/////////////////////////////////////////////////////////////////////////////
// Name: wx/dc.h
// Purpose: wxDC class
-// Author: Vadim Zeitlin
+// Author: Vadim Zeitlin
// Modified by:
// Created: 05/25/99
// RCS-ID: $Id$
#include "wx/dynarray.h"
#include "wx/math.h"
#include "wx/image.h"
-#include "wx/cmndata.h"
+#include "wx/region.h"
+#include "wx/affinematrix2d.h"
#define wxUSE_NEW_DC 1
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:
-
- wxDrawObject()
+ wxDEPRECATED_CONSTRUCTOR(wxDrawObject)()
: m_isBBoxValid(false)
, m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
{ }
wxCoord m_minX, m_minY, m_maxX, m_maxY;
};
+#endif // WXWIN_COMPATIBILITY_2_8
+
//-----------------------------------------------------------------------------
// wxDCFactory
{
public:
wxDCImpl( wxDC *owner );
- ~wxDCImpl();
+ virtual ~wxDCImpl();
wxDC *GetOwner() const { return m_owner; }
// setters and getters
virtual void SetFont(const wxFont& font) = 0;
- virtual const wxFont& GetFont() const { return m_font; }
+ virtual const wxFont& GetFont() const { return m_font; }
virtual void SetPen(const wxPen& pen) = 0;
- virtual const wxPen& GetPen() const { return m_pen; }
+ virtual const wxPen& GetPen() const { return m_pen; }
virtual void SetBrush(const wxBrush& brush) = 0;
- virtual const wxBrush& GetBrush() const { return m_brush; }
+ virtual const wxBrush& GetBrush() const { return m_brush; }
virtual void SetBackground(const wxBrush& brush) = 0;
- virtual const wxBrush& GetBackground() const { return m_backgroundBrush; }
+ 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 const wxColour& GetTextForeground() const
+ { return m_textForegroundColour; }
virtual void SetTextBackground(const wxColour& colour)
{ m_textBackgroundColour = colour; }
- virtual const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
+ 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(int function) = 0;
- virtual int GetLogicalFunction() const { return m_logicalFunction; }
+ 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,
virtual wxCoord LogicalToDeviceXRel(wxCoord x) const;
virtual wxCoord LogicalToDeviceYRel(wxCoord y) const;
- virtual void SetMapMode(int mode);
- virtual int GetMapMode() const { return m_mappingMode; }
+ 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
}
virtual void SetLogicalScale(double x, double y);
- virtual void GetLogicalScale(double *x, double *y)
+ virtual void GetLogicalScale(double *x, double *y) const
{
if ( x ) *x = m_logicalScaleX;
if ( y ) *y = m_logicalScaleY;
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,
- int style = wxFLOOD_SURFACE) = 0;
+ wxFloodFillStyle style = wxFLOOD_SURFACE) = 0;
virtual void DoGradientFillLinear(const wxRect& rect,
const wxColour& initialColour,
wxCoord width, wxCoord height,
wxDC *source,
wxCoord xsrc, wxCoord ysrc,
- int rop = wxCOPY,
+ wxRasterOperationMode rop = wxCOPY,
bool useMask = false,
wxCoord xsrcMask = wxDefaultCoord,
wxCoord ysrcMask = wxDefaultCoord) = 0;
wxDC *source,
wxCoord xsrc, wxCoord ysrc,
wxCoord srcWidth, wxCoord srcHeight,
- int rop = wxCOPY,
+ wxRasterOperationMode rop = wxCOPY,
bool useMask = false,
wxCoord xsrcMask = wxDefaultCoord,
wxCoord ysrcMask = wxDefaultCoord);
wxCoord xoffset, wxCoord yoffset );
virtual void DoDrawPolygon(int n, wxPoint points[],
- wxCoord xoffset, wxCoord yoffset,
- int fillStyle = wxODDEVEN_RULE) = 0;
+ wxCoord xoffset, wxCoord yoffset,
+ wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0;
virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
- int fillStyle);
+ wxPolygonFillMode fillStyle);
void DrawPolygon(const wxPointList *list,
wxCoord xoffset, wxCoord yoffset,
- int fillStyle );
+ wxPolygonFillMode fillStyle );
#if wxUSE_SPLINES
// ---------------------------------------------------------
// wxPrinterDC Impl API
- virtual wxRect GetPaperRect()
+ virtual wxRect GetPaperRect() const
{ int w = 0; int h = 0; DoGetSize( &w, &h ); return wxRect(0,0,w,h); }
- virtual int GetResolution()
+ 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;
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;
wxCoord m_minX, m_minY, m_maxX, m_maxY;
wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2;
- int m_logicalFunction;
+ wxRasterOperationMode m_logicalFunction;
int m_backgroundMode;
- int m_mappingMode;
+ wxMappingMode m_mappingMode;
wxPen m_pen;
wxBrush m_brush;
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()
wxSize GetPPI() const
{ return m_pimpl->GetPPI(); }
- virtual int GetResolution()
+ virtual int GetResolution() const
{ return m_pimpl->GetResolution(); }
// Right-To-Left (RTL) modes
// logical functions
- void SetLogicalFunction(int function)
+ void SetLogicalFunction(wxRasterOperationMode function)
{ m_pimpl->SetLogicalFunction(function); }
- int GetLogicalFunction() const
+ wxRasterOperationMode GetLogicalFunction() const
{ return m_pimpl->GetLogicalFunction(); }
// text measurement
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 LogicalToDeviceYRel(wxCoord y) const
{ return m_pimpl->LogicalToDeviceYRel(y); }
- void SetMapMode(int mode)
+ void SetMapMode(wxMappingMode mode)
{ m_pimpl->SetMapMode(mode); }
- int GetMapMode() const
+ wxMappingMode GetMapMode() const
{ return m_pimpl->GetMapMode(); }
void SetUserScale(double x, double y)
void SetLogicalScale(double x, double y)
{ m_pimpl->SetLogicalScale( x, y ); }
- void GetLogicalScale(double *x, double *y)
+ void GetLogicalScale(double *x, double *y) const
{ m_pimpl->GetLogicalScale( x, y ); }
void SetLogicalOrigin(wxCoord x, wxCoord 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 ); }
- // draw generic object
-
- void DrawObject(wxDrawObject* drawobject)
- {
- drawobject->Draw(*this);
- CalcBoundingBox(drawobject->MinX(),drawobject->MinY());
- CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY());
- }
-
// -----------------------------------------------
// the actual drawing API
bool FloodFill(wxCoord x, wxCoord y, const wxColour& col,
- int style = wxFLOOD_SURFACE)
+ wxFloodFillStyle style = wxFLOOD_SURFACE)
{ return m_pimpl->DoFloodFill(x, y, col, style); }
bool FloodFill(const wxPoint& pt, const wxColour& col,
- int style = wxFLOOD_SURFACE)
+ 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
void DrawPolygon(int n, wxPoint points[],
wxCoord xoffset = 0, wxCoord yoffset = 0,
- int fillStyle = wxODDEVEN_RULE)
+ wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
{ m_pimpl->DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); }
void DrawPolygon(const wxPointList *list,
wxCoord xoffset = 0, wxCoord yoffset = 0,
- int fillStyle = wxODDEVEN_RULE)
+ 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,
- int fillStyle = wxODDEVEN_RULE)
+ 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,
- int fillStyle = wxODDEVEN_RULE) );
+ wxPolygonFillMode fillStyle = wxODDEVEN_RULE) );
#endif // WXWIN_COMPATIBILITY_2_8
void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
wxDC *source, wxCoord xsrc, wxCoord ysrc,
- int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord)
+ 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,
- int rop = wxCOPY, bool useMask = false, const wxPoint& srcPtMask = wxDefaultPosition)
+ 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);
wxDC *source,
wxCoord srcX, wxCoord srcY,
wxCoord srcWidth, wxCoord srcHeight,
- int rop = wxCOPY, bool useMask = false,
+ wxRasterOperationMode rop = wxCOPY, bool useMask = false,
wxCoord srcMaskX = wxDefaultCoord, wxCoord srcMaskY = wxDefaultCoord)
{
return m_pimpl->DoStretchBlit(dstX, dstY, dstWidth, dstHeight,
}
bool StretchBlit(const wxPoint& dstPt, const wxSize& dstSize,
wxDC *source, const wxPoint& srcPt, const wxSize& srcSize,
- int rop = wxCOPY, bool useMask = false, const wxPoint& srcMaskPt = wxDefaultPosition)
+ 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);
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
private:
DECLARE_ABSTRACT_CLASS(wxDC)
- DECLARE_NO_COPY_CLASS(wxDC)
+ wxDECLARE_NO_COPY_CLASS(wxDC);
};
// ----------------------------------------------------------------------------
~wxDCTextColourChanger()
{
- if ( m_colFgOld.Ok() )
+ if ( m_colFgOld.IsOk() )
m_dc.SetTextForeground(m_colFgOld);
}
void Set(const wxColour& col)
{
- if ( !m_colFgOld.Ok() )
+ if ( !m_colFgOld.IsOk() )
m_colFgOld = m_dc.GetTextForeground();
m_dc.SetTextForeground(col);
}
wxColour m_colFgOld;
- DECLARE_NO_COPY_CLASS(wxDCTextColourChanger)
+ wxDECLARE_NO_COPY_CLASS(wxDCTextColourChanger);
};
// ----------------------------------------------------------------------------
~wxDCPenChanger()
{
- if ( m_penOld.Ok() )
+ if ( m_penOld.IsOk() )
m_dc.SetPen(m_penOld);
}
wxPen m_penOld;
- DECLARE_NO_COPY_CLASS(wxDCPenChanger)
+ wxDECLARE_NO_COPY_CLASS(wxDCPenChanger);
};
// ----------------------------------------------------------------------------
~wxDCBrushChanger()
{
- if ( m_brushOld.Ok() )
+ if ( m_brushOld.IsOk() )
m_dc.SetBrush(m_brushOld);
}
wxBrush m_brushOld;
- DECLARE_NO_COPY_CLASS(wxDCBrushChanger)
+ wxDECLARE_NO_COPY_CLASS(wxDCBrushChanger);
};
// ----------------------------------------------------------------------------
private:
wxDC& m_dc;
- DECLARE_NO_COPY_CLASS(wxDCClipper)
+ 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_
projects / wxWidgets.git / blobdiff