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正在开发中的游戏有个全屏功能--可以在window桌面背景上运行,就像一些视频播放器在桌面背景上播放一样的,花了个上午整了个Demo放出来留个纪念。

实现功能:显示图标,双击图标执行相应的程序,右击图标弹出该图标对应得菜单,点击非图标区则弹出桌面菜单。需要完整工程可以点此下载:DesktopWindow.rar。程序效果图如下:

 在这个程序里,定义了一个XShellItem的数据结构,保持桌面图标的iten id(ITEMIDLiST),图标以及文字图标。

    struct XShellItem {
        ITEMIDLIST
*     itemId;

        
int x;
        
int y;
        
int w;
        
int h;

        
int nameX;
        
int nameY;
        
int nameW;
        
int nameH;

        BOOL hit;

        CStringW name;
        Bitmap
*     icon;
        Bitmap
*     nameIcon;

        XShellItem()
        :
        itemId(NULL),
        x(
0),
        y(
0),
        w(
0),
        h(
0),
        nameX(
0),
        nameY(
0),
        nameW(
0),
        nameH(
0),
        name(L
""),
        hit(FALSE),
        icon(NULL),
        nameIcon(NULL) 
{
        }

        
~XShellItem() {
        }

    }
;

然后定义一个数组CAtlArray<XShellItem> itemArray;用来保存所有桌面图标对象,在InitShellFolder()中对它进行初始化:

    // 获取桌面图标的相关数据
    BOOL InitShellFolder()
    
{
        HRESULT hRslt 
= SHGetDesktopFolder(&folder);
        
if (FAILED(hRslt)) {
            
return FALSE;
        }


        CComPtr
<IEnumIDList> ids;
        hRslt 
= folder->EnumObjects(0, SHCONTF_FOLDERS | SHCONTF_NONFOLDERS, &ids);
        
if (FAILED(hRslt)) {
            
return FALSE;
        }


        CAtlList
<XShellItem> items;
        
for (;;) {
            ITEMIDLIST
*     id = 0;
            ULONG cIds 
= 0;

            hRslt 
= ids->Next(1&id, &cIds);
            
if (hRslt != S_OK) {
                
break;
            }


            CStringW name;
            STRRET str 
= 0};
            hRslt 
= folder->GetDisplayNameOf(id, SHGDN_NORMAL | SHGDN_INFOLDER, &str);
            
if (SUCCEEDED(hRslt)) {
                LPWSTR pname 
= 0;
                StrRetToStrW(
&str, id, &pname);
                name 
= pname;
                CoTaskMemFree(pname);
            }


            XShellItem item;

            item.itemId 
= id;
            item.name 
= name;
            items.AddTail(item);
        }


        SIZE_T iItem 
= 0;
        SIZE_T cItems 
= items.GetCount();

        itemArray.SetCount(cItems);

        POSITION pos 
= items.GetHeadPosition();
        
while (pos != 0{
            XShellItem
&     si = items.GetNext(pos);
            itemArray[iItem] 
= si;
            iItem
++;
        }


        HDC hDC 
= CreateCompatibleDC(0);

        Graphics g(hDC);
        g.Clear(Color(
0000));

        ICONMETRICS im 
= 0};
        im.cbSize 
= sizeof(im);
        SystemParametersInfo(SPI_GETICONMETRICS, 
sizeof(im), &im, 0);

        SolidBrush br_t(Color(
255255255));
        Font font_i(hDC, 
&(im.lfFont));
        
float fcy = font_i.GetHeight(&g) * 2 + 2;
        DeleteDC(hDC);

        Gdiplus::StringFormat sf(Gdiplus::StringFormat::GenericTypographic());
        sf.SetAlignment(Gdiplus::StringAlignmentCenter);
        sf.SetTrimming(Gdiplus::StringTrimmingEllipsisWord);

        iconSpacingWidth 
= im.iHorzSpacing + OFFSET_WIDTH;
        iconSpacingHeight 
= im.iVertSpacing + OFFSET_HEIGHT;

        
int iconWidth = GetSystemMetrics(SM_CXICON);
        
int iconHeight = GetSystemMetrics(SM_CYICON);

        
for (SIZE_T i = 0; i < cItems; i++{
            XShellItem
&     item = itemArray[i];

            
// SHGetFileInfo
            HICON hIcon = 0;
            HIMAGELIST hImgList;
            SHFILEINFO stSHFileInfo;
            CImageList cImgList;

            
// 获取图标
            hImgList = (HIMAGELIST)::SHGetFileInfo(
                    (LPCWSTR) item.itemId,
                    
0,
                    
&stSHFileInfo,
                    
sizeof(SHFILEINFO),
                    SHGFI_PIDL 
| SHGFI_ICON | SHGFI_LARGEICON | SHGFI_SYSICONINDEX);

            
// DIBSection 8bit
            BITMAPINFO bmi;
            BITMAPINFOHEADER
&  bmih = bmi.bmiHeader;
            bmih.biSize 
= sizeof(bmih);
            bmih.biWidth 
= ICON_WIDTH;
            bmih.biHeight 
= -ICON_HEIGHT;    // BMP反转
            bmih.biPlanes = 1;
            bmih.biBitCount 
= 32;
            bmih.biCompression 
= BI_RGB;
            bmih.biSizeImage 
= 0;
            bmih.biXPelsPerMeter 
= 0;
            bmih.biYPelsPerMeter 
= 0;
            bmih.biClrUsed 
= 0;
            bmih.biClrImportant 
= 0;

            HDC memDC 
= CreateCompatibleDC(0);
            
void*  pDib = 0;
            HBITMAP hBmp 
= CreateDIBSection(memDC, &bmi, DIB_RGB_COLORS, &pDib, 00);
            GdiFlush();

            HGDIOBJ old 
= SelectObject(memDC, hBmp);

            
// ImageList_Draw WindowsXP
            ImageList_SetBkColor(hImgList, 0x0);
            ImageList_Draw(hImgList, stSHFileInfo.iIcon, memDC, 
00, ILD_NORMAL);
            SelectObject(memDC, old);
            DeleteDC(memDC);

            cImgList.Attach(hImgList);
            hIcon 
= cImgList.ExtractIcon(stSHFileInfo.iIcon);
            cImgList.Detach();

            
if (hIcon != 0{

                
// Bitmap::FromHICON 0~255
                item.icon = Bitmap::FromHICON(hIcon);
                item.w 
= iconWidth;
                item.h 
= iconHeight;

                Gdiplus::RectF rc(
float(2), float(2), float(iconSpacingWidth - 4), fcy);

                Gdiplus::Bitmap 
* nameIcon = new Bitmap(NAME_WIDTH, NAME_HEIGHT, &g);
                Gdiplus::Graphics 
* g2 = Gdiplus::Graphics::FromImage(nameIcon);
                g2
->Clear(Gdiplus::Color(Gdiplus::ARGB(0)));

                g2
->DrawString(item.name, item.name.GetLength(), &font_i, rc, &sf, &br_t);

                item.nameIcon 
= nameIcon;
                item.nameW 
= NAME_WIDTH;
                item.nameH 
= NAME_HEIGHT;

                delete g2;
            }


            DestroyIcon(hIcon);
            DeleteObject(hBmp);
            DestroyIcon(stSHFileInfo.hIcon);
        }


        
return TRUE;
    }

注意这里面并没有设置图标对象的位置,因为当窗口改变大小的时候,相应地也要调整图标的描绘位置,所以图标位置是在SetShellItemPosition()中动态调整的.

    // 根据窗口大小设置图标位置
    void SetShellItemPosition()
    
{
        
int iconWidth = GetSystemMetrics(SM_CXICON);
        
int iconHeight = GetSystemMetrics(SM_CYICON);
        
static const int OFFSET_Y = 20;
        
int x = 0;
        
int y = OFFSET_Y;
        SIZE_T cItems 
= itemArray.GetCount();
        
for (SIZE_T i = 0; i < cItems; i++{
            XShellItem
&     item = itemArray[i];
            
if (item.icon) {
                item.x 
= x + (iconSpacingWidth - iconWidth) / 2;
                item.y 
= y;
            }


            
if (item.nameIcon) {
                item.nameX 
= x;
                item.nameY 
= y + iconHeight + 2;
            }


            WTL::CRect rect;
            GetClientRect(
&rect);
            y 
+= iconSpacingHeight;
            
if (y + iconSpacingHeight >= rect.bottom) {
                x 
+= iconSpacingWidth;
                y 
= OFFSET_Y;
            }

        }

    }

描绘图标就很简单了,呵呵,不贴了,下面来说说弹出图标菜单,执行图标对应的程序以及弹出桌面菜单。

执行图标对应的程序,需要以先前保持的图标itemid作为参数,代码如下:

    void RunShellItem(ITEMIDLIST* pIID)
    
{
        SHELLEXECUTEINFO info;
        info.cbSize 
= sizeof(SHELLEXECUTEINFO);
        info.fMask 
= SEE_MASK_INVOKEIDLIST;
        info.hwnd 
= m_hWnd;
        info.lpVerb 
= NULL;
        info.lpFile 
= NULL;
        info.lpParameters 
= NULL;
        info.lpDirectory 
= NULL;
        info.nShow 
= SW_SHOWNORMAL;
        info.hInstApp 
= NULL;
        info.lpIDList 
= pIID;
        ShellExecuteEx(
&info);
    }

弹出桌面菜单的代码如下:

    // 桌面菜单
    void DesktopMenu()
    
{
        HWND program 
= FindWindowEx(00, _T("Progman"), _T("Program Manager"));
        HWND view 
= FindWindowEx(program, 0, _T("SHELLDLL_DefView"), 0);

        
//HWND list = FindWindowEx(view, 0, _T("SysListView32"), 0);
        ::SetForegroundWindow(view);

        POINT pt;
        GetCursorPos(
&pt);

        LPARAM lp 
= pt.y << 16 | (pt.x - 32);
        ::PostMessage(view, WM_LBUTTONDOWN, 
0, lp);
        ::PostMessage(view, WM_RBUTTONUP, 
0, lp);
    }

弹出图标菜单的代码如下,这里定义了两个全局的IContextMenu对象:
static IContextMenu2*  g_pIContext2 = NULL;
static IContextMenu3*  g_pIContext3 = NULL;

以便在消息回调函数中使用。具体代码如下:

    // 图标菜单
    void RightMenu(ITEMIDLIST* pIID)
    
{
        HWND hwnd 
= m_hWnd;

        LPCONTEXTMENU pContextMenu 
= NULL;
        LPCONTEXTMENU pCtxMenuTemp 
= NULL;

        g_pIContext2 
= NULL;
        g_pIContext3 
= NULL;

        
int menuType = 0;

        HRESULT hRslt 
= folder->GetUIObjectOf(
                hwnd,
                
1,
                (LPCITEMIDLIST
*&(pIID),
                IID_IContextMenu,
                
0,
                (
void**&pCtxMenuTemp);
        
if (FAILED(hRslt)) {
            
return;
        }


        POINT pt;
        GetCursorPos(
&pt);

        
if (pCtxMenuTemp->QueryInterface(IID_IContextMenu3, (void**&pContextMenu) == NOERROR) {
            menuType 
= 3;
        }

        
else if (pCtxMenuTemp->QueryInterface(IID_IContextMenu2, (void**&pContextMenu) == NOERROR) {
            menuType 
= 2;
        }


        
if (pContextMenu) {
            pCtxMenuTemp
->Release();
        }

        
else {
            pContextMenu 
= pCtxMenuTemp;
            menuType 
= 1;
        }


        
if (menuType == 0{
            
return;
        }


        HMENU hMenu 
= CreatePopupMenu();
        hRslt 
= pContextMenu->QueryContextMenu(hMenu, 010x7fff, CMF_NORMAL | CMF_EXPLORE);
        
if (FAILED(hRslt)) {
            
return;
        }


#ifndef _WIN64
    
#pragma warning(disable : 4244 4311)
#endif

        
// subclass window
        WNDPROC oldWndProc = NULL;
        
if (menuType > 1{

            
// only subclass if it is IID_IContextMenu2 or IID_IContextMenu3
            oldWndProc = (WNDPROC) SetWindowLongPtr(GWL_WNDPROC, (LONG) HookWndProc);
            
if (menuType == 2{
                g_pIContext2 
= (LPCONTEXTMENU2) pContextMenu;
            }

            
else {
                g_pIContext3 
= (LPCONTEXTMENU3) pContextMenu;
            }

        }

        
else {
            oldWndProc 
= NULL;
        }


        
int cmd = ::TrackPopupMenu(
                hMenu,
                TPM_LEFTALIGN 
| TPM_BOTTOMALIGN | TPM_RETURNCMD | TPM_LEFTBUTTON,
                pt.x,
                pt.y,
                
0,
                hwnd,
                
0);

        
// unsubclass
        if (oldWndProc) {
            SetWindowLongPtr(GWL_WNDPROC, (LONG) oldWndProc);
        }


#ifndef _WIN64
    
#pragma warning(default : 4244 4311)
#endif
        
if (cmd != 0{
            CMINVOKECOMMANDINFO ci 
= 0};
            ci.cbSize 
= sizeof(CMINVOKECOMMANDINFO);
            ci.hwnd 
= hwnd;
            ci.lpVerb 
= (LPCSTR) MAKEINTRESOURCE(cmd - 1);
            ci.nShow 
= SW_SHOWNORMAL;

            pContextMenu
->InvokeCommand(&ci);
        }


        pContextMenu
->Release();
        g_pIContext2 
= NULL;
        g_pIContext3 
= NULL;
        ::DestroyMenu(hMenu);
    }


    
static LRESULT CALLBACK HookWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
    
{
        
switch (message) {
        
case WM_MENUCHAR:    // only supported by IContextMenu3
            if (g_pIContext3) {
                LRESULT lResult 
= 0;
                g_pIContext3
->HandleMenuMsg2(message, wParam, lParam, &lResult);
                
return(lResult);
            }

            
break;
        
case WM_DRAWITEM:
        
case WM_MEASUREITEM:
            
if (wParam) {
                
break;    // if wParam != 0 then the message is not menu-related
            }


        
case WM_INITMENUPOPUP:
            
if (g_pIContext2) {
                g_pIContext2
->HandleMenuMsg(message, wParam, lParam);
            }

            
else {
                g_pIContext3
->HandleMenuMsg(message, wParam, lParam);
            }


            
return(message == WM_INITMENUPOPUP ? 0 : TRUE);
            
break;
        
default:
            
break;
        }


        
return ::CallWindowProc((WNDPROC) GetProp(hWnd, TEXT("oldWndProc")), hWnd, message, wParam, lParam);
    }


posted on 2008-02-23 14:28 罗朝辉 阅读(3871) 评论(7)  编辑 收藏 引用 所属分类: Windows

评论

# re: 模拟window桌面实现 2008-02-23 18:32 Simulator
漂亮  回复  更多评论
  

# re: 模拟window桌面实现 2008-02-24 23:06 魔域私服
不错不错,学习了  回复  更多评论
  

# re: 模拟window桌面实现 2008-02-25 09:45 Enoch
lz很强大,很暴力。  回复  更多评论
  

# re: 模拟window桌面实现 2008-02-26 11:46 大胆地
很好  回复  更多评论
  

# re: 模拟window桌面实现 2008-03-05 22:16 #Ant
不错的东西,很好很强大!  回复  更多评论
  

# re: 模拟window桌面实现 2008-05-30 23:06 hoodlum1980
windows的图标,是一个ListView窗口。  回复  更多评论
  

# re: 模拟window桌面实现 2009-03-09 17:18 飘飘白云
对右键弹出shell item菜单的改进:

新添加一个变量:
ATL::CComPtr<IContextMenu3> m_pContextMenu;

// 新右键菜单
void RightMenu(ITEMIDLIST* pIID)
{
if (m_pFolder == 0){
return;
}

HWND hwnd = *this;

ATL::CComPtr<IContextMenu> cm;
HRESULT hRslt = m_pFolder->GetUIObjectOf(
hwnd,
1,
(LPCITEMIDLIST*) &(pIID),
IID_IContextMenu,
0,
(void**) &cm);
if (FAILED(hRslt)) {
return;
}

HMENU hMenu = ::CreatePopupMenu();

hRslt = cm->QueryContextMenu(hMenu, 0, 1, 0x7fff, CMF_NORMAL);
if (SUCCEEDED(hRslt)) {
WTL::CPoint pt;
::GetCursorPos(&pt);

m_pContextMenu.Release();
cm->QueryInterface(&m_pContextMenu);

SetForegroundWindow(hwnd);

int cmd = ::TrackPopupMenu(hMenu, TPM_LEFTALIGN | TPM_RETURNCMD | TPM_LEFTBUTTON, pt.x, pt.y, 0, hwnd, 0);

::PostMessageW(hwnd, WM_NULL, 0, 0);

m_pContextMenu.Release();

if (cmd != 0) {
CMINVOKECOMMANDINFO ci = { 0};
ci.cbSize = sizeof(ci);
ci.hwnd = hwnd;
ci.lpVerb = (LPCSTR) MAKEINTRESOURCE(cmd - 1);
ci.nShow = SW_SHOWNORMAL;

cm->InvokeCommand(&ci);
}
}

::DestroyMenu(hMenu);
}

添加处理菜单消息的函数:
MESSAGE_HANDLER(WM_INITMENUPOPUP, OnMenuHandler)
MESSAGE_HANDLER(WM_DRAWITEM, OnMenuHandler)
MESSAGE_HANDLER(WM_MENUCHAR, OnMenuHandler)
MESSAGE_HANDLER(WM_MEASUREITEM, OnMenuHandler)

LRESULT OnMenuHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
LRESULT lResult = 0;

if (m_pContextMenu != 0) {
m_pContextMenu->HandleMenuMsg2(uMsg, wParam, lParam, &lResult);
}

return lResult;
}
  回复  更多评论
  


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