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Reopen GUI window if launcher script is executed a second time. #20

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Reopen GUI window if launcher script is executed a second time. #20

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8b093fe
Reopen GUI window if launcher script is executed a second time.
studersi Oct 6, 2015
ac47406
Add shebang.
studersi Oct 6, 2015
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38 changes: 36 additions & 2 deletions gui/gui.py
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Original file line number Diff line number Diff line change
@@ -1,7 +1,9 @@
import sys, os, thread, time, string, threading, subprocess
#!/usr/bin/env python

import sys, os, thread, time, string, threading, subprocess, signal
from PyQt4.QtGui import QApplication, QStandardItem, QDialog, QIcon, QMenu, QSystemTrayIcon, QStandardItemModel, QAction, QMainWindow, QListWidget, QListWidgetItem, QWidget, QIntValidator, QStyledItemDelegate, QPainter, QStyleOptionViewItem, QFont, QTableWidgetItem, QPalette, QColor, QSortFilterProxyModel
import resource
from PyQt4.QtCore import pyqtSignal, Qt, QModelIndex, QRect, pyqtSlot, QVariant, QString
from PyQt4.QtCore import pyqtSignal, Qt, QModelIndex, QRect, pyqtSlot, QVariant, QString, QTimer
from PyQt4.QtNetwork import QHostInfo
from multiprocessing import Pipe, Process, Lock
from base64 import b64encode, b64decode
Expand Down Expand Up @@ -493,10 +495,34 @@ def lessThan(self, left, right):
elif (sys.argv[1] != "debug"):
import wingdbstub

# handle pid file
fname = os.path.expanduser("~/.lpfw.pid")
if os.path.isfile(fname):
f = open(fname,'r')
pid = int(f.readline())
f.close()
# check if process still exists
if os.path.exists("/proc/%s" % pid):
os.kill(pid, signal.SIGUSR1)
exit(0)
else:
f = open(fname,'w')
f.write("%s" % os.getpid())
f.close()
else:
f = open(fname,'w')
f.write("%s" % os.getpid())
f.close()

app=QApplication(sys.argv)
app.setQuitOnLastWindowClosed(False)
window = myMainWindow()

# run interpreter from time to time (to catch signals)
timer = QTimer()
timer.start(1000)
timer.timeout.connect(lambda: None)

tray = QSystemTrayIcon(QIcon(":/pics/pic24.png"))
menu = QMenu()
actionShow = QAction("Show Leopard Flower",menu)
Expand Down Expand Up @@ -535,4 +561,12 @@ def lessThan(self, left, right):
thread.start()

window.show()

# handler for system signal
def reopen_window(signum, stack):
window.show()

# attach SIGUSR1 to handler
signal.signal(signal.SIGUSR1, reopen_window)

sys.exit(app.exec_())