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wxWidgets/include/wx/dc.h
Vsevolod V Gromov 3674bd1c1f Add wxDCTextBgColourChanger and wxDCTextBgModeChanger helpers 
These classes are similar to the existing wxDCTextColourChanger and
allow temporarily changing other wxDC attributes.

Closes https://github.com/wxWidgets/wxWidgets/pull/1298
2019-04-18 16:34:38 +02:00

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/////////////////////////////////////////////////////////////////////////////
// Name: wx/dc.h
// Purpose: wxDC class
// Author: Vadim Zeitlin
// Modified by:
// Created: 05/25/99
// 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/colour.h" // we have member variables of these classes
#include "wx/font.h" // so we can't do without them
#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;
class WXDLLIMPEXP_FWD_CORE wxWindow;
#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 ) wxOVERRIDE;
virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window ) wxOVERRIDE;
virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window ) wxOVERRIDE;
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner ) wxOVERRIDE;
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap ) wxOVERRIDE;
virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc ) wxOVERRIDE;
virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner ) wxOVERRIDE;
#if wxUSE_PRINTING_ARCHITECTURE
virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data ) wxOVERRIDE;
#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)
{
// Bounding box is internally stored in device units.
x = LogicalToDeviceX(x);
y = LogicalToDeviceY(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 bounding box in logical units.
wxCoord MinX() const { return m_isBBoxValid ? DeviceToLogicalX(m_minX) : 0; }
wxCoord MaxX() const { return m_isBBoxValid ? DeviceToLogicalX(m_maxX) : 0; }
wxCoord MinY() const { return m_isBBoxValid ? DeviceToLogicalY(m_minY) : 0; }
wxCoord MaxY() const { return m_isBBoxValid ? DeviceToLogicalY(m_maxY) : 0; }
// 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
// Note that this pure virtual method has an implementation that updates
// the values returned by DoGetClippingBox() and so can be called from the
// derived class overridden version if it makes sense (i.e. if the clipping
// box coordinates are not already updated in some other way).
virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
wxCoord w, wxCoord h) = 0;
// NB: this function works with device coordinates, not the logical ones!
virtual void DoSetDeviceClippingRegion(const wxRegion& region) = 0;
// Method used to implement wxDC::GetClippingBox().
//
// Default implementation returns values stored in m_clip[XY][12] member
// variables, so this method doesn't need to be overridden if they're kept
// up to date.
virtual bool DoGetClippingRect(wxRect& rect) const;
#if WXWIN_COMPATIBILITY_3_0
// This method is kept for backwards compatibility but shouldn't be used
// nor overridden in the new code, implement DoGetClippingRect() above
// instead.
wxDEPRECATED_BUT_USED_INTERNALLY(
virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
wxCoord *w, wxCoord *h) const
);
#endif // WXWIN_COMPATIBILITY_3_0
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);
virtual double GetContentScaleFactor() const { return m_contentScaleFactor; }
#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, const wxPoint points[],
wxCoord xoffset, wxCoord yoffset ) = 0;
virtual void DrawLines(const wxPointList *list,
wxCoord xoffset, wxCoord yoffset );
virtual void DoDrawPolygon(int n, const wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0;
virtual void DoDrawPolyPolygon(int n, const int count[], const 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, const 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:
// This method exists for backwards compatibility only (while it's not
// documented, there are derived classes using it outside wxWidgets
// itself), don't use it in any new code and just call wxDCImpl version of
// DestroyClippingRegion() to reset the clipping information instead.
void ResetClipping()
{
m_clipping = false;
m_clipX1 = m_clipX2 = m_clipY1 = m_clipY2 = 0;
}
// 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);
// Return the number of pixels per mm in the horizontal and vertical
// directions, respectively.
//
// If the physical size of the DC is not known, or doesn't make sense, as
// for a SVG DC, for example, a fixed value corresponding to the standard
// DPI is used.
double GetMMToPXx() const;
double GetMMToPXy() const;
// 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
double m_contentScaleFactor; // used by high resolution displays (retina)
// Pixel per mm in horizontal and vertical directions.
//
// These variables are computed on demand by GetMMToPX[xy]() functions,
// don't access them directly other than for assigning to them.
mutable double m_mm_to_pix_x,
m_mm_to_pix_y;
// bounding and clipping boxes
wxCoord m_minX, m_minY, m_maxX, m_maxY; // Bounding box is stored in device units.
wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2; // Clipping box is stored in logical units.
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:
// Return the full DC area in logical coordinates.
wxRect GetLogicalArea() const;
wxDECLARE_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(); }
double GetContentScaleFactor() const
{ return m_pimpl->GetContentScaleFactor(); }
// 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(); }
bool GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
{
wxRect r;
const bool clipping = m_pimpl->DoGetClippingRect(r);
if ( x )
*x = r.x;
if ( y )
*y = r.y;
if ( w )
*w = r.width;
if ( h )
*h = r.height;
return clipping;
}
bool GetClippingBox(wxRect& rect) const
{ return m_pimpl->DoGetClippingRect(rect); }
// coordinates conversions and transforms
wxCoord DeviceToLogicalX(wxCoord x) const
{ return m_pimpl->DeviceToLogicalX(x); }
wxCoord DeviceToLogicalY(wxCoord y) const
{ return m_pimpl->DeviceToLogicalY(y); }
wxCoord DeviceToLogicalXRel(wxCoord x) const
{ return m_pimpl->DeviceToLogicalXRel(x); }
wxCoord DeviceToLogicalYRel(wxCoord y) const
{ return m_pimpl->DeviceToLogicalYRel(y); }
wxCoord LogicalToDeviceX(wxCoord x) const
{ return m_pimpl->LogicalToDeviceX(x); }
wxCoord LogicalToDeviceY(wxCoord y) const
{ return m_pimpl->LogicalToDeviceY(y); }
wxCoord LogicalToDeviceXRel(wxCoord x) const
{ return m_pimpl->LogicalToDeviceXRel(x); }
wxCoord LogicalToDeviceYRel(wxCoord y) const
{ return m_pimpl->LogicalToDeviceYRel(y); }
void SetMapMode(wxMappingMode mode)
{ m_pimpl->SetMapMode(mode); }
wxMappingMode GetMapMode() const
{ return m_pimpl->GetMapMode(); }
void SetUserScale(double x, double y)
{ m_pimpl->SetUserScale(x,y); }
void GetUserScale(double *x, double *y) const
{ m_pimpl->GetUserScale( x, y ); }
void SetLogicalScale(double x, double y)
{ m_pimpl->SetLogicalScale( x, y ); }
void GetLogicalScale(double *x, double *y) const
{ m_pimpl->GetLogicalScale( x, y ); }
void SetLogicalOrigin(wxCoord x, wxCoord y)
{ m_pimpl->SetLogicalOrigin(x,y); }
void GetLogicalOrigin(wxCoord *x, wxCoord *y) const
{ m_pimpl->DoGetLogicalOrigin(x, y); }
wxPoint GetLogicalOrigin() const
{ wxCoord x, y; m_pimpl->DoGetLogicalOrigin(&x, &y); return wxPoint(x, y); }
void SetDeviceOrigin(wxCoord x, wxCoord y)
{ m_pimpl->SetDeviceOrigin( x, y); }
void GetDeviceOrigin(wxCoord *x, wxCoord *y) const
{ m_pimpl->DoGetDeviceOrigin(x, y); }
wxPoint GetDeviceOrigin() const
{ wxCoord x, y; m_pimpl->DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); }
void SetAxisOrientation(bool xLeftRight, bool yBottomUp)
{ m_pimpl->SetAxisOrientation(xLeftRight, yBottomUp); }
#if wxUSE_DC_TRANSFORM_MATRIX
bool CanUseTransformMatrix() const
{ return m_pimpl->CanUseTransformMatrix(); }
bool SetTransformMatrix(const wxAffineMatrix2D &matrix)
{ return m_pimpl->SetTransformMatrix(matrix); }
wxAffineMatrix2D GetTransformMatrix() const
{ return m_pimpl->GetTransformMatrix(); }
void ResetTransformMatrix()
{ m_pimpl->ResetTransformMatrix(); }
#endif // wxUSE_DC_TRANSFORM_MATRIX
// mostly internal
void SetDeviceLocalOrigin( wxCoord x, wxCoord y )
{ m_pimpl->SetDeviceLocalOrigin( x, y ); }
// -----------------------------------------------
// the actual drawing API
bool FloodFill(wxCoord x, wxCoord y, const wxColour& col,
wxFloodFillStyle style = wxFLOOD_SURFACE)
{ return m_pimpl->DoFloodFill(x, y, col, style); }
bool FloodFill(const wxPoint& pt, const wxColour& col,
wxFloodFillStyle style = wxFLOOD_SURFACE)
{ return m_pimpl->DoFloodFill(pt.x, pt.y, col, style); }
// fill the area specified by rect with a radial gradient, starting from
// initialColour in the centre of the cercle and fading to destColour.
void GradientFillConcentric(const wxRect& rect,
const wxColour& initialColour,
const wxColour& destColour)
{ m_pimpl->DoGradientFillConcentric( rect, initialColour, destColour,
wxPoint(rect.GetWidth() / 2,
rect.GetHeight() / 2)); }
void GradientFillConcentric(const wxRect& rect,
const wxColour& initialColour,
const wxColour& destColour,
const wxPoint& circleCenter)
{ m_pimpl->DoGradientFillConcentric(rect, initialColour, destColour, circleCenter); }
// fill the area specified by rect with a linear gradient
void GradientFillLinear(const wxRect& rect,
const wxColour& initialColour,
const wxColour& destColour,
wxDirection nDirection = wxEAST)
{ m_pimpl->DoGradientFillLinear(rect, initialColour, destColour, nDirection); }
bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const
{ return m_pimpl->DoGetPixel(x, y, col); }
bool GetPixel(const wxPoint& pt, wxColour *col) const
{ return m_pimpl->DoGetPixel(pt.x, pt.y, col); }
void DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
{ m_pimpl->DoDrawLine(x1, y1, x2, y2); }
void DrawLine(const wxPoint& pt1, const wxPoint& pt2)
{ m_pimpl->DoDrawLine(pt1.x, pt1.y, pt2.x, pt2.y); }
void CrossHair(wxCoord x, wxCoord y)
{ m_pimpl->DoCrossHair(x, y); }
void CrossHair(const wxPoint& pt)
{ m_pimpl->DoCrossHair(pt.x, pt.y); }
void DrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
wxCoord xc, wxCoord yc)
{ m_pimpl->DoDrawArc(x1, y1, x2, y2, xc, yc); }
void DrawArc(const wxPoint& pt1, const wxPoint& pt2, const wxPoint& centre)
{ m_pimpl->DoDrawArc(pt1.x, pt1.y, pt2.x, pt2.y, centre.x, centre.y); }
void DrawCheckMark(wxCoord x, wxCoord y,
wxCoord width, wxCoord height)
{ m_pimpl->DoDrawCheckMark(x, y, width, height); }
void DrawCheckMark(const wxRect& rect)
{ m_pimpl->DoDrawCheckMark(rect.x, rect.y, rect.width, rect.height); }
void DrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
double sa, double ea)
{ m_pimpl->DoDrawEllipticArc(x, y, w, h, sa, ea); }
void DrawEllipticArc(const wxPoint& pt, const wxSize& sz,
double sa, double ea)
{ m_pimpl->DoDrawEllipticArc(pt.x, pt.y, sz.x, sz.y, sa, ea); }
void DrawPoint(wxCoord x, wxCoord y)
{ m_pimpl->DoDrawPoint(x, y); }
void DrawPoint(const wxPoint& pt)
{ m_pimpl->DoDrawPoint(pt.x, pt.y); }
void DrawLines(int n, const wxPoint points[],
wxCoord xoffset = 0, wxCoord yoffset = 0)
{ m_pimpl->DoDrawLines(n, points, xoffset, yoffset); }
void DrawLines(const wxPointList *list,
wxCoord xoffset = 0, wxCoord yoffset = 0)
{ m_pimpl->DrawLines( list, xoffset, yoffset ); }
#if WXWIN_COMPATIBILITY_2_8
wxDEPRECATED( void DrawLines(const wxList *list,
wxCoord xoffset = 0, wxCoord yoffset = 0) );
#endif // WXWIN_COMPATIBILITY_2_8
void DrawPolygon(int n, const wxPoint points[],
wxCoord xoffset = 0, wxCoord yoffset = 0,
wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
{ m_pimpl->DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); }
void DrawPolygon(const wxPointList *list,
wxCoord xoffset = 0, wxCoord yoffset = 0,
wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
{ m_pimpl->DrawPolygon( list, xoffset, yoffset, fillStyle ); }
void DrawPolyPolygon(int n, const int count[], const wxPoint points[],
wxCoord xoffset = 0, wxCoord yoffset = 0,
wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
{ m_pimpl->DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle); }
#if WXWIN_COMPATIBILITY_2_8
wxDEPRECATED( void DrawPolygon(const wxList *list,
wxCoord xoffset = 0, wxCoord yoffset = 0,
wxPolygonFillMode fillStyle = wxODDEVEN_RULE) );
#endif // WXWIN_COMPATIBILITY_2_8
void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{ m_pimpl->DoDrawRectangle(x, y, width, height); }
void DrawRectangle(const wxPoint& pt, const wxSize& sz)
{ m_pimpl->DoDrawRectangle(pt.x, pt.y, sz.x, sz.y); }
void DrawRectangle(const wxRect& rect)
{ m_pimpl->DoDrawRectangle(rect.x, rect.y, rect.width, rect.height); }
void DrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height,
double radius)
{ m_pimpl->DoDrawRoundedRectangle(x, y, width, height, radius); }
void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz,
double radius)
{ m_pimpl->DoDrawRoundedRectangle(pt.x, pt.y, sz.x, sz.y, radius); }
void DrawRoundedRectangle(const wxRect& r, double radius)
{ m_pimpl->DoDrawRoundedRectangle(r.x, r.y, r.width, r.height, radius); }
void DrawCircle(wxCoord x, wxCoord y, wxCoord radius)
{ m_pimpl->DoDrawEllipse(x - radius, y - radius, 2*radius, 2*radius); }
void DrawCircle(const wxPoint& pt, wxCoord radius)
{ m_pimpl->DoDrawEllipse(pt.x - radius, pt.y - radius, 2*radius, 2*radius); }
void DrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{ m_pimpl->DoDrawEllipse(x, y, width, height); }
void DrawEllipse(const wxPoint& pt, const wxSize& sz)
{ m_pimpl->DoDrawEllipse(pt.x, pt.y, sz.x, sz.y); }
void DrawEllipse(const wxRect& rect)
{ m_pimpl->DoDrawEllipse(rect.x, rect.y, rect.width, rect.height); }
void DrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
{ m_pimpl->DoDrawIcon(icon, x, y); }
void DrawIcon(const wxIcon& icon, const wxPoint& pt)
{ m_pimpl->DoDrawIcon(icon, pt.x, pt.y); }
void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
bool useMask = false)
{ m_pimpl->DoDrawBitmap(bmp, x, y, useMask); }
void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt,
bool useMask = false)
{ m_pimpl->DoDrawBitmap(bmp, pt.x, pt.y, useMask); }
void DrawText(const wxString& text, wxCoord x, wxCoord y)
{ m_pimpl->DoDrawText(text, x, y); }
void DrawText(const wxString& text, const wxPoint& pt)
{ m_pimpl->DoDrawText(text, pt.x, pt.y); }
void DrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
{ m_pimpl->DoDrawRotatedText(text, x, y, angle); }
void DrawRotatedText(const wxString& text, const wxPoint& pt, double angle)
{ m_pimpl->DoDrawRotatedText(text, pt.x, pt.y, angle); }
// this version puts both optional bitmap and the text into the given
// rectangle and aligns is as specified by alignment parameter; it also
// will emphasize the character with the given index if it is != -1 and
// return the bounding rectangle if required
void DrawLabel(const wxString& text,
const wxBitmap& image,
const wxRect& rect,
int alignment = wxALIGN_LEFT | wxALIGN_TOP,
int indexAccel = -1,
wxRect *rectBounding = NULL);
void DrawLabel(const wxString& text, const wxRect& rect,
int alignment = wxALIGN_LEFT | wxALIGN_TOP,
int indexAccel = -1)
{ DrawLabel(text, wxNullBitmap, rect, alignment, indexAccel); }
bool Blit(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)
{
return m_pimpl->DoBlit(xdest, ydest, width, height,
source, xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
}
bool Blit(const wxPoint& destPt, const wxSize& sz,
wxDC *source, const wxPoint& srcPt,
wxRasterOperationMode rop = wxCOPY, bool useMask = false,
const wxPoint& srcPtMask = wxDefaultPosition)
{
return m_pimpl->DoBlit(destPt.x, destPt.y, sz.x, sz.y,
source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y);
}
bool StretchBlit(wxCoord dstX, wxCoord dstY,
wxCoord dstWidth, wxCoord dstHeight,
wxDC *source,
wxCoord srcX, wxCoord srcY,
wxCoord srcWidth, wxCoord srcHeight,
wxRasterOperationMode rop = wxCOPY, bool useMask = false,
wxCoord srcMaskX = wxDefaultCoord, wxCoord srcMaskY = wxDefaultCoord)
{
return m_pimpl->DoStretchBlit(dstX, dstY, dstWidth, dstHeight,
source, srcX, srcY, srcWidth, srcHeight, rop, useMask, srcMaskX, srcMaskY);
}
bool StretchBlit(const wxPoint& dstPt, const wxSize& dstSize,
wxDC *source, const wxPoint& srcPt, const wxSize& srcSize,
wxRasterOperationMode rop = wxCOPY, bool useMask = false,
const wxPoint& srcMaskPt = wxDefaultPosition)
{
return m_pimpl->DoStretchBlit(dstPt.x, dstPt.y, dstSize.x, dstSize.y,
source, srcPt.x, srcPt.y, srcSize.x, srcSize.y, rop, useMask, srcMaskPt.x, srcMaskPt.y);
}
wxBitmap GetAsBitmap(const wxRect *subrect = (const wxRect *) NULL) const
{
return m_pimpl->DoGetAsBitmap(subrect);
}
#if wxUSE_SPLINES
void DrawSpline(wxCoord x1, wxCoord y1,
wxCoord x2, wxCoord y2,
wxCoord x3, wxCoord y3)
{ m_pimpl->DrawSpline(x1,y1,x2,y2,x3,y3); }
void DrawSpline(int n, const wxPoint points[])
{ m_pimpl->DrawSpline(n,points); }
void DrawSpline(const wxPointList *points)
{ m_pimpl->DrawSpline(points); }
#endif // wxUSE_SPLINES
#if WXWIN_COMPATIBILITY_2_8
// for compatibility with the old code when wxCoord was long everywhere
wxDEPRECATED( void GetTextExtent(const wxString& string,
long *x, long *y,
long *descent = NULL,
long *externalLeading = NULL,
const wxFont *theFont = NULL) const );
wxDEPRECATED( void GetLogicalOrigin(long *x, long *y) const );
wxDEPRECATED( void GetDeviceOrigin(long *x, long *y) const );
wxDEPRECATED( void GetClippingBox(long *x, long *y, long *w, long *h) const );
wxDEPRECATED( void DrawObject(wxDrawObject* drawobject) );
#endif // WXWIN_COMPATIBILITY_2_8
#ifdef __WXMSW__
// GetHDC() is the simplest way to retrieve an HDC From a wxDC but only
// works if this wxDC is GDI-based and fails for GDI+ contexts (and
// anything else without HDC, e.g. wxPostScriptDC)
WXHDC GetHDC() const;
// don't use these methods manually, use GetTempHDC() instead
virtual WXHDC AcquireHDC() { return GetHDC(); }
virtual void ReleaseHDC(WXHDC WXUNUSED(hdc)) { }
// helper class holding the result of GetTempHDC() with std::auto_ptr<>-like
// semantics, i.e. it is moved when copied
class TempHDC
{
public:
TempHDC(wxDC& dc)
: m_dc(dc),
m_hdc(dc.AcquireHDC())
{
}
TempHDC(const TempHDC& thdc)
: m_dc(thdc.m_dc),
m_hdc(thdc.m_hdc)
{
const_cast<TempHDC&>(thdc).m_hdc = 0;
}
~TempHDC()
{
if ( m_hdc )
m_dc.ReleaseHDC(m_hdc);
}
WXHDC GetHDC() const { return m_hdc; }
private:
wxDC& m_dc;
WXHDC m_hdc;
wxDECLARE_NO_ASSIGN_CLASS(TempHDC);
};
// GetTempHDC() also works for wxGCDC (but still not for wxPostScriptDC &c)
TempHDC GetTempHDC() { return TempHDC(*this); }
#endif // __WXMSW__
#if wxUSE_GRAPHICS_CONTEXT
virtual wxGraphicsContext* GetGraphicsContext() const
{
return m_pimpl->GetGraphicsContext();
}
virtual void SetGraphicsContext( wxGraphicsContext* ctx )
{
m_pimpl->SetGraphicsContext(ctx);
}
#endif
protected:
// ctor takes ownership of the pointer
wxDC(wxDCImpl *pimpl) : m_pimpl(pimpl) { }
wxDCImpl * const m_pimpl;
private:
wxDECLARE_ABSTRACT_CLASS(wxDC);
wxDECLARE_NO_COPY_CLASS(wxDC);
};
// ----------------------------------------------------------------------------
// helper class: you can use it to temporarily change the DC text colour and
// restore it automatically when the object goes out of scope
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCTextColourChanger
{
public:
wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { }
wxDCTextColourChanger(wxDC& dc, const wxColour& col) : m_dc(dc)
{
Set(col);
}
~wxDCTextColourChanger()
{
if ( m_colFgOld.IsOk() )
m_dc.SetTextForeground(m_colFgOld);
}
void Set(const wxColour& col)
{
if ( !m_colFgOld.IsOk() )
m_colFgOld = m_dc.GetTextForeground();
m_dc.SetTextForeground(col);
}
private:
wxDC& m_dc;
wxColour m_colFgOld;
wxDECLARE_NO_COPY_CLASS(wxDCTextColourChanger);
};
// ----------------------------------------------------------------------------
// helper class: you can use it to temporarily change the DC text background colour and
// restore it automatically when the object goes out of scope
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCTextBgColourChanger
{
public:
wxDCTextBgColourChanger(wxDC& dc) : m_dc(dc) { }
wxDCTextBgColourChanger(wxDC& dc, const wxColour& col) : m_dc(dc)
{
Set(col);
}
~wxDCTextBgColourChanger()
{
if ( m_colBgOld.IsOk() )
m_dc.SetTextBackground(m_colBgOld);
}
void Set(const wxColour& col)
{
if ( !m_colBgOld.IsOk() )
m_colBgOld = m_dc.GetTextBackground();
m_dc.SetTextBackground(col);
}
private:
wxDC& m_dc;
wxColour m_colBgOld;
wxDECLARE_NO_COPY_CLASS(wxDCTextBgColourChanger);
};
// ----------------------------------------------------------------------------
// helper class: you can use it to temporarily change the DC text background mode and
// restore it automatically when the object goes out of scope
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCTextBgModeChanger
{
public:
wxDCTextBgModeChanger(wxDC& dc) : m_dc(dc), m_modeOld(wxBRUSHSTYLE_INVALID) { }
wxDCTextBgModeChanger(wxDC& dc, int mode) : m_dc(dc)
{
Set(mode);
}
~wxDCTextBgModeChanger()
{
if ( m_modeOld != wxBRUSHSTYLE_INVALID )
m_dc.SetBackgroundMode(m_modeOld);
}
void Set(int mode)
{
if ( m_modeOld == wxBRUSHSTYLE_INVALID )
m_modeOld = m_dc.GetBackgroundMode();
m_dc.SetBackgroundMode(mode);
}
private:
wxDC& m_dc;
int m_modeOld;
wxDECLARE_NO_COPY_CLASS(wxDCTextBgModeChanger);
};
// ----------------------------------------------------------------------------
// helper class: you can use it to temporarily change the DC pen and
// restore it automatically when the object goes out of scope
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCPenChanger
{
public:
wxDCPenChanger(wxDC& dc, const wxPen& pen) : m_dc(dc), m_penOld(dc.GetPen())
{
m_dc.SetPen(pen);
}
~wxDCPenChanger()
{
if ( m_penOld.IsOk() )
m_dc.SetPen(m_penOld);
}
private:
wxDC& m_dc;
wxPen m_penOld;
wxDECLARE_NO_COPY_CLASS(wxDCPenChanger);
};
// ----------------------------------------------------------------------------
// helper class: you can use it to temporarily change the DC brush and
// restore it automatically when the object goes out of scope
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCBrushChanger
{
public:
wxDCBrushChanger(wxDC& dc, const wxBrush& brush) : m_dc(dc), m_brushOld(dc.GetBrush())
{
m_dc.SetBrush(brush);
}
~wxDCBrushChanger()
{
if ( m_brushOld.IsOk() )
m_dc.SetBrush(m_brushOld);
}
private:
wxDC& m_dc;
wxBrush m_brushOld;
wxDECLARE_NO_COPY_CLASS(wxDCBrushChanger);
};
// ----------------------------------------------------------------------------
// another small helper class: sets the clipping region in its ctor and
// destroys it in the dtor
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCClipper
{
public:
wxDCClipper(wxDC& dc, const wxRegion& r) : m_dc(dc)
{
Init(r.GetBox());
}
wxDCClipper(wxDC& dc, const wxRect& r) : m_dc(dc)
{
Init(r);
}
wxDCClipper(wxDC& dc, wxCoord x, wxCoord y, wxCoord w, wxCoord h) : m_dc(dc)
{
Init(wxRect(x, y, w, h));
}
~wxDCClipper()
{
m_dc.DestroyClippingRegion();
if ( m_restoreOld )
m_dc.SetClippingRegion(m_oldClipRect);
}
private:
// Common part of all ctors.
void Init(const wxRect& r)
{
m_restoreOld = m_dc.GetClippingBox(m_oldClipRect);
m_dc.SetClippingRegion(r);
}
wxDC& m_dc;
wxRect m_oldClipRect;
bool m_restoreOld;
wxDECLARE_NO_COPY_CLASS(wxDCClipper);
};
// ----------------------------------------------------------------------------
// helper class: you can use it to temporarily change the DC font and
// restore it automatically when the object goes out of scope
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDCFontChanger
{
public:
wxDCFontChanger(wxDC& dc)
: m_dc(dc), m_fontOld()
{
}
wxDCFontChanger(wxDC& dc, const wxFont& font)
: m_dc(dc), m_fontOld(dc.GetFont())
{
m_dc.SetFont(font);
}
void Set(const wxFont& font)
{
if ( !m_fontOld.IsOk() )
m_fontOld = m_dc.GetFont();
m_dc.SetFont(font);
}
~wxDCFontChanger()
{
if ( m_fontOld.IsOk() )
m_dc.SetFont(m_fontOld);
}
private:
wxDC& m_dc;
wxFont m_fontOld;
wxDECLARE_NO_COPY_CLASS(wxDCFontChanger);
};
#endif // _WX_DC_H_BASE_
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