208 lines
4.8 KiB
C++
208 lines
4.8 KiB
C++
//*******************************************************************************************
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//
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// Filename : XIcon.cpp
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//
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// Implementation file for CIconTemp and CXIcon
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//
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// Copyright (c) 1994 - 1996 Microsoft Corporation. All rights reserved
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//
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//*******************************************************************************************
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#include "Pch.H"
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#include "ThisDll.H"
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#include "Unknown.H"
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#include "XIcon.H"
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class CIconTemp : public CObjTemp
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{
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public:
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CIconTemp() : CObjTemp() {}
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CIconTemp(HICON hi) : CObjTemp() {Attach(hi);}
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~CIconTemp() {if (m_hObj) DestroyIcon(Detach());}
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operator HICON() const {return((HICON)m_hObj);}
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HICON Attach(HICON hObjNew) {return((HICON)CObjTemp::Attach((HANDLE)hObjNew));}
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HICON Detach() {return((HICON)CObjTemp::Detach());}
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} ;
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BOOL CXIcon::Init(HWND hwndLB, UINT idiDef)
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{
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m_hwndLB = hwndLB;
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m_cimlLg.Create(GetSystemMetrics(SM_CXICON), GetSystemMetrics(SM_CYICON), 8);
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m_cimlSm.Create(GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 8);
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HICON hIcon = LoadIcon(g_ThisDll.GetInstance(), MAKEINTRESOURCE(idiDef));
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return(m_cimlLg && m_cimlSm && AddIcon(hIcon)>=0);
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}
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UINT CXIcon::GetIDString(LPTSTR pszIDString, UINT uIDLen,
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LPCTSTR szIconFile, int iIndex, UINT wFlags)
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{
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static const TCHAR szIDFmt[] = TEXT("\"%s\" %d %08x");
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TCHAR szIDString[MAX_PATH + 2*ARRAYSIZE(szIDFmt)];
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int iRet = wsprintf(szIDString, szIDFmt, szIconFile, iIndex, wFlags);
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lstrcpyn(pszIDString, szIDString, uIDLen);
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return(iRet + 1);
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}
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int CXIcon::GetCachedIndex(LPCTSTR szIconFile, int iIndex, UINT wFlags)
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{
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TCHAR szIDString[MAX_PATH*2];
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GetIDString(szIDString, ARRAYSIZE(szIDString), szIconFile, iIndex, wFlags);
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int iLB = ListBox_FindStringExact(m_hwndLB, -1, szIDString);
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if (iLB < 0)
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{
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return(-1);
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}
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return (int)((INT_PTR)ListBox_GetItemData(m_hwndLB, iLB));
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}
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int CXIcon::CacheIcons(HICON hiLarge, HICON hiSmall,
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LPCTSTR szIconFile, int iIndex, UINT wFlags)
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{
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CIconTemp ciLarge(hiLarge);
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CIconTemp ciSmall(hiSmall);
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if (!hiLarge || !hiSmall)
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{
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return(-1);
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}
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TCHAR szIDString[MAX_PATH*2];
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GetIDString(szIDString, ARRAYSIZE(szIDString), szIconFile, iIndex, wFlags);
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int iLB = ListBox_AddString(m_hwndLB, szIDString);
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if (iLB < 0)
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{
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return(-1);
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}
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int iLarge = AddIcon(ciLarge, AI_LARGE);
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if (iLarge >= 0)
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{
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int iSmall = AddIcon(ciSmall, AI_SMALL);
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if (iSmall >= 0)
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{
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if (iLarge == iSmall)
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{
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// Should always happen;
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ListBox_SetItemData(m_hwndLB, iLB, iLarge);
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return(iLarge);
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}
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ImageList_Remove(m_cimlSm, iSmall);
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}
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ImageList_Remove(m_cimlLg, iLarge);
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}
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ListBox_DeleteString(m_hwndLB, iLB);
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return(-1);
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}
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HRESULT CXIcon::ExtractIcon(LPCTSTR szIconFile, int iIndex, UINT wFlags,
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HICON *phiconLarge, HICON *phiconSmall, DWORD dwSizes)
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{
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return(E_NOTIMPL);
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}
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int CXIcon::GetIcon(IShellFolder *psf, LPCITEMIDLIST pidl)
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{
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int iImage = -1;
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IExtractIcon *pxi;
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HRESULT hres = psf->GetUIObjectOf(NULL, 1, &pidl, IID_IExtractIcon, NULL, (LPVOID *)&pxi);
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if (FAILED(hres))
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{
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return(0);
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}
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CEnsureRelease erExtractIcon(pxi);
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TCHAR szIconFile[MAX_PATH];
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int iIndex;
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UINT wFlags = 0;
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hres = pxi->GetIconLocation(GIL_FORSHELL,
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szIconFile, ARRAYSIZE(szIconFile), &iIndex, &wFlags);
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if (FAILED(hres))
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{
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return(0);
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}
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//
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// if GIL_DONTCACHE was returned by the icon handler, dont
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// lookup the previous icon, assume a cache miss.
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//
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if (!(wFlags & GIL_DONTCACHE))
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{
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iImage = GetCachedIndex(szIconFile, iIndex, wFlags);
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}
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// if we miss our cache...
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if (iImage == -1)
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{
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HICON hiconLarge = NULL;
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HICON hiconSmall = NULL;
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int cxIcon = GetSystemMetrics(SM_CXICON);
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int cxSmIcon = GetSystemMetrics(SM_CXSMICON);
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// try getting it from the Extract member fuction
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hres = pxi->Extract(szIconFile, iIndex, &hiconLarge, &hiconSmall,
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MAKELONG(cxIcon, cxSmIcon));
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// S_FALSE means can you please do it
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if (hres == S_FALSE)
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{
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hres = ExtractIcon(szIconFile, iIndex, wFlags,
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&hiconLarge, &hiconSmall, MAKELONG(cxIcon, cxSmIcon));
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}
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if (SUCCEEDED(hres))
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{
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// Let CacheIcons check and destroy the hicon's
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iImage = CacheIcons(hiconLarge, hiconSmall, szIconFile, iIndex, wFlags);
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}
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// if we failed in any way pick a default icon
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if (iImage == -1)
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{
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if (wFlags & GIL_SIMULATEDOC)
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{
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iImage = 0; // II_DOCUMENT;
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}
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else if ((wFlags & GIL_PERINSTANCE) && PathIsExe(szIconFile))
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{
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iImage = 0; // II_APPLICATION;
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}
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else
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{
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iImage = 0; // II_DOCNOASSOC;
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}
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}
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}
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if (iImage < 0)
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{
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iImage = 0; // II_DOCNOASSOC;
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}
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return(iImage);
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}
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