samples/config/conftest.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        conftest.cpp
   3 // Purpose:     demo of wxConfig and related classes
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     03.08.98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22     #pragma hdrstop
  23 #endif
  24
  25 #ifndef  WX_PRECOMP
  26   #include "wx/wx.h"
  27 #endif //precompiled headers
  28
  29 #include "wx/log.h"
  30 #include "wx/config.h"
  31
  32 #ifndef __WXMSW__
  33     #include "../sample.xpm"
  34 #endif
  35
  36 // ----------------------------------------------------------------------------
  37 // classes
  38 // ----------------------------------------------------------------------------
  39
  40 class MyApp: public wxApp
  41 {
  42 public:
  43   // implement base class virtuals
  44   virtual bool OnInit();
  45   virtual int OnExit();
  46 };
  47
  48 class MyFrame: public wxFrame
  49 {
  50 public:
  51     MyFrame();
  52     virtual ~MyFrame();
  53
  54     // callbacks
  55     void OnQuit(wxCommandEvent& event);
  56     void OnAbout(wxCommandEvent& event);
  57     void OnDelete(wxCommandEvent& event);
  58
  59 private:
  60     wxTextCtrl *m_text;
  61     wxCheckBox *m_check;
  62
  63     DECLARE_EVENT_TABLE()
  64 };
  65
  66 enum
  67 {
  68   ConfTest_Quit,
  69   ConfTest_About,
  70   ConfTest_Delete
  71 };
  72
  73 // ----------------------------------------------------------------------------
  74 // event tables
  75 // ----------------------------------------------------------------------------
  76
  77 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  78   EVT_MENU(ConfTest_Quit, MyFrame::OnQuit)
  79   EVT_MENU(ConfTest_About, MyFrame::OnAbout)
  80   EVT_MENU(ConfTest_Delete, MyFrame::OnDelete)
  81 END_EVENT_TABLE()
  82
  83 // ============================================================================
  84 // implementation
  85 // ============================================================================
  86
  87 // ----------------------------------------------------------------------------
  88 // application
  89 // ----------------------------------------------------------------------------
  90
  91 IMPLEMENT_APP(MyApp)
  92
  93 // `Main program' equivalent, creating windows and returning main app frame
  94 bool MyApp::OnInit()
  95 {
  96     if ( !wxApp::OnInit() )
  97         return false;
  98
  99     // we're using wxConfig's "create-on-demand" feature: it will create the
 100     // config object when it's used for the first time. It has a number of
 101     // advantages compared with explicitly creating our wxConfig:
 102     //  1) we don't pay for it if we don't use it
 103     //  2) there is no danger to create it twice
 104
 105     // application and vendor name are used by wxConfig to construct the name
 106     // of the config file/registry key and must be set before the first call
 107     // to Get() if you want to override the default values (the application
 108     // name is the name of the executable and the vendor name is the same)
 109     SetVendorName(_T("wxWidgets"));
 110     SetAppName(_T("conftest")); // not needed, it's the default value
 111
 112     wxConfigBase *pConfig = wxConfigBase::Get();
 113
 114     // uncomment this to force writing back of the defaults for all values
 115     // if they're not present in the config - this can give the user an idea
 116     // of all possible settings for this program
 117     pConfig->SetRecordDefaults();
 118
 119     // or you could also write something like this:
 120     //  wxFileConfig *pConfig = new wxFileConfig("conftest");
 121     //  wxConfigBase::Set(pConfig);
 122     // where you can also specify the file names explicitly if you wish.
 123     // Of course, calling Set() is optional and you only must do it if
 124     // you want to later retrieve this pointer with Get().
 125
 126     // create the main program window
 127     MyFrame *frame = new MyFrame;
 128     frame->Show(true);
 129     SetTopWindow(frame);
 130
 131     // use our config object...
 132     if ( pConfig->Read(_T("/Controls/Check"), 1l) != 0 ) {
 133         wxMessageBox(_T("You can disable this message box by unchecking\n")
 134                     _T("the checkbox in the main window (of course, a real\n")
 135                     _T("program would have a checkbox right here but we\n")
 136                     _T("keep it simple)"), _T("Welcome to wxConfig demo"),
 137                     wxICON_INFORMATION | wxOK);
 138     }
 139
 140     return true;
 141 }
 142
 143 int MyApp::OnExit()
 144 {
 145     // clean up: Set() returns the active config object as Get() does, but unlike
 146     // Get() it doesn't try to create one if there is none (definitely not what
 147     // we want here!)
 148     delete wxConfigBase::Set((wxConfigBase *) NULL);
 149
 150     return 0;
 151 }
 152
 153 // ----------------------------------------------------------------------------
 154 // frame
 155 // ----------------------------------------------------------------------------
 156
 157 // main frame ctor
 158 MyFrame::MyFrame()
 159        : wxFrame((wxFrame *) NULL, wxID_ANY, _T("wxConfig Demo"))
 160 {
 161     SetIcon(wxICON(sample));
 162
 163     // menu
 164     wxMenu *file_menu = new wxMenu;
 165
 166     file_menu->Append(ConfTest_Delete, _T("&Delete"), _T("Delete config file"));
 167     file_menu->AppendSeparator();
 168     file_menu->Append(ConfTest_About, _T("&About\tF1"), _T("About this sample"));
 169     file_menu->AppendSeparator();
 170     file_menu->Append(ConfTest_Quit, _T("E&xit\tAlt-X"), _T("Exit the program"));
 171     wxMenuBar *menu_bar = new wxMenuBar;
 172     menu_bar->Append(file_menu, _T("&File"));
 173     SetMenuBar(menu_bar);
 174
 175 #if wxUSE_STATUSBAR
 176     CreateStatusBar();
 177 #endif // wxUSE_STATUSBAR
 178
 179     // child controls
 180     wxPanel *panel = new wxPanel(this);
 181     (void)new wxStaticText(panel, wxID_ANY, _T("These controls remember their values!"),
 182                             wxPoint(10, 10), wxSize(300, 20));
 183     m_text = new wxTextCtrl(panel, wxID_ANY, _T(""), wxPoint(10, 40), wxSize(300, 20));
 184     m_check = new wxCheckBox(panel, wxID_ANY, _T("show welcome message box at startup"),
 185                             wxPoint(10, 70), wxSize(300, 20));
 186
 187     // restore the control's values from the config
 188
 189     // NB: in this program, the config object is already created at this moment
 190     // because we had called Get() from MyApp::OnInit(). However, if you later
 191     // change the code and don't create it before this line, it won't break
 192     // anything - unlike if you manually create wxConfig object with Create()
 193     // or in any other way (then you must be sure to create it before using it!).
 194     wxConfigBase *pConfig = wxConfigBase::Get();
 195
 196     // we could write Read("/Controls/Text") as well, it's just to show SetPath()
 197     pConfig->SetPath(_T("/Controls"));
 198
 199     m_text->SetValue(pConfig->Read(_T("Text"), _T("")));
 200     m_check->SetValue(pConfig->Read(_T("Check"), 1l) != 0);
 201
 202     // SetPath() understands ".."
 203     pConfig->SetPath(_T("../MainFrame"));
 204
 205     // restore frame position and size
 206     int x = pConfig->Read(_T("x"), 50),
 207         y = pConfig->Read(_T("y"), 50),
 208         w = pConfig->Read(_T("w"), 350),
 209         h = pConfig->Read(_T("h"), 200);
 210     Move(x, y);
 211     SetClientSize(w, h);
 212
 213     pConfig->SetPath(_T("/"));
 214     wxString s;
 215     if ( pConfig->Read(_T("TestValue"), &s) )
 216     {
 217         wxLogStatus(this, wxT("TestValue from config is '%s'"), s.c_str());
 218     }
 219     else
 220     {
 221         wxLogStatus(this, wxT("TestValue not found in the config"));
 222     }
 223 }
 224
 225 void MyFrame::OnQuit(wxCommandEvent&)
 226 {
 227     Close(true);
 228 }
 229
 230 void MyFrame::OnAbout(wxCommandEvent&)
 231 {
 232     wxMessageBox(_T("wxConfig demo\n(c) 1998-2001 Vadim Zeitlin"), _T("About"),
 233                  wxICON_INFORMATION | wxOK);
 234 }
 235
 236 void MyFrame::OnDelete(wxCommandEvent&)
 237 {
 238     wxConfigBase *pConfig = wxConfigBase::Get();
 239     if ( pConfig == NULL )
 240     {
 241         wxLogError(_T("No config to delete!"));
 242         return;
 243     }
 244
 245     if ( pConfig->DeleteAll() )
 246     {
 247         wxLogMessage(_T("Config file/registry key successfully deleted."));
 248
 249         delete wxConfigBase::Set(NULL);
 250         wxConfigBase::DontCreateOnDemand();
 251     }
 252     else
 253     {
 254         wxLogError(_T("Deleting config file/registry key failed."));
 255     }
 256 }
 257
 258 MyFrame::~MyFrame()
 259 {
 260     wxConfigBase *pConfig = wxConfigBase::Get();
 261     if ( pConfig == NULL )
 262         return;
 263
 264     // save the control's values to the config
 265     pConfig->Write(_T("/Controls/Text"), m_text->GetValue());
 266     pConfig->Write(_T("/Controls/Check"), m_check->GetValue());
 267
 268     // save the frame position
 269     int x, y, w, h;
 270     GetClientSize(&w, &h);
 271     GetPosition(&x, &y);
 272     pConfig->Write(_T("/MainFrame/x"), (long) x);
 273     pConfig->Write(_T("/MainFrame/y"), (long) y);
 274     pConfig->Write(_T("/MainFrame/w"), (long) w);
 275     pConfig->Write(_T("/MainFrame/h"), (long) h);
 276
 277     pConfig->Write(_T("/TestValue"), wxT("A test value"));
 278 }
 279