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