| 106 | class ChartView(QChartView): |
| 107 | |
| 108 | def __init__(self, *args, **kwargs): |
| 109 | super(ChartView, self).__init__(*args, **kwargs) |
| 110 | self.resize(800, 600) |
| 111 | self.setRenderHint(QPainter.Antialiasing) # 抗锯齿 |
| 112 | self.initChart() |
| 113 | |
| 114 | # 提示widget |
| 115 | self.toolTipWidget = GraphicsProxyWidget(self._chart) |
| 116 | |
| 117 | # line 宽度需要调整 |
| 118 | self.lineItem = QGraphicsLineItem(self._chart) |
| 119 | pen = QPen(Qt.gray) |
| 120 | self.lineItem.setPen(pen) |
| 121 | self.lineItem.setZValue(998) |
| 122 | self.lineItem.hide() |
| 123 | |
| 124 | # 一些固定计算，减少mouseMoveEvent中的计算量 |
| 125 | # 获取x和y轴的最小最大值 |
| 126 | axisX, axisY = self._chart.axisX(), self._chart.axisY() |
| 127 | self.category_len = len(axisX.categories()) |
| 128 | self.min_x, self.max_x = -0.5, self.category_len - 0.5 |
| 129 | self.min_y, self.max_y = axisY.min(), axisY.max() |
| 130 | # 坐标系中左上角顶点 |
| 131 | self.point_top = self._chart.mapToPosition( |
| 132 | QPointF(self.min_x, self.max_y)) |
| 133 | |
| 134 | def mouseMoveEvent(self, event): |
| 135 | super(ChartView, self).mouseMoveEvent(event) |