X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/68a514e71be44f27b52886fcf2856293622052e3..b09857ae000a60704207d63290be937584805fb0:/interface/wx/graphics.h?ds=inline diff --git a/interface/wx/graphics.h b/interface/wx/graphics.h index fa2ddf3160..ac46f91a31 100644 --- a/interface/wx/graphics.h +++ b/interface/wx/graphics.h @@ -1,158 +1,175 @@ ///////////////////////////////////////////////////////////////////////////// // Name: graphics.h -// Purpose: interface of wxGraphicsPath +// Purpose: interface of various wxGraphics* classes // Author: wxWidgets team // RCS-ID: $Id$ -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// /** @class wxGraphicsPath - A wxGraphicsPath is a native representation of an geometric path. The contents - are specific an private to the respective renderer. Instances are ref counted and can - therefore be assigned as usual. The only way to get a valid instance is via - wxGraphicsContext::CreatePath or wxGraphicsRenderer::CreatePath. + A wxGraphicsPath is a native representation of a geometric path. The + contents are specific an private to the respective renderer. Instances are + reference counted and can therefore be assigned as usual. The only way to + get a valid instance is by using wxGraphicsContext::CreatePath() or + wxGraphicsRenderer::CreatePath(). @library{wxcore} - @category{FIXME} + @category{gdi} */ class wxGraphicsPath : public wxGraphicsObject { public: - //@{ /** + Adds an arc of a circle. + + The circle is defined by the coordinates of its centre (@a x, @a y) or + @a c and its radius @a r. The arc goes from the starting angle @a + startAngle to @a endAngle either clockwise or counter-clockwise + depending on the value of @a clockwise argument. + The angles are measured in radians but, contrary to the usual + mathematical convention, are always @e clockwise from the horizontal + axis. */ - void AddArc(wxDouble x, wxDouble y, wxDouble r, - wxDouble startAngle, - wxDouble endAngle, bool clockwise); + //@{ + virtual void AddArc(wxDouble x, wxDouble y, wxDouble r, + wxDouble startAngle, wxDouble endAngle, + bool clockwise); void AddArc(const wxPoint2DDouble& c, wxDouble r, - wxDouble startAngle, - wxDouble endAngle, - bool clockwise); + wxDouble startAngle, wxDouble endAngle, bool clockwise); //@} /** - Appends a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to - (x2,y2), also a straight line from (current) to (x1,y1). + Appends a an arc to two tangents connecting (current) to (@a x1,@a y1) + and (@a x1,@a y1) to (@a x2,@a y2), also a straight line from (current) + to (@a x1,@a y1). */ - void AddArcToPoint(wxDouble x1, wxDouble y1, wxDouble x2, - wxDouble y2, - wxDouble r); + virtual void AddArcToPoint(wxDouble x1, wxDouble y1, wxDouble x2, + wxDouble y2, wxDouble r); /** - Appends a circle around (x,y) with radius r as a new closed subpath. + Appends a circle around (@a x,@a y) with radius @a r as a new closed + subpath. */ - void AddCircle(wxDouble x, wxDouble y, wxDouble r); + virtual void AddCircle(wxDouble x, wxDouble y, wxDouble r); - //@{ /** - + Adds a cubic bezier curve from the current point, using two control + points and an end point. + */ + virtual void AddCurveToPoint(wxDouble cx1, wxDouble cy1, + wxDouble cx2, wxDouble cy2, + wxDouble x, wxDouble y); + /** + Adds a cubic bezier curve from the current point, using two control + points and an end point. */ - void AddCurveToPoint(wxDouble cx1, wxDouble cy1, wxDouble cx2, - wxDouble cy2, - wxDouble x, - wxDouble y); void AddCurveToPoint(const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e); - //@} /** Appends an ellipse fitting into the passed in rectangle. */ - void AddEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h); + virtual void AddEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h); - //@{ /** - + Adds a straight line from the current point to (@a x,@a y). + */ + virtual void AddLineToPoint(wxDouble x, wxDouble y); + /** + Adds a straight line from the current point to @a p. */ - void AddLineToPoint(wxDouble x, wxDouble y); void AddLineToPoint(const wxPoint2DDouble& p); - //@} /** Adds another path. */ - void AddPath(const wxGraphicsPath& path); + virtual void AddPath(const wxGraphicsPath& path); /** - Adds a quadratic Bezier curve from the current point, using a control point and - an end point. + Adds a quadratic bezier curve from the current point, using a control + point and an end point. */ - void AddQuadCurveToPoint(wxDouble cx, wxDouble cy, wxDouble x, - wxDouble y); + virtual void AddQuadCurveToPoint(wxDouble cx, wxDouble cy, + wxDouble x, wxDouble y); /** Appends a rectangle as a new closed subpath. */ - void AddRectangle(wxDouble x, wxDouble y, wxDouble w, wxDouble h); + virtual void AddRectangle(wxDouble x, wxDouble y, wxDouble w, wxDouble h); /** Appends a rounded rectangle as a new closed subpath. */ - void AddRoundedRectangle(wxDouble x, wxDouble y, wxDouble w, - wxDouble h, - wxDouble radius); + virtual void AddRoundedRectangle(wxDouble x, wxDouble y, wxDouble w, + wxDouble h, wxDouble radius); /** Closes the current sub-path. */ - void CloseSubpath(); + virtual void CloseSubpath(); - //@{ /** - Returns @true if the point is within the path. + @return @true if the point is within the path. */ bool Contains(const wxPoint2DDouble& c, - int fillStyle = wxODDEVEN_RULE) const; - const bool Contains(wxDouble x, wxDouble y, - int fillStyle = wxODDEVEN_RULE) const; - //@} + wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const; + /** + @return @true if the point is within the path. + */ + virtual bool Contains(wxDouble x, wxDouble y, + wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const; - //@{ /** - Gets the bounding box enclosing all points (possibly including control points). + Gets the bounding box enclosing all points (possibly including control + points). */ wxRect2DDouble GetBox() const; - const void GetBox(wxDouble* x, wxDouble* y, wxDouble* w, - wxDouble* h) const; - //@} + /** + Gets the bounding box enclosing all points (possibly including control + points). + */ + virtual void GetBox(wxDouble* x, wxDouble* y, + wxDouble* w, wxDouble* h) const; - //@{ /** Gets the last point of the current path, (0,0) if not yet set. */ - void GetCurrentPoint(wxDouble* x, wxDouble* y) const; - const wxPoint2DDouble GetCurrentPoint() const; - //@} + virtual void GetCurrentPoint(wxDouble* x, wxDouble* y) const; + /** + Gets the last point of the current path, (0,0) if not yet set. + */ + wxPoint2DDouble GetCurrentPoint() const; /** - Returns the native path (CGPathRef for Core Graphics, Path pointer for GDIPlus - and a cairo_path_t pointer for cairo). + Returns the native path (CGPathRef for Core Graphics, Path pointer for + GDIPlus and a cairo_path_t pointer for cairo). */ - void* GetNativePath() const; + virtual void* GetNativePath() const; - //@{ /** - Begins a new subpath at (x,y) + Begins a new subpath at (@a x,@a y). + */ + virtual void MoveToPoint(wxDouble x, wxDouble y); + /** + Begins a new subpath at @a p. */ - void MoveToPoint(wxDouble x, wxDouble y); void MoveToPoint(const wxPoint2DDouble& p); - //@} /** Transforms each point of this path by the matrix. */ - void Transform(const wxGraphicsMatrix& matrix); + virtual void Transform(const wxGraphicsMatrix& matrix); /** - Gives back the native path returned by GetNativePath() because there might be - some deallocations necessary (eg on cairo the native path returned by - GetNativePath is newly allocated each time). + Gives back the native path returned by GetNativePath() because there + might be some deallocations necessary (e.g. on cairo the native path + returned by GetNativePath() is newly allocated each time). */ - void UnGetNativePath(void* p) const; + virtual void UnGetNativePath(void* p) const; }; @@ -164,7 +181,7 @@ public: allows reference counting. Not instantiated by user code. @library{wxcore} - @category{FIXME} + @category{gdi} @see wxGraphicsBrush, wxGraphicsPen, wxGraphicsMatrix, wxGraphicsPath */ @@ -172,36 +189,141 @@ class wxGraphicsObject : public wxObject { public: /** - Returns the renderer that was used to create this instance, or @NULL if it has - not been initialized yet + Returns the renderer that was used to create this instance, or @NULL + if it has not been initialized yet. */ wxGraphicsRenderer* GetRenderer() const; /** - Is this object valid (@false) or still empty (@true)? + @return @false if this object is valid, otherwise returns @true. */ bool IsNull() const; }; +/** + Anti-aliasing modes used by wxGraphicsContext::SetAntialiasMode(). +*/ +enum wxAntialiasMode +{ + /** No anti-aliasing */ + wxANTIALIAS_NONE, + /** The default anti-aliasing */ + wxANTIALIAS_DEFAULT, +}; + +/** + Interpolation quality used by wxGraphicsContext::SetInterpolationQuality(). + */ +enum wxInterpolationQuality +{ + /** default interpolation, based on type of context, in general medium quality */ + wxINTERPOLATION_DEFAULT, + /** no interpolation */ + wxINTERPOLATION_NONE, + /** fast interpolation, suited for interactivity */ + wxINTERPOLATION_FAST, + /** better quality */ + wxINTERPOLATION_GOOD, + /** best quality, not suited for interactivity */ + wxINTERPOLATION_BEST +}; + +/** + Compositing is done using Porter-Duff compositions + (see http://keithp.com/~keithp/porterduff/p253-porter.pdf) with + wxGraphicsContext::SetCompositionMode(). + + The description give a short equation on how the values of a resulting + pixel are calculated. + @e R = Result, @e S = Source, @e D = Destination, colors premultiplied with alpha + @e Ra, @e Sa, @e Da their alpha components +*/ +enum wxCompositionMode +{ + /** + Indicates invalid or unsupported composition mode. + + This value can't be passed to wxGraphicsContext::SetCompositionMode(). + + @since 2.9.2 + */ + wxCOMPOSITION_INVALID = -1, + wxCOMPOSITION_CLEAR, /**< @e R = 0 */ + wxCOMPOSITION_SOURCE, /**< @e R = S */ + wxCOMPOSITION_OVER, /**< @e R = @e S + @e D*(1 - @e Sa) */ + wxCOMPOSITION_IN, /**< @e R = @e S*@e Da */ + wxCOMPOSITION_OUT, /**< @e R = @e S*(1 - @e Da) */ + wxCOMPOSITION_ATOP, /**< @e R = @e S*@e Da + @e D*(1 - @e Sa) */ + + wxCOMPOSITION_DEST, /**< @e R = @e D, essentially a noop */ + wxCOMPOSITION_DEST_OVER, /**< @e R = @e S*(1 - @e Da) + @e D */ + wxCOMPOSITION_DEST_IN, /**< @e R = @e D*@e Sa */ + wxCOMPOSITION_DEST_OUT, /**< @e R = @e D*(1 - @e Sa) */ + wxCOMPOSITION_DEST_ATOP, /**< @e R = @e S*(1 - @e Da) + @e D*@e Sa */ + wxCOMPOSITION_XOR, /**< @e R = @e S*(1 - @e Da) + @e D*(1 - @e Sa) */ + wxCOMPOSITION_ADD /**< @e R = @e S + @e D */ +}; + +/** + Represents a bitmap. + + The objects of this class are not created directly but only via + wxGraphicsContext or wxGraphicsRenderer CreateBitmap(), + CreateBitmapFromImage() or CreateSubBitmap() methods. They can subsequently + be used with wxGraphicsContext::DrawBitmap(). The only other operation is + testing for the bitmap validity which can be performed using IsNull() + method inherited from the base class. + */ +class wxGraphicsBitmap : public wxGraphicsObject +{ +public: + /** + Default constructor creates an invalid bitmap. + */ + wxGraphicsBitmap() {} + + /** + Return the contents of this bitmap as wxImage. + + Using this method is more efficient than converting wxGraphicsBitmap to + wxBitmap first and then to wxImage and can be useful if, for example, + you want to save wxGraphicsBitmap as a disk file in a format not + directly supported by wxBitmap. + + Invalid image is returned if the bitmap is invalid. + + @since 2.9.3 + */ + wxImage ConvertToImage() const; + + /** + Return the pointer to the native bitmap data. (CGImageRef for Core Graphics, + cairo_surface_t for Cairo, Bitmap* for GDI+.) + + @since 2.9.4 + */ + void* GetNativeBitmap() const; +}; /** @class wxGraphicsContext - A wxGraphicsContext instance is the object that is drawn upon. It is created by - a renderer using wxGraphicsRenderer::CreateContext(). This can be either directly - using a renderer instance, or indirectly using the static convenience Create() - functions of wxGraphicsContext that always delegate the task to the default renderer. + A wxGraphicsContext instance is the object that is drawn upon. It is + created by a renderer using wxGraphicsRenderer::CreateContext(). This can + be either directly using a renderer instance, or indirectly using the + static convenience Create() functions of wxGraphicsContext that always + delegate the task to the default renderer. @code void MyCanvas::OnPaint(wxPaintEvent &event) { // Create paint DC wxPaintDC dc(this); - + // Create graphics context from it wxGraphicsContext *gc = wxGraphicsContext::Create( dc ); - + if (gc) { // make a path that contains a circle and some lines @@ -214,17 +336,16 @@ public: path.AddLineToPoint(50.0, 100.0 ); path.CloseSubpath(); path.AddRectangle(25.0, 25.0, 50.0, 50.0); - + gc->StrokePath(path); - + delete gc; } } @endcode - @library{wxcore} - @category{FIXME} + @category{gdi,dc} @see wxGraphicsRenderer::CreateContext(), wxGCDC, wxDC */ @@ -236,94 +357,176 @@ public: @see wxGraphicsRenderer::CreateContext() */ - static wxGraphicsContext* Create( wxWindow* window ) ; - + static wxGraphicsContext* Create(wxWindow* window); + /** Creates a wxGraphicsContext from a wxWindowDC @see wxGraphicsRenderer::CreateContext() */ - static wxGraphicsContext* Create( const wxWindowDC& dc) ; - + static wxGraphicsContext* Create(const wxWindowDC& windowDC); + /** Creates a wxGraphicsContext from a wxMemoryDC @see wxGraphicsRenderer::CreateContext() */ - static wxGraphicsContext * Create( const wxMemoryDC& dc) ; - + static wxGraphicsContext* Create(const wxMemoryDC& memoryDC); + + /** + Creates a wxGraphicsContext from a wxPrinterDC. Under GTK+, this will + only work when using the GtkPrint printing backend which is available + since GTK+ 2.10. + + @see wxGraphicsRenderer::CreateContext(), @ref overview_unixprinting + */ + static wxGraphicsContext* Create(const wxPrinterDC& printerDC); + /** - Creates a wxGraphicsContext from a wxPrinterDC. Under - GTK+, this will only work when using the GtkPrint - printing backend which is available since GTK+ 2.10. + Creates a wxGraphicsContext from a wxEnhMetaFileDC. + + This function, as wxEnhMetaFileDC class itself, is only available only + under MSW. - @see wxGraphicsRenderer::CreateContext(), @ref overview_unixprinting "Printing under Unix" + @see wxGraphicsRenderer::CreateContext() */ - static wxGraphicsContext * Create( const wxPrinterDC& dc) ; + static wxGraphicsContext* Create(const wxEnhMetaFileDC& metaFileDC); + + /** + Creates a wxGraphicsContext associated with a wxImage. + + The image specifies the size of the context as well as whether alpha is + supported (if wxImage::HasAlpha()) or not and the initial contents of + the context. The @a image object must have a life time greater than + that of the new context as the context copies its contents back to the + image when it is destroyed. + + @since 2.9.3 + */ + static wxGraphicsContext* Create(wxImage& image); /** - Clips drawings to the region + Clips drawings to the specified region. */ - void Clip(const wxRegion& region); + virtual void Clip(const wxRegion& region) = 0; /** - Clips drawings to the rectangle. + Clips drawings to the specified rectangle. */ - void Clip(wxDouble x, wxDouble y, wxDouble w, wxDouble h); + virtual void Clip(wxDouble x, wxDouble y, wxDouble w, wxDouble h) = 0; /** - Concatenates the passed in transform with the current transform of this context + Concatenates the passed in transform with the current transform of this + context. */ - void ConcatTransform(const wxGraphicsMatrix& matrix); + virtual void ConcatTransform(const wxGraphicsMatrix& matrix) = 0; + + /** + Creates wxGraphicsBitmap from an existing wxBitmap. + + Returns an invalid wxNullGraphicsBitmap on failure. + */ + virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0; + + /** + Creates wxGraphicsBitmap from an existing wxImage. + + This method is more efficient than converting wxImage to wxBitmap first + and then calling CreateBitmap() but otherwise has the same effect. + + Returns an invalid wxNullGraphicsBitmap on failure. + @since 2.9.3 + */ + virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image); + + /** + Extracts a sub-bitmap from an existing bitmap. + + Currently this function is implemented in the native MSW and OS X + versions but not when using Cairo. + */ + virtual wxGraphicsBitmap CreateSubBitmap(const wxGraphicsBitmap& bitmap, + wxDouble x, wxDouble y, + wxDouble w, wxDouble h) = 0; /** Creates a native brush from a wxBrush. */ - wxGraphicsBrush CreateBrush(const wxBrush& brush) const; + virtual wxGraphicsBrush CreateBrush(const wxBrush& brush) const; /** Creates a native graphics font from a wxFont and a text colour. */ - wxGraphicsFont CreateFont(const wxFont& font, - const wxColour& col = wxBLACK) const; + virtual wxGraphicsFont CreateFont(const wxFont& font, + const wxColour& col = *wxBLACK) const; + + /** + Creates a font object with the specified attributes. + + The use of overload taking wxFont is preferred, see + wxGraphicsRenderer::CreateFont() for more details. + + @since 2.9.3 + */ + virtual wxGraphicsFont CreateFont(double sizeInPixels, + const wxString& facename, + int flags = wxFONTFLAG_DEFAULT, + const wxColour& col = *wxBLACK) const; /** - Creates a wxGraphicsContext from a native context. This native context must be - eg a CGContextRef for Core Graphics, a Graphics pointer for GDIPlus or a - cairo_t pointer for cairo. + Creates a wxGraphicsContext from a native context. This native context + must be a CGContextRef for Core Graphics, a Graphics pointer for + GDIPlus, or a cairo_t pointer for cairo. - @see wxGraphicsRenderer:: CreateContextFromNativeContext + @see wxGraphicsRenderer::CreateContextFromNativeContext() */ - wxGraphicsContext* CreateFromNative(void* context); + static wxGraphicsContext* CreateFromNative(void* context); /** Creates a wxGraphicsContext from a native window. - @see wxGraphicsRenderer:: CreateContextFromNativeWindow + @see wxGraphicsRenderer::CreateContextFromNativeWindow() */ - wxGraphicsContext* CreateFromNativeWindow(void* window); + static wxGraphicsContext* CreateFromNativeWindow(void* window); /** - Creates a native brush, having a linear gradient, starting at (x1,y1) with - color c1 to (x2,y2) with color c2 + Creates a native brush with a linear gradient. + + The brush starts at (@a x1, @a y1) and ends at (@a x2, @a y2). Either + just the start and end gradient colours (@a c1 and @a c2) or full set + of gradient @a stops can be specified. + + The version taking wxGraphicsGradientStops is new in wxWidgets 2.9.1. */ - wxGraphicsBrush CreateLinearGradientBrush(wxDouble x1, - wxDouble y1, - wxDouble x2, - wxDouble y2, - const wxColouramp;c1, - const wxColouramp;c2) const; + //@{ + wxGraphicsBrush + CreateLinearGradientBrush(wxDouble x1, wxDouble y1, + wxDouble x2, wxDouble y2, + const wxColour& c1, const wxColour& c2) const; + + wxGraphicsBrush + CreateLinearGradientBrush(wxDouble x1, wxDouble y1, + wxDouble x2, wxDouble y2, + const wxGraphicsGradientStops& stops) const; + //@} /** - Creates a native affine transformation matrix from the passed in values. The - defaults result in an identity matrix. + Creates a native affine transformation matrix from the passed in + values. The default parameters result in an identity matrix. + */ + virtual wxGraphicsMatrix CreateMatrix(wxDouble a = 1.0, wxDouble b = 0.0, + wxDouble c = 0.0, wxDouble d = 1.0, + wxDouble tx = 0.0, + wxDouble ty = 0.0) const; + + /** + Creates a native affine transformation matrix from the passed + generic one. + + @since 2.9.4 */ - wxGraphicsMatrix CreateMatrix(wxDouble a = 1.0, wxDouble b = 0.0, - wxDouble c = 0.0, - wxDouble d = 1.0, - wxDouble tx = 0.0, - wxDouble ty = 0.0) const; + wxGraphicsMatrix CreateMatrix(const wxAffineMatrix2DBase& mat) const; /** Creates a native graphics path which is initially empty. @@ -333,193 +536,443 @@ public: /** Creates a native pen from a wxPen. */ - wxGraphicsPen CreatePen(const wxPen& pen) const; + virtual wxGraphicsPen CreatePen(const wxPen& pen) const; /** - Creates a native brush, having a radial gradient originating at (xo,yc) with - color oColour and ends on a circle around (xc,yc) with radius r and color cColour + Creates a native brush with a radial gradient. + + The brush originates at (@a xo, @a yc) and ends on a circle around + (@a xc, @a yc) with the given @a radius. + + The gradient may be specified either by its start and end colours @a + oColor and @a cColor or by a full set of gradient @a stops. + + The version taking wxGraphicsGradientStops is new in wxWidgets 2.9.1. */ - wxGraphicsBrush CreateRadialGradientBrush(wxDouble xo, - wxDouble yo, - wxDouble xc, - wxDouble yc, - wxDouble radius, - const wxColour& oColor, - const wxColour& cColor) const; + //@{ + virtual wxGraphicsBrush + CreateRadialGradientBrush(wxDouble xo, wxDouble yo, + wxDouble xc, wxDouble yc, + wxDouble radius, + const wxColour& oColor, + const wxColour& cColor) const; + + virtual wxGraphicsBrush + CreateRadialGradientBrush(wxDouble xo, wxDouble yo, + wxDouble xc, wxDouble yc, + wxDouble radius, + const wxGraphicsGradientStops& stops) = 0; + //@} /** - Draws the bitmap. In case of a mono bitmap, this is treated as a mask and the - current brushed is used for filling. + Draws the bitmap. In case of a mono bitmap, this is treated as a mask + and the current brushed is used for filling. */ - void DrawBitmap(const wxBitmap& bmp, wxDouble x, wxDouble y, - wxDouble w, wxDouble h); + //@{ + virtual void DrawBitmap(const wxGraphicsBitmap& bmp, + wxDouble x, wxDouble y, + wxDouble w, wxDouble h ) = 0; + virtual void DrawBitmap(const wxBitmap& bmp, + wxDouble x, wxDouble y, + wxDouble w, wxDouble h) = 0; + //@} /** Draws an ellipse. */ - void DrawEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h); + virtual void DrawEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h); /** Draws the icon. */ - void DrawIcon(const wxIcon& icon, wxDouble x, wxDouble y, - wxDouble w, wxDouble h); + virtual void DrawIcon(const wxIcon& icon, wxDouble x, wxDouble y, + wxDouble w, wxDouble h) = 0; /** Draws a polygon. */ - void DrawLines(size_t n, const wxPoint2DDouble* points, - int fillStyle = wxODDEVEN_RULE); + virtual void DrawLines(size_t n, const wxPoint2DDouble* points, + wxPolygonFillMode fillStyle = wxODDEVEN_RULE); /** Draws the path by first filling and then stroking. */ - void DrawPath(const wxGraphicsPath& path, - int fillStyle = wxODDEVEN_RULE); + virtual void DrawPath(const wxGraphicsPath& path, + wxPolygonFillMode fillStyle = wxODDEVEN_RULE); /** Draws a rectangle. */ - void DrawRectangle(wxDouble x, wxDouble y, wxDouble w, - wxDouble h); + virtual void DrawRectangle(wxDouble x, wxDouble y, wxDouble w, wxDouble h); /** Draws a rounded rectangle. */ - void DrawRoundedRectangle(wxDouble x, wxDouble y, wxDouble w, - wxDouble h, - wxDouble radius); + virtual void DrawRoundedRectangle(wxDouble x, wxDouble y, wxDouble w, + wxDouble h, wxDouble radius); - //@{ /** - Draws a text at the defined position, at the given angle. + Draws text at the defined position. */ - void DrawText(const wxString& str, wxDouble x, wxDouble y, - wxDouble angle); void DrawText(const wxString& str, wxDouble x, wxDouble y); - //@} + /** + Draws text at the defined position. + + @param str + The text to draw. + @param x + The x coordinate position to draw the text at. + @param y + The y coordinate position to draw the text at. + @param angle + The angle relative to the (default) horizontal direction to draw + the string. + */ + void DrawText(const wxString& str, wxDouble x, wxDouble y, wxDouble angle); + /** + Draws text at the defined position. + + @param str + The text to draw. + @param x + The x coordinate position to draw the text at. + @param y + The y coordinate position to draw the text at. + @param backgroundBrush + Brush to fill the text with. + */ + void DrawText(const wxString& str, wxDouble x, wxDouble y, + const wxGraphicsBrush& backgroundBrush); + /** + Draws text at the defined position. + + @param str + The text to draw. + @param x + The x coordinate position to draw the text at. + @param y + The y coordinate position to draw the text at. + @param angle + The angle relative to the (default) horizontal direction to draw + the string. + @param backgroundBrush + Brush to fill the text with. + */ + void DrawText(const wxString& str, wxDouble x, wxDouble y, + wxDouble angle, const wxGraphicsBrush& backgroundBrush); /** Fills the path with the current brush. */ - void FillPath(const wxGraphicsPath& path, - int fillStyle = wxODDEVEN_RULE); + virtual void FillPath(const wxGraphicsPath& path, + wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0; /** - Returns the native context (CGContextRef for Core Graphics, Graphics pointer - for GDIPlus and cairo_t pointer for cairo). + Returns the native context (CGContextRef for Core Graphics, Graphics + pointer for GDIPlus and cairo_t pointer for cairo). */ - void* GetNativeContext(); + virtual void* GetNativeContext() = 0; /** Fills the @a widths array with the widths from the beginning of - @a text to the corresponding character of @e text. + @a text to the corresponding character of @a text. */ - void GetPartialTextExtents(const wxString& text, - wxArrayDouble& widths) const; + virtual void GetPartialTextExtents(const wxString& text, + wxArrayDouble& widths) const = 0; /** Gets the dimensions of the string using the currently selected font. - @e string is the text string to measure, @e w and @e h are - the total width and height respectively, @a descent is the - dimension from the baseline of the font to the bottom of the - descender, and @a externalLeading is any extra vertical space added - to the font by the font designer (usually is zero). + + @param text + The text string to measure. + @param width + Variable to store the total calculated width of the text. + @param height + Variable to store the total calculated height of the text. + @param descent + Variable to store the dimension from the baseline of the font to + the bottom of the descender. + @param externalLeading + Any extra vertical space added to the font by the font designer + (usually is zero). */ - void GetTextExtent(const wxString& text, wxDouble* width, - wxDouble* height, - wxDouble* descent, - wxDouble* externalLeading) const; + virtual void GetTextExtent(const wxString& text, wxDouble* width, + wxDouble* height, wxDouble* descent, + wxDouble* externalLeading) const = 0; /** Gets the current transformation matrix of this context. */ - wxGraphicsMatrix GetTransform() const; + virtual wxGraphicsMatrix GetTransform() const = 0; /** Resets the clipping to original shape. */ - void ResetClip(); + virtual void ResetClip() = 0; /** - Rotates the current transformation matrix (radians), + Rotates the current transformation matrix (in radians). */ - void Rotate(wxDouble angle); + virtual void Rotate(wxDouble angle) = 0; /** Scales the current transformation matrix. */ - void Scale(wxDouble xScale, wxDouble yScale); + virtual void Scale(wxDouble xScale, wxDouble yScale) = 0; - //@{ /** Sets the brush for filling paths. */ void SetBrush(const wxBrush& brush); - void SetBrush(const wxGraphicsBrush& brush); - //@} + /** + Sets the brush for filling paths. + */ + virtual void SetBrush(const wxGraphicsBrush& brush); - //@{ /** Sets the font for drawing text. */ void SetFont(const wxFont& font, const wxColour& colour); - void SetFont(const wxGraphicsFont& font); - //@} + /** + Sets the font for drawing text. + */ + virtual void SetFont(const wxGraphicsFont& font); - //@{ /** Sets the pen used for stroking. */ - void SetPen(const wxGraphicsPen& pen); void SetPen(const wxPen& pen); - //@} + /** + Sets the pen used for stroking. + */ + virtual void SetPen(const wxGraphicsPen& pen); /** Sets the current transformation matrix of this context */ - void SetTransform(const wxGraphicsMatrix& matrix); + virtual void SetTransform(const wxGraphicsMatrix& matrix) = 0; /** Strokes a single line. */ - void StrokeLine(wxDouble x1, wxDouble y1, wxDouble x2, - wxDouble y2); + virtual void StrokeLine(wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2); - //@{ /** - Stroke disconnected lines from begin to end points, fastest method available - for this purpose. + Stroke disconnected lines from begin to end points, fastest method + available for this purpose. */ - void StrokeLines(size_t n, const wxPoint2DDouble* beginPoints, - const wxPoint2DDouble* endPoints); - void StrokeLines(size_t n, const wxPoint2DDouble* points); - //@} + virtual void StrokeLines(size_t n, const wxPoint2DDouble* beginPoints, + const wxPoint2DDouble* endPoints); + /** + Stroke lines connecting all the points. + + Unlike the other overload of this function, this method draws a single + polyline and not a number of disconnected lines. + */ + virtual void StrokeLines(size_t n, const wxPoint2DDouble* points); /** Strokes along a path with the current pen. */ - void StrokePath(const wxGraphicsPath& path); + virtual void StrokePath(const wxGraphicsPath& path) = 0; /** Translates the current transformation matrix. */ - void Translate(wxDouble dx, wxDouble dy); + virtual void Translate(wxDouble dx, wxDouble dy) = 0; + + /** + Redirects all rendering is done into a fully transparent temporary context + */ + virtual void BeginLayer(wxDouble opacity) = 0; + + /** + Composites back the drawings into the context with the opacity given at + the BeginLayer call + */ + virtual void EndLayer() = 0; + + /** + Sets the antialiasing mode, returns true if it supported + */ + virtual bool SetAntialiasMode(wxAntialiasMode antialias) = 0; + + /** + Returns the current shape antialiasing mode + */ + virtual wxAntialiasMode GetAntialiasMode() const ; + + /** + Sets the interpolation quality, returns true if it is supported. + + Not implemented in Cairo backend currently. + */ + virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation) = 0; + + /** + Returns the current interpolation quality. + */ + virtual wxInterpolationQuality GetInterpolationQuality() const; + + /** + Sets the compositing operator, returns true if it supported + */ + virtual bool SetCompositionMode(wxCompositionMode op) = 0; + + /** + Returns the current compositing operator + */ + virtual wxCompositionMode GetCompositionMode() const; + + + /** + Push the current state of the context's transformation matrix on a + stack. + + @see wxGraphicsContext::PopState + */ + virtual void PushState() = 0; + + /** + Pops a stored state from the stack and sets the current transformation + matrix to that state. + + @see wxGraphicsContext::PopState + */ + virtual void PopState() = 0; + + + virtual void EnableOffset(bool enable = true); + void DisableOffset(); + bool OffsetEnabled(); + }; +/** + Represents a single gradient stop in a collection of gradient stops as + represented by wxGraphicsGradientStops. + @library{wxcore} + @category{gdi} + + @since 2.9.1 +*/ +class wxGraphicsGradientStop +{ +public: + /** + Creates a stop with the given colour and position. + + @param col The colour of this stop. Note that the alpha component of + the colour is honoured thus allowing the background colours to + partially show through the gradient. + @param pos The stop position, must be in [0, 1] range with 0 being the + beginning and 1 the end of the gradient. + */ + wxGraphicsGradientStop(wxColour col = wxTransparentColour, float pos = 0.); + + /// Return the stop colour. + const wxColour& GetColour() const; + + /** + Change the stop colour. + + @param col The new colour. + */ + void SetColour(const wxColour& col); + + /// Return the stop position. + float GetPosition() const; + + /** + Change the stop position. + + @param pos The new position, must always be in [0, 1] range. + */ + void SetPosition(float pos); +}; + +/** + Represents a collection of wxGraphicGradientStop values for use with + CreateLinearGradientBrush and CreateRadialGradientBrush. + + The stops are maintained in order of position. If two or more stops are + added with the same position then the one(s) added later come later. + This can be useful for producing discontinuities in the colour gradient. + + Notice that this class is write-once, you can't modify the stops once they + had been added. + + @library{wxcore} + @category{gdi} + + @since 2.9.1 +*/ +class wxGraphicsGradientStops +{ +public: + /** + Initializes the gradient stops with the given boundary colours. + + Creates a wxGraphicsGradientStops instance with start colour given + by @a startCol and end colour given by @a endCol. + */ + wxGraphicsGradientStops(wxColour startCol = wxTransparentColour, + wxColour endCol = wxTransparentColour); + + /** + Add a new stop. + */ + //@{ + void Add(const wxGraphicsGradientStop& stop); + void Add(wxColour col, float pos); + //@} + + /** + Returns the stop at the given index. + + @param n The index, must be in [0, GetCount()) range. + */ + wxGraphicsGradientStop Item(unsigned n) const; + + /** + Returns the number of stops. + */ + unsigned GetCount() const; + + /** + Set the start colour to @a col + */ + void SetStartColour(wxColour col); + + /** + Returns the start colour. + */ + wxColour GetStartColour() const; + + /** + Set the end colour to @a col + */ + void SetEndColour(wxColour col); + + /** + Returns the end colour. + */ + wxColour GetEndColour() const; +}; /** @class wxGraphicsRenderer A wxGraphicsRenderer is the instance corresponding to the rendering engine used. There may be multiple instances on a system, if there are different - rendering engines present, but there is always only one instance per engine. - This instance is pointed back to by all objects created by it (wxGraphicsContext, - wxGraphicsPath etc) and can be retrieved through their wxGraphicsObject::GetRenderer() - method. Therefore you can create an additional instance of a path etc. by calling - wxGraphicsObject::GetRenderer() and then using the appropriate CreateXXX function - of that renderer. + rendering engines present, but there is always only one instance per + engine. This instance is pointed back to by all objects created by it + (wxGraphicsContext, wxGraphicsPath etc) and can be retrieved through their + wxGraphicsObject::GetRenderer() method. Therefore you can create an + additional instance of a path etc. by calling + wxGraphicsObject::GetRenderer() and then using the appropriate CreateXXX() + function of that renderer. @code wxGraphicsPath *path = // from somewhere @@ -527,103 +980,203 @@ public: @endcode @library{wxcore} - @category{FIXME} + @category{gdi} */ class wxGraphicsRenderer : public wxObject { public: + /** + Creates wxGraphicsBitmap from an existing wxBitmap. + + Returns an invalid wxNullGraphicsBitmap on failure. + */ + virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0; + + /** + Creates wxGraphicsBitmap from an existing wxImage. + + This method is more efficient than converting wxImage to wxBitmap first + and then calling CreateBitmap() but otherwise has the same effect. + + Returns an invalid wxNullGraphicsBitmap on failure. + + @since 2.9.3 + */ + virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image) = 0; + + /** + Creates a wxImage from a wxGraphicsBitmap. + + This method is used by the more convenient wxGraphicsBitmap::ConvertToImage. + */ + virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp) = 0; + + /** + Creates wxGraphicsBitmap from a native bitmap handle. + + @a bitmap meaning is platform-dependent. Currently it's a GDI+ @c + Bitmap pointer under MSW, @c CGImage pointer under OS X or a @c + cairo_surface_t pointer when using Cairo under any platform. + */ + virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap ) = 0; + /** Creates a wxGraphicsContext from a wxWindow. */ virtual wxGraphicsContext* CreateContext(wxWindow* window) = 0; - + /** Creates a wxGraphicsContext from a wxWindowDC */ - virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ; - + virtual wxGraphicsContext* CreateContext(const wxWindowDC& windowDC) = 0 ; + /** Creates a wxGraphicsContext from a wxMemoryDC */ - virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0 ; - + virtual wxGraphicsContext* CreateContext(const wxMemoryDC& memoryDC) = 0 ; + /** Creates a wxGraphicsContext from a wxPrinterDC */ - virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc) = 0 ; + virtual wxGraphicsContext* CreateContext(const wxPrinterDC& printerDC) = 0 ; /** - Creates a native brush from a wxBrush. + Creates a wxGraphicsContext from a wxEnhMetaFileDC. + + This function, as wxEnhMetaFileDC class itself, is only available only + under MSW. */ - wxGraphicsBrush CreateBrush(const wxBrush& brush); + virtual wxGraphicsContext* CreateContext(const wxEnhMetaFileDC& metaFileDC) = 0; + + /** + Creates a wxGraphicsContext associated with a wxImage. + This function is used by wxContext::CreateFromImage() and is not + normally called directly. + + @since 2.9.3 + */ + wxGraphicsContext* CreateContextFromImage(wxImage& image); + + /** + Creates a native brush from a wxBrush. + */ + virtual wxGraphicsBrush CreateBrush(const wxBrush& brush) = 0; /** - Creates a wxGraphicsContext from a native context. This native context must be - eg a CGContextRef for Core Graphics, a Graphics pointer for GDIPlus or a cairo_t - pointer for cairo. + Creates a wxGraphicsContext from a native context. This native context + must be a CGContextRef for Core Graphics, a Graphics pointer for + GDIPlus, or a cairo_t pointer for cairo. */ - wxGraphicsContext* CreateContextFromNativeContext(void* context); + virtual wxGraphicsContext* CreateContextFromNativeContext(void* context) = 0; /** Creates a wxGraphicsContext from a native window. */ - wxGraphicsContext* CreateContextFromNativeWindow(void* window); + virtual wxGraphicsContext* CreateContextFromNativeWindow(void* window) = 0; + + /** + Creates a wxGraphicsContext that can be used for measuring texts only. + No drawing commands are allowed. + */ + virtual wxGraphicsContext * CreateMeasuringContext() = 0; /** Creates a native graphics font from a wxFont and a text colour. */ - wxGraphicsFont CreateFont(const wxFont& font, - const wxColour& col = wxBLACK); + virtual wxGraphicsFont CreateFont(const wxFont& font, + const wxColour& col = *wxBLACK) = 0; /** - Creates a native brush, having a linear gradient, starting at (x1,y1) with - color c1 to (x2,y2) with color c2 + Creates a graphics font with the given characteristics. + + If possible, the CreateFont() overload taking wxFont should be used + instead. The main advantage of this overload is that it can be used + without X server connection under Unix when using Cairo. + + @param sizeInPixels + Height of the font in user space units, i.e. normally pixels. + Notice that this is different from the overload taking wxFont as + wxFont size is specified in points. + @param facename + The name of the font. The same font name might not be available + under all platforms so the font name can also be empty to use the + default platform font. + @param flags + Combination of wxFontFlag enum elements. Currently only + @c wxFONTFLAG_ITALIC and @c wxFONTFLAG_BOLD are supported. By + default the normal font version is used. + @param col + The font colour, black by default. + + @since 2.9.3 + */ + virtual wxGraphicsFont CreateFont(double sizeInPixels, + const wxString& facename, + int flags = wxFONTFLAG_DEFAULT, + const wxColour& col = *wxBLACK) = 0; + + + /** + Creates a native brush with a linear gradient. + + Stops support is new since wxWidgets 2.9.1, previously only the start + and end colours could be specified. */ - wxGraphicsBrush CreateLinearGradientBrush(wxDouble x1, - wxDouble y1, - wxDouble x2, - wxDouble y2, - const wxColouramp;c1, - const wxColouramp;c2); + virtual wxGraphicsBrush CreateLinearGradientBrush(wxDouble x1, + wxDouble y1, + wxDouble x2, + wxDouble y2, + const wxGraphicsGradientStops& stops) = 0; /** - Creates a native affine transformation matrix from the passed in values. The - defaults result in an identity matrix. + Creates a native affine transformation matrix from the passed in + values. The defaults result in an identity matrix. */ - wxGraphicsMatrix CreateMatrix(wxDouble a = 1.0, wxDouble b = 0.0, - wxDouble c = 0.0, - wxDouble d = 1.0, - wxDouble tx = 0.0, - wxDouble ty = 0.0); + virtual wxGraphicsMatrix CreateMatrix(wxDouble a = 1.0, wxDouble b = 0.0, + wxDouble c = 0.0, wxDouble d = 1.0, + wxDouble tx = 0.0, + wxDouble ty = 0.0) = 0; /** Creates a native graphics path which is initially empty. */ - wxGraphicsPath CreatePath(); + virtual wxGraphicsPath CreatePath() = 0; /** Creates a native pen from a wxPen. */ - wxGraphicsPen CreatePen(const wxPen& pen); + virtual wxGraphicsPen CreatePen(const wxPen& pen) = 0; /** - Creates a native brush, having a radial gradient originating at (xo,yc) with - color oColour and ends on a circle around (xc,yc) with radius r and color cColour + Creates a native brush with a radial gradient. + + Stops support is new since wxWidgets 2.9.1, previously only the start + and end colours could be specified. */ - wxGraphicsBrush CreateRadialGradientBrush(wxDouble xo, - wxDouble yo, - wxDouble xc, - wxDouble yc, - wxDouble radius, - const wxColour& oColour, - const wxColour& cColour); + virtual wxGraphicsBrush CreateRadialGradientBrush(wxDouble xo, wxDouble yo, + wxDouble xc, wxDouble yc, + wxDouble radius, + const wxGraphicsGradientStops& stops) = 0; + + /** + Extracts a sub-bitmap from an existing bitmap. + + Currently this function is implemented in the native MSW and OS X + versions but not when using Cairo. + */ + virtual wxGraphicsBitmap CreateSubBitmap(const wxGraphicsBitmap& bitmap, + wxDouble x, wxDouble y, + wxDouble w, wxDouble h) = 0; /** Returns the default renderer on this platform. On OS X this is the Core - Graphics (a.k.a. Quartz 2D) renderer, on MSW the GDIPlus renderer, and on GTK we currently default to the cairo renderer. + Graphics (a.k.a. Quartz 2D) renderer, on MSW the GDIPlus renderer, and + on GTK we currently default to the cairo renderer. */ static wxGraphicsRenderer* GetDefaultRenderer(); + static wxGraphicsRenderer* GetCairoRenderer(); + }; @@ -631,13 +1184,14 @@ public: /** @class wxGraphicsBrush - A wxGraphicsBrush is a native representation of a brush. The contents - are specific and private to the respective renderer. Instances are ref counted and can - therefore be assigned as usual. The only way to get a valid instance is via - wxGraphicsContext::CreateBrush or wxGraphicsRenderer::CreateBrush. + A wxGraphicsBrush is a native representation of a brush. The contents are + specific and private to the respective renderer. Instances are ref counted + and can therefore be assigned as usual. The only way to get a valid + instance is via wxGraphicsContext::CreateBrush() or + wxGraphicsRenderer::CreateBrush(). @library{wxcore} - @category{FIXME} + @category{gdi} */ class wxGraphicsBrush : public wxGraphicsObject { @@ -650,13 +1204,14 @@ public: /** @class wxGraphicsFont - A wxGraphicsFont is a native representation of a font. The contents - are specific and private to the respective renderer. Instances are ref counted and can - therefore be assigned as usual. The only way to get a valid instance is via - wxGraphicsContext::CreateFont or wxGraphicsRenderer::CreateFont. + A wxGraphicsFont is a native representation of a font. The contents are + specific and private to the respective renderer. Instances are ref counted + and can therefore be assigned as usual. The only way to get a valid + instance is via wxGraphicsContext::CreateFont() or + wxGraphicsRenderer::CreateFont(). @library{wxcore} - @category{FIXME} + @category{gdi} */ class wxGraphicsFont : public wxGraphicsObject { @@ -669,13 +1224,14 @@ public: /** @class wxGraphicsPen - A wxGraphicsPen is a native representation of a pen. The contents - are specific and private to the respective renderer. Instances are ref counted and can - therefore be assigned as usual. The only way to get a valid instance is via - wxGraphicsContext::CreatePen or wxGraphicsRenderer::CreatePen. + A wxGraphicsPen is a native representation of a pen. The contents are + specific and private to the respective renderer. Instances are ref counted + and can therefore be assigned as usual. The only way to get a valid + instance is via wxGraphicsContext::CreatePen() or + wxGraphicsRenderer::CreatePen(). @library{wxcore} - @category{FIXME} + @category{gdi} */ class wxGraphicsPen : public wxGraphicsObject { @@ -688,43 +1244,50 @@ public: /** @class wxGraphicsMatrix - A wxGraphicsMatrix is a native representation of an affine matrix. The contents - are specific and private to the respective renderer. Instances are ref counted and can - therefore be assigned as usual. The only way to get a valid instance is via - wxGraphicsContext::CreateMatrix or wxGraphicsRenderer::CreateMatrix. + A wxGraphicsMatrix is a native representation of an affine matrix. The + contents are specific and private to the respective renderer. Instances are + ref counted and can therefore be assigned as usual. The only way to get a + valid instance is via wxGraphicsContext::CreateMatrix() or + wxGraphicsRenderer::CreateMatrix(). @library{wxcore} - @category{FIXME} + @category{gdi} */ class wxGraphicsMatrix : public wxGraphicsObject { public: - //@{ /** - + Concatenates the matrix passed with the current matrix. + */ + virtual void Concat(const wxGraphicsMatrix* t); + /** + Concatenates the matrix passed with the current matrix. */ - void Concat(const wxGraphicsMatrix* t); void Concat(const wxGraphicsMatrix& t); - //@} /** Returns the component values of the matrix via the argument pointers. */ - void Get(wxDouble* a = NULL, wxDouble* b = NULL, wxDouble* c = NULL, - wxDouble* d = NULL, wxDouble* tx = NULL, - wxDouble* ty = NULL) const; + virtual void Get(wxDouble* a = NULL, wxDouble* b = NULL, + wxDouble* c = NULL, wxDouble* d = NULL, + wxDouble* tx = NULL, wxDouble* ty = NULL) const; /** - Returns the native representation of the matrix. For CoreGraphics this is a - CFAffineMatrix pointer. For GDIPlus a Matrix Pointer and for Cairo a cairo_matrix_t pointer. + Returns the native representation of the matrix. For CoreGraphics this + is a CFAffineMatrix pointer, for GDIPlus a Matrix Pointer, and for + Cairo a cairo_matrix_t pointer. */ - void* GetNativeMatrix() const; + virtual void* GetNativeMatrix() const; /** Inverts the matrix. */ - void Invert(); + virtual void Invert(); + /** + Returns @true if the elements of the transformation matrix are equal. + */ + virtual bool IsEqual(const wxGraphicsMatrix* t) const; /** Returns @true if the elements of the transformation matrix are equal. */ @@ -733,40 +1296,49 @@ public: /** Return @true if this is the identity matrix. */ - bool IsIdentity() const; + virtual bool IsIdentity() const; /** - Rotates this matrix (radians). + Rotates this matrix clockwise (in radians). + + @param radians + Rotation angle in radians, clockwise. */ - void Rotate(wxDouble angle); + virtual void Rotate(wxDouble angle); /** Scales this matrix. */ - void Scale(wxDouble xScale, wxDouble yScale); + virtual void Scale(wxDouble xScale, wxDouble yScale); /** - Sets the matrix to the respective values (default values are the identity - matrix) + Sets the matrix to the respective values (default values are the + identity matrix). */ - void Set(wxDouble a = 1.0, wxDouble b = 0.0, wxDouble c = 0.0, - wxDouble d = 1.0, wxDouble tx = 0.0, - wxDouble ty = 0.0); + virtual void Set(wxDouble a = 1.0, wxDouble b = 0.0, wxDouble c = 0.0, + wxDouble d = 1.0, wxDouble tx = 0.0, wxDouble ty = 0.0); /** Applies this matrix to a distance (ie. performs all transforms except - translations) + translations). */ - void TransformDistance(wxDouble* dx, wxDouble* dy) const; + virtual void TransformDistance(wxDouble* dx, wxDouble* dy) const; /** Applies this matrix to a point. */ - void TransformPoint(wxDouble* x, wxDouble* y) const; + virtual void TransformPoint(wxDouble* x, wxDouble* y) const; /** Translates this matrix. */ - void Translate(wxDouble dx, wxDouble dy); + virtual void Translate(wxDouble dx, wxDouble dy); }; + +const wxGraphicsPen wxNullGraphicsPen; +const wxGraphicsBrush wxNullGraphicsBrush; +const wxGraphicsFont wxNullGraphicsFont; +const wxGraphicsBitmap wxNullGraphicsBitmap; +const wxGraphicsMatrix wxNullGraphicsMatrix; +const wxGraphicsPath wxNullGraphicsPath;