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/os2/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
  75     wxString                        sStr = wxStripMenuCodes(m_strName);
  76
  77     //
  78     // If we have a valid accel string, then pad out
  79     // the menu string so the menu and accel string are not
  80     // placed ontop of eachother.
  81     if (!m_strAccel.empty() )
  82     {
  83         sStr.Pad(sStr.Length()%8);
  84         sStr += m_strAccel;
  85     }
  86     vDC.SetFont(GetFont());
  87     vDC.GetTextExtent( sStr
  88                       ,(long *)pWidth
  89                       ,(long *)pHeight
  90                      );
  91     if (!m_strAccel.IsEmpty())
  92     {
  93         //
  94         // Measure the accelerator string, and add it's width to
  95         // the total item width, plus 16 (Accelerators are right justified,
  96         // with the right edge of the text rectangle 16 pixels left of
  97         // the right edge of the menu)
  98         //
  99         int                         nAccelWidth;
 100         int                         nAccelHeight;
 101
 102         vDC.GetTextExtent( m_strAccel
 103                           ,&nAccelWidth
 104                           ,&nAccelHeight
 105                          );
 106         *pWidth += nAccelWidth;
 107     }
 108
 109     //
 110     // Add space at the end of the menu for the submenu expansion arrow
 111     // this will also allow offsetting the accel string from the right edge
 112     //
 113     *pWidth += GetDefaultMarginWidth() * 1.5;
 114
 115     //
 116     // JACS: items still look too tightly packed, so adding 5 pixels.
 117     //
 118     (*pHeight) += 5;
 119
 120     //
 121     // Ray Gilbert's changes - Corrects the problem of a BMP
 122     // being placed next to text in a menu item, and the BMP does
 123     // not match the size expected by the system.  This will
 124     // resize the space so the BMP will fit.  Without this, BMPs
 125     // must be no larger or smaller than 16x16.
 126     //
 127     if (m_bmpChecked.Ok())
 128     {
 129         //
 130         // Is BMP height larger then text height?
 131         //
 132         size_t                      nAdjustedHeight = m_bmpChecked.GetHeight() +
 133                                                       wxSystemSettings::GetMetric(wxSYS_EDGE_Y);
 134         if (*pHeight < nAdjustedHeight)
 135             *pHeight = nAdjustedHeight;
 136
 137         //
 138         // Does BMP encroach on default check menu position?
 139         //
 140         size_t                      nAdjustedWidth = m_bmpChecked.GetWidth() +
 141                                                      (wxSystemSettings::GetMetric(wxSYS_EDGE_X) * 2);
 142
 143         //
 144         // Do we need to widen margin to fit BMP?
 145         //
 146         if ((size_t)GetMarginWidth() < nAdjustedWidth)
 147             SetMarginWidth(nAdjustedWidth);
 148
 149         //
 150         // Add the size of the bitmap to our total size...
 151         //
 152         *pWidth += GetMarginWidth();
 153     }
 154
 155     //
 156     // Add the size of the bitmap to our total size - even if we don't have
 157     // a bitmap we leave room for one...
 158     //
 159     *pWidth += GetMarginWidth();
 160
 161     //
 162     // Make sure that this item is at least as
 163     // tall as the user's system settings specify
 164     //
 165     if (*pHeight < m_nMinHeight)
 166         *pHeight = m_nMinHeight;
 167     m_nHeight = *pHeight;                // remember height for use in OnDrawItem
 168     return TRUE;
 169 } // end of wxOwnerDrawn::OnMeasureItem
 170
 171 // draw the item
 172 bool wxOwnerDrawn::OnDrawItem(
 173   wxDC&                             rDC
 174 , const wxRect&                     rRect
 175 , wxODAction                        eAction
 176 , wxODStatus                        eStatus
 177 )
 178 {
 179     //
 180     // We do nothing on focus change
 181     //
 182     if (eAction == wxODFocusChanged )
 183         return TRUE;
 184
 185     //
 186     // Select the font and draw the text
 187     // ---------------------------------
 188     //
 189
 190     CHARBUNDLE                      vCbnd;
 191     HPS                             hPS= rDC.GetHPS();
 192     wxColour                        vColBack;
 193     wxColour                        vColText;
 194     COLORREF                        vRef;
 195     RECTL                           vRect = {rRect.x + 4, rRect.y + 1, rRect.x + (rRect.width - 2), rRect.y + rRect.height};
 196
 197     memset(&vCbnd, 0, sizeof(CHARBUNDLE));
 198
 199     //
 200     // Use default font if no font set
 201     //
 202     if (m_font.Ok())
 203     {
 204         m_font.RealizeResource();
 205     }
 206     else
 207     {
 208         ::GpiSetCharSet(hPS, LCID_DEFAULT);
 209     }
 210
 211     //
 212     // Base on the status of the menu item pick the right colors
 213     //
 214     if (eStatus & wxODSelected)
 215     {
 216         wxColour                        vCol2("WHITE");
 217         vColBack.Set( (unsigned char)0
 218                      ,(unsigned char)0
 219                      ,(unsigned char)160
 220                     ); // no dark blue in color table
 221         vColText = vCol2;
 222     }
 223     else if (eStatus & wxODDisabled)
 224     {
 225         vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
 226                                          ,SYSCLR_MENU // Light gray
 227                                          ,0L
 228                                         );
 229         vColBack.Set( GetRValue(vRef)
 230                      ,GetGValue(vRef)
 231                      ,GetBValue(vRef)
 232                     );
 233         vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
 234                                          ,SYSCLR_MENUDISABLEDTEXT // dark gray
 235                                          ,0L
 236                                         );
 237         vColText.Set( GetRValue(vRef)
 238                      ,GetGValue(vRef)
 239                      ,GetBValue(vRef)
 240                     );
 241     }
 242     else
 243     {
 244         //
 245         // Fall back to default colors if none explicitly specified
 246         //
 247         vRef = ::WinQuerySysColor( HWND_DESKTOP
 248                                   ,SYSCLR_MENU  // we are using gray for all our window backgrounds in wxWindows
 249                                   ,0L
 250                                  );
 251         vColBack.Set( GetRValue(vRef)
 252                      ,GetGValue(vRef)
 253                      ,GetBValue(vRef)
 254                     );
 255         vRef = ::WinQuerySysColor( HWND_DESKTOP
 256                                   ,SYSCLR_WINDOWTEXT // Black
 257                                   ,0L
 258                                  );
 259         vColText.Set( GetRValue(vRef)
 260                      ,GetGValue(vRef)
 261                      ,GetBValue(vRef)
 262                     );
 263     }
 264
 265     rDC.SetTextBackground(vColBack);
 266     rDC.SetTextForeground(vColText);
 267     rDC.SetBackgroundMode(wxTRANSPARENT);
 268     vCbnd.lColor     = vColText.GetPixel();
 269     vCbnd.lBackColor = vColBack.GetPixel();
 270     ::GpiSetAttrs( hPS
 271                   ,PRIM_CHAR
 272                   ,CBB_BACK_COLOR | CBB_COLOR
 273                   ,0
 274                   ,&vCbnd
 275                  );
 276     ::GpiSetBackMix( hPS
 277                     ,BM_LEAVEALONE
 278                    );
 279
 280     //
 281     // Paint the background
 282     //
 283     ::WinFillRect(hPS, &vRect, vColBack.GetPixel());
 284
 285     //
 286     // Determine where to draw and leave space for a check-mark.
 287     //
 288     int                             nX = rRect.x + GetMarginWidth();
 289
 290     //
 291     // Unfortunately, unlike Win32, PM has no owner drawn specific text
 292     // drawing methods like ::DrawState that can cleanly handle accel
 293     // pneumonics and deal, automatically, with various states, so we have
 294     // to handle them ourselves. Notice Win32 can't handle \t in ownerdrawn
 295     // strings either.  We cannot handle mneumonics either.  We display
 296     // it, though, in hopes we can figure it out some day.
 297     //
 298
 299     //
 300     // Display main text and accel text separately to allign better
 301     //
 302     wxString                        sTgt = "\t";
 303     wxString                        sFullString = m_strName; // need to save the original text
 304     wxString                        sAccel;
 305     size_t                          nIndex;
 306     size_t                          nWidth;
 307     size_t                          nCharWidth;
 308     size_t                          nHeight;
 309     bool                            bFoundMneumonic = FALSE;
 310     bool                            bFoundAccel = FALSE;
 311
 312     //
 313     // Deal with the tab, extracting the Accel text
 314     //
 315     nIndex = sFullString.Find(sTgt.c_str());
 316     if (nIndex != -1)
 317     {
 318         bFoundAccel = TRUE;
 319         sAccel = sFullString.Mid(nIndex + 1);
 320         sFullString.Remove(nIndex);
 321     }
 322
 323     //
 324     // Deal with the mneumonic character
 325     //
 326     sTgt = "~";
 327     nIndex = sFullString.Find(sTgt.c_str());
 328     if (nIndex != -1)
 329     {
 330         wxString                    sTmp = sFullString;
 331
 332         bFoundMneumonic = TRUE;
 333         sTmp.Remove(nIndex);
 334         rDC.GetTextExtent( sTmp
 335                           ,(long *)&nWidth
 336                           ,(long *)&nHeight
 337                          );
 338         sTmp = sFullString[nIndex + 1];
 339         rDC.GetTextExtent( sTmp
 340                           ,(long *)&nCharWidth
 341                           ,(long *)&nHeight
 342                          );
 343         sFullString.Replace(sTgt.c_str(), "", TRUE);
 344     }
 345
 346     //
 347     // Draw the main item text sans the accel text
 348     //
 349     POINTL                      vPntStart = {nX, rRect.y + 4};
 350     ::GpiCharStringAt( rDC.GetHPS()
 351                       ,&vPntStart
 352                       ,sFullString.length()
 353                       ,(PCH)sFullString.c_str()
 354                      );
 355     if (bFoundMneumonic)
 356     {
 357         //
 358         // Underline the mneumonic -- still won't work, but at least it "looks" right
 359         //
 360         wxPen                       vPen;
 361         POINTL                      vPntEnd = {nX + nWidth + nCharWidth - 3, rRect.y + 2}; //CharWidth is bit wide
 362
 363         vPntStart.x = nX + nWidth - 1;
 364         vPntStart.y = rRect.y + 2; // Make it look pretty!
 365         vPen = wxPen(vColText, 1, wxSOLID); // Assuming we are always black
 366         rDC.SetPen(vPen);
 367         ::GpiMove(hPS, &vPntStart);
 368         ::GpiLine(hPS, &vPntEnd);
 369     }
 370
 371     //
 372     // Now draw the accel text
 373     //
 374     if (bFoundAccel)
 375     {
 376         size_t                      nWidth;
 377         size_t                      nHeight;
 378
 379         rDC.GetTextExtent( sAccel
 380                           ,(long *)&nWidth
 381                           ,(long *)&nHeight
 382                          );
 383         //
 384         // Back off the starting position from the right edge
 385         //
 386         vPntStart.x = rRect.width - (nWidth + 7);
 387         vPntStart.y = rRect.y + 4;
 388         ::GpiCharStringAt( rDC.GetHPS()
 389                           ,&vPntStart
 390                           ,sAccel.length()
 391                           ,(PCH)sAccel.c_str()
 392                          );
 393     }
 394
 395     //
 396     // Draw the bitmap
 397     // ---------------
 398     //
 399     if (IsCheckable() && !m_bmpChecked.Ok())
 400     {
 401         if (eStatus & wxODChecked)
 402         {
 403             RECTL                   vRect;
 404             HBITMAP                 hBmpCheck = ::WinGetSysBitmap(HWND_DESKTOP, SBMP_MENUCHECK);
 405
 406             vRect.xLeft   = rRect.x;
 407             vRect.xRight  = rRect.x + GetMarginWidth();
 408             vRect.yBottom = rRect.y;
 409             vRect.yTop    = rRect.y + m_nHeight - 3;
 410
 411             ::WinDrawBitmap( hPS             // PS for this menuitem
 412                             ,hBmpCheck       // system checkmark
 413                             ,NULL            // draw the whole bitmap
 414                             ,(PPOINTL)&vRect // destination -- bottom left corner of the menuitem area
 415                             ,0L              // ignored
 416                             ,0L              // draw a bitmap
 417                             ,DBM_NORMAL      // draw normal size
 418                            );
 419         }
 420     }
 421     else
 422     {
 423         //
 424         // For uncheckable item we use only the 'checked' bitmap
 425         //
 426         wxBitmap                    vBmp(GetBitmap(IsCheckable() ? ((eStatus & wxODChecked) != 0) : TRUE));
 427
 428         if (vBmp.Ok())
 429         {
 430
 431             wxMemoryDC              vDCMem(&rDC);
 432             wxMemoryDC*             pOldDC = (wxMemoryDC*)vBmp.GetSelectedInto();
 433
 434             if(pOldDC != NULL)
 435             {
 436                 vBmp.SetSelectedInto(NULL);
 437             }
 438             vDCMem.SelectObject(vBmp);
 439
 440             //
 441             // Center bitmap
 442             //
 443             int                     nBmpWidth = vBmp.GetWidth();
 444             int                     nBmpHeight = vBmp.GetHeight();
 445
 446             //
 447             // There should be enough space!
 448             //
 449             wxASSERT((nBmpWidth <= rRect.width) && (nBmpHeight <= rRect.height));
 450
 451             int                     nHeightDiff = m_nHeight - nBmpHeight;
 452
 453             rDC.Blit( rRect.x + (GetMarginWidth() - nBmpWidth) / 2
 454                      ,rRect.y + nHeightDiff / 2
 455                      ,nBmpWidth
 456                      ,nBmpHeight
 457                      ,&vDCMem
 458                      ,0
 459                      ,0
 460                      ,wxCOPY
 461                      ,TRUE
 462                     );
 463
 464             if (eStatus & wxODSelected)
 465             {
 466                 RECT                vRectBmp = { rRect.x
 467                                                 ,rRect.y
 468                                                 ,rRect.x + GetMarginWidth() - 1
 469                                                 ,rRect.y + m_nHeight - 1
 470                                                };
 471                 POINTL              vPnt1 = {rRect.x + 1, rRect.y + 3}; // Leave a little background border
 472                 POINTL              vPnt2 = {rRect.x + GetMarginWidth(), rRect.y + m_nHeight - 3};
 473
 474                 LINEBUNDLE          vLine;
 475
 476                 vLine.lColor = vColBack.GetPixel();
 477                 ::GpiSetAttrs( hPS
 478                               ,PRIM_LINE
 479                               ,LBB_COLOR
 480                               ,0
 481                               ,&vLine
 482                              );
 483                 ::GpiMove(hPS, &vPnt1);
 484                 ::GpiBox( hPS
 485                          ,DRO_OUTLINE
 486                          ,&vPnt2
 487                          ,0L
 488                          ,0L
 489                         );
 490             }
 491             vBmp.SetSelectedInto(NULL);
 492         }
 493     }
 494     return TRUE;
 495 } // end of wxOwnerDrawn::OnDrawItem
 496
 497 #endif //wxUSE_OWNER_DRAWN