I could get it to
work. It
is
also *much* more performant than a container based renderer. The
magic
is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works
well
with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com
[mailto:flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com]
On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling
troubles
(height
incorrect)
I'm attempting to create a very simple item renderer for
mx:List.
I've
found
that when the dataProvider is static, there are no problems with
the
custom
item
renderer. However, when the dataProvider is dynamic, the height
of
the
item
renderer is not correct (and scroll bars appear for each
renderer
with
any
meaningful # of rows). I've set variableRowHeight=true for the
List.
I've
also tried overriding the measure function and invaliding the
size
when a
dataChange event is dispatched (based on information provided on
FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe.
http://www.adobe. http://www.adobe.com/2006/mxml com/2006/mxml
com/2006/mxml width=100%
mx:Script
![CDATA[
override protected function measure():void
{
super.measure();
measuredHeight = comment.textHeight;
}
]]
/mx:Script
mx:LinkButton label={data.commenter.name}/
mx:Text id=comment width=100% text={data.comment}
dataChange=invalidateSize()/
/mx:VBox
[flexcoders] Re: Custom List ItemRenderer / Recycling troubles (height incorrect)
Well, there is magic in ActionScript. MXML doesn't have the item renderer mojo.
-W
--- In flexcoders@yahoogroups.com, Tim Hoff timh...@... wrote:
Yep, no magic here. :)
-TH
--- In flexcoders@yahoogroups.com, Tracy Spratt tracy@ wrote:
Hah, Tim, your spell didn't quite do it, huh? ;) Container-based
renderers
are problematic. For anything even slightly complex, extend
UIComponent.
I copy ListItemRenderer, it is a great starting point. It is pretty
easy to
see where to add your special incantations.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com]
On
Behalf Of Tim Hoff
Sent: Saturday, April 18, 2009 5:27 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Custom List ItemRenderer / Recycling
troubles
(height incorrect)
Hi,
Yes, after playing with it a little, you're correct; my suggestion
only
works in AS. Sorry, I always extend UIComponent for itemRenderers that
need to have a variableRowHeight.
BTW, in the future, please sign your posts; so that we can put a name
to
your warm and positive comments.
-TH
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com,
wubac1 wubac1@ wrote:
Tim, I have been using the variableRowHeight (see my original
example). Also, one should not need to replicate the measure of
mx:Text.
Your example disregards internal padding elements of the Text
component.
I did try setActualSize combined with getExplicitOrMeasuredHeight, but
that only works in ActionScript. I encourage you to try and create a
functional example. I'm fairly confident at this point that you will
not
get one working in MXML with mx:Text (multi-line).
I was able to get a fully functional item renderer based on
ListItemRenderer, which uses UITextField. However, in theory, one
should
be able to do it in MXML. With that in mind, I replaced the
UITextField
of my ActionScript-based renderer with mx:Text. It's probably not
surprising to many that the renderer no longer behaves as expected.
The
height issue appears to be tied to the component in some fashion
(mx:Text in this case). I'd file a defect but I haven't seen much ROI
in
such reports.
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com,
Tim Hoff TimHoff@ wrote:
Hi,
Set the List's variableRowHeight=true and use something like
this
in
the itemRenderer:
override protected function measure():void
{
var textLineMetrics:TextLineMetrics = comment.measureText(
comment.text );
// should add paddingTop, paddingBottom and verticalGap to this
too
measuredHeight = textLineMetrics.height + myLinkButton.height;
}
-TH
--- In flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com, Tracy Spratt tracy@ wrote:
Sorry, no magic sauce here. I had some pixie dust somewhere,
but.
Was
it
Asimov or Clark that said, Any sufficiently advanced technology
is
indistinguishable from magic?
When I needed a variable height renderer, I copied
ListItemRenderer
and
modified to my needs. That was the only way I could get it to
work. It
is
also *much* more performant than a container based renderer. The
magic
is
indeed in the measure() function.
If you do not have a lot of items to renderer, Repeater works
well
with
variable heights.
Tracy Spratt,
Lariat Services, development services available
_
From: flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com
[mailto:flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com]
On
Behalf Of wubac1
Sent: Saturday, April 18, 2009 2:02 AM
To: flexcod...@yahoogro mailto:flexcoders%40yahoogroups.com
ups.com
Subject: [flexcoders] Custom List ItemRenderer / Recycling
troubles
(height
incorrect)
I'm attempting to create a very simple item renderer for
mx:List.
I've
found
that when the dataProvider is static, there are no problems with
the
custom
item
renderer. However, when the dataProvider is dynamic, the height
of
the
item
renderer is not correct (and scroll bars appear for each
renderer
with
any
meaningful # of rows). I've set variableRowHeight=true for the
List.
I've
also tried overriding the measure function and invaliding the
size
when a
dataChange event is dispatched (based on information provided on
FlexCoders
in previous discussions along these lines).
CommentRenderer.mxml:
?xml version=1.0 encoding=utf-8?
mx:VBox xmlns:mx=http://www.adobe.
http://www.adobe. http://www.adobe.com/2006/mxml com/2006/mxml
[flexcoders] Lightweight framework
Go there, I know there have been a billion topics regarding frameworks on here. I have been using cairngorm for a while and do like it. Now after doing a few projects, I have come to the realization that pretty much all projects I do are small - med with remoting. Cairngorm when looking back at it, seems like overkill with a lot of code (for projects my size- just hobby and personal projects). I like the code structure of frameworks and the advantages they offer, but I just want to simplify a bit. But I am curious if anyone can recommend a light weight framework? D
[flexcoders] Re: Lightweight framework
Flex is a lightweight framework. Do you need more then what Flex provides in interface, events, and modules? --- In flexcoders@yahoogroups.com, Dnk d.k.emailli...@... wrote: Go there, I know there have been a billion topics regarding frameworks on here. I have been using cairngorm for a while and do like it. Now after doing a few projects, I have come to the realization that pretty much all projects I do are small - med with remoting. Cairngorm when looking back at it, seems like overkill with a lot of code (for projects my size- just hobby and personal projects). I like the code structure of frameworks and the advantages they offer, but I just want to simplify a bit. But I am curious if anyone can recommend a light weight framework? D
