/
dc.h
1524 lines (1234 loc) · 52.6 KB
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dc.h
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/////////////////////////////////////////////////////////////////////////////
// Name: wx/dc.h
// Purpose: wxDC class
// Author: Vadim Zeitlin
// Modified by:
// Created: 05/25/99
// RCS-ID: $Id$
// Copyright: (c) wxWidgets team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DC_H_BASE_
#define _WX_DC_H_BASE_
// ----------------------------------------------------------------------------
// headers which we must include here
// ----------------------------------------------------------------------------
#include "wx/object.h" // the base class
#include "wx/intl.h" // for wxLayoutDirection
#include "wx/cursor.h" // we have member variables of these classes
#include "wx/font.h" // so we can't do without them
#include "wx/colour.h"
#include "wx/bitmap.h" // for wxNullBitmap
#include "wx/brush.h"
#include "wx/pen.h"
#include "wx/palette.h"
#include "wx/dynarray.h"
#include "wx/math.h"
#include "wx/image.h"
#include "wx/region.h"
#include "wx/affinematrix2d.h"
#define wxUSE_NEW_DC 1
class WXDLLIMPEXP_FWD_CORE wxDC;
class WXDLLIMPEXP_FWD_CORE wxClientDC;
class WXDLLIMPEXP_FWD_CORE wxPaintDC;
class WXDLLIMPEXP_FWD_CORE wxWindowDC;
class WXDLLIMPEXP_FWD_CORE wxScreenDC;
class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
class WXDLLIMPEXP_FWD_CORE wxPrinterDC;
class WXDLLIMPEXP_FWD_CORE wxPrintData;
#if wxUSE_GRAPHICS_CONTEXT
class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
#endif
// Logical ops
enum wxRasterOperationMode
{
wxCLEAR, // 0
wxXOR, // src XOR dst
wxINVERT, // NOT dst
wxOR_REVERSE, // src OR (NOT dst)
wxAND_REVERSE, // src AND (NOT dst)
wxCOPY, // src
wxAND, // src AND dst
wxAND_INVERT, // (NOT src) AND dst
wxNO_OP, // dst
wxNOR, // (NOT src) AND (NOT dst)
wxEQUIV, // (NOT src) XOR dst
wxSRC_INVERT, // (NOT src)
wxOR_INVERT, // (NOT src) OR dst
wxNAND, // (NOT src) OR (NOT dst)
wxOR, // src OR dst
wxSET // 1
#if WXWIN_COMPATIBILITY_2_8
,wxROP_BLACK = wxCLEAR,
wxBLIT_BLACKNESS = wxCLEAR,
wxROP_XORPEN = wxXOR,
wxBLIT_SRCINVERT = wxXOR,
wxROP_NOT = wxINVERT,
wxBLIT_DSTINVERT = wxINVERT,
wxROP_MERGEPENNOT = wxOR_REVERSE,
wxBLIT_00DD0228 = wxOR_REVERSE,
wxROP_MASKPENNOT = wxAND_REVERSE,
wxBLIT_SRCERASE = wxAND_REVERSE,
wxROP_COPYPEN = wxCOPY,
wxBLIT_SRCCOPY = wxCOPY,
wxROP_MASKPEN = wxAND,
wxBLIT_SRCAND = wxAND,
wxROP_MASKNOTPEN = wxAND_INVERT,
wxBLIT_00220326 = wxAND_INVERT,
wxROP_NOP = wxNO_OP,
wxBLIT_00AA0029 = wxNO_OP,
wxROP_NOTMERGEPEN = wxNOR,
wxBLIT_NOTSRCERASE = wxNOR,
wxROP_NOTXORPEN = wxEQUIV,
wxBLIT_00990066 = wxEQUIV,
wxROP_NOTCOPYPEN = wxSRC_INVERT,
wxBLIT_NOTSCRCOPY = wxSRC_INVERT,
wxROP_MERGENOTPEN = wxOR_INVERT,
wxBLIT_MERGEPAINT = wxOR_INVERT,
wxROP_NOTMASKPEN = wxNAND,
wxBLIT_007700E6 = wxNAND,
wxROP_MERGEPEN = wxOR,
wxBLIT_SRCPAINT = wxOR,
wxROP_WHITE = wxSET,
wxBLIT_WHITENESS = wxSET
#endif //WXWIN_COMPATIBILITY_2_8
};
// Flood styles
enum wxFloodFillStyle
{
wxFLOOD_SURFACE = 1,
wxFLOOD_BORDER
};
// Mapping modes
enum wxMappingMode
{
wxMM_TEXT = 1,
wxMM_METRIC,
wxMM_LOMETRIC,
wxMM_TWIPS,
wxMM_POINTS
};
// Description of text characteristics.
struct wxFontMetrics
{
wxFontMetrics()
{
height =
ascent =
descent =
internalLeading =
externalLeading =
averageWidth = 0;
}
int height, // Total character height.
ascent, // Part of the height above the baseline.
descent, // Part of the height below the baseline.
internalLeading, // Intra-line spacing.
externalLeading, // Inter-line spacing.
averageWidth; // Average font width, a.k.a. "x-width".
};
#if WXWIN_COMPATIBILITY_2_8
//-----------------------------------------------------------------------------
// wxDrawObject helper class
//-----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDrawObject
{
public:
wxDEPRECATED_CONSTRUCTOR(wxDrawObject)()
: m_isBBoxValid(false)
, m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
{ }
virtual ~wxDrawObject() { }
virtual void Draw(wxDC&) const { }
virtual void CalcBoundingBox(wxCoord x, wxCoord y)
{
if ( m_isBBoxValid )
{
if ( x < m_minX ) m_minX = x;
if ( y < m_minY ) m_minY = y;
if ( x > m_maxX ) m_maxX = x;
if ( y > m_maxY ) m_maxY = y;
}
else
{
m_isBBoxValid = true;
m_minX = x;
m_minY = y;
m_maxX = x;
m_maxY = y;
}
}
void ResetBoundingBox()
{
m_isBBoxValid = false;
m_minX = m_maxX = m_minY = m_maxY = 0;
}
// Get the final bounding box of the PostScript or Metafile picture.
wxCoord MinX() const { return m_minX; }
wxCoord MaxX() const { return m_maxX; }
wxCoord MinY() const { return m_minY; }
wxCoord MaxY() const { return m_maxY; }
//to define the type of object for derived objects
virtual int GetType()=0;
protected:
//for boundingbox calculation
bool m_isBBoxValid:1;
//for boundingbox calculation
wxCoord m_minX, m_minY, m_maxX, m_maxY;
};
#endif // WXWIN_COMPATIBILITY_2_8
//-----------------------------------------------------------------------------
// wxDCFactory
//-----------------------------------------------------------------------------
class WXDLLIMPEXP_FWD_CORE wxDCImpl;
class WXDLLIMPEXP_CORE wxDCFactory
{
public:
wxDCFactory() {}
virtual ~wxDCFactory() {}
virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner, wxWindow *window ) = 0;
virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window ) = 0;
virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window ) = 0;
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner ) = 0;
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap ) = 0;
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc ) = 0;
virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner ) = 0;
#if wxUSE_PRINTING_ARCHITECTURE
virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data ) = 0;
#endif
static void Set(wxDCFactory *factory);
static wxDCFactory *Get();
private:
static wxDCFactory *m_factory;
};
//-----------------------------------------------------------------------------
// wxNativeDCFactory
//-----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxNativeDCFactory: public wxDCFactory
{
public:
wxNativeDCFactory() {}
virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner, wxWindow *window );
virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window );
virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window );
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner );
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap );
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc );
virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner );
#if wxUSE_PRINTING_ARCHITECTURE
virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data );
#endif
};
//-----------------------------------------------------------------------------
// wxDCImpl
//-----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCImpl: public wxObject
{
public:
wxDCImpl( wxDC *owner );
virtual ~wxDCImpl();
wxDC *GetOwner() const { return m_owner; }
wxWindow* GetWindow() const { return m_window; }
virtual bool IsOk() const { return m_ok; }
// query capabilities
virtual bool CanDrawBitmap() const = 0;
virtual bool CanGetTextExtent() const = 0;
// get Cairo context
virtual void* GetCairoContext() const
{
return NULL;
}
virtual void* GetHandle() const { return NULL; }
// query dimension, colour deps, resolution
virtual void DoGetSize(int *width, int *height) const = 0;
void GetSize(int *width, int *height) const
{
DoGetSize(width, height);
return ;
}
wxSize GetSize() const
{
int w, h;
DoGetSize(&w, &h);
return wxSize(w, h);
}
virtual void DoGetSizeMM(int* width, int* height) const = 0;
virtual int GetDepth() const = 0;
virtual wxSize GetPPI() const = 0;
// Right-To-Left (RTL) modes
virtual void SetLayoutDirection(wxLayoutDirection WXUNUSED(dir)) { }
virtual wxLayoutDirection GetLayoutDirection() const { return wxLayout_Default; }
// page and document
virtual bool StartDoc(const wxString& WXUNUSED(message)) { return true; }
virtual void EndDoc() { }
virtual void StartPage() { }
virtual void EndPage() { }
// flushing the content of this dc immediately eg onto screen
virtual void Flush() { }
// bounding box
virtual void CalcBoundingBox(wxCoord x, wxCoord y)
{
if ( m_isBBoxValid )
{
if ( x < m_minX ) m_minX = x;
if ( y < m_minY ) m_minY = y;
if ( x > m_maxX ) m_maxX = x;
if ( y > m_maxY ) m_maxY = y;
}
else
{
m_isBBoxValid = true;
m_minX = x;
m_minY = y;
m_maxX = x;
m_maxY = y;
}
}
void ResetBoundingBox()
{
m_isBBoxValid = false;
m_minX = m_maxX = m_minY = m_maxY = 0;
}
wxCoord MinX() const { return m_minX; }
wxCoord MaxX() const { return m_maxX; }
wxCoord MinY() const { return m_minY; }
wxCoord MaxY() const { return m_maxY; }
// setters and getters
virtual void SetFont(const wxFont& font) = 0;
virtual const wxFont& GetFont() const { return m_font; }
virtual void SetPen(const wxPen& pen) = 0;
virtual const wxPen& GetPen() const { return m_pen; }
virtual void SetBrush(const wxBrush& brush) = 0;
virtual const wxBrush& GetBrush() const { return m_brush; }
virtual void SetBackground(const wxBrush& brush) = 0;
virtual const wxBrush& GetBackground() const { return m_backgroundBrush; }
virtual void SetBackgroundMode(int mode) = 0;
virtual int GetBackgroundMode() const { return m_backgroundMode; }
virtual void SetTextForeground(const wxColour& colour)
{ m_textForegroundColour = colour; }
virtual const wxColour& GetTextForeground() const
{ return m_textForegroundColour; }
virtual void SetTextBackground(const wxColour& colour)
{ m_textBackgroundColour = colour; }
virtual const wxColour& GetTextBackground() const
{ return m_textBackgroundColour; }
#if wxUSE_PALETTE
virtual void SetPalette(const wxPalette& palette) = 0;
#endif // wxUSE_PALETTE
// inherit the DC attributes (font and colours) from the given window
//
// this is called automatically when a window, client or paint DC is
// created
virtual void InheritAttributes(wxWindow *win);
// logical functions
virtual void SetLogicalFunction(wxRasterOperationMode function) = 0;
virtual wxRasterOperationMode GetLogicalFunction() const
{ return m_logicalFunction; }
// text measurement
virtual wxCoord GetCharHeight() const = 0;
virtual wxCoord GetCharWidth() const = 0;
// The derived classes should really override DoGetFontMetrics() to return
// the correct values in the future but for now provide a default
// implementation in terms of DoGetTextExtent() to avoid breaking the
// compilation of all other ports as wxMSW is the only one to implement it.
virtual void DoGetFontMetrics(int *height,
int *ascent,
int *descent,
int *internalLeading,
int *externalLeading,
int *averageWidth) const;
virtual void DoGetTextExtent(const wxString& string,
wxCoord *x, wxCoord *y,
wxCoord *descent = NULL,
wxCoord *externalLeading = NULL,
const wxFont *theFont = NULL) const = 0;
virtual void GetMultiLineTextExtent(const wxString& string,
wxCoord *width,
wxCoord *height,
wxCoord *heightLine = NULL,
const wxFont *font = NULL) const;
virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
// clearing
virtual void Clear() = 0;
// clipping
virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
wxCoord width, wxCoord height) = 0;
// NB: this function works with device coordinates, not the logical ones!
virtual void DoSetDeviceClippingRegion(const wxRegion& region) = 0;
virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
wxCoord *w, wxCoord *h) const
{
if ( x )
*x = m_clipX1;
if ( y )
*y = m_clipY1;
if ( w )
*w = m_clipX2 - m_clipX1;
if ( h )
*h = m_clipY2 - m_clipY1;
}
virtual void DestroyClippingRegion() { ResetClipping(); }
// coordinates conversions and transforms
virtual wxCoord DeviceToLogicalX(wxCoord x) const;
virtual wxCoord DeviceToLogicalY(wxCoord y) const;
virtual wxCoord DeviceToLogicalXRel(wxCoord x) const;
virtual wxCoord DeviceToLogicalYRel(wxCoord y) const;
virtual wxCoord LogicalToDeviceX(wxCoord x) const;
virtual wxCoord LogicalToDeviceY(wxCoord y) const;
virtual wxCoord LogicalToDeviceXRel(wxCoord x) const;
virtual wxCoord LogicalToDeviceYRel(wxCoord y) const;
virtual void SetMapMode(wxMappingMode mode);
virtual wxMappingMode GetMapMode() const { return m_mappingMode; }
virtual void SetUserScale(double x, double y);
virtual void GetUserScale(double *x, double *y) const
{
if ( x ) *x = m_userScaleX;
if ( y ) *y = m_userScaleY;
}
virtual void SetLogicalScale(double x, double y);
virtual void GetLogicalScale(double *x, double *y) const
{
if ( x ) *x = m_logicalScaleX;
if ( y ) *y = m_logicalScaleY;
}
virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const
{
if ( x ) *x = m_logicalOriginX;
if ( y ) *y = m_logicalOriginY;
}
virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
virtual void DoGetDeviceOrigin(wxCoord *x, wxCoord *y) const
{
if ( x ) *x = m_deviceOriginX;
if ( y ) *y = m_deviceOriginY;
}
#if wxUSE_DC_TRANSFORM_MATRIX
// Transform matrix support is not available in most ports right now
// (currently only wxMSW provides it) so do nothing in these methods by
// default.
virtual bool CanUseTransformMatrix() const
{ return false; }
virtual bool SetTransformMatrix(const wxAffineMatrix2D& WXUNUSED(matrix))
{ return false; }
virtual wxAffineMatrix2D GetTransformMatrix() const
{ return wxAffineMatrix2D(); }
virtual void ResetTransformMatrix()
{ }
#endif // wxUSE_DC_TRANSFORM_MATRIX
virtual void SetDeviceLocalOrigin( wxCoord x, wxCoord y );
virtual void ComputeScaleAndOrigin();
// this needs to overidden if the axis is inverted
virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
#ifdef __WXMSW__
// Native Windows functions using the underlying HDC don't honour GDI+
// transformations which may be applied to it. Using this function we can
// transform the coordinates manually before passing them to such functions
// (as in e.g. wxRendererMSW code). It doesn't do anything if this is not a
// wxGCDC.
virtual wxRect MSWApplyGDIPlusTransform(const wxRect& r) const
{
return r;
}
#endif // __WXMSW__
// ---------------------------------------------------------
// the actual drawing API
virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
wxFloodFillStyle style = wxFLOOD_SURFACE) = 0;
virtual void DoGradientFillLinear(const wxRect& rect,
const wxColour& initialColour,
const wxColour& destColour,
wxDirection nDirection = wxEAST);
virtual void DoGradientFillConcentric(const wxRect& rect,
const wxColour& initialColour,
const wxColour& destColour,
const wxPoint& circleCenter);
virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const = 0;
virtual void DoDrawPoint(wxCoord x, wxCoord y) = 0;
virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) = 0;
virtual void DoDrawArc(wxCoord x1, wxCoord y1,
wxCoord x2, wxCoord y2,
wxCoord xc, wxCoord yc) = 0;
virtual void DoDrawCheckMark(wxCoord x, wxCoord y,
wxCoord width, wxCoord height);
virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
double sa, double ea) = 0;
virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0;
virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
wxCoord width, wxCoord height,
double radius) = 0;
virtual void DoDrawEllipse(wxCoord x, wxCoord y,
wxCoord width, wxCoord height) = 0;
virtual void DoCrossHair(wxCoord x, wxCoord y) = 0;
virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) = 0;
virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
bool useMask = false) = 0;
virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) = 0;
virtual void DoDrawRotatedText(const wxString& text,
wxCoord x, wxCoord y, double angle) = 0;
virtual bool DoBlit(wxCoord xdest, wxCoord ydest,
wxCoord width, wxCoord height,
wxDC *source,
wxCoord xsrc, wxCoord ysrc,
wxRasterOperationMode rop = wxCOPY,
bool useMask = false,
wxCoord xsrcMask = wxDefaultCoord,
wxCoord ysrcMask = wxDefaultCoord) = 0;
virtual bool DoStretchBlit(wxCoord xdest, wxCoord ydest,
wxCoord dstWidth, wxCoord dstHeight,
wxDC *source,
wxCoord xsrc, wxCoord ysrc,
wxCoord srcWidth, wxCoord srcHeight,
wxRasterOperationMode rop = wxCOPY,
bool useMask = false,
wxCoord xsrcMask = wxDefaultCoord,
wxCoord ysrcMask = wxDefaultCoord);
virtual wxBitmap DoGetAsBitmap(const wxRect *WXUNUSED(subrect)) const
{ return wxNullBitmap; }
virtual void DoDrawLines(int n, wxPoint points[],
wxCoord xoffset, wxCoord yoffset ) = 0;
virtual void DrawLines(const wxPointList *list,
wxCoord xoffset, wxCoord yoffset );
virtual void DoDrawPolygon(int n, wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0;
virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
wxPolygonFillMode fillStyle);
void DrawPolygon(const wxPointList *list,
wxCoord xoffset, wxCoord yoffset,
wxPolygonFillMode fillStyle );
#if wxUSE_SPLINES
void DrawSpline(wxCoord x1, wxCoord y1,
wxCoord x2, wxCoord y2,
wxCoord x3, wxCoord y3);
void DrawSpline(int n, wxPoint points[]);
void DrawSpline(const wxPointList *points) { DoDrawSpline(points); }
virtual void DoDrawSpline(const wxPointList *points);
#endif
// ---------------------------------------------------------
// wxMemoryDC Impl API
virtual void DoSelect(const wxBitmap& WXUNUSED(bmp))
{ }
virtual const wxBitmap& GetSelectedBitmap() const
{ return wxNullBitmap; }
virtual wxBitmap& GetSelectedBitmap()
{ return wxNullBitmap; }
// ---------------------------------------------------------
// wxPrinterDC Impl API
virtual wxRect GetPaperRect() const
{ int w = 0; int h = 0; DoGetSize( &w, &h ); return wxRect(0,0,w,h); }
virtual int GetResolution() const
{ return -1; }
#if wxUSE_GRAPHICS_CONTEXT
virtual wxGraphicsContext* GetGraphicsContext() const
{ return NULL; }
virtual void SetGraphicsContext( wxGraphicsContext* WXUNUSED(ctx) )
{}
#endif
private:
wxDC *m_owner;
protected:
// unset clipping variables (after clipping region was destroyed)
void ResetClipping()
{
m_clipping = false;
m_clipX1 = m_clipX2 = m_clipY1 = m_clipY2 = 0;
}
#ifdef __WXWINCE__
//! Generic method to draw ellipses, circles and arcs with current pen and brush.
/*! \param x Upper left corner of bounding box.
* \param y Upper left corner of bounding box.
* \param w Width of bounding box.
* \param h Height of bounding box.
* \param sa Starting angle of arc
* (counterclockwise, start at 3 o'clock, 360 is full circle).
* \param ea Ending angle of arc.
* \param angle Rotation angle, the Arc will be rotated after
* calculating begin and end.
*/
void DrawEllipticArcRot( wxCoord x, wxCoord y,
wxCoord width, wxCoord height,
double sa = 0, double ea = 0, double angle = 0 )
{ DoDrawEllipticArcRot( x, y, width, height, sa, ea, angle ); }
void DrawEllipticArcRot( const wxPoint& pt,
const wxSize& sz,
double sa = 0, double ea = 0, double angle = 0 )
{ DoDrawEllipticArcRot( pt.x, pt.y, sz.x, sz.y, sa, ea, angle ); }
void DrawEllipticArcRot( const wxRect& rect,
double sa = 0, double ea = 0, double angle = 0 )
{ DoDrawEllipticArcRot( rect.x, rect.y, rect.width, rect.height, sa, ea, angle ); }
virtual void DoDrawEllipticArcRot( wxCoord x, wxCoord y,
wxCoord w, wxCoord h,
double sa = 0, double ea = 0, double angle = 0 );
//! Rotates points around center.
/*! This is a quite straight method, it calculates in pixels
* and so it produces rounding errors.
* \param points The points inside will be rotated.
* \param angle Rotating angle (counterclockwise, start at 3 o'clock, 360 is full circle).
* \param center Center of rotation.
*/
void Rotate( wxPointList* points, double angle, wxPoint center = wxPoint(0,0) );
// used by DrawEllipticArcRot
// Careful: wxList gets filled with points you have to delete later.
void CalculateEllipticPoints( wxPointList* points,
wxCoord xStart, wxCoord yStart,
wxCoord w, wxCoord h,
double sa, double ea );
#endif // __WXWINCE__
// returns adjustment factor for converting wxFont "point size"; in wx
// it is point size on screen and needs to be multiplied by this value
// for rendering on higher-resolution DCs such as printer ones
static float GetFontPointSizeAdjustment(float dpi);
// window on which the DC draws or NULL
wxWindow *m_window;
// flags
bool m_colour:1;
bool m_ok:1;
bool m_clipping:1;
bool m_isInteractive:1;
bool m_isBBoxValid:1;
// coordinate system variables
wxCoord m_logicalOriginX, m_logicalOriginY;
wxCoord m_deviceOriginX, m_deviceOriginY; // Usually 0,0, can be change by user
wxCoord m_deviceLocalOriginX, m_deviceLocalOriginY; // non-zero if native top-left corner
// is not at 0,0. This was the case under
// Mac's GrafPorts (coordinate system
// used toplevel window's origin) and
// e.g. for Postscript, where the native
// origin in the bottom left corner.
double m_logicalScaleX, m_logicalScaleY;
double m_userScaleX, m_userScaleY;
double m_scaleX, m_scaleY; // calculated from logical scale and user scale
int m_signX, m_signY; // Used by SetAxisOrientation() to invert the axes
// what is a mm on a screen you don't know the size of?
double m_mm_to_pix_x,
m_mm_to_pix_y;
// bounding and clipping boxes
wxCoord m_minX, m_minY, m_maxX, m_maxY;
wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2;
wxRasterOperationMode m_logicalFunction;
int m_backgroundMode;
wxMappingMode m_mappingMode;
wxPen m_pen;
wxBrush m_brush;
wxBrush m_backgroundBrush;
wxColour m_textForegroundColour;
wxColour m_textBackgroundColour;
wxFont m_font;
#if wxUSE_PALETTE
wxPalette m_palette;
bool m_hasCustomPalette;
#endif // wxUSE_PALETTE
private:
DECLARE_ABSTRACT_CLASS(wxDCImpl)
};
class WXDLLIMPEXP_CORE wxDC : public wxObject
{
public:
// copy attributes (font, colours and writing direction) from another DC
void CopyAttributes(const wxDC& dc);
virtual ~wxDC() { delete m_pimpl; }
wxDCImpl *GetImpl()
{ return m_pimpl; }
const wxDCImpl *GetImpl() const
{ return m_pimpl; }
wxWindow *GetWindow() const
{ return m_pimpl->GetWindow(); }
void *GetHandle() const
{ return m_pimpl->GetHandle(); }
bool IsOk() const
{ return m_pimpl && m_pimpl->IsOk(); }
// query capabilities
bool CanDrawBitmap() const
{ return m_pimpl->CanDrawBitmap(); }
bool CanGetTextExtent() const
{ return m_pimpl->CanGetTextExtent(); }
// query dimension, colour deps, resolution
void GetSize(int *width, int *height) const
{ m_pimpl->DoGetSize(width, height); }
wxSize GetSize() const
{ return m_pimpl->GetSize(); }
void GetSizeMM(int* width, int* height) const
{ m_pimpl->DoGetSizeMM(width, height); }
wxSize GetSizeMM() const
{
int w, h;
m_pimpl->DoGetSizeMM(&w, &h);
return wxSize(w, h);
}
int GetDepth() const
{ return m_pimpl->GetDepth(); }
wxSize GetPPI() const
{ return m_pimpl->GetPPI(); }
virtual int GetResolution() const
{ return m_pimpl->GetResolution(); }
// Right-To-Left (RTL) modes
void SetLayoutDirection(wxLayoutDirection dir)
{ m_pimpl->SetLayoutDirection( dir ); }
wxLayoutDirection GetLayoutDirection() const
{ return m_pimpl->GetLayoutDirection(); }
// page and document
bool StartDoc(const wxString& message)
{ return m_pimpl->StartDoc(message); }
void EndDoc()
{ m_pimpl->EndDoc(); }
void StartPage()
{ m_pimpl->StartPage(); }
void EndPage()
{ m_pimpl->EndPage(); }
// bounding box
void CalcBoundingBox(wxCoord x, wxCoord y)
{ m_pimpl->CalcBoundingBox(x,y); }
void ResetBoundingBox()
{ m_pimpl->ResetBoundingBox(); }
wxCoord MinX() const
{ return m_pimpl->MinX(); }
wxCoord MaxX() const
{ return m_pimpl->MaxX(); }
wxCoord MinY() const
{ return m_pimpl->MinY(); }
wxCoord MaxY() const
{ return m_pimpl->MaxY(); }
// setters and getters
void SetFont(const wxFont& font)
{ m_pimpl->SetFont( font ); }
const wxFont& GetFont() const
{ return m_pimpl->GetFont(); }
void SetPen(const wxPen& pen)
{ m_pimpl->SetPen( pen ); }
const wxPen& GetPen() const
{ return m_pimpl->GetPen(); }
void SetBrush(const wxBrush& brush)
{ m_pimpl->SetBrush( brush ); }
const wxBrush& GetBrush() const
{ return m_pimpl->GetBrush(); }
void SetBackground(const wxBrush& brush)
{ m_pimpl->SetBackground( brush ); }
const wxBrush& GetBackground() const
{ return m_pimpl->GetBackground(); }
void SetBackgroundMode(int mode)
{ m_pimpl->SetBackgroundMode( mode ); }
int GetBackgroundMode() const
{ return m_pimpl->GetBackgroundMode(); }
void SetTextForeground(const wxColour& colour)
{ m_pimpl->SetTextForeground(colour); }
const wxColour& GetTextForeground() const
{ return m_pimpl->GetTextForeground(); }
void SetTextBackground(const wxColour& colour)
{ m_pimpl->SetTextBackground(colour); }
const wxColour& GetTextBackground() const
{ return m_pimpl->GetTextBackground(); }
#if wxUSE_PALETTE
void SetPalette(const wxPalette& palette)
{ m_pimpl->SetPalette(palette); }
#endif // wxUSE_PALETTE
// logical functions
void SetLogicalFunction(wxRasterOperationMode function)
{ m_pimpl->SetLogicalFunction(function); }
wxRasterOperationMode GetLogicalFunction() const
{ return m_pimpl->GetLogicalFunction(); }
// text measurement
wxCoord GetCharHeight() const
{ return m_pimpl->GetCharHeight(); }
wxCoord GetCharWidth() const
{ return m_pimpl->GetCharWidth(); }
wxFontMetrics GetFontMetrics() const
{
wxFontMetrics fm;
m_pimpl->DoGetFontMetrics(&fm.height, &fm.ascent, &fm.descent,
&fm.internalLeading, &fm.externalLeading,
&fm.averageWidth);
return fm;
}
void GetTextExtent(const wxString& string,
wxCoord *x, wxCoord *y,
wxCoord *descent = NULL,
wxCoord *externalLeading = NULL,
const wxFont *theFont = NULL) const
{ m_pimpl->DoGetTextExtent(string, x, y, descent, externalLeading, theFont); }
wxSize GetTextExtent(const wxString& string) const
{
wxCoord w, h;
m_pimpl->DoGetTextExtent(string, &w, &h);
return wxSize(w, h);
}
void GetMultiLineTextExtent(const wxString& string,
wxCoord *width,
wxCoord *height,
wxCoord *heightLine = NULL,
const wxFont *font = NULL) const
{ m_pimpl->GetMultiLineTextExtent( string, width, height, heightLine, font ); }
wxSize GetMultiLineTextExtent(const wxString& string) const
{
wxCoord w, h;
m_pimpl->GetMultiLineTextExtent(string, &w, &h);
return wxSize(w, h);
}
bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
{ return m_pimpl->DoGetPartialTextExtents(text, widths); }
// clearing
void Clear()
{ m_pimpl->Clear(); }
// clipping
void SetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{ m_pimpl->DoSetClippingRegion(x, y, width, height); }
void SetClippingRegion(const wxPoint& pt, const wxSize& sz)
{ m_pimpl->DoSetClippingRegion(pt.x, pt.y, sz.x, sz.y); }
void SetClippingRegion(const wxRect& rect)
{ m_pimpl->DoSetClippingRegion(rect.x, rect.y, rect.width, rect.height); }
// unlike the functions above, the coordinates of the region used in this
// one are in device coordinates, not the logical ones
void SetDeviceClippingRegion(const wxRegion& region)
{ m_pimpl->DoSetDeviceClippingRegion(region); }
// this function is deprecated because its name is confusing: you may
// expect it to work with logical coordinates but, in fact, it does exactly
// the same thing as SetDeviceClippingRegion()
//
// please review the code using it and either replace it with calls to
// SetDeviceClippingRegion() or correct it if it was [wrongly] passing
// logical coordinates to this function
wxDEPRECATED_INLINE(void SetClippingRegion(const wxRegion& region),
SetDeviceClippingRegion(region); )
void DestroyClippingRegion()
{ m_pimpl->DestroyClippingRegion(); }
void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
{ m_pimpl->DoGetClippingBox(x, y, w, h); }
void GetClippingBox(wxRect& rect) const
{ m_pimpl->DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height); }
// coordinates conversions and transforms
wxCoord DeviceToLogicalX(wxCoord x) const
{ return m_pimpl->DeviceToLogicalX(x); }