C++ & Qt

08 Jul 2025 15:21

Welcome to the group, -! :-)

Wanna share your story of how you started with Qt, QML or C++? Maybe some nice feature that made you stick with it.
Rules are set on the description of the group. :)

C++ & Qt

07 Jul 2025 20:02

There's usually a black background since images don't take up the whole screen especially when zoomed out

C++ & Qt

07 Jul 2025 19:51

I already have one that works a lot better than the current image viewer in the project I'm working on. Next thing to improve is to limit the panning to just the image boundaries instead of being to able to pan to black background 😄

C++ & Qt

07 Jul 2025 10:41

My bad. It worker.get() at the moment of calling was already nullptr

C++ & Qt

07 Jul 2025 10:36

There is a QMetaObject::invokeMethod

C++ & Qt

07 Jul 2025 09:51

You’ve seen this (I suppose)?

https://learn.microsoft.com/en-us/dotnet/core/native-interop/expose-components-to-com

C++ & Qt

07 Jul 2025 09:32

Any error message(s)?
A crash can happen in many situations. A common situation is to use an object out of its scope.

C++ & Qt

07 Jul 2025 08:10

Can you be more specific?

C++ & Qt

03 Jul 2025 13:58

Welcome to the group, -! :-)

Wanna share your story of how you started with Qt, QML or C++? Maybe some nice feature that made you stick with it.
Rules are set on the description of the group. :)

C++ & Qt

01 Jul 2025 21:28

It seems you should add this line to your cpp file:

extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

C++ & Qt

01 Jul 2025 20:40

This seems related: https://github.com/ocornut/imgui/issues/8255

C++ & Qt

01 Jul 2025 20:30

Perhaps you need to include same header? Or is there a spelling error?

C++ & Qt

30 Jun 2025 15:18

Welcome to the group, @ShehabGuii! :-)

Wanna share your story of how you started with Qt, QML or C++? Maybe some nice feature that made you stick with it.
Rules are set on the description of the group. :)

C++ & Qt

28 Jun 2025 04:28

I actually thought of that since I wasn't able to find one easily. It's already open source since I contribute it to an open source project but I'll probably make a separate one just for the viewer itself 😄

C++ & Qt

27 Jun 2025 14:06

In any case, I found a code that was semi working but the core thing was good so I just used that and improved it 😄

C++ & Qt

07 Jul 2025 21:10

property int zoom: 100
Image {
width: sourceSize.width * zoom / 100
height: sourceSize.height * zoom / 100
}

playing with zoom value you can change final image size

C++ & Qt

07 Jul 2025 19:54

It’s not clear for me what do you mean about black background.
There is an image with some size: width and height. There is an Item/Rectangle that represents your app area for the viewer. Image could be smaller or bigger than viewer area depending on zoom

C++ & Qt

07 Jul 2025 19:47

I have developed it with qml in not open source project. Can help with challenges

C++ & Qt

07 Jul 2025 10:40

If I try to QMetaObject::invokeMethod(worker.get(), &MyClass::init, Qt::QueuedConnection);, actual init never happens, and result of invoke is false

C++ & Qt

07 Jul 2025 10:14

I have a question. I have moved object to another thread(basically 1-to-1 as in qt's example). After the move has happened, I need to call init function for my object. But this function must be performed on second thread. Is there better way to do so, rather than create separate signal for that? Because signal for this case seems overkill

C++ & Qt

07 Jul 2025 09:36

It’s the .net library registered?

C++ & Qt

07 Jul 2025 09:20

In fact I can't invoke a PE.NET in memory with COM calls. I made a LoadTypeLib to retrieve the precise GUIDs from mscore.lib and at the end Invoke_3 return 0x0 and the process crash

C++ & Qt

07 Jul 2025 04:05

Hello everyone, I am facing a technical problem on a C++ and .NET project. I am looking for someone who has advanced knowledge in CLR and calls native COM please. I would be grateful, thank you.

C++ & Qt

01 Jul 2025 21:34

Yeah it worked thnks pal

C++ & Qt

01 Jul 2025 21:26

Thanks will read and understand whats happeening here

C++ & Qt

01 Jul 2025 20:33

I don't think so that whether it's a spelling error 😔

C++ & Qt

01 Jul 2025 20:25

I am getting this error
Please someone help
VS suggests to add
"imgui_impl_win32.cpp"
Which i believe is an anti practice to add cpp files

C++ & Qt

28 Jun 2025 19:37

heya :) if someone has an idea of a fix for this... https://bugreports.qt.io/browse/QTBUG-138093

C++ & Qt

27 Jun 2025 22:14

Will you open source it?

C++ & Qt

27 Jun 2025 14:05

I actually tried AI and it was useless. I don't use it much so maybe I'm not good with prompts yet 😅