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import { action, IReactionDisposer, observable, reaction, runInAction } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { RegionHelpers } from './Region';
import { Timeline } from './Timeline';
import './TimelineOverview.scss';
interface TimelineOverviewProps {
totalLength: number;
visibleLength: number;
visibleStart: number;
currentBarX: number;
isAuthoring: boolean;
parent: Timeline;
changeCurrentBarX: (pixel: number) => void;
movePanX: (pixel: number) => void;
time: number;
tickSpacing: number;
tickIncrement: number;
}
@observer
export class TimelineOverview extends React.Component<TimelineOverviewProps> {
@observable private _visibleRef = React.createRef<HTMLDivElement>();
@observable private _scrubberRef = React.createRef<HTMLDivElement>();
@observable private authoringContainer = React.createRef<HTMLDivElement>();
@observable private playbackContainer = React.createRef<HTMLDivElement>();
@observable private overviewBarWidth: number = 0;
@observable private playbarWidth: number = 0;
@observable private activeOverviewWidth: number = 0;
@observable private _authoringReaction?: IReactionDisposer = undefined;
@observable private visibleTime: number = 0;
@observable private currentX: number = 0;
@observable private visibleStart: number = 0;
private readonly DEFAULT_WIDTH = 300;
componentDidMount() {
this.setOverviewWidth();
this._authoringReaction = reaction(
() => this.props.isAuthoring,
() => {
if (!this.props.isAuthoring) {
runInAction(() => {
this.setOverviewWidth();
});
}
}
);
}
componentWillUnmount() {
this._authoringReaction && this._authoringReaction();
}
@action
setOverviewWidth() {
const width1 = this.authoringContainer.current?.clientWidth;
const width2 = this.playbackContainer.current?.clientWidth;
if (width1 && width1 !== 0) this.overviewBarWidth = width1;
if (width2 && width2 !== 0) this.playbarWidth = width2;
if (this.props.isAuthoring) {
this.activeOverviewWidth = this.overviewBarWidth;
} else {
this.activeOverviewWidth = this.playbarWidth;
}
}
@action
onPointerDown = (e: React.PointerEvent) => {
e.stopPropagation();
e.preventDefault();
document.removeEventListener('pointermove', this.onPanX);
document.removeEventListener('pointerup', this.onPointerUp);
document.addEventListener('pointermove', this.onPanX);
document.addEventListener('pointerup', this.onPointerUp);
};
@action
onPanX = (e: PointerEvent) => {
e.stopPropagation();
e.preventDefault();
const movX = (this.props.visibleStart / this.props.totalLength) * this.DEFAULT_WIDTH + e.movementX;
this.props.movePanX((movX / this.DEFAULT_WIDTH) * this.props.totalLength);
};
@action
onPointerUp = (e: PointerEvent) => {
e.stopPropagation();
e.preventDefault();
document.removeEventListener('pointermove', this.onPanX);
document.removeEventListener('pointerup', this.onPointerUp);
};
@action
onScrubberDown = (e: React.PointerEvent) => {
e.preventDefault();
e.stopPropagation();
document.removeEventListener('pointermove', this.onScrubberMove);
document.removeEventListener('pointerup', this.onScrubberUp);
document.addEventListener('pointermove', this.onScrubberMove);
document.addEventListener('pointerup', this.onScrubberUp);
};
@action
onScrubberMove = (e: PointerEvent) => {
e.preventDefault();
e.stopPropagation();
const scrubberRef = this._scrubberRef.current!;
const { left } = scrubberRef.getBoundingClientRect();
const offsetX = Math.round(e.clientX - left);
this.props.changeCurrentBarX((offsetX / this.activeOverviewWidth) * this.props.totalLength + this.props.currentBarX);
};
@action
onScrubberUp = (e: PointerEvent) => {
e.preventDefault();
e.stopPropagation();
document.removeEventListener('pointermove', this.onScrubberMove);
document.removeEventListener('pointerup', this.onScrubberUp);
};
@action
getTimes() {
const vis = RegionHelpers.convertPixelTime(this.props.visibleLength, 'mili', 'time', this.props.tickSpacing, this.props.tickIncrement);
const x = RegionHelpers.convertPixelTime(this.props.currentBarX, 'mili', 'time', this.props.tickSpacing, this.props.tickIncrement);
const start = RegionHelpers.convertPixelTime(this.props.visibleStart, 'mili', 'time', this.props.tickSpacing, this.props.tickIncrement);
this.visibleTime = vis;
this.currentX = x;
this.visibleStart = start;
}
render() {
this.setOverviewWidth();
this.getTimes();
const percentVisible = this.visibleTime / this.props.time;
const visibleBarWidth = percentVisible * this.activeOverviewWidth;
// const percentScrubberStart = this.currentX / this.props.time;
let scrubberStart = (this.props.currentBarX / this.props.totalLength) * this.activeOverviewWidth;
if (scrubberStart > this.activeOverviewWidth) scrubberStart = this.activeOverviewWidth;
const percentBarStart = this.visibleStart / this.props.time;
const barStart = percentBarStart * this.activeOverviewWidth;
let playWidth = (this.props.currentBarX / this.props.totalLength) * this.activeOverviewWidth;
if (playWidth > this.activeOverviewWidth) playWidth = this.activeOverviewWidth;
const timeline = this.props.isAuthoring
? [
<div key="timeline-overview-container" className="timeline-overview-container overviewBar" id="timelineOverview" ref={this.authoringContainer}>
<div ref={this._visibleRef} key="1" className="timeline-overview-visible" style={{ left: `${barStart}px`, width: `${visibleBarWidth}px` }} onPointerDown={this.onPointerDown} />,
<div ref={this._scrubberRef} key="2" className="timeline-overview-scrubber-container" style={{ left: `${scrubberStart}px` }} onPointerDown={this.onScrubberDown}>
<div key="timeline-overview-scrubber-head" className="timeline-overview-scrubber-head" />
</div>
</div>,
]
: [
<div key="1" className="timeline-play-bar overviewBar" id="timelinePlay" ref={this.playbackContainer}>
<div ref={this._scrubberRef} className="timeline-play-head" style={{ left: `${scrubberStart}px` }} onPointerDown={this.onScrubberDown} />
</div>,
<div key="2" className="timeline-play-tail" style={{ width: `${playWidth}px` }} />,
];
return (
<div className="timeline-flex">
<div className="timelineOverview-bounding">{timeline}</div>
</div>
);
}
}
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