How can I add QtPdf module to Qt Design Studio?

[Serhan Kars]

I am a user of Qt Design Studio 4.4.0. I would like to add PdfViewer element to my designs. But I get the error messages:

"module "QtQuick.Pdf" is not installed"

An explanation to add QtPdf module to Qt Design Studio will be appreciated. Thank you.

[afalsa]

@Serhan-Kars

Hello mate!

I am going to tell how you can do it in Windows and Qt Design Studio 4.1.0 (But it will be more or less the same for other versions)

• Go to QT_FOLDER/msvc/ instalation folder

C:\Qt\6.6.0\msvc2019_64\qml\QtQuick

• Copy Pdf folder
• Go to Tools/QtDesignStudio folder

C:\Qt\Tools\QtDesignStudio-4.1.0-lts\qt6_design_studio_reduced_version\qml\QtQuick

• Paste Pdf folder.

I dont know if this generates another error but at least it will find the module.

Notes:

• Your QtQuick.Pdf module version should be equal or higher than the indicated in QtDesignStudio>Help>About Qt Design Studio

In my case:

Based on Qt 6.5.4 (MSVC 2019, x86_64)

[Serhan Kars]

@afalsa Thanks for answer.

I tried. I have copied the Pdf folders of versions 6.5.4, 6.6.2* and 6.7.0 to the location mentioned.

None of them worked. Still when I tried to run the design project I get the error message:

Cannot load library C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\qml\QtQuick\Pdf\pdfquickplugin.dll: The specified module could not be found. (file:///{SOMETHING ABOUT MY PROJECT}.qml:6, (null))

It is in fact in that location.

*PS: Instead of "QtDesignStudio>Help>About Qt Design Studio" Qt version we should copy the QT Design Studio's Kit version (6.6.2 in my case).

[JKSH]

@Serhan-Kars said in How can I add QtPdf module to Qt Design Studio?:

Cannot load library C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\qml\QtQuick\Pdf\pdfquickplugin.dll: The specified module could not be found. (file:///{SOMETHING ABOUT MY PROJECT}.qml:6, (null))

It is in fact in that location.

My guess: Even though pdfquickplugin.dll is in that location, you have some missing dependencies. Use https://github.com/lucasg/Dependencies to examine that DLL and see what's missing.

[Serhan Kars]

@JKSH Thank you for the answer. Yes I have used dependencies to find the missing dlls.
Copied missing dlls to the same location with pdfquickpluign.dll. Currently I hove no missing dependencies but my problem continues (with the same error message)

[afalsa]

@Serhan-Kars

Well, it is true.

Indeed, adding this to .qmlproject doesnt reveal anything helpfull

        QML_IMPORT_TRACE: "1"
        QT_QML_DEBUG: "1"
        QT_DECLARATIVE_DEBUG: "1"

Debug: locateLocalQmldir: QtQuick.Pdf module's qmldir found at "C:/Qt/Tools/QtDesignStudio/qt6_design_studio_reduced_version/qml/QtQuick/Pdf/qmldir" ((null):0, (null))
Warning: QQmlApplicationEngine failed to load component ((null):0, (null))
Warning: file:////BaseComponent.qml:3:1: No se puede cargar la biblioteca C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\qml\QtQuick\Pdf\pdfquickplugin.dll: No se puede encontrar el módulo especificado. (file:///BaseComponent.qml:3, (null))

Now I'm a bit lost

[JKSH]

@Serhan-Kars said in How can I add QtPdf module to Qt Design Studio?:

Copied missing dlls to the same location with pdfquickpluign.dll

In Windows, a plugin's dependencies are not loaded from the plugin's own folder. You need to put those DLLs in the same folder where the previewer loads Qt6Core.dll (C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\bin in your case)

By the way, here is the bug report about the missing "QtQuick.Pdf" module: https://bugreports.qt.io/browse/QDS-10888

[Serhan Kars]

@JKSH said in How can I add QtPdf module to Qt Design Studio?:

C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\bin

Thank you very much @JKSH. Copying the dlls that plugin needed to C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\bin solved my problem

[Tim.Jenssen]

somehow I oversaw that - 4.5 will have it, next time just create a bug report and we will see it earlier - https://bugreports.qt.io/browse/QDS-12654