samples/validate/validate.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        validate.cpp
   3 // Purpose:     wxWindows 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->Append(VALIDATE_TOGGLE_BELL, wxT("&Bell on error"), wxT("Toggle bell on error"), true);
 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     CreateStatusBar(1);
 124 }
 125
 126 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 127 {
 128     Close(true);
 129 }
 130
 131 void MyFrame::OnTestDialog(wxCommandEvent& WXUNUSED(event))
 132 {
 133     // The validators defined in the dialog implementation bind controls
 134     // and variables together. Values are transferred between them behind
 135     // the scenes, so here we don't have to query the controls for their
 136     // values.
 137     MyDialog dialog(this, wxT("Validator demonstration"));
 138
 139     // When the dialog is displayed, validators automatically transfer
 140     // data from variables to their corresponding controls.
 141     if ( dialog.ShowModal() == wxID_OK )
 142     {
 143         // 'OK' was pressed, so controls that have validators are
 144         // automatically transferred to the variables we specified
 145         // when we created the validators.
 146         m_listbox->Clear();
 147         m_listbox->Append(wxString(_T("string: ")) + g_data.m_string);
 148         for(unsigned int i = 0; i < g_data.m_listbox_choices.GetCount(); ++i)
 149         {
 150             int j = g_data.m_listbox_choices[i];
 151             m_listbox->Append(wxString(_T("listbox choice(s): ")) + g_listbox_choices[j]);
 152         }
 153
 154         wxString checkbox_state(g_data.m_checkbox_state ? _T("checked") : _T("unchecked"));
 155         m_listbox->Append(wxString(_T("checkbox: ")) + checkbox_state);
 156         m_listbox->Append(wxString(_T("combobox: ")) + g_data.m_combobox_choice);
 157         m_listbox->Append(wxString(_T("radiobox: ")) + g_radiobox_choices[g_data.m_radiobox_choice]);
 158     }
 159 }
 160
 161 void MyFrame::OnToggleBell(wxCommandEvent& event)
 162 {
 163     m_silent = !m_silent;
 164     wxValidator::SetBellOnError(m_silent);
 165     event.Skip();
 166 }
 167
 168 // ----------------------------------------------------------------------------
 169 // MyDialog
 170 // ----------------------------------------------------------------------------
 171
 172 MyDialog::MyDialog( wxWindow *parent, const wxString& title,
 173                     const wxPoint& pos, const wxSize& size, const long WXUNUSED(style) ) :
 174     wxDialog(parent, VALIDATE_DIALOG_ID, title, pos, size, wxDEFAULT_DIALOG_STYLE|wxDIALOG_MODAL|wxRESIZE_BORDER)
 175 {
 176     // Sizers automatically ensure a workable layout.
 177     wxBoxSizer *mainsizer = new wxBoxSizer( wxVERTICAL );
 178     wxFlexGridSizer *flexgridsizer = new wxFlexGridSizer(2, 2, 5, 5);
 179
 180     // Create and add controls to sizers. Note that a member variable
 181     // of g_data is bound to each control upon construction. There is
 182     // currently no easy way to substitute a different validator or a
 183     // different transfer variable after a control has been constructed.
 184
 185     // Pointers to some of these controls are saved in member variables
 186     // so that we can use them elsewhere, like this one.
 187     text = new wxTextCtrl(this, VALIDATE_TEXT, wxT(""),
 188         wxPoint(10, 10), wxSize(120, -1), 0,
 189         wxTextValidator(wxFILTER_ALPHA, &g_data.m_string));
 190     flexgridsizer->Add(text);
 191
 192     // This wxCheckBox* doesn't need to be assigned to any pointer
 193     // because we don't use it elsewhere--it can be anonymous.
 194     // We don't need any such pointer to query its state, which
 195     // can be gotten directly from g_data.
 196     flexgridsizer->Add(new wxCheckBox(this, VALIDATE_CHECK, wxT("Sample checkbox"),
 197         wxPoint(130, 10), wxSize(120, -1), 0,
 198         wxGenericValidator(&g_data.m_checkbox_state)));
 199
 200     flexgridsizer->Add(new wxListBox((wxWindow*)this, VALIDATE_LIST,
 201         wxPoint(10, 30), wxSize(120, -1),
 202         3, g_listbox_choices, wxLB_MULTIPLE,
 203         wxGenericValidator(&g_data.m_listbox_choices)));
 204
 205     combobox = new wxComboBox((wxWindow*)this, VALIDATE_COMBO, wxT(""),
 206         wxPoint(130, 30), wxSize(120, -1),
 207         3, g_combobox_choices, 0L,
 208         wxGenericValidator(&g_data.m_combobox_choice));
 209     flexgridsizer->Add(combobox);
 210
 211     mainsizer->Add(flexgridsizer, 1, wxGROW | wxALL, 10);
 212
 213     mainsizer->Add(new wxRadioBox((wxWindow*)this, VALIDATE_RADIO, wxT("Pick a color"),
 214         wxPoint(10, 100), wxSize(-1, -1),
 215         3, g_radiobox_choices, 1, wxRA_SPECIFY_ROWS,
 216         wxGenericValidator(&g_data.m_radiobox_choice)),
 217         0, wxGROW | wxALL, 10);
 218
 219     wxGridSizer *gridsizer = new wxGridSizer(2, 2, 5, 5);
 220
 221     wxButton *ok_button = new wxButton(this, wxID_OK, wxT("OK"), wxPoint(250, 70), wxSize(80, 30));
 222     ok_button->SetDefault();
 223     gridsizer->Add(ok_button);
 224     gridsizer->Add(new wxButton(this, wxID_CANCEL, wxT("Cancel"), wxPoint(250, 100), wxSize(80, 30)));
 225
 226     mainsizer->Add(gridsizer, 0, wxGROW | wxALL, 10);
 227
 228     SetSizer(mainsizer);
 229     mainsizer->SetSizeHints(this);
 230 }
 231
 232 bool MyDialog::TransferDataToWindow()
 233 {
 234     bool r = wxDialog::TransferDataToWindow();
 235     // These function calls have to be made here, after the
 236     // dialog has been created.
 237     text->SetFocus();
 238     combobox->SetSelection(0);
 239     return r;
 240 }
 241