Merged wxPython 2.2.2 over to the main branch

[wxWidgets.git] / wxPython / demo / wxProcess.py

diff --git a/wxPython/demo/wxProcess.py b/wxPython/demo/wxProcess.py
new file mode 100644 (file)
index 0000000..4e25bd6
--- /dev/null
+++ b/wxPython/demo/wxProcess.py
@@ -0,0 +1,157 @@
+
+from wxPython.wx import *
+
+#----------------------------------------------------------------------
+
+class TestPanel(wxPanel):
+    def __init__(self, parent, ID, log):
+        wxPanel.__init__(self, parent, ID)
+        self.log = log
+
+        self.process = None
+        EVT_IDLE(self, self.OnIdle)
+
+        # We can either derive from wxProcess and override OnTerminate
+        # or we can let wxProcess send this window an event that is
+        # caught in the normal way...
+        EVT_END_PROCESS(self, -1, self.OnProcessEnded)
+
+
+        # Make the controls
+        prompt = wxStaticText(self, -1, 'Command line:')
+        self.cmd = wxTextCtrl(self, -1, 'python data/echo.py')
+        self.exBtn = wxButton(self, -1, 'Execute')
+
+        self.out = wxTextCtrl(self, -1, '', style=wxTE_MULTILINE|wxTE_READONLY)
+
+        self.inp = wxTextCtrl(self, -1, '', style=wxTE_PROCESS_ENTER)
+        self.sndBtn = wxButton(self, -1, 'Send')
+        self.termBtn = wxButton(self, -1, 'Close Stream')
+        self.inp.Enable(false)
+        self.sndBtn.Enable(false)
+        self.termBtn.Enable(false)
+
+        # Hook up the events
+        EVT_BUTTON(self, self.exBtn.GetId(), self.OnExecuteBtn)
+        EVT_BUTTON(self, self.sndBtn.GetId(), self.OnSendText)
+        EVT_BUTTON(self, self.termBtn.GetId(), self.OnCloseStream)
+        EVT_TEXT_ENTER(self, self.inp.GetId(), self.OnSendText)
+
+
+        # Do the layout
+        box1 = wxBoxSizer(wxHORIZONTAL)
+        box1.Add(prompt, 0, wxALIGN_CENTER)
+        box1.Add(self.cmd, 1, wxALIGN_CENTER|wxLEFT|wxRIGHT, 5)
+        box1.Add(self.exBtn, 0)
+
+        box2 = wxBoxSizer(wxHORIZONTAL)
+        box2.Add(self.inp, 1, wxALIGN_CENTER)
+        box2.Add(self.sndBtn, 0, wxLEFT, 5)
+        box2.Add(self.termBtn, 0, wxLEFT, 5)
+
+        sizer = wxBoxSizer(wxVERTICAL)
+        sizer.Add(box1, 0, wxEXPAND|wxALL, 10)
+        sizer.Add(self.out, 1, wxEXPAND|wxALL, 10)
+        sizer.Add(box2, 0, wxEXPAND|wxALL, 10)
+
+        self.SetSizer(sizer)
+        self.SetAutoLayout(true)
+
+
+    def __del__(self):
+        if self.process is not None:
+            self.process.Detach()
+            self.process.CloseOutput()
+            self.process = None
+
+
+    def OnExecuteBtn(self, evt):
+        cmd = self.cmd.GetValue()
+
+        self.process = wxProcess(self)
+        self.process.Redirect();
+        pid = wxExecute(cmd, false, self.process)
+        self.log.write('OnExecuteBtn: "%s" pid: %s\n' % (cmd, pid))
+
+        self.inp.Enable(true)
+        self.sndBtn.Enable(true)
+        self.termBtn.Enable(true)
+        self.cmd.Enable(false)
+        self.exBtn.Enable(false)
+        self.inp.SetFocus()
+
+
+    def OnSendText(self, evt):
+        text = self.inp.GetValue()
+        self.inp.SetValue('')
+        self.log.write('OnSendText: "%s"\n' % text)
+        self.process.GetOutputStream().write(text + '\n')
+        self.inp.SetFocus()
+
+
+    def OnCloseStream(self, evt):
+        self.log.write('OnCloseStream\n')
+        self.process.CloseOutput()
+
+
+    def OnIdle(self, evt):
+        if self.process is not None:
+            stream = self.process.GetInputStream()
+
+            # Yes, this is weird.  For this particular stream, EOF
+            # simply means that there is no data available to be read,
+            # not truly the end of file.  Also, read() just reads all
+            # the currently available data, not until the real EOF...
+            if not stream.eof():
+                text = stream.read()
+                self.out.AppendText(text)
+
+
+    def OnProcessEnded(self, evt):
+        self.log.write('OnProcessEnded, pid:%s,  exitCode: %s\n' %
+                       (evt.GetPid(), evt.GetExitCode()))
+
+        stream = self.process.GetInputStream()
+        if not stream.eof():
+            text = stream.read()
+            self.out.AppendText(text)
+
+        self.process.Destroy()
+        self.process = None
+        self.inp.Enable(false)
+        self.sndBtn.Enable(false)
+        self.termBtn.Enable(false)
+        self.cmd.Enable(true)
+        self.exBtn.Enable(true)
+
+
+#----------------------------------------------------------------------
+
+def runTest(frame, nb, log):
+    win = TestPanel(nb, -1, log)
+    return win
+
+
+#----------------------------------------------------------------------
+
+
+overview = """\
+<html><body>
+<h2>wxProcess</h2>
+
+wxProcess lets you get notified when an asyncronous child process
+started by wxExecute terminates, and also to get input/output streams
+for the child process's stdout, stderr and stdin.
+
+<p>
+This demo launches a simple python script that echos back on stdout
+lines that it reads from stdin.  You can send text to the echo
+process' stdin by typing in the lower textctrl and clicking Send.
+
+<p>
+Clicking the Close Stream button will close the demo's end of the
+stdin pipe to the child process.  In our case that will cause the
+child process to exit its main loop.
+
+</body><html>
+"""