reduce calculation
This commit is contained in:
Irony
parent
25d62dbfa5
commit
d1cdca3f2c
2 changed files with 38 additions and 34 deletions
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@ -137,33 +137,35 @@ class ChartView(QChartView):
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self.lineItem = QGraphicsLineItem(self._chart)
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self.lineItem.setZValue(998)
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self.lineItem.hide()
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# 一些固定计算，减少mouseMoveEvent中的计算量
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# 获取x和y轴的最小最大值
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axisX, axisY = self._chart.axisX(), self._chart.axisY()
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self.min_x, self.max_x = axisX.min(), axisX.max()
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self.min_y, self.max_y = axisY.min(), axisY.max()
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# 坐标系中左上角顶点
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self.point_top = self._chart.mapToPosition(QPointF(self.min_x, self.max_y))
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# 坐标原点坐标
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self.point_bottom = self._chart.mapToPosition(QPointF(self.min_x, self.min_y))
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self.step_x = (self.max_x - self.min_x) / (axisX.tickCount() - 1)
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# self.step_y = (self.max_y - self.min_y) / (axisY.tickCount() - 1)
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def mouseMoveEvent(self, event):
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super(ChartView, self).mouseMoveEvent(event)
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# 获取x和y轴的最小最大值
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axisX, axisY = self._chart.axisX(), self._chart.axisY()
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min_x, max_x = axisX.min(), axisX.max()
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min_y, max_y = axisY.min(), axisY.max()
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# 坐标系中左上角顶点
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point_top = self._chart.mapToPosition(QPointF(min_x, max_y))
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# 坐标原点坐标
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point_bottom = self._chart.mapToPosition(QPointF(min_x, min_y))
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step_x = (max_x - min_x) / (axisX.tickCount() - 1)
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# step_y = (max_y - min_y) / (axisY.tickCount() - 1)
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# 把鼠标位置所在点转换为对应的xy值
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x = self._chart.mapToValue(event.pos()).x()
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y = self._chart.mapToValue(event.pos()).y()
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index = round((x - min_x) / step_x)
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index = round((x - self.min_x) / self.step_x)
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pos_x = self._chart.mapToPosition(
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QPointF(index * step_x + min_x, min_y))
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# print(x, pos_x, index, index * step_x + min_x)
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QPointF(index * self.step_x + self.min_x, self.min_y))
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# print(x, pos_x, index, index * self.step_x + self.min_x)
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# 得到在坐标系中的所有series的类型和点
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points = [(serie, serie.at(index))
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for serie in self._chart.series() if min_x <= x <= max_x and min_y <= y <= max_y]
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for serie in self._chart.series() if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y]
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if points:
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# 永远在轴上的黑线条
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self.lineItem.setLine(pos_x.x(), point_top.y(),
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pos_x.x(), point_bottom.y())
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self.lineItem.setLine(pos_x.x(), self.point_top.y(),
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pos_x.x(), self.point_bottom.y())
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self.lineItem.show()
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self.toolTipWidget.show("", points, event.pos() + QPoint(20, 20))
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else:
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@ -176,7 +178,7 @@ class ChartView(QChartView):
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name = self.sender().name()
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except:
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name = ""
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QToolTip.showText(QCursor.pos(), "%s\nx: %s\ny: %s" %
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QToolTip.showText(QCursor.pos(), "%s\nx: %s\ny: %s" %
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(name, point.x(), point.y()))
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def initChart(self):
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@ -6,7 +6,7 @@ Created on 2017年12月23日
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@author: Irony."[讽刺]
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@site: http://alyl.vip, http://orzorz.vip, https://coding.net/u/892768447, https://github.com/892768447
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@email: 892768447@qq.com
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@file: QChartToolTipTest
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@file: ToolTip2
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@description:
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'''
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import sys
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@ -137,31 +137,33 @@ class ChartView(QChartView):
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self.lineItem = QGraphicsLineItem(self._chart)
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self.lineItem.setZValue(998)
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self.lineItem.hide()
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# 一些固定计算，减少mouseMoveEvent中的计算量
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# 获取x和y轴的最小最大值
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axisX, axisY = self._chart.axisX(), self._chart.axisY()
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self.min_x, self.max_x = axisX.min(), axisX.max()
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self.min_y, self.max_y = axisY.min(), axisY.max()
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# 坐标系中左上角顶点
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self.point_top = self._chart.mapToPosition(QPointF(self.min_x, self.max_y))
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# 坐标原点坐标
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self.point_bottom = self._chart.mapToPosition(QPointF(self.min_x, self.min_y))
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self.step_x = (self.max_x - self.min_x) / (axisX.tickCount() - 1)
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# self.step_y = (self.max_y - self.min_y) / (axisY.tickCount() - 1)
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def mouseMoveEvent(self, event):
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super(ChartView, self).mouseMoveEvent(event)
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# 获取x和y轴的最小最大值
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axisX, axisY = self._chart.axisX(), self._chart.axisY()
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min_x, max_x = axisX.min(), axisX.max()
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min_y, max_y = axisY.min(), axisY.max()
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# 坐标系中左上角顶点
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point_top = self._chart.mapToPosition(QPointF(min_x, max_y))
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# 坐标原点坐标
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point_bottom = self._chart.mapToPosition(QPointF(min_x, min_y))
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step_x = (max_x - min_x) / (axisX.tickCount() - 1)
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# step_y = (max_y - min_y) / (axisY.tickCount() - 1)
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# 把鼠标位置所在点转换为对应的xy值
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x = self._chart.mapToValue(event.pos()).x()
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y = self._chart.mapToValue(event.pos()).y()
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index = round((x - min_x) / step_x)
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# print(x, pos_x, index, index * step_x + min_x)
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index = round((x - self.min_x) / self.step_x)
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# print(x, pos_x, index, index * self.step_x + self.min_x)
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# 得到在坐标系中的所有series的类型和点
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points = [(serie, serie.at(index))
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for serie in self._chart.series() if min_x <= x <= max_x and min_y <= y <= max_y]
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for serie in self._chart.series() if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y]
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if points:
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# 跟随鼠标的黑线条
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self.lineItem.setLine(event.pos().x(), point_top.y(),
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event.pos().x(), point_bottom.y())
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self.lineItem.setLine(event.pos().x(), self.point_top.y(),
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event.pos().x(), self.point_bottom.y())
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self.lineItem.show()
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self.toolTipWidget.show("", points, event.pos() + QPoint(20, 20))
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else:
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@ -174,7 +176,7 @@ class ChartView(QChartView):
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name = self.sender().name()
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except:
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name = ""
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QToolTip.showText(QCursor.pos(), "%s\nx: %s\ny: %s" %
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QToolTip.showText(QCursor.pos(), "%s\nx: %s\ny: %s" %
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(name, point.x(), point.y()))
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def initChart(self):
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