only show play/pause when there are animations

src/app/WardrobePage/OutfitControls.js

@@ -29,7 +29,11 @@ import useOutfitAppearance from "../components/useOutfitAppearance";
  * OutfitControls is the set of controls layered over the outfit preview, to
  * control things like species/color and sharing links!
  */
-function OutfitControls({ outfitState, dispatchToOutfit }) {
+function OutfitControls({
+  outfitState,
+  dispatchToOutfit,
+  showAnimationControls,
+}) {
   const [focusIsLocked, setFocusIsLocked] = React.useState(false);
   const onLockFocus = React.useCallback(() => setFocusIsLocked(true), [
     setFocusIsLocked,
@@ -140,11 +144,13 @@ function OutfitControls({ outfitState, dispatchToOutfit }) {
           d="inline-flex" // Not sure why <a> requires this to style right! ^^`
         />
       </Box>
-      <Box gridArea="play-pause" display="flex" justifyContent="center">
-        <DarkMode>
-          <PlayPauseButton />
-        </DarkMode>
-      </Box>
+      {showAnimationControls && (
+        <Box gridArea="play-pause" display="flex" justifyContent="center">
+          <DarkMode>
+            <PlayPauseButton />
+          </DarkMode>
+        </Box>
+      )}
       <Stack
         gridArea="sharing"
         alignSelf="flex-end"

src/app/WardrobePage/index.js

@@ -29,6 +29,10 @@ function WardrobePage() {
   const toast = useToast();
   const { loading, error, outfitState, dispatchToOutfit } = useOutfitState();
 
+  // Whether the current outfit preview has animations. Determines whether we
+  // show the play/pause button.
+  const [hasAnimations, setHasAnimations] = React.useState(false);
+
   usePageTitle(outfitState.name || "Untitled outfit");
 
   // TODO: I haven't found a great place for this error UI yet, and this case
@@ -64,12 +68,14 @@ function WardrobePage() {
             appearanceId={outfitState.appearanceId}
             wornItemIds={outfitState.wornItemIds}
             engine="canvas"
+            onChangeHasAnimations={setHasAnimations}
           />
         }
         controls={
           <OutfitControls
             outfitState={outfitState}
             dispatchToOutfit={dispatchToOutfit}
+            showAnimationControls={hasAnimations}
           />
         }
         itemsAndSearch={

src/app/components/OutfitCanvas.js

@@ -8,7 +8,13 @@ const EaselContext = React.createContext({
   removeResizeListener: () => {},
 });
 
-function OutfitCanvas({ children, width, height, pauseMovieLayers }) {
+function OutfitCanvas({
+  children,
+  width,
+  height,
+  pauseMovieLayers = true,
+  onChangeHasAnimations = null,
+}) {
   const [stage, setStage] = React.useState(null);
   const resizeListenersRef = React.useRef([]);
   const canvasRef = React.useRef(null);
@@ -43,6 +49,14 @@ function OutfitCanvas({ children, width, height, pauseMovieLayers }) {
       if (afterFirstDraw) {
         stage.on("drawend", afterFirstDraw, null, true);
       }
+
+      if (onChangeHasAnimations) {
+        const hasAnimations = stage.children.some((c) =>
+          createjsNodeHasAnimations(c)
+        );
+        onChangeHasAnimations(hasAnimations);
+      }
+
       // NOTE: We don't bother firing an update, because we trust the ticker
       //       to do it on the next frame.
     },
@@ -52,6 +66,14 @@ function OutfitCanvas({ children, width, height, pauseMovieLayers }) {
   const removeChild = React.useCallback(
     (child) => {
       stage.removeChild(child);
+
+      if (onChangeHasAnimations) {
+        const hasAnimations = stage.children.some((c) =>
+          createjsNodeHasAnimations(c)
+        );
+        onChangeHasAnimations(hasAnimations);
+      }
+
       // NOTE: We don't bother firing an update, because we trust the ticker
       //       to do it on the next frame. (And, I don't understand why, but
       //       updating here actually paused remaining movies! So, don't!)

src/app/components/OutfitPreview.js

@@ -39,6 +39,7 @@ function OutfitPreview({
   loadingDelayMs,
   spinnerVariant,
   engine = "images",
+  onChangeHasAnimations = null,
 }) {
   const { loading, error, visibleLayers } = useOutfitAppearance({
     speciesId,
@@ -72,6 +73,7 @@ function OutfitPreview({
       loadingDelayMs={loadingDelayMs}
       spinnerVariant={spinnerVariant}
       engine={engine}
+      onChangeHasAnimations={onChangeHasAnimations}
       doTransitions
     />
   );
@@ -89,6 +91,7 @@ export function OutfitLayers({
   spinnerVariant = "overlay",
   doTransitions = false,
   engine = "images",
+  onChangeHasAnimations = null,
 }) {
   const containerRef = React.useRef(null);
   const [canvasSize, setCanvasSize] = React.useState(0);
@@ -158,6 +161,7 @@ export function OutfitLayers({
                 width={canvasSize}
                 height={canvasSize}
                 pauseMovieLayers={isPaused}
+                onChangeHasAnimations={onChangeHasAnimations}
               >
                 {visibleLayers.map((layer) =>
                   layer.canvasMovieLibraryUrl ? (