def switchChartType(self):
oldChart = self.chart()
if oldChart.chartType() == QChart.ChartTypeCartesian:
newChart = QPolarChart()
else:
newChart = QChart()
seriesList = oldChart.series()
axisList = oldChart.axes()
axisRanges = [(axis.min(), axis.max()) for axis in axisList]
for series in seriesList:
oldChart.removeSeries(series)
for axis in axisList:
oldChart.removeAxis(axis)
if isinstance(newChart, QPolarChart):
newChart.addAxis(axis, QPolarChart.axisPolarOrientation(axis))
else:
newChart.addAxis(axis, axis.alignment())
for series in seriesList:
newChart.addSeries(series)
for axis in axisList:
series.attachAxis(axis)
for (min, max), axis in zip(axisRanges, axisList):
axis.setRange(min, max)
newChart.setTitle(oldChart.title())
self.setChart(newChart)
class QmyMainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent) # 调用父类构造函数，创建窗体
self.ui = Ui_MainWindow() # 创建UI对象
self.ui.setupUi(self) # 构造UI界面
self.setWindowTitle("Demo12_8, 极坐标图")
self.__iniChart() # 创建self.chart
self.__drawRose()
## ==============自定义功能函数========================
def __iniChart(self): #图表初始化
self.chart = QPolarChart() ##极坐标图
self.chart.legend().setVisible(False)
self.ui.chartView.setChart(self.chart)
self.ui.chartView.setRenderHint(QPainter.Antialiasing)
self.ui.chartView.setCursor(Qt.CrossCursor)
self.__axisAngle = QValueAxis() #角度坐标轴
self.__axisAngle.setRange(0, 360) #角度范围
self.__axisAngle.setLabelFormat("NE %.0f")
self.__axisAngle.setTickCount(9)
self.chart.addAxis(self.__axisAngle,
QPolarChart.PolarOrientationAngular)
self.__axisRadial = QValueAxis() #径向坐标轴
self.__axisRadial.setTickCount(6)
self.__axisRadial.setLabelFormat("%.1f") #标签格式
self.chart.addAxis(self.__axisRadial,
QPolarChart.PolarOrientationRadial)
pen = QPen(Qt.blue)
pen.setWidth(2)
seriesSpLine = QSplineSeries()
seriesSpLine.setPen(pen)
seriesSpLine.setPointsVisible(True) #数据点可见
seriesSpLine.hovered.connect(self.do_series_hovered)
self.chart.addSeries(seriesSpLine)
seriesSpLine.attachAxis(self.__axisAngle)
seriesSpLine.attachAxis(self.__axisRadial)
def __drawRose(self):
series0 = self.chart.series()[0]
series0.clear()
theta = 0.0 #角度
delta = 5.0 #角度变化量
R = 10.0 #最大长度
N = self.ui.spinCount.value() #花瓣数
cnt = 1 + math.ceil(360 / delta) #数据点个数
for i in range(cnt):
ang = math.radians(theta) #角度转换为弧度
rho = R * math.cos(N * ang)
series0.append(theta, rho) #数据点：角度,长度
theta = theta + delta
self.__axisRadial.setRange(0, 2 + R)
## ==============event处理函数==========================
## ==========由connectSlotsByName()自动连接的槽函数============
## 工具栏按钮
@pyqtSlot() ##重画曲线
def on_actRedraw_triggered(self):
self.ui.spinAngle_Min.setValue(0)
self.ui.spinAngle_Max.setValue(360)
self.__drawRose()
@pyqtSlot() ##放大
def on_actZoomIn_triggered(self):
self.ui.chartView.chart().zoom(1.2)
@pyqtSlot() ##缩小
def on_actZoomOut_triggered(self):
self.ui.chartView.chart().zoom(0.8)
@pyqtSlot() ##恢复原始大小
def on_actZoomReset_triggered(self):
self.ui.chartView.chart().zoomReset()
##图表外观控制
@pyqtSlot(int) ##主题
def on_comboTheme_currentIndexChanged(self, index):
self.ui.chartView.chart().setTheme(QChart.ChartTheme(index))
@pyqtSlot(bool) ##显示数据点
def on_chkBox_ShowPoints_clicked(self, checked):
series = self.ui.chartView.chart().series()[0]
series.setPointsVisible(checked)
## 角度坐标轴设置
@pyqtSlot(int) ##设置坐标最小值
def on_spinAngle_Min_valueChanged(self, arg1):
self.__axisAngle.setMin(arg1)
@pyqtSlot(int) ##设置坐标最大值
def on_spinAngle_Max_valueChanged(self, arg1):
self.__axisAngle.setMax(arg1)
@pyqtSlot(int) ##分度数
def on_spinAngle_Ticks_valueChanged(self, arg1):
self.__axisAngle.setTickCount(arg1)
## 径向坐标轴设置
@pyqtSlot(int) ##设置坐标范围
def on_spinRadial_Max_valueChanged(self, arg1):
self.__axisRadial.setMax(arg1)
@pyqtSlot(int) ##分度数
def on_spinRadial_Ticks_valueChanged(self, arg1):
self.__axisRadial.setTickCount(arg1)
@pyqtSlot(int) ##花瓣个数
def on_spinCount_valueChanged(self, value):
self.__drawRose()
## 旋转
@pyqtSlot() ##两个相邻点的角度差如果大于180度，就不会直连，而是连接到中心
def on_btnRotate_clicked(self):
dltAng = self.ui.spinRotate.value() #旋转的角度,顺时针方向为正
series0 = self.chart.series()[0] #获取序列
pointCount = len(series0.pointsVector()) #数据点个数
for i in range(pointCount):
pt = series0.pointsVector()[i] #QPointF
ang = pt.x() + dltAng
if ang >= 360:
ang = ang - 360
elif ang < 0:
ang = 360 + ang
series0.replace(i, ang, pt.y())
## =============自定义槽函数===============================
def do_series_hovered(self, point, state):
info = "Series 极径=, 角度="
if state:
info = "Series 极径=%.1f,角度=NE %.1f°" % (point.y(), point.x())
self.ui.statusBar.showMessage(info)
series4.append(ANGULAR_MIN + ad * 2, RADIAL_MAX)
series4.append(ANGULAR_MIN + ad * 3, RADIAL_MIN + rd)
series4.append(ANGULAR_MIN + ad * 4, RADIAL_MAX)
series4.append(ANGULAR_MIN + ad * 5, RADIAL_MIN + rd)
series4.append(ANGULAR_MIN + ad * 6, RADIAL_MAX)
series4.append(ANGULAR_MIN + ad * 7, RADIAL_MIN + rd)
series4.append(ANGULAR_MIN + ad * 8, RADIAL_MAX)
series5 = QAreaSeries()
series5.setName("star area")
series5.setUpperSeries(series3)
series5.setLowerSeries(series4)
series5.setOpacity(0.5)
chart = QPolarChart()
chart.addSeries(series1)
chart.addSeries(series2)
chart.addSeries(series3)
chart.addSeries(series4)
chart.addSeries(series5)
chart.setTitle(
"Use arrow keys to scroll, +/- to zoom, and space to switch chart type.")
angularAxis = QValueAxis()
angularAxis.setTickCount(9)
angularAxis.setLabelFormat('%.1f')
angularAxis.setShadesVisible(True)
angularAxis.setShadesBrush(QBrush(QColor(249, 249, 255)))
chart.addAxis(angularAxis, QPolarChart.PolarOrientationAngular)
radialAxis = QValueAxis()