src/common/bmpcboxcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/bmpcboxcmn.cpp
   3 // Purpose:     wxBitmapComboBox
   4 // Author:      Jaakko Salli
   5 // Created:     2008-04-09
   6 // Copyright:   (c) 2008 Jaakko Salli
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // ============================================================================
  11 // declarations
  12 // ============================================================================
  13
  14 // ----------------------------------------------------------------------------
  15 // headers
  16 // ----------------------------------------------------------------------------
  17
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21     #pragma hdrstop
  22 #endif
  23
  24 #include "wx/bmpcbox.h"
  25
  26 #if wxUSE_BITMAPCOMBOBOX
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/log.h"
  30     #include "wx/dc.h"
  31     #include "wx/ctrlsub.h"
  32 #endif
  33
  34 #include "wx/settings.h"
  35
  36 // For wxODCB_XXX flags
  37 #include "wx/odcombo.h"
  38
  39
  40 const char wxBitmapComboBoxNameStr[] = "bitmapComboBox";
  41
  42 #if defined(wxBITMAPCOMBOBOX_OWNERDRAWN_BASED)
  43
  44 #define IMAGE_SPACING_RIGHT         4  // Space left of image
  45
  46 #define IMAGE_SPACING_LEFT          4  // Space right of image, left of text
  47
  48 #define EXTRA_FONT_HEIGHT           0  // Add to increase min. height of list items
  49
  50 #define wxBCB_DEFAULT_ITEM_HEIGHT  13
  51
  52
  53 // This macros allows wxArrayPtrVoid to be used in more convenient manner
  54 #define GetBitmapPtr(n)     ((wxBitmap*)m_bitmaps[n])
  55
  56
  57 // ----------------------------------------------------------------------------
  58 // Initialization
  59 // ----------------------------------------------------------------------------
  60
  61 void wxBitmapComboBoxBase::Init()
  62 {
  63     m_fontHeight = 0;
  64     m_imgAreaWidth = 0;
  65     m_indent = 0;
  66     m_usedImgSize = wxSize(-1, -1);
  67 }
  68
  69 void wxBitmapComboBoxBase::UpdateInternals()
  70 {
  71     m_fontHeight = GetControl()->GetCharHeight() + EXTRA_FONT_HEIGHT;
  72
  73     while ( m_bitmaps.GetCount() < GetItemContainer()->GetCount() )
  74         m_bitmaps.Add( new wxBitmap() );
  75 }
  76
  77 // ----------------------------------------------------------------------------
  78 // Item manipulation
  79 // ----------------------------------------------------------------------------
  80
  81 void wxBitmapComboBoxBase::DoSetItemBitmap(unsigned int n, const wxBitmap& bitmap)
  82 {
  83     wxCHECK_RET( n < m_bitmaps.size(), "invalid item index" );
  84     *GetBitmapPtr(n) = bitmap;
  85 }
  86
  87 wxBitmap wxBitmapComboBoxBase::GetItemBitmap(unsigned int n) const
  88 {
  89     wxCHECK_MSG( n < m_bitmaps.size(), wxNullBitmap, "invalid item index" );
  90     return *GetBitmapPtr(n);
  91 }
  92
  93 // ----------------------------------------------------------------------------
  94 // wxItemContainer methods
  95 // ----------------------------------------------------------------------------
  96
  97 void wxBitmapComboBoxBase::BCBDoClear()
  98 {
  99     for ( unsigned i = 0; i < m_bitmaps.size(); i++ )
 100         delete GetBitmapPtr(i);
 101
 102     m_bitmaps.Empty();
 103
 104     m_usedImgSize.x = -1;
 105     m_usedImgSize.y = -1;
 106
 107     DetermineIndent();
 108 }
 109
 110 void wxBitmapComboBoxBase::BCBDoDeleteOneItem(unsigned int n)
 111 {
 112     delete GetBitmapPtr(n);
 113     m_bitmaps.RemoveAt(n);
 114 }
 115
 116 // ----------------------------------------------------------------------------
 117 // Preparation and Calculations
 118 // ----------------------------------------------------------------------------
 119
 120 bool wxBitmapComboBoxBase::OnAddBitmap(const wxBitmap& bitmap)
 121 {
 122     if ( bitmap.IsOk() )
 123     {
 124         int width = bitmap.GetWidth();
 125         int height = bitmap.GetHeight();
 126
 127         if ( m_usedImgSize.x < 0 )
 128         {
 129             // If size not yet determined, get it from this image.
 130             m_usedImgSize.x = width;
 131             m_usedImgSize.y = height;
 132
 133             // Adjust control size to vertically fit the bitmap
 134             wxWindow* ctrl = GetControl();
 135             ctrl->InvalidateBestSize();
 136             wxSize newSz = ctrl->GetBestSize();
 137             wxSize sz = ctrl->GetSize();
 138             if ( newSz.y > sz.y )
 139                 ctrl->SetSize(sz.x, newSz.y);
 140             else
 141                 DetermineIndent();
 142         }
 143
 144         wxCHECK_MSG( width == m_usedImgSize.x && height == m_usedImgSize.y,
 145                      false,
 146                      "you can only add images of same size" );
 147
 148         return true;
 149     }
 150
 151     return false;
 152 }
 153
 154 int wxBitmapComboBoxBase::DetermineIndent()
 155 {
 156     // Recalculate amount of empty space needed in front of
 157     // text in control itself.
 158     int indent = m_imgAreaWidth = 0;
 159
 160     if ( m_usedImgSize.x > 0 )
 161     {
 162         indent = m_usedImgSize.x + IMAGE_SPACING_LEFT + IMAGE_SPACING_RIGHT;
 163         m_imgAreaWidth = indent;
 164
 165         indent -= 3;
 166     }
 167
 168     return indent;
 169 }
 170
 171 // ----------------------------------------------------------------------------
 172 // Item drawing and measuring
 173 // ----------------------------------------------------------------------------
 174
 175 void wxBitmapComboBoxBase::DrawBackground(wxDC& dc,
 176                                           const wxRect& rect,
 177                                           int WXUNUSED(item),
 178                                           int flags) const
 179 {
 180     if ( flags & wxODCB_PAINTING_SELECTED )
 181     {
 182         const int vSizeDec = 0;  // Vertical size reduction of selection rectangle edges
 183
 184         dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT));
 185
 186         wxColour selCol = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
 187         dc.SetPen(selCol);
 188         dc.SetBrush(selCol);
 189         dc.DrawRectangle(rect.x,
 190                          rect.y+vSizeDec,
 191                          rect.width,
 192                          rect.height-(vSizeDec*2));
 193     }
 194     else
 195     {
 196         dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 197
 198         wxColour selCol = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 199         dc.SetPen(selCol);
 200         dc.SetBrush(selCol);
 201         dc.DrawRectangle(rect);
 202     }
 203 }
 204
 205 void wxBitmapComboBoxBase::DrawItem(wxDC& dc,
 206                                     const wxRect& rect,
 207                                     int item,
 208                                     const wxString& text,
 209                                     int WXUNUSED(flags)) const
 210 {
 211     const wxBitmap& bmp = *GetBitmapPtr(item);
 212     if ( bmp.IsOk() )
 213     {
 214         wxCoord w = bmp.GetWidth();
 215         wxCoord h = bmp.GetHeight();
 216
 217         // Draw the image centered
 218         dc.DrawBitmap(bmp,
 219                       rect.x + (m_usedImgSize.x-w)/2 + IMAGE_SPACING_LEFT,
 220                       rect.y + (rect.height-h)/2,
 221                       true);
 222     }
 223
 224     if ( !text.empty() )
 225         dc.DrawText(text,
 226                     rect.x + m_imgAreaWidth + 1,
 227                     rect.y + (rect.height-dc.GetCharHeight())/2);
 228 }
 229
 230 wxCoord wxBitmapComboBoxBase::MeasureItem(size_t WXUNUSED(item)) const
 231 {
 232     if ( m_usedImgSize.y >= 0 )
 233     {
 234         int imgHeightArea = m_usedImgSize.y + 2;
 235         return imgHeightArea > m_fontHeight ? imgHeightArea : m_fontHeight;
 236     }
 237
 238     return wxBCB_DEFAULT_ITEM_HEIGHT;
 239 }
 240
 241 #endif // wxBITMAPCOMBOBOX_OWNERDRAWN_BASED
 242
 243 #endif // wxUSE_BITMAPCOMBOBOX