75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
import {copy} from './vector.js';
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export class Select {
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sim = undefined;
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box = {
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start: undefined,
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end: undefined,
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};
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selectedSingle = undefined;
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selectedGroup = [];
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constructor(sim) {
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this.sim = sim;
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// TODO: Move this to a new Keyboard class singleton
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window.addEventListener('keydown', (e) => {
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switch (e.key) {
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case 'Tab': {
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e.preventDefault();
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if (!this.selectedGroup.length) return;
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const currentIdx = this.selectedGroup.indexOf(this.selectedSingle);
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const newIdx = (currentIdx + 1) % this.selectedGroup.length;
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this.selectedSingle = this.selectedGroup[newIdx];
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break;
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}
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}
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});
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}
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handlePointerDown({x: clientX, y: clientY}) {
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this.box.start = this.sim.screenToSim(clientX, clientY);
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this.box.end = this.box.start;
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this.getSelectedObjects();
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}
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handlePointerMove({x: clientX, y: clientY}) {
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if (!this.box.start) return;
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this.box.end = this.sim.screenToSim(clientX, clientY);
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}
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handlePointerUp() {
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if (!this.box.start) return;
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const start = copy(this.box.start);
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const end = copy(this.box.end);
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this.box.start = {
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x: Math.min(start.x, end.x),
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y: Math.min(start.y, end.y),
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};
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this.box.end = {
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x: Math.max(start.x, end.x),
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y: Math.max(start.y, end.y),
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};
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this.getSelectedObjects();
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this.box = {
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start: undefined,
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end: undefined,
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};
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}
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getSelectedObjects() {
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const {start, end} = this.box;
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if (!start) return;
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this.selectedGroup = this.sim.system.filter(({position: {x, y}}) => {
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return x >= start.x && x <= end.x && y >= start.y && y <= end.y;
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});
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// For now, first object in group is selected single
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this.selectedSingle = this.selectedGroup[0] ?? undefined;
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}
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frame() {
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if (!this.box.start) return;
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this.sim.display.drawBox(this.box)
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}
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}
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