How to change a QPushButton's Icon String based on QTranslator

Question

I have an application with buttons that have icons set for the various click states, no actual QPushButton text is set or displayed; it is all contained in the icon.

These icon files include text that requires translation, and have already been generated for each language and state. I am looking for a way to use the QTranslator or QAction class to automatically select which localized version of the button to use based on the selected main language.

For example:

BTN_Media_Browse->setIcon(QIcon(QPixmap(tr(":/Images/BTN_Media_Browse_Unpressed.png"))));

I have followed the instructions on the QT Wiki: Multi Language Application but the buttons do not show up in the generated translation (.ts) files. Having a switch case for each instance of its use based on the language is not ideal.

Answer 1

To use different icons depending on the user's locale, you can add qresource section with lang attribute in your .qrc file.

For example:

<qresource>
    ...
    <file alias="Images/BTN_Media_Browse_Unpressed.png">Images/BTN_Media_Browse_Unpressed_en.png</file>
    ...
</qresource>
<qresource lang="de">
    ...
    <file alias="Images/BTN_Media_Browse_Unpressed.png">Images/BTN_Media_Browse_Unpressed_de.png</file>
    ...
</qresource>

Then you can use it with code like this:

BTN_Media_Browse->setIcon(QIcon(":/Images/BTN_Media_Browse_Unpressed.png"));