How to import a Processing file into a Processing file?

Question

I am making a Java Processing project in Processing IDE and would like to spread it across multiple PDE (Processing Source Code) files.

I am unable to import Java Processing Source Code file as a Java class file using import.

config.pde

public int screenWidth = 750;

project.pde

import project.config;
// OR
import project.config.screenWidth;
// OR
import config;
// OR
import config.screenWidth;

returns The import project/config cannot be resolved. respectively.

Do I have to compile PDE files first? Can I set up the Processing IDE to do it automatically for every run?

TLDR;

Having this project folder:

|project
|--project.pde
|--config.pde

How do I use functions and variables from config.pde in project.pde?

micycle · Accepted Answer · 2018-09-19 23:29:08Z

2

In general:

The Processing IDE may support multiple tabs but these do not behave like Java classes: every tab is a member of the same higher-level class behind the scenes. As a result, all members from all tabs share the same scope and a tab that declares a given primitive, object, method or class needn't be referenced when another tab accesses a member from it.

For this reason, declaring a member private in one tab will not reduce accessibility of it in other tabs; every declaration is effectively public, for they reside within the same outer-class scope.

import is only required when you wish to introduce and reference external libraries.

In your project:

Simply refer to screenWidth within the project.pde tab to access it. The same can be said for any methods you wish to reference between tabs.

edited Sep 19, 2018 at 23:29

answered Sep 19, 2018 at 23:23

micycle

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