顺德市慢性病防治中心:CTreeCtrl重载时若干个技巧

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CTreeCtrl重载时若干个技巧收藏
当标准的CTreeCtrl不能符合我们的使用要求时，通常会对它进行重载，下面列出若干个技巧。1，使用Vista的风格#pragma comment(lib,"UxTheme.lib")::SetWindowTheme(m_hWnd,L"Explorer", NULL);2，改变checkbox的图标新建一个CImageList之后，将自己需要的图标添加进去，然后设置一下this->SetImageList(&m_iStateIconList,TVSIL_STATE);前提是，CTreeCtrl的属性中有TVS_CHECKBOXES3，区分checkbox图标点击和文字被点击的方法 view plaincopy to clipboardprint?
UINT nState;
UINT uFlags = 0;
HTREEITEM selectItem = HitTest(point, &uFlags);
if(selectItem == NULL)
{
    return;
}

if(!(uFlags & TVHT_ONITEMSTATEICON))
{
    //item clicked
    //you want do
}
else
{
    //nState: 0->No ChenckBox
    //        1->No Select State
    //        2->Some Select
    //        3->All Select
    nState = GetItemState(selectItem,TVIS_STATEIMAGEMASK) >>12;
   nState=(nState==3)?1:3;
}
UINT nState;
UINT uFlags = 0;
HTREEITEM selectItem = HitTest(point, &uFlags);
if(selectItem == NULL)
{
    return;
}if(!(uFlags & TVHT_ONITEMSTATEICON))
{
    //item clicked
    //you want do
}
else
{
    //nState: 0->No ChenckBox
    //        1->No Select State
    //        2->Some Select
    //        3->All Select
    nState = GetItemState(selectItem,TVIS_STATEIMAGEMASK) >>12;
   nState=(nState==3)?1:3;
} 注意，如果处理中发生了展开或者收缩的情况的话，hittest有错的时候。4，更改树显示的背景以及文字颜色 view plaincopy to clipboardprint?
void CTreeCtrlEx::OnNMCustomdraw(NMHDR *pNMHDR, LRESULT *pResult)
{

     LPNMTVCUSTOMDRAW pNMCD = reinterpret_cast(pNMHDR);
    switch (pNMCD->nmcd.dwDrawStage)
    {
    case CDDS_PREPAINT:
        *pResult = CDRF_NOTIFYITEMDRAW;
        return;
    case CDDS_ITEMPREPAINT:
    HTREEITEM parentitem=GetParentItem((HTREEITEM)pNMCD->nmcd.dwItemSpec);
    if(parentitem == NULL)
    {
        pNMCD->clrText =RGB(0, 255, 255);
        pNMCD->clrTextBk =RGB(0, 0, 255);
    }
        break;
    }
    *pResult = 0;
}
void CTreeCtrlEx::OnNMCustomdraw(NMHDR *pNMHDR, LRESULT *pResult)
{     LPNMTVCUSTOMDRAW pNMCD = reinterpret_cast(pNMHDR);
    switch (pNMCD->nmcd.dwDrawStage)
    {
    case CDDS_PREPAINT:
        *pResult = CDRF_NOTIFYITEMDRAW;
        return;
    case CDDS_ITEMPREPAINT:
HTREEITEM parentitem=GetParentItem((HTREEITEM)pNMCD->nmcd.dwItemSpec);
if(parentitem == NULL)
{
  pNMCD->clrText =RGB(0, 255, 255);
  pNMCD->clrTextBk =RGB(0, 0, 255);
}
        break;
    }
    *pResult = 0;
} 5，遍历修改checkbox的状态重载SetItemState函数之后，调用下面2个遍历函数。 view plaincopy to clipboardprint?
BOOL CTreeCtrlEx::SetItemState(HTREEITEM hItem, UINT nState,UINT nStateMask, BOOL bSearch)
{

    BOOL bReturn=CTreeCtrl::SetItemState( hItem, nState, nStateMask );

    UINT iState = nState >> 12;
    if(iState!=0)
    {
        if(bSearch) TravelChild(hItem, iState);
        TravelSiblingAndParent(hItem,iState);
    }
    return bReturn;
}

void CTreeCtrlEx::TravelSiblingAndParent(HTREEITEM hItem, int nState)
{
    HTREEITEM hNextSiblingItem,hPrevSiblingItem,hParentItem;

    //Find parent node if not exists return;
    hParentItem=GetParentItem(hItem);
    if(hParentItem!=NULL)
    {
        int nState1=nState;

        //Find The Node State after Currently node
        hNextSiblingItem=GetNextSiblingItem(hItem);
        while(hNextSiblingItem!=NULL)
        {
            nState1 = GetItemState( hNextSiblingItem, TVIS_STATEIMAGEMASK ) >> 12;
            if(nState1!=nState && nState1!=0) break;
            else hNextSiblingItem=GetNextSiblingItem(hNextSiblingItem);
        }

        if(nState1==nState)
        {
            //Find The Node State before Currently node
            hPrevSiblingItem=GetPrevSiblingItem(hItem);
            while(hPrevSiblingItem!=NULL)
            {
                nState1 = GetItemState(hPrevSiblingItem,TVIS_STATEIMAGEMASK)>> 12;
                if(nState1!=nState && nState1!=0) break;
                else hPrevSiblingItem=GetPrevSiblingItem(hPrevSiblingItem);
            }
        }

        if(nState1==nState || nState1==0)
        {
            nState1 = GetItemState( hParentItem, TVIS_STATEIMAGEMASK ) >> 12;
            if(nState1!=0)
            {
                CTreeCtrl::SetItemState( hParentItem,INDEXTOSTATEIMAGEMASK(nState), TVIS_STATEIMAGEMASK );
            }

            TravelSiblingAndParent(hParentItem,nState);
        }
        else
        {
            //third state
            hParentItem=GetParentItem(hItem);
            while(hParentItem!=NULL)
            {
                nState1 = GetItemState( hParentItem, TVIS_STATEIMAGEMASK ) >> 12;
                if(nState1!=0)
                {
                    CTreeCtrl::SetItemState( hParentItem,
                        INDEXTOSTATEIMAGEMASK(2), TVIS_STATEIMAGEMASK );
                }
                hParentItem=GetParentItem(hParentItem);
            }
        }
    }
}

void CTreeCtrlEx::TravelChild(HTREEITEM hItem, int nState)
{
    HTREEITEM hChildItem,hBrotherItem;

    hChildItem=GetChildItem(hItem);
    if(hChildItem!=NULL)
    {

        CTreeCtrl::SetItemState(hChildItem,INDEXTOSTATEIMAGEMASK(nState),
                                TVIS_STATEIMAGEMASK );
        TravelChild(hChildItem, nState);

        hBrotherItem=GetNextSiblingItem(hChildItem);
        while (hBrotherItem)
        {
            int nState1 = GetItemState( hBrotherItem, TVIS_STATEIMAGEMASK ) >> 12;
            if(nState1!=0)
            {
                CTreeCtrl::SetItemState( hBrotherItem,
                INDEXTOSTATEIMAGEMASK(nState),TVIS_STATEIMAGEMASK );
            }

            TravelChild(hBrotherItem, nState);
            hBrotherItem=GetNextSiblingItem(hBrotherItem);
        }
    }
}
BOOL CTreeCtrlEx::SetItemState(HTREEITEM hItem, UINT nState,UINT nStateMask, BOOL bSearch)
{ BOOL bReturn=CTreeCtrl::SetItemState( hItem, nState, nStateMask ); UINT iState = nState >> 12;
if(iState!=0)
{
  if(bSearch) TravelChild(hItem, iState);
  TravelSiblingAndParent(hItem,iState);
}
return bReturn;
}void CTreeCtrlEx::TravelSiblingAndParent(HTREEITEM hItem, int nState)
{
HTREEITEM hNextSiblingItem,hPrevSiblingItem,hParentItem;

//Find parent node if not exists return;
hParentItem=GetParentItem(hItem);
if(hParentItem!=NULL)
{
  int nState1=nState;

  //Find The Node State after Currently node
  hNextSiblingItem=GetNextSiblingItem(hItem);
  while(hNextSiblingItem!=NULL)
  {
   nState1 = GetItemState( hNextSiblingItem, TVIS_STATEIMAGEMASK ) >> 12;
   if(nState1!=nState && nState1!=0) break;
   else hNextSiblingItem=GetNextSiblingItem(hNextSiblingItem);
  }

  if(nState1==nState)
  {
   //Find The Node State before Currently node
   hPrevSiblingItem=GetPrevSiblingItem(hItem);
   while(hPrevSiblingItem!=NULL)
   {
    nState1 = GetItemState(hPrevSiblingItem,TVIS_STATEIMAGEMASK)>> 12;
    if(nState1!=nState && nState1!=0) break;
    else hPrevSiblingItem=GetPrevSiblingItem(hPrevSiblingItem);
   }
  }

  if(nState1==nState || nState1==0)
  {
   nState1 = GetItemState( hParentItem, TVIS_STATEIMAGEMASK ) >> 12;
   if(nState1!=0)
   {
    CTreeCtrl::SetItemState( hParentItem,INDEXTOSTATEIMAGEMASK(nState), TVIS_STATEIMAGEMASK );
   }   TravelSiblingAndParent(hParentItem,nState);
  }
  else
  {
   //third state
   hParentItem=GetParentItem(hItem);
   while(hParentItem!=NULL)
   {
    nState1 = GetItemState( hParentItem, TVIS_STATEIMAGEMASK ) >> 12;
    if(nState1!=0)
    {
     CTreeCtrl::SetItemState( hParentItem,
      INDEXTOSTATEIMAGEMASK(2), TVIS_STATEIMAGEMASK );
    }
    hParentItem=GetParentItem(hParentItem);
   }
  }
}
}void CTreeCtrlEx::TravelChild(HTREEITEM hItem, int nState)
{
HTREEITEM hChildItem,hBrotherItem;

hChildItem=GetChildItem(hItem);
if(hChildItem!=NULL)
{  CTreeCtrl::SetItemState(hChildItem,INDEXTOSTATEIMAGEMASK(nState),
        TVIS_STATEIMAGEMASK );
  TravelChild(hChildItem, nState);

  hBrotherItem=GetNextSiblingItem(hChildItem);
  while (hBrotherItem)
  {
   int nState1 = GetItemState( hBrotherItem, TVIS_STATEIMAGEMASK ) >> 12;
   if(nState1!=0)
   {
    CTreeCtrl::SetItemState( hBrotherItem,
    INDEXTOSTATEIMAGEMASK(nState),TVIS_STATEIMAGEMASK );
   }

   TravelChild(hBrotherItem, nState);
   hBrotherItem=GetNextSiblingItem(hBrotherItem);
  }
}
}
  本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/hzlyh/archive/2010/03/02/5339073.aspx

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