How do you set application icon for application made using Qt? Is there some easy way? It's a qmake-based project.
For Qt 5, this process is automated by qmake. Just add the following to the project file:
win32:RC_ICONS += your_icon.ico
The automated resource file generation also uses the values of the following qmake variables:
VERSION, QMAKE_TARGET_COMPANY, QMAKE_TARGET_DESCRIPTION, QMAKE_TARGET_COPYRIGHT, QMAKE_TARGET_PRODUCT, RC_LANG, RC_CODEPAGE.
For Qt 4, you need to do it manually. On Windows, you need to create a .rc file and add it to your project (.pro). The RC file should look like this:
IDI_ICON1 ICON DISCARDABLE "path_to_you_icon.ico"
The .pro entry should also be win32 specific, e.g.:
win32:RC_FILE += MyApplication.rc
To extend Rob's answer, you can set an application icon for macOS by adding and modifying the following line onto your
macx: ICON = <app_icon>.icns
Note that the
ICON qmake variable is only meant to target macOS.
For Windows, use
RC_ICONS = <app_icon>.icoif you're attaching a
RC_FILE = <app_icon>.rcif you want to attach your icon through a
.rcfile. (Be sure to add
IDI_ICON1 ICON DISCARDABLE "myappico.ico"into the rc file. Indentation not mine.)
For further reading, see Setting the Application Icon.