使用pyqt 显示控件实现曲线的绘制
代码中brain_node_disk_session 为我项目中需要显示的数据源，自行替换。
class XchartView(QWidget):
def __init__(self,brain_node_disk_session):
super(XchartView, self).__init__()
self.brain_node_disk_session = brain_node_disk_session
main_layout =QVBoxLayout()
comb_box =QHBoxLayout()
self.combox1 = QComboBox()
self.combox2 = QComboBox()
self.combox1.addItems(utils_ui_list_sig)
self.combox2.addItems(utils_ui_list_sig)
self.combox1.setStyleSheet("QWidget{color:red}")#color
self.combox2.setStyleSheet("QWidget{color:green}")
comb_box.addWidget(self.combox1)
comb_box.addWidget(self.combox2)
self.win_charts_sensor = pyqtgraph.GraphicsLayoutWidget(show=True)
self.label = pyqtgraph.LabelItem(justify='right')
self.win_charts_sensor.addItem(self.label)
self.win_charts_sensor.nextRow()
# self.win_charts_sensor = pyqtgraph.PlotWidget()
self.p1 = self.win_charts_sensor.addPlot()#(title="value")
# self.p1 = self.win_charts_sensor.plotItem
#self.p1.setLabels(left='axis 1')
self.p2 = pyqtgraph.ViewBox()
self.p1.showAxis('right')
self.p1.scene().addItem(self.p2)
self.p1.getAxis('right').linkToView(self.p2)
self.p2.setXLink(self.p1)
#self.p1.getAxis('right').setLabel('axis2', color='#0000ff')
# self.label.setGeometry(QRectF(0, 0, 100, 100))
self.vLine = pyqtgraph.InfiniteLine(angle=90, movable=False)
self.hLine = pyqtgraph.InfiniteLine(angle=0, movable=False)
#self.curpose_Line = pyqtgraph.InfiniteLine(angle=90, movable=False)#current slide position
self.p1.addItem(self.vLine, ignoreBounds=True)
self.p1.addItem(self.hLine, ignoreBounds=True)
#self.p1.addItem(self.curpose_Line, ignoreBounds=True)
self.vb = self.p1.vb
main_layout.addLayout(comb_box)
main_layout.addWidget(self.win_charts_sensor)
main_layout.setContentsMargins(0, 0, 0, 0)
self.setLayout(main_layout)
self.combox1_data = []
self.combox2_data = []
self.curve1 = self.p1.plot(self.combox1_data, pen="r")
self.p2.addItem(pyqtgraph.PlotCurveItem(self.combox2_data, pen='g'))
self.combox1.currentIndexChanged[int].connect(self.update_comb1)
self.combox2.currentIndexChanged[int].connect(self.update_comb2)
self.ts = 0
self.timer_init()
self.index1_choose = None
self.index2_choose = None
def timer_init(self):
#使用QTimer，2秒触发一次，更新数据
self.timer = QTimer(self)
self.timer.timeout.connect(self.drawLine)
self.timer.start(200)
def drawLine(self):
# print("self.index1_choose,self.index2_choose:",self.index1_choose,self.index2_choose)
if self.index1_choose != None and self.index2_choose != None:
self.combox1_data = np.array(self.get_val_from_str(utils_ui_list_sig[self.index1_choose]))
self.combox2_data = np.array(self.get_val_from_str(utils_ui_list_sig[self.index2_choose]))
elif self.index1_choose == None and self.index2_choose != None:
self.combox1_data = []
self.combox2_data = np.array(self.get_val_from_str(utils_ui_list_sig[self.index2_choose]))
elif self.index1_choose != None and self.index2_choose == None:
self.combox1_data = np.array(self.get_val_from_str(utils_ui_list_sig[self.index1_choose]))
self.combox2_data = []
else:
self.combox1_data = []
self.combox2_data = []
# print("self.combox1_data's length:",len(self.combox1_data))
self.curve1.setData(self.combox1_data)
self.p2.addItem(pyqtgraph.PlotCurveItem(self.combox2_data, pen='g'))
def update_comb1(self, index):
self.index1_choose = index
self.combox1_data = []
self.curve1.setData(self.combox1_data)
self.combox1_data = np.array(self.get_val_from_str(utils_ui_list_sig[index]))
if np.any(self.combox1_data) :
self.curve1.setData(self.combox1_data)
else:
print("self.combox2_data is null")
self.proxy = pyqtgraph.SignalProxy(self.p1.scene().sigMouseMoved, rateLimit=60, slot=self.mouseMoved)
def update_comb2(self, index):
self.index2_choose = index
self.p2.setGeometry(self.p1.vb.sceneBoundingRect())
self.p2.linkedViewChanged(self.p1.vb, self.p2.XAxis)
self.combox2_data = []
self.p2.clear()
self.combox2_data = np.array(self.get_val_from_str(utils_ui_list_sig[index]))
# self.curve2 = self.plot_view_v1.plot(self.combox2_data, pen="g")
if np.any(self.combox2_data):
self.p2.addItem(pyqtgraph.PlotCurveItem(self.combox2_data, pen='g'))
else:
print("self.combox2_data is null")
self.proxy = pyqtgraph.SignalProxy(self.p1.scene().sigMouseMoved, rateLimit=60, slot=self.mouseMoved)
def mouseMoved(self,evt):
pos = evt[0] ## using signal proxy turns original arguments into a tuple
if self.p1.sceneBoundingRect().contains(pos):
mousePoint = self.vb.mapSceneToView(pos)
mouse_index = int(mousePoint.x())
combox1_data_str, combox2_data_str = self.get_cur_combox_value(mouse_index)
try:
self.ts = self.brain_node_disk_session.data_lidar.timestamps[mouse_index]/1000
except:
self.ts = self.brain_node_disk_session.data_lidar.timestamps[-1] / 1000
# print("ts:",self.ts)
self.label.setText(
"<span style='font-size: 10pt'>ts=%s, <span style='font-size: 10pt'>x=%0.3f, <span style='color: red'>y1=%s</span>, <span style='color: green'>y2=%s</span>" % (
time_convert(self.ts), mouse_index, combox1_data_str, combox2_data_str))
self.vLine.setPos(mousePoint.x())
self.hLine.setPos(mousePoint.y())
def set_p(self,pos_index):
mouse_index = pos_index
self.vLine.setPos(pos_index)
combox1_data_str, combox2_data_str=self.get_cur_combox_value(mouse_index)
self.ts = self.brain_node_disk_session.data_imu.timestamps[pos_index]/1000
self.label.setText(
"<span style='font-size: 10pt'>ts=%s, <span style='font-size: 10pt'>x=%0.3f, <span style='color: red'>y1=%s</span>, <span style='color: green'>y2=%s</span>" % (
time_convert(self.ts),mouse_index, combox1_data_str, combox2_data_str))
def get_cur_combox_value(self,mouse_index):
len_comb1 = len(self.combox1_data)
len_comb2 = len(self.combox2_data)
if len_comb1 > 0 and mouse_index > 0 and mouse_index < len_comb1:
combox1_data_str = '{:.3f}'.format(self.combox1_data[mouse_index])
else:
combox1_data_str = '_'
if len_comb2 > 0 and mouse_index > 0 and mouse_index < len_comb2:
combox2_data_str = '{:.3f}'.format(self.combox2_data[mouse_index])
else:
combox2_data_str = '_'
return combox1_data_str,combox2_data_str
def set_y_range(self, up, down):
self.p1.setRange(yRange=(down,up))
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