src/mac/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 #ifdef __GNUG__
  13 #pragma implementation "combobox.h"
  14 #endif
  15
  16 #include "wx/combobox.h"
  17 #include "wx/button.h"
  18 #include "wx/menu.h"
  19 #include "wx/mac/uma.h"
  20
  21 #if !USE_SHARED_LIBRARY
  22 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)
  23 #endif
  24
  25 // composite combobox implementation by Dan "Bud" Keith bud@otsys.com
  26
  27
  28 static int nextPopUpMenuId = 1000 ;
  29 MenuHandle NewUniqueMenu()
  30 {
  31   MenuHandle handle = NewMenu( nextPopUpMenuId , "\pMenu" ) ;
  32   nextPopUpMenuId++ ;
  33   return handle ;
  34 }
  35
  36
  37 // ----------------------------------------------------------------------------
  38 // constants
  39 // ----------------------------------------------------------------------------
  40
  41 // the margin between the text control and the choice
  42 static const wxCoord MARGIN = 2;
  43 static const int    POPUPWIDTH = 18;
  44 static const int    POPUPHEIGHT = 23;
  45
  46
  47 // ----------------------------------------------------------------------------
  48 // wxComboBoxText: text control forwards events to combobox
  49 // ----------------------------------------------------------------------------
  50
  51 class wxComboBoxText : public wxTextCtrl
  52 {
  53 public:
  54     wxComboBoxText( wxComboBox * cb )
  55         : wxTextCtrl( cb , 1 )
  56     {
  57         m_cb = cb;
  58     }
  59
  60 protected:
  61     void OnChar( wxKeyEvent& event )
  62     {
  63         if ( event.GetKeyCode() == WXK_RETURN )
  64         {
  65             wxString value = GetValue();
  66
  67             if ( m_cb->GetCount() == 0 )
  68             {
  69                 // make Enter generate "selected" event if there is only one item
  70                 // in the combobox - without it, it's impossible to select it at
  71                 // all!
  72                 wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, m_cb->GetId() );
  73                 event.SetInt( 0 );
  74                 event.SetString( value );
  75                 event.SetEventObject( m_cb );
  76                 m_cb->GetEventHandler()->ProcessEvent( event );
  77             }
  78             else
  79             {
  80                 // add the item to the list if it's not there yet
  81                 if ( m_cb->FindString(value) == wxNOT_FOUND )
  82                 {
  83                     m_cb->Append(value);
  84                     m_cb->SetStringSelection(value);
  85
  86                     // and generate the selected event for it
  87                     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, m_cb->GetId() );
  88                     event.SetInt( m_cb->GetCount() - 1 );
  89                     event.SetString( value );
  90                     event.SetEventObject( m_cb );
  91                     m_cb->GetEventHandler()->ProcessEvent( event );
  92                 }
  93
  94                 // This will invoke the dialog default action, such
  95                 // as the clicking the default button.
  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                         return ;
 111                    }
 112                 }
 113
 114                 return;
 115             }
 116         }
 117
 118         event.Skip();
 119     }
 120
 121 private:
 122     wxComboBox *m_cb;
 123
 124     DECLARE_EVENT_TABLE()
 125 };
 126
 127 BEGIN_EVENT_TABLE(wxComboBoxText, wxTextCtrl)
 128     EVT_CHAR( wxComboBoxText::OnChar)
 129 END_EVENT_TABLE()
 130
 131 class wxComboBoxChoice : public wxChoice
 132 {
 133 public:
 134     wxComboBoxChoice(wxComboBox *cb, int style)
 135         : wxChoice( cb , 1 )
 136     {
 137         m_cb = cb;
 138     }
 139
 140 protected:
 141     void OnChoice( wxCommandEvent& e )
 142     {
 143         wxString    s = e.GetString();
 144
 145         m_cb->DelegateChoice( s );
 146         wxCommandEvent event2(wxEVT_COMMAND_COMBOBOX_SELECTED, m_cb->GetId() );
 147         event2.SetInt(m_cb->GetSelection());
 148         event2.SetEventObject(m_cb);
 149         event2.SetString(m_cb->GetStringSelection());
 150         m_cb->ProcessCommand(event2);
 151     }
 152
 153 private:
 154     wxComboBox *m_cb;
 155
 156     DECLARE_EVENT_TABLE()
 157 };
 158
 159 BEGIN_EVENT_TABLE(wxComboBoxChoice, wxChoice)
 160     EVT_CHOICE(-1, wxComboBoxChoice::OnChoice)
 161 END_EVENT_TABLE()
 162
 163 wxComboBox::~wxComboBox()
 164 {
 165    // delete the controls now, don't leave them alive even though they would
 166     // still be eventually deleted by our parent - but it will be too late, the
 167     // user code expects them to be gone now
 168     if (m_text != NULL) {
 169         delete m_text;
 170         m_text = NULL;
 171     }
 172     if (m_choice != NULL) {
 173         delete m_choice;
 174         m_choice = NULL;
 175     }
 176 }
 177
 178
 179 // ----------------------------------------------------------------------------
 180 // geometry
 181 // ----------------------------------------------------------------------------
 182
 183 wxSize wxComboBox::DoGetBestSize() const
 184 {
 185     wxSize size = m_choice->GetBestSize();
 186
 187     if ( m_text != NULL )
 188     {
 189         wxSize  sizeText = m_text->GetBestSize();
 190
 191         size.x = POPUPWIDTH + sizeText.x + MARGIN;
 192     }
 193
 194     return size;
 195 }
 196
 197 void wxComboBox::DoMoveWindow(int x, int y, int width, int height) {
 198     height = POPUPHEIGHT;
 199
 200     wxControl::DoMoveWindow(x, y, width, height);
 201
 202     if ( m_text == NULL )
 203     {
 204         m_choice->SetSize(0, 0 , width, -1);
 205     }
 206     else
 207     {
 208         wxCoord wText = width - POPUPWIDTH - MARGIN;
 209         m_text->SetSize(0, 0, wText, height);
 210         m_choice->SetSize(0 + wText + MARGIN, 0, POPUPWIDTH, -1);
 211     }
 212 }
 213
 214
 215
 216 // ----------------------------------------------------------------------------
 217 // operations forwarded to the subcontrols
 218 // ----------------------------------------------------------------------------
 219
 220 bool wxComboBox::Enable(bool enable)
 221 {
 222     if ( !wxControl::Enable(enable) )
 223         return FALSE;
 224
 225     return TRUE;
 226 }
 227
 228 bool wxComboBox::Show(bool show)
 229 {
 230     if ( !wxControl::Show(show) )
 231         return FALSE;
 232
 233     return TRUE;
 234 }
 235
 236 void wxComboBox::SetFocus()
 237 {
 238     if ( m_text != NULL) {
 239         m_text->SetFocus();
 240     }
 241 }
 242
 243
 244 void wxComboBox::DelegateTextChanged( const wxString& value )
 245 {
 246     SetStringSelection( value );
 247 }
 248
 249
 250 void wxComboBox::DelegateChoice( const wxString& value )
 251 {
 252     SetStringSelection( value );
 253 }
 254
 255
 256 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
 257            const wxString& value,
 258            const wxPoint& pos,
 259            const wxSize& size,
 260            int n, const wxString choices[],
 261            long style,
 262            const wxValidator& validator,
 263            const wxString& name)
 264 {
 265     if ( !wxControl::Create(parent, id, wxDefaultPosition, wxDefaultSize, style ,
 266                             wxDefaultValidator, name) )
 267     {
 268         return FALSE;
 269     }
 270
 271     m_choice = new wxComboBoxChoice(this, style );
 272
 273     wxSize csize = size;
 274     if ( style & wxCB_READONLY )
 275     {
 276         m_text = NULL;
 277     }
 278     else
 279     {
 280         m_text = new wxComboBoxText(this);
 281         if ( size.y == -1 ) {
 282           csize.y = m_text->GetSize().y ;
 283         }
 284     }
 285
 286     DoSetSize(pos.x, pos.y, csize.x, csize.y);
 287
 288     for ( int i = 0 ; i < n ; i++ )
 289     {
 290         m_choice->DoAppend( choices[ i ] );
 291     }
 292
 293     return TRUE;
 294 }
 295
 296 wxString wxComboBox::GetValue() const
 297 {
 298     wxString        result;
 299
 300     if ( m_text == NULL )
 301     {
 302         result = m_choice->GetString( m_choice->GetSelection() );
 303     }
 304     else
 305     {
 306         result = m_text->GetValue();
 307     }
 308
 309     return result;
 310 }
 311
 312 void wxComboBox::SetValue(const wxString& value)
 313 {
 314     int s = FindString (value);
 315     if (s == wxNOT_FOUND && !HasFlag(wxCB_READONLY) )
 316     {
 317         m_choice->Append(value) ;
 318     }
 319     SetStringSelection( value ) ;
 320 }
 321
 322 // Clipboard operations
 323 void wxComboBox::Copy()
 324 {
 325     if ( m_text != NULL )
 326     {
 327         m_text->Copy();
 328     }
 329 }
 330
 331 void wxComboBox::Cut()
 332 {
 333     if ( m_text != NULL )
 334     {
 335         m_text->Cut();
 336     }
 337 }
 338
 339 void wxComboBox::Paste()
 340 {
 341     if ( m_text != NULL )
 342     {
 343         m_text->Paste();
 344     }
 345 }
 346
 347 void wxComboBox::SetEditable(bool editable)
 348 {
 349     if ( ( m_text == NULL ) && editable )
 350     {
 351         m_text = new wxComboBoxText( this );
 352     }
 353     else if ( ( m_text != NULL ) && !editable )
 354     {
 355         delete m_text;
 356         m_text = NULL;
 357     }
 358
 359     int currentX, currentY;
 360     GetPosition( &currentX, &currentY );
 361
 362     int currentW, currentH;
 363     GetSize( &currentW, &currentH );
 364
 365     DoMoveWindow( currentX, currentY, currentW, currentH );
 366 }
 367
 368 void wxComboBox::SetInsertionPoint(long pos)
 369 {
 370     // TODO
 371 }
 372
 373 void wxComboBox::SetInsertionPointEnd()
 374 {
 375     // TODO
 376 }
 377
 378 long wxComboBox::GetInsertionPoint() const
 379 {
 380     // TODO
 381     return 0;
 382 }
 383
 384 long wxComboBox::GetLastPosition() const
 385 {
 386     // TODO
 387     return 0;
 388 }
 389
 390 void wxComboBox::Replace(long from, long to, const wxString& value)
 391 {
 392     // TODO
 393 }
 394
 395 void wxComboBox::Remove(long from, long to)
 396 {
 397     // TODO
 398 }
 399
 400 void wxComboBox::SetSelection(long from, long to)
 401 {
 402     // TODO
 403 }
 404
 405 void wxComboBox::Append(const wxString& item)
 406 {
 407     // I am not sure what other ports do,
 408     // but wxMac chokes on empty entries.
 409
 410     if (!item.IsEmpty())
 411         m_choice->DoAppend( item );
 412 }
 413
 414 void wxComboBox::Delete(int n)
 415 {
 416     if ( HasClientObjectData() )
 417     {
 418         SetClientObject(n, NULL);
 419     }
 420     m_choice->Delete( n );
 421 }
 422
 423 void wxComboBox::Clear()
 424 {
 425     m_choice->Clear();
 426 }
 427
 428 int wxComboBox::GetSelection() const
 429 {
 430     return m_choice->GetSelection();
 431 }
 432
 433 void wxComboBox::SetSelection(int n)
 434 {
 435     m_choice->SetSelection( n );
 436
 437     if ( m_text != NULL )
 438     {
 439         m_text->SetValue( GetString( n ) );
 440     }
 441 }
 442
 443 int wxComboBox::FindString(const wxString& s) const
 444 {
 445     return m_choice->FindString( s );
 446 }
 447
 448 wxString wxComboBox::GetString(int n) const
 449 {
 450     return m_choice->GetString( n );
 451 }
 452
 453 wxString wxComboBox::GetStringSelection() const
 454 {
 455     int sel = GetSelection ();
 456     if (sel > -1)
 457         return wxString(this->GetString (sel));
 458     else
 459         return wxEmptyString;
 460 }
 461
 462 bool wxComboBox::SetStringSelection(const wxString& sel)
 463 {
 464     int s = FindString (sel);
 465     if (s > -1)
 466         {
 467             SetSelection (s);
 468             return TRUE;
 469         }
 470     else
 471         return FALSE;
 472 }
 473
 474 void wxComboBox::MacHandleControlClick( WXWidget WXUNUSED(control) , wxInt16 WXUNUSED(controlpart) )
 475 {
 476     wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, m_windowId );
 477     event.SetInt(GetSelection());
 478     event.SetEventObject(this);
 479     event.SetString(GetStringSelection());
 480     ProcessCommand(event);
 481 }
 482