qt 自定义控件

qt 自定义控件

make cell 功能 toolButton 的样式：

Qt::Alignment alignments[9] = {
Qt::AlignTop | Qt::AlignLeft,       Qt::AlignTop | Qt::AlignHCenter,        Qt::AlignTop | Qt::AlignRight,
Qt::AlignVCenter | Qt::AlignLeft,   Qt::AlignCenter,                        Qt::AlignVCenter | Qt::AlignRight,
Qt::AlignBottom | Qt::AlignLeft,    Qt::AlignBottom | Qt::AlignHCenter,     Qt::AlignBottom | Qt::AlignRight,
};
QPixmap skiMakeCellForm::createDotPixmap(Qt::Alignment align) {
  QPixmap pixmap(btnSize, btnSize);
  pixmap.fill(Qt::transparent);

  QPainter painter(&pixmap);
  painter.setPen(QPen(Qt::black, 1));

  int dotRadius = 3;
  QPoint center;

  int w = pixmap.width();
  int h = pixmap.height();

  // 矩形边距
  int edge = 1;
  QRect boxRect(edge, edge, w - edge * 2, h - edge * 2); // 24x24 正方形

  // 先画一个矩形框
  painter.drawRect(boxRect);

  // 计算小圆点中心
  if (align & Qt::AlignLeft) center.setX(boxRect.left());
  else if (align & Qt::AlignHCenter) center.setX(boxRect.center().x());
  else if (align & Qt::AlignRight) center.setX(boxRect.right());

  if (align & Qt::AlignTop) center.setY(boxRect.top());
  else if (align & Qt::AlignVCenter) center.setY(boxRect.center().y());
  else if (align & Qt::AlignBottom) center.setY(boxRect.bottom());

  // 延伸线段
  int lineLength = 2;
  painter.drawLine(center.x(), center.y() - dotRadius,
                    center.x() center.y() - dotRadius - lineLength); // 上

  painter.drawLine(center.x(), center.y() + dotRadius,
                    center.x(), center.y() + dotRadius + lineLength); // 下

  painter.drawLine(center.x() - dotRadius, center.y(),
                    center.x() - dotRadius - lineLength, center.y()); // 左

  painter.drawLine(center.x() + dotRadius, center.y(),
                    center.x() + dotRadius + lineLength, center.y()); // 右

  // 画小圆点
  painter.setBrush(Qt::white);
  painter.drawEllipse(center, dotRadius, dotRadius);

  return pixmap;
}