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作者:刘涛 来源:天极开发 2007年10月16日
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// XTreeCtrl.h : header file #if !defined(AFX_XTREECTRL_H__3EF12526_EF66_4FD9_A572_59476441D79A__INCLUDED_) #define AFX_XTREECTRL_H__3EF12526_EF66_4FD9_A572_59476441D79A__INCLUDED_ #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 class CXTreeCtrl : public CTreeCtrl { // Construction public: CXTreeCtrl(); // Attributes public: // Operations public: // Overrides // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CXTreeCtrl) //}}AFX_VIRTUAL // Implementation public: virtual ~CXTreeCtrl(); // Generated message map functions protected: UINT m_TimerTicks; //处理滚动的定时器所经过的时间 UINT m_nScrollTimerID; //处理滚动的定时器 CPoint m_HoverPoint; //鼠标位置 UINT m_nHoverTimerID; //鼠标敏感定时器 DWORD m_dwDragStart; //按下鼠标左键那一刻的时间 BOOL m_bDragging; //标识是否正在拖动过程中 CImageList* m_pDragImage; //拖动时显示的图象列表 HTREEITEM m_hItemDragS; //被拖动的标签 HTREEITEM m_hItemDragD; //接受拖动的标签 //{{AFX_MSG(CXTreeCtrl) afx_msg void OnBegindrag(NMHDR* pNMHDR, LRESULT* pResult); afx_msg void OnMouseMove(UINT nFlags, CPoint point); afx_msg void OnLButtonUp(UINT nFlags, CPoint point); afx_msg void OnLButtonDown(UINT nFlags, CPoint point); afx_msg void OnTimer(UINT nIDEvent); //}}AFX_MSG DECLARE_MESSAGE_MAP() private: HTREEITEM CopyBranch(HTREEITEM htiBranch,HTREEITEM htiNewParent,HTREEITEM htiAfter); HTREEITEM CopyItem(HTREEITEM hItem,HTREEITEM htiNewParent,HTREEITEM htiAfter); }; #endif //////////////////////////////////////////////////////////// CXTreeCtrl #include "stdafx.h" #include "DragTree.h" #include "XTreeCtrl.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif #define DRAG_DELAY 60 CXTreeCtrl::CXTreeCtrl() { m_bDragging = false; } CXTreeCtrl::~CXTreeCtrl() {} BEGIN_MESSAGE_MAP(CXTreeCtrl, CTreeCtrl) //{{AFX_MSG_MAP(CXTreeCtrl) ON_NOTIFY_REFLECT(TVN_BEGINDRAG, OnBegindrag) ON_WM_MOUSEMOVE() ON_WM_LBUTTONUP() ON_WM_LBUTTONDOWN() ON_WM_TIMER() //}}AFX_MSG_MAP END_MESSAGE_MAP() void CXTreeCtrl::OnBegindrag(NMHDR* pNMHDR, LRESULT* pResult) { NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR; *pResult = 0; //如果是无意拖曳,则放弃操作 if( (GetTickCount() - m_dwDragStart) < DRAG_DELAY ) return; m_hItemDragS = pNMTreeView->itemNew.hItem; m_hItemDragD = NULL; //得到用于拖动时显示的图象列表 m_pDragImage = CreateDragImage( m_hItemDragS ); if( !m_pDragImage ) return; m_bDragging = true; m_pDragImage->BeginDrag ( 0,CPoint(8,8) ); CPoint pt = pNMTreeView->ptDrag; ClientToScreen( &pt ); m_pDragImage->DragEnter ( this,pt ); //"this"将拖曳动作限制在该窗口 SetCapture(); m_nScrollTimerID = SetTimer( 2,40,NULL ); } void CXTreeCtrl::OnMouseMove(UINT nFlags, CPoint point) { HTREEITEM hItem; UINT flags; //检测鼠标敏感定时器是否存在,如果存在则删除,删除后再定时 if( m_nHoverTimerID ) { KillTimer( m_nHoverTimerID ); m_nHoverTimerID = 0; } m_nHoverTimerID = SetTimer( 1,800,NULL ); //定时为 0.8 秒则自动展开 m_HoverPoint = point; if( m_bDragging ) { CPoint pt = point; CImageList::DragMove( pt ); //鼠标经过时高亮显示 CImageList::DragShowNolock( false ); //避免鼠标经过时留下难看的痕迹 if( (hItem = HitTest(point,&flags)) != NULL ) { SelectDropTarget( hItem ); m_hItemDragD = hItem; } CImageList::DragShowNolock( true ); //当条目被拖曳到左边缘时,将条目放在根下 CRect rect; GetClientRect( &rect ); if( point.x < rect.left + 20 ) m_hItemDragD = NULL; } CTreeCtrl::OnMouseMove(nFlags, point); } void CXTreeCtrl::OnLButtonUp(UINT nFlags, CPoint point) { CTreeCtrl::OnLButtonUp(nFlags, point); if( m_bDragging ) { m_bDragging = FALSE; CImageList::DragLeave( this ); CImageList::EndDrag(); ReleaseCapture(); delete m_pDragImage; SelectDropTarget( NULL ); if( m_hItemDragS == m_hItemDragD ) { KillTimer( m_nScrollTimerID ); return; } Expand( m_hItemDragD,TVE_EXPAND ); HTREEITEM htiParent = m_hItemDragD; while( (htiParent = GetParentItem(htiParent)) != NULL ) { if( htiParent == m_hItemDragS ) { HTREEITEM htiNewTemp = CopyBranch( m_hItemDragS,NULL,TVI_LAST ); HTREEITEM htiNew = CopyBranch( htiNewTemp,m_hItemDragD,TVI_LAST ); DeleteItem( htiNewTemp ); SelectItem( htiNew ); KillTimer( m_nScrollTimerID ); return; } } HTREEITEM htiNew = CopyBranch( m_hItemDragS,m_hItemDragD,TVI_LAST ); DeleteItem( m_hItemDragS ); SelectItem( htiNew ); KillTimer( m_nScrollTimerID ); } } HTREEITEM CXTreeCtrl::CopyItem(HTREEITEM hItem, HTREEITEM htiNewParent, HTREEITEM htiAfter) //拷贝条目 { TV_INSERTSTRUCT tvstruct; HTREEITEM hNewItem; CString sText; //得到源条目的信息 tvstruct.item.hItem = hItem; tvstruct.item.mask=TVIF_CHILDREN|TVIF_HANDLE|TVIF_IMAGE|TVIF_SELECTEDIMAGE; GetItem( &tvstruct.item ); sText = GetItemText( hItem ); tvstruct.item.cchTextMax = sText.GetLength (); tvstruct.item.pszText = sText.LockBuffer (); //将条目插入到合适的位置 tvstruct.hParent = htiNewParent; tvstruct.hInsertAfter = htiAfter; tvstruct.item.mask = TVIF_IMAGE|TVIF_SELECTEDIMAGE|TVIF_TEXT; hNewItem = InsertItem( &tvstruct ); sText.ReleaseBuffer (); //限制拷贝条目数据和条目状态 SetItemData( hNewItem,GetItemData(hItem) ); SetItemState( hNewItem,GetItemState(hItem,TVIS_STATEIMAGEMASK),TVIS_STATEIMAGEMASK); return hNewItem; } HTREEITEM CXTreeCtrl::CopyBranch(HTREEITEM htiBranch, HTREEITEM htiNewParent, HTREEITEM htiAfter) //拷贝分支 { HTREEITEM hChild; HTREEITEM hNewItem = CopyItem( htiBranch,htiNewParent,htiAfter ); hChild = GetChildItem( htiBranch ); while( hChild != NULL ) { CopyBranch( hChild,hNewItem,htiAfter ); hChild = GetNextSiblingItem( hChild ); } return hNewItem; } void CXTreeCtrl::OnLButtonDown(UINT nFlags, CPoint point) //处理无意拖曳 { m_dwDragStart = GetTickCount(); CTreeCtrl::OnLButtonDown(nFlags, point); } void CXTreeCtrl::OnTimer(UINT nIDEvent) { //鼠标敏感节点 if( nIDEvent == m_nHoverTimerID ) { KillTimer( m_nHoverTimerID ); m_nHoverTimerID = 0; HTREEITEM trItem = 0; UINT uFlag = 0; trItem = HitTest( m_HoverPoint,&uFlag ); if( trItem && m_bDragging ) { SelectItem( trItem ); Expand( trItem,TVE_EXPAND ); } } //处理拖曳过程中的滚动问题 else if( nIDEvent == m_nScrollTimerID ) { m_TimerTicks++; CPoint pt; GetCursorPos( &pt ); CRect rect; GetClientRect( &rect ); ClientToScreen( &rect ); HTREEITEM hItem = GetFirstVisibleItem(); if( pt.y < rect.top +10 ) { //向上滚动 int slowscroll = 6 - (rect.top + 10 - pt.y )/20; if( 0 == (m_TimerTicks % ((slowscroll > 0) ? slowscroll : 1)) ) { CImageList::DragShowNolock ( false ); SendMessage( WM_VSCROLL,SB_LINEUP ); SelectDropTarget( hItem ); m_hItemDragD = hItem; CImageList::DragShowNolock ( true ); } } else if( pt.y > rect.bottom - 10 ) { //向下滚动 int slowscroll = 6 - (pt.y - rect.bottom + 10)/20; if( 0 == (m_TimerTicks % ((slowscroll > 0) ? slowscroll : 1)) ) { CImageList::DragShowNolock ( false ); SendMessage( WM_VSCROLL,SB_LINEDOWN ); int nCount = GetVisibleCount(); for( int i=0 ; i<nCount-1 ; i++ ) hItem = GetNextVisibleItem( hItem ); if( hItem ) SelectDropTarget( hItem ); m_hItemDragD = hItem; CImageList::DragShowNolock ( true ); } } } else CTreeCtrl::OnTimer(nIDEvent); } //////////////////////////////////////////////////////////// BOOL CDragTreeDlg::OnInitDialog() { CDialog::OnInitDialog(); …………………….//此处代码省略 // TODO: Add extra initialization here m_image.Create ( IDB_TREEIMAGE,16,1,RGB(255,255,255) ); m_wndTree.SetImageList ( &m_image,TVSIL_NORMAL ); HTREEITEM hti1 = m_wndTree.InsertItem ( _T("唐詩"),0,1 ); HTREEITEM hti2 = m_wndTree.InsertItem ( _T("宋詞"),0,1 ); HTREEITEM hti3 = m_wndTree.InsertItem ( _T("元曲"),0,1 ); HTREEITEM hti4 = m_wndTree.InsertItem ( _T("李白"),0,1,hti1 ); m_wndTree.InsertItem ( _T("靜夜思(床前明月光)"),0,1,hti4 ); m_wndTree.InsertItem ( _T("將進酒(君不見黃河之水天上來)"),0,1,hti4 ); m_wndTree.InsertItem ( _T("望廬山瀑布(日照香爐生紫煙)"),0,1,hti4 ); m_wndTree.InsertItem ( _T("蜀道難(噫吁戲,危乎高哉)"),0,1,hti4 ); HTREEITEM hti5 = m_wndTree.InsertItem ( _T("杜甫"),0,1,hti1 ); m_wndTree.InsertItem ( _T("蜀相(丞相祠堂何處尋)"),0,1,hti5 ); m_wndTree.InsertItem ( _T("春望(國破山河在)"),0,1,hti5 ); m_wndTree.InsertItem ( _T("茅屋為秋風所破歌(八月秋高風怒號)"),0,1,hti5 ); HTREEITEM hti6 = m_wndTree.InsertItem ( _T("白居易"),0,1,hti1 ); m_wndTree.InsertItem ( _T("長恨歌(漢皇重色思傾國)"),0,1,hti6 ); m_wndTree.InsertItem ( _T("琵琶行並序(潯陽江頭夜送客)"),0,1,hti6 ); m_wndTree.InsertItem ( _T("李清照"),0,1,hti2 ); m_wndTree.InsertItem ( _T("柳永"),0,1,hti2 ); return TRUE; // return TRUE unless you set the focus to a control } |
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