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useMoveEntities.ts
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useMoveEntities.ts
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import { HistoryCommand } from '../history/HistoryCommand';
import { Resolution } from '../utils/Resolution';
import { TimeValueRange } from '../utils/TimeValueRange';
import { registerMouseEvent } from '../utils/registerMouseEvent';
import { useCallback } from 'react';
import { useDispatch, useStore } from '../states/store';
import { useTimeValueRangeFuncs } from '../utils/useTimeValueRange';
interface Options {
moveValue: boolean;
snapOriginTime?: number;
snapOriginValue?: number;
}
export function useMoveEntites(
range: TimeValueRange,
size: Resolution,
): ( options: Options ) => void {
const dispatch = useDispatch();
const store = useStore();
const { dx2dt, dy2dv, snapTime, snapValue } = useTimeValueRangeFuncs( range, size );
const moveEntities = useCallback(
( { moveValue, snapOriginTime, snapOriginValue }: {
moveValue: boolean;
snapOriginTime?: number;
snapOriginValue?: number;
} ): void => {
const state = store.getState();
const automaton = state.automaton.instance;
if ( !automaton ) { return; }
const selected = state.timeline.selected;
const selectedItemsAsc = Object.values( selected.items ).map( ( { id, channel } ) => (
{ ...state.automaton.channels[ channel ].items[ id ], channel }
) ).sort( ( a, b ) => a.time - b.time );
const selectedItemsDesc = selectedItemsAsc.concat().reverse();
// -- decide history description -------------------------------------------------------------
let historyDescription = '';
if ( selected.labels.length > 0 ) {
if ( selectedItemsAsc.length > 0 ) {
historyDescription = 'Move Timeline Entities';
} else if ( selected.labels.length > 1 ) {
historyDescription = 'Move Labels';
} else {
historyDescription = `Move Label: ${ selected.labels[ 0 ] }`;
}
} else if ( selectedItemsAsc.length > 0 ) {
if ( selectedItemsAsc.length > 1 ) {
historyDescription = 'Move Items';
} else {
historyDescription = `Move Item: ${ selectedItemsAsc[ 0 ].channel }`;
}
}
// if nothing is selected, abort
if ( historyDescription === '' ) {
return;
}
// -- things needed for items ----------------------------------------------------------------
const itemsState0Map = new Map( selectedItemsAsc.map( ( item ) => (
[ item.$id, item ]
) ) );
const itemsNewTimeMap = new Map<string, number>();
const itemsNewValueMap = new Map<string, number>();
// -- things needed for labels ---------------------------------------------------------------
const labelsTime0Map = new Map( selected.labels.map( ( name ) => (
[ name, state.automaton.labels[ name ] ]
) ) );
const labelsNewTimeMap = new Map<string, number>();
// -- common stuff ---------------------------------------------------------------------------
let dx = 0.0;
let dt = 0.0;
let dy = 0.0;
let dv = 0.0;
const originTime = snapOriginTime ?? 0.0;
const originValue = snapOriginValue ?? 0.0;
// -- do the move ----------------------------------------------------------------------------
registerMouseEvent(
( event, movementSum ) => {
dx += movementSum.x;
dy += movementSum.y;
// -- keyboards --------------------------------------------------------------------------
const holdTime = ( event.ctrlKey || event.metaKey ) && moveValue;
const holdValue = event.shiftKey;
const ignoreSnap = event.altKey;
// -- calc dt / dv -----------------------------------------------------------------------
if ( !holdTime ) {
let t = originTime + dx2dt( dx );
if ( !ignoreSnap && snapOriginTime != null ) {
t = snapTime( t );
}
dt = t - originTime;
}
if ( !holdValue && moveValue ) {
let v = originValue + dy2dv( dy );
if ( !ignoreSnap && snapOriginValue != null ) {
v = snapValue( v );
}
dv = v - originValue;
}
// -- move items -------------------------------------------------------------------------
( movementSum.x > 0.0 ? selectedItemsDesc : selectedItemsAsc ).forEach( ( item ) => {
const newTime = itemsState0Map.get( item.$id )!.time + dt;
const newValue = itemsState0Map.get( item.$id )!.value + dv;
itemsNewTimeMap.set( item.$id, newTime );
itemsNewValueMap.set( item.$id, newValue );
const channel = automaton.getChannel( item.channel )!;
channel.moveItem( item.$id, newTime );
channel.changeItemValue( item.$id, newValue );
} );
// -- move labels ------------------------------------------------------------------------
selected.labels.forEach( ( name ) => {
const newTime = labelsTime0Map.get( name )! + dt;
labelsNewTimeMap.set( name, newTime );
automaton.setLabel( name, newTime );
} );
},
() => {
if ( dt === 0.0 && dv === 0.0 ) { return; }
const commands: HistoryCommand[] = [];
// -- push item commands -----------------------------------------------------------------
( dt > 0.0 ? selectedItemsDesc : selectedItemsAsc ).forEach( ( item ) => {
commands.push( {
type: 'channel/moveItem',
channel: item.channel,
item: item.$id,
time: itemsNewTimeMap.get( item.$id )!,
timePrev: itemsState0Map.get( item.$id )!.time,
} );
commands.push( {
type: 'channel/changeItemValue',
channel: item.channel,
item: item.$id,
value: itemsNewValueMap.get( item.$id )!,
valuePrev: itemsState0Map.get( item.$id )!.value,
} );
} );
// -- push label commands ----------------------------------------------------------------
selected.labels.forEach( ( name ) => {
commands.push( {
type: 'automaton/moveLabel',
name,
time: labelsNewTimeMap.get( name )!,
timePrev: labelsTime0Map.get( name )!,
} );
} );
// -- dispatch history command -----------------------------------------------------------
dispatch( {
type: 'History/Push',
description: historyDescription,
commands,
} );
}
);
},
[ dispatch, dx2dt, dy2dv, snapTime, snapValue, store ]
);
return moveEntities;
}