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#!/usr/bin/python
#
# simple PV Probe application
import wx
import sys
import epics
from epics.wx import EpicsFunction, DelayedEpicsCallback
class PVDisplay(wx.Frame):
def __init__(self, pvname, parent=None, **kwds):
wx.Frame.__init__(self, parent, wx.ID_ANY, '',
wx.DefaultPosition, wx.Size(-1,-1),**kwds)
self.SetFont(wx.Font(11,wx.SWISS,wx.NORMAL,wx.BOLD,False))
self.pvname = pvname
self.SetTitle("%s" % pvname)
self.sizer = wx.GridBagSizer(3, 2)
panel = wx.Panel(self)
name = wx.StaticText(panel, label=pvname, size=(120, -1))
self.val = wx.StaticText(panel, label='unconnected', size=(200, -1))
self.info = wx.StaticText(panel, label='-- ' , size=(400,300))
self.info.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD,False))
self.sizer.Add(wx.StaticText(panel, label='PV: ', size=(60, -1)),
(0, 0), (1, 1), wx.EXPAND, 1)
self.sizer.Add(wx.StaticText(panel, label='Value: ', size=(60, -1)),
(1, 0), (1, 1), wx.EXPAND, 1)
self.sizer.Add(wx.StaticText(panel, label='Info: ', size=(60, -1)),
(2, 0), (1, 1), wx.EXPAND, 1)
self.sizer.Add(name, (0, 1), (1, 1), wx.EXPAND, 1)
self.sizer.Add(self.val, (1, 1), (1, 1), wx.ALIGN_RIGHT|wx.EXPAND, 1)
self.sizer.Add(self.info, (2, 1), (2, 2), wx.ALIGN_LEFT|wx.EXPAND, 1)
panel.SetSizer(self.sizer)
self.needs_info = None
self.timer = wx.Timer(self)
self.Bind(wx.EVT_TIMER, self.onTimer, self.timer)
self.s1 = wx.BoxSizer(wx.VERTICAL)
self.s1.Add(panel, 1, wx.EXPAND, 2)
self.s1.Fit(self)
self.Refresh()
self.connect_pv()
@EpicsFunction
def connect_pv(self):
self.pv = epics.PV(self.pvname, connection_callback=self.onConnect,
callback=self.onPV_value)
@EpicsFunction
def onTimer(self, evt):
if self.need_info and self.pv.connected:
self.info.SetLabel(self.pv.info)
self.timer.Stop()
self.needs_info = False
@DelayedEpicsCallback
def onConnect(self, **kws):
self.need_info = True
self.timer.Start(25)
@DelayedEpicsCallback
def onPV_value(self, name=None, char_value=None, **kws):
if len(char_value) > 90:
char_value = char_value[:90]
self.val.SetLabel(' %s' % char_value)
self.need_info = True
self.timer.Start(25)
class NameCtrl(wx.TextCtrl):
def __init__(self, panel, value='', action=None, **kws):
self.action = action
wx.TextCtrl.__init__(self, panel, wx.ID_ANY, value='',
style=wx.TE_PROCESS_ENTER, **kws)
self.Bind(wx.EVT_CHAR, self.onChar)
def onChar(self, event):
if event.GetKeyCode() == wx.WXK_RETURN and \
self.action is not None:
self.action(wx.TextCtrl.GetValue(self).strip())
event.Skip()
class ProbeFrame(wx.Frame):
def __init__(self, parent=None, **kwds):
wx.Frame.__init__(self, parent, wx.ID_ANY, '',
wx.DefaultPosition, wx.Size(-1,-1),**kwds)
self.SetTitle("Connect to Epics Records:")
self.SetFont(wx.Font(11,wx.SWISS,wx.NORMAL,wx.BOLD,False))
sizer = wx.BoxSizer(wx.HORIZONTAL)
panel = wx.Panel(self)
label = wx.StaticText(panel, label='PV Name:')
self.pvname = NameCtrl(panel, value='', size=(175,-1),
action=self.onName)
sizer.Add(label, 0, wx.ALIGN_LEFT, 1)
sizer.Add(self.pvname, 1, wx.EXPAND, 1)
panel.SetSizer(sizer)
sizer.Fit(panel)
s = wx.BoxSizer(wx.VERTICAL)
s.Add(panel)
s.Fit(self)
self.Refresh()
def onName(self, value, wid=None, **kws):
PVDisplay(value, parent=self).Show()
if __name__ == '__main__':
app = wx.App(redirect=False)
ProbeFrame().Show()
app.MainLoop()
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