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Cross-platform library to ease the interactive tuning of parameters at run time and without the need to recompile code.

Install on macOS using Homebrew

Run brew install casiez/libparamtuner/libparamtuner

Minimal example

#include <iostream>
#include <string>
#include "paramtuner.h"

#ifdef _WIN32
#   include <windows.h>
#   define SLEEP(ms) (Sleep(ms))
#   include <unistd.h>
#   define SLEEP(ms) (usleep(ms * 1000))

using namespace std;

int main() {
	double varDouble = 2.0;
	int varInt = 1;
	bool varBool = false;
	string varString;

	// Use the line below if you want to explicitly update
	// all parameters using update() function 
	// ParamTuner::load("settings.xml", true);
	ParamTuner::bind("setting1", &varDouble);
	ParamTuner::bind("setting2", &varInt);
	ParamTuner::bind("mybool", &varBool);
	ParamTuner::bind("mystring", &varString);

	while (true) {
		SLEEP(500); // 500 ms
		// Uncomment the line below if you use ParamTuner::load("settings.xml", true);
		// ParamTuner::update();
		cout << "setting1 (double) = " << varDouble
			<< " ; setting2 (int) = " << varInt
			<< " ; mybool (bool) = " << varBool
			<< " ; mystring (string) = " << varString
			<< endl;

The associated settings.xml file is as follows:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
	<mybool type="bool" value="true"/>
	<mystring type="string" value="hello libParamTuner"/>
	<setting1 type="double" min="0.0" max="100.0" value="0.3"/>
	<setting2 type="int" min="0" max="50" value="5"/>

C++ Library

The C++ libParamTuner library use system-dependent libraries that are already installed in their respective OS :


  • In directory src/cpp, run make
  • Library file : libparamtuner.a
  • Header file : paramtuner.h

Usage and documentation

Read detailed documentation in the header file paramtuner.h

Example files

Some examples files are available in examples/cpp directory. You can compile them with make [C++ filename without extension] command.

Java 8+ Library

Compilation and installation

The Java library use Maven. In directory src/java, run mvn clean install. This command will create a libParamTuner.jar in the target subdirectory. Also, it will install it into your local maven repository, so you can use it in an other Maven project.

To use it in a Maven project, add theses lines in your POM's <dependencies> section :


If you have a non-Maven project, just add libParamTuner.jar to the build path of your project.

To get the javadoc, run mvn javadoc:javadoc , then go to the subdirectory target/site/apidocs

ParamTuner GUI

This JavaFX interface allow developers to change value in real-time without having to edit the settings file manually.

Available binaries

See the releases section to directly download a binary version.


The Java application use Maven. First, you have to compile the Java library (see instruction above). Then, in directory src/gui, run mvn package. The executable Jar is in subdirectory target.

If you want to create an installer with an executable, run mvn jfx:native. Note that icns icons for macOS were created using the command makeicns -in ParamTunerGUI.png -out ParamTunerGUI.icns


java -jar ParamTunerGUI.jar path/to/settings.xml


java -jar ParamTunerGUI.jar

then you can put the path to the XML directly into the GUI.

More information

libParamTuner has been presented as a demo during the IHM'17 conference. More information (in French) available on HAL.


Cross-platform library to ease the interactive tuning of parameters without the need to recompile code




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