Creating Icon Overlay Handlers

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2024-08-12 14:41:30 235人阅读

创建图标标记 Handlers (续)

1、新建一个ATL Project。

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2、建议将 Project Property 中 Linker – General - “Register Output” 设为 no，C/C++ - “Code Generation” - “Runtime Library” 设为 /MTd。

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3、在 Solution Explorer 中右键 Add Class，选择 ATL Simple Object。并在弹出的对话框中为该 Class 命名。

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4、添加完成后建议 Build 一下 Project，MIDL compiler 将根据 .idl 文件生成 IIDs and CLSIDs。

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5、切换到新增 Class 的 .h 文件中，使其继承接口 IShellIconOverlayIdentifier。

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 1 // MyOverlay.h : Declaration of the CMyOverlay 2  3 #pragma once 4 #include "resource.h"       // main symbols 5  6  7  8 #include "Example_i.h" 9 #include <ShlObj.h>10 11 12 13 #if defined(_WIN32_WCE) && !defined(_CE_DCOM) && !defined(_CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA)14 #error "Single-threaded COM objects are not properly supported on Windows CE platform, such as the Windows Mobile platforms that do not include full DCOM support. Define _CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA to force ATL to support creating single-thread COM object‘s and allow use of it‘s single-threaded COM object implementations. The threading model in your rgs file was set to ‘Free‘ as that is the only threading model supported in non DCOM Windows CE platforms."15 #endif16 17 using namespace ATL;18 19 20 // CMyOverlay21 22 class ATL_NO_VTABLE CMyOverlay :23     public CComObjectRootEx<CComSingleThreadModel>,24     public CComCoClass<CMyOverlay, &CLSID_MyOverlay>,25     public IDispatchImpl<IMyOverlay, &IID_IMyOverlay, &LIBID_ExampleLib, 26     /*wMajor =*/ 1, /*wMinor =*/ 0>,27     public IShellIconOverlayIdentifier28 {29 public:30     CMyOverlay()31     {32     }33 34 DECLARE_REGISTRY_RESOURCEID(IDR_MYOVERLAY)35 36 37 BEGIN_COM_MAP(CMyOverlay)38     COM_INTERFACE_ENTRY(IMyOverlay)39     COM_INTERFACE_ENTRY(IDispatch)40     COM_INTERFACE_ENTRY(IShellIconOverlayIdentifier)41 END_COM_MAP()42 43 44 45     DECLARE_PROTECT_FINAL_CONSTRUCT()46 47     STDMETHOD(IsMemberOf)(THIS_ _In_ PCWSTR pwszPath, DWORD dwAttrib);48     STDMETHOD(GetOverlayInfo)(THIS_ _Out_writes_(cchMax) PWSTR pwszIconFile, 49         int cchMax, _Out_ int * pIndex, _Out_ DWORD * pdwFlags);50     STDMETHOD(GetPriority)(THIS_ _Out_ int * pIPriority);51 52     HRESULT FinalConstruct()53     {54         return S_OK;55     }56 57     void FinalRelease()58     {59     }60 61 public:62 63 64 65 };66 67 OBJECT_ENTRY_AUTO(__uuidof(MyOverlay), CMyOverlay)

MyOverlay.h

6、根据 MSDN 实现该 Class。

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 1 // MyOverlay.cpp : Implementation of CMyOverlay 2  3 #include "stdafx.h" 4 #include "MyOverlay.h" 5 #include <WinBase.h> 6 #pragma comment(lib, "Kernel32.lib") 7  8 // CMyOverlay 9 10 STDMETHODIMP CMyOverlay::IsMemberOf(THIS_ _In_ PCWSTR pwszPath, DWORD dwAttrib)11 {12     if (_tcscmp(pwszPath, L"test") == 0)13     {14         return S_OK;15     }16     else17     {18         return S_FALSE;19     }20 }21 22 STDMETHODIMP CMyOverlay::GetOverlayInfo(23     THIS_ _Out_writes_(cchMax) PWSTR pwszIconFile, 24     int cchMax, 25     _Out_ int * pIndex,26     _Out_ DWORD * pdwFlags)27 {28     29     GetModuleFileNameW(_AtlBaseModule.GetModuleInstance(), pwszIconFile, cchMax);30 31     *pIndex = 0;32 33     *pdwFlags = ISIOI_ICONFILE | ISIOI_ICONINDEX;34 35     return S_OK;36 }37 38 STDMETHODIMP CMyOverlay::GetPriority(THIS_ _Out_ int * pIPriority)39 {40     *pIPriority = 0;41 42     return S_OK;43 }

MyOverlay.cpp

7、在 .rgs 文件中添加注册表信息，确保各 GUID 与 .idl 文件中的一致。

 1 HKCR 2 { 3     NoRemove CLSID 4     { 5         ForceRemove {29913677-1662-46C5-8645-16F84DA6F438} = s ‘MyOverlay Class‘ 6         { 7             ForceRemove Programmable 8             InprocServer32 = s ‘%MODULE%‘ 9             {10                 val ThreadingModel = s ‘Apartment‘11             }12             TypeLib = s ‘{942F4DBB-4667-4767-A35B-52F32F623C63}‘13             Version = s ‘1.0‘14         }15     }16 }17 18 HKLM19 {20     NoRemove SOFTWARE21     {22         NoRemove Microsoft23         {24             NoRemove Windows25             {26                 NoRemove CurrentVersion27                 {28                     NoRemove Explorer29                     {30                         NoRemove ShellIconOverlayIdentifiers31                         {32                             ForceRemove ‘  MyOverlay‘ = s ‘{29913677-1662-46C5-8645-16F84DA6F438}‘33                             {34                             }35                         }36                     }37                 }38             }39         }40     }41 }