src/common/dlgcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/dlgcmn.cpp
   3 // Purpose:     common (to all ports) wxDialog functions
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     28.06.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/dialog.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/button.h"
  31     #include "wx/dcclient.h"
  32     #include "wx/intl.h"
  33     #include "wx/settings.h"
  34     #include "wx/stattext.h"
  35     #include "wx/sizer.h"
  36     #include "wx/containr.h"
  37 #endif
  38
  39 #include "wx/statline.h"
  40 #include "wx/sysopt.h"
  41
  42 #if wxUSE_STATTEXT
  43
  44 // ----------------------------------------------------------------------------
  45 // wxTextWrapper
  46 // ----------------------------------------------------------------------------
  47
  48 // this class is used to wrap the text on word boundary: wrapping is done by
  49 // calling OnStartLine() and OnOutputLine() functions
  50 class wxTextWrapper
  51 {
  52 public:
  53     wxTextWrapper() { m_eol = false; }
  54
  55     // win is used for getting the font, text is the text to wrap, width is the
  56     // max line width or -1 to disable wrapping
  57     void Wrap(wxWindow *win, const wxString& text, int widthMax);
  58
  59     // we don't need it, but just to avoid compiler warnings
  60     virtual ~wxTextWrapper() { }
  61
  62 protected:
  63     // line may be empty
  64     virtual void OnOutputLine(const wxString& line) = 0;
  65
  66     // called at the start of every new line (except the very first one)
  67     virtual void OnNewLine() { }
  68
  69 private:
  70     // call OnOutputLine() and set m_eol to true
  71     void DoOutputLine(const wxString& line)
  72     {
  73         OnOutputLine(line);
  74
  75         m_eol = true;
  76     }
  77
  78     // this function is a destructive inspector: when it returns true it also
  79     // resets the flag to false so calling it again woulnd't return true any
  80     // more
  81     bool IsStartOfNewLine()
  82     {
  83         if ( !m_eol )
  84             return false;
  85
  86         m_eol = false;
  87
  88         return true;
  89     }
  90
  91
  92     bool m_eol;
  93 };
  94
  95 #endif // wxUSE_STATTEXT
  96
  97 // ----------------------------------------------------------------------------
  98 // wxDialogBase
  99 // ----------------------------------------------------------------------------
 100
 101 BEGIN_EVENT_TABLE(wxDialogBase, wxTopLevelWindow)
 102     EVT_BUTTON(wxID_ANY, wxDialogBase::OnButton)
 103
 104     EVT_CLOSE(wxDialogBase::OnCloseWindow)
 105
 106     EVT_CHAR_HOOK(wxDialogBase::OnCharHook)
 107
 108     WX_EVENT_TABLE_CONTROL_CONTAINER(wxDialogBase)
 109 END_EVENT_TABLE()
 110
 111 WX_DELEGATE_TO_CONTROL_CONTAINER(wxDialogBase, wxTopLevelWindow)
 112
 113 void wxDialogBase::Init()
 114 {
 115     m_returnCode = 0;
 116     m_affirmativeId = wxID_OK;
 117     m_escapeId = wxID_ANY;
 118
 119     // the dialogs have this flag on by default to prevent the events from the
 120     // dialog controls from reaching the parent frame which is usually
 121     // undesirable and can lead to unexpected and hard to find bugs
 122     SetExtraStyle(GetExtraStyle() | wxWS_EX_BLOCK_EVENTS);
 123
 124     WX_INIT_CONTROL_CONTAINER();
 125 }
 126
 127 #if wxUSE_STATTEXT
 128
 129 void wxTextWrapper::Wrap(wxWindow *win, const wxString& text, int widthMax)
 130 {
 131     const wxChar *lastSpace = NULL;
 132     wxString line;
 133
 134     const wxChar *lineStart = text.c_str();
 135     for ( const wxChar *p = lineStart; ; p++ )
 136     {
 137         if ( IsStartOfNewLine() )
 138         {
 139             OnNewLine();
 140
 141             lastSpace = NULL;
 142             line.clear();
 143             lineStart = p;
 144         }
 145
 146         if ( *p == _T('\n') || *p == _T('\0') )
 147         {
 148             DoOutputLine(line);
 149
 150             if ( *p == _T('\0') )
 151                 break;
 152         }
 153         else // not EOL
 154         {
 155             if ( *p == _T(' ') )
 156                 lastSpace = p;
 157
 158             line += *p;
 159
 160             if ( widthMax >= 0 && lastSpace )
 161             {
 162                 int width;
 163                 win->GetTextExtent(line, &width, NULL);
 164
 165                 if ( width > widthMax )
 166                 {
 167                     // remove the last word from this line
 168                     line.erase(lastSpace - lineStart, p + 1 - lineStart);
 169                     DoOutputLine(line);
 170
 171                     // go back to the last word of this line which we didn't
 172                     // output yet
 173                     p = lastSpace;
 174                 }
 175             }
 176             //else: no wrapping at all or impossible to wrap
 177         }
 178     }
 179 }
 180
 181 class wxTextSizerWrapper : public wxTextWrapper
 182 {
 183 public:
 184     wxTextSizerWrapper(wxWindow *win)
 185     {
 186         m_win = win;
 187         m_hLine = 0;
 188     }
 189
 190     wxSizer *CreateSizer(const wxString& text, int widthMax)
 191     {
 192         m_sizer = new wxBoxSizer(wxVERTICAL);
 193         Wrap(m_win, text, widthMax);
 194         return m_sizer;
 195     }
 196
 197 protected:
 198     virtual void OnOutputLine(const wxString& line)
 199     {
 200         if ( !line.empty() )
 201         {
 202             m_sizer->Add(new wxStaticText(m_win, wxID_ANY, line));
 203         }
 204         else // empty line, no need to create a control for it
 205         {
 206             if ( !m_hLine )
 207                 m_hLine = m_win->GetCharHeight();
 208
 209             m_sizer->Add(5, m_hLine);
 210         }
 211     }
 212
 213 private:
 214     wxWindow *m_win;
 215     wxSizer *m_sizer;
 216     int m_hLine;
 217 };
 218
 219 wxSizer *wxDialogBase::CreateTextSizer(const wxString& message)
 220 {
 221     // I admit that this is complete bogus, but it makes
 222     // message boxes work for pda screens temporarily..
 223     int widthMax = -1;
 224     const bool is_pda = wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA;
 225     if (is_pda)
 226     {
 227         widthMax = wxSystemSettings::GetMetric( wxSYS_SCREEN_X ) - 25;
 228     }
 229
 230     // '&' is used as accel mnemonic prefix in the wxWidgets controls but in
 231     // the static messages created by CreateTextSizer() (used by wxMessageBox,
 232     // for example), we don't want this special meaning, so we need to quote it
 233     wxString text(message);
 234     text.Replace(_T("&"), _T("&&"));
 235
 236     wxTextSizerWrapper wrapper(this);
 237
 238     return wrapper.CreateSizer(text, widthMax);
 239 }
 240
 241 class wxLabelWrapper : public wxTextWrapper
 242 {
 243 public:
 244     void WrapLabel(wxWindow *text, int widthMax)
 245     {
 246         m_text.clear();
 247         Wrap(text, text->GetLabel(), widthMax);
 248         text->SetLabel(m_text);
 249     }
 250
 251 protected:
 252     virtual void OnOutputLine(const wxString& line)
 253     {
 254         m_text += line;
 255     }
 256
 257     virtual void OnNewLine()
 258     {
 259         m_text += _T('\n');
 260     }
 261
 262 private:
 263     wxString m_text;
 264 };
 265
 266 // NB: don't "factor out" the scope operator, SGI MIPSpro 7.3 (but not 7.4)
 267 //     gets confused if it doesn't immediately follow the class name
 268 void
 269 #if defined(__WXGTK__) && !defined(__WXUNIVERSAL__)
 270 wxStaticText::
 271 #else
 272 wxStaticTextBase::
 273 #endif
 274 Wrap(int width)
 275 {
 276     wxLabelWrapper wrapper;
 277     wrapper.WrapLabel(this, width);
 278 }
 279
 280 #endif // wxUSE_STATTEXT
 281
 282 wxSizer *wxDialogBase::CreateButtonSizer(long flags)
 283 {
 284     wxSizer *sizer = NULL;
 285
 286 #ifdef __SMARTPHONE__
 287     wxDialog* dialog = (wxDialog*) this;
 288     if ( flags & wxOK )
 289         dialog->SetLeftMenu(wxID_OK);
 290
 291     if ( flags & wxCANCEL )
 292         dialog->SetRightMenu(wxID_CANCEL);
 293
 294     if ( flags & wxYES )
 295         dialog->SetLeftMenu(wxID_YES);
 296
 297     if ( flags & wxNO )
 298         dialog->SetRightMenu(wxID_NO);
 299 #else // !__SMARTPHONE__
 300
 301 #if wxUSE_BUTTON
 302
 303 #ifdef __POCKETPC__
 304     // PocketPC guidelines recommend for Ok/Cancel dialogs to use OK button
 305     // located inside caption bar and implement Cancel functionality through
 306     // Undo outside dialog. As native behaviour this will be default here but
 307     // can be replaced with real wxButtons by setting the option below to 1
 308     if ( (flags & ~(wxCANCEL|wxNO_DEFAULT)) != wxOK ||
 309             wxSystemOptions::GetOptionInt(wxT("wince.dialog.real-ok-cancel")) )
 310 #endif // __POCKETPC__
 311     {
 312         sizer = CreateStdDialogButtonSizer(flags);
 313     }
 314 #endif // wxUSE_BUTTON
 315
 316 #endif // __SMARTPHONE__/!__SMARTPHONE__
 317
 318     return sizer;
 319 }
 320
 321 wxSizer *wxDialogBase::CreateSeparatedButtonSizer(long flags)
 322 {
 323     wxSizer *sizer = CreateButtonSizer(flags);
 324     if ( !sizer )
 325         return NULL;
 326
 327     // Mac Human Interface Guidelines recommend not to use static lines as
 328     // grouping elements
 329 #if wxUSE_STATLINE && !defined(__WXMAC__)
 330     wxBoxSizer *topsizer = new wxBoxSizer(wxVERTICAL);
 331     topsizer->Add(new wxStaticLine(this),
 332                    wxSizerFlags().Expand().DoubleBorder(wxBOTTOM));
 333     topsizer->Add(sizer, wxSizerFlags().Expand());
 334     sizer = topsizer;
 335 #endif // wxUSE_STATLINE
 336
 337     return sizer;
 338 }
 339
 340 #if wxUSE_BUTTON
 341
 342 wxStdDialogButtonSizer *wxDialogBase::CreateStdDialogButtonSizer( long flags )
 343 {
 344     wxStdDialogButtonSizer *sizer = new wxStdDialogButtonSizer();
 345
 346     wxButton *ok = NULL;
 347     wxButton *yes = NULL;
 348     wxButton *no = NULL;
 349
 350     if (flags & wxOK)
 351     {
 352         ok = new wxButton(this, wxID_OK);
 353         sizer->AddButton(ok);
 354     }
 355
 356     if (flags & wxCANCEL)
 357     {
 358         wxButton *cancel = new wxButton(this, wxID_CANCEL);
 359         sizer->AddButton(cancel);
 360     }
 361
 362     if (flags & wxYES)
 363     {
 364         yes = new wxButton(this, wxID_YES);
 365         sizer->AddButton(yes);
 366     }
 367
 368     if (flags & wxNO)
 369     {
 370         no = new wxButton(this, wxID_NO);
 371         sizer->AddButton(no);
 372     }
 373
 374     if (flags & wxHELP)
 375     {
 376         wxButton *help = new wxButton(this, wxID_HELP);
 377         sizer->AddButton(help);
 378     }
 379
 380     if (flags & wxNO_DEFAULT)
 381     {
 382         if (no)
 383         {
 384             no->SetDefault();
 385             no->SetFocus();
 386         }
 387     }
 388     else
 389     {
 390         if (ok)
 391         {
 392             ok->SetDefault();
 393             ok->SetFocus();
 394         }
 395         else if (yes)
 396         {
 397             yes->SetDefault();
 398             yes->SetFocus();
 399         }
 400     }
 401
 402     if (flags & wxOK)
 403         SetAffirmativeId(wxID_OK);
 404     else if (flags & wxYES)
 405         SetAffirmativeId(wxID_YES);
 406
 407     sizer->Realize();
 408
 409     return sizer;
 410 }
 411
 412 #endif // wxUSE_BUTTON
 413
 414 // ----------------------------------------------------------------------------
 415 // standard buttons handling
 416 // ----------------------------------------------------------------------------
 417
 418 void wxDialogBase::EndDialog(int rc)
 419 {
 420     if ( IsModal() )
 421         EndModal(rc);
 422     else
 423         Hide();
 424 }
 425
 426 void wxDialogBase::AcceptAndClose()
 427 {
 428     if ( Validate() && TransferDataFromWindow() )
 429     {
 430         EndDialog(m_affirmativeId);
 431     }
 432 }
 433
 434 void wxDialogBase::SetAffirmativeId(int affirmativeId)
 435 {
 436     m_affirmativeId = affirmativeId;
 437 }
 438
 439 void wxDialogBase::SetEscapeId(int escapeId)
 440 {
 441     m_escapeId = escapeId;
 442 }
 443
 444 bool wxDialogBase::EmulateButtonClickIfPresent(int id)
 445 {
 446 #if wxUSE_BUTTON
 447     wxButton *btn = wxDynamicCast(FindWindow(id), wxButton);
 448
 449     if ( !btn || !btn->IsEnabled() || !btn->IsShown() )
 450         return false;
 451
 452     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, id);
 453     event.SetEventObject(btn);
 454     btn->GetEventHandler()->ProcessEvent(event);
 455
 456     return true;
 457 #else // !wxUSE_BUTTON
 458     wxUnusedVar(id);
 459     return false;
 460 #endif // wxUSE_BUTTON/!wxUSE_BUTTON
 461 }
 462
 463 bool wxDialogBase::IsEscapeKey(const wxKeyEvent& event)
 464 {
 465     // for most platforms, Esc key is used to close the dialogs
 466     return event.GetKeyCode() == WXK_ESCAPE &&
 467                 event.GetModifiers() == wxMOD_NONE;
 468 }
 469
 470 void wxDialogBase::OnCharHook(wxKeyEvent& event)
 471 {
 472     if ( event.GetKeyCode() == WXK_ESCAPE )
 473     {
 474         int idCancel = GetEscapeId();
 475         switch ( idCancel )
 476         {
 477             case wxID_NONE:
 478                 // don't handle Esc specially at all
 479                 break;
 480
 481             case wxID_ANY:
 482                 // this value is special: it means translate Esc to wxID_CANCEL
 483                 // but if there is no such button, then fall back to wxID_OK
 484                 if ( EmulateButtonClickIfPresent(wxID_CANCEL) )
 485                     return;
 486                 idCancel = GetAffirmativeId();
 487                 // fall through
 488
 489             default:
 490                 // translate Esc to button press for the button with given id
 491                 if ( EmulateButtonClickIfPresent(idCancel) )
 492                     return;
 493         }
 494     }
 495
 496     event.Skip();
 497 }
 498
 499 void wxDialogBase::OnButton(wxCommandEvent& event)
 500 {
 501     const int id = event.GetId();
 502     if ( id == GetAffirmativeId() )
 503     {
 504         AcceptAndClose();
 505     }
 506     else if ( id == wxID_APPLY )
 507     {
 508         if ( Validate() )
 509             TransferDataFromWindow();
 510
 511         // TODO: disable the Apply button until things change again
 512     }
 513     else if ( id == GetEscapeId() ||
 514                 (id == wxID_CANCEL && GetEscapeId() == wxID_ANY) )
 515     {
 516         EndDialog(wxID_CANCEL);
 517     }
 518     else // not a standard button
 519     {
 520         event.Skip();
 521     }
 522 }
 523
 524 // ----------------------------------------------------------------------------
 525 // other event handlers
 526 // ----------------------------------------------------------------------------
 527
 528 void wxDialogBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 529 {
 530     // We'll send a Cancel message by default, which may close the dialog.
 531     // Check for looping if the Cancel event handler calls Close().
 532
 533     // Note that if a cancel button and handler aren't present in the dialog,
 534     // nothing will happen when you close the dialog via the window manager, or
 535     // via Close(). We wouldn't want to destroy the dialog by default, since
 536     // the dialog may have been created on the stack. However, this does mean
 537     // that calling dialog->Close() won't delete the dialog unless the handler
 538     // for wxID_CANCEL does so. So use Destroy() if you want to be sure to
 539     // destroy the dialog. The default OnCancel (above) simply ends a modal
 540     // dialog, and hides a modeless dialog.
 541
 542     // VZ: this is horrible and MT-unsafe. Can't we reuse some of these global
 543     //     lists here? don't dare to change it now, but should be done later!
 544     static wxList closing;
 545
 546     if ( closing.Member(this) )
 547         return;
 548
 549     closing.Append(this);
 550
 551     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 552     cancelEvent.SetEventObject( this );
 553     GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 554
 555     closing.DeleteObject(this);
 556 }
 557
 558 void wxDialogBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 559 {
 560   SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 561   Refresh();
 562 }