96 lines
3.5 KiB
Markdown
96 lines
3.5 KiB
Markdown
### 把[[matplotlib]]包裝成獨立視窗
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```python
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class Plot2D(Frame):
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def __init__(self, parent, dataCollector, **kwargs):
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Frame.__init__(self, parent.mainWindow, **kwargs)
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self.parent = parent
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self.mainWindows = Toplevel(parent.mainWindow)
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self.mainWindows.title("AF State")
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self.figure = plt.Figure(figsize=(9,5), dpi=100)
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self.figure.suptitle('AF value plot', fontsize=16)
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self.ax = self.figure.add_subplot(111)
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self.canvas = FigureCanvasTkAgg(self.figure, master=self.mainWindows)
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self.canvas.get_tk_widget().pack(fill='both')
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self.axline = None
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self.dataCollector = dataCollector
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self.dataCollector.start()
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def close(self):
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print("Plot2D close")
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self.mainWindows.destroy()
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self.dataCollector.stop()
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self.dataCollector = None
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def draw(self):
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if self.dataCollector:
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datax, datay = self.dataCollector.getPlotData()
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self.ax.clear()
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self.ax.set_xlabel('Last {} datas'.format(self.dataCollector.getDataLength()))
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self.axline, = self.ax.plot(datax, datay)
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self.canvas.draw()
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def getWindow(self):
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return self.mainWindows
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def getLastData(self):
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return self.dataCollector.getLastData()
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```
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其中這一行：
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```python
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self.mainWindows = Toplevel(parent.mainWindow)
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```
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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。
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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：
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```python
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datax, datay = self.dataCollector.getPlotData()
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```
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`DataCollector`的定義如下：
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```python
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class AfStateCollector(threading.Thread):
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def __init__(self, dataLength=100, pollingInterval=0.033):
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threading.Thread.__init__(self)
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self.dataLength = dataLength
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self.pollingInterval = pollingInterval
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self.stopEvent = threading.Event()
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self.data = []
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self.xdata = []
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def run(self):
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while True:
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if self.stopEvent.is_set():
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break
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afValue = self.readAf()
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self.data.append(afValue)
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self.xdata.append(len(self.xdata))
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if len(self.data) > self.dataLength:
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self.data = self.data[-self.dataLength:]
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self.xdata = list(range(self.dataLength))
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# print(f'afValue = {afValue}')
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time.sleep(self.pollingInterval)
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print("AfStateCollector stopped.")
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def readAf(self):
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ReadTestXUreg_cmd = "lvreg testxu read 10"
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ReadTestXUreg_cmd_process = subprocess.Popen(ReadTestXUreg_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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outstring, err = ReadTestXUreg_cmd_process.communicate()
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outstring = outstring.strip().decode('utf-8')
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outstring = int(outstring, 16)
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outstring_H = (outstring & 0xFF00) / 256
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outstring_L = outstring & 0xFF
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outAFStat = int(outstring_L * 256 + outstring_H)
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return outAFStat
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```
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- [Python GUI之tkinter視窗視窗教程大集合（看這篇就夠了） - IT閱讀](https://www.itread01.com/content/1547705544.html)
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- [【Python】改善 VideoCapture 的影像延遲 | 夏恩的程式筆記 - 點部落](https://dotblogs.com.tw/shaynling/2017/12/28/091936)
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- [Displaying a video feed with OpenCV and Tkinter - PyImageSearch](https://www.pyimagesearch.com/2016/05/30/displaying-a-video-feed-with-opencv-and-tkinter/) |