一 基础操作
1 插入节点
1)插入根节点
-
- HTREEITEM hRoot;
- CString str=L"ROOT"
- hRoot=nTreeCtrl.InsertItem(str);
-
-
- hRoot=nTreeCtrl.InsertItem(str,TVI_ROOT,TVI_LAST);
2)插入孩子节点
-
- HTREEITEM hChild=nTreeCtrl.InsertItem(str,hRoot);
-
-
- HTREEITEM hChild=nTreeCtrl.InsertItem(str,hRoot,TVI_LAST);
2 获得节点句柄
-
- HTREEITEM hRootItem;
- hRootItem=nTreeCtrl.GetRootItem();
-
-
-
- HTREEITEM hCurrentItem;
- hCurrentItem=nTreeCtrl.GetSelectedItem();
-
-
-
-
- HTREEITEM hPreItem;
- hPreItem=nTreeCtrl.GetNextItem(hItem,TVGN_PREVIOUS);
-
-
-
- HTREEITEM hNextItem;
- hNextItem=nTreeCtrl.GetNextItem(hItem,TVGN_NEXT);
3 判断某节点是否有孩子节点
-
- if (nTreeCtrl.ItemHasChildren(hRoot))
4 展开或收缩子节点
-
- if(nTreeCtrl.ItemHasChildren(hRoot))
- nTreeCtrl.Expand(hParentItem,TVE_EXPAND);
5 获得第一个孩子节点的句柄
-
- if (nTreeCtrl.ItemHasChildren(hRoot))
- {
-
- HTREEITEM hChild=nTreeCtrl.GetChildItem(hRoot);
-
- }
6 遍历hRoot下一层的所有孩子节点
-
- if (nTreeCtrl.ItemHasChildren(hRoot))
- {
-
- HTREEITEM hChild=nTreeCtrl.GetChildItem(hRoot);
-
-
- while(hChild)
- {
- hChild=nTreeCtrl.GetNextItem(hChild,TVGN_NEXT);
-
- }
-
- }
7 获得某节点上的文字
-
- CString str;
- nTreeCtrl.GetItemText(hRoot);
8 选择某节点,并让其获得焦点
首先,TREE控件的样式必须设置为TVS_SHOWSELALWAYS
其次: 选择该节点
- treeCtrl.SelectItem(hItem);
最后,设置焦点
Tree控件设置焦点后,会自动将焦点定位到选择的节点上
9 清空树控件
- <strong> nTreeCtrl.DeleteAllItems();</strong>
10 将指定目录下的文件插入节点
- void InsertPath(CString path, HTREEITEM hRoot, CTreeCtrl& ctrl)
- {
- CFileFind nFindFile;
- CString str=L"";
- CString nPicFileName=L"";
- BOOL IsExist=FALSE;
- HTREEITEM hSubItem;
-
- nPicFileName.Format(L"%s\\*.*",path);
- IsExist = nFindFile.FindFile(nPicFileName);
- while (IsExist)
- {
- IsExist = nFindFile.FindNextFile();
- if(nFindFile.IsDots())
- continue;
- nPicFileName = nFindFile.GetFileName();
-
-
- if(nFindFile.IsDirectory())
- {
- hSubItem = ctrl.InsertItem(nPicFileName,hRoot);
- InsertPath(nFindFile.GetFilePath(),hSubItem,ctrl);
- }
- else
- {
-
- str = nPicFileName.Right(4);
- if(!str.CompareNoCase(_T(".jpg")) || !str.CompareNoCase(_T(".tif")))
- {
- ctrl.InsertItem(nPicFileName,hRoot);
- }
- }
- }
- nFindFile.Close();
- }
- void LoadPath(CString path)
- {
- CTreeCtrl& ctrl = GetTreeCtrl();
- ASSERT(ctrl);
- ctrl.DeleteAllItems();
- HTREEITEM hRoot = ctrl.InsertItem(path);
- InsertPath(path,hRoot,ctrl);
- ctrl.Expand(hRoot,TVE_EXPAND);
-
- }
11 将文件列表中的文件插入树控件中
- void InsetAllFile( list<CString>& filePathList){
-
-
- CTreeCtrl & nTreeCtrl=((CMyTreeView*)(((CMainFrame*)AfxGetMainWnd())->m_SplitterWnd.GetPane(0,0)))->GetTreeCtrl();
- nTreeCtrl.DeleteAllItems();
-
- list<CString>::iterator it=filePathList.begin();
- HTREEITEM hRoot=NULL;
- CString filePath;
- CString treeRootName=L"根目录";
-
- while(it!=filePathList.end())
- {
- filePath=*it;
-
-
-
- if(hRoot==NULL)
- hRoot=nTreeCtrl.InsertItem(treeRootName);
-
-
-
- if(filePath.Find(treeRootName)==0)
- filePath=filePath.Right(filePath.GetLength()-treeRootName.GetLength()-1);
-
-
- LoadPicFiles(nTreeCtrl,filePath, hRoot);
-
- it++;
- }
-
- }
- void LoadPicFiles(CTreeCtrl& nTreeCtrl, CString nFilePath, HTREEITEM nRoot)
- {
-
-
-
-
-
-
-
-
-
-
-
-
-
- CString nSubFolder;
- CString nSubFilePath;
- BOOL IsExist=FALSE;
-
-
-
- int nIndex=-1;
- nIndex=nFilePath.Find(L'\\');
-
- if(nIndex>=0)
- {
- nSubFolder=nFilePath.Left(nIndex);
- nSubFilePath=nFilePath.Right(nFilePath.GetLength()-nIndex-1);
-
- HTREEITEM nSubRoot=NULL;
- if(nTreeCtrl.ItemHasChildren(nRoot))
- nSubRoot=nTreeCtrl.GetChildItem(nRoot);
- CString str;
- BOOL bExist=FALSE;
- while(nSubRoot)
- {
- str=nTreeCtrl.GetItemText(nSubRoot);
-
- if (str.CompareNoCase(nSubFolder)==0)
- {
-
- bExist=TRUE;
- break;
- }
-
- nSubRoot=nTreeCtrl.GetNextSiblingItem(nSubRoot);
- }
-
- if(!bExist)
- {
-
- nSubRoot=nTreeCtrl.InsertItem(nSubFolder,nRoot);
-
- LoadPicFiles(nTreeCtrl,nSubFilePath,nSubRoot);
- }else{
- LoadPicFiles(nTreeCtrl,nSubFilePath,nSubRoot);
- }
- }
- else if(nFilePath.Find(L".jpg")!=-1 || nFilePath.Find(L".tif")!=-1)
- {
- nTreeCtrl.InsertItem(nFilePath,nRoot);
- }
- }
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
二 扩展操作
1 响应TVN_ITEMEXPANDING 消息时 如何获得将要展开或收缩的那一个节点的句柄
MSDN:
<strong>TVN_ITEMEXPANDING</strong> <em><a target=_blank target="_blank" class="synParam" href="http://blog.csdn.net/shuilan0066/article/details/6638504" style="color: rgb(255, 153, 0); text-decoration: none;">pnmtv</a></em> <strong>= (NM_TREEVIEW FAR *)</strong> <em>lParam</em>
pnmtv
-
Pointer to an NM_TREEVIEW structure. The
itemNew member is a TVITEM structure that contains valid information about the parent item in the
hItem,
state, and
lParam members. The
action member indicates whether the list is to expand or collapse. For a list of possible values, see the description of the TVM_EXPAND message.
。。。。。。。。。
- typedef struct _NM_TREEVIEW {
- NMHDR hdr;
- UINT action;
- TV_ITEM itemOld;
- TV_ITEM itemNew;
- POINT ptDrag;
- } NM_TREEVIEW;
- typedef NM_TREEVIEW FAR* LPNM_TREEVIEW;
-
- typedef struct _TV_ITEM { tvi
- UINT mask;
- HTREEITEM hItem;
- UINT state;
- UINT stateMask;
- LPSTR pszText;
- int cchTextMax;
- int iImage;
- int iSelectedImage;
- int cChildren;
- LPARAM lParam; }
- TV_ITEM, FAR* LPTV_ITEM;
-
在 TV_ITEM 的 hItem中 存放着要展开项的句柄
解决:查了这么多,其实很简单 代码如下:
- void CLeftView::OnItemexpanding(NMHDR* pNMHDR, LRESULT* pResult)
- {
- LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR);
-
- HTREEITEM htree=pNMTreeView->itemNew.hItem;
-
- 。。。
- }
2 怎么知道CTreeCtrl的一个节点是展开的还是收缩着的
解决:
方法1
- <strong> (GetItemState(hItem, TVIS_EXPANDED )&TVIS_EXPANDED)!=TVIS_EXPANDED
方法2
响应TVN_ITEMEXPANDING事件时:
- void CExampleDlg::OnItemexpandingTree1(NMHDR* pNMHDR, LRESULT* pResult)
-
- {
-
- NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
-
- if (pNMTreeView->action == TVE_COLLAPSE)
-
- 。。。
-
- 。。。
-
- }
3 判断节点是否被扩展过
- if ((GetTreeCtrl().GetItemState(hItem,TVIS_EXPANDEDONCE )&TVIS_EXPANDEDONCE )!=0 )
4 使用 CImageList m_ImageList; 加载位图或图标,并将其与树控件联系在一起,由此便可以设置每个节点的图标
- CImageList m_ImageList;
- m_ImageList.Create(12,12,ILC_COLORDDB | ILC_MASK, 3, 1);
- HICON hAdd=::LoadIcon(::AfxGetInstanceHandle(), (LPCTSTR)IDI_ADD);
- HICON hRemove=::LoadIcon(::AfxGetInstanceHandle(), (LPCTSTR)IDI_REMOVE);
- HICON hLeaf=::LoadIcon(::AfxGetInstanceHandle(), (LPCTSTR)IDI_LEAF);
- m_ImageList.Add(hAdd);
- m_ImageList.Add(hRemove);
- m_ImageList.Add(hLeaf);
- GetTreeCtrl().SetImageList(&m_ImageList,TVSIL_NORMAL);
- m_treeCtrl.SetItemImage(htree,0,0)
5 什么时候响应OnItemexpanding 消息
当节点第一次被展开时,才响应此消息。也就是说:当以开后该节点再展开或收缩时,便不再响应此消息了。
6 设置树控件形式为 TVS_HASBUTTONS|TVS_LINESATROOT 时, 树控件节点前才会出现+ - 号
以下为综合例子: 点击按钮上一个 显示该节点的上一个兄弟节点,并更改控件焦点
设置控件样式:
- BOOL CTreePathView::PreCreateWindow(CREATESTRUCT& cs)
- {
- // TODO: 在此处通过修改
- // CREATESTRUCT cs 来修改窗口类或样式
-
- cs.style|=TVS_HASLINES|TVS_SHOWSELALWAYS; //若是想用CImageList的图标 ,则不要设置为TVS_HASBUTTONS形式
-
-
- return CTreeView::PreCreateWindow(cs);
- }
点击按钮5(焦点移动到上一个兄弟节点)
- void NewImageView::OnBnClickedButton5() // 上一个图
- {
- // TODO: 在此添加控件通知处理程序代码
-
- CTreePathView * pTree=(CTreePathView* )(((CMainFrame *)AfxGetMainWnd())->m_wndSplitter.GetPane(0,0));
-
- CTreeCtrl & treeCtrl=pTree->GetTreeCtrl();
-
- HTREEITEM hItem=treeCtrl.GetSelectedItem();
- if (hItem!=NULL)
- {
- hItem=treeCtrl.GetNextItem(hItem,TVGN_PREVIOUS);
-
- if (hItem!=NULL)
- {
- CString str;
- str=pTree->GetFullPath(hItem);
- SetImage(str);
- treeCtrl.SelectItem(hItem);
- treeCtrl.SetFocus();
- InvalidateRect(m_ClientRect);
- }
- }
- }
点击按钮6(焦点移动到下一个兄弟节点)
- void NewImageView::OnBnClickedButton6() //下一个
- {
- // TODO: 在此添加控件通知处理程序代码
-
- CTreePathView * pTree=(CTreePathView* )(((CMainFrame *)AfxGetMainWnd())->m_wndSplitter.GetPane(0,0));
- CTreeCtrl & treeCtrl=pTree->GetTreeCtrl();
- HTREEITEM hItem=treeCtrl.GetSelectedItem();
-
- if (hItem!=NULL)
- {
- hItem=treeCtrl.GetNextItem(hItem,TVGN_NEXT);
-
- if (hItem!=NULL)
- {
- CString str;
- str=pTree->GetFullPath(hItem);
- SetImage(str);
-
- treeCtrl.SelectItem(hItem);
- treeCtrl.SetFocus();
- InvalidateRect(m_ClientRect);
- }
- }
- }
7 遍历树控件的所有节点
1) 获得根节点句柄
- CTreeCtrl& nTreeCtrl=((CImportTreeView*)m_SplitterWnd.GetPane(0,0))->GetTreeCtrl();
-
- HTREEITEM hItem;
-
- hItem = nTreeCtrl.GetRootItem();
-
- TreeVisit(&nTreeCtrl,hItem);
2)遍历所有节点
- void TreeVisit(CTreeCtrl* pCtrl,HTREEITEM hItem)
- {
- if(pCtrl->ItemHasChildren(hItem))
- {
- HTREEITEM hChildItem = pCtrl->GetChildItem(hItem);
- while(hChildItem!=NULL)
- {
- TreeVisit(pCtrl,hChildItem);
- hChildItem = pCtrl->GetNextItem(hChildItem, TVGN_NEXT);
- }
- }
- else
- Leaf(pCtrl,hItem);
- }
8 获得某Item节点的全路径
- CString m_ParentFolder[10];
- CString m_OldParentFolder[10];
-
- BOOL AddParentFolder(CString nParentFolder[10], CString nParent)
- {
- for(int i=9;i>0;i--)
- nParentFolder[i]=nParentFolder[i-1];
- nParentFolder[0]=nParent;
- return TRUE;
- }
-
-
- CString AllCString(CString nParentFolder[10])
- {
- CString nAllCString=L"";
- for(int i=0;i<10;i++)
- {
- if(nParentFolder[i]==L"") break;
- nAllCString+=L"\\"+nParentFolder[i];
- }
- return nAllCString;
- }
获得Item节点路径的函数
- CString GetItemPath(CTreeCtrl* pCtrl,HTREEITEM hItem)
- {
- CString nSelItemName=pCtrl->GetItemText(hItem);
-
- HTREEITEM parentItem=pCtrl->GetParentItem(hItem);
-
- if (parentItem==NULL)
- return nSelItemName;
-
-
- for(int i=0;i<10;i++) m_OldParentFolder[i]=L"";
-
-
- for(int i=0;i<10;i++)
- m_OldParentFolder[i]=m_ParentFolder[i];
-
-
- for(int i=0;i<10;i++)
- m_ParentFolder[i]=L"";
-
- CString itemPath;
- CString parentFolder=nSelItemName;
-
-
- AddParentFolder(m_ParentFolder,parentFolder);
-
-
-
-
- while(parentItem!=NULL&&pCtrl->GetItemText(parentItem).Compare(m_PicFolder))
- {
- parentFolder=pCtrl->GetItemText(parentItem);
- AddParentFolder(m_ParentFolder,parentFolder);
- parentItem=pCtrl->GetParentItem(parentItem);
-
- }
-
- itemPath.Format(L"%s%s",m_PicFolder,AllCString(m_ParentFolder));
-
-
- for(int i=0;i<10;i++) m_OldParentFolder[i]=L"";
-
- for(int i=0;i<10;i++)
- m_ParentFolder[i]=L"";
-
- return itemPath;
-
- }
获得叶子节点的函数
- void Leaf(CTreeCtrl* pCtrl,HTREEITEM hItem)
- {
-
- CString itemName=pCtrl->GetItemText(hItem);
-
-
- if(nSelItemName.Find(L".jpg")!=-1 || nSelItemName.Find(L".tif")!=-1)
- {
-
-
- for(int i=0;i<10;i++)
- m_OldParentFolder[i]=m_ParentFolder[i];
-
-
- for(int i=0;i<10;i++)
- m_ParentFolder[i]=L"";
-
- CString imgPath=L"";
- CString parentFolder=itemName;
-
-
- AddParentFolder(m_ParentFolder,parentFolder);
-
- HTREEITEM parentItem=pCtrl->GetParentItem(hItem);
-
-
- while(pCtrl->GetItemText(parentItem).Compare(m_imgPath))
- {
- parentFolder=pCtrl->GetItemText(parentItem);
- AddParentFolder(m_ParentFolder,parentFolder);
- parentItem=pCtrl->GetParentItem(parentItem)
-
- }
-
-
- imgPath.Format(L"%s%s",m_imgPath,AllCString(m_ParentFolder));
-
- }
-
-
-
- ShowPic(imgPath);
-
-
- }
上述方法过于繁杂,再来了简洁些的
使用栈,依次将本节点-->根节点入栈 出栈时顺序便为根节点-->本节点
1)叶子节点
-
- void CMainFrame::PostPath(CTreeCtrl& nTreeCtrl, HTREEITEM hItem,CString &path)
- {
- stack<HTREEITEM> itemStack;
- while (hItem!=nTreeCtrl.GetRootItem ())
- {
- itemStack.push(hItem);
- hItem=nTreeCtrl.GetParentItem (hItem);
- }
- itemStack.push(nTreeCtrl.GetRootItem ());
- CString itemName;
- while (!itemStack.empty())
- {
- hItem=(HTREEITEM)itemStack.top();
- itemStack.pop();
- itemName=nTreeCtrl.GetItemText (hItem);
- path+=itemName;
- path+=L"\\";
- }
- path.TrimRight(L"\\");
- path+=L".xml";
- }
2)目录节点
- void CMainFrame::DirPath(CTreeCtrl& nTreeCtrl, HTREEITEM nRoot,CString &path)
- {
- stack<HTREEITEM> itemStack;
- while (hItem!=nTreeCtrl.GetRootItem ())
- {
- itemStack.push(hItem);
- hItem=nTreeCtrl.GetParentItem (hItem);
- }
- itemStack.push(nTreeCtrl.GetRootItem ());
- CString itemName;
- while (!itemStack.empty())
- {
- hItem=(HTREEITEM)itemStack.top();
- itemStack.pop();
- itemName=nTreeCtrl.GetItemText (hItem);
- path+=itemName;
- path+=L"\\";
- }
- }
9 获得树中所有叶子节点的父目录
即:树中可能有许多枝干,获取这些枝干的路径
- std::vector<CString> m_BookDirectory;
- void GetBookDirectory(CTreeCtrl* pCtrl,HTREEITEM hItem)
- {
-
- if(pCtrl->ItemHasChildren(hItem))
- {
- HTREEITEM hChildItem = pCtrl->GetChildItem(hItem);
- while(hChildItem!=NULL)
- {
- GetBookDirectory(pCtrl,hChildItem);
-
- if(pCtrl->ItemHasChildren(hChildItem))
- hChildItem = pCtrl->GetNextItem(hChildItem, TVGN_NEXT);
- else
- break;
- }
- }
- else
- {
- HTREEITEM parentItem=pCtrl->GetParentItem(hItem);
- CString bookPath=GetItemPath(pCtrl,parentItem);
-
- m_BookDirectory.push_back(bookPath);
-
- }
- }
- CTreeCtrl& nTreeCtrl=((CImportTreeView*)m_SplitterWnd.GetPane(0,0))->GetTreeCtrl();
- HTREEITEM hItem;
- hItem = nTreeCtrl.GetRootItem();
-
- m_BookDirectory.clear();
- GetBookDirectory(&nTreeCtrl,hItem);
10 利用InsertItem、SetItemData 存放与该节点有关的数字信息
- HTREEITEM InsertItem(
- LPCTSTR lpszItem,
- int nImage,
- int nSelectedImage,
- HTREEITEM hParent = TVI_ROOT,
- HTREEITEM hInsertAfter = TVI_LAST
- );
-
存放65535以上的大数据时 用SetItemData
A 32-bit application-specific value
- BOOL SetItemData(
- HTREEITEM hItem,
- DWORD_PTR dwData
- );
-
运用实例:
古典书屋软件--内含大量古典小说 使用的便是CTreeCtrl这个控件
下载链接:古典书屋软件下载——喜欢古典小说的不要错过奥