默认预览setup pose、修复播放动画时的画布缩放问题

release/UNIVERSAL_SpineViewer/_locales/de_DE.json

@@ -39,6 +39,7 @@
         "reloadTitle": "Ordner neu laden",
         "animationList": "Animationsliste",
         "animations": "Animationen",
+        "setupPose": "Setup Pose",
         "errorTitle": "Vorschau nicht möglich",
         "durationPlaceholder": "Dauer --",
         "keyframesLegend": "Blaue Marken: Keyframes",

release/UNIVERSAL_SpineViewer/_locales/en.json

@@ -41,6 +41,7 @@
         "reloadTitle": "Reload folder",
         "animationList": "Animation list",
         "animations": "Animations",
+        "setupPose": "Setup Pose",
         "errorTitle": "Cannot preview",
         "durationPlaceholder": "Duration --",
         "keyframesLegend": "Blue ticks: keyframes",

release/UNIVERSAL_SpineViewer/_locales/es_ES.json

@@ -39,6 +39,7 @@
         "reloadTitle": "Recargar carpeta",
         "animationList": "Lista de animaciones",
         "animations": "Animaciones",
+        "setupPose": "Setup Pose",
         "errorTitle": "No se puede previsualizar",
         "durationPlaceholder": "Duración --",
         "keyframesLegend": "Marcas azules: fotogramas clave",

release/UNIVERSAL_SpineViewer/_locales/ja_JP.json

@@ -39,6 +39,7 @@
         "reloadTitle": "フォルダーを再読み込み",
         "animationList": "アニメーション一覧",
         "animations": "アニメーション",
+        "setupPose": "Setup Pose",
         "errorTitle": "プレビューできません",
         "durationPlaceholder": "長さ --",
         "keyframesLegend": "青い線：キーフレーム",

release/UNIVERSAL_SpineViewer/_locales/ko_KR.json

@@ -39,6 +39,7 @@
         "reloadTitle": "폴더 다시 불러오기",
         "animationList": "애니메이션 목록",
         "animations": "애니메이션",
+        "setupPose": "Setup Pose",
         "errorTitle": "미리볼 수 없음",
         "durationPlaceholder": "길이 --",
         "keyframesLegend": "파란 선: 키프레임",

release/UNIVERSAL_SpineViewer/_locales/ru_RU.json

@@ -39,6 +39,7 @@
         "reloadTitle": "Перезагрузить папку",
         "animationList": "Список анимаций",
         "animations": "Анимации",
+        "setupPose": "Setup Pose",
         "errorTitle": "Просмотр невозможен",
         "durationPlaceholder": "Длительность --",
         "keyframesLegend": "Синие метки: ключевые кадры",

release/UNIVERSAL_SpineViewer/_locales/zh_CN.json

@@ -41,6 +41,7 @@
         "reloadTitle": "重新加载目录",
         "animationList": "动画列表",
         "animations": "动画",
+        "setupPose": "Setup Pose",
         "errorTitle": "无法预览",
         "durationPlaceholder": "时长 --",
         "keyframesLegend": "蓝色短线：关键帧",

release/UNIVERSAL_SpineViewer/_locales/zh_TW.json

@@ -41,6 +41,7 @@
         "reloadTitle": "重新載入目錄",
         "animationList": "動畫清單",
         "animations": "動畫",
+        "setupPose": "Setup Pose",
         "errorTitle": "無法預覽",
         "durationPlaceholder": "時長 --",
         "keyframesLegend": "藍色短線：關鍵影格",

release/UNIVERSAL_SpineViewer/viewer/spine.html

@@ -250,8 +250,9 @@
 	let renderer = null;
 	let activeRuntimeDir = null;
 	let activeVersion = null;
-	let currentAnim = 0, currentSkin = null;
-	let playing = true, loop = true, speed = 1;
+	const SETUP_POSE_INDEX = -1;
+	let currentAnim = SETUP_POSE_INDEX, currentSkin = null;
+	let playing = false, loop = true, speed = 1;
 	let premultipliedAlpha = false;
 	let previewSettings = null;
 	let timeKeeper = null, lastTime = 0, running = false;
@@ -265,6 +266,7 @@
 	// 画布平移 / 缩放状态（左键拖拽平移，滚轮缩放，右键回中心）
 	let panX = 0, panY = 0, zoom = 1;
 	let baseFitScale = 1, baseFitCx = 0, baseFitCy = 0;
+	let stableFitBounds = null;
 	let dragging = false;   // 是否正在拖拽
 	let dragStartX = 0, dragStartY = 0, dragStartPanX = 0, dragStartPanY = 0;
 
@@ -460,8 +462,17 @@
 	// baseFitScale 为自动适配用的基准缩放；panX/panY/zoom 为用户平移/缩放叠加。
 	// fitScale = baseFitScale * zoom；fitCx/fitCy 是骨骼包围盒中心（世界坐标）。
 	let fitScale = 1, fitCx = 0, fitCy = 0;
-	function fitToCanvas() {
+	function captureStableFitBounds() {
 		const bounds = getBounds(skeleton);
+		stableFitBounds = bounds && bounds.width > 0 && bounds.height > 0
+			? { x: bounds.x, y: bounds.y, width: bounds.width, height: bounds.height }
+			: null;
+	}
+
+	function fitToCanvas() {
+		// 自动适配始终使用加载完成时的 Setup Pose 包围盒。动画播放会改变当前帧
+		// 的包围盒，但不应改变用户滚轮缩放所依赖的基准比例。
+		const bounds = stableFitBounds;
 		const cw = canvas.clientWidth, ch = canvas.clientHeight;
 		if (!bounds || bounds.width <= 0 || bounds.height <= 0) {
 			baseFitScale = 1; baseFitCx = 0; baseFitCy = 0; fitScale = 1; fitCx = 0; fitCy = 0; return;
@@ -981,16 +992,25 @@
 	function fillAnimations() {
 		animationList.innerHTML = '';
 		const animations = skeletonData.animations || [];
-		animationPanel.style.display = animations.length ? 'flex' : 'none';
+		animationPanel.style.display = 'flex';
+		const setupItem = document.createElement('button');
+		setupItem.type = 'button';
+		setupItem.className = 'animation-item active';
+		setupItem.dataset.index = String(SETUP_POSE_INDEX);
+		setupItem.textContent = t('viewer.setupPose');
+		setupItem.title = t('viewer.setupPose');
+		setupItem.setAttribute('role', 'option');
+		setupItem.setAttribute('aria-selected', 'true');
+		animationList.appendChild(setupItem);
 		animations.forEach((a, i) => {
 			const item = document.createElement('button');
 			item.type = 'button';
-			item.className = 'animation-item' + (i === 0 ? ' active' : '');
+			item.className = 'animation-item';
 			item.dataset.index = String(i);
 			item.textContent = a.name;
 			item.title = a.name;
 			item.setAttribute('role', 'option');
-			item.setAttribute('aria-selected', i === 0 ? 'true' : 'false');
+			item.setAttribute('aria-selected', 'false');
 			animationList.appendChild(item);
 		});
 	}
@@ -1026,6 +1046,7 @@
 		const resolvedIndex = Number.isInteger(index) ? index : (skeletonData.animations || []).indexOf(anim);
 		if (resolvedIndex >= 0) selectAnimationItem(resolvedIndex);
 		state.setAnimation(0, name, loop);
+		playing = true;
 		updateTimelineDuration(anim);
 		state.update(0);
 		state.apply(skeleton);
@@ -1033,6 +1054,23 @@
 		draw();
 	}
 
+	function showSetupPose() {
+		if (!state || !skeleton) return;
+		selectAnimationItem(SETUP_POSE_INDEX);
+		playing = false;
+		if (typeof state.clearTracks === 'function') state.clearTracks();
+		else if (typeof state.clearTrack === 'function') state.clearTrack(0);
+		if (typeof skeleton.setToSetupPose === 'function') skeleton.setToSetupPose();
+		else {
+			if (typeof skeleton.setBonesToSetupPose === 'function') skeleton.setBonesToSetupPose();
+			if (typeof skeleton.setSlotsToSetupPose === 'function') skeleton.setSlotsToSetupPose();
+		}
+		updateWorld(skeleton);
+		updateTimelineDuration(null, true);
+		setStatus(t('viewer.setupPose'));
+		draw();
+	}
+
 	// 跨版本地通过名字查找动画（Spine 3.x / 4.x 都有 animations 数组）
 	function findAnimByName(name) {
 		const arr = (skeletonData && skeletonData.animations) || [];
@@ -1043,9 +1081,9 @@
 	}
 
 	// 更新时间轴范围（max = 动画时长），并把滑块归零，同时渲染关键帧标记
-	function updateTimelineDuration(anim) {
+	function updateTimelineDuration(anim, forceStatic = false) {
 		duration = animationDuration(anim);
-		isStaticAnimation = !!anim && duration <= STATIC_EPSILON;
+		isStaticAnimation = forceStatic || (!!anim && duration <= STATIC_EPSILON);
 		timeline.max = String(isStaticAnimation ? 1 : Math.max(duration, 0.001));
 		timeline.step = String(isStaticAnimation ? 1 : Math.min(1 / FPS, Math.max(duration / 1000, 0.001)));
 		timeline.value = '0';
@@ -1287,18 +1325,9 @@
 		fillAnimations();
 		fillSkins(currentSkin);
 
-		// 默认使用导出顺序中的第一个动画；duration=0 的动画按静帧处理。
-		if (skeletonData.animations.length > 0) {
-			const defaultAnim = skeletonData.animations[0];
-			state.setAnimation(0, defaultAnim.name, loop);
-			const idx = skeletonData.animations.indexOf(defaultAnim);
-			if (idx >= 0) selectAnimationItem(idx);
-			updateTimelineDuration(defaultAnim);
-		} else {
-			updateTimelineDuration(null);
-		}
-
-		updateWorld(skeleton);
+		// 默认显示 Setup Pose 静帧，由用户从列表中主动选择动画。
+		showSetupPose();
+		captureStableFitBounds();
 		fitToCanvas();
 		draw();
 
@@ -1330,6 +1359,10 @@
 		const item = e.target.closest('.animation-item');
 		if (!item) return;
 		const idx = parseInt(item.dataset.index, 10);
+		if (idx === SETUP_POSE_INDEX) {
+			showSetupPose();
+			return;
+		}
 		const anims = skeletonData.animations;
 		if (anims && anims[idx]) setAnimationByName(anims[idx].name, idx);
 	});