| 132 | QPointF(self.min_x, self.max_y)) |
| 133 | |
| 134 | def mouseMoveEvent(self, event): |
| 135 | super(ChartView, self).mouseMoveEvent(event) |
| 136 | pos = event.pos() |
| 137 | # 把鼠标位置所在点转换为对应的xy值 |
| 138 | x = self._chart.mapToValue(pos).x() |
| 139 | y = self._chart.mapToValue(pos).y() |
| 140 | index = round(x) |
| 141 | # 得到在坐标系中的所有bar的类型和点 |
| 142 | serie = self._chart.series()[0] |
| 143 | bars = [(bar, bar.at(index)) |
| 144 | for bar in serie.barSets() if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y] |
| 145 | # print(bars) |
| 146 | if bars: |
| 147 | right_top = self._chart.mapToPosition( |
| 148 | QPointF(self.max_x, self.max_y)) |
| 149 | # 等分距离比例 |
| 150 | step_x = round( |
| 151 | (right_top.x() - self.point_top.x()) / self.category_len) |
| 152 | posx = self._chart.mapToPosition(QPointF(x, self.min_y)) |
| 153 | self.lineItem.setLine(posx.x(), self.point_top.y(), |
| 154 | posx.x(), posx.y()) |
| 155 | self.lineItem.show() |
| 156 | try: |
| 157 | title = self.categories[index] |
| 158 | except: |
| 159 | title = "" |
| 160 | t_width = self.toolTipWidget.width() |
| 161 | t_height = self.toolTipWidget.height() |
| 162 | # 如果鼠标位置离右侧的距离小于tip宽度 |
| 163 | x = pos.x() - t_width if self.width() - \ |
| 164 | pos.x() - 20 < t_width else pos.x() |
| 165 | # 如果鼠标位置离底部的高度小于tip高度 |
| 166 | y = pos.y() - t_height if self.height() - \ |
| 167 | pos.y() - 20 < t_height else pos.y() |
| 168 | self.toolTipWidget.show( |
| 169 | title, bars, QPoint(x, y)) |
| 170 | else: |
| 171 | self.toolTipWidget.hide() |
| 172 | self.lineItem.hide() |
| 173 | |
| 174 | def handleMarkerClicked(self): |
| 175 | marker = self.sender() # 信号发送者 |