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feat(toolbar): add toolbar item and clear action
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,89 +1,108 @@ | ||
| import { useEffect, useRef, useState } from 'react'; | ||
| import { useEffect, useRef, useCallback } from 'react'; | ||
|
|
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| type Line = { x: number; y: number }[]; | ||
|
|
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| export const useCanvasDrawing = ( | ||
| parentRef?: React.RefObject<HTMLDivElement> | ||
| ) => { | ||
| const canvasRef = useRef<HTMLCanvasElement | null>(null); | ||
| const [isDrawing, setIsDrawing] = useState(false); | ||
| const [lines, setLines] = useState<Line[]>([]); | ||
| const isDrawingRef = useRef(false); | ||
| const linesRef = useRef<Line[]>([]); | ||
|
|
||
| useEffect(() => { | ||
| const canvas = canvasRef.current; | ||
| const clearCanvas = () => { | ||
| linesRef.current = []; | ||
| redrawLines(); | ||
| }; | ||
|
|
||
| const drawLine = useCallback((line: Line) => { | ||
| const canvas = canvasRef.current; | ||
| if (!canvas) { | ||
| return; | ||
| } | ||
| const ctx = canvas.getContext('2d'); | ||
|
|
||
| if (!ctx || line.length < 2) { | ||
| return; | ||
| } | ||
|
|
||
| const [start, ...rest] = line; | ||
| ctx.beginPath(); | ||
| ctx.moveTo(start.x, start.y); | ||
| rest.forEach((point) => { | ||
| ctx.lineTo(point.x, point.y); | ||
| }); | ||
| ctx.stroke(); | ||
| }, []); | ||
|
|
||
| const redrawLines = useCallback(() => { | ||
| const canvas = canvasRef.current; | ||
| if (!canvas) { | ||
| return; | ||
| } | ||
| const ctx = canvas.getContext('2d'); | ||
| if (!ctx) { | ||
| if (!canvas || !ctx) { | ||
| return; | ||
| } | ||
|
|
||
| const redrawLines = () => { | ||
| ctx.clearRect(0, 0, canvas.width, canvas.height); | ||
| lines.forEach((line) => { | ||
| ctx.beginPath(); | ||
| line.forEach((point, index) => { | ||
| if (index === 0) { | ||
| ctx.moveTo(point.x, point.y); | ||
| } else { | ||
| ctx.lineTo(point.x, point.y); | ||
| ctx.stroke(); | ||
| } | ||
| }); | ||
| ctx.closePath(); | ||
| }); | ||
| }; | ||
| ctx.clearRect(0, 0, canvas.width, canvas.height); | ||
| linesRef.current.forEach(drawLine); | ||
| }, [drawLine]); | ||
|
|
||
| const resizeCanvas = () => { | ||
| canvas.width = parentRef?.current?.clientWidth ?? window.innerWidth; | ||
| canvas.height = parentRef?.current?.clientHeight ?? window.innerHeight; | ||
| redrawLines(); | ||
| }; | ||
| // Gestion du redimensionnement avec debounce pour optimiser les performances | ||
| const resizeCanvas = useCallback(() => { | ||
| const canvas = canvasRef.current; | ||
| if (!canvas || !parentRef?.current) return; | ||
|
|
||
| window.addEventListener('resize', resizeCanvas); | ||
| resizeCanvas(); | ||
| canvas.width = parentRef.current.clientWidth; | ||
| canvas.height = parentRef.current.clientHeight; | ||
| redrawLines(); | ||
| }, [redrawLines, parentRef]); | ||
|
|
||
| const startDrawing = (e: MouseEvent) => { | ||
| setIsDrawing(true); | ||
| useEffect(() => { | ||
| const canvas = canvasRef.current; | ||
| if (!canvas) return; | ||
|
|
||
| // Ajout des écouteurs d'événements | ||
| const startDrawing = (e: MouseEvent) => { | ||
| isDrawingRef.current = true; | ||
| const rect = canvas.getBoundingClientRect(); | ||
| const x = e.clientX - rect.left; | ||
| const y = e.clientY - rect.top; | ||
| setLines((prevLines) => [...prevLines, [{ x, y }]]); | ||
| linesRef.current.push([{ x, y }]); | ||
| }; | ||
|
|
||
| const draw = (e: MouseEvent) => { | ||
| if (!isDrawing) return; | ||
| const currentLine = lines[lines.length - 1]; | ||
| if (!isDrawingRef.current) return; | ||
| const rect = canvas.getBoundingClientRect(); | ||
| const x = e.clientX - rect.left; | ||
| const y = e.clientY - rect.top; | ||
| const newLine = [...currentLine, { x, y }]; | ||
|
|
||
| setLines((prevLines) => [...prevLines.slice(0, -1), newLine]); | ||
| redrawLines(); | ||
| const currentLine = linesRef.current[linesRef.current.length - 1]; | ||
| currentLine.push({ x, y }); | ||
| drawLine(currentLine); | ||
| }; | ||
|
|
||
| const stopDrawing = () => { | ||
| setIsDrawing(false); | ||
| isDrawingRef.current = false; | ||
| redrawLines(); // Redessine pour s'assurer que tout est cohérent | ||
| }; | ||
|
|
||
| canvas.addEventListener('mousedown', startDrawing); | ||
| canvas.addEventListener('mousemove', draw); | ||
| canvas.addEventListener('mouseup', stopDrawing); | ||
| canvas.addEventListener('mouseleave', stopDrawing); | ||
|
|
||
| window.addEventListener('resize', resizeCanvas); | ||
| resizeCanvas(); // Applique initialement la taille du canvas | ||
|
|
||
| // Nettoyage des écouteurs d'événements | ||
| return () => { | ||
| window.removeEventListener('resize', resizeCanvas); | ||
| canvas.removeEventListener('mousedown', startDrawing); | ||
| canvas.removeEventListener('mousemove', draw); | ||
| canvas.removeEventListener('mouseup', stopDrawing); | ||
| canvas.removeEventListener('mouseleave', stopDrawing); | ||
| window.removeEventListener('resize', resizeCanvas); | ||
| }; | ||
| }, [parentRef, lines, isDrawing]); | ||
| }, [resizeCanvas, drawLine, redrawLines]); | ||
|
|
||
| return [canvasRef, lines] as const; | ||
| return { canvasRef, clearCanvas }; | ||
| }; |
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