@fulltopic See https://doc.qt.io/qt-5/macos.html#architectures
Qt 5.15 is available as binary for Mac arm64 (via official installer). Just install XCode and Qt and you can build for Apple Silicon.

@Pl45m4 Hi, I use below code to adjust widget size and the scroll bar is hide.Thank you very much.

QSize sizeTemp = viewport()->size(); testWidget->resize(sizeTemp);

For various reasons I've trashed WSL, so this is no longer an issue :) I've installed an Lubuntu 22.04 build VM

What COM object are you hosting in your MyChildQaxWidget?
If it's something like Internet Explorer, you might be better off using Qt's WebEngine instead.

Thank you all for your help. Based on your analysis, here is my solution,
Create section

auto pTextItem=new QGraphicsTextItem("QGraphicsTextItem",pV); auto id=reinterpret_cast<void*>(dynamic_cast<QGraphicsItem*>(pTextItem));

deletion

void DeleteGraphics(void* id) { if (id==nullptr) return; auto scene=m_pQGraphicsView->scene(); auto items=scene->items(); QGraphicsItem* item = static_cast<QGraphicsItem*>(id); if(items.contains(item)){ scene->removeItem(item); delete item; } }

@SGaist

@SGaist said in How to replace the QT installed by apt-get?:

Hi,

I'd go a step further than @JonB: you just don't.

Trying to replace your system libraries with variants built for development on a larger set of distribution is a no go.

Use the LD_LIBRARY_PATH environment variable to point your application to your custom Qt. Do it in the terminal you use to start that application or in a bash script to start the application.

Do NOT use it to modify which version of Qt is used by your whole system. This will only bring troubles.

Got it.

@jsulm ,

Got it,
I will check it first
Very Appreciate your help

Just add --verbose to the CMake build step. See below for details:

qtcreator-makefiles-verbose.png

Posting a solution for those who might encounter the same issue.

As per the suggestion mentioned in the bug report linked in my original post, starting from MacOS Sequoia, the Maintenance Tool app bundle needs to be signed and notarized separately (unless this is fixed in Qt IFW > 4.8).

Fix steps:

use the binarycreator to generate a Maintenance Tool (use your preferred config.xml) sign and notarize the Maintenance Tool yourself implement the logic of replacing the tool as per the Qt IFW documentation in your installscript.qs (provided in previous post) distribute the Maintenance Tool as other packages (your logic may vary here) additionally, you may need to elevate the Maintenance Tool's permissions by executing a chmod +x operation (can be done in your XML config)

Hi,

That's because it's in a layout inside another widget.

On a side note, please format your code properly using coding tags or the </> button in the editing toolbar.

In that case, use a universal build and target both architectures.

Hi,

Is that related to this thread ?

Where in that code is the cropping done ?

Hello everybody,

I'm overlucky: I found the error for myself (-:

The correct code line is now:

emit dataChanged(index(0),index(nparticles-1));

instead of

emit dataChanged(index(0),index(nparticles));

Now I can start working!

Thanks to all!

Tobias

What did you do to fix the problem ?

Changing the name fixed the runtime error, thank you. However, qmlls still complains about the import ("Warnings occured while importing...") and says "Unqualified access". Can you tell me why?

In my real-life code I want to instantiate an instance of a class in c++ and hand it over to QML without setting it as a context property, hence the call to qmlRegisterSingletonInstance.

Hi,

Which version of Qt ?
On which OS ?
Do you have the same issue if the other widget is not a QVideoWidget ?

Hi and welcome to devnet,

One thing that looks wrong is your if condition. 1080p is 1920x1080.

One thing you should try is the latest version of Qt 6. Improvements have happened on the High DPI side.