/usr/lib/python2.7/dist-packages/sardana/spock/inputhandler.py is in python-sardana 1.6.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | #!/usr/bin/env python
##############################################################################
##
## This file is part of Sardana
##
## http://www.sardana-controls.org/
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Sardana is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Sardana is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Sardana. If not, see <http://www.gnu.org/licenses/>.
##
##############################################################################
"""Spock submodule. It contains an input handler"""
__all__ = ['SpockInputHandler', 'InputHandler']
__docformat__ = 'restructuredtext'
import sys
from multiprocessing import Process, Pipe
from taurus.core import TaurusManager
from taurus.core.util.singleton import Singleton
from taurus.external.qt import Qt
from taurus.qt.qtgui.dialog import TaurusMessageBox, TaurusInputDialog
from sardana.taurus.core.tango.sardana.macroserver import BaseInputHandler
from sardana.spock import genutils
class SpockInputHandler(BaseInputHandler):
def __init__(self):
# don't call super __init__ on purpose
self._input = genutils.spock_input
def input(self, input_data=None):
if input_data is None:
input_data = {}
prompt = input_data.get('prompt')
if 'data_type' in input_data:
if input_data['data_type'] != 'String':
print("Accepted input: %s" % input_data['data_type'])
ret = dict(input=None, cancel=False)
try:
if prompt is None:
ret['input'] = self._input()
else:
ret['input'] = self._input(prompt)
except:
ret['cancel'] = True
return ret
def input_timeout(self, input_data):
print "SpockInputHandler input timeout"
class MessageHandler(Qt.QObject):
def __init__(self, conn, parent=None):
Qt.QObject.__init__(self, parent)
self._conn = conn
self._dialog = None
self.connect(self, Qt.SIGNAL("messageArrived"), self.on_message)
def handle_message(self, input_data):
self.emit(Qt.SIGNAL("messageArrived"), input_data)
def on_message(self, input_data):
msg_type = input_data['type']
if msg_type == 'input':
if 'macro_name' in input_data and 'title' not in input_data:
input_data['title'] = input_data['macro_name']
self._dialog = dialog = TaurusInputDialog(input_data=input_data)
dialog.activateWindow()
dialog.exec_()
ok = dialog.result()
value = dialog.value()
ret = dict(input=None, cancel=False)
if ok:
ret['input'] = value
else:
ret['cancel'] = True
self._conn.send(ret)
elif msg_type == 'timeout':
dialog = self._dialog
if dialog:
dialog.close()
class InputHandler(Singleton, BaseInputHandler):
def __init__(self):
# don't call super __init__ on purpose
pass
def init(self, *args, **kwargs):
self._conn, child_conn = Pipe()
self._proc = proc = Process(target=self.safe_run,
name="SpockInputHandler", args=(child_conn,))
proc.daemon = True
proc.start()
def input(self, input_data=None):
# parent process
data_type = input_data.get('data_type', 'String')
if isinstance(data_type, (str, unicode)):
ms = genutils.get_macro_server()
interfaces = ms.getInterfaces()
if data_type in interfaces:
input_data['data_type'] = [ elem.name for elem in interfaces[data_type].values() ]
self._conn.send(input_data)
ret = self._conn.recv()
return ret
def input_timeout(self, input_data):
# parent process
self._conn.send(input_data)
def safe_run(self, conn):
# child process
try:
return self.run(conn)
except Exception, e:
msgbox = TaurusMessageBox(*sys.exc_info())
conn.send((e, False))
msgbox.exec_()
def run(self, conn):
# child process
self._conn = conn
app = Qt.QApplication.instance()
if app is None:
app = Qt.QApplication([])
app.setQuitOnLastWindowClosed(False)
self._msg_handler = MessageHandler(conn)
TaurusManager().addJob(self.run_forever, None)
app.exec_()
conn.close()
print "Quit input handler"
def run_forever(self):
# child process
message, conn = True, self._conn
while message:
message = conn.recv()
if not message:
continue
self._msg_handler.handle_message(message)
app = Qt.QApplication.instance()
if app:
app.quit()
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