FVTEXT.H
//THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
//ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
//THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright 1994 - 1998 Microsoft Corporation. All Rights Reserved.
//
//PROGRAM: FVTEXT.H
//
//PURPOSE: Classes that implement the CFileViewer object for integration
// with the Windows 95 Explorer. Necessary modifications for a
// custom viewer marked with MODIFY
//
//PLATFORMS:Windows 95
//
//SPECIAL INSTRUCTIONS:
//
//DO NOT USE THESE GUIDS: These are for this sample ONLY
//File CLSID for the text compound file example: this is nothing official.
//Forward class references
DEFINE_GUID(CLSID_SampleTextFile, 0x00021116, 0, 0, 0xC0,0,0,0,0,0,0,0x46);
//MODIFY: Define your custom FileViewer CLSID(s) here.
DEFINE_GUID(CLSID_FileViewerText, 0x00021117, 0, 0, 0xC0,0,0,0,0,0,0,0x46);
#ifndef _FVTEXT_H_
#define _FVTEXT_H_
class CImpIPersistFile;
typedef class CImpIPersistFile *PIMPIPERSISTFILE;
class CImpIFileViewer;
typedef class CImpIFileViewer *PIMPIFILEVIEWER;
//FVPROC.CPP
//MODIFY: Window procedures for frame and viewport windows
long WINAPI FileViewerFrameProc(HWND, UINT, WPARAM, LPARAM);
//Extra bytes for frame
#define CBWNDEXTRAFRAME sizeof(LPVOID)
#define FVWL_OBJECTPOINTER 0
/*
* MODIFY: Change viewport window procedure and defintions
* to be specific to the file viewer in use.
*/
long WINAPI ViewportWndProc(HWND, UINT, WPARAM, LPARAM);
//Extra bytes for viewport
#define CBWNDEXTRAVIEWPORT sizeof(LPVOID)
#define VPWL_OBJECTPOINTER 0
BOOL APIENTRY AboutProc(HWND, UINT, WPARAM, LPARAM);
//Child window IDs
#define ID_TOOLBAR 50
#define ID_STATUSBAR 51
#define ID_VIEWPORT 52
//Options for CFileViewer::FontChange.
typedef enum
{
VIEWFONT_SELECT=0,
VIEWFONT_INCREASESIZE,
VIEWFONT_DECREASESIZE
} VIEWFONTOPTION;
/*
* Limits to font sizes for the Font dialog. The increase and
* decrease buttons change the point size by different amounts
* (FONTSIZEDELTA*) depending on the size of the current font
* (where it falls in the FONTSIZETHRESHOLD*). Note that these
* values have to be multiplied by logical_pixels_per_inch/72
* on the display to be accurate. See CFileViewer::FontChange.
*
* Of course, there are better ways to do this that are font
* specific. This way works well for stock fonts (Arial, Courier
* New, Times New Roman).
*/
#define FONTSIZETHRESHOLDMIN 4
#define FONTSIZETHRESHOLDLOW 32
#define FONTSIZETHRESHOLDMID 48
#define FONTSIZETHRESHOLDMAX 120
#define FONTSIZEDELTASMALL 2 //4 to 32pt
#define FONTSIZEDELTAMEDIUM 8 //32 to 48pt
#define FONTSIZEDELTALARGE 24 //48 to 120pt
//FVTEXT.CPP, FVINIT.CPP
/*
* MODIFY: Change this CFileViewer object to be more specific to
* your implementations. Specific parts are listed below.
*
* The CFileViewer object is implemented in its own class with its own
* IUnknown to support aggregation. It contains two interface
* implementation objects (CImpIPersistFile and CImpIFileViewer)
* to implement the externally exposed interfaces.
*/
class CFileViewer : public IUnknown
{
//Make any contained interfaces your friends
friend class CImpIPersistFile;
friend class CImpIFileViewer;
friend long WINAPI FileViewerFrameProc(HWND, UINT, WPARAM, LPARAM);
friend long WINAPI ViewportWndProc(HWND, UINT, WPARAM, LPARAM);
protected:
//NOTE: These members usually need no modification
ULONG m_cRef; //Object reference count
LPUNKNOWN m_pUnkOuter; //Controlling unknown
HINSTANCE m_hInst; //Module instance
PFNDESTROYED m_pfnDestroy; //To call on closure
LPFILEVIEWERSITE m_lpfsi; // file viewer site
CLSID m_clsID; //CLSID of this FileViewer
LPSTR m_pszPath; //Path from IPersitFile::Load
DWORD m_grfMode; //Open mode for the file
BOOL m_fLoadCalled; //Load called already?
BOOL m_fShowInit; //ShowInitialize called?
BOOL m_fClassReg; //RegisterClass work?
BOOL m_fPostQuitMsg; // Should destroy post quit
HWND m_hWnd; //Main window
HWND m_hWndOld; // Old Main window.
HWND m_hWndToolbar; //Child windows
HWND m_hWndStatus;
HWND m_hWndViewport;
HACCEL m_hAccel;
UINT m_cyTools; //Child window heights
UINT m_cyStatus;
BOOL m_fToolsVisible; //Visible child windows.
BOOL m_fStatusVisible;
PCStringTable m_pST; //Stringtable object
PCStatusHelper m_pSH; //For WM_MENUSELECT
//Interface implementations
PIMPIPERSISTFILE m_pIPersistFile;
PIMPIFILEVIEWER m_pIFileViewer;
LPFVSHOWINFO m_pvsi;
/*
* MODIFY: Change these to your own FileViewer specifics.
* The variables here are specific to text viewing.
*/
HGLOBAL m_hMemText; //Loaded text.
HFONT m_hFont; //Current viewport font
int m_cyPPI; //logical pix/inch
int m_xPos; //Scroll positions
int m_yPos;
protected:
BOOL FInitFrameControls(void);
HRESULT FileLoad(void);
void OnCommand(WORD, WORD, HWND);
void ChildrenResize(void);
void ViewportResize(void);
BOOL FOpenAs(void);
LPSTR PszToolTip(UINT);
//MODIFY: These may be irrelevant for a custom viewer
void ViewportScrollSet(void);
void FontChange(VIEWFONTOPTION);
void ReplaceWindowModeChange(void);
BOOL DropFiles(HDROP);
public:
CFileViewer(LPUNKNOWN, HINSTANCE, PFNDESTROYED);
~CFileViewer(void);
HRESULT Init(void); //Called from IClassFactory::CreateInstance
LPSTR String(UINT); //inline--see FVTEXT.CPP
LPVOID MemAlloc(ULONG); //IMalloc helpers
void MemFree(LPVOID);
//IFileViewer implementataions (called from CImpIFileViewer)
STDMETHODIMP FileShowInit(LPFILEVIEWERSITE lpfsi);
STDMETHODIMP FileShow(LPFVSHOWINFO pvsi);
STDMETHODIMP PrintTo(LPSTR, BOOL);
//Non-delegating object IUnknown interface
STDMETHODIMP QueryInterface(REFIID, PPVOID);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
};
typedef CFileViewer * PCFileViewer;
/*
* Interface implementations for the CFileViewer object.
*/
//IPERFILE.CPP
class CImpIPersistFile : public IPersistFile
{
private:
PCFileViewer m_pObj; //Back pointer to object
LPUNKNOWN m_pUnkOuter; //Controlling unknown
public:
CImpIPersistFile(PCFileViewer, LPUNKNOWN);
~CImpIPersistFile(void);
//IUnknown members that delegate to m_pUnkOuter.
STDMETHODIMP QueryInterface(REFIID, PPVOID);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
//IPersist members
STDMETHODIMP GetClassID(LPCLSID);
//IPersistFile members
STDMETHODIMP IsDirty(void);
STDMETHODIMP Load(LPCOLESTR, DWORD);
STDMETHODIMP Save(LPCOLESTR, BOOL);
STDMETHODIMP SaveCompleted(LPCOLESTR);
STDMETHODIMP GetCurFile(LPOLESTR *);
};
//IFILEVW.CPP
class CImpIFileViewer : public IFileViewer
{
private:
PCFileViewer m_pObj; //Back pointer to object
LPUNKNOWN m_pUnkOuter; //Controlling unknown
public:
CImpIFileViewer(PCFileViewer, LPUNKNOWN);
~CImpIFileViewer(void);
//IUnknown members that delegate to m_pUnkOuter.
STDMETHODIMP QueryInterface(REFIID, PPVOID);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
//IFileViewer members
STDMETHODIMP PrintTo(LPSTR, BOOL);
STDMETHODIMP ShowInitialize(LPFILEVIEWERSITE lpfsi);
STDMETHODIMP Show(LPFVSHOWINFO pvsi);
};
#endif //_FVTEXT_H_