X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/553aa032f2aac24b2b06bd8e38535118950976c1..2bf8f4c0d57be03ee27a0f84d041ebcb99202497:/include/wx/msw/dc.h diff --git a/include/wx/msw/dc.h b/include/wx/msw/dc.h index 5a82ad5609..0ab2cc622e 100644 --- a/include/wx/msw/dc.h +++ b/include/wx/msw/dc.h @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: dc.h +// Name: wx/msw/dc.h // Purpose: wxDC class // Author: Julian Smart // Modified by: @@ -9,15 +9,10 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifndef _WX_DC_H_ -#define _WX_DC_H_ - -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) - #pragma interface "dc.h" -#endif +#ifndef _WX_MSW_DC_H_ +#define _WX_MSW_DC_H_ #include "wx/defs.h" -#include "wx/dc.h" // --------------------------------------------------------------------------- // macros @@ -35,7 +30,7 @@ class wxDCCacheEntry: public wxObject public: wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth); wxDCCacheEntry(WXHDC hDC, int depth); - ~wxDCCacheEntry(); + virtual ~wxDCCacheEntry(); WXHBITMAP m_bitmap; WXHDC m_dc; @@ -45,11 +40,13 @@ public: }; #endif +// this is an ABC: use one of the derived classes to create a DC associated +// with a window, screen, printer and so on class WXDLLEXPORT wxDC : public wxDCBase { public: - wxDC(); - ~wxDC(); + wxDC(WXHDC hDC) { Init(); m_hDC = hDC; } + virtual ~wxDC(); // implement base class pure virtuals // ---------------------------------- @@ -75,12 +72,6 @@ public: virtual wxCoord GetCharHeight() const; virtual wxCoord GetCharWidth() const; - virtual void DoGetTextExtent(const wxString& string, - wxCoord *x, wxCoord *y, - wxCoord *descent = NULL, - wxCoord *externalLeading = NULL, - wxFont *theFont = NULL) const; - virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const; virtual bool CanDrawBitmap() const; virtual bool CanGetTextExtent() const; @@ -114,10 +105,17 @@ public: } WXHDC GetHDC() const { return m_hDC; } - void SetHDC(WXHDC dc, bool bOwnsDC = FALSE) + void SetHDC(WXHDC dc, bool bOwnsDC = false) { m_hDC = dc; m_bOwnsDC = bOwnsDC; + + // we might have a pre existing clipping region, make sure that we + // return it if asked -- but avoid calling ::GetClipBox() right now as + // it could be unnecessary wasteful + m_clipping = true; + m_clipX1 = + m_clipX2 = 0; } const wxBitmap& GetSelectedBitmap() const { return m_selectedBitmap; } @@ -135,10 +133,50 @@ public: static void ClearCache(); #endif + // RTL related functions + // --------------------- + + // get or change the layout direction (LTR or RTL) for this dc, + // wxLayout_Default is returned if layout direction is not supported + virtual wxLayoutDirection GetLayoutDirection() const; + virtual void SetLayoutDirection(wxLayoutDirection dir); + protected: + void Init() + { + m_canvas = NULL; + m_bOwnsDC = false; + m_hDC = NULL; + + m_oldBitmap = NULL; + m_oldPen = NULL; + m_oldBrush = NULL; + m_oldFont = NULL; + +#if wxUSE_PALETTE + m_oldPalette = NULL; +#endif // wxUSE_PALETTE + } + + // create an uninitialized DC: this should be only used by the derived + // classes + wxDC() { Init(); } + + virtual void DoGetTextExtent(const wxString& string, + wxCoord *x, wxCoord *y, + wxCoord *descent = NULL, + wxCoord *externalLeading = NULL, + wxFont *theFont = NULL) const; + virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const; + virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style = wxFLOOD_SURFACE); + virtual void DoGradientFillLinear(const wxRect& rect, + const wxColour& initialColour, + const wxColour& destColour, + wxDirection nDirection = wxEAST); + virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const; virtual void DoDrawPoint(wxCoord x, wxCoord y); @@ -158,11 +196,15 @@ protected: double radius); virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height); +#if wxUSE_SPLINES + virtual void DoDrawSpline(wxList *points); +#endif + virtual void DoCrossHair(wxCoord x, wxCoord y); virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y); virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, - bool useMask = FALSE); + bool useMask = false); virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y); virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, @@ -170,20 +212,16 @@ protected: virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, - int rop = wxCOPY, bool useMask = FALSE, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1); + int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord); // this is gnarly - we can't even call this function DoSetClippingRegion() // because of virtual function hiding virtual void DoSetClippingRegionAsRegion(const wxRegion& region); virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height); - virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y, - wxCoord *width, wxCoord *height) - { - GetClippingBox(x, y, width, height); - } + virtual void DoGetClippingBox(wxCoord *x, wxCoord *y, + wxCoord *w, wxCoord *h) const; - virtual void DoGetSize(int *width, int *height) const; virtual void DoGetSizeMM(int* width, int* height) const; virtual void DoDrawLines(int n, wxPoint points[], @@ -191,9 +229,11 @@ protected: virtual void DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle = wxODDEVEN_RULE); - virtual void DoDrawPolyPolygon(int n, int start[], wxPoint points[], + virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle = wxODDEVEN_RULE); + virtual wxBitmap DoGetAsBitmap(const wxRect *subrect) const + { return subrect == NULL ? GetSelectedBitmap() : GetSelectedBitmap().GetSubBitmap(*subrect); } #if wxUSE_PALETTE @@ -201,7 +241,7 @@ protected: // (tell windows to translate pixel from other palettes to our custom one // and vice versa) // Realize tells it to also reset the system palette to this one. - void DoSelectPalette(bool realize = FALSE); + void DoSelectPalette(bool realize = false); // Find out what palette our parent window has, then select it into the dc void InitializePalette(); @@ -213,6 +253,17 @@ protected: // common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion() void SetClippingHrgn(WXHRGN hrgn); + // implementation of DoGetSize() for wxScreen/PrinterDC: this simply + // returns the size of the entire device this DC is associated with + // + // notice that we intentionally put it in a separate function instead of + // DoGetSize() itself because we want it to remain pure virtual both + // because each derived class should take care to define it as needed (this + // implementation is not at all always appropriate) and because we want + // wxDC to be an ABC to prevent it from being created directly + void GetDeviceSize(int *width, int *height) const; + + // MSW-specific member variables // ----------------------------- @@ -249,19 +300,46 @@ protected: }; // ---------------------------------------------------------------------------- -// wxDCTemp: a wxDC which doesn't free the given HDC (used by wxWindows +// wxDCTemp: a wxDC which doesn't free the given HDC (used by wxWidgets // only/mainly) // ---------------------------------------------------------------------------- class WXDLLEXPORT wxDCTemp : public wxDC { public: - wxDCTemp(WXHDC hdc) { SetHDC(hdc); } - virtual ~wxDCTemp() { SetHDC((WXHDC)NULL); } + // construct a temporary DC with the specified HDC and size (it should be + // specified whenever we know it for this HDC) + wxDCTemp(WXHDC hdc, const wxSize& size = wxDefaultSize) + : wxDC(hdc), + m_size(size) + { + } + + virtual ~wxDCTemp() + { + // prevent base class dtor from freeing it + SetHDC((WXHDC)NULL); + } + +protected: + virtual void DoGetSize(int *w, int *h) const + { + wxASSERT_MSG( m_size.IsFullySpecified(), + _T("size of this DC hadn't been set and is unknown") ); + + if ( w ) + *w = m_size.x; + if ( h ) + *h = m_size.y; + } private: + // size of this DC must be explicitly set by SetSize() as we have no way to + // find it ourselves + const wxSize m_size; + DECLARE_NO_COPY_CLASS(wxDCTemp) }; -#endif - // _WX_DC_H_ +#endif // _WX_MSW_DC_H_ +