numberTable method Null safety

Implementation

Widget numberTable(double widthCM) => _NumberTable(widthCM, this, [
      row([
        cell(text('')),
        cell(text('ERROR', align: bpCenter)),
        cell(list([text('TEST', align: bpCenter)])),
        cell(text('MATRIX', align: bpCenter))
      ]),
      row([
        cell(text('0', align: bpCenter)),
        cell(text(' y \u00f7 0, LN 0, ...')),
        cell(text('x\u200a\u2260\u200a0', align: bpCenter)),
        cell(text(' 0 DIM'))
      ]),
      row([
        cell(text('1', align: bpCenter)),
        cell(text(' LN A , SIN A , ...')),
        cell(text('x\u200a>\u200a0', align: bpCenter)),
        cell(list([
          text(' 1'),
          space(-1),
          arrowRight(2),
          text('R'),
          space(-.5),
          subText('0'),
          space(-.4),
          text(',\u200a1'),
          space(-.8),
          arrowRight(2),
          text('R'),
          space(-.5),
          subText('1')
        ]))
      ]),
      row([
        cell(text('2', align: bpCenter)),
        cell(text(' \u03a3 Error')),
        cell(text('x\u200a<\u200a0', align: bpCenter)),
        cell(list([
          text(' A'),
          space(-.8),
          supText('P'),
          space(-.4),
          arrowRight(2),
          text('A'),
          space(-2.2),
          text('~', offset: const Offset(0, -1.3))
        ]))
      ]),
      row([
        cell(text('3', align: bpCenter)),
        cell(list([
          text(' R?, A'),
          space(-.2),
          text('i\u200aj', scale: 0.8, offset: Offset(0, 0.15 * rowHeightMM)),
          text('?')
        ])),
        cell(text('x\u200a\u2265\u200a0', align: bpCenter)),
        cell(list([
          text(' A'),
          space(-2.4),
          text('~', offset: const Offset(0, -1.3)),
          arrowRight(2),
          space(0.1),
          text('A'),
          space(-.6),
          supText('P')
        ]))
      ]),
      row([
        cell(text('4', align: bpCenter)),
        cell(list([text('LBL?,GTO>MEM,PRGM>MEM'), space(-.9)])),
        cell(text('x\u200a\u2264\u200a0', align: bpCenter)),
        cell(list([text(' A'), space(-.9), supText('T')]))
      ]),
      row([
        cell(text('5', align: bpCenter)),
        cell(list([
          text(' > 7 '),
          text('RTN', boxOffset: const Offset(-.28, -.64), box: true)
        ])),
        cell(text('x\u200a=\u200ay', align: bpCenter)),
        cell(list(
            [text(' A'), space(-.9), supText('T'), space(-.2), text('B')]))
      ]),
      row([
        cell(text('6', align: bpCenter)),
        cell(text(' SF > 9 , CF > 9 , F? > 9')),
        cell(text('x\u200a\u2260\u200ay', align: bpCenter)),
        cell(text(' B = B - AC'))
      ]),
      row([
        cell(text('7', align: bpCenter)),
        cell(list([
          text(' SOLVE(SOLVE), \u222b'),
          space(-1),
          subText('y'),
          space(-1),
          supText('x'),
          text('(\u222b'),
          space(-1),
          subText('y'),
          space(-1),
          supText('x'),
          text(')')
        ])),
        cell(text('x\u200a>\u200ay', align: bpCenter)),
        cell(list([
          space(.5),
          text('MAX', scale: .7, offset: const Offset(0, -1.2)),
          space(-1.85),
          text('i', scale: .6, offset: const Offset(0, .85)),
          space(2.0),
          text('j', scale: .6, offset: const Offset(0, .85)),
          space(-1),
          text('\u03a3', scale: .8, offset: const Offset(0, -0.95)),
          text('|\u200aa', scale: .7, offset: const Offset(0, -1.2)),
          space(-.45),
          text('i\u200aj', scale: .65, offset: const Offset(.2, -0.5)),
          text('|', scale: .7, offset: const Offset(-.2, -1.2)),
        ]))
      ]),
      row([
        cell(text('8', align: bpCenter)),
        cell(text(' SOLVE ?')),
        cell(text('x\u200a<\u200ay', align: bpCenter)),
        cell(list([
          space(0.25),
          text('('),
          space(0.25),
          text('i\u200aj', scale: 0.6, offset: const Offset(0, 1)),
          space(-1.4),
          text('\u03a3', scale: .8, offset: const Offset(0, -0.90)),
          space(-.3),
          text('|\u200aa', scale: .7, offset: const Offset(0, -1.2)),
          space(-.4),
          text('i\u200aj', scale: .65, offset: const Offset(0, -0.5)),
          space(-.14),
          text('|', scale: .7, offset: const Offset(0, -1.2)),
          space(-.1),
          text('2', scale: .4, offset: const Offset(0, -3.8)),
          text(')'),
          space(-.2),
          text('1', scale: .4, offset: const Offset(0, -3.8)),
          space(-.2),
          text('/', scale: .4, offset: const Offset(0, -3.5)),
          space(-.1),
          text('2', scale: .4, offset: const Offset(0, -2.5)),
        ]))
      ]),
      _NumberTableBottomRow([
        cell(text('9', align: bpCenter)),
        cell(list([
          space(.55),
          text('ON', box: true, boxOffset: const Offset(-.28, -.64)),
          text(' / '),
          text('\u00d7',
              box: true,
              offset: const Offset(-.03, -.01),
              boxOffset: const Offset(-.09, -.64))
        ])),
        cell(text('x\u200a\u2265\u200ay', align: bpCenter)),
        cell(text(' |\u200aA\u200a| '))
      ], this),
      _NumberTableBottomRow([
        cell(text('10\u200a', align: bpCenter)),
        cell(text(' DIM > MEM')),
        cell(text('')),
        cell(text(''))
      ], this),
      _NumberTableBottomRow([
        cell(text('11', align: bpCenter)),
        cell(text(' DIM A \u2260 DIM B')),
        cell(text('')),
        cell(text(''))
      ], this),
    ]);