src/msw/bmpcbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/bmpcbox.cpp
   3 // Purpose:     wxBitmapComboBox
   4 // Author:      Jaakko Salli
   5 // Created:     2008-04-06
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Jaakko Salli
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22     #pragma hdrstop
  23 #endif
  24
  25 #if wxUSE_BITMAPCOMBOBOX
  26
  27 #include "wx/bmpcbox.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/log.h"
  31 #endif
  32
  33 #include "wx/settings.h"
  34
  35 #include "wx/msw/dcclient.h"
  36 #include "wx/msw/private.h"
  37
  38 // For wxODCB_XXX flags
  39 #include "wx/odcombo.h"
  40
  41
  42 #define IMAGE_SPACING_CTRL_VERTICAL 7  // Spacing used in control size calculation
  43
  44
  45 // ============================================================================
  46 // implementation
  47 // ============================================================================
  48
  49
  50 BEGIN_EVENT_TABLE(wxBitmapComboBox, wxComboBox)
  51     EVT_SIZE(wxBitmapComboBox::OnSize)
  52 END_EVENT_TABLE()
  53
  54
  55 IMPLEMENT_DYNAMIC_CLASS(wxBitmapComboBox, wxComboBox)
  56
  57
  58 // ----------------------------------------------------------------------------
  59 // wxBitmapComboBox creation
  60 // ----------------------------------------------------------------------------
  61
  62 void wxBitmapComboBox::Init()
  63 {
  64     m_inResize = false;
  65 }
  66
  67 wxBitmapComboBox::wxBitmapComboBox(wxWindow *parent,
  68                                   wxWindowID id,
  69                                   const wxString& value,
  70                                   const wxPoint& pos,
  71                                   const wxSize& size,
  72                                   const wxArrayString& choices,
  73                                   long style,
  74                                   const wxValidator& validator,
  75                                   const wxString& name)
  76     : wxComboBox(),
  77       wxBitmapComboBoxBase()
  78 {
  79     Init();
  80
  81     Create(parent,id,value,pos,size,choices,style,validator,name);
  82 }
  83
  84 bool wxBitmapComboBox::Create(wxWindow *parent,
  85                               wxWindowID id,
  86                               const wxString& value,
  87                               const wxPoint& pos,
  88                               const wxSize& size,
  89                               const wxArrayString& choices,
  90                               long style,
  91                               const wxValidator& validator,
  92                               const wxString& name)
  93 {
  94     wxCArrayString chs(choices);
  95     return Create(parent, id, value, pos, size, chs.GetCount(),
  96                   chs.GetStrings(), style, validator, name);
  97 }
  98
  99 bool wxBitmapComboBox::Create(wxWindow *parent,
 100                               wxWindowID id,
 101                               const wxString& value,
 102                               const wxPoint& pos,
 103                               const wxSize& size,
 104                               int n,
 105                               const wxString choices[],
 106                               long style,
 107                               const wxValidator& validator,
 108                               const wxString& name)
 109 {
 110     if ( !wxComboBox::Create(parent, id, value, pos, size,
 111                              n, choices, style, validator, name) )
 112         return false;
 113
 114     UpdateInternals();
 115
 116     return true;
 117 }
 118
 119 WXDWORD wxBitmapComboBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 120 {
 121     return wxComboBox::MSWGetStyle(style, exstyle) | CBS_OWNERDRAWFIXED | CBS_HASSTRINGS;
 122 }
 123
 124 void wxBitmapComboBox::RecreateControl()
 125 {
 126     //
 127     // Recreate control so that WM_MEASUREITEM gets called again.
 128     // Can't use CBS_OWNERDRAWVARIABLE because it has odd
 129     // mouse-wheel behaviour.
 130     //
 131     wxString value = GetValue();
 132     wxPoint pos = GetPosition();
 133     wxSize size = GetSize();
 134     size.y = GetBestSize().y;
 135     wxArrayString strings = GetStrings();
 136
 137     wxComboBox::DoClear();
 138
 139     HWND hwnd = GetHwnd();
 140     DissociateHandle();
 141     ::DestroyWindow(hwnd);
 142
 143     if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
 144         return;
 145
 146     // initialize the controls contents
 147     for ( unsigned int i = 0; i < strings.size(); i++ )
 148     {
 149         wxComboBox::Append(strings[i]);
 150     }
 151
 152     // and make sure it has the same attributes as before
 153     if ( m_hasFont )
 154     {
 155         // calling SetFont(m_font) would do nothing as the code would
 156         // notice that the font didn't change, so force it to believe
 157         // that it did
 158         wxFont font = m_font;
 159         m_font = wxNullFont;
 160         SetFont(font);
 161     }
 162
 163     if ( m_hasFgCol )
 164     {
 165         wxColour colFg = m_foregroundColour;
 166         m_foregroundColour = wxNullColour;
 167         SetForegroundColour(colFg);
 168     }
 169
 170     if ( m_hasBgCol )
 171     {
 172         wxColour colBg = m_backgroundColour;
 173         m_backgroundColour = wxNullColour;
 174         SetBackgroundColour(colBg);
 175     }
 176     else
 177     {
 178         SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 179     }
 180
 181     ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT, 0, MeasureItem(0));
 182
 183     // Revert the old string value
 184     if ( !HasFlag(wxCB_READONLY) )
 185         ChangeValue(value);
 186 }
 187
 188 wxBitmapComboBox::~wxBitmapComboBox()
 189 {
 190     Clear();
 191 }
 192
 193 wxSize wxBitmapComboBox::DoGetBestSize() const
 194 {
 195     wxSize best = wxComboBox::DoGetBestSize();
 196     wxSize bitmapSize = GetBitmapSize();
 197
 198     wxCoord useHeightBitmap = EDIT_HEIGHT_FROM_CHAR_HEIGHT(bitmapSize.y);
 199     if ( best.y < useHeightBitmap )
 200     {
 201         best.y = useHeightBitmap;
 202         CacheBestSize(best);
 203     }
 204     return best;
 205 }
 206
 207 // ----------------------------------------------------------------------------
 208 // Item manipulation
 209 // ----------------------------------------------------------------------------
 210
 211 void wxBitmapComboBox::SetItemBitmap(unsigned int n, const wxBitmap& bitmap)
 212 {
 213     OnAddBitmap(bitmap);
 214     DoSetItemBitmap(n, bitmap);
 215
 216     if ( (int)n == GetSelection() )
 217         Refresh();
 218 }
 219
 220 int wxBitmapComboBox::Append(const wxString& item, const wxBitmap& bitmap)
 221 {
 222     OnAddBitmap(bitmap);
 223     const int n = wxComboBox::Append(item);
 224     if ( n != wxNOT_FOUND )
 225         DoSetItemBitmap(n, bitmap);
 226     return n;
 227 }
 228
 229 int wxBitmapComboBox::Append(const wxString& item, const wxBitmap& bitmap,
 230                              void *clientData)
 231 {
 232     OnAddBitmap(bitmap);
 233     const int n = wxComboBox::Append(item, clientData);
 234     if ( n != wxNOT_FOUND )
 235         DoSetItemBitmap(n, bitmap);
 236     return n;
 237 }
 238
 239 int wxBitmapComboBox::Append(const wxString& item, const wxBitmap& bitmap,
 240                              wxClientData *clientData)
 241 {
 242     OnAddBitmap(bitmap);
 243     const int n = wxComboBox::Append(item, clientData);
 244     if ( n != wxNOT_FOUND )
 245         DoSetItemBitmap(n, bitmap);
 246     return n;
 247 }
 248
 249 int wxBitmapComboBox::Insert(const wxString& item,
 250                              const wxBitmap& bitmap,
 251                              unsigned int pos)
 252 {
 253     OnAddBitmap(bitmap);
 254     const int n = wxComboBox::Insert(item, pos);
 255     if ( n != wxNOT_FOUND )
 256         DoSetItemBitmap(n, bitmap);
 257     return n;
 258 }
 259
 260 int wxBitmapComboBox::Insert(const wxString& item, const wxBitmap& bitmap,
 261                              unsigned int pos, wxClientData *clientData)
 262 {
 263     OnAddBitmap(bitmap);
 264     const int n = wxComboBox::Insert(item, pos, clientData);
 265     if ( n != wxNOT_FOUND )
 266         DoSetItemBitmap(n, bitmap);
 267     return n;
 268 }
 269
 270 int wxBitmapComboBox::DoInsertItems(const wxArrayStringsAdapter & items,
 271                                     unsigned int pos,
 272                                     void **clientData, wxClientDataType type)
 273 {
 274     const unsigned int numItems = items.GetCount();
 275     const unsigned int countNew = GetCount() + numItems;
 276
 277     wxASSERT( numItems == 1 || !HasFlag(wxCB_SORT) );  // Sanity check
 278
 279     m_bitmaps.Alloc(countNew);
 280
 281     for ( unsigned int i = 0; i < numItems; i++ )
 282     {
 283         m_bitmaps.Insert(new wxBitmap(wxNullBitmap), pos + i);
 284     }
 285
 286     const int index = wxComboBox::DoInsertItems(items, pos,
 287                                                 clientData, type);
 288
 289     if ( index == wxNOT_FOUND )
 290     {
 291         for ( int i = numItems-1; i >= 0; i-- )
 292             BCBDoDeleteOneItem(pos + i);
 293     }
 294     else if ( ((unsigned int)index) != pos )
 295     {
 296         // Move pre-inserted empty bitmap into correct position
 297         // (usually happens when combo box has wxCB_SORT style)
 298         wxBitmap* bmp = static_cast<wxBitmap*>(m_bitmaps[pos]);
 299         m_bitmaps.RemoveAt(pos);
 300         m_bitmaps.Insert(bmp, index);
 301     }
 302
 303     return index;
 304 }
 305
 306 bool wxBitmapComboBox::OnAddBitmap(const wxBitmap& bitmap)
 307 {
 308     if ( wxBitmapComboBoxBase::OnAddBitmap(bitmap) )
 309     {
 310         // Need to recreate control for a new measureitem call?
 311         int prevItemHeight = ::SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
 312
 313         if ( prevItemHeight != MeasureItem(0) )
 314             RecreateControl();
 315
 316         return true;
 317     }
 318
 319     return false;
 320 }
 321
 322 void wxBitmapComboBox::DoClear()
 323 {
 324     wxComboBox::DoClear();
 325     wxBitmapComboBoxBase::BCBDoClear();
 326 }
 327
 328 void wxBitmapComboBox::DoDeleteOneItem(unsigned int n)
 329 {
 330     wxComboBox::DoDeleteOneItem(n);
 331     wxBitmapComboBoxBase::BCBDoDeleteOneItem(n);
 332 }
 333
 334 // ----------------------------------------------------------------------------
 335 // wxBitmapComboBox event handlers and such
 336 // ----------------------------------------------------------------------------
 337
 338 void wxBitmapComboBox::OnSize(wxSizeEvent& event)
 339 {
 340     // Prevent infinite looping
 341     if ( !m_inResize )
 342     {
 343         m_inResize = true;
 344         DetermineIndent();
 345         m_inResize = false;
 346     }
 347
 348     event.Skip();
 349 }
 350
 351 // ----------------------------------------------------------------------------
 352 // wxBitmapComboBox miscellaneous
 353 // ----------------------------------------------------------------------------
 354
 355 bool wxBitmapComboBox::SetFont(const wxFont& font)
 356 {
 357     bool res = wxComboBox::SetFont(font);
 358     UpdateInternals();
 359     return res;
 360 }
 361
 362 // ----------------------------------------------------------------------------
 363 // wxBitmapComboBox item drawing and measuring
 364 // ----------------------------------------------------------------------------
 365
 366 bool wxBitmapComboBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 367 {
 368     LPDRAWITEMSTRUCT lpDrawItem = (LPDRAWITEMSTRUCT) item;
 369     int pos = lpDrawItem->itemID;
 370
 371     // Draw default for item -1, which means 'focus rect only'
 372     if ( pos == -1 )
 373         return FALSE;
 374
 375     int flags = 0;
 376     if ( lpDrawItem->itemState & ODS_COMBOBOXEDIT )
 377         flags |= wxODCB_PAINTING_CONTROL;
 378     if ( lpDrawItem->itemState & ODS_SELECTED )
 379         flags |= wxODCB_PAINTING_SELECTED;
 380
 381     wxString text;
 382
 383     if ( flags & wxODCB_PAINTING_CONTROL )
 384     {
 385         text = GetValue();
 386         if ( !HasFlag(wxCB_READONLY) )
 387             text.clear();
 388     }
 389     else
 390     {
 391         text = GetString(pos);
 392     }
 393
 394     wxPaintDCEx dc(this, lpDrawItem->hDC);
 395     wxRect rect = wxRectFromRECT(lpDrawItem->rcItem);
 396     wxBitmapComboBoxBase::DrawBackground(dc, rect, pos, flags);
 397     wxBitmapComboBoxBase::DrawItem(dc, rect, pos, text, flags);
 398
 399     // If the item has the focus, draw focus rectangle.
 400     // Commented out since regular combo box doesn't
 401     // seem to do it either.
 402     //if ( lpDrawItem->itemState & ODS_FOCUS )
 403     //    DrawFocusRect(lpDrawItem->hDC, &lpDrawItem->rcItem);
 404
 405     return TRUE;
 406 }
 407
 408 bool wxBitmapComboBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 409 {
 410     LPMEASUREITEMSTRUCT lpMeasureItem = (LPMEASUREITEMSTRUCT) item;
 411     int pos = lpMeasureItem->itemID;
 412
 413     lpMeasureItem->itemHeight = wxBitmapComboBoxBase::MeasureItem(pos);
 414
 415     return TRUE;
 416 }
 417
 418 #endif // wxUSE_BITMAPCOMBOBOX