382f12e419
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57992 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
840 lines
26 KiB
Objective-C
840 lines
26 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: graphics.h
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// Purpose: interface of various wxGraphics* classes
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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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virtual 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
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created by a renderer using wxGraphicsRenderer::CreateContext(). This can
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be either directly using a renderer instance, or indirectly using the
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static convenience Create() functions of wxGraphicsContext that always
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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 GTK+, this will
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only work when using the GtkPrint printing backend which is available
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since GTK+ 2.10.
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@see wxGraphicsRenderer::CreateContext(), @ref overview_unixprinting
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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 specified 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 specified 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
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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
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must be a CGContextRef for Core Graphics, a Graphics pointer for
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GDIPlus, or a 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
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(@a x1, @a y1) with color @a c1 to (@a x2, @a y2) with color @a c2.
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*/
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virtual 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 wxColour& c1,
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const wxColour& c2) const;
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/**
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Creates a native affine transformation matrix from the passed in
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values. The default parameters 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
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(@a xo, @a yc) with color @a oColour and ends on a circle around
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(@a xc, @a yc) with the given @a radius and color @a 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
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and the 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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wxPolygonFillMode 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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wxPolygonFillMode 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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Draws text at the defined position.
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*/
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void DrawText(const wxString& str, wxDouble x, wxDouble y);
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/**
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Draws text at the defined position.
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@param str
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The text to draw.
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@param x
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The x coordinate position to draw the text at.
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@param y
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The y coordinate position to draw the text at.
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@param angle
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The angle relative to the (default) horizontal direction to draw
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the string.
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*/
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void DrawText(const wxString& str, wxDouble x, wxDouble y, wxDouble angle);
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/**
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Draws text at the defined position.
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@param str
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The text to draw.
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@param x
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The x coordinate position to draw the text at.
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@param y
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The y coordinate position to draw the text at.
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@param backgroundBrush
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Brush to fill the text with.
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*/
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void DrawText(const wxString& str, wxDouble x, wxDouble y,
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const wxGraphicsBrush& backgroundBrush);
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/**
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Draws text at the defined position.
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@param str
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The text to draw.
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@param x
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The x coordinate position to draw the text at.
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@param y
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The y coordinate position to draw the text at.
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@param angle
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The angle relative to the (default) horizontal direction to draw
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the string.
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@param backgroundBrush
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Brush to fill the text with.
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*/
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void DrawText(const wxString& str, wxDouble x, wxDouble y,
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wxDouble angle, const wxGraphicsBrush& backgroundBrush);
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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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wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0;
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/**
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Returns the native context (CGContextRef for Core Graphics, Graphics
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pointer 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 @a 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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@param text
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The text string to measure.
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@param width
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Variable to store the total calculated width of the text.
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@param height
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Variable to store the total calculated height of the text.
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@param descent
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Variable to store the dimension from the baseline of the font to
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the bottom of the descender.
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@param externalLeading
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Any extra vertical space added to the font by the font designer
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(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 (in 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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Sets the brush for filling paths.
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*/
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void SetBrush(const wxBrush& brush);
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/**
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Sets the brush for filling paths.
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*/
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virtual void SetBrush(const wxGraphicsBrush& brush);
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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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/**
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Sets the font for drawing text.
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*/
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virtual void SetFont(const wxGraphicsFont& font);
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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 wxPen& pen);
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/**
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Sets the pen used for stroking.
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*/
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virtual void SetPen(const wxGraphicsPen& pen);
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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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Stroke disconnected lines from begin to end points, fastest method
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available for this purpose.
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*/
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virtual void StrokeLines(size_t n, const wxPoint2DDouble* beginPoints,
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const wxPoint2DDouble* endPoints);
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/**
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Stroke disconnected lines from begin to end points, fastest method
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available for this purpose.
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*/
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virtual void StrokeLines(size_t n, const wxPoint2DDouble* points);
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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
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engine. This instance is pointed back to by all objects created by it
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(wxGraphicsContext, wxGraphicsPath etc) and can be retrieved through their
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wxGraphicsObject::GetRenderer() method. Therefore you can create an
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additional instance of a path etc. by calling
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wxGraphicsObject::GetRenderer() and then using the appropriate CreateXXX()
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function 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{gdi}
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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
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must be a CGContextRef for Core Graphics, a Graphics pointer for
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GDIPlus, or a cairo_t pointer for cairo.
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*/
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virtual wxGraphicsContext* CreateContextFromNativeContext(void* context) = 0;
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/**
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Creates a wxGraphicsContext from a native window.
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*/
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virtual wxGraphicsContext* CreateContextFromNativeWindow(void* window) = 0;
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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) = 0;
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/**
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Creates a native brush, having a linear gradient, starting at
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(@a x1, @a y1) with color @a c1 to (@a x2, @a y2) with color @a c2.
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*/
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virtual 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 wxColour& c1,
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const wxColour& c2) = 0;
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/**
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Creates a native affine transformation matrix from the passed in
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values. The 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) = 0;
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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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virtual wxGraphicsPath CreatePath() = 0;
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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) = 0;
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/**
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Creates a native brush, having a radial gradient originating at
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(@a xo, @a yc) with color @a oColour and ends on a circle around
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(@a xc, @a yc) with the given @a radius and color @a 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& oColour,
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const wxColour& cColour) = 0;
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/**
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Returns the default renderer on this platform. On OS X this is the Core
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Graphics (a.k.a. Quartz 2D) renderer, on MSW the GDIPlus renderer, and
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on GTK we currently default to the cairo renderer.
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*/
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static wxGraphicsRenderer* GetDefaultRenderer();
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};
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/**
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@class wxGraphicsBrush
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A wxGraphicsBrush is a native representation of a brush. The contents are
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specific and private to the respective renderer. Instances are ref counted
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and can therefore be assigned as usual. The only way to get a valid
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instance is via wxGraphicsContext::CreateBrush() or
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wxGraphicsRenderer::CreateBrush().
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@library{wxcore}
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@category{gdi}
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*/
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class wxGraphicsBrush : public wxGraphicsObject
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{
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public:
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};
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/**
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@class wxGraphicsFont
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A wxGraphicsFont is a native representation of a font. The contents are
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specific and private to the respective renderer. Instances are ref counted
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and can therefore be assigned as usual. The only way to get a valid
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instance is via wxGraphicsContext::CreateFont() or
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wxGraphicsRenderer::CreateFont().
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@library{wxcore}
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@category{gdi}
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*/
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class wxGraphicsFont : public wxGraphicsObject
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{
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public:
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};
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/**
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@class wxGraphicsPen
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A wxGraphicsPen is a native representation of a pen. The contents are
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specific and private to the respective renderer. Instances are ref counted
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and can therefore be assigned as usual. The only way to get a valid
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instance is via wxGraphicsContext::CreatePen() or
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wxGraphicsRenderer::CreatePen().
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@library{wxcore}
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@category{gdi}
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*/
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class wxGraphicsPen : public wxGraphicsObject
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{
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public:
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};
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/**
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@class wxGraphicsMatrix
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A wxGraphicsMatrix is a native representation of an affine matrix. The
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contents are specific and private to the respective renderer. Instances are
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ref counted and can therefore be assigned as usual. The only way to get a
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valid instance is via wxGraphicsContext::CreateMatrix() or
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wxGraphicsRenderer::CreateMatrix().
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@library{wxcore}
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@category{gdi}
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*/
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class wxGraphicsMatrix : public wxGraphicsObject
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{
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public:
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/**
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Concatenates the matrix passed with the current matrix.
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*/
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virtual void Concat(const wxGraphicsMatrix* t);
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/**
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Concatenates the matrix passed with the current matrix.
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*/
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void Concat(const wxGraphicsMatrix& t);
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/**
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Returns the component values of the matrix via the argument pointers.
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*/
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virtual void Get(wxDouble* a = NULL, wxDouble* b = NULL,
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wxDouble* c = NULL, wxDouble* d = NULL,
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wxDouble* tx = NULL, wxDouble* ty = NULL) const;
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/**
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Returns the native representation of the matrix. For CoreGraphics this
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is a CFAffineMatrix pointer, for GDIPlus a Matrix Pointer, and for
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Cairo a cairo_matrix_t pointer.
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*/
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virtual void* GetNativeMatrix() const;
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/**
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Inverts the matrix.
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*/
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virtual void Invert();
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/**
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Returns @true if the elements of the transformation matrix are equal.
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*/
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virtual bool IsEqual(const wxGraphicsMatrix* t) const;
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/**
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Returns @true if the elements of the transformation matrix are equal.
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*/
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bool IsEqual(const wxGraphicsMatrix& t) const;
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/**
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Return @true if this is the identity matrix.
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*/
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virtual bool IsIdentity() const;
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/**
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Rotates this matrix (in radians).
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*/
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virtual void Rotate(wxDouble angle);
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/**
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Scales this matrix.
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*/
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virtual void Scale(wxDouble xScale, wxDouble yScale);
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/**
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Sets the matrix to the respective values (default values are the
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identity matrix).
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*/
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virtual void Set(wxDouble a = 1.0, wxDouble b = 0.0, wxDouble c = 0.0,
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wxDouble d = 1.0, wxDouble tx = 0.0, wxDouble ty = 0.0);
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/**
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Applies this matrix to a distance (ie. performs all transforms except
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translations).
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*/
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virtual void TransformDistance(wxDouble* dx, wxDouble* dy) const;
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/**
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Applies this matrix to a point.
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*/
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virtual void TransformPoint(wxDouble* x, wxDouble* y) const;
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/**
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Translates this matrix.
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*/
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virtual void Translate(wxDouble dx, wxDouble dy);
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};
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