wxWidgets/include/wx/msw/dc.h

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/////////////////////////////////////////////////////////////////////////////
// Name: dc.h
// Purpose: wxDC class
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DC_H_
#define _WX_DC_H_
#ifdef __GNUG__
#pragma interface "dc.h"
#endif
// ---------------------------------------------------------------------------
// macros
// ---------------------------------------------------------------------------
// Logical to device
// Absolute
#define XLOG2DEV(x) (x)
#define YLOG2DEV(y) (y)
// Relative
#define XLOG2DEVREL(x) (x)
#define YLOG2DEVREL(y) (y)
// Device to logical
// Absolute
#define XDEV2LOG(x) (x)
#define YDEV2LOG(y) (y)
// Relative
#define XDEV2LOGREL(x) (x)
#define YDEV2LOGREL(y) (y)
/*
* Have the same macros as for XView but not for every operation:
* just for calculating window/viewport extent (a better way of scaling).
*/
// Logical to device
// Absolute
#define MS_XLOG2DEV(x) LogicalToDevice(x)
#define MS_YLOG2DEV(y) LogicalToDevice(y)
// Relative
#define MS_XLOG2DEVREL(x) LogicalToDeviceXRel(x)
#define MS_YLOG2DEVREL(y) LogicalToDeviceYRel(y)
// Device to logical
// Absolute
#define MS_XDEV2LOG(x) DeviceToLogicalX(x)
#define MS_YDEV2LOG(y) DeviceToLogicalY(y)
// Relative
#define MS_XDEV2LOGREL(x) DeviceToLogicalXRel(x)
#define MS_YDEV2LOGREL(y) DeviceToLogicalYRel(y)
#define YSCALE(y) (yorigin - (y))
#define wx_round(a) (int)((a)+.5)
class WXDLLEXPORT wxDC : public wxDCBase
{
DECLARE_DYNAMIC_CLASS(wxDC)
public:
wxDC();
~wxDC();
// implement base class pure virtuals
// ----------------------------------
virtual void Clear();
virtual bool StartDoc(const wxString& message);
virtual void EndDoc();
virtual void StartPage();
virtual void EndPage();
virtual void SetFont(const wxFont& font);
virtual void SetPen(const wxPen& pen);
virtual void SetBrush(const wxBrush& brush);
virtual void SetBackground(const wxBrush& brush);
virtual void SetBackgroundMode(int mode);
virtual void SetPalette(const wxPalette& palette);
virtual void DestroyClippingRegion();
virtual long GetCharHeight() const;
virtual long GetCharWidth() const;
virtual void GetTextExtent(const wxString& string,
long *x, long *y,
long *descent = NULL,
long *externalLeading = NULL,
wxFont *theFont = NULL) const;
virtual bool CanDrawBitmap() const;
virtual bool CanGetTextExtent() const;
virtual int GetDepth() const;
virtual wxSize GetPPI() const;
virtual void SetMapMode(int mode);
virtual void SetUserScale(double x, double y);
virtual void SetSystemScale(double x, double y);
virtual void SetLogicalScale(double x, double y);
virtual void SetLogicalOrigin(long x, long y);
virtual void SetDeviceOrigin(long x, long y);
virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
virtual void SetLogicalFunction(int function);
// implementation from now on
// --------------------------
virtual void SetRop(WXHDC cdc);
virtual void DoClipping(WXHDC cdc);
virtual void SelectOldObjects(WXHDC dc);
wxWindow *GetWindow() const { return m_canvas; }
void SetWindow(wxWindow *win) { m_canvas = win; }
WXHDC GetHDC() const { return m_hDC; }
void SetHDC(WXHDC dc, bool bOwnsDC = FALSE)
{
m_hDC = dc;
m_bOwnsDC = bOwnsDC;
}
protected:
virtual void DoFloodFill(long x, long y, const wxColour& col,
int style = wxFLOOD_SURFACE);
virtual bool DoGetPixel(long x, long y, wxColour *col) const;
virtual void DoDrawPoint(long x, long y);
virtual void DoDrawLine(long x1, long y1, long x2, long y2);
virtual void DoDrawArc(long x1, long y1,
long x2, long y2,
long xc, long yc);
virtual void DoDrawEllipticArc(long x, long y, long w, long h,
double sa, double ea);
virtual void DoDrawRectangle(long x, long y, long width, long height);
virtual void DoDrawRoundedRectangle(long x, long y,
long width, long height,
double radius);
virtual void DoDrawEllipse(long x, long y, long width, long height);
virtual void DoCrossHair(long x, long y);
virtual void DoDrawIcon(const wxIcon& icon, long x, long y);
virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
bool useMask = FALSE);
virtual void DoDrawText(const wxString& text, long x, long y);
virtual bool DoBlit(long xdest, long ydest, long width, long height,
wxDC *source, long xsrc, long ysrc,
int rop = wxCOPY, bool useMask = FALSE);
// this is gnarly - we can't even call this function DoSetClippingRegion()
// because of virtual function hiding
virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
virtual void DoSetClippingRegion(long x, long y,
long width, long height);
virtual void DoGetClippingRegion(long *x, long *y,
long *width, long *height)
{
GetClippingBox(x, y, width, height);
}
virtual void DoGetSize(int *width, int *height) const;
virtual void DoGetSizeMM(int* width, int* height) const;
virtual void DoDrawLines(int n, wxPoint points[],
long xoffset, long yoffset);
virtual void DoDrawPolygon(int n, wxPoint points[],
long xoffset, long yoffset,
int fillStyle = wxODDEVEN_RULE);
#if wxUSE_SPLINES
virtual void DoDrawSpline(wxList *points);
#endif // wxUSE_SPLINES
// MSW-specific member variables
int m_windowExtX;
int m_windowExtY;
// the window associated with this DC (may be NULL)
wxWindow *m_canvas;
wxBitmap m_selectedBitmap;
// TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
bool m_bOwnsDC:1;
// our HDC and its usage count: we only free it when the usage count drops
// to 0
WXHDC m_hDC;
int m_hDCCount;
// Store all old GDI objects when do a SelectObject, so we can select them
// back in (this unselecting user's objects) so we can safely delete the
// DC.
WXHBITMAP m_oldBitmap;
WXHPEN m_oldPen;
WXHBRUSH m_oldBrush;
WXHFONT m_oldFont;
WXHPALETTE m_oldPalette;
};
#endif
// _WX_DC_H_