Installation and getting started with first app

KennedyDayala

I have installed CentOS 5.5 yesterday and tried to install Qt..could you please gimme those commands to check if that lib is existing and its verson ??

andre

For linux help, you're on the wrong channel. Sorry. This is not Qt related anymore.

KennedyDayala

I agree..but it happened while i tried to install Qt on Linux...help is appreciated more

vinb

http://wiki.centos.org/HowTos#head-70ff04f00f6b441f231663b09d7716f4f771a436

KennedyDayala

thanks amn..I will go through that link now..

btw I have this compiler error when I compiled my demo app on windows using QTreeView which I am planning to display the SystemStorage info

In file included from ..\IDT_Demo_UI\main.cpp:2:
..\IDT_Demo_UI/idt_mainwindow.h:23: error: ISO C++ forbids declaration of 'QSystemStorageInfo' with no type
..\IDT_Demo_UI/idt_mainwindow.h:23: error: expected ';' before '*' token

vinb

its say were you have to look!
ĺine 23 of the file idt_mainwindow.h, you didnt end the line with ; or/and you didnt include QSystemStorageInfo

giesbert

Or you only declared the type like
@
class QSystemStorageInfo;
@
and use it as member. This is not allowed. If you use it for pointers, declaration like above should work.

KennedyDayala

Gerolf...I have included
#include <QSystemStorageInfo>

and this is the complete compilation report

@
Running build steps for project IDT_Demo_UI...
Configuration unchanged, skipping qmake step.

Starting: "C:\QtSDK\mingw\bin\mingw32-make.exe" -w

mingw32-make: Entering directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

C:/QtSDK/mingw/bin/mingw32-make -f Makefile.Debug

mingw32-make[1]: Entering directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

g++ -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include\QtCore" -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include\QtGui" -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include" -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include\ActiveQt" -I"debug" -I"." -I"..\IDT_Demo_UI" -I"." -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\mkspecs\win32-g++" -o debug\main.o ..\IDT_Demo_UI\main.cpp

In file included from ..\IDT_Demo_UI\main.cpp:2:

..\IDT_Demo_UI/idt_mainwindow.h:4:30: error: QSystemStorageInfo: No such file or directory

In file included from ..\IDT_Demo_UI\main.cpp:2:

..\IDT_Demo_UI/idt_mainwindow.h:23: error: ISO C++ forbids declaration of 'QSystemStorageInfo' with no type

..\IDT_Demo_UI/idt_mainwindow.h:23: error: expected ';' before '*' token

mingw32-make[1]: Leaving directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

mingw32-make: Leaving directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

mingw32-make[1]: *** [debug/main.o] Error 1

mingw32-make: *** [debug] Error 2

The process "C:\QtSDK\mingw\bin\mingw32-make.exe" exited with code 2.

Error while building project IDT_Demo_UI (target: Desktop)
@

When executing build step 'Make'

and this is .h file

@
#ifndef IDT_MAINWINDOW_H
#define IDT_MAINWINDOW_H

#include <QSystemStorageInfo>
#include <QtGui>
#include <QMainWindow>

namespace Ui {
class IDT_MainWindow;
}

class IDT_MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit IDT_MainWindow(QWidget *parent = 0);
~IDT_MainWindow();

private:
Ui::IDT_MainWindow *ui;

QSystemStorageInfo *sti;

};

#endif // IDT_MAINWINDOW_H

@

vinb

please wrap your code with @ tag

KennedyDayala

I am realy sorry vinb...I didn't get you !! how to rap with a tag ??

vinb

i dont think "QSystemStorageInfo" exist in Qt,
only:
QSysInfo
QSystemLocale
QSystemSemaphore
QSystemTrayIcon

If it is your own made you have to use "" instead of <>.

vinb

use @
then your code and end with "@" without the ""

giesbert

Your problem lies more in the beginning of your build output:

@
..\IDT_Demo_UI/idt_mainwindow.h:4:30: error: QSystemStorageInfo: No such file or directory
@

where does QSystemStorageInfo come from?

If I googled correctly, it's part of QtMobility, did you install that? did you add the needed include paths in the pro file?

KennedyDayala

ok...then which class should i use to get the system storage info if it is for desktop application ?

giesbert

Afaik QtMobility may also be used on the Desktop. But you have to set your include paths.

KennedyDayala

please guide me how to set that ...

giesbert

I said Afaik, not that I did it before ;-)

I never used QtMobility

goetz

[quote author="Thomas Kennedy" date="1301490967"]ok...then which class should i use to get the system storage info if it is for desktop application ?[/quote]

I don't know what info you want to get from QSystemStorageInfo, but maybe "QDesktopServices::storageLocation() ":http://doc.qt.nokia.com/4.7/qdesktopservices.html#storageLocation provides what you need.

mlong

In order to use the QSystemStorageInfo class from Mobility, be sure that in your .pro file you have included the lines

@
CONFIG += mobility
MOBILITY += systeminfo
@

KennedyDayala

Thanks a lot...

without changing .pro file I am trying with QDir::Drives()..I will update you soon about my results..before that I have another query...

I have placed my controls on the main window by opening 'mainwindow.ui' in design mode..how would I create control variables for those controls in my code using QTCreator ?