From 147da7d29ebcdb1cef78ef75c12f97b15fc21bc6 Mon Sep 17 00:00:00 2001
From: Bigghead <shavenchew@yahoo.com>
Date: Mon, 21 Apr 2025 21:43:02 -0700
Subject: [PATCH] video preview shrinks/expands on mousemove

---
 anime-landing-page/src/main.ts   |  86 +++++++++++++++++++++++
 anime-landing-page/src/style.css | 116 +++++++++++++++----------------
 2 files changed, 144 insertions(+), 58 deletions(-)

diff --git a/anime-landing-page/src/main.ts b/anime-landing-page/src/main.ts
index 3f94069..8160c05 100644
--- a/anime-landing-page/src/main.ts
+++ b/anime-landing-page/src/main.ts
@@ -14,8 +14,16 @@ const elements = {
 
 const tl = gsap.timeline();
 const videoLength = 4;
+const videoPreview = elements["video-preview"];
+
 let currentVideo = 1;
 let hasPlayedOnce = false;
+let hasPreviewShowing = false;
+
+// this is new, gsap has an animation loop you can track and kill process of
+let expandTween: gsap.core.Tween | null = null;
+let shrinkTween: gsap.core.Tween | null = null;
+let shrinkTimer: gsap.core.Tween | null = null;
 
 // cant click while gsap is doing its thing
 let hasFinishedLoadingAnimation = true;
@@ -32,6 +40,80 @@ elements["video-preview"]?.addEventListener("click", () => {
   startNextVideo();
 });
 
+document.addEventListener("mousemove", () => {
+  // on mousemove, kill every animation process of the expanding preview
+  if (expandTween) {
+    expandTween.kill();
+    expandTween = null;
+  }
+  if (shrinkTimer) {
+    shrinkTimer.kill();
+    shrinkTimer = null;
+  }
+  if (shrinkTween) {
+    shrinkTween.kill();
+    shrinkTween = null;
+  }
+
+  if (!hasPreviewShowing) {
+    expandPreview();
+  } else {
+    restartShrinkTimer();
+  }
+});
+
+function expandPreview() {
+  expandTween = gsap.to(videoPreview, {
+    duration: 0.5,
+    width: "300px",
+    height: "200px",
+    opacity: 1,
+    // zIndex: 10,
+    onComplete: () => {
+      hasPreviewShowing = true;
+      startShrinkTimer();
+    },
+  });
+}
+
+/**
+ * Starts a delayed timer that will trigger the preview video to shrink after 3 seconds.
+ * If called again without clearing, multiple shrink timers could stack.
+ */
+function startShrinkTimer() {
+  shrinkTimer = gsap.delayedCall(5, () => {
+    shrinkPreview();
+  });
+}
+
+/**
+ * Restarts the shrink timer by killing the existing one (if any) and starting a new 3-second delay.
+ * Prevents multiple timers from overlapping.
+ */
+function restartShrinkTimer() {
+  if (shrinkTimer) {
+    shrinkTimer.kill();
+  }
+  startShrinkTimer();
+}
+
+/**
+ * Animates the preview video element to shrink to 0 size and fade out.
+ * Once the animation completes, updates the preview visibility state.
+ */
+function shrinkPreview() {
+  shrinkTween = gsap.to(videoPreview, {
+    duration: 0.5,
+    width: "0px",
+    height: "0px",
+    opacity: 0,
+    onComplete: () => {
+      hasPreviewShowing = false;
+      shrinkTween = null;
+    },
+  });
+}
+
 /**
  * Starts the transition to the next video.
  *
@@ -100,6 +182,10 @@ function startNextVideo(): void {
         hasPlayedOnce = true;
       },
     });
+    // tl.to(videoPreview, {
+    //   duration: 0.5,
+    //   opacity: 0.4,
+    // });
   });
 }
 
diff --git a/anime-landing-page/src/style.css b/anime-landing-page/src/style.css
index 816e184..768a3a1 100644
--- a/anime-landing-page/src/style.css
+++ b/anime-landing-page/src/style.css
@@ -1,58 +1,58 @@
-* {
-  margin: 0;
-  padding: 0;
-}
-
-html,
-body {
-  overflow: hidden;
-}
-
-.landing-hero {
-  width: 100vw;
-  height: 100vh;
-  background-color: lightblue;
-  position: relative;
-}
-
-.landing-hero .video-preview-container .video-preview {
-  width: 100%;
-  height: 100%;
-}
-
-.landing-hero .video-preview-container .video-preview {
-  position: absolute;
-  top: 50%;
-  left: 50%;
-  width: 300px;
-  height: 200px;
-  transform: translate(-50%, -50%);
-  object-fit: cover;
-  cursor: pointer;
-  z-index: 10;
-  transition: none;
-  border-radius: 8px;
-  opacity: 0.4;
-  transition: all 0.5s ease-in;
-  cursor: pointer;
-}
-
-.landing-hero .video-preview:hover {
-  opacity: 1;
-  width: 350px;
-  height: 250px;
-}
-
-.landing-hero .video-preview-container .invisible-preview {
-  visibility: hidden;
-  position: absolute;
-  top: 50%;
-  left: 50%;
-  width: 300px;
-  height: 200px;
-  transform: translate(-50%, -50%);
-  object-fit: cover;
-  cursor: pointer;
-  z-index: 5;
-  transition: none;
-}
+* {
+  margin: 0;
+  padding: 0;
+}
+
+html,
+body {
+  overflow: hidden;
+}
+
+.landing-hero {
+  width: 100vw;
+  height: 100vh;
+  background-color: lightblue;
+  position: relative;
+}
+
+.landing-hero .video-preview-container .video-preview {
+  width: 100%;
+  height: 100%;
+}
+
+.landing-hero .video-preview-container .video-preview {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  width: 0;
+  height: 0;
+  transform: translate(-50%, -50%);
+  object-fit: cover;
+  cursor: pointer;
+  z-index: 10;
+  transition: none;
+  border-radius: 8px;
+  opacity: 0.4;
+  transition: all 0.5s ease-in;
+  cursor: pointer;
+}
+
+.landing-hero .video-preview:hover {
+  opacity: 1;
+  width: 350px;
+  height: 250px;
+}
+
+.landing-hero .video-preview-container .invisible-preview {
+  visibility: hidden;
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  width: 300px;
+  height: 200px;
+  transform: translate(-50%, -50%);
+  object-fit: cover;
+  cursor: pointer;
+  z-index: 5;
+  transition: none;
+}