src/mac/carbon/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        combobox.cpp
   3 // Purpose:     wxComboBox class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "combobox.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #if wxUSE_COMBOBOX
  19
  20 #include "wx/combobox.h"
  21 #include "wx/button.h"
  22 #include "wx/menu.h"
  23 #include "wx/mac/uma.h"
  24
  25 #if !USE_SHARED_LIBRARY
  26 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)
  27 #endif
  28
  29 // composite combobox implementation by Dan "Bud" Keith bud@otsys.com
  30
  31
  32 static int nextPopUpMenuId = 1000 ;
  33 MenuHandle NewUniqueMenu()
  34 {
  35   MenuHandle handle = NewMenu( nextPopUpMenuId , "\pMenu" ) ;
  36   nextPopUpMenuId++ ;
  37   return handle ;
  38 }
  39
  40
  41 // ----------------------------------------------------------------------------
  42 // constants
  43 // ----------------------------------------------------------------------------
  44
  45 // the margin between the text control and the choice
  46 #if TARGET_API_MAC_OSX
  47 // margin should be bigger on OS X due to blue highlight
  48 // around text control.
  49 static const wxCoord MARGIN = 4;
  50 // this is the border a focus rect on OSX is needing
  51 static const int    TEXTFOCUSBORDER = 3 ;
  52 #else
  53 static const wxCoord MARGIN = 2;
  54 static const int    TEXTFOCUSBORDER = 0 ;
  55 #endif
  56 static const int    POPUPHEIGHT = 23;
  57
  58
  59 // ----------------------------------------------------------------------------
  60 // wxComboBoxText: text control forwards events to combobox
  61 // ----------------------------------------------------------------------------
  62
  63 class wxComboBoxText : public wxTextCtrl
  64 {
  65 public:
  66     wxComboBoxText( wxComboBox * cb )
  67         : wxTextCtrl( cb , 1 )
  68     {
  69         m_cb = cb;
  70     }
  71
  72 protected:
  73     void OnChar( wxKeyEvent& event )
  74     {
  75         // Allows processing the tab key to go to the next control
  76         if (event.GetKeyCode() == WXK_TAB)
  77         {
  78             wxNavigationKeyEvent NavEvent;
  79             NavEvent.SetEventObject(this);
  80             NavEvent.SetDirection(true);
  81             NavEvent.SetWindowChange(false);
  82
  83             // Get the parent of the combo and have it process the navigation?
  84             if (m_cb->GetParent()->GetEventHandler()->ProcessEvent(NavEvent))
  85                     return;
  86         }
  87         if ( event.GetKeyCode() == WXK_RETURN )
  88         {
  89             wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_cb->GetId());
  90             event.SetString( GetValue() );
  91             event.SetInt( m_cb->GetSelection() );
  92             event.SetEventObject( m_cb );
  93
  94             // This will invoke the dialog default action, such
  95             // as the clicking the default button.
  96
  97             if (!m_cb->GetEventHandler()->ProcessEvent( event ))
  98             {
  99                 wxWindow *parent = GetParent();
 100                 while( parent && !parent->IsTopLevel() && parent->GetDefaultItem() == NULL ) {
 101                     parent = parent->GetParent() ;
 102                 }
 103                 if ( parent && parent->GetDefaultItem() )
 104                 {
 105                     wxButton *def = wxDynamicCast(parent->GetDefaultItem(),
 106                                                           wxButton);
 107                     if ( def && def->IsEnabled() )
 108                     {
 109                         wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, def->GetId() );
 110                         event.SetEventObject(def);
 111                         def->Command(event);
 112                    }
 113                 }
 114
 115                 return;
 116             }
 117         }
 118
 119         event.Skip();
 120     }
 121
 122     // Use the KeyUp as a naive approximation for TEXT_UPDATED, even though it is somewhat delayed
 123     // but this is less complicated than dealing with idle-ness, and is much better than nothing
 124     void OnKeyUp( wxKeyEvent& event )
 125     {
 126         if ( event.GetKeyCode() != WXK_RETURN && event.GetKeyCode() != WXK_TAB )
 127         {
 128             wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_cb->GetId());
 129             event.SetString( GetValue() );
 130             event.SetEventObject( m_cb );
 131             m_cb->GetEventHandler()->ProcessEvent(event);
 132         }
 133     }
 134 private:
 135     wxComboBox *m_cb;
 136
 137     DECLARE_EVENT_TABLE()
 138 };
 139
 140 BEGIN_EVENT_TABLE(wxComboBoxText, wxTextCtrl)
 141     EVT_CHAR( wxComboBoxText::OnChar)
 142     EVT_KEY_UP( wxComboBoxText::OnKeyUp)
 143 END_EVENT_TABLE()
 144
 145 class wxComboBoxChoice : public wxChoice
 146 {
 147 public:
 148     wxComboBoxChoice(wxComboBox *cb, int style)
 149         : wxChoice( cb , 1 )
 150     {
 151         m_cb = cb;
 152     }
 153     int GetPopupWidth() const
 154     {
 155         switch ( GetWindowVariant() )
 156         {
 157             case wxWINDOW_VARIANT_NORMAL :
 158             case wxWINDOW_VARIANT_LARGE :
 159                 return 24 ;
 160             default :
 161                 return 21 ;
 162         }
 163     }
 164
 165 protected:
 166     void OnChoice( wxCommandEvent& e )
 167     {
 168         wxString    s = e.GetString();
 169
 170         m_cb->DelegateChoice( s );
 171         wxCommandEvent event2(wxEVT_COMMAND_COMBOBOX_SELECTED, m_cb->GetId() );
 172         event2.SetInt(m_cb->GetSelection());
 173         event2.SetEventObject(m_cb);
 174         event2.SetString(m_cb->GetStringSelection());
 175         m_cb->ProcessCommand(event2);
 176
 177         // For consistency with MSW and GTK, also send a text updated event
 178         // After all, the text is updated when a selection is made
 179         wxCommandEvent TextEvent( wxEVT_COMMAND_TEXT_UPDATED, m_cb->GetId() );
 180         TextEvent.SetString( m_cb->GetStringSelection() );
 181         TextEvent.SetEventObject( m_cb );
 182         m_cb->ProcessCommand( TextEvent );
 183     }
 184     virtual wxSize DoGetBestSize() const
 185     {
 186         wxSize sz = wxChoice::DoGetBestSize() ;
 187         if (! m_cb->HasFlag(wxCB_READONLY) )
 188             sz.x = GetPopupWidth() ;
 189         return sz ;
 190     }
 191
 192 private:
 193     wxComboBox *m_cb;
 194
 195     DECLARE_EVENT_TABLE()
 196 };
 197
 198 BEGIN_EVENT_TABLE(wxComboBoxChoice, wxChoice)
 199     EVT_CHOICE(-1, wxComboBoxChoice::OnChoice)
 200 END_EVENT_TABLE()
 201
 202 wxComboBox::~wxComboBox()
 203 {
 204     // delete client objects
 205     FreeData();
 206
 207     // delete the controls now, don't leave them alive even though they would
 208     // still be eventually deleted by our parent - but it will be too late, the
 209     // user code expects them to be gone now
 210     if (m_text != NULL) {
 211         delete m_text;
 212         m_text = NULL;
 213     }
 214     if (m_choice != NULL) {
 215         delete m_choice;
 216         m_choice = NULL;
 217     }
 218 }
 219
 220
 221 // ----------------------------------------------------------------------------
 222 // geometry
 223 // ----------------------------------------------------------------------------
 224
 225 wxSize wxComboBox::DoGetBestSize() const
 226 {
 227     if (!m_choice && !m_text)
 228         return GetSize();
 229     wxSize size = m_choice->GetBestSize();
 230
 231     if ( m_text != NULL )
 232     {
 233         wxSize  sizeText = m_text->GetBestSize();
 234         if (sizeText.y > size.y)
 235             size.y = sizeText.y;
 236         size.x = m_choice->GetPopupWidth() + sizeText.x + MARGIN;
 237         size.x += TEXTFOCUSBORDER ;
 238         size.y += 2 * TEXTFOCUSBORDER ;
 239     }
 240     else
 241     {
 242         // clipping is too tight
 243         size.y += 1 ;
 244     }
 245     return size;
 246 }
 247
 248 void wxComboBox::DoMoveWindow(int x, int y, int width, int height)
 249 {
 250     wxControl::DoMoveWindow(x, y, width , height );
 251
 252     if ( m_text == NULL )
 253     {
 254         // we might not be fully constructed yet, therefore watch out...
 255         if ( m_choice )
 256             m_choice->SetSize(0, 0 , width, -1);
 257     }
 258     else
 259     {
 260         wxCoord wText = width - m_choice->GetPopupWidth() - MARGIN;
 261         m_text->SetSize(TEXTFOCUSBORDER, TEXTFOCUSBORDER, wText, -1 );
 262         // put it at an inset of 1 to have outer area shadows drawn as well
 263         m_choice->SetSize(TEXTFOCUSBORDER + wText + MARGIN - 1 , TEXTFOCUSBORDER, m_choice->GetPopupWidth() , -1);
 264     }
 265 }
 266
 267
 268
 269 // ----------------------------------------------------------------------------
 270 // operations forwarded to the subcontrols
 271 // ----------------------------------------------------------------------------
 272
 273 bool wxComboBox::Enable(bool enable)
 274 {
 275     if ( !wxControl::Enable(enable) )
 276         return false;
 277
 278     return true;
 279 }
 280
 281 bool wxComboBox::Show(bool show)
 282 {
 283     if ( !wxControl::Show(show) )
 284         return false;
 285
 286     return true;
 287 }
 288
 289 void wxComboBox::SetFocus()
 290 {
 291     if ( m_text != NULL) {
 292         m_text->SetFocus();
 293     }
 294 }
 295
 296
 297 void wxComboBox::DelegateTextChanged( const wxString& value )
 298 {
 299     SetStringSelection( value );
 300 }
 301
 302
 303 void wxComboBox::DelegateChoice( const wxString& value )
 304 {
 305     SetStringSelection( value );
 306 }
 307
 308
 309 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
 310            const wxString& value,
 311            const wxPoint& pos,
 312            const wxSize& size,
 313            const wxArrayString& choices,
 314            long style,
 315            const wxValidator& validator,
 316            const wxString& name)
 317 {
 318     wxCArrayString chs( choices );
 319
 320     return Create( parent, id, value, pos, size, chs.GetCount(),
 321                    chs.GetStrings(), style, validator, name );
 322 }
 323
 324
 325 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
 326            const wxString& value,
 327            const wxPoint& pos,
 328            const wxSize& size,
 329            int n, const wxString choices[],
 330            long style,
 331            const wxValidator& validator,
 332            const wxString& name)
 333 {
 334     if ( !wxControl::Create(parent, id, wxDefaultPosition, wxDefaultSize, style ,
 335                             wxDefaultValidator, name) )
 336     {
 337         return false;
 338     }
 339
 340     m_choice = new wxComboBoxChoice(this, style );
 341     wxSize csize = size;
 342     if ( style & wxCB_READONLY )
 343     {
 344         m_text = NULL;
 345     }
 346     else
 347     {
 348         m_text = new wxComboBoxText(this);
 349         if ( size.y == -1 )
 350         {
 351             csize.y = m_text->GetSize().y ;
 352             csize.y += 2 * TEXTFOCUSBORDER ;
 353         }
 354     }
 355
 356     DoSetSize(pos.x, pos.y, csize.x, csize.y);
 357
 358     for ( int i = 0 ; i < n ; i++ )
 359     {
 360         m_choice->DoAppend( choices[ i ] );
 361     }
 362
 363     SetBestSize(size);   // Needed because it is a wxControlWithItems
 364     SetStringSelection(value);
 365
 366     return true;
 367 }
 368
 369 wxString wxComboBox::GetValue() const
 370 {
 371     wxString        result;
 372
 373     if ( m_text == NULL )
 374     {
 375         result = m_choice->GetString( m_choice->GetSelection() );
 376     }
 377     else
 378     {
 379         result = m_text->GetValue();
 380     }
 381
 382     return result;
 383 }
 384
 385 int wxComboBox::GetCount() const
 386 {
 387     return m_choice->GetCount() ;
 388 }
 389
 390 void wxComboBox::SetValue(const wxString& value)
 391 {
 392     if ( HasFlag(wxCB_READONLY) )
 393         SetStringSelection( value ) ;
 394     else
 395         m_text->SetValue( value );
 396 }
 397
 398 // Clipboard operations
 399 void wxComboBox::Copy()
 400 {
 401     if ( m_text != NULL )
 402     {
 403         m_text->Copy();
 404     }
 405 }
 406
 407 void wxComboBox::Cut()
 408 {
 409     if ( m_text != NULL )
 410     {
 411         m_text->Cut();
 412     }
 413 }
 414
 415 void wxComboBox::Paste()
 416 {
 417     if ( m_text != NULL )
 418     {
 419         m_text->Paste();
 420     }
 421 }
 422
 423 void wxComboBox::SetEditable(bool editable)
 424 {
 425     if ( ( m_text == NULL ) && editable )
 426     {
 427         m_text = new wxComboBoxText( this );
 428     }
 429     else if ( ( m_text != NULL ) && !editable )
 430     {
 431         delete m_text;
 432         m_text = NULL;
 433     }
 434
 435     int currentX, currentY;
 436     GetPosition( &currentX, &currentY );
 437
 438     int currentW, currentH;
 439     GetSize( &currentW, &currentH );
 440
 441     DoMoveWindow( currentX, currentY, currentW, currentH );
 442 }
 443
 444 void wxComboBox::SetInsertionPoint(long pos)
 445 {
 446     // TODO
 447 }
 448
 449 void wxComboBox::SetInsertionPointEnd()
 450 {
 451     // TODO
 452 }
 453
 454 long wxComboBox::GetInsertionPoint() const
 455 {
 456     // TODO
 457     return 0;
 458 }
 459
 460 wxTextPos wxComboBox::GetLastPosition() const
 461 {
 462     // TODO
 463     return 0;
 464 }
 465
 466 void wxComboBox::Replace(long from, long to, const wxString& value)
 467 {
 468     // TODO
 469 }
 470
 471 void wxComboBox::Remove(long from, long to)
 472 {
 473     // TODO
 474 }
 475
 476 void wxComboBox::SetSelection(long from, long to)
 477 {
 478     // TODO
 479 }
 480
 481 int wxComboBox::DoAppend(const wxString& item)
 482 {
 483     return m_choice->DoAppend( item ) ;
 484 }
 485
 486 int wxComboBox::DoInsert(const wxString& item, int pos)
 487 {
 488     return m_choice->DoInsert( item , pos ) ;
 489 }
 490
 491 void wxComboBox::DoSetItemClientData(int n, void* clientData)
 492 {
 493     return m_choice->DoSetItemClientData( n , clientData ) ;
 494 }
 495
 496 void* wxComboBox::DoGetItemClientData(int n) const
 497 {
 498     return m_choice->DoGetItemClientData( n ) ;
 499 }
 500
 501 void wxComboBox::DoSetItemClientObject(int n, wxClientData* clientData)
 502 {
 503     return m_choice->DoSetItemClientObject( n , clientData ) ;
 504 }
 505
 506 wxClientData* wxComboBox::DoGetItemClientObject(int n) const
 507 {
 508     return m_choice->DoGetItemClientObject( n ) ;
 509 }
 510
 511 void wxComboBox::FreeData()
 512 {
 513     if ( HasClientObjectData() )
 514     {
 515         size_t count = GetCount();
 516         for ( size_t n = 0; n < count; n++ )
 517         {
 518             SetClientObject( n, NULL );
 519         }
 520     }
 521 }
 522
 523 void wxComboBox::Delete(int n)
 524 {
 525     // force client object deletion
 526     if( HasClientObjectData() )
 527         SetClientObject( n, NULL );
 528     m_choice->Delete( n );
 529 }
 530
 531 void wxComboBox::Clear()
 532 {
 533     FreeData();
 534     m_choice->Clear();
 535 }
 536
 537 int wxComboBox::GetSelection() const
 538 {
 539     return m_choice->GetSelection();
 540 }
 541
 542 void wxComboBox::SetSelection(int n)
 543 {
 544     m_choice->SetSelection( n );
 545
 546     if ( m_text != NULL )
 547     {
 548         m_text->SetValue( GetString( n ) );
 549     }
 550 }
 551
 552 int wxComboBox::FindString(const wxString& s) const
 553 {
 554     return m_choice->FindString( s );
 555 }
 556
 557 wxString wxComboBox::GetString(int n) const
 558 {
 559     return m_choice->GetString( n );
 560 }
 561
 562 wxString wxComboBox::GetStringSelection() const
 563 {
 564     int sel = GetSelection ();
 565     if (sel > -1)
 566         return wxString(this->GetString (sel));
 567     else
 568         return wxEmptyString;
 569 }
 570
 571 void wxComboBox::SetString(int n, const wxString& s)
 572 {
 573     m_choice->SetString( n , s ) ;
 574 }
 575
 576 bool wxComboBox::IsEditable() const
 577 {
 578     return m_text != NULL && !HasFlag(wxCB_READONLY);
 579 }
 580
 581 void wxComboBox::Undo()
 582 {
 583     if (m_text != NULL)
 584         m_text->Undo();
 585 }
 586
 587 void wxComboBox::Redo()
 588 {
 589     if (m_text != NULL)
 590         m_text->Redo();
 591 }
 592
 593 void wxComboBox::SelectAll()
 594 {
 595     if (m_text != NULL)
 596         m_text->SelectAll();
 597 }
 598
 599 bool wxComboBox::CanCopy() const
 600 {
 601     if (m_text != NULL)
 602         return m_text->CanCopy();
 603     else
 604         return false;
 605 }
 606
 607 bool wxComboBox::CanCut() const
 608 {
 609     if (m_text != NULL)
 610         return m_text->CanCut();
 611     else
 612         return false;
 613 }
 614
 615 bool wxComboBox::CanPaste() const
 616 {
 617     if (m_text != NULL)
 618         return m_text->CanPaste();
 619     else
 620         return false;
 621 }
 622
 623 bool wxComboBox::CanUndo() const
 624 {
 625     if (m_text != NULL)
 626         return m_text->CanUndo();
 627     else
 628         return false;
 629 }
 630
 631 bool wxComboBox::CanRedo() const
 632 {
 633     if (m_text != NULL)
 634         return m_text->CanRedo();
 635     else
 636         return false;
 637 }
 638
 639 wxInt32 wxComboBox::MacControlHit(WXEVENTHANDLERREF WXUNUSED(handler) , WXEVENTREF WXUNUSED(event) )
 640 {
 641     /* For consistency with other platforms, clicking in the text area does not constitute a selection
 642     wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, m_windowId );
 643     event.SetInt(GetSelection());
 644     event.SetEventObject(this);
 645     event.SetString(GetStringSelection());
 646     ProcessCommand(event);*/
 647     return noErr ;
 648 }
 649
 650 #endif