RE: DownloadLink and ProgressBar

2013-11-20 Thread Paul Bors
I would be wrong to show a 0% - 100% status bar.

You might want to switch back to an indeterminate progress bar and do what
Apple does during OS X install, show a label letting the user of your
estimate such as Approximately 5 minutes remaining or Less than a minute
remaning.

~ Thank you,
  Paul Bors

-Original Message-
From: seyaw [mailto:seidy...@gmail.com] 
Sent: Monday, November 18, 2013 2:25 PM
To: users@wicket.apache.org
Subject: RE: DownloadLink and ProgressBar

Yes Paul, getting the progress of the file generation is one of my challenge
right now. The file generation is, in my case is not linear. For example,
the time it takes for different procedures is depend on the project size.
Currently, I just make a rough estimation so that the user at least can see
the file generation is in progress. 



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Re: DownloadLink and ProgressBar

2013-11-18 Thread Martin Grigorov
Hi,

I haven't seen a web application that shows progress bar for download.
The browser itself shows such information - Google Chrome in the
bottom-left corner, Firefox in its download window/manager.


On Sat, Nov 16, 2013 at 11:40 AM, Ernesto Reinaldo Barreiro 
reier...@gmail.com wrote:

 Hi,


 1-Replace the download link by an AJAX link.
 2-Launch file generation on a background thread. Pass a class to this
 thread that serves as context fro passing information from generating
 thread with web threads (keeping a reference to thisi context on the page).
 3-Make a progress panel visible + an AJAX timer that pols the server for
 progress.


Point 3) won't work if the file download is from a resource linked to the
page. And it is thru DownloadLink.
In this case the ajax timer won't be able to reach the page at all.

The app should use a mounted/shared resource.
see wicket-extensions' UploadProgressBar and/or follow the progress of
https://github.com/l0rdn1kk0n/wicket-bootstrap/issues/262 for example. Both
are related to *upload*, not download.


 4-Once file is generated replace progress panel with a download link (or
 use trick in [1] to trigger file dowmload)

 References

 1-

 https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow


 On Sat, Nov 16, 2013 at 10:29 AM, seyaw seidy...@gmail.com wrote:

  Hi All,
  I have a wicket DownloadLink where I generate file dynamically and
 download
  it. It works.
  The process of dynamic File generation might take some time and like to
  show
  ProgressBar which show how much the generation has progressed. How Can I
 do
  that.
 
  I am using wicket 1.5.8
  Thank you very much.
 
   add(new DownloadLink(export, new LoadableDetachableModelFile()
  {
  private static final long serialVersionUID =
  840863954694163375L;
 
  @Override
  protected File load()
  {
  File exportTempDir = getGeneratedFile();
  }
  }
 
 
 
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 --
 Regards - Ernesto Reinaldo Barreiro



Re: DownloadLink and ProgressBar

2013-11-18 Thread Ernesto Reinaldo Barreiro
Martin,

Thanks for your comments.

On Mon, Nov 18, 2013 at 9:10 AM, Martin Grigorov mgrigo...@apache.orgwrote:

 Hi,

 I haven't seen a web application that shows progress bar for download.
 The browser itself shows such information - Google Chrome in the
 bottom-left corner, Firefox in its download window/manager.


I'm not talking of a progress bar for download. I'm talking of showing a
progress bar for file generation (a file that takes too long to generate).
Once file is generated download will be triggered.  I have implemented a
similar use case several times before.


  1-Replace the download link by an AJAX link.
  2-Launch file generation on a background thread. Pass a class to this
  thread that serves as context fro passing information from generating
  thread with web threads (keeping a reference to thisi context on the
 page).
  3-Make a progress panel visible + an AJAX timer that pols the server for
  progress.
 

 Point 3) won't work if the file download is from a resource linked to the
 page. And it is thru DownloadLink.
 In this case the ajax timer won't be able to reach the page at all.


? Not following you. Page and thread generating the file will share a
context the file generating thread will use to update WEB threads about
status of generation (e.g. progress info). All the AJAX timer will do is
poll the page and ask for this information. Once file is generated timer
will disable itself and trigger download (or display a new panel with
download link). Again I have implemented something similar more than once
in my life.



 The app should use a mounted/shared resource.
 see wicket-extensions' UploadProgressBar and/or follow the progress of
 https://github.com/l0rdn1kk0n/wicket-bootstrap/issues/262 for example.
 Both
 are related to *upload*, not download.


Yes I know the limitation of serving resources from pages. Maybe one
variation of this is that the timer just points to the mounted resource in
order to trigger the actual download. That is not more difficult to achieve
that downloading from page.

Shall I build a small mini app illustrating this? Maybe it can be useful to
other users?

-- 
Regards - Ernesto Reinaldo Barreiro


Re: DownloadLink and ProgressBar

2013-11-18 Thread Martin Grigorov
I didn't read the question correctly.
It indeed talks about showing progress for the generation process, not the
download.


On Mon, Nov 18, 2013 at 10:39 AM, Ernesto Reinaldo Barreiro 
reier...@gmail.com wrote:

 Martin,

 Thanks for your comments.

 On Mon, Nov 18, 2013 at 9:10 AM, Martin Grigorov mgrigo...@apache.org
 wrote:

  Hi,
 
  I haven't seen a web application that shows progress bar for download.
  The browser itself shows such information - Google Chrome in the
  bottom-left corner, Firefox in its download window/manager.
 

 I'm not talking of a progress bar for download. I'm talking of showing a
 progress bar for file generation (a file that takes too long to generate).
 Once file is generated download will be triggered.  I have implemented a
 similar use case several times before.


   1-Replace the download link by an AJAX link.
   2-Launch file generation on a background thread. Pass a class to this
   thread that serves as context fro passing information from generating
   thread with web threads (keeping a reference to thisi context on the
  page).
   3-Make a progress panel visible + an AJAX timer that pols the server
 for
   progress.
  
 
  Point 3) won't work if the file download is from a resource linked to the
  page. And it is thru DownloadLink.
  In this case the ajax timer won't be able to reach the page at all.
 

 ? Not following you. Page and thread generating the file will share a
 context the file generating thread will use to update WEB threads about
 status of generation (e.g. progress info). All the AJAX timer will do is
 poll the page and ask for this information. Once file is generated timer
 will disable itself and trigger download (or display a new panel with
 download link). Again I have implemented something similar more than once
 in my life.


 
  The app should use a mounted/shared resource.
  see wicket-extensions' UploadProgressBar and/or follow the progress of
  https://github.com/l0rdn1kk0n/wicket-bootstrap/issues/262 for example.
  Both
  are related to *upload*, not download.
 

 Yes I know the limitation of serving resources from pages. Maybe one
 variation of this is that the timer just points to the mounted resource in
 order to trigger the actual download. That is not more difficult to achieve
 that downloading from page.

 Shall I build a small mini app illustrating this? Maybe it can be useful to
 other users?

 --
 Regards - Ernesto Reinaldo Barreiro



Re: DownloadLink and ProgressBar

2013-11-18 Thread seyaw
Hi Ernesto,
A working example might be helpful.
Thank you



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Re: DownloadLink and ProgressBar

2013-11-18 Thread Martin Grigorov
I think
https://github.com/wicketstuff/core/tree/master/jdk-1.6-parent/progressbar-parent
has
such examples


On Mon, Nov 18, 2013 at 10:52 AM, seyaw seidy...@gmail.com wrote:

 Hi Ernesto,
 A working example might be helpful.
 Thank you



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Re: DownloadLink and ProgressBar

2013-11-18 Thread Ernesto Reinaldo Barreiro
Thanks for the pointer!


On Mon, Nov 18, 2013 at 10:54 AM, Martin Grigorov mgrigo...@apache.orgwrote:

 I think

 https://github.com/wicketstuff/core/tree/master/jdk-1.6-parent/progressbar-parent
 has
 such examples


 On Mon, Nov 18, 2013 at 10:52 AM, seyaw seidy...@gmail.com wrote:

  Hi Ernesto,
  A working example might be helpful.
  Thank you
 
 
 
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 http://apache-wicket.1842946.n4.nabble.com/DownloadLink-and-ProgressBar-tp4662451p4662485.html
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-- 
Regards - Ernesto Reinaldo Barreiro


RE: DownloadLink and ProgressBar

2013-11-18 Thread Paul Bors
How do you track the progress of your file generation in order to show the
status bar?

~ Thank you,
  Paul Bors

-Original Message-
From: seyaw [mailto:seidy...@gmail.com] 
Sent: Monday, November 18, 2013 3:52 AM
To: users@wicket.apache.org
Subject: Re: DownloadLink and ProgressBar

Hi Ernesto,
A working example might be helpful.
Thank you



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Re: DownloadLink and ProgressBar

2013-11-18 Thread Ernesto Reinaldo Barreiro
What do you mean? How to compute how much has been generated? Or how to
pass this info to the client? Or something else?


On Mon, Nov 18, 2013 at 8:00 PM, Paul Bors p...@bors.ws wrote:

 How do you track the progress of your file generation in order to show the
 status bar?

 ~ Thank you,
   Paul Bors

 -Original Message-
 From: seyaw [mailto:seidy...@gmail.com]
 Sent: Monday, November 18, 2013 3:52 AM
 To: users@wicket.apache.org
 Subject: Re: DownloadLink and ProgressBar

 Hi Ernesto,
 A working example might be helpful.
 Thank you



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-- 
Regards - Ernesto Reinaldo Barreiro


RE: DownloadLink and ProgressBar

2013-11-18 Thread seyaw
Yes Paul, getting the progress of the file generation is one of my challenge
right now. The file generation is, in my case is not linear. For example,
the time it takes for different procedures is depend on the project size.
Currently, I just make a rough estimation so that the user at least can see
the file generation is in progress. 



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Re: DownloadLink and ProgressBar

2013-11-17 Thread Ernesto Reinaldo Barreiro
Do you want me to build a little example for this?


On Sat, Nov 16, 2013 at 7:59 PM, seyaw seidy...@gmail.com wrote:

 Thank you Ernesto for your prompt response.
 1. is okay.
 Then for 2. I suppose I start the thread from the onclick method of the
 ajax
 link. Can you explain a bit how to start the file genaration with a thread?
 and for 3. how to pol the server for the progress?

 Thank you very much



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-- 
Regards - Ernesto Reinaldo Barreiro


Re: DownloadLink and ProgressBar

2013-11-17 Thread seyaw
Dear Ernesto
Thank you very much for your help. Your comments were very helpful.
I solve the problem as you suggested with little modification
1. follow the reference you mention [1]
2. add AjaxLink that will generate a file

 add(new AjaxLink(download)
{
@Override
public void onClick(final AjaxRequestTarget target)
{

bar.start(target);

new Thread()
{
public void run()
{
generateFile
}.
3. add a progressbar (from wicketstuff) and on its onFinsh method, trigger
the file download

 Progress = new ProgressBar(progress, new ProgressionModel()
{

protected Progression getProgression()
{
return new Progression(progress);
}
})
{

protected void onFinished(AjaxRequestTarget target)
{
download.initiate(target, fileName);
}
progress.add(download)
add(progress)

My only problem now is I have to guess the progress of file genaration , to
be dispalyed on the progress bar

thank you very much




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Re: DownloadLink and ProgressBar

2013-11-17 Thread Ernesto Reinaldo Barreiro
Create a class that implements Runnable. Find how to launch a runnable
(e.g. using a thread pool). Keep a reference to this runnable and use some
property of it to track progress. Use an AJAX timer to pol for this value.


On Sun, Nov 17, 2013 at 10:14 AM, seyaw seidy...@gmail.com wrote:

 Dear Ernesto
 Thank you very much for your help. Your comments were very helpful.
 I solve the problem as you suggested with little modification
 1. follow the reference you mention [1]
 2. add AjaxLink that will generate a file

  add(new AjaxLink(download)
 {
 @Override
 public void onClick(final AjaxRequestTarget target)
 {

 bar.start(target);

 new Thread()
 {
 public void run()
 {
 generateFile
 }.
 3. add a progressbar (from wicketstuff) and on its onFinsh method, trigger
 the file download

  Progress = new ProgressBar(progress, new ProgressionModel()
 {

 protected Progression getProgression()
 {
 return new Progression(progress);
 }
 })
 {

 protected void onFinished(AjaxRequestTarget target)
 {
 download.initiate(target, fileName);
 }
 progress.add(download)
 add(progress)

 My only problem now is I have to guess the progress of file genaration , to
 be dispalyed on the progress bar

 thank you very much




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-- 
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Re: DownloadLink and ProgressBar

2013-11-16 Thread Ernesto Reinaldo Barreiro
Hi,


1-Replace the download link by an AJAX link.
2-Launch file generation on a background thread. Pass a class to this
thread that serves as context fro passing information from generating
thread with web threads (keeping a reference to thisi context on the page).
3-Make a progress panel visible + an AJAX timer that pols the server for
progress.
4-Once file is generated replace progress panel with a download link (or
use trick in [1] to trigger file dowmload)

References

1-
https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow


On Sat, Nov 16, 2013 at 10:29 AM, seyaw seidy...@gmail.com wrote:

 Hi All,
 I have a wicket DownloadLink where I generate file dynamically and download
 it. It works.
 The process of dynamic File generation might take some time and like to
 show
 ProgressBar which show how much the generation has progressed. How Can I do
 that.

 I am using wicket 1.5.8
 Thank you very much.

  add(new DownloadLink(export, new LoadableDetachableModelFile()
 {
 private static final long serialVersionUID =
 840863954694163375L;

 @Override
 protected File load()
 {
 File exportTempDir = getGeneratedFile();
 }
 }



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-- 
Regards - Ernesto Reinaldo Barreiro


Re: DownloadLink and ProgressBar

2013-11-16 Thread seyaw
Thank you Ernesto for your prompt response.
1. is okay. 
Then for 2. I suppose I start the thread from the onclick method of the ajax
link. Can you explain a bit how to start the file genaration with a thread?
and for 3. how to pol the server for the progress?

Thank you very much



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