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[wxWidgets.git] / wxPython / demo / Process.py
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c368d904 1
8fa876ca 2import wx
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3
4#----------------------------------------------------------------------
5
8fa876ca 6class TestPanel(wx.Panel):
c368d904 7 def __init__(self, parent, ID, log):
8fa876ca 8 wx.Panel.__init__(self, parent, ID)
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9 self.log = log
10
11 self.process = None
8fa876ca 12 self.Bind(wx.EVT_IDLE, self.OnIdle)
c368d904 13
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14 # We can either derive from wx.Process and override OnTerminate
15 # or we can let wx.Process send this window an event that is
c368d904 16 # caught in the normal way...
8fa876ca 17 self.Bind(wx.EVT_END_PROCESS, self.OnProcessEnded)
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18
19
20 # Make the controls
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21 prompt = wx.StaticText(self, -1, 'Command line:')
22 self.cmd = wx.TextCtrl(self, -1, 'python -u data/echo.py')
23 self.exBtn = wx.Button(self, -1, 'Execute')
c368d904 24
8fa876ca 25 self.out = wx.TextCtrl(self, -1, '', style=wx.TE_MULTILINE|wx.TE_READONLY)
c368d904 26
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27 self.inp = wx.TextCtrl(self, -1, '', style=wx.TE_PROCESS_ENTER)
28 self.sndBtn = wx.Button(self, -1, 'Send')
29 self.termBtn = wx.Button(self, -1, 'Close Stream')
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30 self.inp.Enable(False)
31 self.sndBtn.Enable(False)
32 self.termBtn.Enable(False)
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33
34 # Hook up the events
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35 self.Bind(wx.EVT_BUTTON, self.OnExecuteBtn, self.exBtn)
36 self.Bind(wx.EVT_BUTTON, self.OnSendText, self.sndBtn)
37 self.Bind(wx.EVT_BUTTON, self.OnCloseStream, self.termBtn)
38 self.Bind(wx.EVT_TEXT_ENTER, self.OnSendText, self.inp)
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39
40
41 # Do the layout
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42 box1 = wx.BoxSizer(wx.HORIZONTAL)
43 box1.Add(prompt, 0, wx.ALIGN_CENTER)
44 box1.Add(self.cmd, 1, wx.ALIGN_CENTER|wx.LEFT|wx.RIGHT, 5)
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45 box1.Add(self.exBtn, 0)
46
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47 box2 = wx.BoxSizer(wx.HORIZONTAL)
48 box2.Add(self.inp, 1, wx.ALIGN_CENTER)
49 box2.Add(self.sndBtn, 0, wx.LEFT, 5)
50 box2.Add(self.termBtn, 0, wx.LEFT, 5)
c368d904 51
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52 sizer = wx.BoxSizer(wx.VERTICAL)
53 sizer.Add(box1, 0, wx.EXPAND|wx.ALL, 10)
54 sizer.Add(self.out, 1, wx.EXPAND|wx.ALL, 10)
55 sizer.Add(box2, 0, wx.EXPAND|wx.ALL, 10)
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56
57 self.SetSizer(sizer)
1e4a197e 58 self.SetAutoLayout(True)
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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
8fa876ca 71 self.process = wx.Process(self)
c368d904 72 self.process.Redirect();
8fa876ca 73 pid = wx.Execute(cmd, wx.EXEC_ASYNC, self.process)
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74 self.log.write('OnExecuteBtn: "%s" pid: %s\n' % (cmd, pid))
75
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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)
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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')
a541c325 94 #print "b4 CloseOutput"
c368d904 95 self.process.CloseOutput()
a541c325 96 #print "after CloseOutput"
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97
98 def OnIdle(self, evt):
99 if self.process is not None:
100 stream = self.process.GetInputStream()
101
1e4a197e 102 if stream.CanRead():
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103 text = stream.read()
104 self.out.AppendText(text)
105
106
107 def OnProcessEnded(self, evt):
108 self.log.write('OnProcessEnded, pid:%s, exitCode: %s\n' %
109 (evt.GetPid(), evt.GetExitCode()))
110
111 stream = self.process.GetInputStream()
8fa876ca 112
1e4a197e 113 if stream.CanRead():
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114 text = stream.read()
115 self.out.AppendText(text)
116
117 self.process.Destroy()
118 self.process = None
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119 self.inp.Enable(False)
120 self.sndBtn.Enable(False)
121 self.termBtn.Enable(False)
122 self.cmd.Enable(True)
123 self.exBtn.Enable(True)
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124
125
126#----------------------------------------------------------------------
127
128def runTest(frame, nb, log):
129 win = TestPanel(nb, -1, log)
130 return win
131
132
133#----------------------------------------------------------------------
134
135
136overview = """\
137<html><body>
95bfd958 138<h2>wx.Process</h2>
c368d904 139
95bfd958 140wx.Process lets you get notified when an asyncronous child process
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141started by wxExecute terminates, and also to get input/output streams
142for the child process's stdout, stderr and stdin.
143
144<p>
145This demo launches a simple python script that echos back on stdout
146lines that it reads from stdin. You can send text to the echo
147process' stdin by typing in the lower textctrl and clicking Send.
148
149<p>
150Clicking the Close Stream button will close the demo's end of the
151stdin pipe to the child process. In our case that will cause the
152child process to exit its main loop.
153
154</body><html>
155"""
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156
157
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158if __name__ == '__main__':
159 import sys,os
160 import run
8eca4fef 161 run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])