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