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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: 17/09/98
	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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	16	#pragma interface "dc.h"
	17	#endif
	18
	19	#include "wx/pen.h"
	20	#include "wx/brush.h"
	21	#include "wx/icon.h"
	22	#include "wx/font.h"
	23	#include "wx/gdicmn.h"
	24
	25	//-----------------------------------------------------------------------------
	26	// constants
	27	//-----------------------------------------------------------------------------
	28
	29	#ifndef MM_TEXT
	30	#define MM_TEXT 0
	31	#define MM_ISOTROPIC 1
	32	#define MM_ANISOTROPIC 2
	33	#define MM_LOMETRIC 3
	34	#define MM_HIMETRIC 4
	35	#define MM_TWIPS 5
	36	#define MM_POINTS 6
	37	#define MM_METRIC 7
	38	#endif
	39
	40	//-----------------------------------------------------------------------------
	41	// wxDC
	42	//-----------------------------------------------------------------------------
	43
	44	class WXDLLEXPORT wxDC : public wxDCBase
	45	{
	46	public:
	47	wxDC();
	48	~wxDC() { }
	49
	50	// implement base class pure virtuals
	51	// ----------------------------------
	52
	53	virtual wxSize GetPPI() const;
	54
	55	virtual void SetMapMode(int mode);
	56	virtual void SetUserScale(double x, double y);
	57	virtual void SetLogicalScale(double x, double y);
	58	virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
	59	virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
	60	virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
	61
	62	protected:
	63	virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
	64	wxCoord width, wxCoord height);
	65	virtual void DoGetSizeMM(int* width, int* height) const;
	66
	67	public:
	68	void ComputeScaleAndOrigin();
	69
	70	wxCoord XDEV2LOG(wxCoord x) const
	71	{
	72	wxCoord new_x = x - m_deviceOriginX;
	73	if (new_x > 0)
	74	return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
	75	else
	76	return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
	77	}
	78	wxCoord XDEV2LOGREL(wxCoord x) const
	79	{
	80	if (x > 0)
	81	return (wxCoord)((double)(x) / m_scaleX + 0.5);
	82	else
	83	return (wxCoord)((double)(x) / m_scaleX - 0.5);
	84	}
	85	wxCoord YDEV2LOG(wxCoord y) const
	86	{
	87	wxCoord new_y = y - m_deviceOriginY;
	88	if (new_y > 0)
	89	return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
	90	else
	91	return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
	92	}
	93	wxCoord YDEV2LOGREL(wxCoord y) const
	94	{
	95	if (y > 0)
	96	return (wxCoord)((double)(y) / m_scaleY + 0.5);
	97	else
	98	return (wxCoord)((double)(y) / m_scaleY - 0.5);
	99	}
	100	wxCoord XLOG2DEV(wxCoord x) const
	101	{
	102	wxCoord new_x = x - m_logicalOriginX;
	103	if (new_x > 0)
	104	return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
	105	else
	106	return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
	107	}
	108	wxCoord XLOG2DEVREL(wxCoord x) const
	109	{
	110	if (x > 0)
	111	return (wxCoord)((double)(x) * m_scaleX + 0.5);
	112	else
	113	return (wxCoord)((double)(x) * m_scaleX - 0.5);
	114	}
	115	wxCoord YLOG2DEV(wxCoord y) const
	116	{
	117	wxCoord new_y = y - m_logicalOriginY;
	118	if (new_y > 0)
	119	return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
	120	else
	121	return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
	122	}
	123	wxCoord YLOG2DEVREL(wxCoord y) const
	124	{
	125	if (y > 0)
	126	return (wxCoord)((double)(y) * m_scaleY + 0.5);
	127	else
	128	return (wxCoord)((double)(y) * m_scaleY - 0.5);
	129	}
	130
	131	public:
	132	// not sure what for, but what is a mm on a screen you don't know the size of?
	133	double m_mm_to_pix_x,m_mm_to_pix_y;
	134
	135	// recompute scale?
	136	bool m_needComputeScaleX, m_needComputeScaleY;
	137
	138
	139	private:
	140	DECLARE_ABSTRACT_CLASS(wxDC)
	141	};
	142
	143	#endif
	144	// _WX_DC_H_