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 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifndef WX_PRECOMP
  20   #include "wx/window.h"
  21   #include "wx/msw/private.h"
  22   #include "wx/font.h"
  23   #include "wx/bitmap.h"
  24   #include "wx/dcmemory.h"
  25   #include "wx/menu.h"
  26   #include "wx/utils.h"
  27 #endif
  28
  29 #if wxUSE_OWNER_DRAWN
  30
  31 #include "wx/ownerdrw.h"
  32 #include "wx/menuitem.h"
  33
  34
  35 // ============================================================================
  36 // implementation of wxOwnerDrawn class
  37 // ============================================================================
  38
  39 // ctor
  40 // ----
  41 wxOwnerDrawn::wxOwnerDrawn(const wxString& str,
  42                            bool bCheckable, bool bMenuItem)
  43             : m_strName(str)
  44 {
  45   m_bCheckable   = bCheckable;
  46   m_bOwnerDrawn  = FALSE;
  47   m_nHeight      = 0;
  48   m_nMarginWidth = ms_nLastMarginWidth;
  49 }
  50
  51   size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 15;
  52
  53 size_t wxOwnerDrawn::ms_nLastMarginWidth = ms_nDefaultMarginWidth;
  54
  55 // drawing
  56 // -------
  57
  58 // get size of the item
  59 bool wxOwnerDrawn::OnMeasureItem(size_t *pwidth, size_t *pheight)
  60 {
  61   wxMemoryDC dc;
  62   dc.SetFont(GetFont());
  63
  64   // ## ugly...
  65   wxChar *szStripped = new wxChar[m_strName.Len()];
  66   wxStripMenuCodes((wxChar *)m_strName.c_str(), szStripped);
  67   wxString str = szStripped;
  68   delete [] szStripped;
  69
  70   // # without this menu items look too tightly packed (at least under Windows)
  71   str += wxT('W'); // 'W' is typically the widest letter
  72
  73   dc.GetTextExtent(str, (long *)pwidth, (long *)pheight);
  74
  75   // JACS: items still look too tightly packed, so adding 2 pixels.
  76   (*pheight) = (*pheight) + 2;
  77
  78   m_nHeight = *pheight;                // remember height for use in OnDrawItem
  79
  80   return TRUE;
  81 }
  82
  83 // searching for this macro you'll find all the code where I'm using the native
  84 // Win32 GDI functions and not wxWindows ones. Might help to whoever decides to
  85 // port this code to X. (VZ)
  86
  87 // JACS: TODO. Why does a disabled but highlighted item still
  88 // get drawn embossed? How can we tell DrawState that we don't want the
  89 // embossing?
  90
  91 // draw the item
  92 bool wxOwnerDrawn::OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus st)
  93 {
  94 ///////////////////////////////////////////////////////////////////////////////////////////////////
  95 // Might want to check the native drawing apis for here and doo something like MSW does for WIN95
  96 ///////////////////////////////////////////////////////////////////////////////////////////////////
  97
  98   // we do nothing on focus change
  99   if ( act == wxODFocusChanged )
 100     return TRUE;
 101
 102   // wxColor <-> RGB
 103   #define   ToRGB(col)  RGB(col.Red(), col.Green(), col.Blue())
 104   #define   UnRGB(col)  GetRValue(col), GetGValue(col), GetBValue(col)
 105
 106   // set the colors
 107   // --------------
 108   DWORD colBack, colText;
 109 // TODO:
 110 /*
 111   if ( st & wxODSelected ) {
 112     colBack = GetSysColor(COLOR_HIGHLIGHT);
 113     colText = GetSysColor(COLOR_HIGHLIGHTTEXT);
 114   }
 115   else {
 116     // fall back to default colors if none explicitly specified
 117     colBack = m_colBack.Ok() ? ToRGB(m_colBack) : GetSysColor(COLOR_WINDOW);
 118     colText = m_colText.Ok() ? ToRGB(m_colText) : GetSysColor(COLOR_WINDOWTEXT);
 119   }
 120 */
 121 //    dc.SetTextForeground(wxColor(UnRGB(colText)));
 122 //    dc.SetTextBackground(wxColor(UnRGB(colBack)));
 123
 124   // select the font and draw the text
 125   // ---------------------------------
 126
 127   // determine where to draw and leave space for a check-mark.
 128   int x = rc.x + GetMarginWidth();
 129
 130     dc.SetFont(GetFont());
 131     dc.DrawText(m_strName, x, rc.y);
 132
 133   // draw the bitmap
 134   // ---------------
 135   if ( IsCheckable() && !m_bmpChecked.Ok() ) {
 136     if ( st & wxODChecked ) {
 137       // using native APIs for performance and simplicity
 138 // TODO:
 139 /*
 140       HDC hdcMem = CreateCompatibleDC(hdc);
 141       HBITMAP hbmpCheck = CreateBitmap(GetMarginWidth(), m_nHeight, 1, 1, 0);
 142       SelectObject(hdcMem, hbmpCheck);
 143         // then draw a check mark into it
 144       RECT rect = { 0, 0, GetMarginWidth(), m_nHeight };
 145
 146         // finally copy it to screen DC and clean up
 147       BitBlt(hdc, rc.x, rc.y, GetMarginWidth(), m_nHeight,
 148              hdcMem, 0, 0, SRCCOPY);
 149       DeleteDC(hdcMem);
 150 */
 151     }
 152   }
 153   else {
 154     // for uncheckable item we use only the 'checked' bitmap
 155     wxBitmap bmp(GetBitmap(IsCheckable() ? ((st & wxODChecked) != 0) : TRUE));
 156     if ( bmp.Ok() ) {
 157       wxMemoryDC dcMem(&dc);
 158       dcMem.SelectObject(bmp);
 159
 160       // center bitmap
 161       int nBmpWidth = bmp.GetWidth(),
 162           nBmpHeight = bmp.GetHeight();
 163
 164       // there should be enough place!
 165       wxASSERT((nBmpWidth <= rc.GetWidth()) && (nBmpHeight <= rc.GetHeight()));
 166
 167       //MT: blit with mask enabled.
 168 // TODO:
 169 /*
 170       dc.Blit(rc.x + (GetMarginWidth() - nBmpWidth) / 2,
 171               rc.y + (m_nHeight - nBmpHeight) /2,
 172               nBmpWidth, nBmpHeight,
 173               &dcMem, 0, 0, wxCOPY,true);
 174
 175       if ( st & wxODSelected ) {
 176         #ifdef  O_DRAW_NATIVE_API
 177           RECT rectBmp = { rc.GetLeft(), rc.GetTop(),
 178                            rc.GetLeft() + GetMarginWidth(),
 179                            rc.GetTop() + m_nHeight };
 180           SetBkColor(hdc, colBack);
 181           DrawEdge(hdc, &rectBmp, EDGE_RAISED, BF_SOFT | BF_RECT);
 182       }
 183 */
 184     }
 185   }
 186 /*
 187   #ifdef  O_DRAW_NATIVE_API
 188     ::SetTextColor(hdc, colOldText);
 189     ::SetBkColor(hdc, colOldBack);
 190
 191     #undef  hdc
 192   #endif  //O_DRAW_NATIVE_API
 193 */
 194   return TRUE;
 195 }
 196
 197 #endif //wxUSE_OWNER_DRAWN