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