fix in widgets

src/nodes/midi.js

@@ -882,6 +882,24 @@
                             this.properties.value1 = (v | 0) % 255;
                         }
                         break;
+                    case "cmd":
+                        var v = this.getInputData(i);
+                        if (v != null) {
+                            this.properties.cmd = v;
+                        }
+                        break;
+                    case "value1":
+                        var v = this.getInputData(i);
+                        if (v != null) {
+                            this.properties.value1 = Math.clamp(v|0,0,127);
+                        }
+                        break;
+                    case "value2":
+                        var v = this.getInputData(i);
+                        if (v != null) {
+                            this.properties.value2 = Math.clamp(v|0,0,127);
+                        }
+                        break;
                 }
             }
         }
@@ -950,7 +968,7 @@
     };
 
     LGMIDIEvent.prototype.onGetInputs = function() {
-        return [["note", "number"]];
+        return [["cmd", "number"],["note", "number"],["value1", "number"],["value2", "number"]];
     };
 
     LGMIDIEvent.prototype.onGetOutputs = function() {
@@ -1207,6 +1225,119 @@
 
     LiteGraph.registerNodeType("midi/quantize", LGMIDIQuantize);
 
+	function LGMIDIFromFile() {
+        this.properties = {
+            url: "",
+			autoplay: true
+        };
+
+        this.addInput("play", LiteGraph.ACTION);
+        this.addInput("pause", LiteGraph.ACTION);
+        this.addOutput("note", LiteGraph.EVENT);
+		this._midi = null;
+		this._current_time = 0;
+		this._playing = false;
+
+        if (typeof MidiParser == "undefined") {
+            console.error(
+                "midi-parser.js not included, LGMidiPlay requires that library: https://raw.githubusercontent.com/colxi/midi-parser-js/master/src/main.js"
+            );
+            this.boxcolor = "red";
+		}
+
+	}
+
+    LGMIDIFromFile.title = "MIDI fromFile";
+    LGMIDIFromFile.desc = "Plays a MIDI file";
+    LGMIDIFromFile.color = MIDI_COLOR;
+
+	LGMIDIFromFile.prototype.onAction = function( name )
+	{
+		if(name == "play")
+			this.play();
+		else if(name == "pause")
+			this._playing = !this._playing;
+	}
+
+	LGMIDIFromFile.prototype.onPropertyChanged = function(name,value)
+	{
+		if(name == "url")
+			this.loadMIDIFile(value);
+	}
+
+    LGMIDIFromFile.prototype.onExecute = function() {
+		if(!this._midi)
+			return;
+
+		if(!this._playing)
+			return;
+
+		this._current_time += this.graph.elapsed_time;
+		var current_time = this._current_time * 100;
+
+		for(var i = 0; i < this._midi.tracks; ++i)
+		{
+			var track = this._midi.track[i];
+			if(!track._last_pos)
+			{
+				track._last_pos = 0;
+				track._time = 0;
+			}
+
+			var elem = track.event[ track._last_pos ];
+			if(elem && (track._time + elem.deltaTime) <= current_time )
+			{
+				track._last_pos++;
+				track._time += elem.deltaTime;
+
+				if(elem.data)
+				{
+					var midi_cmd = elem.type << 4 + elem.channel;
+					var midi_event = new MIDIEvent();
+					midi_event.setup([midi_cmd, elem.data[0], elem.data[1]]);
+					this.trigger("note", midi_event);
+				}
+			}
+			
+		}
+    };
+
+	LGMIDIFromFile.prototype.play = function()
+	{
+		this._playing = true;
+		this._current_time = 0;
+		for(var i = 0; i < this._midi.tracks; ++i)
+		{
+			var track = this._midi.track[i];
+			track._last_pos = 0;
+			track._time = 0;
+		}		
+	}
+
+	LGMIDIFromFile.prototype.loadMIDIFile = function(url)
+	{
+		var that = this;
+		LiteGraph.fetchFile( url, "arraybuffer", function(data)
+		{
+			that.boxcolor = "#AFA";
+			that._midi = MidiParser.parse( new Uint8Array(data) );
+			if(that.properties.autoplay)
+				that.play();
+		}, function(err){
+			that.boxcolor = "#FAA";
+			that._midi = null;
+		});
+	}
+
+	LGMIDIFromFile.prototype.onDropFile = function(file)
+	{
+		this.properties.url = "";
+		this.loadMIDIFile( file );
+	}
+
+    LiteGraph.registerNodeType("midi/fromFile", LGMIDIFromFile);
+
+
     function LGMIDIPlay() {
         this.properties = {
             volume: 0.5,