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Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dc.h
	3	// Purpose: wxDC class
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 01/02/97
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifndef _WX_DC_H_
	13	#define _WX_DC_H_
	14
	15	#ifdef __GNUG__
	16	#pragma interface "dc.h"
	17	#endif
	18
	19	class WXDLLEXPORT wxDC : public wxDCBase
	20	{
	21	DECLARE_DYNAMIC_CLASS(wxDC)
	22
	23	public:
	24	wxDC();
	25	~wxDC();
	26
	27	// implement base class pure virtuals
	28	// ----------------------------------
	29
	30	virtual void Clear();
	31
	32	virtual bool StartDoc(const wxString& message);
	33	virtual void EndDoc();
	34
	35	virtual void StartPage();
	36	virtual void EndPage();
	37
	38	virtual void SetFont(const wxFont& font);
	39	virtual void SetPen(const wxPen& pen);
	40	virtual void SetBrush(const wxBrush& brush);
	41	virtual void SetBackground(const wxBrush& brush);
	42	virtual void SetBackgroundMode(int mode);
	43	virtual void SetPalette(const wxPalette& palette);
	44
	45	virtual void DestroyClippingRegion();
	46
	47	virtual long GetCharHeight() const;
	48	virtual long GetCharWidth() const;
	49	virtual void GetTextExtent(const wxString& string,
	50	long x, long y,
	51	long *descent = NULL,
	52	long *externalLeading = NULL,
	53	wxFont *theFont = NULL) const;
	54
	55	virtual bool CanDrawBitmap() const;
	56	virtual bool CanGetTextExtent() const;
	57	virtual int GetDepth() const;
	58	virtual wxSize GetPPI() const;
	59
	60	virtual void SetMapMode(int mode);
	61	virtual void SetUserScale(double x, double y);
	62	virtual void SetSystemScale(double x, double y);
	63	virtual void SetLogicalScale(double x, double y);
	64	virtual void SetLogicalOrigin(long x, long y);
	65	virtual void SetDeviceOrigin(long x, long y);
	66	virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
	67	virtual void SetLogicalFunction(int function);
	68
	69	// implementation from now on
	70	// --------------------------
	71
	72	virtual void SetRop(WXHDC cdc);
	73	virtual void DoClipping(WXHDC cdc);
	74	virtual void SelectOldObjects(WXHDC dc);
	75
	76	wxWindow *GetWindow() const { return m_canvas; }
	77	void SetWindow(wxWindow *win) { m_canvas = win; }
	78
	79	WXHDC GetHDC() const { return m_hDC; }
	80	void SetHDC(WXHDC dc, bool bOwnsDC = FALSE)
	81	{
	82	m_hDC = dc;
	83	m_bOwnsDC = bOwnsDC;
	84	}
	85
	86	protected:
	87	virtual void DoFloodFill(long x, long y, const wxColour& col,
	88	int style = wxFLOOD_SURFACE);
	89
	90	virtual bool DoGetPixel(long x, long y, wxColour *col) const;
	91
	92	virtual void DoDrawPoint(long x, long y);
	93	virtual void DoDrawLine(long x1, long y1, long x2, long y2);
	94
	95	virtual void DoDrawArc(long x1, long y1,
	96	long x2, long y2,
	97	long xc, long yc);
	98	virtual void DoDrawEllipticArc(long x, long y, long w, long h,
	99	double sa, double ea);
	100
	101	virtual void DoDrawRectangle(long x, long y, long width, long height);
	102	virtual void DoDrawRoundedRectangle(long x, long y,
	103	long width, long height,
	104	double radius);
	105	virtual void DoDrawEllipse(long x, long y, long width, long height);
	106
	107	virtual void DoCrossHair(long x, long y);
	108
	109	virtual void DoDrawIcon(const wxIcon& icon, long x, long y);
	110	virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
	111	bool useMask = FALSE);
	112
	113	virtual void DoDrawText(const wxString& text, long x, long y);
	114
	115	virtual bool DoBlit(long xdest, long ydest, long width, long height,
	116	wxDC *source, long xsrc, long ysrc,
	117	int rop = wxCOPY, bool useMask = FALSE);
	118
	119	// this is gnarly - we can't even call this function DoSetClippingRegion()
	120	// because of virtual function hiding
	121	virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
	122	virtual void DoSetClippingRegion(long x, long y,
	123	long width, long height);
	124	virtual void DoGetClippingRegion(long x, long y,
	125	long width, long height)
	126	{
	127	GetClippingBox(x, y, width, height);
	128	}
	129
	130	virtual void DoGetSize(int width, int height) const;
	131	virtual void DoGetSizeMM(int* width, int* height) const;
	132
	133	virtual void DoDrawLines(int n, wxPoint points[],
	134	long xoffset, long yoffset);
	135	virtual void DoDrawPolygon(int n, wxPoint points[],
	136	long xoffset, long yoffset,
	137	int fillStyle = wxODDEVEN_RULE);
	138
	139	#if wxUSE_SPLINES
	140	virtual void DoDrawSpline(wxList *points);
	141	#endif // wxUSE_SPLINES
	142
	143	// MSW-specific member variables
	144	int m_windowExtX;
	145	int m_windowExtY;
	146
	147	// the window associated with this DC (may be NULL)
	148	wxWindow *m_canvas;
	149
	150	wxBitmap m_selectedBitmap;
	151
	152	// TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
	153	bool m_bOwnsDC:1;
	154
	155	// our HDC and its usage count: we only free it when the usage count drops
	156	// to 0
	157	WXHDC m_hDC;
	158	int m_hDCCount;
	159
	160	// Store all old GDI objects when do a SelectObject, so we can select them
	161	// back in (this unselecting user's objects) so we can safely delete the
	162	// DC.
	163	WXHBITMAP m_oldBitmap;
	164	WXHPEN m_oldPen;
	165	WXHBRUSH m_oldBrush;
	166	WXHFONT m_oldFont;
	167	WXHPALETTE m_oldPalette;
	168	};
	169
	170	#endif
	171	// _WX_DC_H_