- wxBitmap* bitmap = &m_buttonBitmap;
-
- UINT state = lpDIS->itemState;
- if ((state & ODS_SELECTED) && m_buttonBitmapSelected.Ok())
- bitmap = &m_buttonBitmapSelected;
- else if ((state & ODS_FOCUS) && m_buttonBitmapFocus.Ok())
- bitmap = &m_buttonBitmapFocus;
- else if ((state & ODS_DISABLED) && m_buttonBitmapDisabled.Ok())
- bitmap = &m_buttonBitmapDisabled;
-
- if ( !bitmap->Ok() )
- return FALSE;
-
- HDC hDC = lpDIS->hDC;
- HDC memDC = ::CreateCompatibleDC(hDC);
-
- HBITMAP old = ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
-
- if (!old)
- return FALSE;
-
- RECT rect = lpDIS->rcItem;
-
- int x = lpDIS->rcItem.left;
- int y = lpDIS->rcItem.top;
- int width = lpDIS->rcItem.right - x;
- int height = lpDIS->rcItem.bottom - y;
-
- // Draw the face, if auto-drawing
- if ( GetWindowStyleFlag() & wxBU_AUTODRAW )
- DrawFace((WXHDC) hDC, lpDIS->rcItem.left, lpDIS->rcItem.top, lpDIS->rcItem.right, lpDIS->rcItem.bottom,
- ((state & ODS_SELECTED) == ODS_SELECTED));
-
- // Centre the bitmap in the control area
- int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
- int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
-
- if ( (state & ODS_SELECTED) && (GetWindowStyleFlag() & wxBU_AUTODRAW) )
- {
- x1 ++;
- y1 ++;
- }
-
- ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
-
- if ( (state & ODS_DISABLED) && (GetWindowStyleFlag() & wxBU_AUTODRAW) )
- DrawButtonDisable( (WXHDC) hDC, lpDIS->rcItem.left, lpDIS->rcItem.top, lpDIS->rcItem.right, lpDIS->rcItem.bottom, TRUE ) ;
- else if ( (state & ODS_FOCUS) && (GetWindowStyleFlag() & wxBU_AUTODRAW) )
- DrawButtonFocus( (WXHDC) hDC, lpDIS->rcItem.left, lpDIS->rcItem.top, lpDIS->rcItem.right, lpDIS->rcItem.bottom, ((state & ODS_SELECTED) == ODS_SELECTED));
-
- ::SelectObject(memDC, old);
+ // choose the bitmap to use depending on the buttons state
+ wxBitmap* bitmap;
+
+ UINT state = lpDIS->itemState;
+ bool isSelected = (state & ODS_SELECTED) != 0;
+ if ( isSelected && m_buttonBitmapSelected.Ok() )
+ bitmap = &m_buttonBitmapSelected;
+ else if ((state & ODS_FOCUS) && m_buttonBitmapFocus.Ok())
+ bitmap = &m_buttonBitmapFocus;
+ else if ((state & ODS_DISABLED) && m_buttonBitmapDisabled.Ok())
+ bitmap = &m_buttonBitmapDisabled;
+ else
+ bitmap = &m_buttonBitmap;
+
+ if ( !bitmap->Ok() )
+ return FALSE;
+
+ // draw it on the memory DC
+ HDC hDC = lpDIS->hDC;
+ HDC memDC = ::CreateCompatibleDC(hDC);
+
+ HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
+
+ if (!old)
+ {
+ wxLogLastError(_T("SelectObject"));
+
+ return FALSE;
+ }
+
+ int x = lpDIS->rcItem.left;
+ int y = lpDIS->rcItem.top;
+ int width = lpDIS->rcItem.right - x;
+ int height = lpDIS->rcItem.bottom - y;
+
+ int wBmp = bitmap->GetWidth(),
+ hBmp = bitmap->GetHeight();
+
+ // Draw the face, if auto-drawing
+ bool autoDraw = (GetWindowStyleFlag() & wxBU_AUTODRAW) != 0;
+ if ( autoDraw )
+ {
+ DrawFace((WXHDC) hDC,
+ lpDIS->rcItem.left, lpDIS->rcItem.top,
+ lpDIS->rcItem.right, lpDIS->rcItem.bottom,
+ isSelected);
+ }
+
+ // Centre the bitmap in the control area
+ int x1 = x + (width - wBmp) / 2;
+ int y1 = y + (height - hBmp) / 2;
+
+ if ( isSelected && autoDraw )
+ {
+ x1++;
+ y1++;
+ }
+
+ BOOL ok;
+
+ // no MaskBlt() under Win16
+#ifdef __WIN32__
+ wxMask *mask = bitmap->GetMask();
+ if ( mask )
+ {
+ // the fg ROP is applied for the pixels of the mask bitmap which are 1
+ // (for a wxMask this means that this is a non transparent pixel), the
+ // bg ROP is applied for all the others
+
+ HBRUSH hbrBackground =
+ ::CreateSolidBrush(wxColourToRGB(GetBackgroundColour()));
+ HBRUSH hbrOld = (HBRUSH)::SelectObject(hDC, hbrBackground);
+
+ ok = ::MaskBlt(
+ hDC, x1, y1, wBmp, hBmp, // dst
+ memDC, 0, 0, // src
+ (HBITMAP)mask->GetMaskBitmap(), 0, 0, // mask
+ MAKEROP4(SRCCOPY, // fg ROP
+ PATCOPY) // bg ROP
+ );
+
+ ::SelectObject(hDC, hbrOld);
+ ::DeleteObject(hbrBackground);
+ }
+ else
+ {
+ // this will make the check below fail and BitBlt() will be used if
+ // MaskBlt() is not supported (for example, under Win95)
+ ok = FALSE;
+ }
+
+ if ( !ok )
+#endif // Win32
+ {
+ ok = ::BitBlt(hDC, x1, y1, wBmp, hBmp, // dst
+ memDC, 0, 0, // src
+ SRCCOPY); // ROP
+ }
+
+ if ( !ok )
+ {
+ wxLogLastError(_T("Mask/BitBlt()"));
+ }
+
+ if ( (state & ODS_DISABLED) && autoDraw )
+ {
+ DrawButtonDisable((WXHDC) hDC,
+ lpDIS->rcItem.left, lpDIS->rcItem.top,
+ lpDIS->rcItem.right, lpDIS->rcItem.bottom,
+ TRUE);
+ }
+ else if ( (state & ODS_FOCUS) && autoDraw )
+ {
+ DrawButtonFocus((WXHDC) hDC,
+ lpDIS->rcItem.left,
+ lpDIS->rcItem.top,
+ lpDIS->rcItem.right,
+ lpDIS->rcItem.bottom,
+ isSelected);
+ }
+
+ ::SelectObject(memDC, old);