a24268437f
app, and added a sample showing how to do it. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15329 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
379 lines
10 KiB
C++
379 lines
10 KiB
C++
//----------------------------------------------------------------------
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// Name: embedded.cpp
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// Purpose: To server as an example of how to use wxPython from
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// within a C++ wxWindows program.
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//
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// Author: Robin Dunn
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//
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// Created: 1-May-2002
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// RCS-ID: $Id$
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// Copyright: (c) 2002 by Total Control Software
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// Licence: wxWindows license
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//----------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx/wx.h".
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#include <wx/wxprec.h>
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include <wx/wx.h>
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#endif
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#include <wx/splitter.h>
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#if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__)
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#include "mondrian.xpm"
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#endif
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// Import Python and wxPython headers
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#include <Python.h>
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#include <wxPython.h>
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//----------------------------------------------------------------------
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// Class definitions
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class MyApp : public wxApp
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{
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public:
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virtual bool OnInit();
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virtual ~MyApp();
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void Init_wxPython();
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private:
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PyThreadState* main_tstate;
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};
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class MyFrame : public wxFrame
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{
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public:
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MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
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void RedirectStdio();
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wxWindow* DoPythonStuff(wxWindow* parent);
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void OnExit(wxCommandEvent& event);
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void OnPyFrame(wxCommandEvent& event);
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private:
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DECLARE_EVENT_TABLE()
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};
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//----------------------------------------------------------------------
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// MyApp methods
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bool MyApp::OnInit()
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{
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Init_wxPython();
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MyFrame *frame = new MyFrame(_T("Embedded wxPython Test"),
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wxPoint(50, 50), wxSize(700, 600));
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frame->Show(TRUE);
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return TRUE;
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}
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void MyApp::Init_wxPython()
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{
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// Initialize Python
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Py_Initialize();
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PyEval_InitThreads();
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// Load the wxPython core API. Imports the wxPython.wxc
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// module and sets a pointer to a function table located there.
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wxPyCoreAPI_IMPORT();
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// Save the current Python thread state and release the
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// Global Interpreter Lock.
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main_tstate = wxPyBeginAllowThreads();
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}
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MyApp::~MyApp()
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{
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// Restore the thread state and tell Python to cleanup after itself.
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wxPyEndAllowThreads(main_tstate);
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Py_Finalize();
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}
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IMPLEMENT_APP(MyApp)
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//----------------------------------------------------------------------
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enum
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{
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ID_EXIT=1001,
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ID_PYFRAME
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};
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BEGIN_EVENT_TABLE(MyFrame, wxFrame)
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EVT_MENU(ID_EXIT, OnExit)
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EVT_MENU(ID_PYFRAME, OnPyFrame)
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END_EVENT_TABLE()
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MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
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: wxFrame(NULL, -1, title, pos, size,
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wxDEFAULT_FRAME_STYLE|wxNO_FULL_REPAINT_ON_RESIZE)
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{
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SetIcon(wxICON(mondrian));
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wxMenuBar* mbar = new wxMenuBar;
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wxMenu* menu = new wxMenu;
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menu->Append(ID_PYFRAME, "Make wx&Python frame");
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menu->AppendSeparator();
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menu->Append(ID_EXIT, "&Close Frame\tAlt-X");
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mbar->Append(menu, "&File");
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SetMenuBar(mbar);
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CreateStatusBar();
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RedirectStdio();
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// Make some child windows from C++
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wxSplitterWindow* sp = new wxSplitterWindow(this, -1);
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wxPanel* p1 = new wxPanel(sp, -1);
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p1->SetFont(wxFont(12, wxSWISS, wxNORMAL, wxBOLD));
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new wxStaticText(p1, -1,
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wxT("The frame, menu, splitter, this panel and this text were created in C++..."),
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wxPoint(10,10));
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// And get a panel from Python
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wxWindow* p2 = DoPythonStuff(sp);
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sp->SplitHorizontally(p1, p2, GetClientSize().y/4);
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}
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void MyFrame::OnExit(wxCommandEvent& event)
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{
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Close();
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}
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//----------------------------------------------------------------------
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// This is were the fun begins...
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char* python_code1 = "\
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from wxPython.wx import wxFrame\n\
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f = wxFrame(None, -1, 'Hello from wxPython!', size=(250, 150))\n\
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f.Show()\n\
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";
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void MyFrame::OnPyFrame(wxCommandEvent& event)
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{
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// For simple Python code that doesn't have to interact with the
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// C++ code in any way, you can execute it with PyRun_SimpleString.
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// First, whenever you do anyting with Python objects or code, you
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// *MUST* aquire the Global Interpreter Lock and block other
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// Python threads from running.
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wxPyBeginBlockThreads();
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// Execute the code in the __main__ module
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PyRun_SimpleString(python_code1);
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// Finally, release the GIL and let other Python threads run.
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wxPyEndBlockThreads();
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}
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void MyFrame::RedirectStdio()
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{
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// This is a helpful little tidbit to help debugging and such. It
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// redirects Python's stdout and stderr to a window that will popup
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// only on demand when something is printed, like a traceback.
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char* python_redirect = "\
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import sys\n\
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from wxPython.wx import wxPyOnDemandOutputWindow\n\
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output = wxPyOnDemandOutputWindow()\n\
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sys.stdin = sys.stderr = output\n\
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";
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wxPyBeginBlockThreads();
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PyRun_SimpleString(python_redirect);
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wxPyEndBlockThreads();
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}
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char* python_code2 = "\
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import embedded_sample\n\
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\n\
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def makeWindow(parent):\n\
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win = embedded_sample.MyPanel(parent)\n\
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return win\n\
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";
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wxWindow* MyFrame::DoPythonStuff(wxWindow* parent)
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{
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// More complex embedded situations will require passing C++ objects to
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// Python and/or returning objects from Python to be used in C++. This
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// sample shows one way to do it. NOTE: The above code could just have
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// easily come from a file, or the whole thing coupld be in the Python
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// module that is imported and manipulated directly in this C++ code. See
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// the Python API for more details.
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wxWindow* window = NULL;
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PyObject* result;
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// As always, first grab the GIL
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wxPyBeginBlockThreads();
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// Now make a dictionary to serve as the global namespace when the code is
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// executed. Put a reference to the builtins module in it. (Yes, the
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// names are supposed to be different, I don't know why...)
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PyObject* globals = PyDict_New();
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PyObject* builtins = PyImport_ImportModule("__builtin__");
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PyDict_SetItemString(globals, "__builtins__", builtins);
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Py_DECREF(builtins);
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// Execute the code to make the makeWindow function
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result = PyRun_String(python_code2, Py_file_input, globals, globals);
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// Was there an exception?
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if (! result) {
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PyErr_Print();
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wxPyEndBlockThreads();
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return NULL;
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}
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Py_DECREF(result);
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// Now there should be an object named 'makeWindow' in the dictionary that
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// we can grab a pointer to:
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PyObject* func = PyDict_GetItemString(globals, "makeWindow");
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wxASSERT(PyCallable_Check(func));
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// Now build an argument tuple and call the Python function. Notice the
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// use of another wxPython API to take a wxWindows object and build a
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// wxPython object that wraps it.
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PyObject* arg = wxPyMake_wxObject(parent);
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wxASSERT(arg != NULL);
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PyObject* tuple = PyTuple_New(1);
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PyTuple_SET_ITEM(tuple, 0, arg);
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result = PyEval_CallObject(func, tuple);
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// Was there an exception?
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if (! result)
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PyErr_Print();
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else {
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// Otherwise, get the returned window out of Python-land and
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// into C++-ville...
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bool error = SWIG_GetPtrObj(result, (void**)&window, "_wxWindow_p");
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wxASSERT_MSG(!error, wxT("Returned object was not a wxWindow!"));
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Py_DECREF(result);
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}
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// Release the python objects we still have
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Py_DECREF(globals);
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Py_DECREF(tuple);
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// Finally, after all Python stuff is done, release the GIL
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wxPyEndBlockThreads();
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return window;
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}
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//----------------------------------------------------------------------
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// void MyFrame::OnButton(wxCommandEvent& WXUNUSED(event))
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// {
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// //Py_Initialize();
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// //PySys_SetArgv(argc, argv)
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// // // initialize thread support
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// // PyEval_InitThreads();
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// wxPyBeginBlockThreads();
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// PyRun_SimpleString(
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// "from wxPython.wx import *\n"
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// "f = wxFrame(None, -1, 'Hello from wxPython', size=(250,150))\n"
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// "f.Show()"
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// );
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// wxPyEndBlockThreads();
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// }
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// ////////////////////////////////////////////////////////////////////////
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// ////////////////////////////////////////////////////////////////////////
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// ////////////////////////////////////////////////////////////////////////
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// /// this, RedirectIOToConsole(), help came from
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// /// http://www.halcyon.com/ast/dload/guicon.htm
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// // #include <windows.h>
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// // #include <stdio.h>
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// #include <fcntl.h>
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// #include <io.h>
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// // #include <iostream>
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// // #include <fstream>
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// // //#ifndef _USE_OLD_IOSTREAMS
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// // using namespace std;
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// // //#endif
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// // maximum mumber of lines the output console should have
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// static const WORD MAX_CONSOLE_LINES = 500;
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// void RedirectIOToConsole()
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// {
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// int hConHandle;
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// long lStdHandle;
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// CONSOLE_SCREEN_BUFFER_INFO coninfo;
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// FILE *fp;
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// // allocate a console for this app
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// AllocConsole();
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// // set the screen buffer to be big enough to let us scroll text
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// GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &coninfo);
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// coninfo.dwSize.Y = MAX_CONSOLE_LINES;
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// SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), coninfo.dwSize);
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// // redirect unbuffered STDOUT to the console
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// lStdHandle = (long)GetStdHandle(STD_OUTPUT_HANDLE);
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// hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
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// fp = _fdopen( hConHandle, "w" );
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// *stdout = *fp;
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// setvbuf( stdout, NULL, _IONBF, 0 );
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// // redirect unbuffered STDIN to the console
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// lStdHandle = (long)GetStdHandle(STD_INPUT_HANDLE);
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// hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
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// fp = _fdopen( hConHandle, "r" );
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// *stdin = *fp;
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// setvbuf( stdin, NULL, _IONBF, 0 );
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// // redirect unbuffered STDERR to the console
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// lStdHandle = (long)GetStdHandle(STD_ERROR_HANDLE);
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// hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
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// fp = _fdopen( hConHandle, "w" );
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// *stderr = *fp;
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// setvbuf( stderr, NULL, _IONBF, 0 );
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// // make cout, wcout, cin, wcin, wcerr, cerr, wclog and clog
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// // point to console as well
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// //std::ios::sync_with_stdio();
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// }
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// ////////////////////////////////////////////////////////////////////////
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// ////////////////////////////////////////////////////////////////////////
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// ////////////////////////////////////////////////////////////////////////
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