samples/validate/validate.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        validate.cpp
   3 // Purpose:     wxWidgets validator sample
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // See online help for an overview of validators. In general, a
  13 // validator transfers data between a control and a variable.
  14 // It may also test for validity of a string transferred to or
  15 // from a text control. All validators transfer data, but not
  16 // all test validity, so don't be confused by the name.
  17
  18 #if defined(__GNUG__) && !defined(__APPLE__)
  19 #   pragma implementation
  20 #endif // __GNUG__
  21
  22 // For compilers that support precompilation, includes "wx/wx.h".
  23 #include "wx/wxprec.h"
  24
  25 #ifdef __BORLANDC__
  26 #   pragma hdrstop
  27 #endif // __BORLANDC__
  28
  29 #ifndef WX_PRECOMP
  30 #   include "wx/wx.h"
  31 #endif // WX_PRECOMP
  32
  33 #include "validate.h"
  34
  35 #include "wx/sizer.h"
  36 #include "wx/valgen.h"
  37 #include "wx/valtext.h"
  38
  39 // ----------------------------------------------------------------------------
  40 // Global data
  41 // ----------------------------------------------------------------------------
  42
  43 MyData g_data;
  44
  45 wxString g_listbox_choices[] =
  46     {wxT("one"),  wxT("two"),  wxT("three")};
  47
  48 wxString g_combobox_choices[] =
  49     {wxT("yes"), wxT("no"), wxT("maybe")};
  50
  51 wxString g_radiobox_choices[] =
  52     {wxT("green"), wxT("yellow"), wxT("red")};
  53
  54 // ----------------------------------------------------------------------------
  55 // MyData
  56 // ----------------------------------------------------------------------------
  57
  58 MyData::MyData()
  59 {
  60     // This string will be passed to an alpha-only validator, which
  61     // will complain because spaces aren't alpha. Note that validation
  62     // is performed only when 'OK' is pressed. It would be nice to
  63     // enhance this so that validation would occur when the text
  64     // control loses focus.
  65     m_string = wxT("Spaces are invalid here");
  66     m_listbox_choices.Add(0);
  67 }
  68
  69 // ----------------------------------------------------------------------------
  70 // MyApp
  71 // ----------------------------------------------------------------------------
  72
  73 IMPLEMENT_APP(MyApp)
  74
  75 bool MyApp::OnInit()
  76 {
  77     // Create and display the main frame window.
  78     MyFrame *frame = new MyFrame((wxFrame *) NULL, wxT("Validator Test"),
  79                                  50, 50, 300, 250);
  80     frame->Show(true);
  81     SetTopWindow(frame);
  82     return true;
  83 }
  84
  85 // ----------------------------------------------------------------------------
  86 // MyFrame
  87 // ----------------------------------------------------------------------------
  88
  89 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  90     EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
  91     EVT_MENU(VALIDATE_TEST_DIALOG, MyFrame::OnTestDialog)
  92     EVT_MENU(VALIDATE_TOGGLE_BELL, MyFrame::OnToggleBell)
  93 END_EVENT_TABLE()
  94
  95 MyFrame::MyFrame(wxFrame *frame, const wxString&title, int x, int y, int w, int h)
  96        : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)),
  97          m_silent(true)
  98 {
  99 #ifdef __WXMSW__
 100     SetIcon(wxIcon(_T("mondrian")));
 101 #endif // __WXMSW__
 102
 103     // Create a listbox to display the validated data.
 104     m_listbox = new wxListBox(this, -1);
 105     m_listbox->Append(wxString(_T("Try 'File|Test' to see how validators work.")));
 106
 107     wxMenu *file_menu = new wxMenu;
 108
 109     file_menu->Append(VALIDATE_TEST_DIALOG, wxT("&Test"), wxT("Demonstrate validators"));
 110     file_menu->AppendCheckItem(VALIDATE_TOGGLE_BELL, wxT("&Bell on error"), wxT("Toggle bell on error"));
 111     file_menu->AppendSeparator();
 112     file_menu->Append(wxID_EXIT, wxT("E&xit"));
 113
 114     wxMenuBar *menu_bar = new wxMenuBar;
 115     menu_bar->Append(file_menu, wxT("File"));
 116     SetMenuBar(menu_bar);
 117
 118     // All validators share a common (static) flag that controls
 119     // whether they beep on error. Here we turn it off:
 120     wxValidator::SetBellOnError(m_silent);
 121     file_menu->Check(VALIDATE_TOGGLE_BELL, !wxValidator::IsSilent());
 122
 123 #if wxUSE_STATUSBAR
 124     CreateStatusBar(1);
 125 #endif // wxUSE_STATUSBAR
 126 }
 127
 128 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 129 {
 130     Close(true);
 131 }
 132
 133 void MyFrame::OnTestDialog(wxCommandEvent& WXUNUSED(event))
 134 {
 135     // The validators defined in the dialog implementation bind controls
 136     // and variables together. Values are transferred between them behind
 137     // the scenes, so here we don't have to query the controls for their
 138     // values.
 139     MyDialog dialog(this, wxT("Validator demonstration"));
 140
 141     // When the dialog is displayed, validators automatically transfer
 142     // data from variables to their corresponding controls.
 143     if ( dialog.ShowModal() == wxID_OK )
 144     {
 145         // 'OK' was pressed, so controls that have validators are
 146         // automatically transferred to the variables we specified
 147         // when we created the validators.
 148         m_listbox->Clear();
 149         m_listbox->Append(wxString(_T("string: ")) + g_data.m_string);
 150         for(unsigned int i = 0; i < g_data.m_listbox_choices.GetCount(); ++i)
 151         {
 152             int j = g_data.m_listbox_choices[i];
 153             m_listbox->Append(wxString(_T("listbox choice(s): ")) + g_listbox_choices[j]);
 154         }
 155
 156         wxString checkbox_state(g_data.m_checkbox_state ? _T("checked") : _T("unchecked"));
 157         m_listbox->Append(wxString(_T("checkbox: ")) + checkbox_state);
 158         m_listbox->Append(wxString(_T("combobox: ")) + g_data.m_combobox_choice);
 159         m_listbox->Append(wxString(_T("radiobox: ")) + g_radiobox_choices[g_data.m_radiobox_choice]);
 160     }
 161 }
 162
 163 void MyFrame::OnToggleBell(wxCommandEvent& event)
 164 {
 165     m_silent = !m_silent;
 166     wxValidator::SetBellOnError(m_silent);
 167     event.Skip();
 168 }
 169
 170 // ----------------------------------------------------------------------------
 171 // MyDialog
 172 // ----------------------------------------------------------------------------
 173
 174 MyDialog::MyDialog( wxWindow *parent, const wxString& title,
 175                     const wxPoint& pos, const wxSize& size, const long WXUNUSED(style) ) :
 176     wxDialog(parent, VALIDATE_DIALOG_ID, title, pos, size, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
 177 {
 178     // Sizers automatically ensure a workable layout.
 179     wxBoxSizer *mainsizer = new wxBoxSizer( wxVERTICAL );
 180     wxFlexGridSizer *flexgridsizer = new wxFlexGridSizer(2, 2, 5, 5);
 181
 182     // Create and add controls to sizers. Note that a member variable
 183     // of g_data is bound to each control upon construction. There is
 184     // currently no easy way to substitute a different validator or a
 185     // different transfer variable after a control has been constructed.
 186
 187     // Pointers to some of these controls are saved in member variables
 188     // so that we can use them elsewhere, like this one.
 189     text = new wxTextCtrl(this, VALIDATE_TEXT, wxT(""),
 190         wxPoint(10, 10), wxSize(120, -1), 0,
 191         wxTextValidator(wxFILTER_ALPHA, &g_data.m_string));
 192     flexgridsizer->Add(text);
 193
 194     // This wxCheckBox* doesn't need to be assigned to any pointer
 195     // because we don't use it elsewhere--it can be anonymous.
 196     // We don't need any such pointer to query its state, which
 197     // can be gotten directly from g_data.
 198     flexgridsizer->Add(new wxCheckBox(this, VALIDATE_CHECK, wxT("Sample checkbox"),
 199         wxPoint(130, 10), wxSize(120, -1), 0,
 200         wxGenericValidator(&g_data.m_checkbox_state)));
 201
 202     flexgridsizer->Add(new wxListBox((wxWindow*)this, VALIDATE_LIST,
 203         wxPoint(10, 30), wxSize(120, -1),
 204         3, g_listbox_choices, wxLB_MULTIPLE,
 205         wxGenericValidator(&g_data.m_listbox_choices)));
 206
 207     combobox = new wxComboBox((wxWindow*)this, VALIDATE_COMBO, wxT(""),
 208         wxPoint(130, 30), wxSize(120, -1),
 209         3, g_combobox_choices, 0L,
 210         wxGenericValidator(&g_data.m_combobox_choice));
 211     flexgridsizer->Add(combobox);
 212
 213     mainsizer->Add(flexgridsizer, 1, wxGROW | wxALL, 10);
 214
 215     mainsizer->Add(new wxRadioBox((wxWindow*)this, VALIDATE_RADIO, wxT("Pick a color"),
 216         wxPoint(10, 100), wxSize(-1, -1),
 217         3, g_radiobox_choices, 1, wxRA_SPECIFY_ROWS,
 218         wxGenericValidator(&g_data.m_radiobox_choice)),
 219         0, wxGROW | wxALL, 10);
 220
 221     wxGridSizer *gridsizer = new wxGridSizer(2, 2, 5, 5);
 222
 223     wxButton *ok_button = new wxButton(this, wxID_OK, wxT("OK"), wxPoint(250, 70), wxSize(80, 30));
 224     ok_button->SetDefault();
 225     gridsizer->Add(ok_button);
 226     gridsizer->Add(new wxButton(this, wxID_CANCEL, wxT("Cancel"), wxPoint(250, 100), wxSize(80, 30)));
 227
 228     mainsizer->Add(gridsizer, 0, wxGROW | wxALL, 10);
 229
 230     SetSizer(mainsizer);
 231     mainsizer->SetSizeHints(this);
 232 }
 233
 234 bool MyDialog::TransferDataToWindow()
 235 {
 236     bool r = wxDialog::TransferDataToWindow();
 237     // These function calls have to be made here, after the
 238     // dialog has been created.
 239     text->SetFocus();
 240     combobox->SetSelection(0);
 241     return r;
 242 }
 243