windows-server-2003/shell/ext/shimgvw/prevctrl.h

// PrevCtrl.h : Declaration of the CPreview

#ifndef __PREVCTRL_H_
#define __PREVCTRL_H_

#include "resource.h"       // main symbols
#include "PrevWnd.h"
#include "Events.h"

int IsVK_TABCycler(MSG *pMsg);

/////////////////////////////////////////////////////////////////////////////
// CPreview
class ATL_NO_VTABLE CPreview :
        public CComObjectRootEx<CComSingleThreadModel>,
        public CComCoClass<CPreview, &CLSID_Preview>,
        public CComControl<CPreview>,
        public CStockPropImpl<CPreview, IPreview2, &IID_IPreview2, &LIBID_PREVIEWLib>,
        public CStockPropImpl<CPreview, IPreview3, &IID_IPreview3, &LIBID_PREVIEWLib>,
        public IProvideClassInfo2Impl<&CLSID_Preview, NULL, &LIBID_PREVIEWLib>,
        public IPersistPropertyBagImpl<CPreview>,           // So we can read <PARAM>'s from our object tag
        public IPersistStorageImpl<CPreview>,               // required for Embeddable objects
        public IOleObjectImpl<CPreview>,                    // required for Embeddable objects
        public IDataObjectImpl<CPreview>,                   // required for Embeddable objects
        public IQuickActivateImpl<CPreview>,
        public IOleControlImpl<CPreview>,   // REVIEW: will IOleControl::GetControlInfo help with my keyboard problems?
        public IOleInPlaceActiveObjectImpl<CPreview>,       // handles resizing, active state, TranslateAccelerator
        public IViewObjectExImpl<CPreview>,                 // for flicker-free drawing support
        public IOleInPlaceObjectWindowlessImpl<CPreview>,   // allow for windowless operation (we don't use windowless, should we be using this interface?)
        public CPreviewEvents<CPreview>,                    // our event code for sending events to our container
        public IConnectionPointContainerImpl<CPreview>,     // Connection Point Container for our outgoing event hooks.
        public IObjectSafetyImpl<CPreview, INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA>,// allows this control to be scripted
        public IPersistStreamInitImpl<CPreview>,
        public IObjectWithSiteImpl<CPreview>
{
private:

    DWORD _dwConnectionCookie;
    IFolderView *_pfv;

public:
    CPreviewWnd m_cwndPreview;

    CPreview()
    {
        // we want to be run in a window and never windowless
        m_bWindowOnly = TRUE;
        m_cwndPreview.Initialize(NULL, CONTROL_MODE, FALSE); // ISSUE: we don't handle failure of initialization in low-memory case
    }

    ~CPreview()
    {
        ATOMICRELEASE(_pfv);
    }

DECLARE_REGISTRY_RESOURCEID(IDR_PREVIEW)

DECLARE_WND_CLASS( TEXT("ShImgVw:CPreview") );

BEGIN_COM_MAP(CPreview)
    COM_INTERFACE_ENTRY(IPreview2)
    COM_INTERFACE_ENTRY(IPreview3)
    COM_INTERFACE_ENTRY_IID(IID_IDispatch, IPreview2)
    COM_INTERFACE_ENTRY_IID(IID_IPreview, IPreview2)
    COM_INTERFACE_ENTRY_IMPL(IViewObjectEx)
    COM_INTERFACE_ENTRY(IObjectSafety)
    COM_INTERFACE_ENTRY_IMPL_IID(IID_IViewObject2, IViewObjectEx)
    COM_INTERFACE_ENTRY_IMPL_IID(IID_IViewObject, IViewObjectEx)
    COM_INTERFACE_ENTRY_IMPL(IOleInPlaceObjectWindowless)
    COM_INTERFACE_ENTRY_IMPL_IID(IID_IOleInPlaceObject, IOleInPlaceObjectWindowless)
    COM_INTERFACE_ENTRY_IMPL_IID(IID_IOleWindow, IOleInPlaceObjectWindowless)
    COM_INTERFACE_ENTRY_IMPL(IOleInPlaceActiveObject)
    COM_INTERFACE_ENTRY_IMPL(IOleControl)
    COM_INTERFACE_ENTRY_IMPL(IOleObject)
    COM_INTERFACE_ENTRY_IMPL(IObjectWithSite)
    COM_INTERFACE_ENTRY_IMPL(IQuickActivate)
    COM_INTERFACE_ENTRY_IMPL(IPersistPropertyBag)
    COM_INTERFACE_ENTRY_IMPL(IPersistStorage)
    COM_INTERFACE_ENTRY(IPersistStreamInit)
    COM_INTERFACE_ENTRY_IMPL(IDataObject)
    COM_INTERFACE_ENTRY(IProvideClassInfo)
    COM_INTERFACE_ENTRY(IProvideClassInfo2)
    COM_INTERFACE_ENTRY_IMPL(IConnectionPointContainer)
END_COM_MAP()

BEGIN_CONNECTION_POINT_MAP(CPreview)
    CONNECTION_POINT_ENTRY(DIID_DPreviewEvents)
END_CONNECTION_POINT_MAP()

BEGIN_PROPERTY_MAP(CPreview)
    PROP_PAGE(CLSID_StockColorPage)
END_PROPERTY_MAP()

BEGIN_MSG_MAP(CPreview)
    MESSAGE_HANDLER(WM_CREATE, OnCreate)
    MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBkgnd)
    MESSAGE_HANDLER(WM_KILLFOCUS, OnKillFocus)
    MESSAGE_HANDLER(WM_PAINT, OnPaint)
    MESSAGE_HANDLER(WM_SETFOCUS, OnSetFocus)
    MESSAGE_HANDLER(WM_SIZE, OnSize)
    MESSAGE_HANDLER(WM_ACTIVATE, OnActivate)
END_MSG_MAP()

    // IViewObjectEx
    STDMETHOD(GetViewStatus)(DWORD* pdwStatus)
    {
        ATLTRACE(_T("IViewObjectExImpl::GetViewStatus\n"));
        *pdwStatus = VIEWSTATUS_SOLIDBKGND | VIEWSTATUS_OPAQUE;
        return S_OK;
    }

    // IOleInPlaceActiveObjectImpl
    STDMETHOD(TranslateAccelerator)( LPMSG lpmsg );
    STDMETHOD(OnFrameWindowActivate)( BOOL fActive );

    // IPersistPropertyBag
    STDMETHOD(Load)(IPropertyBag * pPropBag, IErrorLog * pErrorLog);
    STDMETHOD(Save)(IPropertyBag * pPropBag, BOOL fClearDirty, BOOL fSaveAllProperties) {return S_OK;}

    // IObjectSafety
    STDMETHOD(GetInterfaceSafetyOptions)(REFIID riid, DWORD *pdwSupportedOptions, DWORD *pdwEnabledOptions);
    STDMETHOD(SetInterfaceSafetyOptions)(REFIID riid, DWORD dwSupportedOptions, DWORD dwEnabledOptions);

    // IPersistStreamInit
    STDMETHOD(Load)(IStream * pStm);
    STDMETHOD(Save)(IStream * pStm, BOOL fClearDirty) {return S_OK;}

    // IOleObject
    STDMETHODIMP SetClientSite(IOleClientSite *pClientSite);

    // IObjectWithSite
    STDMETHODIMP SetSite(IUnknown* punkSite);

    // IDispatch
    STDMETHODIMP Invoke(DISPID dispidMember, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS* pdispparams, 
                        VARIANT* pvarResult, EXCEPINFO* pexcepinfo, UINT* puArgErr);

public:
    // Control message handlers
    LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnActivate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnSetFocus(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    HRESULT OnDrawAdvanced(ATL_DRAWINFO& di);
    LRESULT OnEraseBkgnd(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);

public:
    // IPreview, IPreview3
    STDMETHOD(get_printable)(/*[out, retval]*/ BOOL *pVal);
    STDMETHOD(put_printable)(/*[in]*/ BOOL newVal);
    STDMETHOD(get_cxImage)(/*[out, retval]*/ long *pVal);
    STDMETHOD(get_cyImage)(/*[out, retval]*/ long *pVal);
    STDMETHOD(ShowFile)(BSTR bstrFileName, int iSelectCount);
    STDMETHOD(Show)(VARIANT var);

    // IPreview2, IPreview3
    STDMETHOD(Zoom)(/*[in]*/ int iSelectCount);
    STDMETHOD(BestFit)();
    STDMETHOD(ActualSize)();
    STDMETHOD(SlideShow)();

    // IPreview3
    STDMETHOD(Rotate)(/*[in]*/ DWORD dwAngle);
    STDMETHOD(SaveAs)(/*[in]*/BSTR bstrPath);
    STDMETHOD(SetWallpaper)(/*[in]*/BSTR bstrWallpaper);
    STDMETHOD(ShowFile)(BSTR bstrFileName);

private:
    BOOL IsHostLocalZone(DWORD dwFlags, HRESULT *phr);
    STDMETHOD(_ProcessSelection) (void);
};

#endif //__PREVCTRL_H_