feat: freehand drawing capability and card layout improvements and v0.2.29 release (#180)

components/DrawingDisplay.tsx

@@ -0,0 +1,113 @@
+'use client'
+
+import { useEffect, useRef } from 'react'
+
+interface DrawingDisplayProps {
+  drawingData?: string
+  width?: number
+  height?: number
+  className?: string
+}
+
+interface DrawingStroke {
+  color: string
+  thickness: number
+  points: Array<{ x: number; y: number }>
+}
+
+export default function DrawingDisplay({
+  drawingData,
+  width = 120,
+  height = 80,
+  className = ''
+}: DrawingDisplayProps) {
+  const canvasRef = useRef<HTMLCanvasElement>(null)
+
+  useEffect(() => {
+    const canvas = canvasRef.current
+    if (!canvas || !drawingData) return
+
+    const context = canvas.getContext('2d')
+    if (!context) return
+
+    try {
+      const strokes: DrawingStroke[] = JSON.parse(drawingData)
+
+      // Clear canvas
+      context.clearRect(0, 0, canvas.width, canvas.height)
+
+      // Set up context for drawing
+      context.lineCap = 'round'
+      context.lineJoin = 'round'
+
+      // Calculate scaling to fit the drawing in the small canvas
+      if (strokes.length === 0) return
+
+      // Find bounds of the drawing
+      let minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity
+
+      strokes.forEach(stroke => {
+        stroke.points.forEach(point => {
+          minX = Math.min(minX, point.x)
+          minY = Math.min(minY, point.y)
+          maxX = Math.max(maxX, point.x)
+          maxY = Math.max(maxY, point.y)
+        })
+      })
+
+      // Add padding
+      const padding = 10
+      const drawingWidth = maxX - minX + padding * 2
+      const drawingHeight = maxY - minY + padding * 2
+
+      // Calculate scale to fit in canvas
+      const scaleX = canvas.width / drawingWidth
+      const scaleY = canvas.height / drawingHeight
+      const scale = Math.min(scaleX, scaleY, 1) // Don't scale up
+
+      // Center the drawing
+      const offsetX = (canvas.width - drawingWidth * scale) / 2 - (minX - padding) * scale
+      const offsetY = (canvas.height - drawingHeight * scale) / 2 - (minY - padding) * scale
+
+      // Draw each stroke
+      strokes.forEach(stroke => {
+        if (stroke.points.length === 0) return
+
+        context.beginPath()
+        context.strokeStyle = stroke.color
+        context.lineWidth = Math.max(1, stroke.thickness * scale) // Ensure minimum line width
+
+        const firstPoint = stroke.points[0]
+        context.moveTo(
+          firstPoint.x * scale + offsetX,
+          firstPoint.y * scale + offsetY
+        )
+
+        stroke.points.forEach(point => {
+          context.lineTo(
+            point.x * scale + offsetX,
+            point.y * scale + offsetY
+          )
+        })
+
+        context.stroke()
+      })
+    } catch (error) {
+      console.warn('Failed to render drawing:', error)
+    }
+  }, [drawingData, width, height])
+
+  if (!drawingData) {
+    return null
+  }
+
+  return (
+    <canvas
+      ref={canvasRef}
+      width={width}
+      height={height}
+      className={`border-2 border-muted-foreground rounded bg-white ${className}`}
+      style={{ width: `${width}px`, height: `${height}px` }}
+    />
+  )
+}