button.c

winNT技术操作系统,国外开放的原代码和LIUX一样

        hbrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORSTATIC,
				      (WPARAM)hdc, (LPARAM)hWnd);
        if (!hbrush) /* did the app forget to call DefWindowProc ? */
            hbrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORSTATIC,
					    (WPARAM)hdc, (LPARAM)hWnd);

        GetClientRect(hWnd, &client);
        rc = client;
        BUTTON_CalcLabelRect(hWnd, hdc, &rc);
        /* Clip by client rect bounds */
        if (rc.right > client.right) rc.right = client.right;
        if (rc.bottom > client.bottom) rc.bottom = client.bottom;
        FillRect(hdc, &rc, hbrush);
        ReleaseDC(hWnd, hdc);

        if (unicode) DefWindowProcW( hWnd, WM_SETTEXT, wParam, lParam );
        else DefWindowProcA( hWnd, WM_SETTEXT, wParam, lParam );
        if (btn_type == BS_GROUPBOX) /* Yes, only for BS_GROUPBOX */
            InvalidateRect( hWnd, NULL, TRUE );
        else
            paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
        return 1; /* success. FIXME: check text length */
    }

    case WM_SETFONT:
        set_button_font( hWnd, (HFONT)wParam );
        if (lParam) paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
        break;

    case WM_GETFONT:
        return (LRESULT)get_button_font( hWnd );

    case WM_SETFOCUS:
        TRACE("WM_SETFOCUS %p\n",hWnd);
        set_button_state( hWnd, get_button_state(hWnd) | BUTTON_HASFOCUS );
        paint_button( hWnd, btn_type, ODA_FOCUS );
        if (style & BS_NOTIFY)
            BUTTON_NOTIFY_PARENT(hWnd, BN_SETFOCUS);
        break;

    case WM_KILLFOCUS:
        TRACE("WM_KILLFOCUS %p\n",hWnd);
        state = get_button_state( hWnd );
        set_button_state( hWnd, state & ~BUTTON_HASFOCUS );
	paint_button( hWnd, btn_type, ODA_FOCUS );

        if ((state & BUTTON_BTNPRESSED) && GetCapture() == hWnd)
            ReleaseCapture();
        if (style & BS_NOTIFY)
            BUTTON_NOTIFY_PARENT(hWnd, BN_KILLFOCUS);

        break;

    case WM_SYSCOLORCHANGE:
        InvalidateRect( hWnd, NULL, FALSE );
        break;

#ifndef __REACTOS__
    case BM_SETSTYLE16:
#endif
    case BM_SETSTYLE:
        if ((wParam & 0x0f) >= MAX_BTN_TYPE) break;
        btn_type = wParam & 0x0f;
        style = (style & ~0x0f) | btn_type;
        SetWindowLongW( hWnd, GWL_STYLE, style );

        /* Only redraw if lParam flag is set.*/
        if (lParam)
           paint_button( hWnd, btn_type, ODA_DRAWENTIRE );

        break;

    case BM_CLICK:
	SendMessageW( hWnd, WM_LBUTTONDOWN, 0, 0 );
	SendMessageW( hWnd, WM_LBUTTONUP, 0, 0 );
	break;

    case BM_SETIMAGE:
        /* Check that image format matches button style */
        switch (style & (BS_BITMAP|BS_ICON))
        {
        case BS_BITMAP:
            if (wParam != IMAGE_BITMAP) return 0;
            break;
        case BS_ICON:
            if (wParam != IMAGE_ICON) return 0;
            break;
        default:
            return 0;
        }
        oldHbitmap = (HBITMAP)SetWindowLongPtrW( hWnd, HIMAGE_GWL_OFFSET, lParam );
	InvalidateRect( hWnd, NULL, FALSE );
	return (LRESULT)oldHbitmap;

    case BM_GETIMAGE:
        return GetWindowLongPtrW( hWnd, HIMAGE_GWL_OFFSET );

#ifndef __REACTOS__
    case BM_GETCHECK16:
#endif
    case BM_GETCHECK:
        return get_button_state( hWnd ) & 3;

#ifndef __REACTOS__
    case BM_SETCHECK16:
#endif
    case BM_SETCHECK:
        if (wParam > maxCheckState[btn_type]) wParam = maxCheckState[btn_type];
        state = get_button_state( hWnd );
        if ((btn_type == BS_RADIOBUTTON) || (btn_type == BS_AUTORADIOBUTTON))
        {
            if (wParam) style |= WS_TABSTOP;
            else style &= ~WS_TABSTOP;
            SetWindowLongW( hWnd, GWL_STYLE, style );
        }
        if ((state & 3) != wParam)
        {
            set_button_state( hWnd, (state & ~3) | wParam );
            paint_button( hWnd, btn_type, ODA_SELECT );
        }
        if ((btn_type == BS_AUTORADIOBUTTON) && (wParam == BUTTON_CHECKED) && (style & WS_CHILD))
            BUTTON_CheckAutoRadioButton( hWnd );
        break;

#ifndef __REACTOS__
    case BM_GETSTATE16:
#endif
    case BM_GETSTATE:
        return get_button_state( hWnd );

#ifndef __REACTOS__
    case BM_SETSTATE16:
#endif
    case BM_SETSTATE:
        state = get_button_state( hWnd );
        if (wParam)
        {
            if (state & BUTTON_HIGHLIGHTED) break;
            set_button_state( hWnd, state | BUTTON_HIGHLIGHTED );
        }
        else
        {
            if (!(state & BUTTON_HIGHLIGHTED)) break;
            set_button_state( hWnd, state & ~BUTTON_HIGHLIGHTED );
        }
        paint_button( hWnd, btn_type, ODA_SELECT );
        break;

    case WM_NCHITTEST:
        if(btn_type == BS_GROUPBOX) return HTTRANSPARENT;
        /* fall through */
    default:
        return unicode ? DefWindowProcW(hWnd, uMsg, wParam, lParam) :
                         DefWindowProcA(hWnd, uMsg, wParam, lParam);
    }
    return 0;
}

/***********************************************************************
 *           ButtonWndProcW
 * The button window procedure. This is just a wrapper which locks
 * the passed HWND and calls the real window procedure (with a WND*
 * pointer pointing to the locked windowstructure).
 */
static LRESULT WINAPI ButtonWndProcW( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    if (!IsWindow( hWnd )) return 0;
    return ButtonWndProc_common( hWnd, uMsg, wParam, lParam, TRUE );
}


/***********************************************************************
 *           ButtonWndProcA
 */
static LRESULT WINAPI ButtonWndProcA( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    if (!IsWindow( hWnd )) return 0;
    return ButtonWndProc_common( hWnd, uMsg, wParam, lParam, FALSE );
}


/**********************************************************************
 * Convert button styles to flags used by DrawText.
 * TODO: handle WS_EX_RIGHT extended style.
 */
static UINT BUTTON_BStoDT(DWORD style)
{
   UINT dtStyle = DT_NOCLIP;  /* We use SelectClipRgn to limit output */

   /* "Convert" pushlike buttons to pushbuttons */
   if (style & BS_PUSHLIKE)
      style &= ~0x0F;

   if (!(style & BS_MULTILINE))
      dtStyle |= DT_SINGLELINE;
   else
      dtStyle |= DT_WORDBREAK;

   switch (style & BS_CENTER)
   {
      case BS_LEFT:   /* DT_LEFT is 0 */    break;
      case BS_RIGHT:  dtStyle |= DT_RIGHT;  break;
      case BS_CENTER: dtStyle |= DT_CENTER; break;
      default:
         /* Pushbutton's text is centered by default */
         if (get_button_type(style) <= BS_DEFPUSHBUTTON) dtStyle |= DT_CENTER;
         /* all other flavours have left aligned text */
   }

   /* DrawText ignores vertical alignment for multiline text,
    * but we use these flags to align label manualy.
    */
   if (get_button_type(style) != BS_GROUPBOX)
   {
      switch (style & BS_VCENTER)
      {
         case BS_TOP:     /* DT_TOP is 0 */      break;
         case BS_BOTTOM:  dtStyle |= DT_BOTTOM;  break;
         case BS_VCENTER: /* fall through */
         default:         dtStyle |= DT_VCENTER; break;
      }
   }
   else
      /* GroupBox's text is always single line and is top aligned. */
      dtStyle |= DT_SINGLELINE;

   return dtStyle;
}

/**********************************************************************
 *       BUTTON_CalcLabelRect
 *
 *   Calculates label's rectangle depending on button style.
 *
 * Returns flags to be passed to DrawText.
 * Calculated rectangle doesn't take into account button state
 * (pushed, etc.). If there is nothing to draw (no text/image) output
 * rectangle is empty, and return value is (UINT)-1.
 */
static UINT BUTTON_CalcLabelRect(HWND hwnd, HDC hdc, RECT *rc)
{
   LONG style = GetWindowLongW( hwnd, GWL_STYLE );
   WCHAR *text;
   ICONINFO    iconInfo;
   BITMAP      bm;
   UINT        dtStyle = BUTTON_BStoDT(style);
   RECT        r = *rc;
   INT         n;

   /* Calculate label rectangle according to label type */
   switch (style & (BS_ICON|BS_BITMAP))
   {
      case BS_TEXT:
          if (!(text = get_button_text( hwnd ))) goto empty_rect;
          if (!text[0])
          {
              HeapFree( GetProcessHeap(), 0, text );
              goto empty_rect;
          }
          DrawTextW(hdc, text, -1, &r, dtStyle | DT_CALCRECT);
          HeapFree( GetProcessHeap(), 0, text );
          break;

      case BS_ICON:
         if (!GetIconInfo((HICON)GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET ), &iconInfo))
            goto empty_rect;

         GetObjectW (iconInfo.hbmColor, sizeof(BITMAP), &bm);

         r.right  = r.left + bm.bmWidth;
         r.bottom = r.top  + bm.bmHeight;

         DeleteObject(iconInfo.hbmColor);
         DeleteObject(iconInfo.hbmMask);
         break;

      case BS_BITMAP:
         if (!GetObjectW( (HANDLE)GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET ), sizeof(BITMAP), &bm))
            goto empty_rect;

         r.right  = r.left + bm.bmWidth;
         r.bottom = r.top  + bm.bmHeight;
         break;

      default:
      empty_rect:
         rc->right = r.left;
         rc->bottom = r.top;
         return (UINT)(LONG)-1;
   }

   /* Position label inside bounding rectangle according to
    * alignment flags. (calculated rect is always left-top aligned).
    * If label is aligned to any side - shift label in opposite
    * direction to leave extra space for focus rectangle.
    */
   switch (dtStyle & (DT_CENTER|DT_RIGHT))
   {
      case DT_LEFT:    r.left++;  r.right++;  break;
      case DT_CENTER:  n = r.right - r.left;
                       r.left   = rc->left + ((rc->right - rc->left) - n) / 2;
                       r.right  = r.left + n; break;
      case DT_RIGHT:   n = r.right - r.left;
                       r.right  = rc->right - 1;
                       r.left   = r.right - n;
                       break;
   }

   switch (dtStyle & (DT_VCENTER|DT_BOTTOM))
   {
      case DT_TOP:     r.top++;  r.bottom++;  break;
      case DT_VCENTER: n = r.bottom - r.top;
                       r.top    = rc->top + ((rc->bottom - rc->top) - n) / 2;
                       r.bottom = r.top + n;  break;
      case DT_BOTTOM:  n = r.bottom - r.top;
                       r.bottom = rc->bottom - 1;
                       r.top    = r.bottom - n;
                       break;
   }

   *rc = r;
   return dtStyle;
}


/**********************************************************************
 *       BUTTON_DrawTextCallback
 *
 *   Callback function used by DrawStateW function.
 */
static BOOL CALLBACK BUTTON_DrawTextCallback(HDC hdc, LPARAM lp, WPARAM wp, int cx, int cy)
{
   RECT rc;
   rc.left = 0;
   rc.top = 0;
   rc.right = cx;
   rc.bottom = cy;

   DrawTextW(hdc, (LPCWSTR)lp, -1, &rc, (UINT)wp);
   return TRUE;
}


/**********************************************************************
 *       BUTTON_DrawLabel
 *
 *   Common function for drawing button label.
 */
static void BUTTON_DrawLabel(HWND hwnd, HDC hdc, UINT dtFlags, RECT *rc)
{
   DRAWSTATEPROC lpOutputProc = NULL;
   LPARAM lp;
   WPARAM wp = 0;
   HBRUSH hbr = 0;
   UINT flags = IsWindowEnabled(hwnd) ? DSS_NORMAL : DSS_DISABLED;
   LONG state = get_button_state( hwnd );
   LONG style = GetWindowLongW( hwnd, GWL_STYLE );
   WCHAR *text = NULL;

   /* FIXME: To draw disabled label in Win31 look-and-feel, we probably
    * must use DSS_MONO flag and COLOR_GRAYTEXT brush (or maybe DSS_UNION).
    * I don't have Win31 on hand to verify that, so I leave it as is.
    */

   if ((style & BS_PUSHLIKE) && (state & BUTTON_3STATE))
   {
      hbr = GetSysColorBrush(COLOR_GRAYTEXT);
      flags |= DSS_MONO;
   }

   switch (style & (BS_ICON|BS_BITMAP))
   {
      case BS_TEXT:
         /* DST_COMPLEX -- is 0 */
         lpOutputProc = BUTTON_DrawTextCallback;
         if (!(text = get_button_text( hwnd ))) return;
         lp = (LPARAM)text;
         wp = (WPARAM)dtFlags;
         break;

      case BS_ICON:
         flags |= DST_ICON;
         lp = GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET );