Image resources (png, ico) not rendering in app

[d_stranz]

Try wiping out everything in the GeneratedFiles directory for whichever build type you are doing. I have found that sometimes the Qt VS plugin gets confused over this. I've sometimes had to manually edit the .vcxproj / .vcproj files to fix build options so that all the right files are being included and built.

[xtal256]

Ah, I just noticed "GeneratedFiles" in the Visual Studio tree. I thought you were talking about the build output directory (Visual Studio uses the names "Debug" and "Release"), but this one is different. It's not a directory, just a node in the project tree structure. And I don't see the rcc generated file in there, only the moc and ui files. I'll have to read up on how to use the VS add-in, I suspect it should have added the rcc file in there and that's the reason why it's not working.

[d_stranz]

Hmmm - if things are working as they should, you should have an actual "GeneratedFiles" directory on disk at the same level as your source code. For my projects, the directory structure is typically:

Solution root /
    Project root /
        Source *.cpp, *.h
        Debug /      (for Win32 builds)
        GeneratedFiles /
            Debug /
                 moc_*.cpp
            Release /
                 moc_*.cpp
            qrc_<projectname>.cpp
            ui_*.cpp
        Release /  (Win32 builds)
        Resources /
           *.png
         x64 /
           Debug /
           Release /

Solution root /
    Project root /
        Source *.cpp, *.h
        Debug /      (for Win32 builds)
        GeneratedFiles /
            Debug /
                 moc_*.cpp
            Release /
                 moc_*.cpp
            qrc_<projectname>.cpp
            ui_*.cpp
        Release /  (Win32 builds)
        Resources /
           *.png
         x64 /
           Debug /
           Release /

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The qrc_<projectname>.cpp file is generated by RCC and is the conversion of your resources into binary strings to be compiled into your project.

Maybe you need to reinstall the Qt VS Add-in?

[xtal256]

Maybe you need to reinstall the Qt VS Add-in?

Perhaps. Or perhaps I just configured it to use a different directory because I didn't want my project littered with generated files and directories (Visual Studio already adds "Debug", "Release", "ipch", and a bunch of files).

I know "qrc_<projectname>.cpp" exists in the "Debug" directory, and it definitely contains the image data (as byte arrays). But it's not showing in the "GeneratedFiles" directory in Visual Studio. So it mustn't be getting compiled with the rest of the .cpp files.

It's been a while since I last worked on this project, but I remember I used to have to manually add moc and ui files to Visual Studio because I didn't have the add-in to handle all that stuff (I had Visual Studio Express, which can't run add-ins). I later got the add-in, but I can't remember if or how it's supposed to manage all the auto-generated files.

[xtal256]

Yeah, that did it. Once I added the "qrc_<projectname>.cpp" to GeneratedFiles, it got picked up by the build and now the images are showing correctly.