I'm trying to find out where the WebView widget in QtDesigner is. I've installed it (QtDesigner 5.11.1) on OSX Catalina and Win 10. I've installed XCode/C++ libraries along with the open-source QTCreator (all options). I still can't find it.
QWebView unfortunately is not part of the official Qt installers since Qt 5.6, because it has been obsoleted by QWebEngineView (https://doc.qt.io/qt-5/qwebengineview.html).
Several 3rdparty Qt installers (like most of the Linux distributions, msys2 on Windows) still ship the QWebView module as well. This leaves you with 2 options: either migrating to QWebEngineView, or installing Qt from one of these 3rdparty installers.
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The Problem
I cannot stress this enough but I have looked as far as I can over the internet for a solution and either they didn't have a solution or all they did was add a support ticket. The problem is that after creating a python qt quick application I try opening the QML file but when I go to the design tab it give me this error:
Code
The Designer is very finicky and can crash for various reasons. I've had success seeing the actual errors causing this dialog by launching Creator from the command line with debugging enabled:
QT_LOGGING_RULES="qtc.nodeinstances.init.debug=true" "/Applications/QtCommercial/Qt Creator.app/Contents/MacOS/Qt Creator"
That's specific to macOS but the like approach should work on any OS.
Look for error messages related to "Puppet". That's the name of the subprocess that actually renders the QML for Designer.
You can also go to Preferences -> Qt Quick -> QML Emulation Layer and try the opposite of the current setting and see if it works any better.
The solution that works for me is as follows:
OS: windows 10
Go to Tools >> Options >> Qt Quick >> (tab) Qt Designer
In the "Use fallback QML emulation layer", you see the placeholder path there. Switch it to C:\Qt\Tools\QtDesignStudio\bin or use browse if you have a different install location for Qt such that path\to\QtDesignStudio\bin
Boy do I have a FIX for you guys. I had been screwing around with this same issue to no avail, until I came across an error that wouldn't let me download qt3d (something) and I know that was part of the installation choices so I decided to uninstall everything. A thing to note when uninstalling: the Maintenance Tool doesn't uninstall everything. There were still Qt files located in C:\Users\user\AppData\Roaming I needed to delete those. Also, I needed to go into the Registry Run >>> Regedit >>>> Edit >>> Find >>> then search for Qt and that brought up all of the QT keys that still remained. I just deleted them one by one. For the Reinstall I practically installed everything (within reason) here's the list of my installation selections. Happy Hunting Fellow Qt'errr's!
Qt 5.15.2
Web Assembly
MSVC 2015-64BIT
MSVC2019-32BIT
MSVC2019-64BIT
MinGW 8.1.0 32BIT
MinGW 8.1.0 64BIT
UWP ARMv7 (MSVC 2015)
UWP x64 (MSVC 2015)
UWP ARMv7 (MSVC 2019)
UWP x64 (MSVC 2019)
UWP x86 (MSVC 2019)
Android
SOURCES
Developer and Designer Tools
Qt Creator 4.15.1 CDB Debugger Support
Debugging Tools for Windows
Qt Creator 4.15.1 Debug Symbols
Qt Creator 4.15.1 Plugin Development
Qt 3D Studio 2.8.0
-MinGW 8.1.0 32BIT
MinGW 8.1.0 64BIT
Qt 3D Studio OpenGL Runtime 2.8.0
MinGW 7.3.0 64Bit
Qt Installer Framework 4.1
Cmake 3.19.2 32bit
Cmake 3.19.2 64bit
Ninja
License: I chose L GPL
I chose Cmake not qmake
Graphic drivers were the issue in my case. Try updating or changing them.
Maybe that your Direct3D driver seems to have issues with Qt.
The error can be avoided by defining:QT_OPENGL=software in the Windows environment.
Assuming the root cause is the display driver of your computer.
Please reference:
https://bugreports.qt.io/browse/QTCREATORBUG-23455
Qt 5.11. Mac OS X.
I'm trying to write automatic build script for Jenkins. Target platform: Android armv7.
androiddeployqt says me that it cannot find ant in PATH.
Yes, I did not install Ant.
But, it works somehow with Qt Creator. Qt Creator can build APK. Why so? It uses the same androiddeployqt, doesn't?
Do I really need to install ant (while Qt Creator does not need it)?
Qt Creator uses undocumented --gradle option. Add it to your command.
I have built a static x86 Qt5.5 library with VS2013 using:
configure -static -prefix D:\Qt\qt-5.5.0-x86-static -opensource -release -static-runtime -nomake examples -no-compile-examples -static-runtime -nomake tools -no-iconv -qt-zlib -skip qtwebkit -confirm-license -qmake -opengl desktop -no-angle -nomake tests -target xp
After that I used this static library build a static-link exe of my Qml App. It can run everywhere in my windows which has been installed Qt5.5.
Then I used VMware Workstation to install a pure Windows XP SP3 only installed VC2008 runtime not VC2013 runtime.
Firstly, I copy the exe into this XP. It can run but had nothing to show. I need kill it in taskmgr.
Second, I copy all folders in D:\Qt\qt-5.5.0-x86-static\qml to the root dir of my exe, it can run. But it shows me only a blank window with correct window title.
I think I have listen all the advise in Deploying Qt 5 App on Windows. But why the qml parts cannot be compiled into static library? How can I let my app not show blank?
P.S. Even if I use windeployqt to deploy share-link library version of app. It also shows me blank window. But it can run on Windows 7.
The output of qtdiag on my virtual XP:
Qt 5.5.0 (i386-little_endian-ilp32 static release build; by MSVC 2013)
on "windo ws" OS: Windows XP [winnt version 5.1.2600]
Architecture: i386; features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2
Library info: PrefixPath: D:\Qt\qt-5.5.0-x86-static
DocumentationPath: D:\Qt\qt-5.5.0-x86-static\doc HeadersPath:
D:\Qt\qt-5.5.0-x86-static\include LibrariesPath:
D:\Qt\qt-5.5.0-x86-static\lib LibraryExecutablesPath:
D:\Qt\qt-5.5.0-x86-static\bin BinariesPath:
D:\Qt\qt-5.5.0-x86-static\bin PluginsPath:
D:\Qt\qt-5.5.0-x86-static\plugins ImportsPath:
D:\Qt\qt-5.5.0-x86-static\imports Qml2ImportsPath:
D:\Qt\qt-5.5.0-x86-static\qml ArchDataPath:
D:\Qt\qt-5.5.0-x86-static DataPath: D:\Qt\qt-5.5.0-x86-static
TranslationsPath: D:\Qt\qt-5.5.0-x86-static\translations
ExamplesPath: D:\Qt\qt-5.5.0-x86-static\examples TestsPath:
D:\Qt\qt-5.5.0-x86-static\tests SettingsPath:
Standard paths [... denote writable entry]: DesktopLocation:
"Desktop" *C:\Documents and Settings\Administrator\
The final conclusion:
The problem is the graphic driver in my virtual Windows XP. It can run on other real PCs.
But there is a sad problem to static build of QML.
I have found this:
https://forum.qt.io/topic/22035/qml-apps-not-runnable-using-static-build-up-to-qt-5-0-1-release/24
The reason why I need copy such folders Qt QtQuick.2 QtQuick is that those lib cannot be compile-loaded. Even if I add them into .pro file. From Qt 5.0 to Qt 5.5. The official side seems do not like people use QML by static-link. So, it is waste of time to do static build of QML app.
Qt Quick applications need 3d acceleration in order to work. This is based on either OpenGL, DirectX via Angle or some kind of software renderer that comes with the commercial version of Qt. Since you specifically exclude Angle in your config, you need a proper OpenGL driver. Make sure that OpenGL works on your machine. You'll find tools for that.
I don't think that is has something to do with missing C++ standard libraries (VC2013 runtime), because in this case your application would crash during start and not run. Qt Quick graphic issues however often lead to a running black app that is writing warnings to the console.
Further debugging can be done using the qtdiag.exe command line tool that comes with Qt (It comes with the online installer. I don't know where it is when you build from source). It checks for you which graphic driver is used and often can show error messages.
I'm attempting to use Qt creator to cross-compile a project, but have an issue matching the Qt version and my specified compiler toolchain.
I have created a Kit setting up a Device, selecting my toolchain as the compiler (GCC ARM Linux in this case), but I only have a locally installed system Qt (5.0.2 on Mint x86).
Qt Creator understandably tells me the compiler cannot produce code for the Qt version; all the guides I have found suggest using a Qt compiled for the target platform. This doesn't make sense though - it attempts to run qmake compiled for a different architecture and fails
How do I install or configure/compile a Qt version to work with the cross compiler? Maybe I can modify my existing one to understand this setup?
Thanks
This makes absolutely sense. The advice to use a Qt, which is compiled for your target platform is correct. But this does not mean that you use a Qt that was compiled natively on that target platform. You need to use a Qt, which was compiled with a special cross compiler on your host platform for your target platform. This way qmake and other build tools remain executable on your host, but create configurations for your target.
So, if you have a compiler, which can create ARM code, use it to build your Qt. Then you can create a kit in QtCreator out of this compiler/Qt pair.
Greenflow is right. I would like to add some information. I have cross compiled Qt 5.4.1 on Windows having an ARM Linux as target platform. You just need to configure the build properly. Here's what I did:
./configure -platform win32-g++ -xplatform linux-arm-gnueabihf-g++ .....
So Qt tools (qmake,moc,etc...) were built as Windows binaries and all the libraries were built as Linux binaries. Check for the available platforms in qtbase/mkspecs.
I have some difficulties with QT, which I need for school for some GUI applications.
I have recently done these steps:
1) mingw-get-inst-20120426.exefrom SourceForge installed to C:\MinGW\ with default settings.
2) Qt libraries 4.8.4 for Windows (minGW 4.4, 317 MB) from QT Project installed to C:\Qt\ with default settings. Here an error occurs:
!!!There is a problem with your MinQW instalation
!!!g++ not found in c:\MinGW\bin\
!!!Do you still want to continue? Yes
I checked c:\MinGW\bin\ there is no such file
3) Qt Creator 2.6.0 for Windows (51 MB)also from QT installed to C:\Qt\gtcreator-2.6.0 with default settings
4) Run the QT IDE
5) Open project or create new project. Another error occurs here
!!!No valid kits fond.
Qt Creator uses the invalid kit Desktop to parse the project.
6) Open Options->Build & Run->Kits (But I don't know how should I set Kits and where to find them).
7) Can you also help me, how to set Qt version
(Options->Buid&Run->Qt Version)? Where do I find qmake.exe?
I also didn't find how to create GUI Application. There is no such option in New File or Project...
Thanks for help.
That is quite tricky ;)
Precompiled Qt (MinGW) is only win32 (not win64).
Precompiled Qt is compiled with MinGW-g++ 4.4 and won't work with other.
You have to download this one:
http://get.qt.nokia.com/misc/MinGW-gcc440_1.zip
//// Edit: With this version of MinGW, gdb won't work (it's not python-enabled). Although QtSDK is depracted (and you won't find it on qt-project.org), I highly recommend downloading this online installer and, during the selection of components mark only MinGW. It will come with folder named "pythongdb".
http://www.developer.nokia.com/info/sw.nokia.com/id/da8df288-e615-443d-be5c-00c8a72435f8/Qt_SDK.html
(You may need to register. It's free.)
////
Add "Compiler" by g++.exe
Add "Qt Version" by qmake.exe.
Add "Kit" with Compiler and Qt Version configured above. You can try to change debugger from CDB to GDB.
When you installed mingw, did you select the C++ compiler? It is not selected by default but you need it. Re-run the wizard and select that.
The kit is not valid because the C++ compiler cannot be found: try to install it first. If you still cannot setup this read the manual: http://doc-snapshot.qt-project.org/qtcreator-2.6/creator-targets.html. It is very complete.
qmake.exe is in *qt_directory*/bin/qmake.exe.
Try this out:
http://sourceforge.net/projects/mingw-w64/ (Since the mingw-w64 project on sourceforge.net is moving to mingw-w64.org i suggest to use mingw-w64.org)
It works for me.