An extendable report editor

// Canvas.h: interface for the CCanvas class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_CANVAS_H__31413FAA_DC0C_4694_AF72_F7B77FEA8316__INCLUDED_)
#define AFX_CANVAS_H__31413FAA_DC0C_4694_AF72_F7B77FEA8316__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "common.h"
#include <OLECTL.H>

/**********
������ô��Ϊ�����еĻ�ͼ����һ������ľ�����Ļ��
��������ʾ������ͼ��ֻ�����������Ļ�ϵ�һ���֣�Ҳ
����һ��View,�������attached_dc��ô�Ͱ����DC����
��ǰ��View, �������attached_dc��ô��this->hdc����
��ǰ��view.
**********/

class CCanvas{
public:
    HWND hparent;
    HDC hdc;
    HBITMAP hbitmap,old_hbitmap;
    HPEN hpen,old_pen;
    HBRUSH hbrush,old_brush;
    HFONT hfont,old_font;
	int offx,offy;
	int left,top,width,height;
	bool is_attached_hdc;
public:
	int SetBrush(UINT style,COLORREF color,LONG hatch);
	int UpdateParent();
	int SetTransparentBkMode();
	int AttachDC(HDC hdc);
	COLORREF GetPixel(int x,int y);
	int SetStockFont(int fnObject);
	int SetFont(LOGFONT *logfont);
	int SetTextColor(COLORREF color);
	int SetTextBkColor(COLORREF color);
	int SetPen(int fnPenStyle,int nWidth,COLORREF crColor);
	int SetHatchBrush(int fnStyle,COLORREF clrref);
	int SetSolidBrush(COLORREF clrref);
	int TextOut(int x,int y,char *str);
	int TextOutF(int x,int y,char *szFormat, ...);
	int TextOutEx(int x,int y,RECT &r,char *str);
	int FillRect(int l,int t,int w,int h);
	int DrawRect(COLORREF color);
	int DrawRect(int l,int t,int w,int h,COLORREF color);
	int DrawRect(int l,int t,int w,int h);
	int LoadBitMap(DWORD bmp_id);
	int LineTo(int x,int y);
	int CCanvas::Ellipse(int l,int t,int r,int b);
	int Arc(int nLeftRect,int nTopRect,int nRightRect,int nBottomRect,int nXRadial1,int nYRadial1,int nXRadial2,int nYRadial2);
	int MoveTo(int x,int y);
	int DrawToScreen();
	int Clear();
	int StretchToDC(HDC hdc_des,int width,int height);
	int SaveBmp(char *fn);
	int SetX(int x);
	int SetY(int y);
	int DrawTextEx(char *str,RECT r,UINT dwDTFormat,LPDRAWTEXTPARAMS lpDTParams);
	int SetPixel(int x,int y,COLORREF color);
	int Copy(HDC hdc_src);
	int Paste(HDC hdc_des);
	int SetParent(HWND hp);
	int SetPos(int l,int t);
	int SetSize(int w,int h);
	int CreateCompatibleDC(HDC hdc);
    CCanvas();
    virtual ~CCanvas();
    int Init();
    int Destroy();
    int Copy(CCanvas *p);
    int Comp(CCanvas *p);
    int Print();
    int InitBasic();
};
/////////////////////////////////////////////
class CDiBMP{
public:
    BITMAPFILEHEADER * pbmfh ;
    int width;
    int height;
public:
	int DibLoadImage (PTSTR pstrFileName);
	int Paste(HDC hdc_des);
    CDiBMP();
    virtual ~CDiBMP();
    int Init();
    int Destroy();
    int InitBasic();
};
/////////////////////////////////////////////
//CoInitialize() and CoUninitialize() must 
//be called before use CJpeg
/////////////////////////////////////////////
class CJepg{
public:
    IStream * pStream;
    IPicture * pPicture;
	HGLOBAL hmem;
	HDC i_hdc;
public:
	int SetIDC(HDC hdc);
	int Draw(int x,int y);
	int Draw(int x,int y,int w,int h);
	int Draw(RECT r);
	int GetHeight();
	int GetWidth();
	int LoadFromFile(char *fn);
    CJepg();
    virtual ~CJepg();
    int Init();
    int Destroy();
    int InitBasic();
};
/////////////////////////////////////////////
#endif // !defined(AFX_CANVAS_H__31413FAA_DC0C_4694_AF72_F7B77FEA8316__INCLUDED_)