andy23512 · May 9, 2020 01:09 · May 9, 2020
diff --git a/try_pyqt5.py b/try_pyqt5.py
@@ -0,0 +1,41 @@
+#!/usr/bin/python3
+
+import sys
+from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel
+from PyQt5.QtGui import QPainter, QPen
+from PyQt5.QtCore import QTimer, Qt
+
+class MainWindow(QMainWindow):
+  # constructor
+    def __init__(self):
+        QMainWindow.__init__(self)
+        # counter
+        self.i = 0
+        self.width = 500
+        self.height = 500
+        self.setGeometry(0, 0, self.width, self.height)
+        # make QTimer
+        self.qTimer = QTimer()
+        # set interval to 1 s
+        self.qTimer.setInterval(1000) # 1000 ms = 1 s
+        # connect timeout signal to signal handler
+        self.qTimer.timeout.connect(self.updateCount)
+        # start timer
+        self.qTimer.start()
+
+    def updateCount(self):
+        self.i += 1
+        self.update()
+
+    def paintEvent(self, event):
+        painter = QPainter(self)
+        painter.setPen(QPen(Qt.green,  8, Qt.DashLine))
+        for i in range(self.i):
+            painter.drawEllipse(40 + i * 50, 40, 400, 400)
+
+qApp = QApplication(sys.argv)
+# setup GUI
+qWin = MainWindow()
+qWin.show()
+# run application
+sys.exit(qApp.exec_())