jazzycamel · September 28, 2024 08:06 · Jul 12, 2024 · Jul 12, 2024 · Feb 11, 2016 · Feb 11, 2016
diff --git a/threads1.py b/threads1.py
@@ -1,4 +1,4 @@
-# Copyright (c) <year> Rob Kent (jazzycamel)
+# Copyright (c) 2016 Rob Kent (jazzycamel)
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 # and associated documentation files (the "Software"), to deal in the Software without restriction, 

diff --git a/threads1.py b/threads1.py
@@ -1,3 +1,19 @@
+# Copyright (c) <year> Rob Kent (jazzycamel)
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+# and associated documentation files (the "Software"), to deal in the Software without restriction, 
+# including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+# sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all copies or 
+# substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT 
+# NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 from PyQt5.QtCore import *
 from PyQt5.QtWidgets import *
 from itertools import count, islice

diff --git a/threads1.py b/threads1.py
@@ -3,7 +3,6 @@
 from itertools import count, islice
 
 class Threaded(QObject):
-    heartbeat=pyqtSignal()
     result=pyqtSignal(int)
 
     def __init__(self, parent=None, **kwargs):

diff --git a/threads1.py b/threads1.py
@@ -28,6 +28,7 @@ def __init__(self, parent=None, **kwargs):
         self.requestPrime.connect(self._threaded.calculatePrime)
         self._thread.started.connect(self._threaded.start)
         self._threaded.moveToThread(self._thread)
+        qApp.aboutToQuit.connect(self._thread.quit)
         self._thread.start()
 
         l=QVBoxLayout(self)

diff --git a/threads1.py b/threads1.py
@@ -0,0 +1,66 @@
+from PyQt5.QtCore import *
+from PyQt5.QtWidgets import *
+from itertools import count, islice
+
+class Threaded(QObject):
+    heartbeat=pyqtSignal()
+    result=pyqtSignal(int)
+
+    def __init__(self, parent=None, **kwargs):
+        super().__init__(parent, **kwargs)
+
+    @pyqtSlot()
+    def start(self): print("Thread started")
+
+    @pyqtSlot(int)
+    def calculatePrime(self, n):
+        primes=(n for n in count(2) if all(n % d for d in range(2, n)))
+        self.result.emit(list(islice(primes, 0, n))[-1])
+
+class GUI(QWidget):
+    requestPrime=pyqtSignal(int)
+
+    def __init__(self, parent=None, **kwargs):
+        super().__init__(parent, **kwargs)
+
+        self._thread=QThread()
+        self._threaded=Threaded(result=self.displayPrime)
+        self.requestPrime.connect(self._threaded.calculatePrime)
+        self._thread.started.connect(self._threaded.start)
+        self._threaded.moveToThread(self._thread)
+        self._thread.start()
+
+        l=QVBoxLayout(self)
+        self._iterationLE=QLineEdit(self, placeholderText="Iteration (n)")
+        l.addWidget(self._iterationLE)
+        self._requestBtn=QPushButton(
+            "Calculate Prime", self, clicked=self.primeRequested)
+        l.addWidget(self._requestBtn)
+        self._busy=QProgressBar(self)
+        l.addWidget(self._busy)
+        self._resultLbl=QLabel("Result:", self)
+        l.addWidget(self._resultLbl)
+
+    @pyqtSlot()
+    def primeRequested(self):
+        try: n=int(self._iterationLE.text())
+        except: return
+        self.requestPrime.emit(n)
+        self._busy.setRange(0,0)
+        self._iterationLE.setEnabled(False)
+        self._requestBtn.setEnabled(False)
+
+    @pyqtSlot(int)
+    def displayPrime(self, prime):
+        self._resultLbl.setText("Result: {}".format(prime))
+        self._busy.setRange(0,100)
+        self._iterationLE.setEnabled(True)
+        self._requestBtn.setEnabled(True)
+
+if __name__=="__main__":
+    from sys import exit, argv
+
+    a=QApplication(argv)
+    g=GUI()
+    g.show()
+    exit(a.exec_())