[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_111":112,"_113":114},"routes/embed.x.$handle.$name.$",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":20,"_21":-5},"handle","khxu","name","presentation-survey","path","frontend/components/respond/MatrixInput.tsx","project",{"_22":50,"_11":12,"_35":51,"_52":-5,"_53":44,"_54":55,"_56":55,"_57":58,"_59":-5,"_60":61,"_62":63,"_64":34,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":76,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":88,"_89":90,"_91":92,"_93":44},"file",{"_22":23,"_11":24,"_25":26,"_27":28,"_29":30,"_31":32,"_33":34,"_35":36,"_37":38,"_39":40,"_41":42,"_43":44,"_45":-5,"_13":46},"permalink","https://www.val.town/x/khxu/presentation-survey/code/frontend/components/respond/MatrixInput.tsx","extension","id","2d20f5ea-308a-46e5-8ce8-e6ddf3f55b62","MatrixInput.tsx","fileId","0145575a-ab46-11f1-afc4-1607ee4eb77e","parentId","81ce50f0-68c5-40f5-85c0-81fba0b66c12","branchId","00e09eca-4d1b-4e02-b98f-8565c54b4542","branchVersion",143,"latest",true,"createdAt",["D",1788849922301],"version",4,"fileType","script","content","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport type { KeyboardEvent, PointerEvent } from \"https://esm.sh/react@18.2.0\";\nimport type { MatrixAnswer, Question } from \"../../../shared/types.ts\";\nimport {\n clampMatrixAnswerPosition,\n matrixCellKey,\n normalizeMatrixAnswer,\n} from \"../../../shared/questions.ts\";\nimport {\n MatrixCellAnnotations,\n MatrixReferenceLegend,\n} from \"../MatrixCellReferences.tsx\";\n\ninterface Props {\n q: Question;\n value: unknown;\n onChange: (value: MatrixAnswer) => void;\n}\n\ninterface MatrixBounds {\n left: number;\n top: number;\n width: number;\n height: number;\n}\n\nexport function matrixPositionFromClientPoint(\n clientX: number,\n clientY: number,\n bounds: MatrixBounds,\n): MatrixAnswer {\n if (!bounds.width || !bounds.height) return { x: 0.5, y: 0.5 };\n return {\n x: clampMatrixAnswerPosition((clientX - bounds.left) / bounds.width),\n y: clampMatrixAnswerPosition((clientY - bounds.top) / bounds.height),\n };\n}\n\nexport function moveMatrixPosition(\n current: MatrixAnswer | undefined,\n key: string,\n largeStep = false,\n): MatrixAnswer | null {\n const step = largeStep ? 0.1 : 0.025;\n const offsets: Record = {\n ArrowLeft: [-step, 0],\n ArrowRight: [step, 0],\n ArrowUp: [0, -step],\n ArrowDown: [0, step],\n };\n const offset = offsets[key];\n if (!offset) return null;\n const origin = current ?? { x: 0.5, y: 0.5 };\n return {\n x: clampMatrixAnswerPosition(origin.x + offset[0]),\n y: clampMatrixAnswerPosition(origin.y + offset[1]),\n };\n}\n\nexport function MatrixInput({ q, value, onChange }: Props) {\n const size = q.matrixSize ?? 2;\n const labels = q.matrixAxisLabels ?? {\n left: \"Left\",\n right: \"Right\",\n bottom: \"Bottom\",\n top: \"Top\",\n };\n const references = q.matrixReferences ?? [];\n const subjectLabel = q.matrixSubjectLabel?.trim() || \"Item\";\n const selected = normalizeMatrixAnswer(value, size) ?? undefined;\n\n function updateFromPointer(event: PointerEvent) {\n const bounds = event.currentTarget.getBoundingClientRect();\n onChange(\n matrixPositionFromClientPoint(event.clientX, event.clientY, bounds),\n );\n }\n\n function keyDown(event: KeyboardEvent) {\n const next = moveMatrixPosition(selected, event.key, event.shiftKey);\n if (!next) return;\n event.preventDefault();\n onChange(next);\n }\n\n const markerPosition = selected ?? { x: 0.5, y: 0.5 };\n\n return (\n

\n Drag {subjectLabel}{\" \"}\n into position, or tap anywhere in the grid. Use arrow keys for precise\n adjustments.\n

\n {labels.top}\n

\n {\n event.currentTarget.setPointerCapture(event.pointerId);\n updateFromPointer(event);\n }}\n onPointerMove={(event) => {\n if (event.currentTarget.hasPointerCapture(event.pointerId)) {\n updateFromPointer(event);\n }\n }}\n onPointerUp={(event) => {\n if (event.currentTarget.hasPointerCapture(event.pointerId)) {\n event.currentTarget.releasePointerCapture(event.pointerId);\n }\n }}\n onPointerCancel={(event) => {\n if (event.currentTarget.hasPointerCapture(event.pointerId)) {\n event.currentTarget.releasePointerCapture(event.pointerId);\n }\n }}\n >\n {Array.from({ length: size * size }, (_, index) => {\n const row = Math.floor(index / size);\n const column = index % size;\n const cellReferences = references.filter((reference) =>\n reference.row === row && reference.column === column\n );\n const middleTop = row === size / 2;\n const middleLeft = column === size / 2;\n return (\n \n {cellReferences.length > 0 && (\n \n )}\n

\n );\n })}\n event.currentTarget.focus()}\n aria-label={`${subjectLabel} placement${\n selected\n ? ` at ${\n Math.round(selected.x * 100)\n } percent from the left and ${\n Math.round(selected.y * 100)\n } percent from the top`\n : \", not yet placed\"\n }. Drag, tap the grid, or use arrow keys to position it.`}\n className={`absolute z-30 flex max-w-[44%] -translate-x-1/2 -translate-y-1/2 items-center gap-1.5 rounded-full border-2 px-2.5 py-1.5 text-xs font-bold shadow-lg touch-none focus:outline-none focus:ring-4 focus:ring-indigo-200 sm:text-sm ${\n selected\n ? \"border-indigo-900 bg-indigo-600 text-white cursor-move\"\n : \"border-dashed border-indigo-500 bg-white text-indigo-700 cursor-grab\"\n }`}\n style={{\n left: `${markerPosition.x * 100}%`,\n top: `${markerPosition.y * 100}%`,\n }}\n >\n \n {subjectLabel}\n \n

\n {labels.left}\n {labels.bottom}\n {labels.right}\n

\n \n \n\n {selected\n ? (\n \n {subjectLabel} is {Math.round(selected.x * 100)}% from the left and\n {\" \"}\n {Math.round(selected.y * 100)}% from the top.\n

\n )\n : (\n \n Move the symbol to record your answer.\n

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