Prevent 2 instances of the same version starting on windows, and instead load the...

diff --git a/Cura/gui/app.py b/Cura/gui/app.py
index 3861dbc14d6efd13de58722d8683b61997c421c5..e557c2eca61b2e10a3eea9e5e6143afd5962e23a 100644 (file)
--- a/Cura/gui/app.py
+++ b/Cura/gui/app.py
@@ -22,6 +22,27 @@ class CuraApp(wx.App):
                self.mainWindow = None
                self.splash = None
                self.loadFiles = files
+               
+               if sys.platform.startswith('win') and len(files) > 0:
+                       #Check for an already running instance, if another instance is running load files in there
+                       from Cura.util import version
+                       from ctypes import windll
+                       import ctypes
+                       import socket
+                       import threading
+
+                       other_hwnd = windll.user32.FindWindowA(None, ctypes.c_char_p('Cura - ' + version.getVersion()))
+                       portNr = 0xCA00 + sum(map(ord, version.getVersion(False)))
+                       if other_hwnd != 0:
+                               sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+                               sock.sendto('\0'.join(files), ("127.0.0.1", portNr))
+
+                               windll.user32.SetForegroundWindow(other_hwnd)
+                               return
+
+                       socketListener = threading.Thread(target=self.Win32SocketListener, args=(portNr,))
+                       socketListener.daemon = True
+                       socketListener.start()
 
                if sys.platform.startswith('darwin'):
                        #Do not show a splashscreen on OSX, as by Apple guidelines
@@ -36,6 +57,14 @@ class CuraApp(wx.App):
                except Exception as e:
                        warnings.warn("File at {p} cannot be read: {e}".format(p=path, e=str(e)))
 
+       def Win32SocketListener(self, port):
+               import socket
+               sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+               sock.bind(("127.0.0.1", port))
+               while True:
+                       data, addr = sock.recvfrom(2048)
+                       self.mainWindow.OnDropFiles(data.split('\0'))
+
        def afterSplashCallback(self):
                #These imports take most of the time and thus should be done after showing the splashscreen
                import webbrowser