src/univ/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/univ/combobox.cpp
   3 // Purpose:     wxComboBox implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     15.12.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_COMBOBOX
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/log.h"
  30
  31     #include "wx/button.h"
  32     #include "wx/combobox.h"
  33     #include "wx/listbox.h"
  34     #include "wx/textctrl.h"
  35     #include "wx/bmpbuttn.h"
  36
  37     #include "wx/validate.h"
  38 #endif
  39
  40 #include "wx/tooltip.h"
  41 #include "wx/combo.h"
  42
  43 #include "wx/univ/renderer.h"
  44 #include "wx/univ/inphand.h"
  45 #include "wx/univ/theme.h"
  46
  47 // ----------------------------------------------------------------------------
  48 // wxStdComboBoxInputHandler: allows the user to open/close the combo from kbd
  49 // ----------------------------------------------------------------------------
  50
  51 class WXDLLEXPORT wxStdComboBoxInputHandler : public wxStdInputHandler
  52 {
  53 public:
  54     wxStdComboBoxInputHandler(wxInputHandler *inphand);
  55
  56     virtual bool HandleKey(wxInputConsumer *consumer,
  57                            const wxKeyEvent& event,
  58                            bool pressed);
  59 };
  60
  61 // ----------------------------------------------------------------------------
  62 // wxComboListBox is a listbox modified to be used as a popup window in a
  63 // combobox
  64 // ----------------------------------------------------------------------------
  65
  66 class wxComboListBox : public wxListBox, public wxComboPopup
  67 {
  68 public:
  69     // ctor and dtor
  70     wxComboListBox();
  71     virtual ~wxComboListBox();
  72
  73     // implement wxComboPopup methods
  74     virtual bool Create(wxWindow* parent);
  75     virtual void SetStringValue(const wxString& s);
  76     virtual wxString GetStringValue() const;
  77     virtual wxWindow *GetControl() { return this; }
  78     virtual void OnPopup();
  79     virtual wxSize GetAdjustedSize(int minWidth, int prefHeight, int maxHeight);
  80
  81     // fix virtual function hiding
  82     virtual void SetSelection(int n) { DoSetSelection(n, true); }
  83     void SetSelection(int n, bool select) { DoSetSelection(n, select); }
  84
  85     // used to process wxUniv actions
  86     bool PerformAction(const wxControlAction& action,
  87                        long numArg,
  88                        const wxString& strArg);
  89
  90 protected:
  91     // set m_clicked value from here
  92     void OnLeftUp(wxMouseEvent& event);
  93
  94 private:
  95     DECLARE_EVENT_TABLE()
  96 };
  97
  98 // ----------------------------------------------------------------------------
  99 // event tables and such
 100 // ----------------------------------------------------------------------------
 101
 102 BEGIN_EVENT_TABLE(wxComboListBox, wxListBox)
 103     EVT_LEFT_UP(wxComboListBox::OnLeftUp)
 104 END_EVENT_TABLE()
 105
 106 IMPLEMENT_DYNAMIC_CLASS2(wxComboBox, wxControl, wxComboCtrl)
 107
 108 // ============================================================================
 109 // implementation
 110 // ============================================================================
 111
 112 // ----------------------------------------------------------------------------
 113 // wxComboListBox
 114 // ----------------------------------------------------------------------------
 115
 116 wxComboListBox::wxComboListBox() : wxListBox(), wxComboPopup()
 117 {
 118 }
 119
 120 bool wxComboListBox::Create(wxWindow* parent)
 121 {
 122     if ( !wxListBox::Create(parent, wxID_ANY,
 123                             wxDefaultPosition, wxDefaultSize,
 124                             0, NULL,
 125                             wxBORDER_SIMPLE | wxLB_INT_HEIGHT |
 126                             m_combo->GetWindowStyle() & wxCB_SORT ? wxLB_SORT : 0) )
 127         return false;
 128
 129     // we don't react to the mouse events outside the window at all
 130     StopAutoScrolling();
 131
 132     return true;
 133 }
 134
 135 wxComboListBox::~wxComboListBox()
 136 {
 137 }
 138
 139 wxString wxComboListBox::GetStringValue() const
 140 {
 141     return wxListBox::GetStringSelection();
 142 }
 143
 144 void wxComboListBox::SetStringValue(const wxString& value)
 145 {
 146     if ( !value.empty() )
 147     {
 148                 if (FindString(value) != wxNOT_FOUND)
 149                 wxListBox::SetStringSelection(value);
 150         }
 151     else
 152         wxListBox::SetSelection(-1);
 153 }
 154
 155 void wxComboListBox::OnPopup()
 156 {
 157 }
 158
 159 bool wxComboListBox::PerformAction(const wxControlAction& action,
 160                                    long numArg,
 161                                    const wxString& strArg)
 162
 163 {
 164     if ( action == wxACTION_LISTBOX_FIND )
 165     {
 166         // we don't let the listbox handle this as instead of just using the
 167         // single key presses, as usual, we use the text ctrl value as prefix
 168         // and this is done by wxComboCtrl itself
 169         return true;
 170     }
 171
 172     return wxListBox::PerformAction(action, numArg, strArg);
 173 }
 174
 175 void wxComboListBox::OnLeftUp(wxMouseEvent& event)
 176 {
 177     // we should dismiss the combo now
 178     // first update the combo and close the listbox
 179     Dismiss();
 180     m_combo->SetValue(wxListBox::GetStringSelection());
 181
 182     // next let the user code have the event
 183     wxCommandEvent evt(wxEVT_COMMAND_COMBOBOX_SELECTED,m_combo->GetId());
 184     evt.SetInt(wxListBox::GetSelection());
 185     evt.SetEventObject(m_combo);
 186     m_combo->ProcessEvent(evt);
 187
 188     event.Skip();
 189 }
 190
 191 wxSize wxComboListBox::GetAdjustedSize(int minWidth,
 192                                        int WXUNUSED(prefHeight),
 193                                        int maxHeight)
 194 {
 195     wxSize bestSize = wxListBox::GetBestSize();
 196     return wxSize(wxMax(bestSize.x,minWidth),
 197                   wxMin(bestSize.y,maxHeight));
 198 }
 199
 200 // ----------------------------------------------------------------------------
 201 // wxComboBox
 202 // ----------------------------------------------------------------------------
 203
 204 void wxComboBox::Init()
 205 {
 206     m_lbox = (wxListBox *)NULL;
 207 }
 208
 209 wxComboBox::wxComboBox(wxWindow *parent,
 210                        wxWindowID id,
 211                        const wxString& value,
 212                        const wxPoint& pos,
 213                        const wxSize& size,
 214                        const wxArrayString& choices,
 215                        long style,
 216                        const wxValidator& validator,
 217                        const wxString& name)
 218 {
 219     Init();
 220
 221     Create(parent, id, value, pos, size, choices, style, validator, name);
 222 }
 223
 224 bool wxComboBox::Create(wxWindow *parent,
 225                         wxWindowID id,
 226                         const wxString& value,
 227                         const wxPoint& pos,
 228                         const wxSize& size,
 229                         const wxArrayString& choices,
 230                         long style,
 231                         const wxValidator& validator,
 232                         const wxString& name)
 233 {
 234     wxCArrayString chs(choices);
 235
 236     return Create(parent, id, value, pos, size, chs.GetCount(),
 237                   chs.GetStrings(), style, validator, name);
 238 }
 239
 240 bool wxComboBox::Create(wxWindow *parent,
 241                         wxWindowID id,
 242                         const wxString& value,
 243                         const wxPoint& pos,
 244                         const wxSize& size,
 245                         int n,
 246                         const wxString choices[],
 247                         long style,
 248                         const wxValidator& validator,
 249                         const wxString& name)
 250 {
 251     if ( !wxComboCtrl::Create(parent, id, value, pos, size, style,
 252                                  validator, name) )
 253     {
 254         return false;
 255     }
 256
 257     wxComboListBox *combolbox = new wxComboListBox();
 258     SetPopupControl(combolbox);
 259
 260     m_lbox = combolbox;
 261     m_lbox->Set(n, choices);
 262
 263     return true;
 264 }
 265
 266 wxComboBox::~wxComboBox()
 267 {
 268 }
 269
 270 // ----------------------------------------------------------------------------
 271 // wxComboBox methods forwarded to wxTextCtrl
 272 // ----------------------------------------------------------------------------
 273
 274 wxString wxComboBox::GetValue() const
 275 {
 276     return wxComboCtrl::GetValue();
 277 }
 278
 279 void wxComboBox::SetValue(const wxString& value)
 280 {
 281     wxComboCtrl::SetValue(value);
 282 }
 283
 284 void wxComboBox::Copy()
 285 {
 286     if ( GetTextCtrl() ) GetTextCtrl()->Copy();
 287 }
 288
 289 void wxComboBox::Cut()
 290 {
 291     if ( GetTextCtrl() ) GetTextCtrl()->Cut();
 292 }
 293
 294 void wxComboBox::Paste()
 295 {
 296     if ( GetTextCtrl() ) GetTextCtrl()->Paste();
 297 }
 298
 299 void wxComboBox::SetInsertionPoint(long pos)
 300 {
 301     if ( GetTextCtrl() ) GetTextCtrl()->SetInsertionPoint(pos);
 302 }
 303
 304 void wxComboBox::SetInsertionPointEnd()
 305 {
 306     if ( GetTextCtrl() ) GetTextCtrl()->SetInsertionPointEnd();
 307 }
 308
 309 long wxComboBox::GetInsertionPoint() const
 310 {
 311     if ( GetTextCtrl() )
 312         return GetTextCtrl()->GetInsertionPoint();
 313     return -1;
 314 }
 315
 316 wxTextPos wxComboBox::GetLastPosition() const
 317 {
 318     if ( GetTextCtrl() )
 319         return GetTextCtrl()->GetLastPosition();
 320     return -1;
 321 }
 322
 323 void wxComboBox::Replace(long from, long to, const wxString& value)
 324 {
 325     if ( GetTextCtrl() ) GetTextCtrl()->Replace(from, to, value);
 326 }
 327
 328 void wxComboBox::Remove(long from, long to)
 329 {
 330     if ( GetTextCtrl() ) GetTextCtrl()->Remove(from, to);
 331 }
 332
 333 void wxComboBox::SetSelection(long from, long to)
 334 {
 335     if ( GetTextCtrl() ) GetTextCtrl()->SetSelection(from, to);
 336 }
 337
 338 void wxComboBox::SetEditable(bool editable)
 339 {
 340     if ( GetTextCtrl() ) GetTextCtrl()->SetEditable(editable);
 341 }
 342
 343 // ----------------------------------------------------------------------------
 344 // wxComboBox methods forwarded to wxListBox
 345 // ----------------------------------------------------------------------------
 346
 347 void wxComboBox::Clear()
 348 {
 349     GetLBox()->Clear();
 350     if ( GetTextCtrl() ) GetTextCtrl()->SetValue(wxEmptyString);
 351 }
 352
 353 void wxComboBox::Delete(unsigned int n)
 354 {
 355     wxCHECK_RET( IsValid(n), _T("invalid index in wxComboBox::Delete") );
 356
 357     if (GetSelection() == (int)n)
 358         if ( GetTextCtrl() ) GetTextCtrl()->SetValue(wxEmptyString);
 359
 360     GetLBox()->Delete(n);
 361 }
 362
 363 unsigned int wxComboBox::GetCount() const
 364 {
 365     return GetLBox()->GetCount();
 366 }
 367
 368 wxString wxComboBox::GetString(unsigned int n) const
 369 {
 370     wxCHECK_MSG( IsValid(n), wxEmptyString, _T("invalid index in wxComboBox::GetString") );
 371
 372     return GetLBox()->GetString(n);
 373 }
 374
 375 void wxComboBox::SetString(unsigned int n, const wxString& s)
 376 {
 377     wxCHECK_RET( IsValid(n), _T("invalid index in wxComboBox::SetString") );
 378
 379     GetLBox()->SetString(n, s);
 380 }
 381
 382 int wxComboBox::FindString(const wxString& s, bool bCase) const
 383 {
 384     return GetLBox()->FindString(s, bCase);
 385 }
 386
 387 void wxComboBox::SetSelection(int n)
 388 {
 389     wxCHECK_RET( IsValid(n), _T("invalid index in wxComboBox::Select") );
 390
 391     GetLBox()->SetSelection(n);
 392     if ( GetTextCtrl() ) GetTextCtrl()->SetValue(GetLBox()->GetString(n));
 393 }
 394
 395 int wxComboBox::GetSelection() const
 396 {
 397 #if 1 // FIXME:: What is the correct behavior?
 398     // if the current value isn't one of the listbox strings, return -1
 399     return GetLBox()->GetSelection();
 400 #else
 401     // Why oh why is this done this way?
 402     // It is not because the value displayed in the text can be found
 403     // in the list that it is the item that is selected!
 404     return FindString(if ( GetTextCtrl() ) GetTextCtrl()->GetValue());
 405 #endif
 406 }
 407
 408 int wxComboBox::DoAppend(const wxString& item)
 409 {
 410     return GetLBox()->Append(item);
 411 }
 412
 413 int wxComboBox::DoInsert(const wxString& item, unsigned int pos)
 414 {
 415     wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
 416     wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
 417
 418     if (pos == GetCount())
 419         return DoAppend(item);
 420
 421     GetLBox()->Insert(item, pos);
 422     return pos;
 423 }
 424
 425 void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
 426 {
 427     GetLBox()->SetClientData(n, clientData);
 428 }
 429
 430 void *wxComboBox::DoGetItemClientData(unsigned int n) const
 431 {
 432     return GetLBox()->GetClientData(n);
 433 }
 434
 435 void wxComboBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
 436 {
 437     GetLBox()->SetClientObject(n, clientData);
 438 }
 439
 440 wxClientData* wxComboBox::DoGetItemClientObject(unsigned int n) const
 441 {
 442     return GetLBox()->GetClientObject(n);
 443 }
 444
 445 bool wxComboBox::IsEditable() const
 446 {
 447     return GetTextCtrl() != NULL && (!HasFlag(wxCB_READONLY) || GetTextCtrl()->IsEditable() );
 448 }
 449
 450 void wxComboBox::Undo()
 451 {
 452     if (IsEditable())
 453         if ( GetTextCtrl() ) GetTextCtrl()->Undo();
 454 }
 455
 456 void wxComboBox::Redo()
 457 {
 458     if (IsEditable())
 459         if ( GetTextCtrl() ) GetTextCtrl()->Redo();
 460 }
 461
 462 void wxComboBox::SelectAll()
 463 {
 464     if ( GetTextCtrl() ) GetTextCtrl()->SelectAll();
 465 }
 466
 467 bool wxComboBox::CanCopy() const
 468 {
 469     if (GetTextCtrl() != NULL)
 470         return GetTextCtrl()->CanCopy();
 471     else
 472         return false;
 473 }
 474
 475 bool wxComboBox::CanCut() const
 476 {
 477     if (GetTextCtrl() != NULL)
 478         return GetTextCtrl()->CanCut();
 479     else
 480         return false;
 481 }
 482
 483 bool wxComboBox::CanPaste() const
 484 {
 485     if (IsEditable())
 486         return GetTextCtrl()->CanPaste();
 487     else
 488         return false;
 489 }
 490
 491 bool wxComboBox::CanUndo() const
 492 {
 493     if (IsEditable())
 494         return GetTextCtrl()->CanUndo();
 495     else
 496         return false;
 497 }
 498
 499 bool wxComboBox::CanRedo() const
 500 {
 501     if (IsEditable())
 502         return GetTextCtrl()->CanRedo();
 503     else
 504         return false;
 505 }
 506
 507
 508 // ----------------------------------------------------------------------------
 509 // wxStdComboBoxInputHandler
 510 // ----------------------------------------------------------------------------
 511
 512 wxStdComboBoxInputHandler::wxStdComboBoxInputHandler(wxInputHandler *inphand)
 513                          : wxStdInputHandler(inphand)
 514 {
 515 }
 516
 517 bool wxStdComboBoxInputHandler::HandleKey(wxInputConsumer *consumer,
 518                                           const wxKeyEvent& event,
 519                                           bool pressed)
 520 {
 521     if ( pressed )
 522     {
 523         wxControlAction action;
 524         switch ( event.GetKeyCode() )
 525         {
 526             case WXK_DOWN:
 527                 action = wxACTION_COMBOBOX_POPUP;
 528                 break;
 529
 530             case WXK_ESCAPE:
 531                 action = wxACTION_COMBOBOX_DISMISS;
 532                 break;
 533         }
 534
 535         if ( !action.IsEmpty() )
 536         {
 537             consumer->PerformAction(action);
 538
 539             return true;
 540         }
 541     }
 542
 543     return wxStdInputHandler::HandleKey(consumer, event, pressed);
 544 }
 545
 546 /* static */
 547 wxInputHandler *wxComboBox::GetStdInputHandler(wxInputHandler *handlerDef)
 548 {
 549     static wxStdComboBoxInputHandler s_handler(handlerDef);
 550
 551     return &s_handler;
 552 }
 553
 554 #endif // wxUSE_COMBOBOX