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 // For compilers that support precompilation, includes "wx/wx.h".
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22     #pragma hdrstop
  23 #endif // __BORLANDC__
  24
  25 #ifndef WX_PRECOMP
  26     #include "wx/wx.h"
  27 #endif // WX_PRECOMP
  28
  29 #include "validate.h"
  30
  31 #include "wx/sizer.h"
  32 #include "wx/valgen.h"
  33 #include "wx/valtext.h"
  34
  35 #ifndef __WXMSW__
  36     #include "../sample.xpm"
  37 #endif
  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 (doesn't validate)"), wxT("maybe (doesn't validate)")};
  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.
  63     m_string = wxT("Spaces are invalid here");
  64     m_listbox_choices.Add(0);
  65 }
  66
  67
  68 // ----------------------------------------------------------------------------
  69 // MyComboBoxValidator
  70 // ----------------------------------------------------------------------------
  71
  72 bool MyComboBoxValidator::Validate(wxWindow *WXUNUSED(parent))
  73 {
  74     wxASSERT(GetWindow()->IsKindOf(CLASSINFO(wxComboBox)));
  75
  76     wxComboBox* cb = (wxComboBox*)GetWindow();
  77     if (cb->GetValue() == g_combobox_choices[1] ||
  78         cb->GetValue() == g_combobox_choices[2])
  79     {
  80         // we accept any string != g_combobox_choices[1|2] !
  81
  82         wxLogError("Invalid combo box text!");
  83         return false;
  84     }
  85
  86     if (m_var)
  87         *m_var = cb->GetValue();
  88
  89     return true;
  90 }
  91
  92 bool MyComboBoxValidator::TransferToWindow()
  93 {
  94     wxASSERT(GetWindow()->IsKindOf(CLASSINFO(wxComboBox)));
  95
  96     if ( m_var )
  97     {
  98         wxComboBox* cb = (wxComboBox*)GetWindow();
  99         if ( !cb )
 100             return false;
 101
 102         cb->SetValue(*m_var);
 103     }
 104
 105     return true;
 106 }
 107
 108 bool MyComboBoxValidator::TransferFromWindow()
 109 {
 110     wxASSERT(GetWindow()->IsKindOf(CLASSINFO(wxComboBox)));
 111
 112     if ( m_var )
 113     {
 114         wxComboBox* cb = (wxComboBox*)GetWindow();
 115         if ( !cb )
 116             return false;
 117
 118         *m_var = cb->GetValue();
 119     }
 120
 121     return true;
 122 }
 123
 124 // ----------------------------------------------------------------------------
 125 // MyApp
 126 // ----------------------------------------------------------------------------
 127
 128 IMPLEMENT_APP(MyApp)
 129
 130 bool MyApp::OnInit()
 131 {
 132     if ( !wxApp::OnInit() )
 133         return false;
 134
 135     // Create and display the main frame window.
 136     MyFrame *frame = new MyFrame((wxFrame *) NULL, wxT("Validator Test"),
 137                                  50, 50, 300, 250);
 138     frame->Show(true);
 139     SetTopWindow(frame);
 140     return true;
 141 }
 142
 143 // ----------------------------------------------------------------------------
 144 // MyFrame
 145 // ----------------------------------------------------------------------------
 146
 147 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 148     EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
 149     EVT_MENU(VALIDATE_TEST_DIALOG, MyFrame::OnTestDialog)
 150     EVT_MENU(VALIDATE_TOGGLE_BELL, MyFrame::OnToggleBell)
 151 END_EVENT_TABLE()
 152
 153 MyFrame::MyFrame(wxFrame *frame, const wxString&title, int x, int y, int w, int h)
 154        : wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h)),
 155          m_silent(true)
 156 {
 157     SetIcon(wxICON(sample));
 158
 159     // Create a listbox to display the validated data.
 160     m_listbox = new wxListBox(this, wxID_ANY);
 161     m_listbox->Append(wxString(_T("Try 'File|Test' to see how validators work.")));
 162
 163     wxMenu *file_menu = new wxMenu;
 164
 165     file_menu->Append(VALIDATE_TEST_DIALOG, wxT("&Test"), wxT("Demonstrate validators"));
 166     file_menu->AppendCheckItem(VALIDATE_TOGGLE_BELL, wxT("&Bell on error"), wxT("Toggle bell on error"));
 167     file_menu->AppendSeparator();
 168     file_menu->Append(wxID_EXIT, wxT("E&xit"));
 169
 170     wxMenuBar *menu_bar = new wxMenuBar;
 171     menu_bar->Append(file_menu, wxT("&File"));
 172     SetMenuBar(menu_bar);
 173
 174     // All validators share a common (static) flag that controls
 175     // whether they beep on error. Here we turn it off:
 176     wxValidator::SetBellOnError(m_silent);
 177     file_menu->Check(VALIDATE_TOGGLE_BELL, !wxValidator::IsSilent());
 178
 179 #if wxUSE_STATUSBAR
 180     CreateStatusBar(1);
 181 #endif // wxUSE_STATUSBAR
 182 }
 183
 184 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 185 {
 186     Close(true);
 187 }
 188
 189 void MyFrame::OnTestDialog(wxCommandEvent& WXUNUSED(event))
 190 {
 191     // The validators defined in the dialog implementation bind controls
 192     // and variables together. Values are transferred between them behind
 193     // the scenes, so here we don't have to query the controls for their
 194     // values.
 195     MyDialog dialog(this, wxT("Validator demonstration"));
 196
 197     // When the dialog is displayed, validators automatically transfer
 198     // data from variables to their corresponding controls.
 199     if ( dialog.ShowModal() == wxID_OK )
 200     {
 201         // 'OK' was pressed, so controls that have validators are
 202         // automatically transferred to the variables we specified
 203         // when we created the validators.
 204         m_listbox->Clear();
 205         m_listbox->Append(wxString(_T("string: ")) + g_data.m_string);
 206         for(unsigned int i = 0; i < g_data.m_listbox_choices.GetCount(); ++i)
 207         {
 208             int j = g_data.m_listbox_choices[i];
 209             m_listbox->Append(wxString(_T("listbox choice(s): ")) + g_listbox_choices[j]);
 210         }
 211
 212         wxString checkbox_state(g_data.m_checkbox_state ? _T("checked") : _T("unchecked"));
 213         m_listbox->Append(wxString(_T("checkbox: ")) + checkbox_state);
 214         m_listbox->Append(wxString(_T("combobox: ")) + g_data.m_combobox_choice);
 215         m_listbox->Append(wxString(_T("radiobox: ")) + g_radiobox_choices[g_data.m_radiobox_choice]);
 216     }
 217 }
 218
 219 void MyFrame::OnToggleBell(wxCommandEvent& event)
 220 {
 221     m_silent = !m_silent;
 222     wxValidator::SetBellOnError(m_silent);
 223     event.Skip();
 224 }
 225
 226 // ----------------------------------------------------------------------------
 227 // MyDialog
 228 // ----------------------------------------------------------------------------
 229
 230 MyDialog::MyDialog( wxWindow *parent, const wxString& title,
 231                     const wxPoint& pos, const wxSize& size, const long WXUNUSED(style) ) :
 232     wxDialog(parent, VALIDATE_DIALOG_ID, title, pos, size, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
 233 {
 234     // setup the flex grid sizer
 235     // -------------------------
 236
 237     wxFlexGridSizer *flexgridsizer = new wxFlexGridSizer(2, 2, 5, 5);
 238
 239     // Create and add controls to sizers. Note that a member variable
 240     // of g_data is bound to each control upon construction. There is
 241     // currently no easy way to substitute a different validator or a
 242     // different transfer variable after a control has been constructed.
 243
 244     // Pointers to some of these controls are saved in member variables
 245     // so that we can use them elsewhere, like this one.
 246     m_text = new wxTextCtrl(this, VALIDATE_TEXT, wxEmptyString,
 247                             wxDefaultPosition, wxDefaultSize, 0,
 248                             wxTextValidator(wxFILTER_ALPHA, &g_data.m_string));
 249     flexgridsizer->Add(m_text, 1, wxGROW);
 250
 251     // This wxCheckBox* doesn't need to be assigned to any pointer
 252     // because we don't use it elsewhere--it can be anonymous.
 253     // We don't need any such pointer to query its state, which
 254     // can be gotten directly from g_data.
 255     flexgridsizer->Add(new wxCheckBox(this, VALIDATE_CHECK, wxT("Sample checkbox"),
 256                         wxPoint(130, 10), wxSize(120, wxDefaultCoord), 0,
 257                         wxGenericValidator(&g_data.m_checkbox_state)),
 258                        1, wxALIGN_CENTER);
 259
 260     flexgridsizer->Add(new wxListBox((wxWindow*)this, VALIDATE_LIST,
 261                         wxPoint(10, 30), wxSize(120, wxDefaultCoord),
 262                         3, g_listbox_choices, wxLB_MULTIPLE,
 263                         wxGenericValidator(&g_data.m_listbox_choices)),
 264                        1, wxGROW);
 265
 266     m_combobox = new wxComboBox(this, VALIDATE_COMBO, wxEmptyString,
 267                                 wxPoint(130, 30), wxSize(120, wxDefaultCoord),
 268                                 3, g_combobox_choices, 0L,
 269                                 MyComboBoxValidator(&g_data.m_combobox_choice));
 270     flexgridsizer->Add(m_combobox, 1, wxALIGN_CENTER);
 271
 272     flexgridsizer->AddGrowableCol(0);
 273     flexgridsizer->AddGrowableCol(1);
 274     flexgridsizer->AddGrowableRow(1);
 275
 276
 277     // setup the button sizer
 278     // ----------------------
 279
 280     wxStdDialogButtonSizer *btn = new wxStdDialogButtonSizer();
 281     btn->AddButton(new wxButton(this, wxID_OK));
 282     btn->AddButton(new wxButton(this, wxID_CANCEL));
 283     btn->Realize();
 284
 285
 286     // setup the main sizer
 287     // --------------------
 288
 289     wxBoxSizer *mainsizer = new wxBoxSizer( wxVERTICAL );
 290
 291     mainsizer->Add(flexgridsizer, 1, wxGROW | wxALL, 10);
 292
 293     mainsizer->Add(new wxRadioBox((wxWindow*)this, VALIDATE_RADIO, wxT("Pick a color"),
 294                                     wxPoint(10, 100), wxDefaultSize,
 295                                     3, g_radiobox_choices, 1, wxRA_SPECIFY_ROWS,
 296                                     wxGenericValidator(&g_data.m_radiobox_choice)),
 297                    0, wxGROW | wxLEFT|wxBOTTOM|wxRIGHT, 10);
 298
 299     mainsizer->Add(btn, 0, wxGROW | wxALL, 10);
 300
 301     SetSizer(mainsizer);
 302     mainsizer->SetSizeHints(this);
 303
 304     // make the dialog a bit bigger than its minimal size:
 305     SetSize(GetBestSize()*1.5);
 306 }
 307
 308 bool MyDialog::TransferDataToWindow()
 309 {
 310     bool r = wxDialog::TransferDataToWindow();
 311
 312     // These function calls have to be made here, after the
 313     // dialog has been created.
 314     m_text->SetFocus();
 315     m_combobox->SetSelection(0);
 316
 317     return r;
 318 }
 319