vault backup: 2025-03-04 11:17:00

20.01. Programming/Python/tkinter.md

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+### 把[[matplotlib]]包裝成獨立視窗
+```python
+class Plot2D(Frame):
+    def __init__(self, parent, dataCollector, **kwargs):
+        Frame.__init__(self, parent.mainWindow, **kwargs)
+
+        self.parent = parent
+        self.mainWindows = Toplevel(parent.mainWindow)
+        self.mainWindows.title("AF State")
+        self.figure = plt.Figure(figsize=(9,5), dpi=100)
+        self.figure.suptitle('AF value plot', fontsize=16)
+        self.ax = self.figure.add_subplot(111)
+        self.canvas = FigureCanvasTkAgg(self.figure, master=self.mainWindows)
+        self.canvas.get_tk_widget().pack(fill='both')
+        self.axline = None
+
+        self.dataCollector = dataCollector
+        self.dataCollector.start()
+
+    def close(self):
+        print("Plot2D close")
+        self.mainWindows.destroy()
+        self.dataCollector.stop()
+        self.dataCollector = None
+
+    def draw(self):
+        if self.dataCollector:
+            datax, datay = self.dataCollector.getPlotData()
+            self.ax.clear()
+            self.ax.set_xlabel('Last {} datas'.format(self.dataCollector.getDataLength()))
+            self.axline, = self.ax.plot(datax, datay)
+            self.canvas.draw()
+
+    def getWindow(self):
+        return self.mainWindows
+
+    def getLastData(self):
+        return self.dataCollector.getLastData()
+```
+
+其中這一行：
+```python
+self.mainWindows = Toplevel(parent.mainWindow)
+```
+是用來開一個新的視窗，其中的`parent.mainWindow`就是用`tk.TK()`所產生出來的root。
+
+因為需要一直更新資料，所以需要的一個`DataCollector`來提供資料，`DataCollector`會提供畫圖需要的list，如：
+```python
+datax, datay = self.dataCollector.getPlotData()
+```
+
+`DataCollector`的定義如下：
+```python
+class AfStateCollector(threading.Thread):
+    def __init__(self, dataLength=100, pollingInterval=0.033):
+        threading.Thread.__init__(self)
+        self.dataLength = dataLength
+        self.pollingInterval = pollingInterval
+        self.stopEvent = threading.Event()
+        self.data = []
+        self.xdata = []
+
+    def run(self):
+        while True:
+            if self.stopEvent.is_set():
+                break
+
+            afValue = self.readAf()
+            self.data.append(afValue)
+            self.xdata.append(len(self.xdata))
+            if len(self.data) > self.dataLength:
+                self.data = self.data[-self.dataLength:]
+                self.xdata = list(range(self.dataLength))
+
+            # print(f'afValue = {afValue}')
+            time.sleep(self.pollingInterval)
+
+        print("AfStateCollector stopped.")
+
+    def readAf(self):
+        ReadTestXUreg_cmd = "lvreg testxu read 10"
+        ReadTestXUreg_cmd_process = subprocess.Popen(ReadTestXUreg_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+        outstring, err = ReadTestXUreg_cmd_process.communicate()
+        outstring = outstring.strip().decode('utf-8')
+        outstring = int(outstring, 16)
+        outstring_H = (outstring & 0xFF00) / 256
+        outstring_L = outstring & 0xFF
+        outAFStat = int(outstring_L * 256 + outstring_H)
+
+        return outAFStat
+```
+
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