POLYLINE.H

/* 
* POLYLINE.H
* Cosmo Chapter 23
*
* Definitions and function prototypes for the PolyLine window
* class that can be treated like its own control.
*
* Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Microsoft
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/


#ifndef _POLYLINE_H_
#define _POLYLINE_H_

//Versioning.
#define VERSIONMAJOR 2
#define VERSIONMINOR 0
#define VERSIONCURRENT 0x00020000

//Classname
#define SZCLASSPOLYLINE TEXT("polyline")

//Stream Name that holds the data
#define SZSTREAM OLETEXT("CONTENTS")
#define SZOLE1STREAM OLETEXT("\1Ole10Native")

#define HIMETRIC_PER_INCH 2540
#define CPOLYLINEPOINTS 20

//Window extra bytes and offsets
#define CBPOLYLINEWNDEXTRA (sizeof(LONG))
#define PLWL_STRUCTURE 0


//Version 2.0 Polyline Structure
typedef struct tagPOLYLINEDATA
{
WORD wVerMaj; //Major version number.
WORD wVerMin; //Minor version number.
WORD cPoints; //Number of points.
short fReserved; //Obsolete from v1.0
RECTS rc; //Rectangle of this figure
POINTS rgpt[CPOLYLINEPOINTS]; //Points (0-32767 grid)

//Version 2.0 additions
COLORREF rgbBackground; //Background color
COLORREF rgbLine; //Line color
short iLineStyle; //Line style
} POLYLINEDATA, *PPOLYLINEDATA;

#define CBPOLYLINEDATA sizeof(POLYLINEDATA)
#define CBPOLYLINEDATA20 sizeof(POLYLINEDATA)


//Version 1.0 Polyline Structure
typedef struct tagPOLYLINEDATA10
{
WORD wVerMaj; //Major version number.
WORD wVerMin; //Minor version number.
WORD cPoints; //Number of points.
short fDrawEntire; //Flag to draw entire figure
RECTS rc; //Rectangle of this figure
POINTS rgpt[CPOLYLINEPOINTS]; //Points (scaled to rc)
} POLYLINEDATA10, *PPOLYLINEDATA10;

#define CBPOLYLINEDATA10 sizeof(POLYLINEDATA10)


//POLYWIN.CPP
LRESULT APIENTRY PolylineWndProc(HWND, UINT, WPARAM, LPARAM);


class CPolyline : public CWindow
{
friend LRESULT APIENTRY PolylineWndProc(HWND, UINT, WPARAM
, LPARAM);

private:
POLYLINEDATA m_pl;

class CPolylineAdviseSink * m_pAdv;

public:
//This is for CFigure to look at when writing its storage.
BOOL m_fReadFromOLE10;

private:
HFILE OpenFileW(LPTSTR, LPOFSTRUCT, UINT);
void PointScale(LPRECT, LPPOINTS, BOOL);
void Draw(HDC, BOOL, BOOL);
void RectConvertMappings(LPRECT, BOOL);

public:
CPolyline(HINSTANCE);
~CPolyline(void);

BOOL Init(HWND, LPRECT, DWORD, UINT
, class CPolylineAdviseSink *);

void New(void);
BOOL Undo(void);

//File functions
LONG ReadFromStorage(LPSTORAGE);
LONG WriteToStorage(LPSTORAGE, LONG);

LONG ReadFromStream(LPSTREAM);
LONG WriteToStream(LPSTREAM, LONG);

LONG ReadFromFile(LPTSTR);
LONG WriteToFile(LPTSTR, LONG);

//Data transfer functions
LONG DataSet(PPOLYLINEDATA, BOOL, BOOL);
LONG DataGet(PPOLYLINEDATA, LONG);
LONG DataSetMem(HGLOBAL, BOOL, BOOL, BOOL);
LONG DataGetMem(LONG, HGLOBAL *);
HBITMAP RenderBitmap(void);
HMETAFILE RenderMetafile(void);
HGLOBAL RenderMetafilePict(void);

void RectGet(LPRECT);
void SizeGet(LPRECT);
void RectSet(LPRECT, BOOL);
void SizeSet(LPRECT, BOOL);
COLORREF ColorSet(UINT, COLORREF);
COLORREF ColorGet(UINT);
UINT LineStyleSet(UINT);
UINT LineStyleGet(void);
};

typedef CPolyline *PCPolyline;


//Error values for data transfer functions
#define POLYLINE_E_NONE 0
#define POLYLINE_E_UNSUPPORTEDVERSION -1
#define POLYLINE_E_INVALIDPOINTER -2
#define POLYLINE_E_READFAILURE -3
#define POLYLINE_E_WRITEFAILURE -4




class CPolylineAdviseSink
{
private:
LPVOID m_pv; //Customizable structure

public:
CPolylineAdviseSink(LPVOID);
~CPolylineAdviseSink(void);

void OnPointChange(void);
void OnSizeChange(void);
void OnDataChange(void);
void OnColorChange(void);
void OnLineStyleChange(void);
};

typedef CPolylineAdviseSink *PCPolylineAdviseSink;


//Color indices for color messages
#define POLYLINECOLOR_BACKGROUND 0
#define POLYLINECOLOR_LINE 1



#endif //_POLYLINE_H_