initial public release.

src/core/state/KGMainContentState.ts

@@ -0,0 +1,29 @@
+/**
+ * KGMainContentState - State management for the main content area
+ * Implements the singleton pattern for global access
+ */
+export class KGMainContentState {
+  private static _instance: KGMainContentState | null = null;
+
+  private activeTool: string = "pointer";
+
+  private constructor() {
+    console.log("KGMainContentState initialized");
+  }
+
+  public static instance(): KGMainContentState {
+    if (!KGMainContentState._instance) {
+      KGMainContentState._instance = new KGMainContentState();
+    }
+    return KGMainContentState._instance;
+  }
+
+  // Getters and setters
+  public getActiveTool(): string {
+    return this.activeTool;
+  }
+
+  public setActiveTool(tool: string): void {
+    this.activeTool = tool;
+  }
+}

src/core/state/KGPianoRollState.ts

@@ -0,0 +1,51 @@
+/**
+ * KGPianoRollState - State management for the piano roll
+ * Implements the singleton pattern for global access
+ */
+export class KGPianoRollState {
+  private static _instance: KGPianoRollState | null = null;
+
+  public static SNAP_OPTIONS: string[] = ['NO SNAP', '1/3', '1/4', '1/6', '1/8', '1/12', '1/16', '1/24', '1/32'];
+  public static QUANT_POS_OPTIONS: string[] = ['1/3', '1/4', '1/6', '1/8', '1/12', '1/16', '1/24', '1/32'];
+  public static QUANT_LEN_OPTIONS: string[] = ['1/1', '1/2', '1/3', '1/4', '1/6', '1/8', '1/12', '1/16', '1/24', '1/32'];
+
+  private activeTool: string = "pointer";
+  private currentSnap: string = "NO SNAP";
+  private lastEditedNoteLength: number = 1; // Default to 1 beat
+
+  private constructor() {
+    console.log("KGPianoRollState initialized");
+  }
+
+  public static instance(): KGPianoRollState {
+    if (!KGPianoRollState._instance) {
+      KGPianoRollState._instance = new KGPianoRollState();
+    }
+    return KGPianoRollState._instance;
+  }
+
+  // Getters and setters
+  public getActiveTool(): string {
+    return this.activeTool;
+  }
+
+  public setActiveTool(tool: string): void {
+    this.activeTool = tool;
+  }
+
+  public getCurrentSnap(): string {
+    return this.currentSnap;
+  }
+
+  public setCurrentSnap(snap: string): void {
+    this.currentSnap = snap;
+  }
+
+  public getLastEditedNoteLength(): number {
+    return this.lastEditedNoteLength;
+  }
+
+  public setLastEditedNoteLength(length: number): void {
+    this.lastEditedNoteLength = length;
+  }
+}