• MFC如何在树形图边上添加动态小地图


    MFC如何在树形图边上添加动态小地图

    https://www.jianshu.com/p/7b1d828bf5db (简书无法识别缩进的。。。早知道先在博客园发了)

    (转载请注明出处)

    作者:梦镜谷雨


    萌新第一次写文章,请多多包涵。末尾附上相应代码(PS公司繁体系统所以部分注释繁体请别介意)。

    第一次接触MFC时做的一个小项目上有做个树形图边上带小地图的需求。(IDE:VS2010)

    大四刚实习时写的,当时网上没找到现成的,打算记录下来也算篇技术谈不上的思路吧。

    快2019了打算开始试着以后多记录点东西,因为本人大学微电子专业不是软件方向想往这边发展的,代码里东西这时文章写到一半自己看着都感觉很糟糕(╯﹏╰),也算是记录个黑历史吧能实现功但糟糕就是糟糕。当时第一次学自绘没想着要写文章记录下来,参考了些网上教树形图自绘好像csdn看的但链接没记现在也忘了当时是参考哪一个了。在此感谢加抱歉。


    一.思路:

    Step1.自绘树形图控件(在树形图文字左边显示CImagelist里的图片)

    Step2.创建个CBitmap动态保存需要的图片信息存入树形图关联的CImagelist中

    二.最终效果(使用60*60符文3):

    在画板上的改变(60*60符文3)能动态反映到左边树形图控件的对应项目(60*60符文3)上

    三.重绘(我就多添加注释吧在注释里讲解。思路很简单):

    1.创建个类CViewTree继承自CTreeCtrl

    2.重载OnPaint使用双缓冲(防闪烁,双缓冲原理网上很多,后面创建小地图也是同个思路)

    /*雙緩衝重繪樹形圖*/

    void CViewTree::OnPaint()

    {

        CLED_NEWDoc* pDoc =(CLED_NEWDoc*)((CMainFrame*)AfxGetApp()->GetMainWnd())->GetActiveDocument();//以为单文档工程有些东西存在doc里

        CPaintDC dc(this); // device context for painting

        // TODO: 重绘树形图控件

        // Do not call CTreeCtrl::OnPaint() for painting messages

        GetClientRect(&m_ClientRect);

        CBitmap bitmap;

        CDC MemeDc;

        MemeDc.CreateCompatibleDC(&dc);

        bitmap.CreateCompatibleBitmap(&dc, m_ClientRect.Width(), m_ClientRect.Height());

        CBitmap *pOldBitmap = MemeDc.SelectObject(&bitmap);

        //繪圖部分

        MemeDc.FillSolidRect(0, 0,m_ClientRect.Width(),m_ClientRect.Height(),RGB(255, 255, 255)); //填充背景

        if (pDoc->m_CsFileName != _T(""))//如果有打開文件則可以畫樹形圖

            DrawItem(&MemeDc);

        //繪圖部分

        dc.BitBlt( m_ClientRect.left, m_ClientRect.top, m_ClientRect.Width(), m_ClientRect.Height(), &MemeDc, 0, 0,SRCCOPY);

        MemeDc.SelectObject(pOldBitmap);

        MemeDc.DeleteDC();

    }

    3.画显示的项目

    void CViewTree::DrawItem(CDC* pDc)

    {

        CLED_NEWDoc* pDoc =(CLED_NEWDoc*)((CMainFrame*)AfxGetApp()->GetMainWnd())->GetActiveDocument();

        HTREEITEM currentItem;//当前的句柄

        DWORD    treeStyle;// 数的类型

        CRect    itemRect;//每一项的区域

        int      itemState;//某项的状态

        int itemImage;//圖片

        int     Open_num=0;

        int HScroll = GetScrollPos(SB_HORZ);

        CImageList* imagelist = GetImageList(TVSIL_NORMAL);

        treeStyle =:: GetWindowLong( m_hWnd, GWL_STYLE );

        currentItem = GetFirstVisibleItem();//获取第一个课可见的项

        //設置顯示字體

        static CFont font;

        font.DeleteObject();

        font.CreatePointFont(100, _T("新宋体"));

        pDc->SelectObject(&font);

        do //beginwhile ((currentItem=GetNextVisibleItem(currentItem)) != NULL);

        {

            Open_num++;

            //判斷是否為選擇狀態

            if (Open_num + GetScrollPos(SB_VERT) == ((CMainFrame*)AfxGetApp()->GetMainWnd())->m_wndMaskView.Select)//选中是第几个数存在MaskView的Select里

                pDc->SetBkColor(RGB(233,233,233));

            else

                pDc->SetBkColor(RGB(255,255,255));

            CRect   fillRect(0,itemRect.top,m_ClientRect.right,itemRect.bottom);//填背景用的后来没删

            itemState = GetItemState(currentItem,TVIF_STATE);

            //每一項的位置和圖片

            GetItemImage(currentItem,itemImage,itemImage);

            GetItemRect(currentItem,itemRect,FALSE);

            CPoint point;

            point.y = itemRect.top;

            point.x = itemRect.left-HScroll+(GetLevel(currentItem)-1)*42;//(以前写的时候多次用上的数字都没#define成英文。很糟糕,建议养成习惯)

            if (itemRect.top>m_ClientRect.bottom)  //说明这一项已超出窗口的边界

            {

                break;

            }

            if ( GetChildItem(currentItem) != NULL )

            {

                if (ItemHasChildren(currentItem))//有子項則畫上對應三角形圖標

                {

                    if (itemState & TVIS_EXPANDED )

                    {

                        imagelist->Draw(pDc,1,point,ILD_TRANSPARENT);

                    }

                    else

                    {

                        imagelist->Draw(pDc,0,point,ILD_TRANSPARENT);

                    }

                }

            }else{//無子項則畫上對應imagelist圖片

            //imagelist->Draw(pDc,3,point,ILD_TRANSPARENT);

            point.x = point.x + 50;

            imagelist->Draw(pDc,itemImage,point,ILD_TRANSPARENT);

            point.x = point.x - 50;

        }

        if ( GetLevel(currentItem) != 3 )//項目不為第三層就加藍色文件夾圖標

        {

            point.x = point.x + 42;

            point.y = point.y + 5;

            pDc->DrawIcon(point,AfxGetApp()->LoadIcon(IDI_ICON_PROJECT));//因為存imagelist無法有透明效果(现在这个能自己能花式解决吧。以前写的真糟糕,但是因为提供的是ICON资源载入到imagelist分辨率降了很多,看他只有一张于是就直接画了)

            point.x = point.x - 42;

            point.y = point.y - 5;

        }

        GetItemRect(currentItem,itemRect,TRUE);

        if (Open_num == ((CMainFrame*)AfxGetApp()->GetMainWnd())->m_wndMaskView.Rename && pDoc->m_bFlagRenameShow == TRUE);

        else

            pDc->TextOut(itemRect.left ,itemRect.top+itemRect.Height()/2-6,GetItemText(currentItem));//输出树形图的文字

        }while ((currentItem=GetNextVisibleItem(currentItem)) != NULL);

    }//好了到此为止,以下不重要可以直接看四.

    //现在忘了为什么加这个

    BOOL CViewTree::OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult)

    {

        // TODO: Add your specialized code here and/or call the base class

        return CTreeCtrl::OnWndMsg(message, wParam, lParam, pResult);

    }

    //这个现在也忘记了为什么加了

    BOOL CViewTree::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)

    {

        BOOL bRes = CTreeCtrl::OnNotify(wParam, lParam, pResult);

        NMHDR* pNMHDR = (NMHDR*)lParam;

        ASSERT(pNMHDR != NULL);

        if (pNMHDR && pNMHDR->code == TTN_SHOW && GetToolTips() != NULL)

        {

            GetToolTips()->SetWindowPos(&wndTop, -1, -1, -1, -1, SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOSIZE);

        }

        return bRes;

    }

    //不要擦除背景,会闪烁

    BOOL CViewTree::OnEraseBkgnd(CDC* pDC)

    {

        // TODO: Add your message handler code here and/or call default

        return TRUE;

    }

    //滚动时当然要刷新

    void CViewTree::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)

    {

        // TODO: Add your message handler code here and/or call default

        Invalidate();

        CTreeCtrl::OnVScroll(nSBCode, nPos, pScrollBar);

    }

    //搬的砖,放在里面方便用

    int CViewTree::GetLevel(HTREEITEM inputTree)

    {

        //獲得Item所在樹形圖層數

        HTREEITEM temp;

        temp = inputTree;

        int level = 0;

        while (temp != NULL)

        {

            temp = GetParentItem(temp);

            ++level;

        }

        return level;

    }

    四.创建CBitmap存入CImagelist(那时存class CMaskView : public CDockablePane):

    创建自绘的树形图:CViewTree m_wndFileView;

    创建图片列表:CImageList m_FileViewImages;

    1.创建树形图

    //vs创建单文档工程造着里面来就好了,树形图类相关操作msdn里面自查CTreeCtrl,添加删除重命名什么的网上很多就不写了

    if (!m_wndFileView.Create(dwViewStyle, rectDummy, this, 4))

    {

        TRACE0("Failed to create file view ");

        return -1;      // fail to create

    }//调整位置大小也是vs新建单文档工程时有悬浮窗就有看vs吧

    2.创建图片并填充(在画树形图时每个项对应上Imagelist里的相应项就OK了)

    void CMaskView::FillTreeImage()

    {

    /***********************///(和双缓冲同个思路,诶,现在看起来能写的简单整洁多的,怪当时理解不深,真糟糕)

        CLED_NEWDoc* pDoc =(CLED_NEWDoc*)((CMainFrame*)AfxGetApp()->GetMainWnd())->GetActiveDocument();

        CDC MemDC,MemDC2;

        CDC * pDC;

        CDC * pDC2;

        pDC =GetDC();

        pDC2=GetDC();

        HTREEITEM hItem;

        CBitmap bmp,bmp2;

        UINT nFlags = ILC_MASK;

        nFlags |= (theApp.m_bHiColorIcons) ? ILC_COLOR24 : ILC_COLOR4;

        m_imagelist.DeleteImageList();//清除图片列表

        m_imagelist.Create(m_iImageSize,m_iImageSize,nFlags,0,300);//创建图片列表

        //m_wndFileView.SetImageList(&pDoc->m_imagelist, TVSIL_NORMAL);

        MemDC.CreateCompatibleDC(pDC);

        bmp.CreateCompatibleBitmap(pDC,60,60);

        MemDC.SelectObject(&bmp);    

        MemDC2.CreateCompatibleDC(pDC2);

        bmp2.CreateCompatibleBitmap(pDC2,m_iImageSize,m_iImageSize);

        MemDC2.SelectObject(&bmp2);

        MemDC.FillSolidRect(0,0,pDoc->SymImage.m_Column,pDoc->SymImage.m_Row,RGB(255, 255, 255));

        /*/畫十字(未展開狀態圖標)

        MemDC2.FillSolidRect(0,0,m_iImageSize,m_iImageSize,RGB(255, 255, 255));

        MemDC2.FillSolidRect(m_iImageSize/2-10,m_iImageSize/2-1,20,2,RGB(0, 0, 0));

        MemDC2.FillSolidRect(m_iImageSize/2-1,m_iImageSize/2-10,2,20,RGB(0, 0, 0));

        m_imagelist.Add(&bmp2,RGB(255, 255, 255));

        */

        //90度直角三角形

        int start = m_iImageSize/3,end = m_iImageSize*2/3;

        int H = m_iImageSize/2,mid = m_iImageSize/2;

        int x,y;

        MemDC2.FillSolidRect(0,0,m_iImageSize,m_iImageSize,RGB(255, 255, 255));

        for (x = 0;x<m_iImageSize;x++)

            for (y = 0;y<m_iImageSize;y++)

                if(x>start && (x-start) < (y - mid + H/2) && -(x-start) > (y - mid - H/2))

                    MemDC2.SetPixel(x,y,RGB(0, 0, 0));

        m_imagelist.Add(&bmp2,RGB(255, 255, 255));

        /*/畫減號(展開狀態圖標)

        MemDC2.FillSolidRect(0,0,m_iImageSize,m_iImageSize,RGB(255, 255, 255));

        MemDC2.FillSolidRect(m_iImageSize/2-10,m_iImageSize/2-1,20,2,RGB(0, 0, 0));

        m_imagelist.Add(&bmp2,RGB(255, 255, 255));

        */

        //135直角三角形

        MemDC2.FillSolidRect(0,0,m_iImageSize,m_iImageSize,RGB(255, 255, 255));

        for (x = 0;x<m_iImageSize;x++)

            for (y = 0;y<m_iImageSize;y++)

                if(x < mid + 7*H/20 && y < mid + 7*H/20 && -(x - mid - 7*H/20) < y - mid + 7*H/20)

                    MemDC2.SetPixel(x,y,RGB(0, 0, 0));

        m_imagelist.Add(&bmp2,RGB(255, 255, 255));

        //涂白(未含有子顯圖標)

        MemDC2.FillSolidRect(0,0,m_iImageSize,m_iImageSize,RGB(255, 255, 255));

        m_imagelist.Add(&bmp2,RGB(255, 255, 255));

        HICON hIcon[2];

        hIcon[0] = AfxGetApp()->LoadIcon(IDI_ICON_FILE_SE);

        m_imagelist.Add(hIcon[0]);

        //bmp.LoadBitmapW(IDB_BITMAP_F1);

        hIcon[1] = AfxGetApp()->LoadIcon(IDI_ICON_PROJECT);

        m_imagelist.Add(hIcon[1]);

        //給樹形圖對應imagelist插入自畫的圖片并設置每個項的對應

        int n = 4;

        hItem = m_wndFileView.GetRootItem();

        hItem = m_wndFileView.GetChildItem(hItem);

        while (hItem != NULL)//几个判断判断是否是第3层,因为当时只有第三层需要小地图,扫描他们

        {

            if(m_wndFileView.GetChildItem(hItem) != NULL)

            {

                hItem = m_wndFileView.GetChildItem(hItem);

                while (hItem != NULL)

                {

                    n++;

                    CString name;

                    name = m_wndFileView.GetItemText(hItem);

                    CString ParentItemName = m_wndFileView.GetItemText(m_wndFileView.GetParentItem(hItem));

                    if (ParentItemName == _T("5*8"))

                        pDoc->SymImage = pDoc->m_Array_List_Sym[pDoc->Finding_Sym_limit(name,5,8)];

                    else if (ParentItemName == _T("16*16"))

                        pDoc->SymImage = pDoc->m_Array_List_Sym[pDoc->Finding_Sym_limit(name,16,16)];

                    else if (ParentItemName == _T("32*32"))

                        pDoc->SymImage = pDoc->m_Array_List_Sym[pDoc->Finding_Sym_limit(name,32,32)];

                    else if

                        (ParentItemName == _T("其他") || ParentItemName == _T("Other"))

                    pDoc->SymImage = pDoc->m_Array_List_Sym[pDoc->Finding_Sym_for_another(name)];

                    //給圖片刷新背景

                    MemDC.FillSolidRect(0,0,pDoc->SymImage.m_Column,pDoc->SymImage.m_Row,pDoc->m_clrLedBK);

                    //按點填充圖案

                    for (x = 0;x<pDoc->SymImage.m_Column;x++)

                        for (y = 0;y<pDoc->SymImage.m_Row;y++)

                            if (pDoc->SymImage.led_data[x][y] == TRUE)

                                MemDC.SetPixel(x,y,pDoc->m_clrLed);//(根据已知信息绘制图,MemDC可以存其他图片,当时对CDC这些也理解不深)

                    MemDC2.StretchBlt(1,1,m_iImageSize-2,m_iImageSize-2,&MemDC,0,0,pDoc->SymImage.m_Column,pDoc->SymImage.m_Row,SRCCOPY);//缩放保存到MemDC2里,StretchBlt可能有失真

                    m_imagelist.Add(&bmp2,RGB(255,255,255));//添加到图片列表

                    m_wndFileView.SetItemImage(hItem,n,n);//设置对应图片

                    if (m_wndFileView.GetNextSiblingItem(hItem) == NULL)

                        break;

                    else

                        hItem = m_wndFileView.GetNextSiblingItem(hItem);

                    }//endwhile (hItem != NULL)

                hItem = m_wndFileView.GetParentItem(hItem);

                }

            hItem = m_wndFileView.GetNextSiblingItem(hItem);

            }//endwhile (hItem != NULL)

        MemDC2.FillSolidRect(0,0,m_iImageSize,m_iImageSize,RGB(255, 255, 255));

        m_imagelist.Add(&bmp2,RGB(0, 0, 0));

        m_wndFileView.SetImageList(&m_imagelist, TVSIL_NORMAL);//关联图片列表

        ::ReleaseDC(this->m_hWnd, MemDC);

        ::ReleaseDC(this->m_hWnd, MemDC2);

        /***********************************/

    }

    //就这样,树形图子项要对应的图片存到关联的CImagelist里,小地图需要变化时替换CImagelist里对应的项然后再刷新树形图就可以实现树形图旁边带着的小地图动态变换了。

    五.结语:

        这时写文章回顾这个代码写的真的很糟糕(负能量代码,抱歉),只是实现了功能。在博客园还是哪个地方看了篇技术观念的文章,嗯,深耕技术(这个词很喜欢)。希望未来我们都能做喜欢干的事情吧(希望终有一天能成为谷雨大神或雨神吧,嗯,希望),这算是记录下当时的思路(黑历史)的处女作吧,见谅。

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  • 原文地址:https://www.cnblogs.com/MJGY/p/10198494.html
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