Button.js

function EmptyButton() {
	this.sendValue = function(value, queue) {
		
	};
}

/**
 *  Button 
 *  
 * **/

function Button(midivalue, channel) {
    this.midivalue = midivalue;
    this.channel = channel === undefined ? 0 : channel;
    this.messageCallback = undefined;
    this.midistatus = MIDI.CC << 4 | this.channel;
    this.lastValue = -1;

    this.filterValue = function() {
        return this.midivalue;
    };

    this.sendValue = function(value, queue) {
        if(this.lastValue != value) {
            if(queue) {
                queueMidi(this.midistatus, this.midivalue, value);
            } else {
                host.getMidiOutPort(0).sendMidi(this.midistatus, this.midivalue, value);
            }
            this.lastValue = value;
        }
    };
	
	this.reset = function() {
		host.getMidiOutPort(0).sendMidi(this.midistatus, this.midivalue, 0);
	};
    
    this.resendLast = function() {
        if(this.lastValue >= 0) {
            queueMidi(this.midistatus, this.midivalue, this.lastValue);
        }
    };
    
    this.turnOn = function() {
        this.sendValue(127);
    };
    
    this.turnOff = function() {
         this.sendValue(0);
    };
    
    this.doCallback = function(value) {
      if(this.messageCallback !== undefined && typeof this.messageCallback === 'function') {
         this.messageCallback(value, this.midivalue);
      }
    };
    
    this.setCallback = function(callback) {
        this.messageCallback = callback;
    };
};