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Qt-solutions Archive, February 2007
Hide all rows in QTable

Message 1 in thread

Hi all,

I am developing an application that uses QTable. My application requires 300,000 rows. 

I want to hide all rows at startup.

If I use function hideRow(int row), I need to execute same function 300,000 times.

But this is not feasible, rows hiding will take more than 1/2 hour.

 

Can any one suggest some other efficient alternative?

 

Regards,
Vijay_Mehta 
Satyam Computers, BLA
 


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Message 2 in thread

I don't see a QT Solution for QTable. perhaps you should try the other
mailing list, QT-Interest.

-----Original Message-----
From: Vijay_Mehta [mailto:Vijay_Mehta@xxxxxxxxxx] 
Sent: Thursday, February 08, 2007 9:35 AM
To: qt-solutions@xxxxxxxxxxxxx
Subject: Hide all rows in QTable


Hi all,

I am developing an application that uses QTable. My application requires
300,000 rows. 

I want to hide all rows at startup.

If I use function hideRow(int row), I need to execute same function
300,000 times.

But this is not feasible, rows hiding will take more than 1/2 hour.

 

Can any one suggest some other efficient alternative?

 

Regards,

Vijay_Mehta 

Satyam Computers, BLA

 



DISCLAIMER:
This email (including any attachments) is intended for the sole use of
the intended recipient/s and may contain material that is CONFIDENTIAL
AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or
copying or distribution or forwarding of any or all of the contents in
this message is STRICTLY PROHIBITED. If you are not the intended
recipient, please contact the sender by email and delete all copies;
your cooperation in this regard is appreciated..
Message 3 in thread

QTable is not designed to handle large amounts of rows and/or columns. Since
you can never show all the items at once (screen and/or paper limitations),
you only need the ones that are showing in the table at any given moment.
Use the MVC architecture to show only the ones that are currently in the
display area.

Or try QicsTable 
<http://www.ics.com/products/qt/qtgraphcharttable/qicstable/index.html>.

Keith

On 02-08-2007 11:35 AM, "Vijay_Mehta" wrote:

> Hi all,
> I am developing an application that uses QTable. My application requires
> 300,000 rows. 
> I want to hide all rows at startup.
> If I use function hideRow(int row), I need to execute same function 300,000
> times.
> But this is not feasible, rows hiding will take more than 1/2 hour.
>  
> Can any one suggest some other efficient alternative?
>  
> Regards,
> Vijay_Mehta 
> Satyam Computers, BLA
Message 4 in thread

Re: Hide all rows in QTableHai

I believe you can use setNumRows ( 0 ) which clears all cells from Table.

Regards
Deepa

  ----- Original Message ----- 
  From: Keith Esau 
  To: Qt Solutions 
  Sent: Thursday, February 08, 2007 11:19 PM
  Subject: Re: Hide all rows in QTable


  QTable is not designed to handle large amounts of rows and/or columns. Since you can never show all the items at once (screen and/or paper limitations), you only need the ones that are showing in the table at any given moment. Use the MVC architecture to show only the ones that are currently in the display area.

  Or try QicsTable <http://www.ics.com/products/qt/qtgraphcharttable/qicstable/index.html>.

  Keith

  On 02-08-2007 11:35 AM, "Vijay_Mehta" wrote:


    Hi all,
    I am developing an application that uses QTable. My application requires 300,000 rows. 
    I want to hide all rows at startup.
    If I use function hideRow(int row), I need to execute same function 300,000 times.
    But this is not feasible, rows hiding will take more than 1/2 hour.

    Can any one suggest some other efficient alternative?

    Regards,
    Vijay_Mehta 
    Satyam Computers, BLA
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Message 5 in thread

Qt3's QTable class can't handle a lot of items, but Qt4's QTableView can.  I 
made a blog entry earlier this year which showed off a little app I wrote 
that has a hundred and one million rows.

http://www.kdedevelopers.org/node/2491

-Benjamin Meyer

On Thursday 08 February 2007 18:49, Keith Esau wrote:
> QTable is not designed to handle large amounts of rows and/or columns.
> Since you can never show all the items at once (screen and/or paper
> limitations), you only need the ones that are showing in the table at any
> given moment. Use the MVC architecture to show only the ones that are
> currently in the display area.
>
> Or try QicsTable
> <http://www.ics.com/products/qt/qtgraphcharttable/qicstable/index.html>.
>
> Keith
>
> On 02-08-2007 11:35 AM, "Vijay_Mehta" wrote:
> > Hi all,
> > I am developing an application that uses QTable. My application requires
> > 300,000 rows.
> > I want to hide all rows at startup.
> > If I use function hideRow(int row), I need to execute same function
> > 300,000 times.
> > But this is not feasible, rows hiding will take more than 1/2 hour.
> >
> > Can any one suggest some other efficient alternative?
> >
> > Regards,
> > Vijay_Mehta
> > Satyam Computers, BLA

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