[Qt-interest] Generic Question

Tue Nov 1 07:43:53 CET 2011

First thing is have you included Q_OBJECT in the private section of your
derived class?
If yes then what is the signature of LoadCalibParam i.e does it have any
arguments? (assuming you would have declared LoadCalibParam as public slots
in the base class i.e in ManinWindow.)

On Tue, Nov 1, 2011 at 10:25 AM, aashish sheshadri
<aashish1989 at hotmail.com>wrote:

>  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
> >
> > Send Qt-interest mailing list submissions to
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> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Qt-interest digest..."
> >
> >
> > 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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> >
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> > End of Qt-interest Digest, Vol 11, Issue 107
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