OS dependent import

yukikami

in Integration and Hardware • 2 months ago

Hi!

I'm new here so excuse me if I didn't select the right forum for my question.

I want to do a processing program which can be used both on Windows and Android. The problem is that the librairies I will import will depend on the OS on which the program is running.

I found how to know on which OS the program is running so I tried a simple "if(OS=windows)..." expression but "if" seem to be not allowed outside the setup function.

Would someone have an idea on how I could do that?

Replies(2)

dimkir

Re: OS dependent import

2 months ago

What are the imports?

UPDATE: there's this old thread trying to talk about this https://forum.processing.org/topic/if-like-preprocessor-statements-to-build-for-both-applets-and-android

But in general, you will anyways have to "export" manually your sketch to android and to desktop. So the simpliest would be to make extra tabs in your code, one with android-dependent code, and another with dekstop dependent code. So when you export to Android you comment the Desktop version and use Android-tab, whereas when you are about to export Desktop version - you uncomment desktop tab and comment android tab.

ps. If statement doesn't work on imports, so IMHO commenting would be the simpliest solution for you. However you need to keep in mind to only use platform-dependent code in your Android/Desktop tabs, whereas rest tabs of your sketch should be platform-independent (not using any non-standard processing code)

yukikami

Re: OS dependent import

2 months ago

Thank you for being so quick to answer.

I'm making a project using an arduino and what I want to do is importing processing.serial if the OS is windows because it will be plugged in USB, and importing ketai bluetooth when the OS is android so that I will use bluetooth on a tablet to talk with arduino.

I think that your solution is good but the main problem is that the platform dependent instructions will also be in the setup and draw function. I could do two tabs with a setup and a draw function in both but most of the code of setup and draw is platform independent. Only a few instructions will depend on the OS which is used so I would always have to copy the changes I make from one to another which is not very cool... :(

I wanted to use preprocessor statements like in C to be able to "erase" some parts of codes before compiling so that I would not have library errors so I created a "static final private boolean" and used it in my setup and draw to chose the correct statements to use but processing keeps verifying all the code even if there are some parts it will never use... I guess it is not possible to tell processing not to look some parts of the code while compiling... :/

So is my only solution to make 2 "main tabs" with a setup and a draw in each or is there a smart way to do that?