From 9a0cb1148039c30b7a001bfca548e4223137ecbb Mon Sep 17 00:00:00 2001
From: lonkaars <loek@pipeframe.xyz>
Date: Sun, 23 May 2021 12:32:44 +0200
Subject: keyframes draggable :tada:g

---
 pages/editor.tsx     | 66 +++++++++++++++++++++++++++-------------------------
 styles/editor.css    | 10 ++++----
 timeline.schema.json | 18 +++++++++++++-
 timeline.ts          |  1 +
 4 files changed, 58 insertions(+), 37 deletions(-)

diff --git a/pages/editor.tsx b/pages/editor.tsx
index e1e164a..e3607e6 100644
--- a/pages/editor.tsx
+++ b/pages/editor.tsx
@@ -2,7 +2,7 @@ import { CSSProperties, ReactNode, useEffect, useRef, useState } from 'react';
 import { animated, useSpring, useSprings } from 'react-spring';
 import { useDrag } from 'react-use-gesture';
 import create from 'zustand';
-import { loopSlide } from '../timeline';
+import { delaySlide, loopSlide, slide, speedChangeSlide } from '../timeline';
 import { TimedVideoPlayer } from './present';
 
 import AppBar from '@material-ui/core/AppBar';
@@ -49,41 +49,43 @@ var useFrame = create(set => ({
 	setFrame: (newFrame: number) => set(() => ({ currentFrame: newFrame })),
 }));
 
-function TimelineEditor(props: {
-	player: TimedVideoPlayer;
+function TimelineKeyframe(props: {
+	slide: slide | delaySlide | loopSlide | speedChangeSlide;
 }) {
-	var timelineZoom = getTimelineZoom((st: any) => st.zoom);
-
-	var keyframes: Array<{
-		html: ReactNode;
-		id: string;
-	}> = [];
-	var [keyframeSprings, _keyframeSpringsAPI] = useSprings(
-		props.player?.timeline?.slides.length || 0,
-		i => ({
-			frame: props.player.timeline.slides[i].frame,
+	var ref = useRef(null);
+	var [spring, api] = useSpring(
+		() => ({
+			frame: props.slide.frame,
 			config: { mass: 0.5, tension: 500, friction: 20 },
 		}),
 	);
-	props.player?.timeline?.slides.forEach((slide, index) => {
-		var id = 'frame' + index;
-		var html = <animated.div
-			className='frame posabs'
-			style={{ '--frame': keyframeSprings[index].frame } as CSSProperties}
-			id={id}
-		>
-			<div className={'keyframeWrapper posabs abscenterh keyframe-index-' + index}>
-				{slide.type == 'loop'
-					? <Loop length={slide.frame - (slide as loopSlide).beginFrame} />
-					: <SlideKeyframe type={slide.type} />}
-			</div>
-		</animated.div>;
 
-		keyframes[index] = {
-			html,
-			id,
-		};
-	});
+	var timelineZoom = getTimelineZoom((st: any) => st.zoom);
+
+	useDrag(({ xy: [x, _y] }) => {
+		var frame = Math.max(0, Math.round(getFrameAtOffset(x - 240, timelineZoom)) - 1);
+		console.log(frame);
+		api.start({ frame });
+	}, { domTarget: ref, eventOptions: { passive: false } });
+
+	return <animated.div
+		className='frame posabs'
+		style={{ '--frame': spring.frame } as CSSProperties}
+		id={'slide-' + props.slide.id}
+		ref={ref}
+	>
+		<div className='keyframeWrapper posabs abscenterh'>
+			{props.slide.type == 'loop'
+				? <Loop length={props.slide.frame - (props.slide as loopSlide).beginFrame} />
+				: <SlideKeyframe type={props.slide.type} />}
+		</div>
+	</animated.div>;
+}
+
+function TimelineEditor(props: {
+	player: TimedVideoPlayer;
+}) {
+	var timelineZoom = getTimelineZoom((st: any) => st.zoom);
 
 	var timelineLabels = useTimelineLabels((st: any) => st.labels);
 	var setTimelineLabels = useTimelineLabels((st: any) => st.setLabels);
@@ -233,7 +235,7 @@ function TimelineEditor(props: {
 			<div
 				className='keyframes'
 				style={{ '--total-frames': props.player?.timeline?.framecount.toString() } as CSSProperties}
-				children={keyframes.map(kf => kf.html)}
+				children={props.player?.timeline?.slides.map(slide => <TimelineKeyframe slide={slide} />)}
 			/>
 		</div>
 	</>;
diff --git a/styles/editor.css b/styles/editor.css
index 5325004..3c30d68 100644
--- a/styles/editor.css
+++ b/styles/editor.css
@@ -218,7 +218,8 @@
 	overflow: visible;
 	filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
 	z-index: 1;
-	left: calc((var(--zoom) * (var(--frame) + 0.5)) * 1px - 1px)
+	left: calc((var(--zoom) * (var(--frame) + 0.5)) * 1px - 1px);
+	pointer-events: none;
 }
 
 .timeline .frameOverlay {
@@ -228,9 +229,10 @@
 	opacity: .0;
 }
 
-
-.timeline .scrubberJumpArea { cursor: grab; }
-.timeline .scrubberJumpArea:active { cursor: grabbing; }
+.timeline .scrubberJumpArea,
+.timeline .keyframes .frame .keyframeWrapper { cursor: grab; }
+.timeline .scrubberJumpArea:active,
+.timeline .keyframes .frame .keyframeWrapper:active { cursor: grabbing; }
 
 .timeline .scrubber .head { fill: var(--blue); }
 .timeline .scrubber .needle { background-color: var(--blue); }
diff --git a/timeline.schema.json b/timeline.schema.json
index c92e722..2d8c6ff 100644
--- a/timeline.schema.json
+++ b/timeline.schema.json
@@ -18,6 +18,9 @@
 				"frame": {
 					"type": "number"
 				},
+				"id": {
+					"type": "string"
+				},
 				"type": {
 					"$ref": "#/definitions/keyframeTypes"
 				}
@@ -26,6 +29,7 @@
 				"clickThroughBehaviour",
 				"delay",
 				"frame",
+				"id",
 				"type"
 			],
 			"type": "object"
@@ -55,6 +59,9 @@
 				"frame": {
 					"type": "number"
 				},
+				"id": {
+					"type": "string"
+				},
 				"playbackType": {
 					"enum": [
 						"PingPong",
@@ -70,6 +77,7 @@
 				"beginFrame",
 				"clickThroughBehaviour",
 				"frame",
+				"id",
 				"playbackType",
 				"type"
 			],
@@ -101,6 +109,9 @@
 				"frame": {
 					"type": "number"
 				},
+				"id": {
+					"type": "string"
+				},
 				"type": {
 					"$ref": "#/definitions/keyframeTypes"
 				}
@@ -108,7 +119,8 @@
 			"required": [
 				"frame",
 				"clickThroughBehaviour",
-				"type"
+				"type",
+				"id"
 			],
 			"type": "object"
 		},
@@ -125,6 +137,9 @@
 				"frame": {
 					"type": "number"
 				},
+				"id": {
+					"type": "string"
+				},
 				"newFramerate": {
 					"type": "number"
 				},
@@ -135,6 +150,7 @@
 			"required": [
 				"clickThroughBehaviour",
 				"frame",
+				"id",
 				"newFramerate",
 				"type"
 			],
diff --git a/timeline.ts b/timeline.ts
index 3a51ed3..764bc7a 100644
--- a/timeline.ts
+++ b/timeline.ts
@@ -4,6 +4,7 @@ export interface slide {
 	frame: number;
 	clickThroughBehaviour: 'ImmediatelySkip' | 'PlayOut';
 	type: keyframeTypes;
+	id: string;
 }
 
 export interface delaySlide extends slide {
-- 
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