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 //
  40 // ctor
  41 // ----
  42 //
  43 wxOwnerDrawn::wxOwnerDrawn(
  44   const wxString&                   rsStr
  45 , bool                              bCheckable
  46 , bool                              bMenuItem
  47 )
  48 : m_strName(rsStr)
  49 {
  50     m_bCheckable   = bCheckable;
  51     m_bOwnerDrawn  = FALSE;
  52     m_nHeight      = 0;
  53     m_nMarginWidth = ms_nLastMarginWidth;
  54     if (wxNORMAL_FONT)
  55         m_font = *wxNORMAL_FONT;
  56 } // end of wxOwnerDrawn::wxOwnerDrawn
  57
  58 size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 15;
  59
  60 size_t wxOwnerDrawn::ms_nLastMarginWidth = ms_nDefaultMarginWidth;
  61
  62 //
  63 // Drawing
  64 // -------
  65 //
  66
  67 bool wxOwnerDrawn::OnMeasureItem(
  68   size_t*                           pWidth
  69 , size_t*                           pHeight
  70 )
  71 {
  72     wxMemoryDC                      vDC;
  73
  74     vDC.SetFont(GetFont());
  75
  76     wxString                        sStr = wxStripMenuCodes(m_strName);
  77
  78     vDC.GetTextExtent( sStr
  79                       ,(long *)pWidth
  80                       ,(long *)pHeight
  81                      );
  82
  83     (*pHeight) = (*pHeight) + 2;
  84     m_nHeight = *pHeight;        // remember height for use in OnDrawItem
  85     return TRUE;
  86 } // end of wxOwnerDrawn::OnMeasureItem
  87
  88 // draw the item
  89 bool wxOwnerDrawn::OnDrawItem(
  90   wxDC&                             rDC
  91 , const wxRect&                     rRect
  92 , wxODAction                        eAction
  93 , wxODStatus                        eStatus
  94 )
  95 {
  96     //
  97     // We do nothing on focus change
  98     //
  99     if (eAction == wxODFocusChanged )
 100         return TRUE;
 101
 102     //
 103     // Select the font and draw the text
 104     // ---------------------------------
 105     //
 106
 107     CHARBUNDLE                      vCbnd;
 108     HPS                             hPS= rDC.GetHPS();
 109     wxColour                        vColBack;
 110     wxColour                        vColText;
 111     COLORREF                        vRef;
 112     RECTL                           vRect = {rRect.x + 4, rRect.y + 1, rRect.x + (rRect.width - 2), rRect.y + rRect.height};
 113
 114     memset(&vCbnd, 0, sizeof(CHARBUNDLE));
 115
 116     //
 117     // Use default font if no font set
 118     //
 119     if (m_font.Ok())
 120     {
 121         m_font.RealizeResource();
 122     }
 123     else
 124     {
 125         ::GpiSetCharSet(hPS, LCID_DEFAULT);
 126     }
 127
 128     //
 129     // Base on the status of the menu item pick the right colors
 130     //
 131     if (eStatus & wxODSelected)
 132     {
 133         wxColour                        vCol2("WHITE");
 134         vColBack.Set( (unsigned char)0
 135                      ,(unsigned char)0
 136                      ,(unsigned char)160
 137                     ); // no dark blue in color table
 138         vColText = vCol2;
 139     }
 140     else if (eStatus & wxODDisabled)
 141     {
 142         vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
 143                                          ,SYSCLR_MENU // Light gray
 144                                          ,0L
 145                                         );
 146         vColBack.Set( GetRValue(vRef)
 147                      ,GetGValue(vRef)
 148                      ,GetBValue(vRef)
 149                     );
 150         vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
 151                                          ,SYSCLR_MENUDISABLEDTEXT // dark gray
 152                                          ,0L
 153                                         );
 154         vColText.Set( GetRValue(vRef)
 155                      ,GetGValue(vRef)
 156                      ,GetBValue(vRef)
 157                     );
 158     }
 159     else
 160     {
 161         //
 162         // Fall back to default colors if none explicitly specified
 163         //
 164         vRef = ::WinQuerySysColor( HWND_DESKTOP
 165                                   ,SYSCLR_MENU  // we are using gray for all our window backgrounds in wxWindows
 166                                   ,0L
 167                                  );
 168         vColBack.Set( GetRValue(vRef)
 169                      ,GetGValue(vRef)
 170                      ,GetBValue(vRef)
 171                     );
 172         vRef = ::WinQuerySysColor( HWND_DESKTOP
 173                                   ,SYSCLR_WINDOWTEXT // Black
 174                                   ,0L
 175                                  );
 176         vColText.Set( GetRValue(vRef)
 177                      ,GetGValue(vRef)
 178                      ,GetBValue(vRef)
 179                     );
 180     }
 181
 182     rDC.SetTextBackground(vColBack);
 183     rDC.SetTextForeground(vColText);
 184     rDC.SetBackgroundMode(wxTRANSPARENT);
 185     vCbnd.lColor     = vColText.GetPixel();
 186     vCbnd.lBackColor = vColBack.GetPixel();
 187     ::GpiSetAttrs( hPS
 188                   ,PRIM_CHAR
 189                   ,CBB_BACK_COLOR | CBB_COLOR
 190                   ,0
 191                   ,&vCbnd
 192                  );
 193     ::GpiSetBackMix( hPS
 194                     ,BM_LEAVEALONE
 195                    );
 196
 197     //
 198     // Paint the background
 199     //
 200     ::WinFillRect(hPS, &vRect, vColBack.GetPixel());
 201
 202     //
 203     // Determine where to draw and leave space for a check-mark.
 204     //
 205     int                             nX = rRect.x + GetMarginWidth();
 206
 207     //
 208     // Unfortunately, unlike Win32, PM has no owner drawn specific text
 209     // drawing methods like ::DrawState that can cleanly handle accel
 210     // pneumonics and deal, automatically, with various states, so we have
 211     // to handle them ourselves. Notice Win32 can't handle \t in ownerdrawn
 212     // strings either.  We cannot handle mneumonics either.  We display
 213     // it, though, in hopes we can figure it out some day.
 214     //
 215
 216     //
 217     // Display main text and accel text separately to allign better
 218     //
 219     wxString                        sTgt = "\t";
 220     wxString                        sFullString = m_strName; // need to save the original text
 221     wxString                        sAccel;
 222     size_t                          nIndex;
 223     size_t                          nWidth;
 224     size_t                          nCharWidth;
 225     size_t                          nHeight;
 226     bool                            bFoundMneumonic = FALSE;
 227     bool                            bFoundAccel = FALSE;
 228
 229     //
 230     // Deal with the tab, extracting the Accel text
 231     //
 232     nIndex = sFullString.Find(sTgt.c_str());
 233     if (nIndex != -1)
 234     {
 235         bFoundAccel = TRUE;
 236         sAccel = sFullString.Mid(nIndex + 1);
 237         sFullString.Remove(nIndex);
 238     }
 239
 240     //
 241     // Deal with the mneumonic character
 242     //
 243     sTgt = "~";
 244     nIndex = sFullString.Find(sTgt.c_str());
 245     if (nIndex != -1)
 246     {
 247         wxString                    sTmp = sFullString;
 248
 249         bFoundMneumonic = TRUE;
 250         sTmp.Remove(nIndex);
 251         rDC.GetTextExtent( sTmp
 252                           ,(long *)&nWidth
 253                           ,(long *)&nHeight
 254                          );
 255         sTmp = sFullString[nIndex + 1];
 256         rDC.GetTextExtent( sTmp
 257                           ,(long *)&nCharWidth
 258                           ,(long *)&nHeight
 259                          );
 260         sFullString.Replace(sTgt.c_str(), "", TRUE);
 261     }
 262
 263     //
 264     // Draw the main item text sans the accel text
 265     //
 266     POINTL                      vPntStart = {nX, rRect.y + 4};
 267     ::GpiCharStringAt( rDC.GetHPS()
 268                       ,&vPntStart
 269                       ,sFullString.length()
 270                       ,(PCH)sFullString.c_str()
 271                      );
 272     if (bFoundMneumonic)
 273     {
 274         //
 275         // Underline the mneumonic -- still won't work, but at least it "looks" right
 276         //
 277         wxPen                       vPen;
 278         POINTL                      vPntEnd = {nX + nWidth + nCharWidth - 3, rRect.y + 2}; //CharWidth is bit wide
 279
 280         vPntStart.x = nX + nWidth - 1;
 281         vPntStart.y = rRect.y + 2; // Make it look pretty!
 282         vPen = wxPen(vColText, 1, wxSOLID); // Assuming we are always black
 283         rDC.SetPen(vPen);
 284         ::GpiMove(hPS, &vPntStart);
 285         ::GpiLine(hPS, &vPntEnd);
 286     }
 287
 288     //
 289     // Now draw the accel text
 290     //
 291     if (bFoundAccel)
 292     {
 293         size_t                      nWidth;
 294         size_t                      nHeight;
 295
 296         rDC.GetTextExtent( sAccel
 297                           ,(long *)&nWidth
 298                           ,(long *)&nHeight
 299                          );
 300         //
 301         // Back off the starting position from the right edge
 302         //
 303         vPntStart.x = rRect.width - (nWidth + 7);
 304         vPntStart.y = rRect.y + 4;
 305         ::GpiCharStringAt( rDC.GetHPS()
 306                           ,&vPntStart
 307                           ,sAccel.length()
 308                           ,(PCH)sAccel.c_str()
 309                          );
 310     }
 311
 312     //
 313     // Draw the bitmap
 314     // ---------------
 315     //
 316     if (IsCheckable() && !m_bmpChecked.Ok())
 317     {
 318         if (eStatus & wxODChecked)
 319         {
 320             RECTL                   vRect;
 321             HBITMAP                 hBmpCheck = ::WinGetSysBitmap(HWND_DESKTOP, SBMP_MENUCHECK);
 322
 323             vRect.xLeft   = rRect.x;
 324             vRect.xRight  = rRect.x + GetMarginWidth();
 325             vRect.yBottom = rRect.y;
 326             vRect.yTop    = rRect.y + m_nHeight - 3;
 327
 328             ::WinDrawBitmap( hPS             // PS for this menuitem
 329                             ,hBmpCheck       // system checkmark
 330                             ,NULL            // draw the whole bitmap
 331                             ,(PPOINTL)&vRect // destination -- bottom left corner of the menuitem area
 332                             ,0L              // ignored
 333                             ,0L              // draw a bitmap
 334                             ,DBM_NORMAL      // draw normal size
 335                            );
 336         }
 337     }
 338     else
 339     {
 340         //
 341         // For uncheckable item we use only the 'checked' bitmap
 342         //
 343         wxBitmap                    vBmp(GetBitmap(IsCheckable() ? ((eStatus & wxODChecked) != 0) : TRUE));
 344
 345         if (vBmp.Ok())
 346         {
 347
 348             wxMemoryDC              vDCMem(&rDC);
 349             wxMemoryDC*             pOldDC = (wxMemoryDC*)vBmp.GetSelectedInto();
 350
 351             if(pOldDC != NULL)
 352             {
 353                 vBmp.SetSelectedInto(NULL);
 354             }
 355             vDCMem.SelectObject(vBmp);
 356
 357             //
 358             // Center bitmap
 359             //
 360             int                     nBmpWidth = vBmp.GetWidth();
 361             int                     nBmpHeight = vBmp.GetHeight();
 362
 363             //
 364             // There should be enough space!
 365             //
 366             wxASSERT((nBmpWidth <= rRect.width) && (nBmpHeight <= rRect.height));
 367
 368             int                     nHeightDiff = m_nHeight - nBmpHeight;
 369
 370             rDC.Blit( rRect.x + (GetMarginWidth() - nBmpWidth) / 2
 371                      ,rRect.y + nHeightDiff / 2
 372                      ,nBmpWidth
 373                      ,nBmpHeight
 374                      ,&vDCMem
 375                      ,0
 376                      ,0
 377                      ,wxCOPY
 378                      ,TRUE
 379                     );
 380
 381             if (eStatus & wxODSelected)
 382             {
 383                 RECT                vRectBmp = { rRect.x
 384                                                 ,rRect.y
 385                                                 ,rRect.x + GetMarginWidth() - 1
 386                                                 ,rRect.y + m_nHeight - 1
 387                                                };
 388                 POINTL              vPnt1 = {rRect.x + 1, rRect.y + 3}; // Leave a little background border
 389                 POINTL              vPnt2 = {rRect.x + GetMarginWidth(), rRect.y + m_nHeight - 3};
 390
 391                 LINEBUNDLE          vLine;
 392
 393                 vLine.lColor = vColBack.GetPixel();
 394                 ::GpiSetAttrs( hPS
 395                               ,PRIM_LINE
 396                               ,LBB_COLOR
 397                               ,0
 398                               ,&vLine
 399                              );
 400                 ::GpiMove(hPS, &vPnt1);
 401                 ::GpiBox( hPS
 402                          ,DRO_OUTLINE
 403                          ,&vPnt2
 404                          ,0L
 405                          ,0L
 406                         );
 407             }
 408             vBmp.SetSelectedInto(NULL);
 409         }
 410     }
 411     return TRUE;
 412 } // end of wxOwnerDrawn::OnDrawItem
 413
 414 #endif //wxUSE_OWNER_DRAWN