Error with midi addon

advanced
#1

So, i´ve been tryng to configure MIDI for my proyect. Im tryng the addon : Ofxmidi

I´ve tryed the midiinput example wich can´t compile,

Im having an error in this line of code :

midiIn.addListener(this);

This is the error i get :

Severity	Code	Description	Project	File	Line	Suppression State
Error (active)	E0167	argument of type "ofApp *" is incompatible with parameter of type "ofxMidiListener *"	FractalSuperForm	c:\Users\Julian\Downloads\of_v0.9.8_vs_release\of_v0.9.8_vs_release\apps\myApps\FractalSuperForm\src\ofApp.cpp	25		
Error	C2664	'void ofxMidiIn::addListener(ofxMidiListener *)': cannot convert argument 1 from 'ofApp *const ' to 'ofxMidiListener *'	FractalSuperForm	C:\Users\Julian\Downloads\of_v0.9.8_vs_release\of_v0.9.8_vs_release\apps\myApps\FractalSuperForm\src\ofApp.cpp	25

If I comment this line of code, the code compiles but it does´nt seem to record the values in the midimessage variable, thought i can´t print the values as hexadecimal values in console.
Whats wrong? im the only one having this trouble?

My version of Openframeworks is : of_v0.9.8_vs_release.

#2

Might be that you need to make ofApp inherit from ofxMidiListener so in ofApp.h…

class ofApp : public ofxMidiListener
{
void newMidiMessage(ofxMidiMessage& msg);
}

… and in ofApp.cpp…

void ofApp::newMidiMessage(ofxMidiMessage& msg)
{
// handle midi
}

#3

But ofApp is already inherit from another class.

thought i´ve try this without succes.

if I put :

class ofApp : public ofxMidiListener
{
void newMidiMessage(ofxMidiMessage& msg);
}

I get this error :

Severity Code Description Project File Line Suppression State
Error C2665 ‘ofRunApp’: none of the 3 overloads could convert all the argument types FractalSuperForm C:\Users\Julian\Downloads\of_v0.9.8_vs_release\of_v0.9.8_vs_release\apps\myApps\FractalSuperForm\src\main.cpp 11

This is my actual ofApp.h file :

#pragma once
#include "ofMain.h"
#include "ofxSpout2Sender.h"
#include "superfractal.h"
#include "ofxMidi.h"
#include "slider.h"
class ofApp : public ofBaseApp{

	public:
		void setup();
		void update();
		void draw();

		void keyPressed(int key);
		void keyReleased(int key);
		void mouseMoved(int x, int y );
		void mouseDragged(int x, int y, int button);
		void mousePressed(int x, int y, int button);
		void mouseReleased(int x, int y, int button);
		void mouseEntered(int x, int y);
		void mouseExited(int x, int y);
		void windowResized(int w, int h);
		void dragEvent(ofDragInfo dragInfo);
		void gotMessage(ofMessage msg);
		
		void exit();
		
		bool bInitialized;

		
		ofFbo fbo;
		ofxSpout2::Sender spout;
		
		//UTILS :
		bool showFramerate;

		//MIDI THINGS : 
		void initmidi();
		void newMidiMessage(ofxMidiMessage& eventArgs);
		void showMidiValues();
		stringstream text;
		//ofxMidiListener midilisten;
		ofxMidiIn midiIn;
		ofxMidiMessage midiMessage;

		//FRACTALS : 
		Superfractal sp;
		Slider slid;
		
};
#4

Oops, should have added that in too. You can actually inherit from both…

class ofApp : public ofBaseApp, public ofxMidiListener
{
}

#5

Thanks ! Solved !