[Ray Linn]用Visual Studio 2008开发IE BHO(浏览器帮助对象) 之三

接下来,我们要为IE增加一个按钮(注意不是toolbar,toolbar要复杂得多),基本这是一个注册表的魔术.打开RayBHO.rgs, 添加

Java代码

HKLM
{
NoRemove Software
{
NoRemove Microsoft
{
NoRemove 'Internet Explorer'
{
NoRemove Extensions
{
ForceRemove '{1AC31710-6759-484f-A129-A70C55485DA1}'
{
val ButtonText = s 'Hello,World'
val Icon = s '%MODULE%,201'
val HotIcon = s '%MODULE%,202'
val CLSID = s '{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}'
val ClsidExtension = s '{057F3E68-6C2E-40A5-A641-E8CF9D6766F3}'
val 'Default Visible' = s 'yes'
}
}
}
}
}
}

HKLM
{
NoRemove Software
{
NoRemove Microsoft
{
NoRemove 'Internet Explorer'
{
NoRemove Extensions
{
ForceRemove '{1AC31710-6759-484f-A129-A70C55485DA1}'
{
val ButtonText = s 'Hello,World'
val Icon = s '%MODULE%,201'
val HotIcon = s '%MODULE%,202'
val CLSID = s '{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}'
val ClsidExtension = s '{057F3E68-6C2E-40A5-A641-E8CF9D6766F3}'
val 'Default Visible' = s 'yes'
}
}
}
}
}
}

当然,你也可以把这一项放在HKCU(Current User)下,这样的话,该Button只对当前用户起作用.

这些注册表项说明如下:

Java代码

ForceRemove '{1AC31710-6759-484f-A129-A70C55485DA1}' -- 该extersion的CLSID,请自己用GUID这个程序生成.
val ButtonText = s 'Hello,World' // 按钮上的文字说明
val Icon = s '%MODULE%,201' // 按钮的图标,可以是icon的绝对路径,也可以和我的例子一样从资源文件里加载.
val HotIcon = s '%MODULE%,202'// 鼠标悬停时按钮的图标,与Icon类似.
val CLSID = s '{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}' //该CLSID意思为可执行,此值有特定含义,请小心修改.
val ClsidExtension = s '{057F3E68-6C2E-40A5-A641-E8CF9D6766F3}' // 这个是RayBHO的CLSID,即表示该按钮的动作连接到RayBHO这个com上,具体值有所不同,必须查询你自己的rgs文件得到.
val 'Default Visible' = s 'yes'//按钮可见.

ForceRemove '{1AC31710-6759-484f-A129-A70C55485DA1}' -- 该extersion的CLSID,请自己用GUID这个程序生成.
val ButtonText = s 'Hello,World' // 按钮上的文字说明
val Icon = s '%MODULE%,201' // 按钮的图标,可以是icon的绝对路径,也可以和我的例子一样从资源文件里加载.
val HotIcon = s '%MODULE%,202'// 鼠标悬停时按钮的图标,与Icon类似.
val CLSID = s '{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}' //该CLSID意思为可执行,此值有特定含义,请小心修改.
val ClsidExtension = s '{057F3E68-6C2E-40A5-A641-E8CF9D6766F3}' // 这个是RayBHO的CLSID,即表示该按钮的动作连接到RayBHO这个com上,具体值有所不同,必须查询你自己的rgs文件得到.
val 'Default Visible' = s 'yes'//按钮可见.

当然你也可以不使用COM来响应按钮的动作,另外两个键Exec和Script,可以设置响应的程序或者脚本..这个不是重点.

现在编译,然后从IE的自定义工具栏将这个按钮拖出来...如图所示:

点点看.....结果呢? 当然是不起作用!

因为除以上步骤外，该com 对象还必须实现 IOleCommandTarget接口。

IOleCommandTarget包含QueryStatus和Exec两个方法，其中QueryStatus方法会被IE调用来获得当前菜单的状态.当工具条按钮被点击时，com 对象的 IOleCommandTarget::exec 方法被调用，此时ncmdid 的值为 1；当菜单项被点击时，ncmdid 的值为 2。这样开发者就能区分工具条按钮和菜单项这两个不同操作

首先让CRayBHO继承IOleCommandTarget接口,最后我们得到这样得一个继承树

Java代码

class ATL_NO_VTABLE CRayBHO :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CHelloWorldBHO, &CLSID_HelloWorldBHO>,
public IObjectWithSiteImpl<CHelloWorldBHO>,
public IDispatchImpl<IHelloWorldBHO, &IID_IHelloWorldBHO, &LIBID_HelloWorldPluginLib, /*wMajor =*/ 1, /*wMinor =*/ 0>,
public IDispEventImpl<1,CHelloWorldBHO,&DIID_DWebBrowserEvents2,&LIBID_SHDocVw,1,1>,
public IOleCommandTarget

class ATL_NO_VTABLE CRayBHO :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CHelloWorldBHO, &CLSID_HelloWorldBHO>,
public IObjectWithSiteImpl<CHelloWorldBHO>,
public IDispatchImpl<IHelloWorldBHO, &IID_IHelloWorldBHO, &LIBID_HelloWorldPluginLib, /*wMajor =*/ 1, /*wMinor =*/ 0>,
public IDispEventImpl<1,CHelloWorldBHO,&DIID_DWebBrowserEvents2,&LIBID_SHDocVw,1,1>,
public IOleCommandTarget

再COM_MAP里增加

Java代码

COM_INTERFACE_ENTRY(IOleCommandTarget)

COM_INTERFACE_ENTRY(IOleCommandTarget)

最终得到

Java代码

BEGIN_COM_MAP(CHelloWorldBHO)
COM_INTERFACE_ENTRY(IHelloWorldBHO)
COM_INTERFACE_ENTRY(IObjectWithSite)
COM_INTERFACE_ENTRY(IOleCommandTarget)
COM_INTERFACE_ENTRY(IDispatch)
END_COM_MAP()

	BEGIN_COM_MAP(CHelloWorldBHO)
COM_INTERFACE_ENTRY(IHelloWorldBHO)
COM_INTERFACE_ENTRY(IObjectWithSite)
COM_INTERFACE_ENTRY(IOleCommandTarget)
COM_INTERFACE_ENTRY(IDispatch)
END_COM_MAP()

声明IOleCommandTarget的两个方法

Java代码

// IOleCommandTarget
STDMETHOD(Exec)(const GUID*, DWORD nCmdID, DWORD, VARIANTARG*, VARIANTARG* pvaOut);
STDMETHOD(QueryStatus)(const GUID* pguidCmdGroup, ULONG cCmds, OLECMD prgCmds[], OLECMDTEXT* pCmdText);

	// IOleCommandTarget
STDMETHOD(Exec)(const GUID*, DWORD nCmdID, DWORD, VARIANTARG*, VARIANTARG* pvaOut);
STDMETHOD(QueryStatus)(const GUID* pguidCmdGroup, ULONG cCmds, OLECMD prgCmds[], OLECMDTEXT* pCmdText);

然后实现之,基本我们的重点放在Exec方法上...所以先给出QueryStatus的实现

Java代码

STDMETHODIMP CRayBHO::QueryStatus(const GUID* pguidCmdGroup, ULONG cCmds, OLECMD prgCmds[], OLECMDTEXT* pCmdText)
{
if (cCmds == 0) return E_INVALIDARG;
if (prgCmds == 0) return E_POINTER;
prgCmds[0].cmdf = OLECMDF_ENABLED;
return S_OK;
}

STDMETHODIMP CRayBHO::QueryStatus(const GUID* pguidCmdGroup, ULONG cCmds, OLECMD prgCmds[], OLECMDTEXT* pCmdText)
{
if (cCmds == 0) return E_INVALIDARG;
if (prgCmds == 0) return E_POINTER;
prgCmds[0].cmdf = OLECMDF_ENABLED;
return S_OK;
}

在Exce方法中,可以放入你的响应逻辑,或者更简单的,只是一个MessageBox响应. 这里我给出一段实际的Video Player的代码,这个代码可以为按钮添加下拉菜单,而这个菜单实际是保存在资源文件中的!并且你可以看到如何在Exce响应菜单上点击事件.

Java代码

STDMETHODIMP CRayBHO::Exec(const GUID*, DWORD nCmdID, DWORD, VARIANTARG*, VARIANTARG*)
{
if(m_spUnkSite == 0 || m_spWebBrowser == 0) return S_OK;
HRESULT hRes = S_OK;
CComPtr<IDispatch> pDocDisp;
CComQIPtr<IHTMLDocument2> pHtmlDoc2;
hRes = m_spWebBrowser->get_Document(&pDocDisp);
if(SUCCEEDED(hRes) && pDocDisp)
{
hRes = pDocDisp->QueryInterface(IID_IHTMLDocument2, (void**)&pHtmlDoc2);
if(SUCCEEDED(hRes) && pHtmlDoc2)
{
SHANDLE_PTR nBrowser = 0;
m_spWebBrowser->get_HWND(&nBrowser);
HWND hWndParent = (HWND)nBrowser;
POINT pt;
GetCursorPos(&pt);
HINSTANCE hInstance = _AtlBaseModule.GetModuleInstance();
HMENU hMenu = LoadMenu(hInstance,MAKEINTRESOURCE(IDR_MENU_POPUP));
HMENU hMenuTrackPopup = GetSubMenu(hMenu, 0);
if(hMenuTrackPopup && hWndParent)
{
BOOL bIsChevron = FALSE;
HWND hWndMenuParent = NULL;
HWND hWndToolBar = NULL;
hWndMenuParent = hWndParent;
hWndToolBar = WindowFromPoint(pt);
if(m_bIsIe7)
{
HWND hWndIe7ActiveTab = hWndParent;
HWND hWnd = GetWindow(hWndParent, GW_CHILD);
// looking for the Internet Explorer_Server window
// this window should be a parent for TrackPopupMenu
if(hWnd)
{
TCHAR szClassName[MAX_PATH];
while(hWnd)
{
memset(szClassName,0,MAX_PATH);
GetClassName(hWnd, szClassName, MAX_PATH);
if(_tcscmp(szClassName,_T("TabWindowClass"))==0)
{
// the active tab should be visible
if(IsWindowVisible(hWnd))
{
hWnd = GetWindow(hWnd, GW_CHILD);
while(hWnd)
{
memset(szClassName,0,MAX_PATH);
GetClassName(hWnd, szClassName, MAX_PATH);
if(_tcscmp(szClassName,_T("Shell DocObject View"))==0)
{
hWnd = FindWindowEx(hWnd, NULL, _T("Internet Explorer_Server"), NULL);
if(hWnd) hWndIe7ActiveTab = hWnd;
break;
}
hWnd = GetWindow(hWnd, GW_HWNDNEXT);
}
}
}
hWnd = GetWindow(hWnd, GW_HWNDNEXT);
}
}
if(hWndIe7ActiveTab) hWndMenuParent = hWndIe7ActiveTab;
//strHWndMenuParent = _ltoa(hWndMenuParent, 10);
}
int nIDCommand = -1;
BOOL bRightAlign = FALSE;
if(hWndToolBar)
{
ScreenToClient(hWndToolBar,&pt);
int nButton = (int)::SendMessage(hWndToolBar, TB_HITTEST, 0, (LPARAM)&pt);
if(nButton>0)
{
TBBUTTON pTBBtn;
memset(&pTBBtn,0,sizeof(TBBUTTON));
if(::SendMessage(hWndToolBar, TB_GETBUTTON, nButton, (LPARAM)&pTBBtn))
{
nIDCommand = pTBBtn.idCommand;
RECT rcButton;
if(::SendMessage(hWndToolBar,TB_GETRECT,nIDCommand,(LPARAM)&rcButton))
{
pt.x = rcButton.left;
pt.y = rcButton.bottom;
ClientToScreen(hWndToolBar,&pt);
RECT rcWorkArea;
SystemParametersInfo(SPI_GETWORKAREA,0,(LPVOID)&rcWorkArea,0);
if(rcWorkArea.right-pt.x<150)
{
bRightAlign = TRUE;
pt.x = rcButton.right;
pt.y = rcButton.bottom;
ClientToScreen(hWndToolBar,&pt);
}
}
}
}
else
{
GetCursorPos(&pt);
bIsChevron = TRUE;
}
}
UINT nFlags = TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON;
if(bRightAlign) nFlags |= TPM_RIGHTALIGN;
else nFlags |= TPM_LEFTALIGN;
// draw pressed button
if(nIDCommand!=-1 && !bIsChevron) ::SendMessage(hWndToolBar, TB_PRESSBUTTON, nIDCommand, MAKELPARAM(1,0));
// popup the menu
int nCommand = TrackPopupMenu(hMenuTrackPopup, nFlags, pt.x, pt.y, 0, hWndMenuParent, 0);
// release the button
if(nIDCommand!=-1 && !bIsChevron) ::SendMessage(hWndToolBar, TB_PRESSBUTTON, nIDCommand, MAKELPARAM(0,0));
//CStringArray* m_EvNameArr = new CStringArray();
//m_EvNameArr->Add(strHWndMenuParent);
BOOL bFound = FALSE;
switch (nCommand)
{
case ID_CHIMP:
{
MessageBox(hWndParent,_T("Play Video"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
case ID_SELECT:
{
MessageBox(hWndParent,_T("Select Video"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
case ID_STOP:
{
MessageBox(hWndParent,_T("Stop Video"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
case ID_ABOUT:
{
MessageBox(hWndParent,_T("About IEVideo"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
}
}
}
}
return S_OK;
}

STDMETHODIMP CRayBHO::Exec(const GUID*, DWORD nCmdID, DWORD, VARIANTARG*, VARIANTARG*)
{
if(m_spUnkSite == 0 || m_spWebBrowser == 0) return S_OK;
HRESULT hRes = S_OK;
CComPtr<IDispatch>        pDocDisp;
CComQIPtr<IHTMLDocument2> pHtmlDoc2;
hRes = m_spWebBrowser->get_Document(&pDocDisp);
if(SUCCEEDED(hRes) && pDocDisp)
{
hRes = pDocDisp->QueryInterface(IID_IHTMLDocument2, (void**)&pHtmlDoc2);
if(SUCCEEDED(hRes) && pHtmlDoc2)
{
SHANDLE_PTR nBrowser = 0;
m_spWebBrowser->get_HWND(&nBrowser);
HWND hWndParent = (HWND)nBrowser;
POINT pt;
GetCursorPos(&pt);
HINSTANCE hInstance = _AtlBaseModule.GetModuleInstance();
HMENU hMenu = LoadMenu(hInstance,MAKEINTRESOURCE(IDR_MENU_POPUP));
HMENU hMenuTrackPopup = GetSubMenu(hMenu, 0);
if(hMenuTrackPopup && hWndParent)
{
BOOL bIsChevron = FALSE;
HWND hWndMenuParent = NULL;
HWND hWndToolBar = NULL;
hWndMenuParent = hWndParent;
hWndToolBar = WindowFromPoint(pt);
if(m_bIsIe7)
{
HWND hWndIe7ActiveTab = hWndParent;
HWND hWnd = GetWindow(hWndParent, GW_CHILD);
// looking for the Internet Explorer_Server window
// this window should be a parent for TrackPopupMenu
if(hWnd)
{
TCHAR szClassName[MAX_PATH];
while(hWnd)
{
memset(szClassName,0,MAX_PATH);
GetClassName(hWnd, szClassName, MAX_PATH);
if(_tcscmp(szClassName,_T("TabWindowClass"))==0)
{
// the active tab should be visible
if(IsWindowVisible(hWnd))
{
hWnd = GetWindow(hWnd, GW_CHILD);
while(hWnd)
{
memset(szClassName,0,MAX_PATH);
GetClassName(hWnd, szClassName, MAX_PATH);
if(_tcscmp(szClassName,_T("Shell DocObject View"))==0)
{
hWnd = FindWindowEx(hWnd, NULL, _T("Internet Explorer_Server"), NULL);
if(hWnd) hWndIe7ActiveTab = hWnd;
break;
}
hWnd = GetWindow(hWnd, GW_HWNDNEXT);
}
}
}
hWnd = GetWindow(hWnd, GW_HWNDNEXT);
}
}
if(hWndIe7ActiveTab) hWndMenuParent = hWndIe7ActiveTab;
//strHWndMenuParent = _ltoa(hWndMenuParent, 10);
}
int nIDCommand = -1;
BOOL bRightAlign = FALSE;
if(hWndToolBar)
{
ScreenToClient(hWndToolBar,&pt);
int nButton = (int)::SendMessage(hWndToolBar, TB_HITTEST, 0, (LPARAM)&pt);
if(nButton>0)
{
TBBUTTON pTBBtn;
memset(&pTBBtn,0,sizeof(TBBUTTON));
if(::SendMessage(hWndToolBar, TB_GETBUTTON, nButton, (LPARAM)&pTBBtn))
{
nIDCommand = pTBBtn.idCommand;
RECT rcButton;
if(::SendMessage(hWndToolBar,TB_GETRECT,nIDCommand,(LPARAM)&rcButton))
{
pt.x = rcButton.left;
pt.y = rcButton.bottom;
ClientToScreen(hWndToolBar,&pt);
RECT rcWorkArea;
SystemParametersInfo(SPI_GETWORKAREA,0,(LPVOID)&rcWorkArea,0);
if(rcWorkArea.right-pt.x<150)
{
bRightAlign = TRUE;
pt.x = rcButton.right;
pt.y = rcButton.bottom;
ClientToScreen(hWndToolBar,&pt);
}
}
}
}
else
{
GetCursorPos(&pt);
bIsChevron = TRUE;
}
}
UINT nFlags = TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON;
if(bRightAlign) nFlags |= TPM_RIGHTALIGN;
else nFlags |= TPM_LEFTALIGN;
// draw pressed button
if(nIDCommand!=-1 && !bIsChevron) ::SendMessage(hWndToolBar, TB_PRESSBUTTON, nIDCommand,  MAKELPARAM(1,0));
// popup the menu
int nCommand = TrackPopupMenu(hMenuTrackPopup, nFlags, pt.x, pt.y, 0, hWndMenuParent, 0);
// release the button
if(nIDCommand!=-1 && !bIsChevron) ::SendMessage(hWndToolBar, TB_PRESSBUTTON, nIDCommand,  MAKELPARAM(0,0));
//CStringArray* m_EvNameArr = new CStringArray();
//m_EvNameArr->Add(strHWndMenuParent);
BOOL bFound = FALSE;
switch (nCommand)
{
case ID_CHIMP:
{
MessageBox(hWndParent,_T("Play Video"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
case ID_SELECT:
{
MessageBox(hWndParent,_T("Select Video"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
case ID_STOP:
{
MessageBox(hWndParent,_T("Stop Video"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
case ID_ABOUT:
{
MessageBox(hWndParent,_T("About IEVideo"),_T("IEVideo --Ray"), MB_OK|MB_ICONEXCLAMATION);
}
break;
}
}
}
}
return S_OK;
}

最后的效果如下:

很有意思的是, 我被认为是windows的粉丝,但其实我工作里搞的是linux的driver. 论坛里的风气常常喜欢比较A比较B,或者痛斥A痛斥B, 但你深入了解了么?

posted @ 2009-05-05 10:29 jcss 阅读(1278) 评论(1) 编辑收藏举报

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[Ray Linn]用Visual Studio 2008开发IE BHO(浏览器帮助对象) 之三

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