src/common/bmpcboxcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/bmpcboxcmn.cpp
   3 // Purpose:     wxBitmapComboBox
   4 // Author:      Jaakko Salli
   5 // Created:     2008-04-09
   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 #include "wx/bmpcbox.h"
  26
  27 #if wxUSE_BITMAPCOMBOBOX
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/log.h"
  31     #include "wx/dc.h"
  32     #include "wx/ctrlsub.h"
  33 #endif
  34
  35 #include "wx/settings.h"
  36
  37 // For wxODCB_XXX flags
  38 #include "wx/odcombo.h"
  39
  40
  41 const char wxBitmapComboBoxNameStr[] = "bitmapComboBox";
  42
  43 #if defined(wxBITMAPCOMBOBOX_OWNERDRAWN_BASED)
  44
  45 #define IMAGE_SPACING_RIGHT         4  // Space left of image
  46
  47 #define IMAGE_SPACING_LEFT          4  // Space right of image, left of text
  48
  49 #define EXTRA_FONT_HEIGHT           0  // Add to increase min. height of list items
  50
  51 #define wxBCB_DEFAULT_ITEM_HEIGHT  13
  52
  53
  54 // This macros allows wxArrayPtrVoid to be used in more convenient manner
  55 #define GetBitmapPtr(n)     ((wxBitmap*)m_bitmaps[n])
  56
  57
  58 // ----------------------------------------------------------------------------
  59 // Initialization
  60 // ----------------------------------------------------------------------------
  61
  62 void wxBitmapComboBoxBase::Init()
  63 {
  64     m_fontHeight = 0;
  65     m_imgAreaWidth = 0;
  66     m_indent = 0;
  67     m_usedImgSize = wxSize(-1, -1);
  68 }
  69
  70 void wxBitmapComboBoxBase::UpdateInternals()
  71 {
  72     m_fontHeight = GetControl()->GetCharHeight() + EXTRA_FONT_HEIGHT;
  73
  74     while ( m_bitmaps.GetCount() < GetItemContainer()->GetCount() )
  75         m_bitmaps.Add( new wxBitmap() );
  76 }
  77
  78 // ----------------------------------------------------------------------------
  79 // Item manipulation
  80 // ----------------------------------------------------------------------------
  81
  82 void wxBitmapComboBoxBase::DoSetItemBitmap(unsigned int n, const wxBitmap& bitmap)
  83 {
  84     wxCHECK_RET( n < m_bitmaps.size(), "invalid item index" );
  85     *GetBitmapPtr(n) = bitmap;
  86 }
  87
  88 wxBitmap wxBitmapComboBoxBase::GetItemBitmap(unsigned int n) const
  89 {
  90     wxCHECK_MSG( n < m_bitmaps.size(), wxNullBitmap, "invalid item index" );
  91     return *GetBitmapPtr(n);
  92 }
  93
  94 // ----------------------------------------------------------------------------
  95 // wxItemContainer methods
  96 // ----------------------------------------------------------------------------
  97
  98 void wxBitmapComboBoxBase::BCBDoClear()
  99 {
 100     for ( unsigned i = 0; i < m_bitmaps.size(); i++ )
 101         delete GetBitmapPtr(i);
 102
 103     m_bitmaps.Empty();
 104
 105     m_usedImgSize.x = -1;
 106     m_usedImgSize.y = -1;
 107
 108     DetermineIndent();
 109 }
 110
 111 void wxBitmapComboBoxBase::BCBDoDeleteOneItem(unsigned int n)
 112 {
 113     delete GetBitmapPtr(n);
 114     m_bitmaps.RemoveAt(n);
 115 }
 116
 117 // ----------------------------------------------------------------------------
 118 // Preparation and Calculations
 119 // ----------------------------------------------------------------------------
 120
 121 bool wxBitmapComboBoxBase::OnAddBitmap(const wxBitmap& bitmap)
 122 {
 123     if ( bitmap.IsOk() )
 124     {
 125         int width = bitmap.GetWidth();
 126         int height = bitmap.GetHeight();
 127
 128         if ( m_usedImgSize.x < 0 )
 129         {
 130             // If size not yet determined, get it from this image.
 131             m_usedImgSize.x = width;
 132             m_usedImgSize.y = height;
 133
 134             // Adjust control size to vertically fit the bitmap
 135             wxWindow* ctrl = GetControl();
 136             ctrl->InvalidateBestSize();
 137             wxSize newSz = ctrl->GetBestSize();
 138             wxSize sz = ctrl->GetSize();
 139             if ( newSz.y > sz.y )
 140                 ctrl->SetSize(sz.x, newSz.y);
 141             else
 142                 DetermineIndent();
 143         }
 144
 145         wxCHECK_MSG( width == m_usedImgSize.x && height == m_usedImgSize.y,
 146                      false,
 147                      "you can only add images of same size" );
 148
 149         return true;
 150     }
 151
 152     return false;
 153 }
 154
 155 int wxBitmapComboBoxBase::DetermineIndent()
 156 {
 157     // Recalculate amount of empty space needed in front of
 158     // text in control itself.
 159     int indent = m_imgAreaWidth = 0;
 160
 161     if ( m_usedImgSize.x > 0 )
 162     {
 163         indent = m_usedImgSize.x + IMAGE_SPACING_LEFT + IMAGE_SPACING_RIGHT;
 164         m_imgAreaWidth = indent;
 165
 166         indent -= 3;
 167     }
 168
 169     return indent;
 170 }
 171
 172 // ----------------------------------------------------------------------------
 173 // Item drawing and measuring
 174 // ----------------------------------------------------------------------------
 175
 176 void wxBitmapComboBoxBase::DrawBackground(wxDC& dc,
 177                                           const wxRect& rect,
 178                                           int WXUNUSED(item),
 179                                           int flags) const
 180 {
 181     if ( flags & wxODCB_PAINTING_SELECTED )
 182     {
 183         const int vSizeDec = 0;  // Vertical size reduction of selection rectangle edges
 184
 185         dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT));
 186
 187         wxColour selCol = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
 188         dc.SetPen(selCol);
 189         dc.SetBrush(selCol);
 190         dc.DrawRectangle(rect.x,
 191                          rect.y+vSizeDec,
 192                          rect.width,
 193                          rect.height-(vSizeDec*2));
 194     }
 195     else
 196     {
 197         dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 198
 199         wxColour selCol = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 200         dc.SetPen(selCol);
 201         dc.SetBrush(selCol);
 202         dc.DrawRectangle(rect);
 203     }
 204 }
 205
 206 void wxBitmapComboBoxBase::DrawItem(wxDC& dc,
 207                                     const wxRect& rect,
 208                                     int item,
 209                                     const wxString& text,
 210                                     int WXUNUSED(flags)) const
 211 {
 212     const wxBitmap& bmp = *GetBitmapPtr(item);
 213     if ( bmp.IsOk() )
 214     {
 215         wxCoord w = bmp.GetWidth();
 216         wxCoord h = bmp.GetHeight();
 217
 218         // Draw the image centered
 219         dc.DrawBitmap(bmp,
 220                       rect.x + (m_usedImgSize.x-w)/2 + IMAGE_SPACING_LEFT,
 221                       rect.y + (rect.height-h)/2,
 222                       true);
 223     }
 224
 225     if ( !text.empty() )
 226         dc.DrawText(text,
 227                     rect.x + m_imgAreaWidth + 1,
 228                     rect.y + (rect.height-dc.GetCharHeight())/2);
 229 }
 230
 231 wxCoord wxBitmapComboBoxBase::MeasureItem(size_t WXUNUSED(item)) const
 232 {
 233     if ( m_usedImgSize.y >= 0 )
 234     {
 235         int imgHeightArea = m_usedImgSize.y + 2;
 236         return imgHeightArea > m_fontHeight ? imgHeightArea : m_fontHeight;
 237     }
 238
 239     return wxBCB_DEFAULT_ITEM_HEIGHT;
 240 }
 241
 242 #endif // wxBITMAPCOMBOBOX_OWNERDRAWN_BASED
 243
 244 #endif // wxUSE_BITMAPCOMBOBOX