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Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/gtk/dc.h
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#ifndef __GTKDCH__
	11	#define __GTKDCH__
	12
	13	//-----------------------------------------------------------------------------
	14	// classes
	15	//-----------------------------------------------------------------------------
	16
	17	class WXDLLIMPEXP_CORE wxDC;
	18
	19	//-----------------------------------------------------------------------------
	20	// constants
	21	//-----------------------------------------------------------------------------
	22
	23	#ifndef MM_TEXT
	24	#define MM_TEXT 0
	25	#define MM_ISOTROPIC 1
	26	#define MM_ANISOTROPIC 2
	27	#define MM_LOMETRIC 3
	28	#define MM_HIMETRIC 4
	29	#define MM_TWIPS 5
	30	#define MM_POINTS 6
	31	#define MM_METRIC 7
	32	#endif
	33
	34	//-----------------------------------------------------------------------------
	35	// wxDC
	36	//-----------------------------------------------------------------------------
	37
	38	class WXDLLIMPEXP_CORE wxDC : public wxDCBase
	39	{
	40	public:
	41	wxDC();
	42	~wxDC() { }
	43
	44	#if wxUSE_PALETTE
	45	void SetColourMap( const wxPalette& palette ) { SetPalette(palette); };
	46	#endif // wxUSE_PALETTE
	47
	48	// Resolution in pixels per logical inch
	49	virtual wxSize GetPPI() const;
	50
	51	virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return true; }
	52	virtual void EndDoc() { }
	53	virtual void StartPage() { }
	54	virtual void EndPage() { }
	55
	56	virtual void SetMapMode( int mode );
	57	virtual void SetUserScale( double x, double y );
	58	virtual void SetLogicalScale( double x, double y );
	59	virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
	60	virtual void SetDeviceOrigin( wxCoord x, wxCoord y );
	61
	62	virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
	63
	64	// implementation
	65	// --------------
	66
	67	virtual void ComputeScaleAndOrigin();
	68
	69	wxCoord XDEV2LOG(wxCoord x) const
	70	{
	71	wxCoord new_x = x - m_deviceOriginX;
	72	if (new_x > 0)
	73	return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
	74	else
	75	return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
	76	}
	77	wxCoord XDEV2LOGREL(wxCoord x) const
	78	{
	79	if (x > 0)
	80	return (wxCoord)((double)(x) / m_scaleX + 0.5);
	81	else
	82	return (wxCoord)((double)(x) / m_scaleX - 0.5);
	83	}
	84	wxCoord YDEV2LOG(wxCoord y) const
	85	{
	86	wxCoord new_y = y - m_deviceOriginY;
	87	if (new_y > 0)
	88	return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
	89	else
	90	return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
	91	}
	92	wxCoord YDEV2LOGREL(wxCoord y) const
	93	{
	94	if (y > 0)
	95	return (wxCoord)((double)(y) / m_scaleY + 0.5);
	96	else
	97	return (wxCoord)((double)(y) / m_scaleY - 0.5);
	98	}
	99	wxCoord XLOG2DEV(wxCoord x) const
	100	{
	101	wxCoord new_x = x - m_logicalOriginX;
	102	if (new_x > 0)
	103	return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
	104	else
	105	return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
	106	}
	107	wxCoord XLOG2DEVREL(wxCoord x) const
	108	{
	109	if (x > 0)
	110	return (wxCoord)((double)(x) * m_scaleX + 0.5);
	111	else
	112	return (wxCoord)((double)(x) * m_scaleX - 0.5);
	113	}
	114	wxCoord YLOG2DEV(wxCoord y) const
	115	{
	116	wxCoord new_y = y - m_logicalOriginY;
	117	if (new_y > 0)
	118	return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
	119	else
	120	return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
	121	}
	122	wxCoord YLOG2DEVREL(wxCoord y) const
	123	{
	124	if (y > 0)
	125	return (wxCoord)((double)(y) * m_scaleY + 0.5);
	126	else
	127	return (wxCoord)((double)(y) * m_scaleY - 0.5);
	128	}
	129
	130	protected:
	131	// base class pure virtuals implemented here
	132	virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
	133	virtual void DoGetSizeMM(int* width, int* height) const;
	134
	135	public:
	136	// GTK-specific member variables
	137
	138	// not sure what for, but what is a mm on a screen you don't know the size
	139	// of?
	140	double m_mm_to_pix_x,
	141	m_mm_to_pix_y;
	142
	143	bool m_needComputeScaleX,
	144	m_needComputeScaleY; // not yet used
	145
	146
	147	private:
	148	DECLARE_ABSTRACT_CLASS(wxDC)
	149	};
	150
	151	// this must be defined when wxDC::Blit() honours the DC origian and needed to
	152	// allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
	153	// 2.3.[23]
	154	#ifndef wxHAS_WORKING_GTK_DC_BLIT
	155	#define wxHAS_WORKING_GTK_DC_BLIT
	156	#endif
	157
	158	#endif // __GTKDCH__