I'm developing a simple text editor, just to practice a little bit.
I'm developing it under Linux but since I am using Qt as GUI Framework I can easily compile this on a Windows or Mac with the same code (in other words, it's cross-platform).
Qt offers a function
QIcon::fromTheme(). This function allows me to get the standard Icon for e.g. the New Document Icon and use it for whatever I want. These Icons are sadly only available on Linux. However, I wrote a simple function to save these icons as PNG files in different formats (16x16 up to 1024x1024) so that I can use these on a Windows as well.
Now my question, is it even legal to use these images on windows as well? And would you find it strange if such icons appear in a windows program? Because Linux has a whole different style than windows... Same thing with OS X'.
The New Document Icon for example would look similar to this: