new sample - shows wxExecute
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5430 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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Vadim Zeitlin
292
samples/exec/exec.cpp
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292
samples/exec/exec.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: exec.cpp
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// Purpose: exec sample demonstrates wxExecute and related functions
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 15.01.00
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// RCS-ID: $Id$
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// Copyright: (c) Vadim Zeitlin
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "exec.cpp"
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#pragma interface "exec.cpp"
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#endif
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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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// for all others, include the necessary headers (this file is usually all you
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// need because it includes almost all "standard" wxWindows headers
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#ifndef WX_PRECOMP
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#include "wx/app.h"
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#include "wx/frame.h"
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#include "wx/utils.h"
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#endif
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#include "wx/process.h"
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// Define a new application type, each program should derive a class from wxApp
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class MyApp : public wxApp
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{
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public:
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// override base class virtuals
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// ----------------------------
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// this one is called on application startup and is a good place for the app
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// initialization (doing it here and not in the ctor allows to have an error
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// return: if OnInit() returns false, the application terminates)
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virtual bool OnInit();
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};
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// Define a new frame type: this is going to be our main frame
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class MyFrame : public wxFrame
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{
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public:
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// ctor(s)
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MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
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// event handlers (these functions should _not_ be virtual)
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void OnQuit(wxCommandEvent& event);
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void OnSyncExec(wxCommandEvent& event);
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void OnAsyncExec(wxCommandEvent& event);
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void OnShell(wxCommandEvent& event);
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void OnAbout(wxCommandEvent& event);
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private:
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wxString m_cmdLast;
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// any class wishing to process wxWindows events must use this macro
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DECLARE_EVENT_TABLE()
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};
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// This is the handler for process termination events
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class MyProcess : public wxProcess
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{
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public:
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MyProcess(wxFrame *parent, const wxString& cmd)
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: wxProcess(parent), m_cmd(cmd)
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{
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m_parent = parent;
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}
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// instead of overriding this virtual function we might as well process the
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// event from it in the frame class - this might be more convenient in some
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// cases
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virtual void OnTerminate(int pid, int status);
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private:
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wxFrame *m_parent;
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wxString m_cmd;
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};
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// IDs for the controls and the menu commands
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enum
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{
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// menu items
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Exec_Quit = 100,
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Exec_SyncExec = 200,
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Exec_AsyncExec,
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Exec_Shell,
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Exec_About = 300
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};
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// ----------------------------------------------------------------------------
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// event tables and other macros for wxWindows
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// ----------------------------------------------------------------------------
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// the event tables connect the wxWindows events with the functions (event
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// handlers) which process them. It can be also done at run-time, but for the
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// simple menu events like this the static method is much simpler.
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BEGIN_EVENT_TABLE(MyFrame, wxFrame)
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EVT_MENU(Exec_Quit, MyFrame::OnQuit)
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EVT_MENU(Exec_SyncExec, MyFrame::OnSyncExec)
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EVT_MENU(Exec_AsyncExec, MyFrame::OnAsyncExec)
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EVT_MENU(Exec_Shell, MyFrame::OnShell)
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EVT_MENU(Exec_About, MyFrame::OnAbout)
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END_EVENT_TABLE()
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// Create a new application object: this macro will allow wxWindows to create
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// the application object during program execution (it's better than using a
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// static object for many reasons) and also declares the accessor function
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// wxGetApp() which will return the reference of the right type (i.e. MyApp and
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// not wxApp)
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IMPLEMENT_APP(MyApp)
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// the application class
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// ----------------------------------------------------------------------------
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// `Main program' equivalent: the program execution "starts" here
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bool MyApp::OnInit()
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{
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// Create the main application window
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MyFrame *frame = new MyFrame(_T("Exec wxWindows sample"),
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wxDefaultPosition, wxSize(500, 140));
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// Show it and tell the application that it's our main window
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frame->Show(TRUE);
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SetTopWindow(frame);
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// success: wxApp::OnRun() will be called which will enter the main message
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// loop and the application will run. If we returned FALSE here, the
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// application would exit immediately.
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return TRUE;
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}
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// ----------------------------------------------------------------------------
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// main frame
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// ----------------------------------------------------------------------------
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// frame constructor
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MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
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: wxFrame((wxFrame *)NULL, -1, title, pos, size)
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{
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#ifdef __WXMAC__
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// we need this in order to allow the about menu relocation, since ABOUT is
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// not the default id of the about menu
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wxApp::s_macAboutMenuItemId = Exec_About;
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#endif
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// set the frame icon
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SetIcon(wxICON(mondrian));
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// create a menu bar
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wxMenu *menuFile = new wxMenu(_T(""), wxMENU_TEAROFF);
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menuFile->Append(Exec_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
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wxMenu *execMenu = new wxMenu;
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execMenu->Append(Exec_SyncExec, _T("Sync &execution...\tCtrl-E"),
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_T("Launch a program and return when it terminates"));
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execMenu->Append(Exec_AsyncExec, _T("&Async execution...\tCtrl-A"),
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_T("Launch a program and return immediately"));
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execMenu->Append(Exec_Shell, _T("Execute &shell command...\tCtrl-S"),
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_T("Launch a shell and execute a command in it"));
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wxMenu *helpMenu = new wxMenu(_T(""), wxMENU_TEAROFF);
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helpMenu->Append(Exec_About, _T("&About...\tF1"), _T("Show about dialog"));
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// now append the freshly created menu to the menu bar...
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wxMenuBar *menuBar = new wxMenuBar();
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menuBar->Append(menuFile, _T("&File"));
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menuBar->Append(execMenu, _T("&Exec"));
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menuBar->Append(helpMenu, _T("&Help"));
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// ... and attach this menu bar to the frame
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SetMenuBar(menuBar);
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#if wxUSE_STATUSBAR
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// create a status bar just for fun (by default with 1 pane only)
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CreateStatusBar(2);
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SetStatusText(_T("Welcome to wxWindows!"));
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#endif // wxUSE_STATUSBAR
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}
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// event handlers
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void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
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{
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// TRUE is to force the frame to close
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Close(TRUE);
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}
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void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
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{
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wxMessageBox(_T("Exec sample\n<EFBFBD> 2000 Vadim Zeitlin"),
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_T("About Exec"), wxOK | wxICON_INFORMATION, this);
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}
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void MyFrame::OnSyncExec(wxCommandEvent& WXUNUSED(event))
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{
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wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
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_T("Exec sample"),
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m_cmdLast);
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if ( !cmd )
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return;
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int code = wxExecute(cmd, TRUE /* sync */);
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wxLogStatus(_T("Process '%s' terminated with exit code %d."),
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cmd.c_str(), code);
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m_cmdLast = cmd;
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}
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void MyFrame::OnAsyncExec(wxCommandEvent& WXUNUSED(event))
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{
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wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
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_T("Exec sample"),
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m_cmdLast);
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if ( !cmd )
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return;
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wxProcess *process = new MyProcess(this, cmd);
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if ( !wxExecute(cmd, FALSE /* async */, process) )
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{
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wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
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delete process;
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}
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else
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{
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m_cmdLast = cmd;
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}
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}
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void MyFrame::OnShell(wxCommandEvent& WXUNUSED(event))
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{
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wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
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_T("Exec sample"),
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m_cmdLast);
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if ( !cmd )
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return;
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int code = wxShell(cmd);
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wxLogStatus(_T("Shell command '%s' terminated with exit code %d."),
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cmd.c_str(), code);
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m_cmdLast = cmd;
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}
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// ----------------------------------------------------------------------------
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// MyProcess
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// ----------------------------------------------------------------------------
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void MyProcess::OnTerminate(int pid, int status)
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{
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wxLogStatus(m_parent, _T("Process %u ('%s') terminated with exit code %d."),
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pid, m_cmd.c_str(), status);
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// we're not needed any more
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delete this;
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}
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