X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c0c133e13b36a923c65f94499554e432bc3a0daa..f2049b683752950d1fe91aec07318e7f2122ff16:/include/wx/dc.h diff --git a/include/wx/dc.h b/include/wx/dc.h index f9fec15da9..f6346888ac 100644 --- a/include/wx/dc.h +++ b/include/wx/dc.h @@ -29,7 +29,8 @@ #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 @@ -104,19 +105,35 @@ enum wxFloodFillStyle wxFLOOD_BORDER }; -// Mapping modes (same values as used by Windows, don't change) +// Mapping modes enum wxMappingMode { wxMM_TEXT = 1, + wxMM_METRIC, wxMM_LOMETRIC, - wxMM_HIMETRIC, - wxMM_LOENGLISH, - wxMM_HIENGLISH, wxMM_TWIPS, - wxMM_ISOTROPIC, - wxMM_ANISOTROPIC, - wxMM_POINTS, - wxMM_METRIC + 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 @@ -373,13 +390,25 @@ public: // logical functions virtual void SetLogicalFunction(wxRasterOperationMode function) = 0; - virtual wxRasterOperationMode GetLogicalFunction() const + 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, @@ -462,6 +491,20 @@ public: 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(); @@ -469,6 +512,19 @@ public: // 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 @@ -707,6 +763,9 @@ private: 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() @@ -842,6 +901,15 @@ public: 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, @@ -961,6 +1029,20 @@ public: 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 ); } @@ -1134,7 +1216,7 @@ public: bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, - wxRasterOperationMode rop = wxCOPY, bool useMask = false, + wxRasterOperationMode rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord) { return m_pimpl->DoBlit(xdest, ydest, width, height, @@ -1142,7 +1224,7 @@ public: } bool Blit(const wxPoint& destPt, const wxSize& sz, wxDC *source, const wxPoint& srcPt, - wxRasterOperationMode rop = wxCOPY, bool useMask = false, + wxRasterOperationMode rop = wxCOPY, bool useMask = false, const wxPoint& srcPtMask = wxDefaultPosition) { return m_pimpl->DoBlit(destPt.x, destPt.y, sz.x, sz.y, @@ -1162,7 +1244,7 @@ public: } bool StretchBlit(const wxPoint& dstPt, const wxSize& dstSize, wxDC *source, const wxPoint& srcPt, const wxSize& srcSize, - wxRasterOperationMode rop = wxCOPY, bool useMask = false, + wxRasterOperationMode rop = wxCOPY, bool useMask = false, const wxPoint& srcMaskPt = wxDefaultPosition) { return m_pimpl->DoStretchBlit(dstPt.x, dstPt.y, dstSize.x, dstSize.y, @@ -1201,7 +1283,50 @@ public: #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(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: @@ -1232,13 +1357,13 @@ public: ~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); } @@ -1266,7 +1391,7 @@ public: ~wxDCPenChanger() { - if ( m_penOld.Ok() ) + if ( m_penOld.IsOk() ) m_dc.SetPen(m_penOld); } @@ -1293,7 +1418,7 @@ public: ~wxDCBrushChanger() { - if ( m_brushOld.Ok() ) + if ( m_brushOld.IsOk() ) m_dc.SetBrush(m_brushOld); } @@ -1336,14 +1461,27 @@ private: class WXDLLIMPEXP_CORE wxDCFontChanger { public: - wxDCFontChanger(wxDC& dc, const wxFont& font) : m_dc(dc), m_fontOld(dc.GetFont()) + 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.Ok() ) + if ( m_fontOld.IsOk() ) m_dc.SetFont(m_fontOld); }