基于MFC的小游戏中鼠标拖拽图片的头文件和cpp文件

以下是一个基于 MFC 的小游戏中鼠标拖拽图片的头文件和 cpp 文件的示例：

头文件 DragImage.h：

#pragma once

class CDragImage : public CStatic
{
public:
    CDragImage();
    virtual ~CDragImage();

    BOOL LoadImage(UINT uResID);
    void SetDropTarget(CWnd* pTarget);
    void SetDragCursor(HCURSOR hCursor);
    void SetDragImageOffset(CPoint ptOffset);

protected:
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
    DECLARE_MESSAGE_MAP()

private:
    CBitmap m_bitmap;
    CWnd* m_pDropTarget;
    HCURSOR m_hCursor;
    CPoint m_ptOffset;
    BOOL m_bDragging;
};

cpp 文件 DragImage.cpp：

#include "stdafx.h"
#include "DragImage.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

IMPLEMENT_DYNAMIC(CDragImage, CStatic)

BEGIN_MESSAGE_MAP(CDragImage, CStatic)
    ON_WM_LBUTTONDOWN()
    ON_WM_MOUSEMOVE()
    ON_WM_LBUTTONUP()
END_MESSAGE_MAP()

CDragImage::CDragImage()
    : m_pDropTarget(NULL)
    , m_hCursor(NULL)
    , m_bDragging(FALSE)
{
}

CDragImage::~CDragImage()
{
}

BOOL CDragImage::LoadImage(UINT uResID)
{
    HBITMAP hBitmap = (HBITMAP)::LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(uResID), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
    if (hBitmap == NULL)
    {
        return FALSE;
    }

    m_bitmap.Attach(hBitmap);
    SetBitmap(hBitmap);

    return TRUE;
}

void CDragImage::SetDropTarget(CWnd* pTarget)
{
    m_pDropTarget = pTarget;
}

void CDragImage::SetDragCursor(HCURSOR hCursor)
{
    m_hCursor = hCursor;
}

void CDragImage::SetDragImageOffset(CPoint ptOffset)
{
    m_ptOffset = ptOffset;
}

void CDragImage::OnLButtonDown(UINT nFlags, CPoint point)
{
    if (m_bitmap.GetSafeHandle() == NULL)
    {
        return;
    }

    m_bDragging = TRUE;

    CRect rect;
    GetWindowRect(&rect);

    CDC* pDC = GetDC();
    CDC memDC;
    memDC.CreateCompatibleDC(pDC);
    CBitmap* pOldBitmap = memDC.SelectObject(&m_bitmap);

    CPoint ptImage(point - rect.TopLeft() - m_ptOffset);

    if (m_hCursor != NULL)
    {
        ::SetCursor(m_hCursor);
    }

    if (m_pDropTarget != NULL)
    {
        m_pDropTarget->SetCapture();
    }

    if (::ImageList_BeginDrag(NULL, 0, 0, 0))
    {
        ::ImageList_AddMasked(NULL, m_bitmap, RGB(255, 0, 255));
        ::ImageList_DragEnter(NULL, point.x, point.y);
        ::ImageList_DragMove(point.x, point.y);
    }

    memDC.SelectObject(pOldBitmap);
    ReleaseDC(pDC);
}

void CDragImage::OnMouseMove(UINT nFlags, CPoint point)
{
    if (m_bDragging)
    {
        if (m_hCursor != NULL)
        {
            ::SetCursor(m_hCursor);
        }

        if (::ImageList_DragMove(point.x, point.y))
        {
            if (m_pDropTarget != NULL)
            {
                CRect rect;
                m_pDropTarget->GetWindowRect(&rect);
                if (rect.PtInRect(point))
                {
                    ::ImageList_DragEnter(m_pDropTarget->GetSafeHwnd(), point.x, point.y);
                }
                else
                {
                    ::ImageList_DragLeave(m_pDropTarget->GetSafeHwnd());
                }
            }
        }
    }
}

void CDragImage::OnLButtonUp(UINT nFlags, CPoint point)
{
    if (m_bDragging)
    {
        if (::ImageList_DragLeave(NULL))
        {
            if (m_pDropTarget != NULL)
            {
                CRect rect;
                m_pDropTarget->GetWindowRect(&rect);
                if (rect.PtInRect(point))
                {
                    ::ImageList_DragEnter(m_pDropTarget->GetSafeHwnd(), point.x, point.y);
                    ::ImageList_Drop(m_pDropTarget->GetSafeHwnd(), point);
                }
            }
        }

        if (m_pDropTarget != NULL)
        {
            m_pDropTarget->ReleaseCapture();
        }

        ::ImageList_EndDrag();
        m_bDragging = FALSE;
    }
}

注意：该示例代码仅供参考，请根据自己的实际需求进行修改和调整。