QTableWidget和 QTableView翻页效果（准确计算Scroll，然后使用setSliderPosition函数）

以QTableView举例，QTableWidget使用相同

int CQTTableViewPageSwitch::pageCount(QTableView *p)//QTableView 总页数

{

    if(p == NULL)  return -1;

    int rowCount = p->model()->rowCount();

    int rowHeight = p->rowHeight(0);

    int tableViewHeight = p->height();

    int rowCountPerPage = tableViewHeight/rowHeight-1;//每页显示行数

    int ret = rowCount/rowCountPerPage;

    int tem = rowCount%rowCountPerPage;

    if (tem != 0) ret++;

    return ret;

}

BOOL CQTTableViewPageSwitch::pageTo(QTableView *p, int pageNO)//翻到指定页

{

    if(p == NULL)  return false;

    int maxPage = pageCount(p);

    if(pageNO > maxPage)  return false;

    int rowCount = p->model()->rowCount();

    int rowHeight = p->rowHeight(0);

    int tableViewHeight = p->height();

    int rowCountPerPage = tableViewHeight/rowHeight-1;		//每页显示行数

    int canNotViewCount = rowCount-rowCountPerPage;			//看不见的行数

    if(canNotViewCount == 0) return false;

    int maxValue = p->verticalScrollBar()->maximum();		// 当前SCROLLER最大显示值

    if(maxValue == 0) return false;

    int pageValue = (maxValue*rowCountPerPage)/canNotViewCount;

    p->verticalScrollBar()->setSliderPosition(pageValue*(pageNO-1));

}

BOOL CQTTableViewPageSwitch::pageUp(QTableView *p,BOOL isLoop)//上翻

{

    if(p == NULL)  return false;

    int rowCount = p->model()->rowCount();

    int rowHeight = p->rowHeight(0);

    int tableViewHeight = p->height();

    int rowCountPerPage = tableViewHeight/rowHeight-1;		//每页显示行数

    int canNotViewCount = rowCount-rowCountPerPage;			//看不见的行数

    if(canNotViewCount == 0) return false;

    int maxValue = p->verticalScrollBar()->maximum();		// 当前SCROLLER最大显示值

    if(maxValue == 0) return false;

    int pageValue = (maxValue*rowCountPerPage)/canNotViewCount;

    int nCurScroller = p->verticalScrollBar()->value();		//获得当前scroller值

    if(nCurScroller>0)

        p->verticalScrollBar()->setSliderPosition(nCurScroller-pageValue);

    else

    {

        if(isLoop == TRUE)

            p->verticalScrollBar()->setSliderPosition(maxValue);

    }

}

BOOL CQTTableViewPageSwitch::pageDown(QTableView *p,BOOL isLoop)//下翻

{

    if(p == NULL)  return false;

    int rowCount = p->model()->rowCount();

    int rowHeight = p->rowHeight(0);

    int tableViewHeight = p->height();

    int rowCountPerPage = tableViewHeight/rowHeight-1;		//每页显示行数

    int canNotViewCount = rowCount-rowCountPerPage;			//看不见的行数

    if(canNotViewCount == 0)

        return false;

    int maxValue = p->verticalScrollBar()->maximum();		// 当前SCROLLER最大显示值

    if(maxValue == 0)

        return false;

    int pageValue = (maxValue*rowCountPerPage)/canNotViewCount;

    int nCurScroller = p->verticalScrollBar()->value();		//获得当前scroller值

    if(nCurScroller<maxValue)

        p->verticalScrollBar()->setSliderPosition(nCurScroller+pageValue);

    else

    {

        if(isLoop == TRUE)

            p->verticalScrollBar()->setSliderPosition(0);

    }

}

BOOL CQTTableViewPageSwitch::pageHome(QTableView *p)//首页

{

    if(p == NULL)  return false;

    int maxValue = p->verticalScrollBar()->maximum(); // 当前SCROLLER最大显示值

    if(maxValue == 0)  return false;

    p->verticalScrollBar()->setSliderPosition(0);

}

BOOL CQTTableViewPageSwitch::pageEnd(QTableView *p)//末页

{

    if(p == NULL)  return false;

    int maxValue = p->verticalScrollBar()->maximum(); // 当前SCROLLER最大显示值

    if(maxValue == 0)  return false;

    p->verticalScrollBar()->setSliderPosition(maxValue);

}

http://blog.csdn.net/liuguangzhou123/article/details/8109089