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# DDE support for Boa
# Ripped from PythonWin
# Note DDE requires PythonWin
# Add this code snippet to Boa.py to turn Boa into a dde server
##try:
## import ddeconn
## dde = ddeconn.DDEApp('BoaConstructor', startupModules,
## 'sys.boa_ide.openOrGotoModule(%s)')
## if dde.done:
## print 'Transfered arguments to running Boa, exiting.'
## sys.exit()
##except ImportError:
## pass
from pywin.mfc import object
from dde import *
import traceback
import string
class DDESystemTopic(object.Object):
def __init__(self, app):
self.app = app
object.Object.__init__(self, CreateServerSystemTopic())
def Exec(self, data):
try:
self.app.OnDDECommand(data)
except:
# The DDE Execution failed.
print "Error executing DDE command."
traceback.print_exc()
return 0
class DDEServer(object.Object):
def __init__(self, app):
self.app = app
object.Object.__init__(self, CreateServer())
self.topic = self.item = None
def CreateSystemTopic(self):
return DDESystemTopic(self.app)
def Shutdown(self):
self._obj_.Shutdown()
self._obj_.Destroy()
if self.topic is not None:
self.topic.Destroy()
self.topic = None
if self.item is not None:
self.item.Destroy()
self.item = None
def OnCreate(self):
return 1
def Status(self, msg):
pass
#print 'STATUS', msg
class DDEApp:
def __init__(self, name, args, execStr):
self.args = args
self.svrName = name
self.done = 0
self.execStr = execStr
self.InitDDE()
def MakeExistingDDEConnection(self):
# Use DDE to connect to an existing instance
# Return None if no existing instance
conv = CreateConversation(self.ddeServer)
try:
conv.ConnectTo(self.svrName, "System")
return conv
except error:
return None
def InitDDE(self):
# Do all the magic DDE handling.
self.ddeServer = DDEServer(self)
self.ddeServer.Create(self.svrName, CBF_FAIL_SELFCONNECTIONS )
try:
# If there is an existing instance, pump the arguments to it
dde = self.MakeExistingDDEConnection()
if dde is not None and self.args:
for arg in self.args:
dde.Exec(self.execStr%`arg`)
self.done = 1
except:
print 'ERROR: There was an error during the DDE conversation.'
traceback.print_exc()
def OnDDECommand(self, data):
import sys
exec data
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