Qt显示桌面菜单，包括此电脑/库目录

#include "shellitem.h" #include "shellmemmanager.h" #include <QDebug> ShellItem::ShellItem() : pParentFolder(0) , pidlRel(0) , pidlFQ(0) { } ShellItem::~ShellItem() { if(pParentFolder) { pParentFolder->Release(); pParentFolder = 0; } if(pidlFQ) { theMemManager.free(pidlFQ); pidlFQ = 0; } if(pidlRel) { theMemManager.free(pidlRel); pidlRel = 0; } } LPITEMIDLIST ShellItem::clone(LPCITEMIDLIST pidl) { if(!pidl) return 0; UINT size = getSize(pidl); LPITEMIDLIST pidlTarget = (LPITEMIDLIST)theMemManager.alloc(size); if(!pidlTarget) return 0; CopyMemory(pidlTarget, pidl, size); return pidlTarget; } LPITEMIDLIST ShellItem::concat(LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2) { LPITEMIDLIST pidlNew; UINT cb1 = 0; if(pidl1) cb1 = getSize(pidl1) - 2 * sizeof(BYTE); UINT cb2 = getSize(pidl2); pidlNew = createItem(cb1 + cb2); if(pidlNew) { if(pidl1) CopyMemory(pidlNew, pidl1, cb1); CopyMemory(((LPBYTE)pidlNew) + cb1, pidl2, cb2); } return pidlNew; } bool ShellItem::operator < (ShellItem const& r) { if(pParentFolder) { HRESULT hr = pParentFolder->CompareIDs(0, pidlRel, r.pidlRel); if(FAILED(hr)) return false; int v = (short)SCODE_CODE(GetScode(hr)); /* v < 0 pidl1 < pidl2 v = 0 pidl1 = pidl2 v > 0 pidl1 > pidl2 */ if(v < 0) return true; } return false; } void ShellItem::exec() const { if(!pParentFolder) return; IContextMenu *pcm; pParentFolder->AddRef(); HRESULT hr = pParentFolder->GetUIObjectOf(0, 1, (LPCITEMIDLIST*)&pidlRel, IID_IContextMenu, 0, (LPVOID*)&pcm); if(SUCCEEDED(hr)) { HMENU hPopup = CreatePopupMenu(); if(hPopup) { hr = pcm->QueryContextMenu(hPopup, 0, 1, 0x7fff, CMF_DEFAULTONLY | CMF_EXPLORE); if(SUCCEEDED(hr)) { UINT idCmd; idCmd = GetMenuItemID(hPopup, 0); if(idCmd && (idCmd != (UINT)-1)) { CMINVOKECOMMANDINFO cmi; cmi.cbSize = sizeof(CMINVOKECOMMANDINFO); cmi.fMask = 0; cmi.hwnd = 0; cmi.lpVerb = (LPCSTR)(INT_PTR)(idCmd - 1); cmi.lpParameters = NULL; cmi.lpDirectory = NULL; cmi.nShow = SW_SHOWNORMAL; cmi.dwHotKey = 0; cmi.hIcon = NULL; pcm->InvokeCommand(&cmi); } } DestroyMenu(hPopup); } } pParentFolder->Release(); } void ShellItem::contextMenu(void* handle, int x, int y) const { if(!pParentFolder) return; IContextMenu *pcm; pParentFolder->AddRef(); HRESULT hr = pParentFolder->GetUIObjectOf(0, 1, (LPCITEMIDLIST*)&pidlRel, IID_IContextMenu, 0, (LPVOID*)&pcm); if(SUCCEEDED(hr)) { HMENU hPopup = CreatePopupMenu(); if(hPopup) { hr = pcm->QueryContextMenu(hPopup, 0, 1, 0x7fff, CMF_NORMAL); if(SUCCEEDED(hr)) { IContextMenu2 *pcm2; pcm->QueryInterface(IID_IContextMenu2, (LPVOID*)&pcm2); UINT idCmd; idCmd = TrackPopupMenu( hPopup, TPM_LEFTALIGN | TPM_RETURNCMD | TPM_RIGHTBUTTON, x, y, 0, (HWND)handle, 0); if(pcm2) { pcm2->Release(); pcm2 = NULL; } if(idCmd && (idCmd != (UINT)-1)) { CMINVOKECOMMANDINFO cmi; cmi.cbSize = sizeof(CMINVOKECOMMANDINFO); cmi.fMask = 0; cmi.hwnd = 0; cmi.lpVerb = (LPCSTR)(INT_PTR)(idCmd - 1); cmi.lpParameters = NULL; cmi.lpDirectory = NULL; cmi.nShow = SW_SHOWNORMAL; cmi.dwHotKey = 0; cmi.hIcon = NULL; pcm->InvokeCommand(&cmi); } } DestroyMenu(hPopup); } } pParentFolder->Release(); } LPITEMIDLIST ShellItem::createItem(UINT size) { LPITEMIDLIST pidl = (LPITEMIDLIST)theMemManager.alloc(size); if(pidl) ZeroMemory(pidl, size); return pidl; } UINT ShellItem::getSize(LPCITEMIDLIST pidl) { UINT size = 0; LPITEMIDLIST pidlTemp = (LPITEMIDLIST) pidl; if(pidlTemp) { while(pidlTemp->mkid.cb) { size += pidlTemp->mkid.cb; pidlTemp = nextItem(pidlTemp); } size += 2 * sizeof(BYTE); } return size; } LPITEMIDLIST ShellItem::nextItem(LPCITEMIDLIST pidl) { if(pidl) return (LPITEMIDLIST)(LPBYTE)(((LPBYTE)pidl) + pidl->mkid.cb); else return 0; }