Since I'm using SCons instead of qmake, I have no project (.pro) file, and for this reason Qt Creator (I use it only to make GUI) refuses to connect signals to slots. I'd like to manually edit .ui file to add appropriate connections. What should I change?
Use uic to compile the ui file as Karlson said. For example:
uic yourinterface.ui -o uicompiled.h
This way you can generate complete class from the ui files and than you can just plug them into your codebase
qmake will convert the .ui file into .pro and then to a make file. But you still need to run uic to compile your .ui files to generate the meta objects to allow the Signal-Slot connection to occur. Also headers for class definitions might be helpful.
Normally when you subclass the ui you will connect the signals using connect functions to custom defined slots within the subclassed class.
Related
I have a QML, OpenCV application on qt5 which uses qmake and has a .pro file. I want to add publishers/subscribers to my qt project to publish video stream and instructions etc. I tried to use catkin_create_qt_pkg command to create a template and transfer my project to the template but there were numerous problems which made me question my approach. The ros-qt template uses Cmakelist and .ui instead of qml. So, I will need to change some things to integrate them.
First, is it possible to use ros with qmake and .pro instead of cmake. It would be easier to add just ros publishers and listeners to my existing application than changing the entire QML application. If not, how do I convert qmake and .pro to cmake and Cmakelist.txt (assuming that I can use QML with ros). Also, although it doesn't sound well, is it possible to use .pro for qt and Cmakelist.txt for ros in the same package?
Second, is it safe to use qt5 and qml with ros? The ros_qt app template uses qt4, not qt5. Here is the app template.
I want to create a shared library to communicate with database. I want to use Pimple idea in my implementation, but I don't know which header files must be added to program so that Qt can find Q_DECLARE_PRIVATE and some other macros.
Is it necessary to add some command to .pro file?
I have started to develop an app using Qt Creator, and I am dealing with signals and slots. The problem I have is that I have no way to figure out how to view the code generated from my .ui file I am building. I want to edit some signals and slots but I can't do more than the GUI stuff. Is there a way to view all the source code that is generated when I build my .ui file in creator, or do I have to use another part of the Qt suite?
The .ui file is fed to uic to generate .ui.h file. You should be including that file in your code. Place the cursor over the name of the include file within the #include "foo.ui.h" line, and press F2 to see the contents of the file.
There is no other output from a .ui file. "Qt", specifically the Makefile for your project, doesn't generate anything besides a .ui.h file.
I am recently new to Qt but I have to understand and modify a huge Qt project by someone else.
Is it possible to check the signal slot connection relationship from the source code without finding all the corresponding connect() function?
I heard that the MOC file stores this information somewhere, but I cannot find them out.
If you are looking only for MOC file then you can find it in debug directory. This Directory will be created at same location where your project is located. You need to compiles your code in Qt creator.
Look into the build directory, for every header file that have a class that inherit QObject, moc will generate a cpp file that has a moc_* prefix.
Ex.: ClassA.h -> moc_ClassA.cpp
According to the Qt wiki, both definitions seem very similar to me..
The rcc resource compiler parses the XML and generates C/C++ code
The uic reads an XML format user interface definition (.ui) file as generated by Qt Designer and creates a corresponding C++ header file
So they each take an xml file and make it into c++. So what's the difference that you would use one over the other?
(Incidentally I'm looking to use pyQt with QT Designer (&pyrcc4?) to make a simple GUI for an existing DLL)
Thanks!
rcc is a Qt resource compiler: the Qt resource system is a platform-independent mechanism for storing binary files in the application's executable.
uic is Qt user interface compiler: it creates a corresponding C++ header file from ui file generated in Qt Designer