tab.c

winNT技术操作系统,国外开放的原代码和LIUX一样

          /* shift the item to the left side of the clientRect */
          curr->rect.right -= curr->rect.left;
          curr->rect.left = 0;

          TRACE("r=%d, cl=%d, cl.r=%d, iCount=%d, iRow=%d, uNumRows=%d, remTab=%d, tabPerRow=%d\n",
	      curr->rect.right, curItemLeftPos, clientRect.right,
	      iCount, iRow, infoPtr->uNumRows, remTab, tabPerRow);

          /* if we have reached the maximum number of tabs on this row */
          /* move to the next row, reset our current item left position and */
          /* the count of items on this row */

	  if (lStyle & TCS_VERTICAL) {
	      /* Vert: Add the remaining tabs in the *last* remainder rows */
	      if (iCount >= ((iRow>=(INT)infoPtr->uNumRows - remTab)?tabPerRow + 1:tabPerRow)) {
		  iRow++;
		  curItemLeftPos = 0;
		  iCount = 0;
	      }
	  } else {
	      /* Horz: Add the remaining tabs in the *first* remainder rows */
	      if (iCount >= ((iRow<remTab)?tabPerRow + 1:tabPerRow)) {
		  iRow++;
		  curItemLeftPos = 0;
		  iCount = 0;
	      }
	  }

          /* shift the item to the right to place it as the next item in this row */
          curr->rect.left += curItemLeftPos;
          curr->rect.right += curItemLeftPos;
          curr->rect.top = iRow;
          if (lStyle & TCS_BUTTONS)
	  {
            curItemLeftPos = curr->rect.right + 1;
            if (lStyle & TCS_FLATBUTTONS)
	      curItemLeftPos += FLAT_BTN_SPACINGX;
	  }
          else
            curItemLeftPos = curr->rect.right;

          TRACE("arranging <%s>, l,r=%d,%d, row=%d\n",
	      debugstr_w(curr->pszText), curr->rect.left,
	      curr->rect.right, curr->rect.top);
      }

      /*
       * Justify the rows
       */
      {
	INT widthDiff, iIndexStart=0, iIndexEnd=0;
	INT remainder;
	INT iCount=0;

        while(iIndexStart < infoPtr->uNumItem)
        {
          TAB_ITEM *start = TAB_GetItem(infoPtr, iIndexStart);

          /*
           * find the index of the row
           */
          /* find the first item on the next row */
          for (iIndexEnd=iIndexStart;
              (iIndexEnd < infoPtr->uNumItem) &&
 	      (TAB_GetItem(infoPtr, iIndexEnd)->rect.top ==
                start->rect.top) ;
              iIndexEnd++)
          /* intentionally blank */;

          /*
           * we need to justify these tabs so they fill the whole given
           * client area
           *
           */
          /* find the amount of space remaining on this row */
          widthDiff = clientRect.right - (2 * SELECTED_TAB_OFFSET) -
			TAB_GetItem(infoPtr, iIndexEnd - 1)->rect.right;

	  /* iCount is the number of tab items on this row */
	  iCount = iIndexEnd - iIndexStart;

	  if (iCount > 1)
	  {
	    remainder = widthDiff % iCount;
	    widthDiff = widthDiff / iCount;
	    /* add widthDiff/iCount, or extra space/items on row, to each item on this row */
	    for (iIndex=iIndexStart, iCount=0; iIndex < iIndexEnd; iIndex++, iCount++)
	    {
              TAB_ITEM *item = TAB_GetItem(infoPtr, iIndex);

	      item->rect.left += iCount * widthDiff;
	      item->rect.right += (iCount + 1) * widthDiff;

              TRACE("adjusting 1 <%s>, l,r=%d,%d\n",
		  debugstr_w(item->pszText),
		  item->rect.left, item->rect.right);

	    }
	    TAB_GetItem(infoPtr, iIndex - 1)->rect.right += remainder;
	  }
	  else /* we have only one item on this row, make it take up the entire row */
	  {
	    start->rect.left = clientRect.left;
	    start->rect.right = clientRect.right - 4;

            TRACE("adjusting 2 <%s>, l,r=%d,%d\n",
		debugstr_w(start->pszText),
		start->rect.left, start->rect.right);

	  }


	  iIndexStart = iIndexEnd;
	}
      }
  }

  /* if TCS_VERTICAL rotate the tabs so they are along the side of the clientRect */
  if(lStyle & TCS_VERTICAL)
  {
    RECT rcOriginal;
    for(iIndex = 0; iIndex < infoPtr->uNumItem; iIndex++)
    {
      rcItem = &TAB_GetItem(infoPtr, iIndex)->rect;

      rcOriginal = *rcItem;

      /* this is rotating the items by 90 degrees clockwise around the center of the control */
      rcItem->top = (rcOriginal.left - clientRect.left);
      rcItem->bottom = rcItem->top + (rcOriginal.right - rcOriginal.left);
      rcItem->left = rcOriginal.top;
      rcItem->right = rcOriginal.bottom;
    }
  }

  TAB_EnsureSelectionVisible(infoPtr);
  TAB_RecalcHotTrack(infoPtr, NULL, NULL, NULL);

  /* Cleanup */
  SelectObject (hdc, hOldFont);
  ReleaseDC (infoPtr->hwnd, hdc);
}


static void
TAB_EraseTabInterior
    (
    TAB_INFO*   infoPtr,
    HDC         hdc,
    INT         iItem,
    RECT*       drawRect
    )
{
    LONG     lStyle  = GetWindowLongW(infoPtr->hwnd, GWL_STYLE);
    HBRUSH   hbr = CreateSolidBrush (comctl32_color.clrBtnFace);
    BOOL     deleteBrush = TRUE;
    RECT     rTemp = *drawRect;

    InflateRect(&rTemp, -2, -2);
    if (lStyle & TCS_BUTTONS)
    {
	if (iItem == infoPtr->iSelected)
	{
	    /* Background color */
	    if (!(lStyle & TCS_OWNERDRAWFIXED))
	    {
		DeleteObject(hbr);
		hbr = GetSysColorBrush(COLOR_SCROLLBAR);

		SetTextColor(hdc, comctl32_color.clr3dFace);
		SetBkColor(hdc, comctl32_color.clr3dHilight);

		/* if COLOR_WINDOW happens to be the same as COLOR_3DHILIGHT
		* we better use 0x55aa bitmap brush to make scrollbar's background
		* look different from the window background.
		*/
		if (comctl32_color.clr3dHilight == comctl32_color.clrWindow)
		    hbr = COMCTL32_hPattern55AABrush;

		deleteBrush = FALSE;
	    }
	    FillRect(hdc, &rTemp, hbr);
	}
	else  /* ! selected */
	{
	    if (lStyle & TCS_FLATBUTTONS)
	    {
		FillRect(hdc, drawRect, hbr);
		if (iItem == infoPtr->iHotTracked)
		    DrawEdge(hdc, drawRect, EDGE_RAISED, BF_SOFT|BF_RECT);
	    }
	    else
		FillRect(hdc, &rTemp, hbr);
	}

    }
    else /* !TCS_BUTTONS */
    {
        if (!GetWindowTheme (infoPtr->hwnd))
	    FillRect(hdc, &rTemp, hbr);
    }

    /* Cleanup */
    if (deleteBrush) DeleteObject(hbr);
}

/******************************************************************************
 * TAB_DrawItemInterior
 *
 * This method is used to draw the interior (text and icon) of a single tab
 * into the tab control.
 */
static void
TAB_DrawItemInterior
  (
  TAB_INFO*   infoPtr,
  HDC         hdc,
  INT         iItem,
  RECT*       drawRect
  )
{
  LONG      lStyle  = GetWindowLongW(infoPtr->hwnd, GWL_STYLE);

  RECT localRect;

  HPEN   htextPen;
  HPEN   holdPen;
  INT    oldBkMode;
  HFONT  hOldFont;
  
/*  if (drawRect == NULL) */
  {
    BOOL isVisible;
    RECT itemRect;
    RECT selectedRect;

    /*
     * Get the rectangle for the item.
     */
    isVisible = TAB_InternalGetItemRect(infoPtr, iItem, &itemRect, &selectedRect);
    if (!isVisible)
      return;

    /*
     * Make sure drawRect points to something valid; simplifies code.
     */
    drawRect = &localRect;

    /*
     * This logic copied from the part of TAB_DrawItem which draws
     * the tab background.  It's important to keep it in sync.  I
     * would have liked to avoid code duplication, but couldn't figure
     * out how without making spaghetti of TAB_DrawItem.
     */
    if (iItem == infoPtr->iSelected)
      *drawRect = selectedRect;
    else
      *drawRect = itemRect;
        
    if (lStyle & TCS_BUTTONS)
    {
      if (iItem == infoPtr->iSelected)
      {
	drawRect->left   += 4;
	drawRect->top    += 4;
	drawRect->right  -= 4;
	drawRect->bottom -= 1;
      }
      else
      {
	drawRect->left   += 2;
	drawRect->top    += 2;
	drawRect->right  -= 2;
	drawRect->bottom -= 2;
      }
    }
    else
    {
      if ((lStyle & TCS_VERTICAL) && (lStyle & TCS_BOTTOM))
      {
        if (iItem != infoPtr->iSelected)
	{
	  drawRect->left   += 2;
	  drawRect->top    += 2;
	  drawRect->bottom -= 2;
	}
      }
      else if (lStyle & TCS_VERTICAL)
      {
        if (iItem == infoPtr->iSelected)
	{
	  drawRect->right  += 1;
	}
	else
	{
	  drawRect->top    += 2;
	  drawRect->right  -= 2;
	  drawRect->bottom -= 2;
	}
      }
      else if (lStyle & TCS_BOTTOM)
      {
        if (iItem == infoPtr->iSelected)
	{
	  drawRect->top    -= 2;
	}
	else
	{
	  InflateRect(drawRect, -2, -2);
          drawRect->bottom += 2;
	}
      }
      else
      {
        if (iItem == infoPtr->iSelected)
	{
	  drawRect->bottom += 3;
	}
	else
	{
	  drawRect->bottom -= 2;
	  InflateRect(drawRect, -2, 0);
	}
      }
    }
  }
  TRACE("drawRect=(%d,%d)-(%d,%d)\n",
	  drawRect->left, drawRect->top, drawRect->right, drawRect->bottom);

  /* Clear interior */
  TAB_EraseTabInterior (infoPtr, hdc, iItem, drawRect);

  /* Draw the focus rectangle */
  if (!(lStyle & TCS_FOCUSNEVER) &&
      (GetFocus() == infoPtr->hwnd) &&
      (iItem == infoPtr->uFocus) )
  {
    RECT rFocus = *drawRect;
    InflateRect(&rFocus, -3, -3);
    if (lStyle & TCS_BOTTOM && !(lStyle & TCS_VERTICAL))
      rFocus.top -= 3;
    if (lStyle & TCS_BUTTONS)
    {
      rFocus.left -= 3;
      rFocus.top -= 3;
    }

    DrawFocusRect(hdc, &rFocus);
  }

  /*
   * Text pen
   */
  htextPen = CreatePen( PS_SOLID, 1, GetSysColor(COLOR_BTNTEXT) );
  holdPen  = SelectObject(hdc, htextPen);
  hOldFont = SelectObject(hdc, infoPtr->hFont);

  /*
   * Setup for text output
  */
  oldBkMode = SetBkMode(hdc, TRANSPARENT);
  if (!GetWindowTheme (infoPtr->hwnd) || (lStyle & TCS_BUTTONS))
      SetTextColor(hdc, (((lStyle & TCS_HOTTRACK) && (iItem == infoPtr->iHotTracked) 
                          && !(lStyle & TCS_FLATBUTTONS)) 
                        | (TAB_GetItem(infoPtr, iItem)->dwState & TCIS_HIGHLIGHTED)) ?
                        comctl32_color.clrHighlight : comctl32_color.clrBtnText);

  /*
   * if owner draw, tell the owner to draw
   */
  if ((lStyle & TCS_OWNERDRAWFIXED) && GetParent(infoPtr->hwnd))
  {
    DRAWITEMSTRUCT dis;
    UINT id;

    drawRect->top += 2;
    drawRect->right -= 1;
    if ( iItem == infoPtr->iSelected )
    {
        drawRect->right -= 1;
        drawRect->left += 1;
    }

    /*
     * get the control id
     */
    id = (UINT)GetWindowLongPtrW( infoPtr->hwnd, GWLP_ID );

    /*
     * put together the DRAWITEMSTRUCT
     */
    dis.CtlType    = ODT_TAB;
    dis.CtlID      = id;
    dis.itemID     = iItem;
    dis.itemAction = ODA_DRAWENTIRE;
    dis.itemState = 0;
    if ( iItem == infoPtr->iSelected )
      dis.itemState |= ODS_SELECTED;
    if (infoPtr->uFocus == iItem) 
      dis.itemState |= ODS_FOCUS;
    dis.hwndItem = infoPtr->hwnd;
    dis.hDC      = hdc;
    CopyRect(&dis.rcItem,drawRect);
    dis.itemData = (ULONG_PTR)TAB_GetItem(infoPtr, iItem)->extra;

    /*
     * send the draw message
     */
    SendMessageW( infoPtr->hwndNotify, WM_DRAWITEM, (WPARAM)id, (LPARAM)&dis );
  }
  else
  {
    TAB_ITEM *item = TAB_GetItem(infoPtr, iItem);
    RECT rcTemp;
    RECT rcImage;

    /* used to center the icon and text in the tab */
    RECT rcText;
    INT center_offset_h, center_offset_v;

    /* set rcImage to drawRect, we will use top & left in our ImageList_Draw call */
    rcImage = *drawRect;

    rcTemp = *drawRect;

    rcText.left = rcText.top = rcText.right = rcText.bottom = 0;

    /* get the rectangle that the text fits in */
    if (item->pszText)
    {
      DrawTextW(hdc, item->pszText, -1, &rcText, DT_CALCRECT);
    }
    /*
     * If not owner draw, then do the drawing ourselves.