def __init__(self, parent=None, pvname=''):
QtGui.QWidget.__init__(self, parent)
name_label = QtGui.QLabel("PV Name:")
self.pvname = QtGui.QLineEdit(pvname)
self.pvname.returnPressed.connect(self.onPVNameReturn)
#self.pvname.editingFinished.connect(self.onPVNameReturn)
value_label = QtGui.QLabel("PV Value:")
self.value = CaQLabel()
status_label = QtGui.QLabel("status:")
self.status = QtGui.QLabel("just starting")
self.status_text = ''
content_label = QtGui.QLabel("content:")
self.content = QtGui.QLabel("just starting")
self.content_text = ''
self.sig_status = CaQSignalDef()
self.sig_status.newText.connect(self.SetStatus)
self.sig_content = CaQSignalDef()
self.sig_content.newText.connect(self.SetContent)
grid = QtGui.QGridLayout()
grid.addWidget(name_label, 0, 0)
grid.addWidget(self.pvname, 0, 1)
grid.addWidget(value_label, 1, 0)
grid.addWidget(self.value, 1, 1)
grid.addWidget(status_label, 2, 0)
grid.addWidget(self.status, 2, 1)
grid.addWidget(content_label, 3, 0)
grid.addWidget(self.content, 3, 1)
self.setLayout(grid)
self.setWindowTitle("Demo PV object")
if len(pvname)>0:
self.onPVNameReturn()
class DemoView(QtGui.QWidget):
'''
Show an EPICS PV connection.
Allow it to connect and disconnect.
This is a variation of EPICS PV Probe.
'''
def __init__(self, parent=None, pvname=''):
QtGui.QWidget.__init__(self, parent)
name_label = QtGui.QLabel("PV Name:")
self.pvname = QtGui.QLineEdit(pvname)
self.pvname.returnPressed.connect(self.onPVNameReturn)
#self.pvname.editingFinished.connect(self.onPVNameReturn)
value_label = QtGui.QLabel("PV Value:")
self.value = CaQLabel()
status_label = QtGui.QLabel("status:")
self.status = QtGui.QLabel("just starting")
self.status_text = ''
content_label = QtGui.QLabel("content:")
self.content = QtGui.QLabel("just starting")
self.content_text = ''
self.sig_status = CaQSignalDef()
self.sig_status.newText.connect(self.SetStatus)
self.sig_content = CaQSignalDef()
self.sig_content.newText.connect(self.SetContent)
grid = QtGui.QGridLayout()
grid.addWidget(name_label, 0, 0)
grid.addWidget(self.pvname, 0, 1)
grid.addWidget(value_label, 1, 0)
grid.addWidget(self.value, 1, 1)
grid.addWidget(status_label, 2, 0)
grid.addWidget(self.status, 2, 1)
grid.addWidget(content_label, 3, 0)
grid.addWidget(self.content, 3, 1)
self.setLayout(grid)
self.setWindowTitle("Demo PV object")
if len(pvname)>0:
self.onPVNameReturn()
def onPVNameReturn(self, *args, **kw):
self.value.connect(self.pvname.text(),
ca_callback=self.pv_update,
ca_connect_callback=self.connect_update)
def connect_update(self, **kw):
self.status_text = {True: 'connected', False: 'disconnected'}[ kw['conn'] ]
self.sig_status.newText.emit()
def pv_update(self, **kw):
print 'pv_update!! ', kw
self.content_text = "updated:" + str(kw['timestamp'])
self.sig_content.newText.emit()
def SetStatus(self, *args, **kw):
self.status.setText(self.status_text)
def SetContent(self, *args, **kw):
self.content.setText(self.content_text)
