I am getting started with qt and especially qt quick now and wanted to do the example from here: https://doc.qt.io/qt-5/qtquick3d-simple-example.html
However already the line import QtQuick3D 1.15 has been giving me headaches. The error that is printed says QML Module not found (QtQuick3D). If I am trying to import other things, I get the corresponding errors.
The error message also tells me "for qmake projects use the QML_IMPORT_PATH variable to add import paths" however I don't know what path and how I should set this?
Another solution I have seen is the one suggested here: https://stackoverflow.com/a/64952178/13533641.
Again I am unsure which path to add here. I tried "/usr/lib/qt5/bin" and "/home/Qt/5.15.2/gcc_64/bin". After setting the value I restarted Qt Creator but the error remained.
The project I have been using is an empty QT Quick application which you get if you create a new project. I just added that one import line.
I have used the Mainainance Tools to check the plugins and I installed something that was named 3D. I am unsure if this is the "normal" qtwidget thing or the one I am trying to use in the code. (Or maybe there is no difference anyway, who knows)
I use qt version 5.15 right now but I also tried installing the 5.9 and 6. Everywhere I have the same problem.
My machine runs ubuntu 20.04 and I installed qt using the official download for linux.
If I am correct, it got installed in the directory /home/Qt.
Does anybody know how to solve this?
After trying different paths and versions of Qt, I found this this instruction here
However I only needed to follow until the picture of the mainaintance tool and not the building afterwards. Before I had already added the additional library for Qt3d. This enough wasn't enough apparently, after adding the Qt-shader tools it and conan it worked however.
I did this after yet another fresh installation of Qt (this time version 6) and it worked now.
Regarding the suggested change for the qml emulation layer: the path that is now set is /home/Qt/5.15.2/gcc_64/bin.
Hope this helps someone in the future!
Related
I have newly installed Qt and when I tried to open my projects and have not even tried to compile, I got this mysterious cannot find feature windows_vulkan.
My QT has been working earlier but I had to reinstall it because it complained I had missing libicuun65.dll and libicuuc65.dll and recommended reinstallation. I have removed everything and installed qt from scratch.
Below is my error
I went into the directory it specified and clearly see the file. I am just not sure the content of the file is complete as it only contains 2 lines below:
load(windows_vulkan_sdk)
QMAKE_LIBS_VULKAN =
Maybe there are lib that are missing like libicuun65.dll and libicuuc65.dll and/or others?
Also, please note the uncompleted "Prepare C++ code Model" status bar. It has never completed as I saw it there for hours...it should not take that long.
What should I do to rectify this issue? Please help.
Update: My paths are set up too...
I think I understand why this happens for you, you install your Qt in Drive D but install Vulkan SDK in Drive C.
These should be on the same Drive.
Maybe Qt can't find your Vulkan SDK because of that please reinstall Vulkan SDK in Drive D.
another thing is this link in bugreports.qt.io
and also this GitHub issue.
They have problems like you and their compiler was MSYS2.
In
\msys64\mingw32\qt5-static\share\qt5\mkspecs\common\windows-vulkan.conf
changed:
From: load(windows_vulkan_sdk)
To: load(win32/windows_vulkan_sdk)
Qt6 supports importing QML modules without specifying the version number.
Example:
Qt5: import QtQuick 2.0
Qt6: import QtQuick
where Qt6 will just choose the newest version of the module.
My problem is, that the current version of qtcreator does not seem to know about this feature (or any Qt6 features, most likely). I get the following error:
Opening the Designer with this error present, results in an error message telling me, that the QML code is broken. Running the project works flawlessly. I work on Arch Linux and installed the whole qt6 group as well as pyside6 and the install was successful. I tried to add Qt6 functionality by choosing /usr/bin/qmake-qt6 under Tools > Options > Kits > Qt Versions > Add, but this did not change anything, which does not seem surprising to me, but I thought I would try.
Is anyone else facing this problem? Have I overseen something? Can I maybe select another QML linter in an option I did not see?
Any help will be very much appreciated, I will continue to work with hardcoded version numbers for now, but I really like this new feature.
Following advice on a question I asked previously, I am trying to use Box2D with my QML app.
I have downloaded Box2D for QML here: https://github.com/qml-box2d/qml-box2d
I have followed the instructions :
Extracted the files to my Import folder (Qt/5.4/android_armv7/imports/)
Opened Box2D.pro in Qt and built it.
The libBox2D.so file was created as per the instructions I was following.
I have tried using Box2D in my QML project. First with my android app, then with a desktop app.
On each occasion I am getting an error:
module "Box2D" is not installed
I'm stuck with this, can someone help me?
You need to run make install (nmake install on Windows) so that the Box2D files are installed to e.g. Qt/5.4/android_armv7/qml, in your case. To use nmake, you need to have your development environment set up correctly. This is explained here, although that's specifically aimed at building Qt itself. If you're using MSVC, it is enough to open MSVC's developer command prompt and run nmake from there.
I am currently using QtCreator 2.4.1 with Qt 4.7.4 development libraries (in Ubuntu) and am trying to track down a bug which after profiling with valgrind seems to occur internally within QGraphicsView::paintEvent(…) method
To help isolate this problem I would like to step into the Qt sources. Having done some searching through both the Qt forums and stack overflow and have not being able to find a way to integrate the sources with my version of QtCreator.
I have currently tried downloading the sources via the QtSDK manager and adding a “Source Path Mapping” within Tools->Options->Debugger. I am sure that this step is where I am making a mistake as I am unable to even switch to source when viewing internal Qt header files i.e. from QGraphicsView.h
I have so far tried adding the following Source Path Mappings
Source Path=/var/tmp/qt-src
TargetPath=/home/paul/QtSDK/QtSources/4.7.4
and
Source Path=/var/tmp/qt-src
TargetPath=/home/paul/QtSDK/QtSources/4.7.4/src
Neither works.
I have also tried building Qt directly from source, adding this to my "Qt versions" list within Qt Creator and creating a new project configuration using this version. This also did not work.
Likewise I have tried adding the src folders to my gdbinit file. This also fails to work.
I am completely lost with this.
Paul
Someone asked a similar question here: Need to step into Qt sources (my IDE is Qt Creator).
Someone else asked about Valgrind errors with Qt here: Suppression files for Qt memory leaks with Valgrind
And here is a little more info about Using Valgrind with Qt Creator along with some explanation about how to read the results. Its a little dated from late 2010.
Related Suggestions
I wouldn't debug the QGraphicsView class just because of all the effort to make it work or find the problem might be for nothing... Qt is moving to using the SceneGraph as the backend for QML and the rendering engine for QGraphicsView might become obsolete.
Updating to the latest stable build of the Qt libraries may make a big difference for QGraphicsView.
If you post the valgrind error you are getting to the Qt Trolls, someone might be able to explain what is going on for you.
There are other debugging techniques besides the traditional debugger. I've been programming in Qt in Windows (without valgrind) and with a large multi-threaded application, that loads a bunch of Dll's. I've had to put some faith into the Object Tree Model clean up and work on all the new calls I put in. Most of the time I just use QDebug to find errors. Then I am also using a combination of qInstallMessageHandler() with QDebug to implement decent logging for the hard to track bugs.
See also Qt Debugging Techniques.
I have downloaded QT SDK LGLP (Creator + libraries) 4.6 and I am having problems compiling projects. After install I have added C:\Qt\2010.02\qt;C:\Qt\2010.02\qt\bin to PATH and added QTDIR env varaible containing C:\Qt\2010.02\qt, the I run "configure -platform win32-g++" to compile it. Everything went good.
I the tried to use QT Creator to create and compile a project.
The problem is everytime I try to compile I get the following error message:
No valid Qt version set. Set one in Tools/Options
Error while building project GUITest
When executing build step 'QMake'
Canceled build.
When I go to Tools/Options the manual version is set to v4.6.2, Location c:\qt\2010.02\qt\bin\qmake.exe. The auto detected version is set to even though I have added the dirs in Path. Is there something I am doing wrong here? Has anyone encountered this problem in Vista.
I have been working on this for 2 days, change configurations, reinstalled etc...
The QtDir value is compiled into the
qmake-binary. You can only change this
by recompiling qmake and passing on a
different value to qt-configure (I'm
not sure which setting or variable is
passed on to qmake) When using
precompiled, downloaded binaries,
you'll have to keep the QtDir at
c:\Qt\4.6.2
EDIT:
What I said was incorrect. The locations of qmake, moc,... are located in the file:
<Qt>/4.x.x/.qmake.cache
Try uninstalling/reinstalling qt creator
But i highly suspect you didnt compile qt properly as this problem seems really odd. I had alot of problems compiling so i know myself from the past mistakes.
Make sure you carefully reread install instructions for your environment, also if you have visual studio you need to follow procedure to install it in compliance with it. Same if you use another c compiler
If nothing goes right, the easiest way to install qt imo is directy from their git hub, chec installin qt from git, on their git site there is wiki that explains how to do it
its really easy and after that all you need to do is add the qt to creator
Hey, it QT emulators have lot of problems in vista, i have tried several times,it didnt work for me.. it works well with windows XP. though ill tell you in brief what you need to do
1)install latest perl
2)install carbide c++ editor
3)install Qt SDK
4)install s60 or N97 emulators
make sure that except perl all the items which are mentioned above will be in same drive,and also
make sure that folder names which you give while installation should not have spaces at all..
i.e suppose if you are going to place any of the above items in a folder whose name is having spaces it will not work.
if you have any doubts feel free to ask.