phase 2 complete

src/App.tsx

@@ -1,28 +1,13 @@
 import { BrowserRouter, Route, Routes } from "react-router-dom";
 import Index from "@/Index";
 import Settings from "./Settings";
-import Layout from "./Layout";
 
 function App() {
     return (
         <BrowserRouter>
             <Routes>
-                <Route
-                    path="/"
-                    element={
-                        <Layout>
-                            <Index />
-                        </Layout>
-                    }
-                />
-                <Route
-                    path="/settings"
-                    element={
-                        <Layout>
-                            <Settings />
-                        </Layout>
-                    }
-                />
+                <Route path="/" element={<Index />} />
+                <Route path="/settings" element={<Settings />} />
             </Routes>
         </BrowserRouter>
     );

src/Index.tsx

@@ -1,16 +1,18 @@
-import { Stage, Layer, Circle } from "react-konva";
 import { useEffect, useState } from "react";
+import ShapeCanvas from "@/components/canvas/ShapeCanvas";
+import { useShapeState } from "@/hooks/useShapeState";
+import Layout from "./Layout";
 
 function Index() {
     const [dimensions, setDimensions] = useState({
-        width: window.innerWidth,
+        width: window.innerWidth - 320,
         height: window.innerHeight,
     });
 
     useEffect(() => {
         const handleResize = () => {
             setDimensions({
-                width: window.innerWidth,
+                width: window.innerWidth - 320,
                 height: window.innerHeight,
             });
         };
@@ -19,18 +21,15 @@ function Index() {
         return () => window.removeEventListener("resize", handleResize);
     }, []);
 
-    // canvas fills the available space (accounting for sidebar width of 320px)
-    const canvasWidth = dimensions.width - 320;
-    const canvasHeight = dimensions.height;
+    const centerX = dimensions.width / 2;
+    const centerY = dimensions.height / 2;
+
+    const [state, setState] = useShapeState(centerX, centerY);
 
     return (
-        <>
-            <Stage width={canvasWidth} height={canvasHeight} className="">
-                <Layer>
-                    <Circle x={canvasWidth / 2} y={canvasHeight / 2} radius={100} fill="#68d436" draggable />
-                </Layer>
-            </Stage>
-        </>
+        <Layout sidebarContent={<>controls here</>}>
+            <ShapeCanvas state={state} onStateChange={setState} />
+        </Layout>
     );
 }
 

src/Layout.tsx

@@ -3,7 +3,13 @@ import { Link, useLocation } from "react-router-dom";
 import { Home, Settings } from "lucide-react";
 import { Button } from "@/components/ui/button";
 
-export default function Layout({ children }: { children: React.ReactNode }) {
+export default function Layout({
+    children,
+    sidebarContent,
+}: {
+    children: React.ReactNode;
+    sidebarContent?: React.ReactNode;
+}) {
     const location = useLocation();
 
     return (
@@ -13,7 +19,7 @@ export default function Layout({ children }: { children: React.ReactNode }) {
                 <div className="flex items-center justify-between">
                     <h1 className="text-2xl font-semibold">The Shape of Sound</h1>
                 </div>
-                <div className="flex-1">{/* controls will go here in later phases */}</div>
+                <div className="flex-1">{sidebarContent || null}</div>
 
                 <div className="flex items-center gap-4">
                     <ThemeToggle className="rounded-lg" />

src/Settings.tsx

@@ -1,7 +1,9 @@
+import Layout from "@/Layout";
+
 export default function Settings() {
     return (
-        <div className="w-full h-full flex flex-col items-center justify-start">
+        <Layout>
             <p>Settings Page</p>
-        </div>
+        </Layout>
     );
 }

src/components/canvas/MorphableShape.tsx

@@ -0,0 +1,23 @@
+import { Circle } from "react-konva";
+import type { KonvaEventObject } from "konva/lib/Node";
+import type { ShapeState } from "@/types/shape";
+
+export default function MorphableShape({
+    state,
+    onStateChange,
+}: {
+    state: ShapeState;
+    onStateChange: (state: ShapeState) => void;
+}) {
+    const handleDrag = (e: KonvaEventObject<DragEvent>) => {
+        onStateChange({
+            ...state,
+            x: e.target.x(),
+            y: e.target.y(),
+        });
+    };
+
+    return (
+        <Circle x={state.x} y={state.y} radius={100} fill={state.color} draggable onDragMove={handleDrag} />
+    );
+}

src/components/canvas/ShapeCanvas.tsx

@@ -0,0 +1,37 @@
+import { Stage, Layer } from "react-konva";
+import { useEffect, useState } from "react";
+import MorphableShape from "./MorphableShape";
+import type { ShapeState } from "@/types/shape";
+
+export default function ShapeCanvas({
+    state,
+    onStateChange,
+}: {
+    state: ShapeState;
+    onStateChange: (state: ShapeState) => void;
+}) {
+    const [dimensions, setDimensions] = useState({
+        width: window.innerWidth - 320, // account for sidebar
+        height: window.innerHeight,
+    });
+
+    useEffect(() => {
+        const handleResize = () => {
+            setDimensions({
+                width: window.innerWidth - 320,
+                height: window.innerHeight,
+            });
+        };
+
+        window.addEventListener("resize", handleResize);
+        return () => window.removeEventListener("resize", handleResize);
+    }, []);
+
+    return (
+        <Stage width={dimensions.width} height={dimensions.height}>
+            <Layer>
+                <MorphableShape state={state} onStateChange={onStateChange} />
+            </Layer>
+        </Stage>
+    );
+}

src/components/ui/slider.tsx

@@ -1,61 +1,57 @@
-import * as React from "react"
-import * as SliderPrimitive from "@radix-ui/react-slider"
+import * as React from "react";
+import * as SliderPrimitive from "@radix-ui/react-slider";
 
-import { cn } from "@/lib/utils"
+import { cn } from "@/lib/utils";
 
 function Slider({
-  className,
-  defaultValue,
-  value,
-  min = 0,
-  max = 100,
-  ...props
+    className,
+    defaultValue,
+    value,
+    min = 0,
+    max = 100,
+    ...props
 }: React.ComponentProps<typeof SliderPrimitive.Root>) {
-  const _values = React.useMemo(
-    () =>
-      Array.isArray(value)
-        ? value
-        : Array.isArray(defaultValue)
-          ? defaultValue
-          : [min, max],
-    [value, defaultValue, min, max]
-  )
+    const _values = React.useMemo(
+        () => (Array.isArray(value) ? value : Array.isArray(defaultValue) ? defaultValue : [min, max]),
+        [value, defaultValue, min, max],
+    );
 
-  return (
-    <SliderPrimitive.Root
-      data-slot="slider"
-      defaultValue={defaultValue}
-      value={value}
-      min={min}
-      max={max}
-      className={cn(
-        "relative flex w-full touch-none items-center select-none data-[disabled]:opacity-50 data-[orientation=vertical]:h-full data-[orientation=vertical]:min-h-44 data-[orientation=vertical]:w-auto data-[orientation=vertical]:flex-col",
-        className
-      )}
-      {...props}
-    >
-      <SliderPrimitive.Track
-        data-slot="slider-track"
-        className={cn(
-          "bg-muted relative grow overflow-hidden rounded-full data-[orientation=horizontal]:h-1.5 data-[orientation=horizontal]:w-full data-[orientation=vertical]:h-full data-[orientation=vertical]:w-1.5"
-        )}
-      >
-        <SliderPrimitive.Range
-          data-slot="slider-range"
-          className={cn(
-            "bg-primary absolute data-[orientation=horizontal]:h-full data-[orientation=vertical]:w-full"
-          )}
-        />
-      </SliderPrimitive.Track>
-      {Array.from({ length: _values.length }, (_, index) => (
-        <SliderPrimitive.Thumb
-          data-slot="slider-thumb"
-          key={index}
-          className="border-primary ring-ring/50 block size-4 shrink-0 rounded-full border bg-white shadow-sm transition-[color,box-shadow] hover:ring-4 focus-visible:ring-4 focus-visible:outline-hidden disabled:pointer-events-none disabled:opacity-50"
-        />
-      ))}
-    </SliderPrimitive.Root>
-  )
+    return (
+        <SliderPrimitive.Root
+            data-slot="slider"
+            defaultValue={defaultValue}
+            value={value}
+            min={min}
+            max={max}
+            className={cn(
+                "relative flex w-full touch-none items-center select-none data-[disabled]:opacity-50 data-[orientation=vertical]:h-full data-[orientation=vertical]:min-h-44 data-[orientation=vertical]:w-auto data-[orientation=vertical]:flex-col",
+                className,
+            )}
+            {...props}
+        >
+            <SliderPrimitive.Track
+                data-slot="slider-track"
+                className={cn(
+                    "bg-muted relative grow overflow-hidden rounded-full data-[orientation=horizontal]:h-1.5 data-[orientation=horizontal]:w-full data-[orientation=vertical]:h-full data-[orientation=vertical]:w-1.5",
+                )}
+            >
+                <SliderPrimitive.Range
+                    data-slot="slider-range"
+                    className={cn(
+                        "bg-primary absolute data-[orientation=horizontal]:h-full data-[orientation=vertical]:w-full",
+                    )}
+                />
+            </SliderPrimitive.Track>
+            {Array.from({ length: _values.length }, (_, index) => (
+                <SliderPrimitive.Thumb
+                    data-slot="slider-thumb"
+                    // biome-ignore lint/suspicious/noArrayIndexKey: <>
+                    key={index}
+                    className="border-primary ring-ring/50 block size-4 shrink-0 rounded-full border bg-white shadow-sm transition-[color,box-shadow] hover:ring-4 focus-visible:ring-4 focus-visible:outline-hidden disabled:pointer-events-none disabled:opacity-50"
+                />
+            ))}
+        </SliderPrimitive.Root>
+    );
 }
 
-export { Slider }
+export { Slider };

src/components/ui/toggle.tsx

@@ -1,47 +1,46 @@
-"use client"
+"use client";
 
-import * as React from "react"
-import * as TogglePrimitive from "@radix-ui/react-toggle"
-import { cva, type VariantProps } from "class-variance-authority"
+import type * as React from "react";
+import * as TogglePrimitive from "@radix-ui/react-toggle";
+import { cva, type VariantProps } from "class-variance-authority";
 
-import { cn } from "@/lib/utils"
+import { cn } from "@/lib/utils";
 
 const toggleVariants = cva(
-  "inline-flex items-center justify-center gap-2 rounded-md text-sm font-medium hover:bg-muted hover:text-muted-foreground disabled:pointer-events-none disabled:opacity-50 data-[state=on]:bg-accent data-[state=on]:text-accent-foreground [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 [&_svg]:shrink-0 focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] outline-none transition-[color,box-shadow] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive whitespace-nowrap",
-  {
-    variants: {
-      variant: {
-        default: "bg-transparent",
-        outline:
-          "border border-input bg-transparent shadow-xs hover:bg-accent hover:text-accent-foreground",
-      },
-      size: {
-        default: "h-9 px-2 min-w-9",
-        sm: "h-8 px-1.5 min-w-8",
-        lg: "h-10 px-2.5 min-w-10",
-      },
+    "inline-flex items-center justify-center gap-2 rounded-md text-sm font-medium hover:bg-muted hover:text-muted-foreground disabled:pointer-events-none disabled:opacity-50 data-[state=on]:bg-accent data-[state=on]:text-accent-foreground [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 [&_svg]:shrink-0 focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] outline-none transition-[color,box-shadow] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive whitespace-nowrap",
+    {
+        variants: {
+            variant: {
+                default: "bg-transparent",
+                outline:
+                    "border border-input bg-transparent shadow-xs hover:bg-accent hover:text-accent-foreground",
+            },
+            size: {
+                default: "h-9 px-2 min-w-9",
+                sm: "h-8 px-1.5 min-w-8",
+                lg: "h-10 px-2.5 min-w-10",
+            },
+        },
+        defaultVariants: {
+            variant: "default",
+            size: "default",
+        },
     },
-    defaultVariants: {
-      variant: "default",
-      size: "default",
-    },
-  }
-)
+);
 
 function Toggle({
-  className,
-  variant,
-  size,
-  ...props
-}: React.ComponentProps<typeof TogglePrimitive.Root> &
-  VariantProps<typeof toggleVariants>) {
-  return (
-    <TogglePrimitive.Root
-      data-slot="toggle"
-      className={cn(toggleVariants({ variant, size, className }))}
-      {...props}
-    />
-  )
+    className,
+    variant,
+    size,
+    ...props
+}: React.ComponentProps<typeof TogglePrimitive.Root> & VariantProps<typeof toggleVariants>) {
+    return (
+        <TogglePrimitive.Root
+            data-slot="toggle"
+            className={cn(toggleVariants({ variant, size, className }))}
+            {...props}
+        />
+    );
 }
 
-export { Toggle, toggleVariants }
+export { Toggle, toggleVariants };

src/hooks/useShapeState.ts

@@ -0,0 +1,53 @@
+import { useState, useEffect, useRef } from "react";
+import type { ShapeState } from "@/types/shape";
+
+const DEFAULT_STATE: ShapeState = {
+    x: 0,
+    y: 0,
+    preset: "circle",
+    roundness: 100, // full circle
+    size: 50, // medium
+    wobble: 20, // subtle
+    wobbleSpeed: 50, // medium
+    grain: 0, // none
+    color: "#FF0000", // red (C)
+    octave: 4, // middle octave
+};
+
+export function useShapeState(centerX: number, centerY: number) {
+    const [state, setState] = useState<ShapeState>({
+        ...DEFAULT_STATE,
+        x: centerX,
+        y: centerY,
+    });
+
+    const initialStateRef = useRef<ShapeState>({
+        ...DEFAULT_STATE,
+        x: centerX,
+        y: centerY,
+    });
+
+    // update center position when canvas resizes
+    useEffect(() => {
+        setState((prev) => ({
+            ...prev,
+            x: centerX,
+            y: centerY,
+        }));
+    }, [centerX, centerY]);
+
+    // beforeunload warning
+    useEffect(() => {
+        const handleBeforeUnload = (e: BeforeUnloadEvent) => {
+            const hasChanged = JSON.stringify(state) !== JSON.stringify(initialStateRef.current);
+            if (hasChanged) {
+                e.preventDefault();
+            }
+        };
+
+        window.addEventListener("beforeunload", handleBeforeUnload);
+        return () => window.removeEventListener("beforeunload", handleBeforeUnload);
+    }, [state]);
+
+    return [state, setState] as const;
+}