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wxWidgets/include/wx/dc.h
Vadim Zeitlin e29bf4b056 Add wxDC::GetFontMetrics() and implement it for wxMSW. 
Add a new wxDC method allowing to retrieve the font characteristics not
available from GetTextExtent(), notably the internal leading (and also the
average font width).

Currently this is implemented for wxMSW only, the internal leading is always 0
in the other ports.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67063 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2011-02-27 12:48:13 +00:00

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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"
#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;
// 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;
}
// 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)
{
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;
}
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);
// ---------------------------------------------------------
// 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; }
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(); }
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); }
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)
{ 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); }
// 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, 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, 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, int count[], 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, 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__
protected:
// ctor takes ownership of the pointer
wxDC(wxDCImpl *pimpl) : m_pimpl(pimpl) { }
wxDCImpl * const m_pimpl;
private:
DECLARE_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.Ok() )
m_dc.SetTextForeground(m_colFgOld);
}
void Set(const wxColour& col)
{
if ( !m_colFgOld.Ok() )
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 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.Ok() )
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.Ok() )
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)
{ dc.SetClippingRegion(r.GetBox()); }
wxDCClipper(wxDC& dc, const wxRect& r) : m_dc(dc)
{ dc.SetClippingRegion(r.x, r.y, r.width, r.height); }
wxDCClipper(wxDC& dc, wxCoord x, wxCoord y, wxCoord w, wxCoord h) : m_dc(dc)
{ dc.SetClippingRegion(x, y, w, h); }
~wxDCClipper() { m_dc.DestroyClippingRegion(); }
private:
wxDC& m_dc;
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.Ok() )
m_fontOld = m_dc.GetFont();
m_dc.SetFont(font);
}
~wxDCFontChanger()
{
if ( m_fontOld.Ok() )
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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