23d291c2d2
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56606 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
772 lines
23 KiB
Objective-C
772 lines
23 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: graphics.h
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// Purpose: interface of wxGraphicsPath
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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/**
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@class wxGraphicsPath
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A wxGraphicsPath is a native representation of a geometric path. The
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contents are specific an private to the respective renderer. Instances are
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reference counted and can therefore be assigned as usual. The only way to
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get a valid instance is by using wxGraphicsContext::CreatePath() or
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wxGraphicsRenderer::CreatePath().
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@library{wxcore}
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@category{gdi}
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*/
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class wxGraphicsPath : public wxGraphicsObject
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{
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public:
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/**
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Adds an arc of a circle centering at (@a x,@a y) with radius (@a r)
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from @a startAngle to @a endAngle.
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*/
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virtual void AddArc(wxDouble x, wxDouble y, wxDouble r,
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wxDouble startAngle, wxDouble endAngle,
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bool clockwise);
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/**
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Adds an arc of a circle centering at @a c with radius (@a r)
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from @a startAngle to @a endAngle.
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*/
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void AddArc(const wxPoint2DDouble& c, wxDouble r,
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wxDouble startAngle, wxDouble endAngle, bool clockwise);
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/**
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Appends a an arc to two tangents connecting (current) to (@a x1,@a y1)
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and (@a x1,@a y1) to (@a x2,@a y2), also a straight line from (current)
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to (@a x1,@a y1).
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*/
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virtual void AddArcToPoint(wxDouble x1, wxDouble y1, wxDouble x2,
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wxDouble y2, wxDouble r);
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/**
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Appends a circle around (@a x,@a y) with radius @a r as a new closed
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subpath.
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*/
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virtual void AddCircle(wxDouble x, wxDouble y, wxDouble r);
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/**
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Adds a cubic bezier curve from the current point, using two control
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points and an end point.
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*/
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void AddCurveToPoint(wxDouble cx1, wxDouble cy1,
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wxDouble cx2, wxDouble cy2,
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wxDouble x, wxDouble y);
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/**
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Adds a cubic bezier curve from the current point, using two control
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points and an end point.
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*/
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void AddCurveToPoint(const wxPoint2DDouble& c1,
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const wxPoint2DDouble& c2,
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const wxPoint2DDouble& e);
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/**
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Appends an ellipse fitting into the passed in rectangle.
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*/
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virtual void AddEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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/**
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Adds a straight line from the current point to (@a x,@a y).
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*/
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virtual void AddLineToPoint(wxDouble x, wxDouble y);
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/**
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Adds a straight line from the current point to @a p.
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*/
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void AddLineToPoint(const wxPoint2DDouble& p);
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/**
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Adds another path.
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*/
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virtual void AddPath(const wxGraphicsPath& path);
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/**
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Adds a quadratic bezier curve from the current point, using a control
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point and an end point.
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*/
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virtual void AddQuadCurveToPoint(wxDouble cx, wxDouble cy,
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wxDouble x, wxDouble y);
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/**
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Appends a rectangle as a new closed subpath.
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*/
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virtual void AddRectangle(wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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/**
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Appends a rounded rectangle as a new closed subpath.
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*/
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virtual void AddRoundedRectangle(wxDouble x, wxDouble y, wxDouble w,
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wxDouble h, wxDouble radius);
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/**
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Closes the current sub-path.
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*/
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virtual void CloseSubpath();
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/**
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@return @true if the point is within the path.
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*/
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bool Contains(const wxPoint2DDouble& c,
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int fillStyle = wxODDEVEN_RULE) const;
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/**
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@return @true if the point is within the path.
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*/
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virtual bool Contains(wxDouble x, wxDouble y,
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int fillStyle = wxODDEVEN_RULE) const;
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/**
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Gets the bounding box enclosing all points (possibly including control
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points).
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*/
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wxRect2DDouble GetBox() const;
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/**
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Gets the bounding box enclosing all points (possibly including control
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points).
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*/
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virtual void GetBox(wxDouble* x, wxDouble* y,
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wxDouble* w, wxDouble* h) const;
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/**
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Gets the last point of the current path, (0,0) if not yet set.
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*/
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virtual void GetCurrentPoint(wxDouble* x, wxDouble* y) const;
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/**
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Gets the last point of the current path, (0,0) if not yet set.
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*/
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wxPoint2DDouble GetCurrentPoint() const;
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/**
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Returns the native path (CGPathRef for Core Graphics, Path pointer for
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GDIPlus and a cairo_path_t pointer for cairo).
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*/
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virtual void* GetNativePath() const;
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/**
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Begins a new subpath at (@a x,@a y).
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*/
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virtual void MoveToPoint(wxDouble x, wxDouble y);
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/**
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Begins a new subpath at @a p.
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*/
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void MoveToPoint(const wxPoint2DDouble& p);
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/**
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Transforms each point of this path by the matrix.
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*/
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virtual void Transform(const wxGraphicsMatrix& matrix);
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/**
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Gives back the native path returned by GetNativePath() because there
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might be some deallocations necessary (e.g. on cairo the native path
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returned by GetNativePath() is newly allocated each time).
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*/
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virtual void UnGetNativePath(void* p) const;
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};
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/**
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@class wxGraphicsObject
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This class is the superclass of native graphics objects like pens etc. It
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allows reference counting. Not instantiated by user code.
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@library{wxcore}
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@category{gdi}
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@see wxGraphicsBrush, wxGraphicsPen, wxGraphicsMatrix, wxGraphicsPath
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*/
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class wxGraphicsObject : public wxObject
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{
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public:
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/**
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Returns the renderer that was used to create this instance, or @NULL
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if it has not been initialized yet.
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*/
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wxGraphicsRenderer* GetRenderer() const;
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/**
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@return @false if this object is valid, otherwise returns @true.
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*/
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bool IsNull() const;
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};
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/**
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@class wxGraphicsContext
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A wxGraphicsContext instance is the object that is drawn upon. It is created by
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a renderer using wxGraphicsRenderer::CreateContext(). This can be either directly
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using a renderer instance, or indirectly using the static convenience Create()
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functions of wxGraphicsContext that always delegate the task to the default renderer.
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@code
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void MyCanvas::OnPaint(wxPaintEvent &event)
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{
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// Create paint DC
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wxPaintDC dc(this);
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// Create graphics context from it
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wxGraphicsContext *gc = wxGraphicsContext::Create( dc );
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if (gc)
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{
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// make a path that contains a circle and some lines
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gc->SetPen( *wxRED_PEN );
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wxGraphicsPath path = gc->CreatePath();
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path.AddCircle( 50.0, 50.0, 50.0 );
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path.MoveToPoint(0.0, 50.0);
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path.AddLineToPoint(100.0, 50.0);
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path.MoveToPoint(50.0, 0.0);
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path.AddLineToPoint(50.0, 100.0 );
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path.CloseSubpath();
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path.AddRectangle(25.0, 25.0, 50.0, 50.0);
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gc->StrokePath(path);
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delete gc;
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}
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}
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@endcode
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@library{wxcore}
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@category{gdi,dc}
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@see wxGraphicsRenderer::CreateContext(), wxGCDC, wxDC
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*/
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class wxGraphicsContext : public wxGraphicsObject
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{
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public:
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/**
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Creates a wxGraphicsContext from a wxWindow.
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@see wxGraphicsRenderer::CreateContext()
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*/
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static wxGraphicsContext* Create( wxWindow* window ) ;
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/**
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Creates a wxGraphicsContext from a wxWindowDC
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@see wxGraphicsRenderer::CreateContext()
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*/
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static wxGraphicsContext* Create( const wxWindowDC& dc) ;
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/**
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Creates a wxGraphicsContext from a wxMemoryDC
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@see wxGraphicsRenderer::CreateContext()
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*/
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static wxGraphicsContext * Create( const wxMemoryDC& dc) ;
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/**
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Creates a wxGraphicsContext from a wxPrinterDC. Under
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GTK+, this will only work when using the GtkPrint
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printing backend which is available since GTK+ 2.10.
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@see wxGraphicsRenderer::CreateContext(), @ref overview_unixprinting "Printing under Unix"
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*/
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static wxGraphicsContext * Create( const wxPrinterDC& dc) ;
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/**
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Clips drawings to the region
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*/
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virtual void Clip(const wxRegion& region) = 0;
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/**
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Clips drawings to the rectangle.
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*/
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virtual void Clip(wxDouble x, wxDouble y, wxDouble w, wxDouble h) = 0;
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/**
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Concatenates the passed in transform with the current transform of this context
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*/
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virtual void ConcatTransform(const wxGraphicsMatrix& matrix) = 0;
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/**
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Creates a native brush from a wxBrush.
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*/
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virtual wxGraphicsBrush CreateBrush(const wxBrush& brush) const;
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/**
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Creates a native graphics font from a wxFont and a text colour.
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*/
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virtual wxGraphicsFont CreateFont(const wxFont& font,
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const wxColour& col = *wxBLACK) const;
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/**
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Creates a wxGraphicsContext from a native context. This native context must be
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eg a CGContextRef for Core Graphics, a Graphics pointer for GDIPlus or a
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cairo_t pointer for cairo.
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@see wxGraphicsRenderer:: CreateContextFromNativeContext
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*/
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static wxGraphicsContext* CreateFromNative(void* context);
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/**
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Creates a wxGraphicsContext from a native window.
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@see wxGraphicsRenderer:: CreateContextFromNativeWindow
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*/
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static wxGraphicsContext* CreateFromNativeWindow(void* window);
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/**
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Creates a native brush, having a linear gradient, starting at (x1,y1) with
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color c1 to (x2,y2) with color c2
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*/
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wxGraphicsBrush CreateLinearGradientBrush(wxDouble x1,
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wxDouble y1,
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wxDouble x2,
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wxDouble y2,
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const wxColouramp;c1,
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const wxColouramp;c2) const;
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/**
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Creates a native affine transformation matrix from the passed in values. The
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defaults result in an identity matrix.
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*/
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virtual wxGraphicsMatrix CreateMatrix(wxDouble a = 1.0, wxDouble b = 0.0,
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wxDouble c = 0.0, wxDouble d = 1.0,
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wxDouble tx = 0.0,
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wxDouble ty = 0.0) const;
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/**
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Creates a native graphics path which is initially empty.
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*/
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wxGraphicsPath CreatePath() const;
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/**
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Creates a native pen from a wxPen.
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*/
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virtual wxGraphicsPen CreatePen(const wxPen& pen) const;
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/**
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Creates a native brush, having a radial gradient originating at (xo,yc) with
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color oColour and ends on a circle around (xc,yc) with radius r and color cColour
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*/
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virtual wxGraphicsBrush CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
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wxDouble xc, wxDouble yc,
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wxDouble radius,
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const wxColour& oColor,
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const wxColour& cColor) const;
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/**
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Draws the bitmap. In case of a mono bitmap, this is treated as a mask and the
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current brushed is used for filling.
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*/
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virtual void DrawBitmap(const wxBitmap& bmp, wxDouble x, wxDouble y,
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wxDouble w, wxDouble h) = 0;
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/**
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Draws an ellipse.
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*/
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virtual void DrawEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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/**
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Draws the icon.
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*/
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virtual void DrawIcon(const wxIcon& icon, wxDouble x, wxDouble y,
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wxDouble w, wxDouble h) = 0;
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/**
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Draws a polygon.
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*/
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virtual void DrawLines(size_t n, const wxPoint2DDouble* points,
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int fillStyle = wxODDEVEN_RULE);
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/**
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Draws the path by first filling and then stroking.
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*/
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virtual void DrawPath(const wxGraphicsPath& path,
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int fillStyle = wxODDEVEN_RULE);
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/**
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Draws a rectangle.
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*/
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virtual void DrawRectangle(wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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/**
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Draws a rounded rectangle.
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*/
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virtual void DrawRoundedRectangle(wxDouble x, wxDouble y, wxDouble w,
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wxDouble h, wxDouble radius);
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//@{
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/**
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Draws a text at the defined position, at the given angle.
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*/
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void DrawText(const wxString& str, wxDouble x, wxDouble y,
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wxDouble angle);
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void DrawText(const wxString& str, wxDouble x, wxDouble y);
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//@}
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/**
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Fills the path with the current brush.
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*/
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virtual void FillPath(const wxGraphicsPath& path,
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int fillStyle = wxODDEVEN_RULE) = 0;
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/**
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Returns the native context (CGContextRef for Core Graphics, Graphics pointer
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for GDIPlus and cairo_t pointer for cairo).
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*/
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virtual void* GetNativeContext() = 0;
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/**
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Fills the @a widths array with the widths from the beginning of
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@a text to the corresponding character of @e text.
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*/
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virtual void GetPartialTextExtents(const wxString& text,
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wxArrayDouble& widths) const = 0;
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/**
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Gets the dimensions of the string using the currently selected font.
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@e string is the text string to measure, @e w and @e h are
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the total width and height respectively, @a descent is the
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dimension from the baseline of the font to the bottom of the
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descender, and @a externalLeading is any extra vertical space added
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to the font by the font designer (usually is zero).
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*/
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virtual void GetTextExtent(const wxString& text, wxDouble* width,
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wxDouble* height, wxDouble* descent,
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wxDouble* externalLeading) const = 0;
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/**
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Gets the current transformation matrix of this context.
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*/
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virtual wxGraphicsMatrix GetTransform() const = 0;
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/**
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Resets the clipping to original shape.
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*/
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virtual void ResetClip() = 0;
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/**
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Rotates the current transformation matrix (radians),
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*/
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virtual void Rotate(wxDouble angle) = 0;
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/**
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Scales the current transformation matrix.
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*/
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virtual void Scale(wxDouble xScale, wxDouble yScale) = 0;
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//@{
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/**
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Sets the brush for filling paths.
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*/
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void SetBrush(const wxBrush& brush);
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void SetBrush(const wxGraphicsBrush& brush);
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//@}
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//@{
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/**
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Sets the font for drawing text.
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*/
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void SetFont(const wxFont& font, const wxColour& colour);
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void SetFont(const wxGraphicsFont& font);
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//@}
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//@{
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/**
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Sets the pen used for stroking.
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*/
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void SetPen(const wxGraphicsPen& pen);
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void SetPen(const wxPen& pen);
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//@}
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/**
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Sets the current transformation matrix of this context
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*/
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virtual void SetTransform(const wxGraphicsMatrix& matrix) = 0;
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/**
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Strokes a single line.
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*/
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virtual void StrokeLine(wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2);
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//@{
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/**
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Stroke disconnected lines from begin to end points, fastest method available
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for this purpose.
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*/
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void StrokeLines(size_t n, const wxPoint2DDouble* beginPoints,
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const wxPoint2DDouble* endPoints);
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void StrokeLines(size_t n, const wxPoint2DDouble* points);
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//@}
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/**
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Strokes along a path with the current pen.
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*/
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virtual void StrokePath(const wxGraphicsPath& path) = 0;
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/**
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Translates the current transformation matrix.
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*/
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virtual void Translate(wxDouble dx, wxDouble dy) = 0;
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};
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/**
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@class wxGraphicsRenderer
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A wxGraphicsRenderer is the instance corresponding to the rendering engine
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used. There may be multiple instances on a system, if there are different
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rendering engines present, but there is always only one instance per engine.
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This instance is pointed back to by all objects created by it (wxGraphicsContext,
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wxGraphicsPath etc) and can be retrieved through their wxGraphicsObject::GetRenderer()
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method. Therefore you can create an additional instance of a path etc. by calling
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wxGraphicsObject::GetRenderer() and then using the appropriate CreateXXX function
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of that renderer.
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@code
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wxGraphicsPath *path = // from somewhere
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wxGraphicsBrush *brush = path->GetRenderer()->CreateBrush( *wxBLACK_BRUSH );
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@endcode
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@library{wxcore}
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@category{FIXME}
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*/
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class wxGraphicsRenderer : public wxObject
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{
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public:
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/**
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Creates a wxGraphicsContext from a wxWindow.
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*/
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virtual wxGraphicsContext* CreateContext(wxWindow* window) = 0;
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/**
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Creates a wxGraphicsContext from a wxWindowDC
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*/
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virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ;
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/**
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Creates a wxGraphicsContext from a wxMemoryDC
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*/
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virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0 ;
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/**
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Creates a wxGraphicsContext from a wxPrinterDC
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*/
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virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc) = 0 ;
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/**
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Creates a native brush from a wxBrush.
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*/
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virtual wxGraphicsBrush CreateBrush(const wxBrush& brush) = 0;
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/**
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Creates a wxGraphicsContext from a native context. This native context must be
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eg a CGContextRef for Core Graphics, a Graphics pointer for GDIPlus or a cairo_t
|
|
pointer for cairo.
|
|
*/
|
|
virtual wxGraphicsContext* CreateContextFromNativeContext(void* context) = 0;
|
|
|
|
/**
|
|
Creates a wxGraphicsContext from a native window.
|
|
*/
|
|
virtual wxGraphicsContext* CreateContextFromNativeWindow(void* window) = 0;
|
|
|
|
/**
|
|
Creates a native graphics font from a wxFont and a text colour.
|
|
*/
|
|
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
|
|
*/
|
|
wxGraphicsBrush CreateLinearGradientBrush(wxDouble x1,
|
|
wxDouble y1,
|
|
wxDouble x2,
|
|
wxDouble y2,
|
|
const wxColouramp;c1,
|
|
const wxColouramp;c2);
|
|
|
|
/**
|
|
Creates a native affine transformation matrix from the passed in values. The
|
|
defaults 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) = 0;
|
|
|
|
/**
|
|
Creates a native graphics path which is initially empty.
|
|
*/
|
|
virtual wxGraphicsPath CreatePath() = 0;
|
|
|
|
/**
|
|
Creates a native pen from a wxPen.
|
|
*/
|
|
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
|
|
*/
|
|
virtual wxGraphicsBrush CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
|
|
wxDouble xc, wxDouble yc,
|
|
wxDouble radius,
|
|
const wxColour& oColour,
|
|
const wxColour& cColour) = 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.
|
|
*/
|
|
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}
|
|
*/
|
|
class wxGraphicsBrush : public wxGraphicsObject
|
|
{
|
|
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.
|
|
|
|
@library{wxcore}
|
|
@category{FIXME}
|
|
*/
|
|
class wxGraphicsFont : public wxGraphicsObject
|
|
{
|
|
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.
|
|
|
|
@library{wxcore}
|
|
@category{FIXME}
|
|
*/
|
|
class wxGraphicsPen : public wxGraphicsObject
|
|
{
|
|
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.
|
|
|
|
@library{wxcore}
|
|
@category{FIXME}
|
|
*/
|
|
class wxGraphicsMatrix : public wxGraphicsObject
|
|
{
|
|
public:
|
|
//@{
|
|
/**
|
|
|
|
*/
|
|
void Concat(const wxGraphicsMatrix* t);
|
|
void Concat(const wxGraphicsMatrix& t);
|
|
//@}
|
|
|
|
/**
|
|
Returns the component values of the matrix via the argument pointers.
|
|
*/
|
|
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.
|
|
*/
|
|
virtual void* GetNativeMatrix() const;
|
|
|
|
/**
|
|
Inverts the matrix.
|
|
*/
|
|
virtual void Invert();
|
|
|
|
/**
|
|
Returns @true if the elements of the transformation matrix are equal.
|
|
*/
|
|
bool IsEqual(const wxGraphicsMatrix& t) const;
|
|
|
|
/**
|
|
Return @true if this is the identity matrix.
|
|
*/
|
|
virtual bool IsIdentity() const;
|
|
|
|
/**
|
|
Rotates this matrix (radians).
|
|
*/
|
|
virtual void Rotate(wxDouble angle);
|
|
|
|
/**
|
|
Scales this matrix.
|
|
*/
|
|
virtual void Scale(wxDouble xScale, wxDouble yScale);
|
|
|
|
/**
|
|
Sets the matrix to the respective values (default values are the identity
|
|
matrix)
|
|
*/
|
|
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)
|
|
*/
|
|
virtual void TransformDistance(wxDouble* dx, wxDouble* dy) const;
|
|
|
|
/**
|
|
Applies this matrix to a point.
|
|
*/
|
|
virtual void TransformPoint(wxDouble* x, wxDouble* y) const;
|
|
|
|
/**
|
|
Translates this matrix.
|
|
*/
|
|
virtual void Translate(wxDouble dx, wxDouble dy);
|
|
};
|