3c419e8111
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50798 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
569 lines
19 KiB
C++
569 lines
19 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/graphics.h
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// Purpose: graphics context header
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// Author: Stefan Csomor
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// Modified by:
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// Created:
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// Copyright: (c) Stefan Csomor
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// RCS-ID: $Id$
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_GRAPHICS_H_
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#define _WX_GRAPHICS_H_
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#include "wx/defs.h"
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#if wxUSE_GRAPHICS_CONTEXT
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#include "wx/geometry.h"
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#include "wx/dynarray.h"
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class WXDLLIMPEXP_FWD_CORE wxWindowDC;
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class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsPath;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrix;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsFigure;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsRenderer;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsPen;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsBrush;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsFont;
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/*
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* notes about the graphics context apis
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*
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* angles : are measured in radians, 0.0 being in direction of positiv x axis, PI/2 being
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* in direction of positive y axis.
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*/
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// Base class of all objects used for drawing in the new graphics API, the always point back to their
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// originating rendering engine, there is no dynamic unloading of a renderer currently allowed,
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// these references are not counted
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//
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// The data used by objects like graphics pens etc is ref counted, in order to avoid unnecessary expensive
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// duplication. Any operation on a shared instance that results in a modified state, uncouples this
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// instance from the other instances that were shared - using copy on write semantics
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//
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class WXDLLIMPEXP_FWD_CORE wxGraphicsObjectRefData;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrixData;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsPathData;
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class WXDLLIMPEXP_CORE wxGraphicsObject : public wxObject
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{
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public :
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wxGraphicsObject() ;
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wxGraphicsObject( wxGraphicsRenderer* renderer ) ;
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virtual ~wxGraphicsObject() ;
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bool IsNull() const ;
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// returns the renderer that was used to create this instance, or NULL if it has not been initialized yet
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wxGraphicsRenderer* GetRenderer() const ;
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wxGraphicsObjectRefData* GetGraphicsData() const ;
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protected :
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virtual wxObjectRefData* CreateRefData() const;
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virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
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DECLARE_DYNAMIC_CLASS(wxGraphicsObject)
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} ;
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class WXDLLIMPEXP_CORE wxGraphicsPen : public wxGraphicsObject
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{
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public :
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wxGraphicsPen() {}
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virtual ~wxGraphicsPen() {}
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private :
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DECLARE_DYNAMIC_CLASS(wxGraphicsPen)
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} ;
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extern WXDLLEXPORT_DATA(wxGraphicsPen) wxNullGraphicsPen;
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class WXDLLIMPEXP_CORE wxGraphicsBrush : public wxGraphicsObject
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{
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public :
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wxGraphicsBrush() {}
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virtual ~wxGraphicsBrush() {}
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private :
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DECLARE_DYNAMIC_CLASS(wxGraphicsBrush)
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} ;
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extern WXDLLEXPORT_DATA(wxGraphicsBrush) wxNullGraphicsBrush;
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class WXDLLIMPEXP_CORE wxGraphicsFont : public wxGraphicsObject
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{
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public :
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wxGraphicsFont() {}
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virtual ~wxGraphicsFont() {}
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private :
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DECLARE_DYNAMIC_CLASS(wxGraphicsFont)
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} ;
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extern WXDLLEXPORT_DATA(wxGraphicsFont) wxNullGraphicsFont;
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class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
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{
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public :
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wxGraphicsMatrix() {}
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virtual ~wxGraphicsMatrix() {}
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// concatenates the matrix
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virtual void Concat( const wxGraphicsMatrix *t );
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void Concat( const wxGraphicsMatrix &t ) { Concat( &t ); }
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// sets the matrix to the respective values
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virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
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wxDouble tx=0.0, wxDouble ty=0.0);
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// gets the component valuess of the matrix
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virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL, wxDouble* c=NULL,
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wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
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// makes this the inverse matrix
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virtual void Invert();
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// returns true if the elements of the transformation matrix are equal ?
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virtual bool IsEqual( const wxGraphicsMatrix* t) const;
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bool IsEqual( const wxGraphicsMatrix& t) const { return IsEqual( &t ); }
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// return true if this is the identity matrix
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virtual bool IsIdentity() const;
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//
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// transformation
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//
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// add the translation to this matrix
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virtual void Translate( wxDouble dx , wxDouble dy );
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// add the scale to this matrix
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virtual void Scale( wxDouble xScale , wxDouble yScale );
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// add the rotation to this matrix (radians)
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virtual void Rotate( wxDouble angle );
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//
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// apply the transforms
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//
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// applies that matrix to the point
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virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
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// applies the matrix except for translations
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virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
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// returns the native representation
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virtual void * GetNativeMatrix() const;
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const wxGraphicsMatrixData* GetMatrixData() const
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{ return (const wxGraphicsMatrixData*) GetRefData(); }
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wxGraphicsMatrixData* GetMatrixData()
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{ return (wxGraphicsMatrixData*) GetRefData(); }
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private :
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DECLARE_DYNAMIC_CLASS(wxGraphicsMatrix)
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} ;
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extern WXDLLEXPORT_DATA(wxGraphicsMatrix) wxNullGraphicsMatrix;
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class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
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{
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public :
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wxGraphicsPath() {}
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virtual ~wxGraphicsPath() {}
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//
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// These are the path primitives from which everything else can be constructed
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//
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// begins a new subpath at (x,y)
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virtual void MoveToPoint( wxDouble x, wxDouble y );
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void MoveToPoint( const wxPoint2DDouble& p);
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// adds a straight line from the current point to (x,y)
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virtual void AddLineToPoint( wxDouble x, wxDouble y );
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void AddLineToPoint( const wxPoint2DDouble& p);
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// adds a cubic Bezier curve from the current point, using two control points and an end point
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virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) ;
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void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);
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// adds another path
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virtual void AddPath( const wxGraphicsPath& path );
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// closes the current sub-path
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virtual void CloseSubpath() ;
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// gets the last point of the current path, (0,0) if not yet set
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virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
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wxPoint2DDouble GetCurrentPoint() const;
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// adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
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virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
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void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);
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//
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// These are convenience functions which - if not available natively will be assembled
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// using the primitives from above
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//
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// adds a quadratic Bezier curve from the current point, using a control point and an end point
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virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
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// appends a rectangle as a new closed subpath
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virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
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// appends an ellipsis as a new closed subpath fitting the passed rectangle
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virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
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// 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)
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virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
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// appends an ellipse
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virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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// appends a rounded rectangle
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virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
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// returns the native path
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virtual void * GetNativePath() const;
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// give the native path returned by GetNativePath() back (there might be some deallocations necessary)
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virtual void UnGetNativePath(void *p)const;
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// transforms each point of this path by the matrix
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virtual void Transform( const wxGraphicsMatrix& matrix );
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// gets the bounding box enclosing all points (possibly including control points)
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virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h)const;
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wxRect2DDouble GetBox()const;
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virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE)const;
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bool Contains( const wxPoint2DDouble& c, int fillStyle = wxODDEVEN_RULE)const;
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const wxGraphicsPathData* GetPathData() const
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{ return (const wxGraphicsPathData*) GetRefData(); }
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wxGraphicsPathData* GetPathData()
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{ return (wxGraphicsPathData*) GetRefData(); }
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private :
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DECLARE_DYNAMIC_CLASS(wxGraphicsPath)
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} ;
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extern WXDLLEXPORT_DATA(wxGraphicsPath) wxNullGraphicsPath;
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class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
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{
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public:
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wxGraphicsContext(wxGraphicsRenderer* renderer);
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virtual ~wxGraphicsContext();
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static wxGraphicsContext* Create( const wxWindowDC& dc) ;
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static wxGraphicsContext * Create( const wxMemoryDC& dc) ;
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static wxGraphicsContext* CreateFromNative( void * context ) ;
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static wxGraphicsContext* CreateFromNativeWindow( void * window ) ;
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static wxGraphicsContext* Create( wxWindow* window ) ;
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// create a context that can be used for measuring texts only, no drawing allowed
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static wxGraphicsContext * Create();
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// begin a new document (relevant only for printing / pdf etc) if there is a progress dialog, message will be shown
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virtual bool StartDoc( const wxString& message ) ;
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// done with that document (relevant only for printing / pdf etc)
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virtual void EndDoc();
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// opens a new page (relevant only for printing / pdf etc) with the given size in points
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// (if both are null the default page size will be used)
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virtual void StartPage( wxDouble width = 0, wxDouble height = 0 );
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// ends the current page (relevant only for printing / pdf etc)
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virtual void EndPage();
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// make sure that the current content of this context is immediately visible
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virtual void Flush();
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wxGraphicsPath CreatePath() const;
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virtual wxGraphicsPen CreatePen(const wxPen& pen) const;
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virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) const;
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// sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
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virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
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const wxColour&c1, const wxColour&c2) const;
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// sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
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// with radius r and color cColor
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virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
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const wxColour &oColor, const wxColour &cColor) const;
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// sets the font
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virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;
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// create a 'native' matrix corresponding to these values
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virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
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wxDouble tx=0.0, wxDouble ty=0.0) const;
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// push the current state of the context, ie the transformation matrix on a stack
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virtual void PushState() = 0;
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// pops a stored state from the stack
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virtual void PopState() = 0;
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// clips drawings to the region intersected with the current clipping region
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virtual void Clip( const wxRegion ®ion ) = 0;
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// clips drawings to the rect intersected with the current clipping region
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virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
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// resets the clipping to original extent
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virtual void ResetClip() = 0 ;
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// returns the native context
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virtual void * GetNativeContext() = 0;
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// returns the current logical function
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virtual int GetLogicalFunction() const { return m_logicalFunction; }
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// sets the current logical function, returns true if it supported
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virtual bool SetLogicalFunction(int function) ;
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// returns the size of the graphics context in device coordinates
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virtual void GetSize( wxDouble* width, wxDouble* height);
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// returns the resolution of the graphics context in device points per inch
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virtual void GetDPI( wxDouble* dpiX, wxDouble* dpiY);
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#if 0
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// sets the current alpha on this context
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virtual void SetAlpha( wxDouble alpha );
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// returns the alpha on this context
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virtual wxDouble GetAlpha() const;
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#endif
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//
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// transformation : changes the current transformation matrix CTM of the context
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//
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// translate
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virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
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// scale
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virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
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// rotate (radians)
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virtual void Rotate( wxDouble angle ) = 0;
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// concatenates this transform with the current transform of this context
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virtual void ConcatTransform( const wxGraphicsMatrix& matrix ) = 0;
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// sets the transform of this context
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virtual void SetTransform( const wxGraphicsMatrix& matrix ) = 0;
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// gets the matrix of this context
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virtual wxGraphicsMatrix GetTransform() const = 0;
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//
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// setting the paint
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//
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// sets the pen
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virtual void SetPen( const wxGraphicsPen& pen );
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void SetPen( const wxPen& pen );
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// sets the brush for filling
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virtual void SetBrush( const wxGraphicsBrush& brush );
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void SetBrush( const wxBrush& brush );
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// sets the font
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virtual void SetFont( const wxGraphicsFont& font );
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void SetFont( const wxFont& font, const wxColour& colour );
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// strokes along a path with the current pen
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virtual void StrokePath( const wxGraphicsPath& path ) = 0;
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// fills a path with the current brush
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virtual void FillPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE ) = 0;
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// draws a path by first filling and then stroking
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virtual void DrawPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE );
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//
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// text
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//
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virtual void DrawText( const wxString &str, wxDouble x, wxDouble y ) = 0;
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virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
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virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, const wxGraphicsBrush& backgroundBrush ) ;
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virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle, const wxGraphicsBrush& backgroundBrush );
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virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
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wxDouble *descent, wxDouble *externalLeading ) const = 0;
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virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const = 0;
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//
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// image support
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//
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virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
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virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
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//
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// convenience methods
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//
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// strokes a single line
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virtual void StrokeLine( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2);
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// stroke lines connecting each of the points
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virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
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// stroke disconnected lines from begin to end points
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virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints);
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// draws a polygon
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virtual void DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle = wxODDEVEN_RULE );
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// draws a polygon
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virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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// draws an ellipse
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virtual void DrawEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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// draws a rounded rectangle
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virtual void DrawRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
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// wrappers using wxPoint2DDouble TODO
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// helper to determine if a 0.5 offset should be applied for the drawing operation
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virtual bool ShouldOffset() const { return false; }
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protected :
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wxGraphicsPen m_pen;
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wxGraphicsBrush m_brush;
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wxGraphicsFont m_font;
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int m_logicalFunction;
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private :
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DECLARE_NO_COPY_CLASS(wxGraphicsContext)
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DECLARE_ABSTRACT_CLASS(wxGraphicsContext)
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};
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#if 0
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//
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// A graphics figure allows to cache path, pen etc creations, also will be a basis for layering/grouping elements
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//
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class WXDLLIMPEXP_CORE wxGraphicsFigure : public wxGraphicsObject
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{
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public :
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wxGraphicsFigure(wxGraphicsRenderer* renderer) ;
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virtual ~wxGraphicsFigure() ;
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void SetPath( wxGraphicsMatrix* matrix );
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void SetMatrix( wxGraphicsPath* path);
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// draws this object on the context
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virtual void Draw( wxGraphicsContext* cg );
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// returns the path of this object
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wxGraphicsPath* GetPath() { return m_path; }
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// returns the transformation matrix of this object, may be null if there is no transformation necessary
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wxGraphicsMatrix* GetMatrix() { return m_matrix; }
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private :
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wxGraphicsMatrix* m_matrix;
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wxGraphicsPath* m_path;
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DECLARE_DYNAMIC_CLASS(wxGraphicsFigure)
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} ;
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#endif
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//
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// The graphics renderer is the instance corresponding to the rendering engine used, eg there is ONE core graphics renderer
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// instance on OSX. This instance is pointed back to by all objects created by it. Therefore you can create eg additional
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// paths at any point from a given matrix etc.
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//
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class WXDLLIMPEXP_CORE wxGraphicsRenderer : public wxObject
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{
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public :
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wxGraphicsRenderer() {}
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virtual ~wxGraphicsRenderer() {}
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static wxGraphicsRenderer* GetDefaultRenderer();
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// Context
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virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ;
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virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0 ;
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virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
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virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window ) = 0;
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virtual wxGraphicsContext * CreateContext( wxWindow* window ) = 0;
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// create a context that can be used for measuring texts only, no drawing allowed
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virtual wxGraphicsContext * CreateMeasuringContext() = 0;
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// Path
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virtual wxGraphicsPath CreatePath() = 0;
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// Matrix
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virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
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wxDouble tx=0.0, wxDouble ty=0.0) = 0;
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// Paints
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virtual wxGraphicsPen CreatePen(const wxPen& pen) = 0 ;
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virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) = 0 ;
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// sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
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virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
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const wxColour&c1, const wxColour&c2) = 0;
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// sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
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// with radius r and color cColor
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virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
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const wxColour &oColor, const wxColour &cColor) = 0;
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// sets the font
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virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
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private :
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DECLARE_NO_COPY_CLASS(wxGraphicsRenderer)
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DECLARE_ABSTRACT_CLASS(wxGraphicsRenderer)
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} ;
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#endif
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#endif // _WX_GRAPHICS_H_
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