src/os2/ownerdrw.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/ownerdrw.cpp
   3 // Purpose:     implementation of wxOwnerDrawn class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/12/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifndef WX_PRECOMP
  16   #include "wx/window.h"
  17   #include "wx/msw/private.h"
  18   #include "wx/font.h"
  19   #include "wx/bitmap.h"
  20   #include "wx/dcmemory.h"
  21   #include "wx/menu.h"
  22   #include "wx/utils.h"
  23 #endif
  24
  25 #include "wx/ownerdrw.h"
  26 #include "wx/menuitem.h"
  27
  28
  29 // ============================================================================
  30 // implementation of wxOwnerDrawn class
  31 // ============================================================================
  32
  33 // ctor
  34 // ----
  35 wxOwnerDrawn::wxOwnerDrawn(const wxString& str,
  36                            bool bCheckable, bool bMenuItem)
  37             : m_strName(str)
  38 {
  39   m_bCheckable   = bCheckable;
  40   m_bOwnerDrawn  = FALSE;
  41   m_nHeight      = 0;
  42   m_nMarginWidth = ms_nLastMarginWidth;
  43 }
  44
  45   size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 15;
  46
  47 size_t wxOwnerDrawn::ms_nLastMarginWidth = ms_nDefaultMarginWidth;
  48
  49 // drawing
  50 // -------
  51
  52 // get size of the item
  53 bool wxOwnerDrawn::OnMeasureItem(size_t *pwidth, size_t *pheight)
  54 {
  55   wxMemoryDC dc;
  56   dc.SetFont(GetFont());
  57
  58   // ## ugly...
  59   wxChar *szStripped = new wxChar[m_strName.Len()];
  60   wxStripMenuCodes((wxChar *)m_strName.c_str(), szStripped);
  61   wxString str = szStripped;
  62   delete [] szStripped;
  63
  64   // # without this menu items look too tightly packed (at least under Windows)
  65   str += wxT('W'); // 'W' is typically the widest letter
  66
  67   dc.GetTextExtent(str, (long *)pwidth, (long *)pheight);
  68
  69   // JACS: items still look too tightly packed, so adding 2 pixels.
  70   (*pheight) = (*pheight) + 2;
  71
  72   m_nHeight = *pheight;                // remember height for use in OnDrawItem
  73
  74   return TRUE;
  75 }
  76
  77 // searching for this macro you'll find all the code where I'm using the native
  78 // Win32 GDI functions and not wxWindows ones. Might help to whoever decides to
  79 // port this code to X. (VZ)
  80
  81 // JACS: TODO. Why does a disabled but highlighted item still
  82 // get drawn embossed? How can we tell DrawState that we don't want the
  83 // embossing?
  84
  85 // draw the item
  86 bool wxOwnerDrawn::OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus st)
  87 {
  88 ///////////////////////////////////////////////////////////////////////////////////////////////////
  89 // Might want to check the native drawing apis for here and doo something like MSW does for WIN95
  90 ///////////////////////////////////////////////////////////////////////////////////////////////////
  91
  92   // we do nothing on focus change
  93   if ( act == wxODFocusChanged )
  94     return TRUE;
  95
  96   // wxColor <-> RGB
  97   #define   ToRGB(col)  RGB(col.Red(), col.Green(), col.Blue())
  98   #define   UnRGB(col)  GetRValue(col), GetGValue(col), GetBValue(col)
  99
 100   // set the colors
 101   // --------------
 102   DWORD colBack, colText;
 103   if ( st & wxODSelected ) {
 104     colBack = GetSysColor(COLOR_HIGHLIGHT);
 105     colText = GetSysColor(COLOR_HIGHLIGHTTEXT);
 106   }
 107   else {
 108     // fall back to default colors if none explicitly specified
 109     colBack = m_colBack.Ok() ? ToRGB(m_colBack) : GetSysColor(COLOR_WINDOW);
 110     colText = m_colText.Ok() ? ToRGB(m_colText) : GetSysColor(COLOR_WINDOWTEXT);
 111   }
 112
 113     dc.SetTextForeground(wxColor(UnRGB(colText)));
 114     dc.SetTextBackground(wxColor(UnRGB(colBack)));
 115
 116   // select the font and draw the text
 117   // ---------------------------------
 118
 119   // determine where to draw and leave space for a check-mark.
 120   int x = rc.x + GetMarginWidth();
 121
 122     dc.SetFont(GetFont());
 123     dc.DrawText(m_strName, x, rc.y);
 124
 125   // draw the bitmap
 126   // ---------------
 127   if ( IsCheckable() && !m_bmpChecked.Ok() ) {
 128     if ( st & wxODChecked ) {
 129       // using native APIs for performance and simplicity
 130 // TODO:
 131 /*
 132       HDC hdcMem = CreateCompatibleDC(hdc);
 133       HBITMAP hbmpCheck = CreateBitmap(GetMarginWidth(), m_nHeight, 1, 1, 0);
 134       SelectObject(hdcMem, hbmpCheck);
 135         // then draw a check mark into it
 136       RECT rect = { 0, 0, GetMarginWidth(), m_nHeight };
 137
 138         // finally copy it to screen DC and clean up
 139       BitBlt(hdc, rc.x, rc.y, GetMarginWidth(), m_nHeight,
 140              hdcMem, 0, 0, SRCCOPY);
 141       DeleteDC(hdcMem);
 142 */
 143 #else
 144         // #### to do: perhaps using Marlett font (create equiv. font under X)
 145 //        wxFAIL("not implemented");
 146 #endif  //O_DRAW_NATIVE_API
 147     }
 148   }
 149   else {
 150     // for uncheckable item we use only the 'checked' bitmap
 151     wxBitmap bmp(GetBitmap(IsCheckable() ? ((st & wxODChecked) != 0) : TRUE));
 152     if ( bmp.Ok() ) {
 153       wxMemoryDC dcMem(&dc);
 154       dcMem.SelectObject(bmp);
 155
 156       // center bitmap
 157       int nBmpWidth = bmp.GetWidth(),
 158           nBmpHeight = bmp.GetHeight();
 159
 160       // there should be enough place!
 161       wxASSERT((nBmpWidth <= rc.GetWidth()) && (nBmpHeight <= rc.GetHeight()));
 162
 163       //MT: blit with mask enabled.
 164       dc.Blit(rc.x + (GetMarginWidth() - nBmpWidth) / 2,
 165               rc.y + (m_nHeight - nBmpHeight) /2,
 166               nBmpWidth, nBmpHeight,
 167               &dcMem, 0, 0, wxCOPY,true);
 168
 169       if ( st & wxODSelected ) {
 170 // TODO:
 171 /*
 172         #ifdef  O_DRAW_NATIVE_API
 173           RECT rectBmp = { rc.GetLeft(), rc.GetTop(),
 174                            rc.GetLeft() + GetMarginWidth(),
 175                            rc.GetTop() + m_nHeight };
 176           SetBkColor(hdc, colBack);
 177           DrawEdge(hdc, &rectBmp, EDGE_RAISED, BF_SOFT | BF_RECT);
 178 */
 179       }
 180     }
 181   }
 182 /*
 183   #ifdef  O_DRAW_NATIVE_API
 184     ::SetTextColor(hdc, colOldText);
 185     ::SetBkColor(hdc, colOldBack);
 186
 187     #undef  hdc
 188   #endif  //O_DRAW_NATIVE_API
 189 */
 190   return TRUE;
 191 }
 192