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 #ifndef  WX_PRECOMP
  22   #include "wx/wx.h"
  23 #endif //precompiled headers
  24
  25 #include "wx/log.h"
  26 #include "wx/config.h"
  27
  28 // ----------------------------------------------------------------------------
  29 // classes
  30 // ----------------------------------------------------------------------------
  31 class MyApp: public wxApp
  32 {
  33 public:
  34   // implement base class virtuals
  35   virtual bool OnInit();
  36   virtual int OnExit();
  37 };
  38
  39 class MyFrame: public wxFrame
  40 {
  41 public:
  42   MyFrame();
  43   virtual ~MyFrame();
  44
  45   // callbacks
  46   void OnQuit(wxCommandEvent& event);
  47   void OnAbout(wxCommandEvent& event);
  48   void OnDelete(wxCommandEvent& event);
  49   bool OnClose() { return TRUE; }
  50
  51 private:
  52   wxTextCtrl *m_text;
  53   wxCheckBox *m_check;
  54
  55   DECLARE_EVENT_TABLE()
  56 };
  57
  58 enum
  59 {
  60   Minimal_Quit,
  61   Minimal_About,
  62   Minimal_Delete
  63 };
  64
  65 // ----------------------------------------------------------------------------
  66 // event tables
  67 // ----------------------------------------------------------------------------
  68 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  69   EVT_MENU(Minimal_Quit, MyFrame::OnQuit)
  70   EVT_MENU(Minimal_About, MyFrame::OnAbout)
  71   EVT_MENU(Minimal_Delete, MyFrame::OnDelete)
  72 END_EVENT_TABLE()
  73
  74 // ============================================================================
  75 // implementation
  76 // ============================================================================
  77
  78 // ----------------------------------------------------------------------------
  79 // application
  80 // ----------------------------------------------------------------------------
  81 IMPLEMENT_APP(MyApp)
  82
  83 // `Main program' equivalent, creating windows and returning main app frame
  84 bool MyApp::OnInit()
  85 {
  86   // we're using wxConfig's "create-on-demand" feature: it will create the
  87   // config object when it's used for the first time. It has a number of
  88   // advantages compared with explicitly creating our wxConfig:
  89   //  1) we don't pay for it if we don't use it
  90   //  2) there is no danger to create it twice
  91
  92   // application and vendor name are used by wxConfig to construct the name
  93   // of the config file/registry key and must be set before the first call
  94   // to Get() if you want to override the default values (the application
  95   // name is the name of the executable and the vendor name is the same)
  96   SetVendorName("wxWindows");
  97   SetAppName("conftest"); // not needed, it's the default value
  98
  99   wxConfigBase *pConfig = wxConfigBase::Get();
 100
 101   // or you could also write something like this:
 102   //  wxFileConfig *pConfig = new wxFileConfig("conftest");
 103   //  wxConfigBase::Set(pConfig);
 104   // where you can also specify the file names explicitly if you wish.
 105   // Of course, calling Set() is optional and you only must do it if
 106   // you want to later retrieve this pointer with Get().
 107
 108   // create the main program window
 109   MyFrame *frame = new MyFrame;
 110   frame->Show(TRUE);
 111   SetTopWindow(frame);
 112
 113   // use our config object...
 114   if ( pConfig->Read("/Controls/Check", 1l) != 0 ) {
 115     wxMessageBox("You can disable this message box by unchecking\n"
 116                  "the checkbox in the main window (of course, a real\n"
 117                  "program would have a checkbox right here but we\n"
 118                  "keep it simple)", "Welcome to wxConfig demo",
 119                  wxICON_INFORMATION | wxOK);
 120   }
 121
 122   return TRUE;
 123 }
 124
 125 int MyApp::OnExit()
 126 {
 127   // clean up: Set() returns the active config object as Get() does, but unlike
 128   // Get() it doesn't try to create one if there is none (definitely not what
 129   // we want here!)
 130   delete wxConfigBase::Set((wxConfigBase *) NULL);
 131
 132   return 0;
 133 }
 134
 135 // ----------------------------------------------------------------------------
 136 // frame
 137 // ----------------------------------------------------------------------------
 138
 139 // main frame ctor
 140 MyFrame::MyFrame()
 141        : wxFrame((wxFrame *) NULL, -1, "wxConfig Demo")
 142 {
 143   // menu
 144   wxMenu *file_menu = new wxMenu;
 145
 146   file_menu->Append(Minimal_Delete, "&Delete", "Delete config file");
 147   file_menu->AppendSeparator();
 148   file_menu->Append(Minimal_About, "&About", "About this sample");
 149   file_menu->AppendSeparator();
 150   file_menu->Append(Minimal_Quit, "E&xit", "Exit the program");
 151   wxMenuBar *menu_bar = new wxMenuBar;
 152   menu_bar->Append(file_menu, "&File");
 153   SetMenuBar(menu_bar);
 154
 155   CreateStatusBar();
 156
 157   // child controls
 158   wxPanel *panel = new wxPanel(this);
 159   (void)new wxStaticText(panel, -1, "These controls remember their values!",
 160                          wxPoint(10, 10), wxSize(300, 20));
 161   m_text = new wxTextCtrl(panel, -1, "", wxPoint(10, 40), wxSize(300, 20));
 162   m_check = new wxCheckBox(panel, -1, "show welcome message box at startup",
 163                            wxPoint(10, 70), wxSize(300, 20));
 164
 165   // restore the control's values from the config
 166
 167   // NB: in this program, the config object is already created at this moment
 168   // because we had called Get() from MyApp::OnInit(). However, if you later
 169   // change the code and don't create it before this line, it won't break
 170   // anything - unlike if you manually create wxConfig object with Create()
 171   // or in any other way (then you must be sure to create it before using it!).
 172   wxConfigBase *pConfig = wxConfigBase::Get();
 173
 174   // we could write Read("/Controls/Text") as well, it's just to show SetPath()
 175   pConfig->SetPath("/Controls");
 176
 177   m_text->SetValue(pConfig->Read("Text", ""));
 178   m_check->SetValue(pConfig->Read("Check", 1l) != 0);
 179
 180   // SetPath() understands ".."
 181   pConfig->SetPath("../MainFrame");
 182
 183   // restore frame position and size
 184   int x = pConfig->Read("x", 50),
 185       y = pConfig->Read("y", 50),
 186       w = pConfig->Read("w", 350),
 187       h = pConfig->Read("h", 200);
 188   Move(x, y);
 189   SetClientSize(w, h);
 190 }
 191
 192 void MyFrame::OnQuit(wxCommandEvent&)
 193 {
 194   Close(TRUE);
 195 }
 196
 197 void MyFrame::OnAbout(wxCommandEvent&)
 198 {
 199   wxMessageBox("wxConfig demo\n© Vadim Zeitlin 1998", "About",
 200                wxICON_INFORMATION | wxOK);
 201 }
 202
 203 void MyFrame::OnDelete(wxCommandEvent&)
 204 {
 205   // VZ: it seems that DeleteAll() wreaks havoc on NT. Disabled until I
 206   // investigate it further, do _not_ compile this code in meanwhile!
 207   // JACS: wxRegConfig::DeleteAll is disabled, so it's safe to call DeleteAll,
 208   // it just won't do anything useful on Win95/NT.
 209     if ( wxConfigBase::Get()->DeleteAll() ) {
 210     wxLogMessage("Config file/registry key successfully deleted.");
 211
 212     delete wxConfigBase::Set((wxConfigBase *) NULL);
 213     wxConfigBase::DontCreateOnDemand();
 214   }
 215   else
 216     wxLogError("Deleting config file/registry key failed.");
 217 }
 218
 219 MyFrame::~MyFrame()
 220 {
 221   // save the control's values to the config
 222   wxConfigBase *pConfig = wxConfigBase::Get();
 223   if ( pConfig == NULL )
 224     return;
 225   pConfig->Write("/Controls/Text", m_text->GetValue());
 226   pConfig->Write("/Controls/Check", m_check->GetValue());
 227
 228   // save the frame position
 229   int x, y, w, h;
 230   GetClientSize(&w, &h);
 231   GetPosition(&x, &y);
 232   pConfig->Write("/MainFrame/x", (long) x);
 233   pConfig->Write("/MainFrame/y", (long) y);
 234   pConfig->Write("/MainFrame/w", (long) w);
 235   pConfig->Write("/MainFrame/h", (long) h);
 236 }