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 licence
  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/settings.h"
  32 #include "wx/ownerdrw.h"
  33 #include "wx/menuitem.h"
  34
  35
  36 // ============================================================================
  37 // implementation of wxOwnerDrawn class
  38 // ============================================================================
  39
  40 //
  41 // ctor
  42 // ----
  43 //
  44 wxOwnerDrawn::wxOwnerDrawn(
  45   const wxString&                   rsStr
  46 , bool                              bCheckable
  47 , bool                              bMenuItem
  48 )
  49 : m_strName(rsStr)
  50 {
  51     m_bCheckable   = bCheckable;
  52     m_bOwnerDrawn  = FALSE;
  53     m_nHeight      = 0;
  54     m_nMarginWidth = ms_nLastMarginWidth;
  55     if (wxNORMAL_FONT)
  56         m_font = *wxNORMAL_FONT;
  57 } // end of wxOwnerDrawn::wxOwnerDrawn
  58
  59 size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 15;
  60
  61 size_t wxOwnerDrawn::ms_nLastMarginWidth = ms_nDefaultMarginWidth;
  62
  63 //
  64 // Drawing
  65 // -------
  66 //
  67
  68 bool wxOwnerDrawn::OnMeasureItem(
  69   size_t*                           pWidth
  70 , size_t*                           pHeight
  71 )
  72 {
  73     wxMemoryDC                      vDC;
  74
  75
  76     wxString                        sStr = wxStripMenuCodes(m_strName);
  77
  78     //
  79     // If we have a valid accel string, then pad out
  80     // the menu string so that the menu and accel string are not
  81     // placed on top of each other.
  82     if (!m_strAccel.empty() )
  83     {
  84         sStr.Pad(sStr.Length()%8);
  85         sStr += m_strAccel;
  86     }
  87     vDC.SetFont(GetFont());
  88     vDC.GetTextExtent( sStr
  89                       ,(long *)pWidth
  90                       ,(long *)pHeight
  91                      );
  92     if (!m_strAccel.IsEmpty())
  93     {
  94         //
  95         // Measure the accelerator string, and add its width to
  96         // the total item width, plus 16 (Accelerators are right justified,
  97         // with the right edge of the text rectangle 16 pixels left of
  98         // the right edge of the menu)
  99         //
 100         int                         nAccelWidth;
 101         int                         nAccelHeight;
 102
 103         vDC.GetTextExtent( m_strAccel
 104                           ,&nAccelWidth
 105                           ,&nAccelHeight
 106                          );
 107         *pWidth += nAccelWidth;
 108     }
 109
 110     //
 111     // Add space at the end of the menu for the submenu expansion arrow.
 112     // This will also allow offsetting the accel string from the right edge
 113     //
 114     *pWidth = (size_t)(*pWidth + GetDefaultMarginWidth() * 1.5);
 115
 116     //
 117     // JACS: items still look too tightly packed, so adding 5 pixels.
 118     //
 119     (*pHeight) += 5;
 120
 121     //
 122     // Ray Gilbert's changes - Corrects the problem of a BMP
 123     // being placed next to text in a menu item, and the BMP does
 124     // not match the size expected by the system.  This will
 125     // resize the space so the BMP will fit.  Without this, BMPs
 126     // must be no larger or smaller than 16x16.
 127     //
 128     if (m_bmpChecked.Ok())
 129     {
 130         //
 131         // Is BMP height larger then text height?
 132         //
 133         size_t                      nAdjustedHeight = m_bmpChecked.GetHeight() +
 134                                                       wxSystemSettings::GetMetric(wxSYS_EDGE_Y);
 135         if (*pHeight < nAdjustedHeight)
 136             *pHeight = nAdjustedHeight;
 137
 138         //
 139         // Does BMP encroach on default check menu position?
 140         //
 141         size_t                      nAdjustedWidth = m_bmpChecked.GetWidth() +
 142                                                      (wxSystemSettings::GetMetric(wxSYS_EDGE_X) * 2);
 143
 144         //
 145         // Do we need to widen margin to fit BMP?
 146         //
 147         if ((size_t)GetMarginWidth() < nAdjustedWidth)
 148             SetMarginWidth(nAdjustedWidth);
 149
 150         //
 151         // Add the size of the bitmap to our total size...
 152         //
 153         *pWidth += GetMarginWidth();
 154     }
 155
 156     //
 157     // Add the size of the bitmap to our total size - even if we don't have
 158     // a bitmap we leave room for one...
 159     //
 160     *pWidth += GetMarginWidth();
 161
 162     //
 163     // Make sure that this item is at least as
 164     // tall as the user's system settings specify
 165     //
 166     if (*pHeight < m_nMinHeight)
 167         *pHeight = m_nMinHeight;
 168     m_nHeight = *pHeight;                // remember height for use in OnDrawItem
 169     return TRUE;
 170 } // end of wxOwnerDrawn::OnMeasureItem
 171
 172 // draw the item
 173 bool wxOwnerDrawn::OnDrawItem(
 174   wxDC&                             rDC
 175 , const wxRect&                     rRect
 176 , wxODAction                        eAction
 177 , wxODStatus                        eStatus
 178 )
 179 {
 180     //
 181     // We do nothing on focus change
 182     //
 183     if (eAction == wxODFocusChanged )
 184         return TRUE;
 185
 186     //
 187     // Select the font and draw the text
 188     // ---------------------------------
 189     //
 190
 191     CHARBUNDLE                      vCbnd;
 192     HPS                             hPS= rDC.GetHPS();
 193     wxColour                        vColBack;
 194     wxColour                        vColText;
 195     COLORREF                        vRef;
 196     RECTL                           vRect = {rRect.x + 4, rRect.y + 1, rRect.x + (rRect.width - 2), rRect.y + rRect.height};
 197
 198     memset(&vCbnd, 0, sizeof(CHARBUNDLE));
 199
 200     //
 201     // Use default font if no font set
 202     //
 203     if (m_font.Ok())
 204     {
 205         m_font.RealizeResource();
 206     }
 207     else
 208     {
 209         ::GpiSetCharSet(hPS, LCID_DEFAULT);
 210     }
 211
 212     //
 213     // Based on the status of the menu item, pick the right colors
 214     //
 215     if (eStatus & wxODSelected)
 216     {
 217         wxColour                        vCol2(wxT("WHITE"));
 218         vColBack.Set( (unsigned char)0
 219                      ,(unsigned char)0
 220                      ,(unsigned char)160
 221                     ); // no dark blue in color table
 222         vColText = vCol2;
 223     }
 224     else if (eStatus & wxODDisabled)
 225     {
 226         vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
 227                                          ,SYSCLR_MENU // Light gray
 228                                          ,0L
 229                                         );
 230         vColBack.Set( GetRValue(vRef)
 231                      ,GetGValue(vRef)
 232                      ,GetBValue(vRef)
 233                     );
 234         vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
 235                                          ,SYSCLR_MENUDISABLEDTEXT // dark gray
 236                                          ,0L
 237                                         );
 238         vColText.Set( GetRValue(vRef)
 239                      ,GetGValue(vRef)
 240                      ,GetBValue(vRef)
 241                     );
 242     }
 243     else
 244     {
 245         //
 246         // Fall back to default colors if none explicitly specified
 247         //
 248         vRef = ::WinQuerySysColor( HWND_DESKTOP
 249                                   ,SYSCLR_MENU  // we are using gray for all our window backgrounds in wxWidgets
 250                                   ,0L
 251                                  );
 252         vColBack.Set( GetRValue(vRef)
 253                      ,GetGValue(vRef)
 254                      ,GetBValue(vRef)
 255                     );
 256         vRef = ::WinQuerySysColor( HWND_DESKTOP
 257                                   ,SYSCLR_WINDOWTEXT // Black
 258                                   ,0L
 259                                  );
 260         vColText.Set( GetRValue(vRef)
 261                      ,GetGValue(vRef)
 262                      ,GetBValue(vRef)
 263                     );
 264     }
 265
 266     rDC.SetTextBackground(vColBack);
 267     rDC.SetTextForeground(vColText);
 268     rDC.SetBackgroundMode(wxTRANSPARENT);
 269     vCbnd.lColor     = vColText.GetPixel();
 270     vCbnd.lBackColor = vColBack.GetPixel();
 271     ::GpiSetAttrs( hPS
 272                   ,PRIM_CHAR
 273                   ,CBB_BACK_COLOR | CBB_COLOR
 274                   ,0
 275                   ,&vCbnd
 276                  );
 277     ::GpiSetBackMix( hPS
 278                     ,BM_LEAVEALONE
 279                    );
 280
 281     //
 282     // Paint the background
 283     //
 284     ::WinFillRect(hPS, &vRect, vColBack.GetPixel());
 285
 286     //
 287     // Determine where to draw and leave space for a check-mark.
 288     //
 289     int                             nX = rRect.x + GetMarginWidth();
 290
 291     //
 292     // Unfortunately, unlike Win32, PM has no owner drawn specific text
 293     // drawing methods like ::DrawState that can cleanly handle accel
 294     // mnemonics and deal, automatically, with various states, so we have
 295     // to handle them ourselves. Notice Win32 can't handle \t in ownerdrawn
 296     // strings either.  We cannot handle mnemonics either.  We display
 297     // them, though, in the hope we can figure them out some day.
 298     //
 299
 300     //
 301     // Display main text and accel text separately to align better
 302     //
 303     wxString                        sTgt = wxT("\t");
 304     wxString                        sFullString = m_strName; // need to save the original text
 305     wxString                        sAccel;
 306     int                             nIndex;
 307     size_t                          nWidth;
 308     size_t                          nCharWidth;
 309     size_t                          nHeight;
 310     bool                            bFoundMnemonic = FALSE;
 311     bool                            bFoundAccel = FALSE;
 312
 313     //
 314     // Deal with the tab, extracting the Accel text
 315     //
 316     nIndex = sFullString.Find(sTgt.c_str());
 317     if (nIndex != -1)
 318     {
 319         bFoundAccel = TRUE;
 320         sAccel = sFullString.Mid(nIndex + 1);
 321         sFullString.Remove(nIndex);
 322     }
 323
 324     //
 325     // Deal with the mnemonic character
 326     //
 327     sTgt = wxT("~");
 328     nIndex = sFullString.Find(sTgt.c_str());
 329     if (nIndex != -1)
 330     {
 331         wxString                    sTmp = sFullString;
 332
 333         bFoundMnemonic = TRUE;
 334         sTmp.Remove(nIndex);
 335         rDC.GetTextExtent( sTmp
 336                           ,(long *)&nWidth
 337                           ,(long *)&nHeight
 338                          );
 339         sTmp = sFullString[(size_t)(nIndex + 1)];
 340         rDC.GetTextExtent( sTmp
 341                           ,(long *)&nCharWidth
 342                           ,(long *)&nHeight
 343                          );
 344         sFullString.Replace(sTgt.c_str(), wxEmptyString, TRUE);
 345     }
 346
 347     //
 348     // Draw the main item text sans the accel text
 349     //
 350     POINTL                      vPntStart = {nX, rRect.y + 4};
 351     ::GpiCharStringAt( rDC.GetHPS()
 352                       ,&vPntStart
 353                       ,sFullString.length()
 354                       ,(PCH)sFullString.c_str()
 355                      );
 356     if (bFoundMnemonic)
 357     {
 358         //
 359         // Underline the mnemonic -- still won't work, but at least it "looks" right
 360         //
 361         wxPen                       vPen;
 362         POINTL                      vPntEnd = {nX + nWidth + nCharWidth - 3, rRect.y + 2}; //CharWidth is bit wide
 363
 364         vPntStart.x = nX + nWidth - 1;
 365         vPntStart.y = rRect.y + 2; // Make it look pretty!
 366         vPen = wxPen(vColText, 1, wxSOLID); // Assuming we are always black
 367         rDC.SetPen(vPen);
 368         ::GpiMove(hPS, &vPntStart);
 369         ::GpiLine(hPS, &vPntEnd);
 370     }
 371
 372     //
 373     // Now draw the accel text
 374     //
 375     if (bFoundAccel)
 376     {
 377         size_t                      nWidth;
 378         size_t                      nHeight;
 379
 380         rDC.GetTextExtent( sAccel
 381                           ,(long *)&nWidth
 382                           ,(long *)&nHeight
 383                          );
 384         //
 385         // Back off the starting position from the right edge
 386         //
 387         vPntStart.x = rRect.width - (nWidth + 7);
 388         vPntStart.y = rRect.y + 4;
 389         ::GpiCharStringAt( rDC.GetHPS()
 390                           ,&vPntStart
 391                           ,sAccel.length()
 392                           ,(PCH)sAccel.c_str()
 393                          );
 394     }
 395
 396     //
 397     // Draw the bitmap
 398     // ---------------
 399     //
 400     if (IsCheckable() && !m_bmpChecked.Ok())
 401     {
 402         if (eStatus & wxODChecked)
 403         {
 404             RECTL                   vRect;
 405             HBITMAP                 hBmpCheck = ::WinGetSysBitmap(HWND_DESKTOP, SBMP_MENUCHECK);
 406
 407             vRect.xLeft   = rRect.x;
 408             vRect.xRight  = rRect.x + GetMarginWidth();
 409             vRect.yBottom = rRect.y;
 410             vRect.yTop    = rRect.y + m_nHeight - 3;
 411
 412             ::WinDrawBitmap( hPS             // PS for this menuitem
 413                             ,hBmpCheck       // system checkmark
 414                             ,NULL            // draw the whole bitmap
 415                             ,(PPOINTL)&vRect // destination -- bottom left corner of the menuitem area
 416                             ,0L              // ignored
 417                             ,0L              // draw a bitmap
 418                             ,DBM_NORMAL      // draw normal size
 419                            );
 420         }
 421     }
 422     else
 423     {
 424         //
 425         // For uncheckable item we use only the 'checked' bitmap
 426         //
 427         wxBitmap                    vBmp(GetBitmap(IsCheckable() ? ((eStatus & wxODChecked) != 0) : TRUE));
 428
 429         if (vBmp.Ok())
 430         {
 431
 432             wxMemoryDC              vDCMem(&rDC);
 433             wxMemoryDC*             pOldDC = (wxMemoryDC*)vBmp.GetSelectedInto();
 434
 435             if(pOldDC != NULL)
 436             {
 437                 vBmp.SetSelectedInto(NULL);
 438             }
 439             vDCMem.SelectObject(vBmp);
 440
 441             //
 442             // Center bitmap
 443             //
 444             int                     nBmpWidth = vBmp.GetWidth();
 445             int                     nBmpHeight = vBmp.GetHeight();
 446
 447             //
 448             // There should be enough space!
 449             //
 450             wxASSERT((nBmpWidth <= rRect.width) && (nBmpHeight <= rRect.height));
 451
 452             int                     nHeightDiff = m_nHeight - nBmpHeight;
 453
 454             rDC.Blit( rRect.x + (GetMarginWidth() - nBmpWidth) / 2
 455                      ,rRect.y + nHeightDiff / 2
 456                      ,nBmpWidth
 457                      ,nBmpHeight
 458                      ,&vDCMem
 459                      ,0
 460                      ,0
 461                      ,wxCOPY
 462                      ,TRUE
 463                     );
 464
 465             if (eStatus & wxODSelected)
 466             {
 467                 POINTL              vPnt1 = {rRect.x + 1, rRect.y + 3}; // Leave a little background border
 468                 POINTL              vPnt2 = {rRect.x + GetMarginWidth(), rRect.y + m_nHeight - 3};
 469
 470                 LINEBUNDLE          vLine;
 471
 472                 vLine.lColor = vColBack.GetPixel();
 473                 ::GpiSetAttrs( hPS
 474                               ,PRIM_LINE
 475                               ,LBB_COLOR
 476                               ,0
 477                               ,&vLine
 478                              );
 479                 ::GpiMove(hPS, &vPnt1);
 480                 ::GpiBox( hPS
 481                          ,DRO_OUTLINE
 482                          ,&vPnt2
 483                          ,0L
 484                          ,0L
 485                         );
 486             }
 487             vBmp.SetSelectedInto(NULL);
 488         }
 489     }
 490     return TRUE;
 491 } // end of wxOwnerDrawn::OnDrawItem
 492
 493 #endif //wxUSE_OWNER_DRAWN