| 158 | # self.step_y = (self.max_y - self.min_y) / (axisY.tickCount() - 1) |
| 159 | |
| 160 | def mouseMoveEvent(self, event): |
| 161 | super(ChartView, self).mouseMoveEvent(event) |
| 162 | # 把鼠标位置所在点转换为对应的xy值 |
| 163 | x = self._chart.mapToValue(event.pos()).x() |
| 164 | y = self._chart.mapToValue(event.pos()).y() |
| 165 | index = round((x - self.min_x) / self.step_x) |
| 166 | # print(x, pos_x, index, index * self.step_x + self.min_x) |
| 167 | # 得到在坐标系中的所有series的类型和点 |
| 168 | points = [(serie, serie.at(index)) |
| 169 | for serie in self._chart.series() if |
| 170 | self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y] |
| 171 | if points: |
| 172 | # 跟随鼠标的黑线条 |
| 173 | self.lineItem.setLine(event.pos().x(), self.point_top.y(), |
| 174 | event.pos().x(), self.point_bottom.y()) |
| 175 | self.lineItem.show() |
| 176 | self.toolTipWidget.show("", points, event.pos() + QPoint(20, 20)) |
| 177 | else: |
| 178 | self.toolTipWidget.hide() |
| 179 | self.lineItem.hide() |
| 180 | |
| 181 | def onSeriesHoverd(self, point, state): |
| 182 | if state: |