Added code for API

src/API.ts

@@ -0,0 +1,20 @@
+// This file exposes the APIs of OSMD objects
+
+export class MusicSheetWrapper {
+    constructor() {
+        return;
+    }
+}
+
+
+// Expose the API
+let api: any = {
+    "MusicSheet": MusicSheetWrapper,
+};
+
+declare var module: any;
+if (typeof module !== "undefined") {
+    module.exports = api;
+} else {
+    (window as any).osmd = api;
+}

src/MusicalScore/Graphical/VexFlow/VexFlowConverter.ts

@@ -11,7 +11,6 @@ import {AccidentalEnum} from "../../../Common/DataObjects/pitch";
 import {NoteEnum} from "../../../Common/DataObjects/pitch";
 import {VexFlowGraphicalNote} from "./VexFlowGraphicalNote";
 import {GraphicalNote} from "../GraphicalNote";
-import Clef = Vex.Flow.Clef;
 
 export class VexFlowConverter {
     private static majorMap: {[_: number]: string; } = {

src/MusicalScore/Graphical/VexFlow/VexFlowMeasure.ts

@@ -33,8 +33,7 @@ export class VexFlowMeasure extends StaffMeasure {
     private vfbeams: { [voiceID: number]: Vex.Flow.Beam[]; } = {};
 
     public setAbsoluteCoordinates(x: number, y: number): void {
-        this.stave.setX(x);
-        this.stave.setY(y);
+        this.stave.setX(x).setY(y);
     }
 
     /**
@@ -130,15 +129,13 @@ export class VexFlowMeasure extends StaffMeasure {
      * @param width
      */
     public setWidth(width: number): void {
-        // Widths in PS and VexFlow work differently.
-        // In VexFlow, width is only the width of the actual voices, without considering
-        // modifiers like clefs. In PS, width is the total width of the stave.
-        // @Andrea: The following could be improved by storing the values in this object.
-        //          Now it calls .format() implicitly.
-        //
         super.setWidth(width);
+        // Set the width of the Vex.Flow.Stave
         this.stave.setWidth(width * this.unit);
+        // If this is the first stave in the vertical measure, call the format
+        // method to set the width of all the voices
         if (this.formatVoices) {
+            // The width of the voices does not include the instructions (StaveModifiers)
             this.formatVoices((width - this.beginInstructionsWidth - this.endInstructionsWidth) * this.unit);
         }
     }