[qooxdoo-devel] QxBuild - Close the project?

Hi devs, I'd like to close (delete) the qxbuild project from the google-code. The reason is that I'm now unable to support it at this time (to release new versions together with qooxdoo, to fix possible bugs related to qxbuild, etc...). If there is anybody interested about supporting the project

Re: [qooxdoo-devel] qxbuild question

On 5 Jun 2010, at 21:23, Petr Kobalíček wrote: > The order of methods isn't important. Javascript object is something > like hash table with access O(1). I see. Though that slightly difference performance keep puzzling me. > And about second question ;) It's purely your choice. I'm using > qxloa

Re: [qooxdoo-devel] qxbuild question

Hi Bee, The order of methods isn't important. Javascript object is something like hash table with access O(1). And about second question ;) It's purely your choice. I'm using qxloader to load everything, but if you need some library to be included before qooxdoo or before qxloader is invoked then

Re: [qooxdoo-devel] qxbuild question

On 5 Jun 2010, at 18:06, Petr Kobalíček wrote: > qxscripts = [ > qxsettings["qx.path"] + "/script/qx-" + qxsettings["qx.mode"] + ".js" > ]; Another question (again)... :D If I want to include another (non-qooxdoo) js script file, say codepress or highcharts, where should I put them? Within qxsc

Re: [qooxdoo-devel] qxbuild question

On 5 Jun 2010, at 18:06, Petr Kobalíček wrote: > qxscripts = [ > qxsettings["qx.path"] + "/script/qx-" + qxsettings["qx.mode"] + ".js" > ]; > > qxloader.run({ > scripts: qxscripts, > > finish: function() { >// your code here... > } > }); That's neater. Thanks! :) Another question... I h

Re: [qooxdoo-devel] qxbuild question

Hi Bee, I have another improvement, it's some time I wrote qxloader so I forgot for correct syntax, you can rearrange your code to: qxscripts = [ qxsettings["qx.path"] + "/script/qx-" + qxsettings["qx.mode"] + ".js" ]; qxloader.run({ scripts: qxscripts, finish: function() { // your cod

Re: [qooxdoo-devel] qxbuild question

On 4 Jun 2010, at 14:26, Bee Jay wrote: > (function() { > appMain = function() { > qx.Class.define("custom.Application", > { > // <-- my custom code goes here ---> > }); > }; > // here is the qxloader script > qxloader.run({scripts: qxscripts}); > qxloader.finish

Re: [qooxdoo-devel] qxbuild question

On 3 Jun 2010, at 21:35, Petr Kobalíček wrote: > thanks for using QxBuild. You're welcome. It's very helpfull for one who don't want to bother with the build tool, you know. ;) > I think that it's possible to do what you need. First it's needed to > fix the syntax error : > qxscripts = [ > qxse

Re: [qooxdoo-devel] qxbuild question

Hi Bee, thanks for using QxBuild. I think that it's possible to do what you need. First it's needed to fix the syntax error : qxscripts = [ qxsettings["qx.path"] + "/script/qx-" + qxsettings["qx.mode"] + ".js" ]; then you have to attach an 'finish' event listener to the qxloader: qxloader.fin

[qooxdoo-devel] qxbuild question

Hi all, I'm about to write a dynamic qooxdoo JS code generator framework. Since qooxdoo need to compile the source, I use qxbuild then. But, qxbuild also need to read an external JS file (custom.js). What I need is to be able to generate JS code on the fly directly injected into the HTML file,

Re: [qooxdoo-devel] qxbuild status

On 28 Mei 2010, at 19:43, Petr Kobalíček wrote: > this question is also in my blog so I answered there. QxBuild v1.1 is > in google code download page. Yes, I've just downloaded the new qxBuild. Thank you, Petr. :) -Bee-

Re: [qooxdoo-devel] qxbuild status

Hi, this question is also in my blog so I answered there. QxBuild v1.1 is in google code download page. Thanks -- Best regards - Petr Kobalicek On Fri, May 28, 2010 at 1:46 PM, Jonathan Weiß wrote: > > Hello Bee, > > > you might want to contact Petr directly if he does

Re: [qooxdoo-devel] qxbuild status

Hello Bee, you might want to contact Petr directly if he does not read this mailing list any longer: http://qooxdoo.678.n2.nabble.com/qxbuild-complete-qooxdoo-build-td1078757.html Cheers Jonathan - Jonathan Weiß Framework Engineer http://mysterycity.de/blog Blog - http://www.linkedi

[qooxdoo-devel] qxbuild status

Hi all, Is qxBuild author in this list? I saw qxBuild is still using qoxdoo v.1.0.1. When can we expect the new version which support the latest qooxdoo? TIA. -Bee- -- ___ q

Re: [qooxdoo-devel] qxbuild and qxet packages

> 4 : use qxbuild : you will just have to include a big js file and you > are at very few minutes from your previous js tested in the > playground. You can enjoy qooxdoo power but ok, files are big. At that > time, it is not important, its not deployed on production, isn't it ? > > 5. after

Re: [qooxdoo-devel] qxbuild and qxet packages

On Fri, Sep 18, 2009 at 08:34, Jean-Baptiste BRIAUD -- Novlog < j-b.bri...@novlog.com> wrote: > 4 : use qxbuild : you will just have to include a big js file and you > are at very few minutes from your previous js tested in the > playground. You can enjoy qooxdoo power but ok, files are big. At th

Re: [qooxdoo-devel] qxbuild and qxet packages

This is now more than one year I'm using qooxdoo for our innovative software project in a start'up called Novlog. I'm very happy and satisfied with my choice, even one year after. Despite I really appreciate qooxdoo, I think something could/should be improved : community size. We are all using

Re: [qooxdoo-devel] qxbuild and qxet packages

Hi Petr, I find it great that you make your Qooxdoo projects available for others to use/share/improve/... I just don't understand why you don't put them at another place than the one provided by Qooxdoo ( .../contrib/). Having everything together would make it a lot easier for me as a simple u

[qooxdoo-devel] qxbuild and qxet packages

Hi qooxdoo list, I'd like to introduce 2 projects I created at google code I want to share with qooxdoo community. 1. QxBuild ( http://code.google.com/p/qxbuild/ ) QxBuild is all-in-one package that allows to use qooxdoo as other javascript libraries, just include it and go. After Jean said th

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

+1 I would prefer a better integration with qooxdoo, so qxbuild as a contrib would be the best IMHO too. This would make qxbuild an official and recognized contribution rather than an opaque side module. I would also feel better with that option for the maintenance. On Sep 14, 2009, at 14:28

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Petr! On Mon, 2009-09-14 at 08:55 +, Petr Kobalíček wrote: > Hi guys, > > I can setup project on google.code and provide SVN access to few > people here working and also contributing qxbuild. I personally thing > that Jean is right. It's chaos and qxbuild is also currently not > supported

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

done, I couldn't wait for responses:) http://code.google.com/p/qxbuild/ please let me know who wants svn and admin access. 2009/9/14 Petr Kobalíček : > Hi Tim, see next discussion, > > I think we should make SVN repo where we can contribute and fix all issues. > - Petr > > 2009/9/14 Tim Demann :

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Tim, see next discussion, I think we should make SVN repo where we can contribute and fix all issues. - Petr 2009/9/14 Tim Demann : > > Hi Petr, > > you are welcome. > > > Petr Kobalíček wrote: >> >> This all is related to "manual initialization" already in bugzilla. >> > > The problem still e

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi guys, I can setup project on google.code and provide SVN access to few people here working and also contributing qxbuild. I personally thing that Jean is right. It's chaos and qxbuild is also currently not supported by qooxdoo (there are at minimal two issues that's not fixed). In qooxdoo home

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

On Sep 14, 2009, at 08:53 , Tim Demann wrote: > [CUT] > You are right, I have got another version of the ScriptLoader. I > found it > under www.kobalicek.com/res/files/js/qxbuild.zip. Is this archive not > up-to-date? > That's exactly why I'd like to found the qxbuild somewhere on sourceforge

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Petr, you are welcome. Petr Kobalíček wrote: > > This all is related to "manual initialization" already in bugzilla. > The problem still exists. As a workaround I simply removed the application initialization code at the end of qx-build.js manually. Petr Kobalíček wrote: > > I don't

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Tim, thanks for your code, I will look at it and try to make it officially working, but I don't know if there is not problem also in Qooxdoo. Some time ago when I tried qxbuild there was problem that when qooxdoo detected page load (some kind of load event, unfortunately when only first script

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Petr, thanks for your response. In the meantime I fixed the IE problem by myself. The ScriptLoader can't cope with IE for two reasons: 1. The onload-event doesn't work for script tags in IE. So the progress bar doesn't show any progress and the application doesn't start. That means "loading p

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Tim, good news, I'm working now in web again (so it means also in qooxdoo) and I'm preparing new version of qxbuild. Bad news are that I know about this issue and it's needed to patch qooxdoo first. This enchancement is related to this issue: http://bugzilla.qooxdoo.org/show_bug.cgi?id=2116

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Petr, I used qxbuild for building 0.8.3 and it works fine for FF. But for IE I can't get it to work. I already excluded qx.bom.Vml to suppress the "Unspecific Error" message. Now, the ScriptLoader seems to load the scripts but the onLoad method won't be called and the loading process stucks

Re: [qooxdoo-devel] [qxbuild] fix.py error when running the build

Yes, it's a kind of UNIX : Mac OS. I'll try. BTW, what about this idea of a "dev host" for qxbuild ? Something like a SVN, one or two doc pages, ... Why not a qooxdoo contrib ? On 21 Mar 2009, at 01:17, Petr Kobalíček wrote: > Hi Jean, > > running on unix ? Maybe it should be "command": "./fix.p

Re: [qooxdoo-devel] [qxbuild] fix.py error when running the build

Hi Jean, running on unix ? Maybe it should be "command": "./fix.py", shouldn't it ? - Petr 2009/3/20 Jean-Baptiste BRIAUD -- Novlog : > Hi, > I have an error when running qxbuild : Executing shell command "fix.py"... > /bin/sh: fix.py: command not found > Traceback (most recent call last):

[qooxdoo-devel] [qxbuild] fix.py error when running the build

Hi, I have an error when running qxbuild : >>> Executing shell command "fix.py"... /bin/sh: fix.py: command not found Traceback (most recent call last): I manage to make ti work by changing the line refering to fix.py on config.json "qxbuild-fix" : { "shell": { "

[qooxdoo-devel] [qxbuild] extract js files to load

Hi, I'm not sure this kind of email is the best way to share this code. Petr, why not put that on qooxdoo contrib or sourceforge or whatever you prefer so we could have a versioning system ? I extracted the list if js files to load outside the main html file. I'm thinking to this section :

Re: [qooxdoo-devel] qxbuild and IE7

Hi Petr, this is supposed to work. can you open a bug report for this issue as well? Best Fabian > Hi devs, > > I have problem running qxbuild with IE7 (maybe IE6 too, not tested). I > think that this problem is related to qooxdoo and not qxbuild, because > qxbuild is de facto only qooxdoo with a

[qooxdoo-devel] qxbuild startup page : some improvement

Here is a new version that allow more flexibility to include your HTML stuff for a startup page. The bar is now all in % rather than px, so the variable w doesn't look like usefull anymore. It also print the loaded files / total number of file. BTW, the bar never goes to 100% I don't know why.

Re: [qooxdoo-devel] qxbuild startup page

It works fine, now it perfectly fit my needs. Thanks ! On 9 Mar 2009, at 19:49, Petr Kobalíček wrote: > Hi, interesting:) > > Progress bar can be centered by this way: > - set pbor position to relative > - set pbor left and right margin to auto > > this should work;-) But it centers it only hori

Re: [qooxdoo-devel] qxbuild startup page

Hi, interesting:) Progress bar can be centered by this way: - set pbor position to relative - set pbor left and right margin to auto this should work;-) But it centers it only horizontally, vertical centering is a bit harder:( 2009/3/9 Jean-Baptiste BRIAUD -- Novlog : > Hi, > Here is the startup

[qooxdoo-devel] qxbuild startup page

Hi, Here is the startup page I manage to get with qxbuild. I still wonder how it could be possible to center the progress bar ... The simple idea for that page is that one can place all the stuff inside the HERE THE STUFF That stuff will be removed when the application is ready. I put in bo

[qooxdoo-devel] qxbuild and IE7

Hi devs, I have problem running qxbuild with IE7 (maybe IE6 too, not tested). I think that this problem is related to qooxdoo and not qxbuild, because qxbuild is de facto only qooxdoo with all components built-in. Error is here if(!document.namespaces["v"]){document.namespaces.add("v","urn:schem

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

On 7 Mar 2009, at 15:56, Petr Kobalíček wrote: > Hi Jean, > > thanks :) > >> About the loading bar : when finish, why only remove >> body.removeChild(pbor); and why not also remove >> body.removeChild(pbar); ? > > When you remove pbor (progress border), the pbar is not active anymore > and I hope

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

Hi Jean, thanks :) > About the loading bar : when finish, why only remove > body.removeChild(pbor); and why not also remove > body.removeChild(pbar); ? When you remove pbor (progress border), the pbar is not active anymore and I hope that browser's garbage collector will free all of these:) > A

Re: [qooxdoo-devel] qxbuild for 0.8.2 ready

it works fine for me, thanks for your work ! About the loading bar : when finish, why only remove body.removeChild(pbor); and why not also remove body.removeChild(pbar); ? About the starting page that contain the loading bar, few idea I'm not sure how doable it is : have an HTML page where

[qooxdoo-devel] qxbuild for 0.8.2 ready

Hi devs, after some time hacking qooxdoo 0.8.2 I completed port of qxbuild for 0.8.2. It's not excellent, but it works and there is also possibility to add simple progress bar for loading javascript files. Changes to previous versions: - There are no contribs now, if you need contrib, you need

Re: [qooxdoo-devel] qxbuild

+1, nothing else to add. On 6 Mar 2009, at 23:46, Petr Kobalíček wrote: > I have only one thing to say:) > > There are developers (including me and Jean) that wants to use qooxdoo > without python build tools (I have python, I'm building qxbuild:) ). I > think that we shouldn't talk about why the

Re: [qooxdoo-devel] qxbuild

I have only one thing to say:) There are developers (including me and Jean) that wants to use qooxdoo without python build tools (I have python, I'm building qxbuild:) ). I think that we shouldn't talk about why they needs to do it, but we should talk about how it's possible and how it's portable

Re: [qooxdoo-devel] qxbuild

Jean-Baptiste, > I got my answer : as it is needed to use the py machinery each time a > class is added, I won't be able to use it because this happen at > runtime for me. > It would be fine with the create-application.py as this one is needed > only once, but I can't cope with generate.py as appa

Re: [qooxdoo-devel] qxbuild

On Fri, Mar 6, 2009 at 3:48 PM, Petr Kobalíček wrote: > Hi Derrell, > > qxbuild is that solution you are talking about;-) > Oh! Wonderful! I though qxbuild used to be the OUTPUT of a build. If qxbuild is now just a simple config.json file that people can use to create their own qooxdoo class libr

Re: [qooxdoo-devel] qxbuild

On 6 Mar 2009, at 21:28, Derrell Lipman wrote: On Fri, Mar 6, 2009 at 3:03 PM, Jean-Baptiste BRIAUD -- Novlog > wrote: I got my answer No, I don't think you did. :-) : as it is needed to use the py machinery each time a class is added, I won't be able to use it because this happen at runtime f

Re: [qooxdoo-devel] qxbuild

Hi Derrell, qxbuild is that solution you are talking about;-) Cheers - Petr 2009/3/6 Derrell Lipman : > On Fri, Mar 6, 2009 at 3:03 PM, Jean-Baptiste BRIAUD -- Novlog > wrote: >> >> I got my answer > > No, I don't think you did. :-) > >> >> : as it is needed to use the py machinery each time a

Re: [qooxdoo-devel] qxbuild

On Fri, Mar 6, 2009 at 3:03 PM, Jean-Baptiste BRIAUD -- Novlog < j-b.bri...@novlog.com> wrote: > I got my answer No, I don't think you did. :-) > : as it is needed to use the py machinery each time a > class is added, I won't be able to use it because this happen at > runtime for me. It is p

Re: [qooxdoo-devel] qxbuild

I got my answer : as it is needed to use the py machinery each time a class is added, I won't be able to use it because this happen at runtime for me. It would be fine with the create-application.py as this one is needed only once, but I can't cope with generate.py as apparently, this one i

Re: [qooxdoo-devel] qxbuild

> I must have misundertood lots of things with that py build, that > discussion leave me the impression that the py build is not different > than the qxbuild approach :-) > Indeed, all I'm saying is that what Petr achieves with a hand-crafted qxbuild is also achievable using standard qoox

Re: [qooxdoo-devel] qxbuild

Hi all, I think that discussion is going outside the base concept. I think that qooxdoo can be used without python and I will support this using of qooxdoo long time. My problem is that dark-feature (as called by Alex) was used together with qxbuild and now it's broken. My current idea is to crea

Re: [qooxdoo-devel] qxbuild

On 6 Mar 2009, at 16:24, thron7 wrote: > >> To keep qooxdoo as a general purpose framework, I would suggest to >> let >> open the fact that for some people, having Python might be a blocker. >> I would not like to go too far that way as it is not the problem I'm >> really facing technically, bu

Re: [qooxdoo-devel] qxbuild

> To keep qooxdoo as a general purpose framework, I would suggest to let > open the fact that for some people, having Python might be a blocker. > I would not like to go too far that way as it is not the problem I'm > really facing technically, but even that said, I'm not really keen to > us

Re: [qooxdoo-devel] qxbuild

See the discussion in the text. On 6 Mar 2009, at 14:20, thron7 wrote: > > Jean-Baptiste BRIAUD -- Novlog wrote: >> Don't scare me too much : we had lots of discussion about how to use >> qoxdoo without the py build and at that time it didn't look too bad >> to >> do that. >> As some messages sh

Re: [qooxdoo-devel] qxbuild

Jean-Baptiste BRIAUD -- Novlog wrote: > Don't scare me too much : we had lots of discussion about how to use > qoxdoo without the py build and at that time it didn't look too bad to > do that. > As some messages show it here, we are several apprently using qooxdoo > without py build. > I un

Re: [qooxdoo-devel] qxbuild

Don't scare me too much : we had lots of discussion about how to use qoxdoo without the py build and at that time it didn't look too bad to do that. As some messages show it here, we are several apprently using qooxdoo without py build. I understand lots of good work had been done for optimis

Re: [qooxdoo-devel] qxbuild

Hi Petr, Petr Kobalíček wrote: > Hi Alex, > > thanks for response. > > So is there any way to use the loader or to force it to load my script > files or it's deprecated and it will be completely removed in the > future? I mean what 'parts' are now working within qooxdoo? I think > that loader will

Re: [qooxdoo-devel] qxbuild

Hi Petr, > So is there any way to use the loader or to force it to load my script > files or it's deprecated and it will be completely removed in the > future? I mean what 'parts' are now working within qooxdoo? I think > that loader will remain;) The URIs will be corrected in the future. If you b

Re: [qooxdoo-devel] qxbuild

Hi Jean, how are you :-) ? It's nice to hear that you are still using qxbuild;) Are you using it with 0.8.2 ? I can compile it, but the loader is an issue for me:( I worked some time in one opensource project in C++ (i really like C++) and I'm completelly skipped 0.8.1 release, now I'm back to i

Re: [qooxdoo-devel] qxbuild

Hi Alex, thanks for response. So is there any way to use the loader or to force it to load my script files or it's deprecated and it will be completely removed in the future? I mean what 'parts' are now working within qooxdoo? I think that loader will remain;) What can you recommend me to do to

Re: [qooxdoo-devel] qxbuild

Hi Petr, Please to hear that : the qxbuild for 0.8.2 not the issue :-) I jump the 0.8.1 as I really need qxbuild to use qooxdoo. On 6 Mar 2009, at 01:13, Petr Kobalíček wrote: > Hi devs, > > after some time not developing in qooxdoo I'm back. I want to update > qxbuild to be able to sucessfully

Re: [qooxdoo-devel] qxbuild

Hi Petr, On Friday 06 March 2009 Petr Kobalíček wrote: > To be exact, > > I modified generated files to contain this: > > qx.$$loader = { > parts : {"boot":[0]}, > uris : [qxscripts], > boot : "boot" > }; This part is still in the generated JS file, but it is bogus - the loading mechanism d

Re: [qooxdoo-devel] qxbuild

To be exact, I modified generated files to contain this: qx.$$loader = { parts : {"boot":[0]}, uris : [qxscripts], boot : "boot" }; qxscripts is array of my files to load, but there is no network communication and qooxdoo complains that there is no application (not loaded, this is logical)

[qooxdoo-devel] qxbuild

Hi devs, after some time not developing in qooxdoo I'm back. I want to update qxbuild to be able to sucessfully build 0.8.2 and SVN. I tried it now and I have some problems. First I see is that there is now only 1 javascript file generated per one build type (build or debug), I tried to look at g

[qooxdoo-devel] qxbuild issue

Hi, I try to use qxbuild in order to have my own qooxdoo all in one file from qooxdoo SVN HEAD using Petr qxbuild.zip. I think I put everything at the places specified in the readme file but after having launched generate.py compile-qx I got this error message : [CUT] = = = = ===

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

I have updated qxbuild and new SVN version is ready for download. I will update it each 14 days with SVN version that works for me Cheers - Petr 2008/9/12 Petr Kobalíček <[EMAIL PROTECTED]>: > Hi Ambo, > > there aren't extra resources in qxbuild. Only resources needed by > qooxdoo itself. > > If

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

Hi Ambo, there aren't extra resources in qxbuild. Only resources needed by qooxdoo itself. If you have resources you want to use, i'm using this: qx.util.AliasManager.getInstance().add("youricon", "/some/address/"); var btn2 = new qx.ui.form.Button("My Button", "youricon/22/apps/internet-mail.p

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

Hi Petr, If I need a button with icon: var btn2 = new qx.ui.form.Button("My Button", "icon/22/apps/internet-mail.png"); no icon appear with button. What I did wrong?. Ambo Dalle - This SF.Net email is sponsored by the Mobli

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

It worked fine for me ! Thanks again. On 10 Sep 2008, at 12:36, Petr Kobalíček wrote: > Hu guys, > > I try to answer:) > > First, the HtmlArea widget is not included in this biuld. I'm using > it, so it's only commented. The reason that not icluding this widget > is that it's in development and

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

Hu guys, I try to answer:) First, the HtmlArea widget is not included in this biuld. I'm using it, so it's only commented. The reason that not icluding this widget is that it's in development and there are some bugs (so it has no sense to have it in stable build). Second, Jean, did you try to ru

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

Hi Petr, I took your file, unzip it and try to figure out what should I pickup ... without success. I've seen the qx-build js files in the script folder but I guess I'll have to also pickup some ressources ? What should I copy/past from your folder to my webroot ? On 10 Sep 2008, at 00:37,

Re: [qooxdoo-devel] qxbuild - complete qooxdoo build

Hi Petr, Very nice initiative, this feature was abandoned since qx 0.6. I have a little question regarding the contrib inclusion, I have seen in your config.json that you have included HTMLArea widget. I've tried this code in custom.js file : qx.Class.define("custom.Application", { extend : qx

[qooxdoo-devel] qxbuild - complete qooxdoo build

Hi all, qxbuild - the full qooxdoo build is ready for download. It's on my server for now, but in the future this will be contribuion project to qooxdoo. So start downloading! :-) http://kobalicek.com/res/files/js/qxbuild.zip The documentation is in readme.txt file and there is also small exa