Da-Crystal

Qt/Windows & VC++ 2008 Express – Part1

Posted November 28th @ 9:40 pm by da-crystal

10 Comments

1. jaime
   October 3, 2008 at 22:45

   hi man! thank u for this post but i still have a problem with:

   3. Edit PATH variable by appending the following path:

   ;%QTDIR%\bin

   i dont get it! what i do in here! then the examples r working good but the compiler dont let me execute couse dont detect the libs and the includes. please a little help i apreciate it too much

2. da-crystal
   October 4, 2008 at 04:40

   The perpose of step 3 of "System configure", to make QT(dll’s) visible to any program that need it.

   I’m assuming you have successfully done the other steps because it important.

   - Now, in the "Environment Variables" window there are two panels one for user variable and other for system.

   - From "System Variables", scroll down, to locate "Path" then double click it or select it then click on "Edit"

   - From "Edit System Variable" window, add ";%QTDIR%\bin" at the end of Variable value. make sure you have done step 2 in "System configure"

   To double check you configuration,in Command Prompt, execute the following command:

   "where QtCore4.dll"

   You should get the full path of "QtCore4.dll" as an answer.

   Note: sometime(never have) you need to restart your PC to get that in effect.

   Also, this may help: http://www.youtube.com/…/watch

3. suresh
   October 20, 2008 at 14:32

   A small convenience :

   Make a Qt property sheet and add to Qt related projects.

   Create a file Qt.vsprops and paste following

   <?xml version="1.0" encoding="Windows-1252"?>

   <VisualStudioPropertySheet

   ProjectType="Visual C++"

   Version="8.00"

   Name="Qt"

   >

   <Tool

   Name="VCCLCompilerTool"

   AdditionalIncludeDirectories="&quot;$(QTDIR)\include&quot;;&quot;$(QTDIR)\include\QtGui&quot;"

   />

   <Tool

   Name="VCLinkerTool"

   AdditionalDependencies="QtCore4.lib QtGui4.lib"

   AdditionalLibraryDirectories="&quot;$(QTDIR)\lib&quot;"

   />

   <Tool

   Name="VCResourceCompilerTool"

   AdditionalIncludeDirectories="$(QTDIR)\include"

   />

   <UserMacro

   Name="QTDIR"

   Value="C:\Qt\4.4.3"

   PerformEnvironmentSet="true"

   />

   </VisualStudioPropertySheet>

   For projects using Qt add above property sheet to project.

   View->Property Manager then add this file.

4. jaime
   October 21, 2008 at 03:02

   hi i did what u said, but the error that apears when execute an instance says:

   for example for tutorial1 t1.exe

   not can find the component

   not find QtOpenGLd4.dll. reinstall may help to solve the problem

   but i know the installation is fine. couse the qtdemo works, it sopouse that when i build an example in vc++ then i can play a new instance…

   or i have to start the instance from console??

5. da-crystal
   October 21, 2008 at 12:40

   @suresh: thanks very much, it is a cool and a smart way

   BTW, I’m using CMake in all my C++ projects which help in IDE configuration.

   @jaime: I think that happen because you are compiling and linking you code in debug mode where your Qt have been compiled as release. In your case, you might re-compile Qt to generate debug files or re-configure the Debug mode to link to Qt’s release one.

   I hope that will solve it. Waiting your feedback

6. Seth
   January 26, 2009 at 12:55

   Hi, I’ve followed your tutorial and set everything up as you’ve stated. In the cmd prompt i can execute "where QtCore4.dll" and get the correct path. When i try and compile a simple test program though,

   #include <QApplication>

   #include <QPushButton>

   int main(int argc, char *argv[])

   {

   QApplication app(argc, argv);

   QPushButton hello("Hello world!");

   hello.show();

   return app.exec();

   }

   this is what it spits out:

   1>—— Build started: Project: Test, Configuration: Debug Win32 ——

   1>Compiling…

   1>Test.cpp

   1>c:\users\seth\documents\visual studio 2008\projects\test\test\test.cpp(1) : fatal error C1083: Cannot open include file: ‘QApplication’: No such file or directory

   1>Build log was saved at "file://c:\Users\Seth\Documents\Visual Studio 2008\Projects\Test\Test\Debug\BuildLog.htm"

   1>Test – 1 error(s), 0 warning(s)

   ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

   not really sure what I’m doing wrong.

7. da-crystal
   January 26, 2009 at 15:54

   Hi Seth,

   try to change:

   #include <QApplication>

   #include <QPushButton>

   To:

   #include <QtGui/QApplication>

   #include <QtGui/QPushButton>

   Or you can add Qt-modules-include-path to VC++ Environment. To do so,just repeats the steps for configuring "$(QTDIR)\include" to add the following:

   * $(QTDIR)\include\QtCore

   * $(QTDIR)\include\QtGui

   Hopping this will solve yours.

   Regards,

8. Seth
   January 26, 2009 at 23:57

   Thanks for the quick response, my one error turned into 10…

   it looks like they are all linker errors.

   error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall QApplication::~QApplication(void)" (__imp_??1QApplication@@UAE@XZ) referenced in function _main

   they all look something like this.

   Thanks again for the help.

9. da-crystal
   January 27, 2009 at 08:29

   Thats normal , you just need to specify Qt’s linking libraries(depends on what Qt modules you are using).

   For your earlier code, you need to link to:

   * QtCore4.lib

   * QtGui4.lib

   To do so, from project properties:

   Configuration Properties –> Linker –> Input –> Additional Dependencies –> add "QtCore4.lib QtGui4.lib" to what you have in there

   Anyway, CMake very handy when dealing with Qt configuration specially when using non-default-Qt-modules(other than QtCore & QtGui).

   Regards,

10. da-crystal
    January 27, 2009 at 08:33

    Btw, have a look to the 3rd comment (by suresh) it a very convenience way to configure you Qt projects.

Sorry, comments for this entry are closed at this time.