VC 树控件的拖拽实现 MFC

只需要将你的树控件类型改成CXTreeCtrl，并将以下头文件：XTreeCtrl.h和实现文件：XTreeCtrl.cpp包含进你的工程。

然后在void CXTreeCtrl::OnLButtonUp(UINT nFlags, CPoint point)这个函数中加入你自己的响应代码，即可完成树控件的拖拽效果。

//XTreeCtrl.h

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#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();

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

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