kindle manager

tthread.py

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+
+import sys
+import pyqtgraph as pg
+from PyQt5.QtGui import *
+from PyQt5.QtWidgets import *
+from PyQt5.QtCore import QThread, pyqtSignal, QTimer
+import numpy as np
+
+class PlotSin(QThread):
+
+    # 定义信号，self.y 是 numpy.array，所以信号数据类型为 object
+    signal = pyqtSignal(object)
+
+    def __init__(self, parent=None):
+        super().__init__()
+        self.y = None
+        self.phase = 0
+
+    def sin(self):
+        self.x = np.arange(0, 3.0, 0.01)
+        self.y = np.sin(2 * np.pi * self.x + self.phase)
+        self.phase += 0.1
+        QThread.msleep(200) # 等待200毫秒
+
+    def run(self):
+        for _ in range(300):
+            self.sin()
+            self.signal.emit(self.y) # 向连接槽发射信号 self.y
+
+class PlotSin_MainWindow(QDialog):
+
+    def __init__(self):
+        super().__init__()        
+        self.initUI()
+        self.clock_time = 0
+        self.timer = QTimer(self) # 生成定时器
+        self.timer.timeout.connect(self.clock) # 绑定计时函数 self.clock
+
+    def initUI(self):           
+
+        self.creatContorls("时间显示：")
+        self.creatResult("函数绘制：")
+
+        layout = QHBoxLayout()
+        layout.addWidget(self.controlsGroup)
+        layout.addWidget(self.resultGroup)
+        self.setLayout(layout)
+        self.beginButton.clicked.connect(self.clock_begin)
+        self.setGeometry(300, 300, 600, 300)
+        self.setWindowTitle('Plot Sine')
+        self.show()
+
+    def creatContorls(self,title):
+        self.controlsGroup = QGroupBox(title)
+        self.beginButton  = QPushButton("开始")
+        numberLabel = QLabel("运行时间：")
+        self.clockLabel = QLabel("")
+        controlsLayout = QGridLayout()
+        controlsLayout.addWidget(numberLabel, 0, 0)
+        controlsLayout.addWidget(self.clockLabel, 0, 1)
+        controlsLayout.addWidget(self.beginButton, 3, 0)
+        self.controlsGroup.setLayout(controlsLayout)
+
+    def creatResult(self,title):
+        self.resultGroup = QGroupBox(title)
+        self.guiplot = pg.PlotWidget()
+        gridLayout = QGridLayout()
+        gridLayout.addWidget(self.guiplot,0,2,2,3)
+        self.resultGroup.setLayout(gridLayout)
+
+    def clock_begin(self):
+        if not self.timer.isActive():
+            self.recorder_thread = PlotSin() 
+            self.recorder_thread.signal.connect(self.displaySin) # 绑定信号槽函数
+            self.recorder_thread.start() # 线程执行
+            self.clock()
+            self.timer.start(1000)
+        else:
+            self.beginButton.setText("开始")
+            self.clockLabel.setText("")
+            self.recorder_thread.terminate() # 终止线程
+            self.timer.stop() # 终止定时器
+            self.clock_time = 0
+            text = str(self.clock_time) + "s"
+            self.clockLabel.setText(text)
+
+    def clock(self):
+        text = str(self.clock_time) + "s"
+        self.clockLabel.setText(text)
+        if self.clock_time == 0:
+            self.beginButton.setText("结束")
+            
+        self.clock_time += 1
+
+    def plotSin(self, y):
+        self.guiplot.clear()
+        self.guiplot.plot(y)
+
+    def displaySin(self, y):
+        self.plotSin(y)
+
+if __name__ == '__main__':
+    app = QApplication(sys.argv)
+    window = PlotSin_MainWindow()
+    window.show()
+    sys.exit(app.exec_())