src/msw/bmpcbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/bmpcboxg.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"), value, 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
 184 wxBitmapComboBox::~wxBitmapComboBox()
 185 {
 186     Clear();
 187 }
 188
 189 wxSize wxBitmapComboBox::DoGetBestSize() const
 190 {
 191     wxSize best = wxComboBox::DoGetBestSize();
 192     wxSize bitmapSize = GetBitmapSize();
 193
 194     wxCoord useHeightBitmap = EDIT_HEIGHT_FROM_CHAR_HEIGHT(bitmapSize.y);
 195     if ( best.y < useHeightBitmap )
 196     {
 197         best.y = useHeightBitmap;
 198         CacheBestSize(best);
 199     }
 200     return best;
 201 }
 202
 203 // ----------------------------------------------------------------------------
 204 // Item manipulation
 205 // ----------------------------------------------------------------------------
 206
 207 void wxBitmapComboBox::SetItemBitmap(unsigned int n, const wxBitmap& bitmap)
 208 {
 209     OnAddBitmap(bitmap);
 210     DoSetItemBitmap(n, bitmap);
 211
 212     if ( (int)n == GetSelection() )
 213         Refresh();
 214 }
 215
 216 int wxBitmapComboBox::Append(const wxString& item, const wxBitmap& bitmap)
 217 {
 218     OnAddBitmap(bitmap);
 219     const int n = wxComboBox::Append(item);
 220     if ( n != wxNOT_FOUND )
 221         DoSetItemBitmap(n, bitmap);
 222     return n;
 223 }
 224
 225 int wxBitmapComboBox::Append(const wxString& item, const wxBitmap& bitmap,
 226                              void *clientData)
 227 {
 228     OnAddBitmap(bitmap);
 229     const int n = wxComboBox::Append(item, clientData);
 230     if ( n != wxNOT_FOUND )
 231         DoSetItemBitmap(n, bitmap);
 232     return n;
 233 }
 234
 235 int wxBitmapComboBox::Append(const wxString& item, const wxBitmap& bitmap,
 236                              wxClientData *clientData)
 237 {
 238     OnAddBitmap(bitmap);
 239     const int n = wxComboBox::Append(item, clientData);
 240     if ( n != wxNOT_FOUND )
 241         DoSetItemBitmap(n, bitmap);
 242     return n;
 243 }
 244
 245 int wxBitmapComboBox::Insert(const wxString& item,
 246                              const wxBitmap& bitmap,
 247                              unsigned int pos)
 248 {
 249     OnAddBitmap(bitmap);
 250     const int n = wxComboBox::Insert(item, pos);
 251     if ( n != wxNOT_FOUND )
 252         DoSetItemBitmap(n, bitmap);
 253     return n;
 254 }
 255
 256 int wxBitmapComboBox::Insert(const wxString& item, const wxBitmap& bitmap,
 257                              unsigned int pos, wxClientData *clientData)
 258 {
 259     OnAddBitmap(bitmap);
 260     const int n = wxComboBox::Insert(item, pos, clientData);
 261     if ( n != wxNOT_FOUND )
 262         DoSetItemBitmap(n, bitmap);
 263     return n;
 264 }
 265
 266 int wxBitmapComboBox::DoInsertItems(const wxArrayStringsAdapter & items,
 267                                     unsigned int pos,
 268                                     void **clientData, wxClientDataType type)
 269 {
 270     const unsigned int numItems = items.GetCount();
 271     const unsigned int countNew = GetCount() + numItems;
 272
 273     wxASSERT( numItems == 1 || !HasFlag(wxCB_SORT) );  // Sanity check
 274
 275     m_bitmaps.Alloc(countNew);
 276
 277     for ( unsigned int i = 0; i < numItems; i++ )
 278     {
 279         m_bitmaps.Insert(new wxBitmap(wxNullBitmap), pos + i);
 280     }
 281
 282     const int index = wxComboBox::DoInsertItems(items, pos,
 283                                                 clientData, type);
 284
 285     if ( index == wxNOT_FOUND )
 286     {
 287         for ( int i = numItems-1; i >= 0; i-- )
 288             BCBDoDeleteOneItem(pos + i);
 289     }
 290     else if ( ((unsigned int)index) != pos )
 291     {
 292         // Move pre-inserted empty bitmap into correct position
 293         // (usually happens when combo box has wxCB_SORT style)
 294         wxBitmap* bmp = static_cast<wxBitmap*>(m_bitmaps[pos]);
 295         m_bitmaps.RemoveAt(pos);
 296         m_bitmaps.Insert(bmp, index);
 297     }
 298
 299     return index;
 300 }
 301
 302 bool wxBitmapComboBox::OnAddBitmap(const wxBitmap& bitmap)
 303 {
 304     if ( wxBitmapComboBoxBase::OnAddBitmap(bitmap) )
 305     {
 306         // Need to recreate control for a new measureitem call?
 307         int prevItemHeight = ::SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
 308
 309         if ( prevItemHeight != MeasureItem(0) )
 310             RecreateControl();
 311
 312         return true;
 313     }
 314
 315     return false;
 316 }
 317
 318 void wxBitmapComboBox::DoClear()
 319 {
 320     wxComboBox::DoClear();
 321     wxBitmapComboBoxBase::BCBDoClear();
 322 }
 323
 324 void wxBitmapComboBox::DoDeleteOneItem(unsigned int n)
 325 {
 326     wxComboBox::DoDeleteOneItem(n);
 327     wxBitmapComboBoxBase::BCBDoDeleteOneItem(n);
 328 }
 329
 330 // ----------------------------------------------------------------------------
 331 // wxBitmapComboBox event handlers and such
 332 // ----------------------------------------------------------------------------
 333
 334 void wxBitmapComboBox::OnSize(wxSizeEvent& event)
 335 {
 336     // Prevent infinite looping
 337     if ( !m_inResize )
 338     {
 339         m_inResize = true;
 340         DetermineIndent();
 341         m_inResize = false;
 342     }
 343
 344     event.Skip();
 345 }
 346
 347 // ----------------------------------------------------------------------------
 348 // wxBitmapComboBox miscellaneous
 349 // ----------------------------------------------------------------------------
 350
 351 bool wxBitmapComboBox::SetFont(const wxFont& font)
 352 {
 353     bool res = wxComboBox::SetFont(font);
 354     UpdateInternals();
 355     return res;
 356 }
 357
 358 // ----------------------------------------------------------------------------
 359 // wxBitmapComboBox item drawing and measuring
 360 // ----------------------------------------------------------------------------
 361
 362 bool wxBitmapComboBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 363 {
 364     LPDRAWITEMSTRUCT lpDrawItem = (LPDRAWITEMSTRUCT) item;
 365     int pos = lpDrawItem->itemID;
 366
 367     // Draw default for item -1, which means 'focus rect only'
 368     if ( pos == -1 )
 369         return FALSE;
 370
 371     int flags = 0;
 372     if ( lpDrawItem->itemState & ODS_COMBOBOXEDIT )
 373         flags |= wxODCB_PAINTING_CONTROL;
 374     if ( lpDrawItem->itemState & ODS_SELECTED )
 375         flags |= wxODCB_PAINTING_SELECTED;
 376
 377     wxString text;
 378
 379     if ( flags & wxODCB_PAINTING_CONTROL )
 380     {
 381         text = GetValue();
 382         if ( !HasFlag(wxCB_READONLY) )
 383             text.clear();
 384     }
 385     else
 386     {
 387         text = GetString(pos);
 388     }
 389
 390     wxPaintDCEx dc(this, lpDrawItem->hDC);
 391     wxRect rect = wxRectFromRECT(lpDrawItem->rcItem);
 392     wxBitmapComboBoxBase::DrawBackground(dc, rect, pos, flags);
 393     wxBitmapComboBoxBase::DrawItem(dc, rect, pos, text, flags);
 394
 395     // If the item has the focus, draw focus rectangle.
 396     // Commented out since regular combo box doesn't
 397     // seem to do it either.
 398     //if ( lpDrawItem->itemState & ODS_FOCUS )
 399     //    DrawFocusRect(lpDrawItem->hDC, &lpDrawItem->rcItem);
 400
 401     return TRUE;
 402 }
 403
 404 bool wxBitmapComboBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 405 {
 406     LPMEASUREITEMSTRUCT lpMeasureItem = (LPMEASUREITEMSTRUCT) item;
 407     int pos = lpMeasureItem->itemID;
 408
 409     lpMeasureItem->itemHeight = wxBitmapComboBoxBase::MeasureItem(pos);
 410
 411     return TRUE;
 412 }
 413
 414 #endif // wxUSE_BITMAPCOMBOBOX