Merge pull request #325 from pfafflabatuiuc/merging_appman

Adding the AppManager. Still missing GUI.

plottr/__init__.py

@@ -4,6 +4,7 @@
 import logging
 import os
 import sys
+import signal
 
 if TYPE_CHECKING:
     from PyQt5 import QtCore, QtGui, QtWidgets
@@ -27,6 +28,20 @@
 plottrPath = os.path.split(os.path.abspath(__file__))[0]
 
 
+def qtsleep(delay_sec: float) -> None:
+    """sleep function that allows QT event processing in the background."""
+    loop = QtCore.QEventLoop()
+    QtCore.QTimer.singleShot(int(delay_sec * 1000), loop.quit)
+    loop.exec_()
+
+
+def qtapp() -> QtWidgets.QApplication:
+    """make a QT application that can be interrupted by Ctrl+C in the terminal."""
+    signal.signal(signal.SIGINT, signal.SIG_DFL)
+    app = QtWidgets.QApplication(sys.argv)
+    return app
+
+
 def configPaths() -> Tuple[str, str, str]:
     """Get the folders where plottr looks for config files.