Hospedando controles ActiveX usando ATL AXHost
O exemplo em este tópico mostra como criar AXHost e como hospedar um controle ActiveX usando várias funções de ATL.Também mostra como acessar os eventos do controle e o coletor (usando IDispEventImpl) do controle que é hospedado.O exemplo hospeda o controle de calendário em uma janela principal ou janela filho.
Observe a definição do símbolo de USE_METHOD .Você pode alterar o valor de esse símbolo para variar entre 1 e 8.O valor do símbolo determina como o controle será criado:
Para valores pares numerados de USE_METHOD, a chamada para criar as subclasses host uma janela e ele converte em um host do controle.Para valores ímpares numerados, o código cria uma janela filho que atua como um host.
Para valores de USE_METHOD entre 1 e 4, acesso ao controle e o naufrágio de eventos é realizada na chamada que também cria o host.Os valores entre 5 e 8 consulte o host para engancham interfaces e o coletor.
Aqui está um resumo:
USE_METHOD |
Hosts |
Controle acesso e o naufrágio de evento |
Função demonstrada |
|---|---|---|---|
1 |
Janela filho |
Uma etapa |
CreateControlLicEx |
2 |
Janela principal |
Uma etapa |
AtlAxCreateControlLicEx |
3 |
Janela filho |
Uma etapa |
CreateControlEx |
4 |
Janela principal |
Uma etapa |
AtlAxCreateControlEx |
5 |
Janela filho |
Várias etapas |
CreateControlLic |
6 |
Janela principal |
Várias etapas |
AtlAxCreateControlLic |
7 |
Janela filho |
Várias etapas |
CreateControl |
8 |
Janela principal |
Várias etapas |
AtlAxCreateControl |
// Your project must be apartment threaded or the (AtlAx)CreateControl(Lic)(Ex)
// calls will fail.
#define _ATL_APARTMENT_THREADED
#include <atlbase.h>
#include <atlwin.h>
#include <atlhost.h>
// Value of g_UseMethod determines the function used to create the control.
int g_UseMethod = 0; // 1 to 8 are valid values
bool ValidateUseMethod() { return (1 <= g_UseMethod) && (g_UseMethod <= 8); }
#import "PROGID:MSCAL.Calendar.7" no_namespace, raw_interfaces_only
// Child window class that will be subclassed for hosting Active X control
class CChildWindow : public CWindowImpl<CChildWindow>
{
public:
BEGIN_MSG_MAP(CChildWindow)
END_MSG_MAP()
};
class CMainWindow : public CWindowImpl<CMainWindow, CWindow, CFrameWinTraits>,
public IDispEventImpl<1, CMainWindow, &__uuidof(DCalendarEvents), &__uuidof(__MSACAL), 7, 0>
{
public :
CChildWindow m_wndChild;
CAxWindow2 m_axwnd;
CWindow m_wndEdit;
static ATL::CWndClassInfo& GetWndClassInfo()
{
static ATL::CWndClassInfo wc =
{
{
sizeof(WNDCLASSEX),
CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS,
StartWindowProc,
0, 0, NULL, NULL, NULL,
(HBRUSH)(COLOR_WINDOW + 1),
0,
_T("MainWindow"),
NULL
},
NULL, NULL, IDC_ARROW, TRUE, 0, _T("")
};
return wc;
}
BEGIN_MSG_MAP(CMainWindow)
MESSAGE_HANDLER(WM_CREATE, OnCreate)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
END_MSG_MAP()
BEGIN_SINK_MAP(CMainWindow)
SINK_ENTRY_EX(1, __uuidof(DCalendarEvents), 1, OnClick)
END_SINK_MAP()
// Helper to display events
void DisplayNotification(TCHAR* pszMessage)
{
CWindow wnd;
wnd.Attach(GetDlgItem(2));
wnd.SendMessage(EM_SETSEL, (WPARAM)-1, -1);
wnd.SendMessage(EM_REPLACESEL, 0, (LPARAM)pszMessage);
}
// Event Handler for Click
STDMETHOD(OnClick)()
{
DisplayNotification(_T("OnClick\r\n"));
return S_OK;
}
LRESULT OnCreate(UINT, WPARAM, LPARAM, BOOL&)
{
HRESULT hr = E_INVALIDARG;
_pAtlModule->Lock();
RECT rect;
GetClientRect(&rect);
RECT rect2;
rect2 = rect;
rect2.bottom -=200;
// if g_UseMethod is odd then create AxHost directly as the child of the main window
if (g_UseMethod & 0x1)
{
m_axwnd.Create(m_hWnd, rect2, NULL, WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 1);
}
// if g_UseMethod is even then the AtlAx version is invoked.
else
{
// Create a child window.
// AtlAx functions will subclass this window.
m_wndChild.Create(m_hWnd, rect2, NULL, WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 1);
// Attach the child window to the CAxWindow so we can access the
// host that subclasses the child window.
m_axwnd.Attach(m_wndChild);
}
if (m_axwnd.m_hWnd != NULL)
{
CComPtr<IUnknown> spControl;
// The calls to (AtlAx)CreateControl(Lic)(Ex) do the following:
// Create Calendar control. (Passing in NULL for license key.
// Pass in valid license key to the Lic functions if the
// control requires one.)
// Get the IUnknown pointer for the control.
// Sink events from the control.
// The AtlAx versions subclass the hWnd that is passed in to them
// to implement the host functionality.
// The first 4 calls accomplish it in one call.
// The last 4 calls accomplish it using multiple steps.
switch (g_UseMethod)
{
case 1:
{
hr = m_axwnd.CreateControlLicEx(
OLESTR("MSCAL.Calendar.7"),
NULL,
NULL,
&spControl,
__uuidof(DCalendarEvents),
(IUnknown*)(IDispEventImpl<1, CMainWindow,
&__uuidof(DCalendarEvents), &__uuidof(__MSACAL), 7, 0>*)this
);
break;
}
case 2:
{
hr = AtlAxCreateControlLicEx(
OLESTR("MSCAL.Calendar.7"),
m_wndChild.m_hWnd,
NULL,
NULL,
&spControl,
__uuidof(DCalendarEvents),
(IUnknown*)(IDispEventImpl<1, CMainWindow,
&__uuidof(DCalendarEvents), &__uuidof(__MSACAL), 7, 0>*)this,
NULL
);
break;
}
case 3:
{
hr = m_axwnd.CreateControlEx(
OLESTR("MSCAL.Calendar.7"),
NULL,
NULL,
&spControl,
__uuidof(DCalendarEvents),
(IUnknown*)(IDispEventImpl<1, CMainWindow,
&__uuidof(DCalendarEvents), &__uuidof(__MSACAL), 7, 0>*)this
);
break;
}
case 4:
{
hr = AtlAxCreateControlEx(
OLESTR("MSCAL.Calendar.7"),
m_wndChild.m_hWnd,
NULL,
NULL,
&spControl,
__uuidof(DCalendarEvents),
(IUnknown*)(IDispEventImpl<1, CMainWindow,
&__uuidof(DCalendarEvents), &__uuidof(__MSACAL), 7, 0>*)this
);
break;
}
// The following calls create the control, obtain an interface to
// the control, and set up the sink in multiple steps.
case 5:
{
hr = m_axwnd.CreateControlLic(
OLESTR("MSCAL.Calendar.7")
);
break;
}
case 6:
{
hr = AtlAxCreateControlLic(
OLESTR("MSCAL.Calendar.7"),
m_wndChild.m_hWnd,
NULL,
NULL
);
break;
}
case 7:
{
hr = m_axwnd.CreateControl(
OLESTR("MSCAL.Calendar.7")
);
break;
}
case 8:
{
hr = AtlAxCreateControl(
OLESTR("MSCAL.Calendar.7"),
m_wndChild.m_hWnd ,
NULL,
NULL
);
break;
}
}
// have to obtain an interface to the control and set up the sink
if (g_UseMethod > 4)
{
if (SUCCEEDED(hr))
{
hr = m_axwnd.QueryControl(&spControl);
if (SUCCEEDED(hr))
{
// Sink events form the control
DispEventAdvise(spControl, &__uuidof(DCalendarEvents));
}
}
}
if (SUCCEEDED(hr))
{
// Use the returned IUnknown pointer.
CComPtr<ICalendar> spCalendar;
hr = spControl.QueryInterface(&spCalendar);
if (SUCCEEDED(hr))
{
spCalendar->put_ShowDateSelectors(VARIANT_FALSE);
}
}
}
rect2 = rect;
rect2.top = rect.bottom - 200 + 1;
m_wndEdit.Create(_T("Edit"), m_hWnd, rect2, NULL, WS_CHILD | WS_VISIBLE |
WS_BORDER | ES_AUTOHSCROLL | ES_AUTOVSCROLL | ES_MULTILINE, 0, 2);
return 0;
}
LRESULT OnDestroy(UINT, WPARAM, LPARAM, BOOL&)
{
_pAtlModule->Unlock();
return 0;
}
};
class CHostActiveXModule : public CAtlExeModuleT<CHostActiveXModule>
{
public :
CMainWindow m_wndMain;
// Create the Main window
HRESULT PreMessageLoop(int nCmdShow)
{
HRESULT hr = CAtlExeModuleT<CHostActiveXModule>::PreMessageLoop(nCmdShow);
if (SUCCEEDED(hr))
{
AtlAxWinInit();
hr = S_OK;
RECT rc;
rc.top = rc.left = 100;
rc.bottom = rc.right = 500;
m_wndMain.Create(NULL, rc, _T("Host Calendar") );
m_wndMain.ShowWindow(nCmdShow);
}
return hr;
}
// Clean up. App is exiting.
HRESULT PostMessageLoop()
{
AtlAxWinTerm();
return CAtlExeModuleT<CHostActiveXModule>::PostMessageLoop();
}
};
CHostActiveXModule _AtlModule;
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
UNREFERENCED_PARAMETER(hInstance);
UNREFERENCED_PARAMETER(hPrevInstance);
g_UseMethod = _ttoi(lpCmdLine);
if (ValidateUseMethod())
{
return _AtlModule.WinMain(nCmdShow);
}
else
{
return E_INVALIDARG;
}
}
Consulte também
Referência
Interface de IAxWinHostWindowLic