Problem with QtQuick Controls
-
Did you compile it to a exe? "ref ":http://doc-snapshot.qt-project.org/qt5-nosubdir/qtquick-deployment.html
-
Hello,
I have the same problem when deploying an app on Windows with Qt Quick Controls and Qt 5.2.0. I get an error message on the command line saying "Cannot load library <SOME_PATH>/qtquickcontrolsplugin.dll". I double-checked <SOME_PATH> and the file definitely exists there. Moreover, I copied the file to varies subdirectories in my deployment folder without any success.
Thanks for any comments on this.
-
Hi frankem,
Try following this guide: http://qt-project.org/wiki/Deploy_an_Application_on_Windows
-
Hi JKSH,
thanks for your reply. I followed the tutorial and copied all the files to their respective locations. But still I get a blank screen. :-(
However, as stated above the problem seems to be with the Qt Quick Controls plugin. Has anybody ever deployed an application on Windows using Qt Quick Controls???
-
Hello,
have you tried to deploy it statically or dynamically? There was a thread about half a day ago with maybe the same problem, it's not solved yet.
"QML project can’t be run by Static Qt linking version , Qt 5.2":http://qt-project.org/forums/viewthread/38356/
If you are building dynamically you could try to make qtquickcontrols and place them in your folder. You can find the resources here:
PATH_TO_YOUR_QT\QT_VERSION\Src\qtquickcontrolsFor example:
C:\Qt\5.2.0\Src\qtquickcontrols -
Dear onek24,
I tried to deploy it dynamically. Static linking/deploying Qt/QML applications seems to be broken anyway since a couple of weeks and I think it's not even supported for QML applications.
Anyway I tried to deploy dynamically and I added all dll's from my Qt directory according to the link provided by JKSH. Even the qtquickcontrols.dll is included there but still there is a problem when loading this file although it's definitely there in the filesystem - once in the Qt directory and once in my own deployment folder.
I am really praying for a button "Deploy on Windows" in the next Qt Creator release as there are so many people having problems with the deployment process,
Any comments on this are very welcome.
-
- Does your app work when you run it in Qt Creator?
- How many versions of Qt do you have installed?
- Can you please provide screenshots of (i) your deployment folder, and (ii) your error message?
-
[quote author="JKSH" date="1392363736"]
-
Does your app work when you run it in Qt Creator?
-
How many versions of Qt do you have installed?
-
Can you please provide screenshots of (i) your deployment folder, and (ii) your error message?[/quote]
-
Yes, it's working in Qt Creator
-
I have only Qt 5.2.0 installed.
-
My deployment folder is 1,5 GB!!! (including a lot of debug dlls but anyway) My executable is "P4UGui.exe". Here are some screenshots:
Deployment folder
!http://dl.dropboxusercontent.com/u/55395871/deployment_folder.PNG(deployment_folder)!
Application Output
!http://dl.dropboxusercontent.com/u/55395871/app_output.png(app_output)!
Error message
!http://dl.dropboxusercontent.com/u/55395871/error_message.PNG(error_message)!
As already state above the file qtquickcontrolsplugin.dll is present in the folder deployment/QtQuick/Controls.
-
-
Thank you for the screenshots.
Please follow Step #2 of the "Initial deployment" section of the guide properly. You don't have all DLLs.
Where did you download this copy of Qt 5.2.0 from?
Where did you get D3DCompiler_43.dll from?
Do you have a file called "qtquick2controlsapplicationviewer.h" in your project? If so, please copy+paste its contents here.
-
Well I have to admit that you are right. ;-)
I copied ALL dlls from the ming48_32/bin folder and now it works. Finally my deployment folder holds 3 GB and now I will try to reduce this size step by step. I will update this post and tell you which dll I was missing finally.
Still I am wondering why the application doesn't complain about missing dlls as it used to do if you are missing e.g. Qt5Core.dll or Qt5Gui.dll. Furthermore, I used Dependency Walker and not even this one reported any missing dlls.
-
some dll are load at runtime, I always use Dependency Walker with profiling. http://www.dependencywalker.com/help/html/hidm_execute.htm
-
Ok finally I managed to squeeze down my deployment folder to 110 MB and it still works!!! I am pretty sure that I can further reduce memory as there might be a couple of more stuff in the folders Qt, QtQuick and QtQuick.2 which I actually do not need. Nevertheless, the only library I was missing in the end was Qt5Widgets.dll. I don't quite understand why this one is needed as I am actually using QML only for GUI.
Anyway....for your reference I attach another screenshot of the final working deployment folder. Maybe somebody else can make some use of it in the future.
Thanks again for your help......and your patience. ;-)
-
Thanks man. I didn't know about the profiling of Dependency Walker but it looks very useful to especially find the libraries which are loaded at runtime.
[quote author="dasun" date="1392478127"]some dll are load at runtime, I always use Dependency Walker with profiling. http://www.dependencywalker.com/help/html/hidm_execute.htm[/quote]
-
Glad to hear that you've succeeded! And thank you for sharing your final setup with the community.
[quote author="frankem" date="1392480026"]the only library I was missing in the end was Qt5Widgets.dll. I don't quite understand why this one is needed as I am actually using QML only for GUI. [/quote]Currently, Qt's styling capabilities are all located in the Qt Widgets module. Qt Quick Controls use these styles to look like native controls on your platform.
I'd imagine that the styling code would be refactored in Qt 6, so that we don't have Qt Quick apps relying on Qt Widgets code anymore. (The code can't be moved Qt 5.x unfortunately, because that would break binary compatibility)
