Module org.jgrapht.core
Package org.jgrapht.alg.drawing.model

Interface LayoutModel2D<V>

  • Type Parameters:
    V - the vertex type
    All Superinterfaces:
    Iterable<Map.Entry<V,​Point2D>>
    All Known Implementing Classes:
    ListenableLayoutModel2D, MapLayoutModel2D
    public interface LayoutModel2D<V>
extends Iterable<Map.Entry<V,​Point2D>>
    A general interface for the 2D layout model. The layout model provides the necessary components to a LayoutAlgorithm2D in order to draw a graph. Its responsibility is to provide the available drawable area, to be able to store and answer queries about vertex coordinates, and to allow someone to fix (make permanent) a vertex location.
    Author:
    Dimitrios Michail

    • Method Detail

      • getDrawableArea

        Box2D getDrawableArea()
        Get the drawable area of the model.
        Returns:
        the drawable area of the model

      • setDrawableArea

        void setDrawableArea​(Box2D drawableArea)
        Set the drawable area of the model.
        Parameters:
        drawableArea - the drawable area to use

      • get

        Point2D get​(V vertex)
        Get the last location of a particular vertex in the model. May return null if the vertex has not been assigned a location or if the particular implementation does not store the coordinates.
        Parameters:
        vertex - the graph vertex
        Returns:
        the last location of the vertex

      • put

        Point2D put​(V vertex,
            Point2D point)
        Set the location of a vertex.
        Parameters:
        vertex - the graph vertex
        point - the location
        Returns:
        the previous location or null if the vertex did not have a previous location or if the model does not store locations

      • setFixed

        void setFixed​(V vertex,
              boolean fixed)
        Set a point as being a "fixed-point" or not. It is the model's responsibility to make sure that changing the coordinates of a fixed point by calling put(Object, Point2D) has no effect.
        Parameters:
        vertex - a vertex
        fixed - whether it is a fixed point or not.

      • isFixed

        boolean isFixed​(V vertex)
        Check whether a vertex is a fixed point. It is the model's responsibility to make sure that changing the coordinates of a fixed point by calling put(Object, Point2D) has no effect.
        Parameters:
        vertex - the vertex
        Returns:
        true if a fixed point, false otherwise

      • collect

        default Map<V,​Point2D> collect()
        Collect a map of all vertices locations. May return null if the model does not store locations.
        Returns:
        a map with all the locations

      • iterator

        Iterator<Map.Entry<V,​Point2D>> iterator()
        Get an iterator with all vertices' locations. May return an empty iterator if the model does not store locations.
        Specified by:
        iterator in interface Iterable<V>
        Returns:
        an iterator which returns all vertices with their locations. May return an empty iterator if the model does not store locations.