Canvas (2D Graphics)¶

API: Canvas (2D Graphics)

API

Classes
class	cFigure
	A lightweight graphical object for cCanvas. More...
struct	cFigure::Point
	Represents a point as (x,y) coordinates. More...
struct	cFigure::Rectangle
	Represents a rectangle as an (x,y,width,height) tuple. More...
struct	cFigure::Color
	Represents an RGB color. More...
struct	cFigure::Font
	Represents properties of a font. More...
struct	cFigure::Transform
	Homogeneous 2D transformation matrix. More...
struct	cFigure::RGBA
	Represents an RGBA pixel, for Pixmap manipulation. More...
class	cFigure::Pixmap
	A rectangular RGBA pixel array. More...
class	cGroupFigure
	A figure with the sole purpose of grouping its children, and no visual representation. More...
class	cPanelFigure
	Sets up an axis-aligned, unscaled coordinate system for children, canceling the effect of any transformation (scaling, rotation, etc.) inherited from ancestor figures. More...
class	cAbstractLineFigure
	Common base class for line figures. More...
class	cLineFigure
	A figure that displays a straight line segment. More...
class	cArcFigure
	A figure that displays an arc. More...
class	cPolylineFigure
	A figure that displays a line that consists of multiple connecting straight line segments or of a single smooth curve. More...
class	cAbstractShapeFigure
	Abstract base class for various shapes. More...
class	cRectangleFigure
	A figure that displays a rectangle, with optionally rounded corners. More...
class	cOvalFigure
	A figure that draws a circle or ellipse. More...
class	cRingFigure
	A figure that displays a ring, with explicitly controllable inner/outer radii. More...
class	cPieSliceFigure
	A figure that displays a pie slice, that is, a section of an axis-aligned disc or filled ellipse. More...
class	cPolygonFigure
	A figure that displays a (closed) polygon, determined by a sequence of points. More...
class	cPathFigure
	A figure that displays a "path", a complex shape or line modeled after SVG paths. More...
class	cAbstractTextFigure
	Abstract base class for figures that display text. Text may be multi-line. More...
class	cTextFigure
	A figure that displays text which is affected by zooming and transformations. More...
class	cLabelFigure
	A figure that displays text which is unaffected by zooming or transformations, except for its position. More...
class	cAbstractImageFigure
	Abstract base class for figures that display an image. More...
class	cImageFigure
	A figure that displays an image, typically an icon or a background image, loaded from the OMNeT++ image path. More...
class	cIconFigure
	A figure that displays an image, typically an icon or a background image, loaded from the OMNeT++ image path, in a non-zooming way. More...
class	cPixmapFigure
	A figure that displays an image that can be manipulated programmatically. More...
class	cCanvas
	Provides a scene graph based 2D drawing API for modules. More...

Predefined colors.
enum	FontStyle
	Font style constants: FONT_NONE, FONT_BOLD, etc. More...
enum	LineStyle
	Line style constants: LINE_SOLID, LINE_DOTTED, etc. More...
enum	CapStyle
	Line cap style constants: CAP_BUTT, CAP_SQUARE, etc. More...
enum	JoinStyle
	Line join style constants: JOIN_BEVEL, JOIN_MITER, etc. More...
enum	FillRule
	Fill rule constants: FILL_EVENODD, FILL_NONZERO. More...
enum	Arrowhead
	Arrowhead style constants: ARROW_NONE, ARROW_SIMPLE, etc. More...
enum	Interpolation
	Image interpolation mode constants: INTERPOLATION_NONE, INTERPOLATION_FAST, etc. More...
enum	Anchor
	Anchoring mode constants: ANCHOR_CENTER, ANCHOR_N, etc. More...
enum	Alignment
	Text alignment mode constants: ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER. More...

Description

OMNeT++ provides a 2D figure-based drawing API. The central classes are cFigure and cCanvas.

One can create figure objects (derived from cFigure), and place them on a canvas (cCanvas). Every module has its own canvas (cModule::getCanvas()), and one may create additional ones directly.

cFigure contains the following utility classes: