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Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dc.h
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#ifndef __GTKDCH__
	12	#define __GTKDCH__
	13
	14	#ifdef __GNUG__
	15	#pragma interface
	16	#endif
	17
	18	//-----------------------------------------------------------------------------
	19	// classes
	20	//-----------------------------------------------------------------------------
	21
	22	class wxDC;
	23
	24	//-----------------------------------------------------------------------------
	25	// constants
	26	//-----------------------------------------------------------------------------
	27
	28	#define MM_TEXT 0
	29	#define MM_ISOTROPIC 1
	30	#define MM_ANISOTROPIC 2
	31	#define MM_LOMETRIC 3
	32	#define MM_HIMETRIC 4
	33	#define MM_TWIPS 5
	34	#define MM_POINTS 6
	35	#define MM_METRIC 7
	36
	37	//-----------------------------------------------------------------------------
	38	// wxDC
	39	//-----------------------------------------------------------------------------
	40
	41	class wxDC : public wxDCBase
	42	{
	43	DECLARE_ABSTRACT_CLASS(wxDC)
	44
	45	public:
	46	wxDC();
	47	~wxDC() { }
	48
	49	void SetColourMap( const wxPalette& palette ) { SetPalette(palette); };
	50
	51	// the first two must be overridden and called
	52	virtual void DestroyClippingRegion();
	53
	54	// Resolution in pixels per logical inch
	55	virtual wxSize GetPPI() const;
	56
	57	virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return TRUE; }
	58	virtual void EndDoc() { }
	59	virtual void StartPage() { }
	60	virtual void EndPage() { }
	61
	62	virtual void SetMapMode( int mode );
	63	virtual void SetUserScale( double x, double y );
	64	virtual void SetLogicalScale( double x, double y );
	65	virtual void SetLogicalOrigin( long x, long y );
	66	virtual void SetDeviceOrigin( long x, long y );
	67
	68	virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
	69
	70	// implementation
	71	// --------------
	72
	73	virtual void ComputeScaleAndOrigin();
	74
	75	long XDEV2LOG(long x) const
	76	{
	77	long new_x = x - m_deviceOriginX;
	78	if (new_x > 0)
	79	return (long)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
	80	else
	81	return (long)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
	82	}
	83	long XDEV2LOGREL(long x) const
	84	{
	85	if (x > 0)
	86	return (long)((double)(x) / m_scaleX + 0.5);
	87	else
	88	return (long)((double)(x) / m_scaleX - 0.5);
	89	}
	90	long YDEV2LOG(long y) const
	91	{
	92	long new_y = y - m_deviceOriginY;
	93	if (new_y > 0)
	94	return (long)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
	95	else
	96	return (long)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
	97	}
	98	long YDEV2LOGREL(long y) const
	99	{
	100	if (y > 0)
	101	return (long)((double)(y) / m_scaleY + 0.5);
	102	else
	103	return (long)((double)(y) / m_scaleY - 0.5);
	104	}
	105	long XLOG2DEV(long x) const
	106	{
	107	long new_x = x - m_logicalOriginX;
	108	if (new_x > 0)
	109	return (long)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
	110	else
	111	return (long)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
	112	}
	113	long XLOG2DEVREL(long x) const
	114	{
	115	if (x > 0)
	116	return (long)((double)(x) * m_scaleX + 0.5);
	117	else
	118	return (long)((double)(x) * m_scaleX - 0.5);
	119	}
	120	long YLOG2DEV(long y) const
	121	{
	122	long new_y = y - m_logicalOriginY;
	123	if (new_y > 0)
	124	return (long)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
	125	else
	126	return (long)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
	127	}
	128	long YLOG2DEVREL(long y) const
	129	{
	130	if (y > 0)
	131	return (long)((double)(y) * m_scaleY + 0.5);
	132	else
	133	return (long)((double)(y) * m_scaleY - 0.5);
	134	}
	135
	136	protected:
	137	// base class pure virtuals implemented here
	138	virtual void DoSetClippingRegion(long x, long y, long width, long height);
	139	virtual void DoGetSize(int width, int height) const;
	140	virtual void DoGetSizeMM(int* width, int* height) const;
	141
	142	public:
	143	// GTK-specific member variables
	144
	145	// not sure what for, but what is a mm on a screen you don't know the size
	146	// of?
	147	double m_mm_to_pix_x,
	148	m_mm_to_pix_y;
	149
	150	bool m_needComputeScaleX,
	151	m_needComputeScaleY; // not yet used
	152
	153	float m_scaleFactor; // wxPSDC wants to have this. Will disappear.
	154	};
	155
	156	#endif // __GTKDCH__