This must be a very common issue, but I need to download Qt because I am going to learn OpenCV in C++. When I go to Qt-project, there were lot of links, even there are lot of links for the same windows platform! Currently I am coding in C++ with MS Visual Studio Express 2010 (Yes, I am using windows 7 ultimate). I am new to C++ as well.
In order to do OpenCV in Qt, what should I download? My book is using a Qt IDE as well. Can you provide direct links please? Please help!
When using QT there is a IDE named QT Creator. This gives the option of creating various type of projects such as plain C and Plain c++ projects and many more. So you may not need any other c++ IDE as MSVS express. Download the QT SDK to get all the libraries and the IDE together.
For example for windows download the exe in named as "Qt libraries 5.0 Beta 2 for Windows (501MB)"
If you are going to use OpenCV with QT i recommend OpenCV tutorial 4: OpenCV and Qt on youtube.
you can download qt as many ways.
1.as the complete SDK. (you must purchase this)
2.get the qt libraries
3.download the source and build it. (little hard and take a lit of time)
im sure you will go with the 2nd option. so you can download Qt libraries 4.8.4 for Windows (minGW 4.4, 317 MB) or Qt libraries 4.8.4 for Windows (VS 2010, 234 MB). 1st one is for mingw compiler and the other one is for vc 2010 compiler. you can download this one because already you have vc compiler installed. note that applications build with vc++ are not cross platform. if you need your applications to be cross platform go with mingw compiler. (prebuilt mingw librarys are only compatible with mingw 4.4 version. if you are going to download this first install mingw 4.4 in your computer)
then download and install Qt Creator 2.6.0 for Windows (51 MB). this is a cool IDE for using qt, c++.
Related
I am building a GUI application in which I have to use Visual Studio 2010 build tools. I was told that the correct qt version to use with this VS version is 4.8. I've downloaded Qt 4.8.0 using this link:
https://download.qt.io/archive/qt/4.8/4.8.0/
And I made this version the default in the VS Qt options menu. However, when I try to create a new visual studio project, all of the module options are greyed out.
Which in turn makes it impossible to create the project because upon clicking "next", the "Finish" button is also greyed out. Any Idea of what's going on??
With pre-compiled binaries (that is, you don't have to compile qt yourself) you can use Qt 5.5.1 with VS2010 that you can get from here.
After that, i would create a simple project using qmake and specifying
TEMPLATE = VCAPP
that will tell the qmake (see docs) to generate a .vcprojx file that you can use from VS2010.
Latest Qt version that supports VS2010 is 5.6.3 IIRC, however mind you that even that version is now EOL. (March 2019).
You should try to upgrade to 5.9 or 5.12 (however i am not sure that VS2010 will be able to support those since they rely pretty heavily on c++11 that VS2010 supported very lightly)
P.S. If you'r stuck with Qt4 then greatest version is 4.8.7 (VS2010 supported) that you could get from here
Hi I have updated visual studio to 2015 version and I have Qt msvc2013. Qt says that no compilers can make code for this version of Qt, (Qt detected compilers from visual studio). How can I make it working without installing VS2013?
You cannot mix C++ compiled with different major versions of the Microsoft Visual C++ compilers. So you need to either get a version of Qt for Visual Studio 2015, or compile your own one.
At this time, there is not yet an official build of Qt for Visual Studio 2015 available (this is planned for Qt 5.5.1 5.6.0). If you want to try compiling yourself, https://wiki.qt.io/Building_Qt_5_from_Git is a comprehensive guide. You should try either the 5.5 branch (if you get the Qt sources from git), or the 5.5.0 source packages. You should be able to get help e.g. on the qt-interest mailing list.
Adding a new mkspec is pretty simple, just copy the win32-msvc2013 and rename it to win32-msvc2015, then modify and use that one.
Second thing to do is not try to link against 2013 built libraries. If 2015 follows the same pattern as the older one, mixing libraries from different VS version is not possible.
Last thing, before adding icu, OpenSSL and MySQL you rather try to build Qt with the default parameters.
Qt's current development version is 5.6.
It is in beta and there are prebuild binaries for msvc2015.
Link to Qt Development Binaries
I am new to C++ and have been working with MS VISUAL STUDIO 2010 Express. However, I am in need to shift to Qt as my university recommends. Unfortunately, the qt.nokia.com is redirecting to another site http://qt.digia.com/.
Since everything in that site is not free, I found the following link called "Qt Open Source Version". Is this is the site to download Qt?
When I go there, I can see various options, which means number of downloads. I have windows 7 ultimate and got visual studio 2010 express installed in my machine. But, this site got number of windows downloads. I prefer the one which claims to come with the Qt IDE (Qt Creator??). If you need further more information, I will be using this Qt GUI C++ applications with OpenCV.
I have already installed OpenCV and it works with VS so if you can, please tell me how to set it up with Qt as well.
Please help me to download the correct version of Qt. Thanks
Answering to these kind of question is always hard and dangerous!
I know you had experiences with VS but
I'm going to offer you to choose MinGW instead.
Download link
qt-project is the correct place to get open source Qt.
There are prebuilt binaries of Qt 5.0 for VS2012, but if you want to use Qt 4.8 with VS2012 you'll need to compile it yourself, as there are no prebuilt binaries for VS2012 (yet?). Compiling Qt is not difficult, just open command prompt for VS2012, run configure --help to find out how you can customize your Qt build. Then run configure with appropriate parameters, then nmake.
If you decide to use Qt Creator as an IDE you are welcome to do it - Qt Creator can compile projects using different compilers, including VS2012 compiler. But in order to debug projects compiled with VS2012 compiler you'll either need to use VS2012 or install Debugging Tools for Windows (which Qt Creator will find and use to debug VS2012-generated executables).
http://qt-project.org/downloads
Qt 5.0
Select the file according to your operating system from the list below to get the latest Qt 5.0 for your computer. The binary packages include Qt 5.0.2 libraries and Qt Creator 2.7.0
Qt 5.0.2 for Windows 32-bit (VS 2010, 485 MB)
after finding that its too hard to write GUI applications with WIN32API today im going to learn Qt. so I installed qt as follows.
first I installed VS 2010 express. its OK.
then downloaded Qt libraries 4.8.3 for Windows (VS 2010, 235 MB) from http://qt-project.org/downloads and installed it as a normal software. (in C:\Qt\4.8.3) it automatically installed assistant, designer ... ect.
then downloaded Qt Creator 2.6.0 for Windows (51 MB) from http://qt-project.org/downloads and installed it also as a normal program.
now in qt creater when I try to creat a Qt project it says that no valide kits found.
here are some screenshots of the issue im facing.
what should I do now to start qt. please I need someones help to procced.
You don't need QtCreator AND visual studio.
QtCreator is Qt's own IDE and uses g++/mingw as the compiler (included in the download).
Qt includes QtDesigner - the graphical UI designer that you can use with visual studio or QtCreator.
If you want to use VS, install the qt-vs-addin and download the VS builds of the Qt libs.
If you want to use QtCreator, download the mingw builds of Qt.
Or in both cases you can download the source and build it from scratch using wither QtCreator or VS.
edit: You can make QtCreator use the VS compiler backend - in which case you should download the VS build of Qt. Personally I have never done this - if you are using VS then you may as well use the VS ide.
edit2: The free express version of VS can't use plugins - so its a bit of pain to use with Qt. In this case you should probably use QtCreator.
On my computer (Win7 32, VS2010 Ultimate) I would like to use Qt Creator and Qt Visual Studio add in, both LGPL versions.
There are minGW and VS2008 versions of Qt frameworks on the Nokia websites, I did not find VS 2010 version.
So I have installed Qt 2010.05 SDK and in the VS 2010 Command prompt the following steps have been performed:
configure -static
nmake sub-src
I checked Qt Creator and it successfully runs. After the translation has been finished I installed VS 2010 add I tried to add new Qt version int the path
C:\Qt\2010.05\qt
But the following error message has been appeared:
Qt in the given path was built using minGW
It do not understand why because the translation has been performed for the VS2010.
Where is the error? How to install it correctly?
I found out from a German Qt forum that, VS add-in looks for libqtmain.a and libqtmaind.a files to determine if it is built with MinGW. Guess what? Qt ships with those files.
Delete them, and you will be fine.
FWIW, The Vs2008 version works fine with VS2010. I didn't need to build it or anything. You can install that and then just run the latest version of the VS plug-in installer and you should see the Qt menu options in VS2010.
AFAIR your command line is incomplete: I remember one had to specify the build platform. It could be that it's using mingw to build Qt since you didn't specify the VS version in the parameters. The following post might be of interest to you: Building Qt 4.5 with Visual C++ 2010