[Qt-interest] Generic Question

Tue Nov 1 05:55:30 CET 2011

How to use signal from base class and slot from the inherited class.

OpenCViso::OpenCViso():MainWindow()  //constructor for class OpenCViso inheriting (public) class Mainwindow
{

    connect(this,SIGNAL(BeginExec()),this,SLOT(LoadCalibParam()));
}

BeginExec() is defined in the class MainWindow as a signal.LoadCalibParam() is defined in OpenCViso as a public slot.
I get the following error

Object::connect: No such slot MainWindow::LoadCalibParam() in opencviso.cpp:6
Object::connect:  (sender name:   'MainWindow')
Object::connect:  (receiver name: 'MainWindow')
I am a novice.
Thanks
> From: qt-interest-request at qt.nokia.com
> Subject: Qt-interest Digest, Vol 11, Issue 107
> To: qt-interest at qt.nokia.com
> Date: Mon, 31 Oct 2011 17:59:34 +0100
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> Today's Topics:
> 
>    1. Re: qmake (Graham Labdon)
>    2. Re: Qt 4.7.4 - animation (John Weeks)
>    3. Directory Dialog Performance Issue (Sudheesh Krishnankutty)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 31 Oct 2011 15:33:03 +0000
> From: Graham Labdon <Graham.Labdon at avalonsciences.com>
> Subject: Re: [Qt-interest] qmake
> To: Thiago Macieira <thiago at kde.org>, "qt-interest at qt.nokia.com"
> 	<qt-interest at qt.nokia.com>
> Message-ID:
> 	<DA78E044FB673F438F102FC52CA4A62C0535032A at ASLUKEXSVR.avalonsciences.local>
> 	
> Content-Type: text/plain; charset="us-ascii"
> 
> Thanks!
> 
> -----Original Message-----
> From: qt-interest-bounces+graham.labdon=avalonsciences.com at qt.nokia.com [mailto:qt-interest-bounces+graham.labdon=avalonsciences.com at qt.nokia.com] On Behalf Of Thiago Macieira
> Sent: 31 October 2011 15:08
> To: qt-interest at qt.nokia.com
> Subject: Re: [Qt-interest] qmake
> 
> On Monday, 31 de October de 2011 14:56:05 Graham Labdon wrote:
> > Hello list
> > 
> > I have a .pro file that when I run qmake under windows generates 
> > Makefile Makefile.release Makefile.debug
> > 
> > When I run qmake on the same .profile under linux I only get a single 
> > make file that produces a release verison
> > 
> > Why are these different?
> 
> Because your Qt on Windows was built in debug-and-release mode, while the one on Linux was probably built on release-only mode.
> 
> > How can I get a debug version on Linux?
> 
> qmake CONFIG-=release CONFIG+=debug
> 
> --
> Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
>    Software Architect - Intel Open Source Technology Center
>       PGP/GPG: 0x6EF45358; fingerprint:
>       E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Mon, 31 Oct 2011 09:26:23 -0700
> From: John Weeks <john at wavemetrics.com>
> Subject: Re: [Qt-interest] Qt 4.7.4 - animation
> To: Ridvan Sonmez <rsonmez2002 at yahoo.com>
> Cc: "qt-interest at qt.nokia.com" <qt-interest at qt.nokia.com>
> Message-ID: <D09E9AFC-970D-4825-824D-CC89C820E0B2 at wavemetrics.com>
> Content-Type: text/plain; charset="us-ascii"
> 
> 
> On 31-Oct-2011, at 12:31 AM, Ridvan Sonmez wrote:
> 
> > Hello 
> > 
> > i am trying to understand from your (Qt) documentation example for animations named "stickman".  There is a
> > problem for me -  what is type of these resource files "chilling","dancing" etc. inside of  "resources" dir. How i see they 
> > are bin files but how do you (with which tool) create them ? i suppose this is not secret - becouse there isn't Do you may help me - i want to create similar
> > animation scene and learn animation in better way or even "improve" some things inside of these classes. 
> 
> I would read the file animation.cpp. There are suggestively-named methods there, like Animation::save and Animation::load.
> 
> Regards, John Weeks
> 
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> 
> Message: 3
> Date: Mon, 31 Oct 2011 22:29:23 +0530
> From: "Sudheesh Krishnankutty" <sudheesh at softjin.com>
> Subject: [Qt-interest] Directory Dialog Performance Issue
> To: <qt-interest at qt.nokia.com>
> Message-ID: <000c01cc97ee$7183b790$548b26b0$@com>
> Content-Type: text/plain; charset="us-ascii"
> 
> Hi,
> 
>  
> 
> In the attached project, I am using two types of directory browse dialogs.
> One using the static method QFileDialog::getExistingDirectory() and the
> other one by sub-classing the QFileDialog class. 
> 
> My observation is that when there are many mapped drives ( z mapped to
> <file:///\\pc1\share1> \\pc1\share1 y mapped to  <file:///\\pc2\share2>
> \\pc2\share2 etc..) the MyFileDialog is very slow. If any of the mapped
> systems are offline, then the MyFileDialog becomes even slower. 
> 
> can you pls explain why MyFileDialog is very very slow when compared to the
> Native dialog (static method). 
> 
> We prefer using the MyFileDialog. Is there a way I can speed up the
> MyFileDialog?
> 
>  
> 
> Regards,
> 
> Sudheesh
> 
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