Participating Frequently

Question

When is M3? I need fractional scroll positions badly...

Forum|Forum|18 years ago
March 24, 2008
11 replies
1151 views

When is M3? I need fractional scroll positions on the List control badly... Is there beta/dev code or a third-party subclass with this functionality?

The only thing I could find was the following, but when is the deadline for M3? I really, really need fractional scrolling AND the advanced functionality of List. (I also need variable row height).
http://opensource.adobe.com/wiki/display/flexsdk/Flex+3

List and Data Effects

Planned milestone: M3

Enhance the usability and visual appeal of some of the List-based components (List, TileList, DataGrid) by adding more animation support.

* Smooth scrolling with fractional scroll positions
* Effects that occur when data changes

I also found this thread, but no good information.
http://www.mail-archive.com/flexcoders@yahoogroups.com/msg67093.html

Developers

This topic has been closed for replies.

_Alex_Harui_

Participating Frequently

<div class=Section1> 10.0pt;font-family:Arial;color:navy'>Please file a bug with a simple test case.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'>face="Times New Roman"> <hr size=2 width="100%" align=center tabindex=-1> </div> font-family:Tahoma;font-weight:bold'>From:face=Tahoma> siva2cu [mailto:member@adobeforums.com] Sent: Saturday, August 23, 2008 10:14 PM To: <st1:PersonName w:st="on">flexsdk-dev@adobeforums.com</st1:PersonName> Subject: Re: When is M3? I need fractional scroll positions badly...<o:p></o:p> </div> 12.0pt'><o:p> </o:p> face="Times New Roman">A new message was posted by siva2cu in Developers -- When is M3? I need fractional scroll positions badly... In datagrid, i rendered combobox in columns till i got vertical scroll in datagrid. but the problem is wherever i select combobox in datagrid subsequently, datagrid is autoscrolling. please look at this problem and kindly give me solution. Thanks, Sivakumar.S <o:p></o:p> <div class=MsoNormal><span style='font-size:12.0pt'> <hr size=2 width=200 style='width:150.0pt' align=left> </div> face="Times New Roman">View/reply at <a href="http://www.adobeforums.com/webx?13@@.59b4c611/9">When is M3? I need fractional scroll positions badly...</a> Replies by email are OK. Use the <a href="http://www.adobeforums.com/webx?280@@.59b4c611!folder=.3c060fa3">unsubscribe</a> form to cancel your email subscription.<o:p></o:p> </div>

_siva2cu_

Participant

In datagrid, i rendered combobox in columns till i got vertical scroll in datagrid. but the problem is wherever i select combobox in datagrid subsequently, datagrid is autoscrolling. please look at this problem and kindly give me solution.

Thanks,
Sivakumar.S

_Alex_Harui_

Participating Frequently

<div class=Section1> 10.0pt;font-family:Arial;color:navy'>It is best if you do so. No hurry, it won’t get fixed for a while anyway.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'>face="Times New Roman"> <hr size=2 width="100%" align=center tabindex=-1> </div> font-family:Tahoma;font-weight:bold'>From:face=Tahoma> Nathanael Jones [mailto:member@adobeforums.com] Sent: Friday, March 28, 2008 8:57 AM To: flexsdk-dev@adobeforums.com Subject: Re: When is M3? I need fractional scroll positions badly...<o:p></o:p> </div> 12.0pt'><o:p> </o:p> face="Times New Roman">A new message was posted by Nathanael Jones in Developers -- When is M3? I need fractional scroll positions badly... Could you file the bug report? I'll see what I can do with getMeasuringRenderer Monday. This has been a hectic week! <o:p></o:p> <div class=MsoNormal><span style='font-size:12.0pt'> <hr size=2 width=200 style='width:150.0pt' align=left> </div> face="Times New Roman">View/reply at <a href="http://www.adobeforums.com/webx?13@@.59b4c611/7">When is M3? I need fractional scroll positions badly...</a> Replies by email are OK. Use the <a href="http://www.adobeforums.com/webx?280@@.59b4c611!folder=.3c060fa3">unsubscribe</a> form to cancel your email subscription.<o:p></o:p> </div>

_Nathanael_Jones_Author

Participating Frequently

Could you file the bug report? I'll see what I can do with getMeasuringRenderer Monday. This has been a hectic week!

_Alex_Harui_

Participating Frequently

<div class=Section1> 10.0pt;font-family:Arial;color:navy'>Yuck. Looks like List pads left and right when making rows, but not when measuring. Please file a bug.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> 10.0pt;font-family:Arial;color:navy'>You might be able to swap in a different measuringRenderer by overriding mx_internal getMeasuringRenderer.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'>face="Times New Roman"> <hr size=2 width="100%" align=center tabindex=-1> </div> font-family:Tahoma;font-weight:bold'>From:face=Tahoma> Nathanael Jones [mailto:member@adobeforums.com] Sent: Tuesday, March 25, 2008 3:10 PM To: flexsdk-dev@adobeforums.com Subject: Re: When is M3? I need fractional scroll positions badly...<o:p></o:p> </div> 12.0pt'><o:p> </o:p> face="Times New Roman">A new message was posted by Nathanael Jones in Developers -- When is M3? I need fractional scroll positions badly... I'm using a copy of ListItemRenderer - If the IUTextField has ignorePadding=false, then padding is applied twice. If true, then padding is only applied once. Somehow List is applying the padding also? I'm not seeing what you describe - ListItemRenderer has ignorePadding=true and has no padding logic built in. <o:p></o:p> <div class=MsoNormal><span style='font-size:12.0pt'> <hr size=2 width=200 style='width:150.0pt' align=left> </div> face="Times New Roman">View/reply at <a href="http://www.adobeforums.com/webx?13@@.59b4c611/5">When is M3? I need fractional scroll positions badly...</a> Replies by email are OK. Use the <a href="http://www.adobeforums.com/webx?280@@.59b4c611!folder=.3c060fa3">unsubscribe</a> form to cancel your email subscription.<o:p></o:p> </div>

_Nathanael_Jones_Author

Participating Frequently

I'm using a copy of ListItemRenderer - If the IUTextField has ignorePadding=false, then padding is applied twice. If true, then padding is only applied once. Somehow List is applying the padding also? I'm not seeing what you describe - ListItemRenderer has ignorePadding=true and has no padding logic built in.

_Alex_Harui_

Participating Frequently

<div class=Section1> 10.0pt;font-family:Arial;color:navy'>For performance reasons, the List handles paddingTop/Bottom, and the renderer handles paddingLeft/Right. If you factor paddingLeft/Right into the renderer’s measuredWidth, it should work out.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> 10.0pt;font-family:Arial;color:navy'>It may also be true that you’re running into the wordwrapping issue where you have to fix the width of the text widgets based on the renderer’s layout and the renderer’s explicitWidth property (which is set by the List before calling measure() on the renderer).<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'>face="Times New Roman"> <hr size=2 width="100%" align=center tabindex=-1> </div> font-family:Tahoma;font-weight:bold'>From:face=Tahoma> Nathanael Jones [mailto:member@adobeforums.com] Sent: Tuesday, March 25, 2008 6:26 AM To: flexsdk-dev@adobeforums.com Subject: Re: When is M3? I need fractional scroll positions badly...<o:p></o:p> </div> 12.0pt'><o:p> </o:p> face="Times New Roman">A new message was posted by Nathanael Jones in Developers -- When is M3? I need fractional scroll positions badly... Thanks. I'm running into (I think) a bug in measureHeightOfItems - It doesn't seem to be factoring in paddingLeft and paddingRight, just using listContent.width. This throws the measure height off since the text in the measuring renderer wraps differently. Is there an easy fix, or will I need to re-implement measureHeightOfItems and its dependencies (since getMeasuringRenderer and setupRendererFromData are private)? <o:p></o:p> <div class=MsoNormal><span style='font-size:12.0pt'> <hr size=2 width=200 style='width:150.0pt' align=left> </div> face="Times New Roman">View/reply at <a href="http://www.adobeforums.com/webx?13@@.59b4c611/3">When is M3? I need fractional scroll positions badly...</a> Replies by email are OK. Use the <a href="http://www.adobeforums.com/webx?280@@.59b4c611!folder=.3c060fa3">unsubscribe</a> form to cancel your email subscription.<o:p></o:p> </div>

_Nathanael_Jones_Author

Participating Frequently

Thanks. I'm running into (I think) a bug in measureHeightOfItems - It doesn't seem to be factoring in paddingLeft and paddingRight, just using listContent.width. This throws the measure height off since the text in the measuring renderer wraps differently.

Is there an easy fix, or will I need to re-implement measureHeightOfItems and its dependencies (since getMeasuringRenderer and setupRendererFromData are private)?

_Alex_Harui_

Participating Frequently

<div class=Section1> 10.0pt;font-family:Arial;color:navy'>I would not reimplement scrollVertically.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> 10.0pt;font-family:Arial;color:navy'>What is going on is that there is always some row fixed at the top of listContent. ScrollVertically changes which row that is. The code I added shifts the position of listContent so that it is a fractional row offset. If you want scrolling to tween, I would probably let scrollVertically do its thing and then tween the position of listContent. You’ll see logic around our selection tweens that know a tween is in progress, cancel the tween and start a new one. You’ll need to do the same for when someone is pounding on the scrollbar arrows.<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> 10.0pt;font-family:Arial;color:navy'>-Alex<o:p></o:p> 10.0pt;font-family:Arial;color:navy'><o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'>face="Times New Roman"> <hr size=2 width="100%" align=center tabindex=-1> </div> font-family:Tahoma;font-weight:bold'>From:face=Tahoma> Nathanael Jones [mailto:member@adobeforums.com] Sent: Monday, March 24, 2008 11:52 AM To: flexsdk-dev@adobeforums.com Subject: Re: When is M3? I need fractional scroll positions badly...<o:p></o:p> </div> 12.0pt'><o:p> </o:p> face="Times New Roman">A new message was posted by Nathanael Jones in Developers -- When is M3? I need fractional scroll positions badly... Actually, I just finished reading your code :) - I found it 10 minutes ago. My situation requires variable row heights, but I think I can get by without full smooth scrolling support, as long as I can animate scrolling between two verticalScrollPosition values. Should I try re-implementing the scrollVertically function with tweens? ListBase and List are large classes, and I haven't spend the time to commit their code to memory and fully understand everything related to scrolling. Would that work? Are actual x/y coordinates write-only? Would tweening them asynchronously from scrollVertically be safe? <o:p></o:p> <div class=MsoNormal><span style='font-size:12.0pt'> <hr size=2 width=200 style='width:150.0pt' align=left> </div> face="Times New Roman">View/reply at <a href="http://www.adobeforums.com/webx?13@@.59b4c611/1">When is M3? I need fractional scroll positions badly...</a> Replies by email are OK. Use the <a href="http://www.adobeforums.com/webx?280@@.59b4c611!folder=.3c060fa3">unsubscribe</a> form to cancel your email subscription.<o:p></o:p> </div>

_Nathanael_Jones_Author

Participating Frequently

Actually, I just finished reading your code :) - I found it 10 minutes ago.

My situation requires variable row heights, but I think I can get by without full smooth scrolling support, as long as I can animate scrolling between two verticalScrollPosition values.

Should I try re-implementing the scrollVertically function with tweens?

ListBase and List are large classes, and I haven't spend the time to commit their code to memory and fully understand everything related to scrolling.

Would that work? Are actual x/y coordinates write-only? Would tweening them asynchronously from scrollVertically be safe?

Show more replies

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded