/////////////////////////////////////////////////////////////////////////////
// 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 a
- CreatePath call on the graphics context or the renderer instance.
+ 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;
- //@}
+ /**
+ @return @true if the point is within the path.
+ */
+ virtual bool Contains(wxDouble x, wxDouble y,
+ int 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;
};
allows reference counting. Not instantiated by user code.
@library{wxcore}
- @category{FIXME}
+ @category{gdi}
@see wxGraphicsBrush, wxGraphicsPen, wxGraphicsMatrix, wxGraphicsPath
*/
{
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,
+};
+
+/**
+ 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
+{
+ 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 */
+};
/**
@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
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
*/
@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& dc);
+
/**
Creates a wxGraphicsContext from a wxMemoryDC
@see wxGraphicsRenderer::CreateContext()
*/
- static wxGraphicsContext * Create( const wxMemoryDC& dc) ;
-
+ static wxGraphicsContext* Create(const wxMemoryDC& dc);
+
/**
- 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 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 "Printing under Unix"
+ @see wxGraphicsRenderer::CreateContext(), @ref overview_unixprinting
*/
- static wxGraphicsContext * Create( const wxPrinterDC& dc) ;
+ static wxGraphicsContext* Create(const wxPrinterDC& dc);
/**
- 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 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 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.
*/
- 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;
+ 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 graphics path which is initially empty.
/**
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 originats 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 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 disconnected lines from begin to end points, fastest method
+ available for this purpose.
+ */
+ 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 compositing operator, returns true if it supported
+ */
+ virtual bool SetCompositionMode(wxCompositionMode op) = 0;
+
+ /**
+ Returns the current compositing operator
+ */
+ virtual wxCompositionMode GetCompositionMode() const;
+
+};
+
+/**
+ 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
@endcode
@library{wxcore}
- @category{FIXME}
+ @category{gdi}
*/
class wxGraphicsRenderer : public wxObject
{
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& dc) = 0 ;
+
/**
Creates a wxGraphicsContext from a wxMemoryDC
*/
- virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0 ;
-
+ virtual wxGraphicsContext* CreateContext(const wxMemoryDC& dc) = 0 ;
+
/**
Creates a wxGraphicsContext from a wxPrinterDC
*/
- virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc) = 0 ;
+ virtual wxGraphicsContext* CreateContext(const wxPrinterDC& dc) = 0 ;
/**
Creates a native brush from a wxBrush.
*/
- wxGraphicsBrush CreateBrush(const wxBrush& brush);
-
+ 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 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;
/**
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();
};
/**
@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().
@library{wxcore}
- @category{FIXME}
+ @category{gdi}
*/
class wxGraphicsBrush : public wxGraphicsObject
{
/**
@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().
@library{wxcore}
- @category{FIXME}
+ @category{gdi}
*/
class wxGraphicsFont : public wxGraphicsObject
{
/**
@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().
@library{wxcore}
- @category{FIXME}
+ @category{gdi}
*/
class wxGraphicsPen : public wxGraphicsObject
{
/**
@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 a CreateMatrix call on the graphics context or the renderer instance.
+ 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.
*/
/**
Return @true if this is the identity matrix.
*/
- bool IsIdentity() const;
+ virtual bool IsIdentity() const;
/**
- Rotates this matrix (radians).
+ Rotates this matrix (in radians).
*/
- 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);
};
projects / wxWidgets.git / blobdiff