I want to add pdfreader in my qt application.when searched online I got to know about qtpdf class.
I try to include same in my project. seems I don't have package in my system itself so it don't allows me to run qmake with qpdf includes.
Is there any way to download qpdf module from internet?
I'm running qt community edition 5.10
Any other alternatives to display pdf files are also welcome..
You probably need to add QT += pdf to your qmake project file.
Related
I've been trying to import an open-source project into Qt-Creator to read the code and to learn from it by debuging. Unfortunatly I cannot build imported projects. I found two interessting projects:
https://sourceforge.net/projects/qpass/files/source/
and
https://github.com/keepassx/keepassx
I imported them into Qt Creator by File-->New File or Project-->Import Project-->Import as qmake Project (Limited Functionality). Afterwards I tried to run the project and I got an error:
G:\Qt Projekte\keepassx-2.0.3\src\autotype\test\AutoTypeTest.h:23: Fehler: autotype/AutoTypePlatformPlugin.h: No such file or directory
The file is definitely existing and it's within the project. I googled it and found that there might be problem when importing Qt4 projects into Qt5. Some user recommended to insert 'Qt += widgets' into the pro-File. But it didn't solve my problem.
Does anybody have an idea how to fix it? Is the way how I am importing projects into Qt Creator wrong?
Instead of "New File or Project", you want to use "Open File or Project". Since both projects use cmake, you should be opening their topmost CMakeLists.txt file. I've verified that both of the projects open that way on OS X with Qt/Creator from macports and build successfully using either the default CodeBlocks - Unix Makefiles CMake Generator, or CodeBlocks - Ninja.
Here are the things I had to do to get the builds going:
Add the macports binary path (/opt/local/bin) to the system environment in the project's build settings. That's so that cmake would find ninja. This is optional if you don't use ninja, but ninja speeds up builds by a good integer factors so it's recommended over make.
Add the /opt/local/include path to the INCLUDE_DIR path in QPass's CMakeLists.txt: otherwise it wouldn't find gcrypt's include files from macports. That wouldn't be a problem on most linux distributions, but you'd need a similar fix on windows.
I'm trying to build a Qt Quick Controls application with CMake. I use the following documentation:
http://doc.qt.io/QtQuickCompiler/qquickcompiler-building-with-cmake.html
When running CMake, I'm getting this error:
By not providing "FindQt5QuickCompiler.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided by
"Qt5QuickCompiler", but CMake did not find one.
Could not find a package configuration file provided by "Qt5QuickCompiler"
with any of the following names:
Qt5QuickCompilerConfig.cmake
qt5quickcompiler-config.cmake
at this line:
FIND_PACKAGE(Qt5QuickCompiler)
Obviously CMake doesn't find Qt5QuickCompiler. I checked in my Qt folder (C:\Qt) but it's not there. Yet I could run this application with QMake.
What do I need to set in order to find Qt5QuickCompiler?
I just stumbled upon the same issue with Qt 5.12 under Linux. The documentation under https://doc.qt.io/QtQuickCompiler/qquickcompiler-building-with-cmake.html currently seems to be wrong.
Use QuickCompiler after COMPONENTS in the Qt5 find_package instead of trying to add it via find_package(Qt5QuickCompiler). Adapting the example from the link, use
find_package(Qt5 COMPONENTS Quick Core Network QuickCompiler)
qtquick_compiler_add_resources(RESOURCES example.qrc)
add_executable(myapp ${SRC_LIST} ${RESOURCES)
instead of
find_package(Qt5 COMPONENTS Quick Core Network)
find_package(Qt5QuickCompiler)
qtquick_compiler_add_resources(RESOURCES example.qrc)
add_executable(myapp ${SRC_LIST} ${RESOURCES)
The error is pretty clear: CMake doesn't have a module for the Qt5QuickCompiler to find it. It just doesn't know what it is. I've just checked the corresponding cmake folder and it doesn't have that file. I'm not sure what that Qt documentation page is talking about but there is no such a file in the CMake distribution. Maybe Qt sources have this file somewhere?
You need to build Qt5 with Qt Quick compiler which you can download from http://www.qt.io/qt-quick/. In the build directory of Qt Quick compiler, you will find Qt5QuickCompilerConfig.cmake.
Copy the path to this directory, and add to CMAKE_PREFIX_PATH like this
cmake -DCMAKE_PRFEIX_PATH=<pathToFile> <pathToSrcDirOfYourProject>
I want to create an installer for my Application. So, I have read about Qt Installer Framework and I tested the tutorial example and create the installer and everything work find with the example. But I have a doubt when I try to do the same process for my Application. When I compile the code a folder is created at the same level of my code:
MyApplication (my code)
build-MyApplication-Desktop_Qt_5_4_1_MinGW_32bit-Release (code compiled)
So my questions are:
What files of the compilation do I need to copy into the folder myinstaller/packages/vendor/ recommended by Qt Intaller Framework?
If I have dependencies of Qt like serialport, multimedia, and others, how do I insert these dependecies with Qt Installer Framework?
windeployqt.exe is what you want. Just run that on the command line and give it your executable as the argument. It will automatically copy in all the required Qt libraries and even provide the runtime redistributable installer. Then you can use the binarycreator to generate an installer.
You can put all the dependencies in myinstaller/packages/vendor/data, along with your exe. and eventual additional files. I recommended using i.e. dependency walker for finding all the required dependencies. Some of the binarycreator tutorials on qt are outdated; make sure you use the command
<location-of-ifw>\binarycreator.exe -t <location-of-ifw>\installerbase.exe -p <package_directory> -c <config_directory>\<config_file> <installer_name>
with the appropriate arguments.
I have a prebuilt version of netcdf Library which I've downloaded from the Unidata website,
Now I am trying to link this Library to Qt 5, to use it in my Qt project. So I looked for some solutions in the internet and I found that I should add these lines to my Project.pro :
LIBS += -LC:/netcdf/lib -lnetcdf
INCLUDEPATH += C:/netcdf/include
But after runing the project, it doesn't work, so I rerun it with the debuger and it shows me this Message Box (titled "executable Failed") : During startup program exited with code 0xc0000135
Please help !
The pre-built libraries are built using Microsoft Visual Studio. As I recall, the C/C++ compiler the Qt SDK uses on Windows is a mingw-variant of gcc. I am not certain if the pre-built netcdf libraries are compatible with the mingw runtime, but it is usually not a good idea to mix C runtimes anyways.
I'm assuming you are using Qt Creator; if so, then it may be easier than you think to compile the netcdf-c libraries yourself. Because the netcdf-c project uses CMake, you will be able to open it as a project in Qt Creator.
Prerequisites
You will need the following:
cmake: http://cmake.org
netcdf-c source code: http://github.com/Unidata/netcdf-c/releases
NetCDF Dependencies
Note that you will need to install the following dependencies first, depending on the functionality you want from the netcdf library.
NetCDF4 support requires libhdf5 and libhdf5_hl, both provided by the hdf5 package available from http://www.hdfgroup.org.
DAP support requires libcurl. Google should be able to help you find this.
If you do not need these capabilities, you'll be fine with a straight netcdf-classic install.
Opening netcdf-c as a project in Qt Creator
Launch Qt Creator
Go to file->open project
Navigate to the netcdf-c source directory and open the CMakeLists.txt file.
This will load the netcdf source as a new project in Qt Creator. At this point it should be pretty straight forward to compile netcdf and install it somewhere on your system to use with your project.
Incorrect Assumption
If my assumption that you are using Qt Creator is wrong, this is all still possible from the command line; it will be, however, a little more involved.
I just started to use Qt today and I don't know if I did something wrong when I installed it but I can't use QFormBuilder.
Linux Xubuntu 64b
what I did:
I clone this repo : git#gitorious.org:qt/qt5.git
init_repository >> ./configure >> make >> sudo make install
I downloaded qt-creator http://qt-project.org/downloads#qt-creator
I created a new project and when I try to include QFormBuilder he tell me that he doesn't know this file.
So, I saw somewhere someone who says that I need to add QT += uitools to the project file, but now when I try to use qmake, I am getting Unknown module(s) in QT: uitools.
Sorry for my english and thank you for your help.
If you get
Project ERROR: Unknown module(s) in QT: designer
you are missing qttools5-dev package.
To add to the answer by #svlasov, on RHEL or CentOS based systems (7.x or 8.x, etc.) you need to install:
yum install qt5-qttools-devel
Depending on the project you are building, you may also need to install qt5-qttools-static.
Have you actually read the documentation?
It writes this at the beginning:
The QFormBuilder class is used to dynamically construct user interfaces from UI files at run-time. More...
Header: #include
qmake: QT += designer
Inherits: QAbstractFormBuilder.
So, just follow that and put this into your qmake project file:
QT += designer
or you can invoke qmake like this:
qmake QT += designer
Of course, you need to make sure that you have the designer installed properly for this. You will need to install a package like libqt5designer5 on your Ubuntu, or if you had installed Qt manually, you will need to install the designer manually as well.
I am not that familiar with Ubuntu. You may need to install some corresponding development package as well. Either way, the point is that the library and headers need to be installed properly on your system which you seem to lack when getting Project ERROR: Unknown module(s) in QT: designer after either of the aforementioned solutions.
Read the documentation, it says to add the designer module to the .pro file:
QT += designer