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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	public:
	44	wxDC();
	45	~wxDC() { }
	46
	47	void SetColourMap( const wxPalette& palette ) { SetPalette(palette); };
	48
	49	// the first two must be overridden and called
	50	virtual void DestroyClippingRegion();
	51
	52	// Resolution in pixels per logical inch
	53	virtual wxSize GetPPI() const;
	54
	55	virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return TRUE; }
	56	virtual void EndDoc() { }
	57	virtual void StartPage() { }
	58	virtual void EndPage() { }
	59
	60	virtual void SetMapMode( int mode );
	61	virtual void SetUserScale( double x, double y );
	62	virtual void SetLogicalScale( double x, double y );
	63	virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
	64	virtual void SetDeviceOrigin( wxCoord x, wxCoord y );
	65
	66	virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
	67
	68	// implementation
	69	// --------------
	70
	71	virtual void ComputeScaleAndOrigin();
	72
	73	wxCoord XDEV2LOG(wxCoord x) const
	74	{
	75	wxCoord new_x = x - m_deviceOriginX;
	76	if (new_x > 0)
	77	return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
	78	else
	79	return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
	80	}
	81	wxCoord XDEV2LOGREL(wxCoord x) const
	82	{
	83	if (x > 0)
	84	return (wxCoord)((double)(x) / m_scaleX + 0.5);
	85	else
	86	return (wxCoord)((double)(x) / m_scaleX - 0.5);
	87	}
	88	wxCoord YDEV2LOG(wxCoord y) const
	89	{
	90	wxCoord new_y = y - m_deviceOriginY;
	91	if (new_y > 0)
	92	return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
	93	else
	94	return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
	95	}
	96	wxCoord YDEV2LOGREL(wxCoord y) const
	97	{
	98	if (y > 0)
	99	return (wxCoord)((double)(y) / m_scaleY + 0.5);
	100	else
	101	return (wxCoord)((double)(y) / m_scaleY - 0.5);
	102	}
	103	wxCoord XLOG2DEV(wxCoord x) const
	104	{
	105	wxCoord new_x = x - m_logicalOriginX;
	106	if (new_x > 0)
	107	return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
	108	else
	109	return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
	110	}
	111	wxCoord XLOG2DEVREL(wxCoord x) const
	112	{
	113	if (x > 0)
	114	return (wxCoord)((double)(x) * m_scaleX + 0.5);
	115	else
	116	return (wxCoord)((double)(x) * m_scaleX - 0.5);
	117	}
	118	wxCoord YLOG2DEV(wxCoord y) const
	119	{
	120	wxCoord new_y = y - m_logicalOriginY;
	121	if (new_y > 0)
	122	return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
	123	else
	124	return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
	125	}
	126	wxCoord YLOG2DEVREL(wxCoord y) const
	127	{
	128	if (y > 0)
	129	return (wxCoord)((double)(y) * m_scaleY + 0.5);
	130	else
	131	return (wxCoord)((double)(y) * m_scaleY - 0.5);
	132	}
	133
	134	protected:
	135	// base class pure virtuals implemented here
	136	virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
	137	virtual void DoGetSize(int width, int height) const;
	138	virtual void DoGetSizeMM(int* width, int* height) const;
	139
	140	public:
	141	// GTK-specific member variables
	142
	143	// not sure what for, but what is a mm on a screen you don't know the size
	144	// of?
	145	double m_mm_to_pix_x,
	146	m_mm_to_pix_y;
	147
	148	bool m_needComputeScaleX,
	149	m_needComputeScaleY; // not yet used
	150
	151	float m_scaleFactor; // wxPSDC wants to have this. Will disappear.
	152
	153	private:
	154	DECLARE_ABSTRACT_CLASS(wxDC)
	155	};
	156
	157	#endif // __GTKDCH__