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Commit	Line	Data
	1
	2	from wxPython.wx import *
	3
	4	#----------------------------------------------------------------------
	5
	6	class TestPanel(wxPanel):
	7	def __init__(self, parent, ID, log):
	8	wxPanel.__init__(self, parent, ID)
	9	self.log = log
	10
	11	self.process = None
	12	EVT_IDLE(self, self.OnIdle)
	13
	14	# We can either derive from wxProcess and override OnTerminate
	15	# or we can let wxProcess send this window an event that is
	16	# caught in the normal way...
	17	EVT_END_PROCESS(self, -1, self.OnProcessEnded)
	18
	19
	20	# Make the controls
	21	prompt = wxStaticText(self, -1, 'Command line:')
	22	self.cmd = wxTextCtrl(self, -1, 'python data/echo.py')
	23	self.exBtn = wxButton(self, -1, 'Execute')
	24
	25	self.out = wxTextCtrl(self, -1, '', style=wxTE_MULTILINE\|wxTE_READONLY)
	26
	27	self.inp = wxTextCtrl(self, -1, '', style=wxTE_PROCESS_ENTER)
	28	self.sndBtn = wxButton(self, -1, 'Send')
	29	self.termBtn = wxButton(self, -1, 'Close Stream')
	30	self.inp.Enable(false)
	31	self.sndBtn.Enable(false)
	32	self.termBtn.Enable(false)
	33
	34	# Hook up the events
	35	EVT_BUTTON(self, self.exBtn.GetId(), self.OnExecuteBtn)
	36	EVT_BUTTON(self, self.sndBtn.GetId(), self.OnSendText)
	37	EVT_BUTTON(self, self.termBtn.GetId(), self.OnCloseStream)
	38	EVT_TEXT_ENTER(self, self.inp.GetId(), self.OnSendText)
	39
	40
	41	# Do the layout
	42	box1 = wxBoxSizer(wxHORIZONTAL)
	43	box1.Add(prompt, 0, wxALIGN_CENTER)
	44	box1.Add(self.cmd, 1, wxALIGN_CENTER\|wxLEFT\|wxRIGHT, 5)
	45	box1.Add(self.exBtn, 0)
	46
	47	box2 = wxBoxSizer(wxHORIZONTAL)
	48	box2.Add(self.inp, 1, wxALIGN_CENTER)
	49	box2.Add(self.sndBtn, 0, wxLEFT, 5)
	50	box2.Add(self.termBtn, 0, wxLEFT, 5)
	51
	52	sizer = wxBoxSizer(wxVERTICAL)
	53	sizer.Add(box1, 0, wxEXPAND\|wxALL, 10)
	54	sizer.Add(self.out, 1, wxEXPAND\|wxALL, 10)
	55	sizer.Add(box2, 0, wxEXPAND\|wxALL, 10)
	56
	57	self.SetSizer(sizer)
	58	self.SetAutoLayout(true)
	59
	60
	61	def __del__(self):
	62	if self.process is not None:
	63	self.process.Detach()
	64	self.process.CloseOutput()
	65	self.process = None
	66
	67
	68	def OnExecuteBtn(self, evt):
	69	cmd = self.cmd.GetValue()
	70
	71	self.process = wxProcess(self)
	72	self.process.Redirect();
	73	pid = wxExecute(cmd, false, self.process)
	74	self.log.write('OnExecuteBtn: "%s" pid: %s\n' % (cmd, pid))
	75
	76	self.inp.Enable(true)
	77	self.sndBtn.Enable(true)
	78	self.termBtn.Enable(true)
	79	self.cmd.Enable(false)
	80	self.exBtn.Enable(false)
	81	self.inp.SetFocus()
	82
	83
	84	def OnSendText(self, evt):
	85	text = self.inp.GetValue()
	86	self.inp.SetValue('')
	87	self.log.write('OnSendText: "%s"\n' % text)
	88	self.process.GetOutputStream().write(text + '\n')
	89	self.inp.SetFocus()
	90
	91
	92	def OnCloseStream(self, evt):
	93	self.log.write('OnCloseStream\n')
	94	print "b4 CloseOutput"
	95	self.process.CloseOutput()
	96	print "after CloseOutput"
	97
	98	def OnIdle(self, evt):
	99	if self.process is not None:
	100	stream = self.process.GetInputStream()
	101
	102	# Yes, this is weird. For this particular stream, EOF
	103	# simply means that there is no data available to be read,
	104	# not truly the end of file. Also, read() just reads all
	105	# the currently available data, not until the real EOF...
	106	if not stream.eof():
	107	text = stream.read()
	108	self.out.AppendText(text)
	109
	110
	111	def OnProcessEnded(self, evt):
	112	self.log.write('OnProcessEnded, pid:%s, exitCode: %s\n' %
	113	(evt.GetPid(), evt.GetExitCode()))
	114
	115	stream = self.process.GetInputStream()
	116	if not stream.eof():
	117	text = stream.read()
	118	self.out.AppendText(text)
	119
	120	self.process.Destroy()
	121	self.process = None
	122	self.inp.Enable(false)
	123	self.sndBtn.Enable(false)
	124	self.termBtn.Enable(false)
	125	self.cmd.Enable(true)
	126	self.exBtn.Enable(true)
	127
	128
	129	#----------------------------------------------------------------------
	130
	131	def runTest(frame, nb, log):
	132	win = TestPanel(nb, -1, log)
	133	return win
	134
	135
	136	#----------------------------------------------------------------------
	137
	138
	139	overview = """\
	140	<html><body>
	141	<h2>wxProcess</h2>
	142
	143	wxProcess lets you get notified when an asyncronous child process
	144	started by wxExecute terminates, and also to get input/output streams
	145	for the child process's stdout, stderr and stdin.
	146
	147	<p>
	148	This demo launches a simple python script that echos back on stdout
	149	lines that it reads from stdin. You can send text to the echo
	150	process' stdin by typing in the lower textctrl and clicking Send.
	151
	152	<p>
	153	Clicking the Close Stream button will close the demo's end of the
	154	stdin pipe to the child process. In our case that will cause the
	155	child process to exit its main loop.
	156
	157	</body><html>
	158	"""