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Icons are not visible when installing Qt application on end user machine(Windows) Why?

  • Hello,
    I am junior software developer. I develop desktop applications using Qt application framework for 3 years. Currently I develop application that I putted(added) icons to it's menues' QActions, to buttons, to frames and windows, to textedit. I've created .qrc resource file and added icons from the resource file. I need to install the application on end user Windows XP(7) machine installing only .exe file and .dll libraries from the framework. When I install and launch the application on end user machine the icons are not visible, not loaded.The problem is that I have the icons visible only at the machine (OS) where I compiled and built the application and when putting the .exe file with needed .dlls(QtGui4.dll, QtCore4.dll,mingw10.dll,libgcc_s_dw2_1.dll) on the end user machine ( installation) the icons are not visible,not loaded.
    I have tried to use external binary resources ( I've compiled .qrc file with rcc and putted QResource::registerResource(...) and also I have tried compiled in resources and also tried to put icons from separate files. I made all the needed according to Qt Reference Documentation - the Qt Resource System. My icons are added to to .qrc resource file.
    But I see icons when I launch the application only at machine where I build the application and the icons are invisible when installing on end user machine. I build for Windows XP, 7. I also tried to install on end user machine the Qt SDK and copied my .exe file and .rcc file to directory ../Qt/2010.05/qt/bin, in such a case the icons are visible(loaded). But I don't need the users(clients) installs something else and heavy besides my .exe file and .dlls of Qt you understand.
    Please help, advise what is the problem with icons ( resources ) when you will help me I'll help you too from my experience with Qt.

  • Is there a plug-in that is needed for your images to work?

  • Hi Franzk
    What do you mean plug-in is needed? For what the plug-in?What kind of plug-in?
    No any plugin. It is regular thing the standart Qt SDK is enough,
    simply I've added icons and I do not seem them when installing
    What is the problem

  • Hi
    I need to clarify what is the problem, so I post in different places

    • the the post relates also to here and to development and installation
      So what is the problem with adding icons to an application?

  • Still, it's more of a deployment issue. Also, having the same conversation in two places will be confusing. Don't double post.

  • Ok
    You understand the thing another
    So what do you think why such a problem?

  • Standard Qt SDK contains a number of plugins you may not be aware of. Check the $QTDIR/plugins directory.

    What is the type of image you use? How do you reference the icons in your code? Did you use designer or do you hand code them? Did you use the correct path -- it is possible to forget the : and still have the icons in your development build due to amazingly conveniently coincidentally similarly named paths.

  • It's a general rule/guideline on a lot of forums, and has been for a long time. This is not without reason. The confusion might not be here now, but it might come in the future, when people start searching through old posts.

  • Thank you very much for your reply
    I do not know did not hear that there is need for additional plugin so as to add ans see icons
    I add my icons in Qt Designer, before that I add them to resource file
    The path is ok while I compile and launch the application on machine when it built and I see icons in there places when I've put them while developing?
    A put .exe, .rcc and dlls to end user and I see no icons?

  • See Qt Reference Documentation
    There is anything about you sould use any plugin so as to manage resources
    look at
    Qt Reference Documentation – the Qt Resource System

    there is wrote all should be ok, but the icons still invisible when installing...

  • I have tried also to deploy with dlls from plugins/codecs , plugins/imageformats, plugins/iconengines but still I can't see icons
    I can see only when I install full Qt SDK and I deploy to qt/bin directory
    But we understand the end user should not install full Qt SDK so as to use application
    why such a problem?>

  • What's the image type of your icons?

  • Closed thread due to duplicate post.

    Please follow up in

    Crossposting is not welcome in this forum (as it is in most other sites). Accept the rules - they are well chosen, you will not change them by arguing anyways. If you need explanations:

  • Moderators

    Just merged the two identical threads into one.

  • Hi Volker
    Thanks for your reply man
    my icons formats are .ico, .jpeg, .png
    why do you ask?

  • If you do not have installed the imageformat plugins correctly, your application is not able to display them (nor any other jpeg, png or ico image).

    You must maintain the directory hierarchy of the plugins like in the Qt install dir and you might want to add the plugin dir to the library path (use "QCoreApplication::addLibraryPath() ":

  • Yea
    but the plugins are installed when I install standart Qt SDK from the site ( open source )
    Now I try to include imageformats and iconenginer folders with dlls with my .exe and the dlls when I deploy
    Lets see how it installs

  • Of course you must provide copies of that files in your installation package, as well as the Qt libs.

  • Hello
    I deployed today with /plugins/imageformats folder
    It works only when I deploy may application exe, main Qt dlls as I mentioned and imageformats folder on windows
    Also I looked at Process Monitor output for my application and I see there that my application uses also QtSVG4.dll, QtXML4.dll but I think it is because resources are in xml format...
    How can I deploy on MacOS, Ubuntu, Symbian , Maemo?

  • [quote author="Pavel Mazniker" date="1298289603"]Hello
    I deployed today with /plugins/imageformats folder
    It works only when I deploy may application exe, main Qt dlls as I mentioned and imageformats folder on windows[/quote]

    Yes. Everyone told you exactly this.

    [quote author="Pavel Mazniker" date="1298289603"]Also I looked at Process Monitor output for my application and I see there that my application uses also QtSVG4.dll, QtXML4.dll but I think it is because resources are in xml format...


    [quote author="Pavel Mazniker" date="1298289603"]How can I deploy on MacOS, Ubuntu, Symbian , Maemo?

    Read the docs, search the forum and wiki, ask google and come back with actual questions.

    For OS X: the docs provide sufficient information.

    For Ubuntu: create a deb.

    For Symbian, Maemo: have a look at forum nokia and the docs for the respective platform.

  • Thank you all
    I succeed to deploy on Win7 using your advices
    I currently work on deploying to another platforms
    creating .sis installer


  • Hi, I'm sorry to bring up this old topic.
    I had the same problem and thanks to this thread I've fixed my icons. :)
    However I need to know if there is a way to determine which plugins EXACTLY does my application require, so i don't have to include all the plugins in my installation package?
    Thank you in advance!

  • dv879: have you tried to install the pugins one by one until everything works?

  • The project is HUGE and I can not determine if everything works the way you are suggesting. And there should definitely be a more "intelligent" way. :)
    I wanted to know if there are some kind of dependencies records, where I can check on which plugins depends my program...

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