org.kie.workbench.common.stunner.core.client.canvas.util

Class CanvasLayoutUtils

java.lang.Object

org.kie.workbench.common.stunner.core.client.canvas.util.CanvasLayoutUtils

@Dependent
public class CanvasLayoutUtils
extends Object

This class is a basic implementation for achieving a simple layout mechanism. It finds an empty area on the canvas where new elements could be place as: - Calling getNextLayoutPosition( CanvasHandler canvasHandler ) returns the cartesian coordinates for an empty area found in the diagram's graph that is being managed by the canvas handler instance. - Calling getNextLayoutPosition( CanvasHandler canvasHandler, Element> source ) returns the cartesian coordinates for an empty area found in the diagram's graph but relative to the given source argument and its parent, if any. In both cases the resulting coordinates are given from the coordinates of the visible element in the graph, which is position is on bottom right rather than the others, plus a given PADDING anb some error margin given by the MARGIN floating point.

TODO: This has to be refactored by the use of a good impl that achieve good dynamic layouts. Probably each Definition Set / Diagram will require a different layout manager as well.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	CanvasLayoutUtils.LayoutBoundExceededException

Constructor Summary

Constructors

Constructor and Description
CanvasLayoutUtils()

Method Summary

Modifier and Type	Method and Description
double[]	getNext(CanvasHandler canvasHandler, double width, double height)
double[]	getNext(CanvasHandler canvasHandler, double w, double h, double minX, double minY)
double[]	getNext(CanvasHandler canvasHandler, Node<View<?>,Edge> root)
double[]	getNext(CanvasHandler canvasHandler, Node<View<?>,Edge> root, double w, double h, double minX, double minY)
static boolean	isCanvasRoot(Diagram diagram, Element parent)
static boolean	isCanvasRoot(Diagram diagram, String pUUID)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CanvasLayoutUtils

public CanvasLayoutUtils()

Method Detail

isCanvasRoot

public static boolean isCanvasRoot(Diagram diagram,
                                   Element parent)

isCanvasRoot

public static boolean isCanvasRoot(Diagram diagram,
                                   String pUUID)

getNext

public double[] getNext(CanvasHandler canvasHandler,
                        double width,
                        double height)

getNext

public double[] getNext(CanvasHandler canvasHandler,
                        double w,
                        double h,
                        double minX,
                        double minY)

getNext

public double[] getNext(CanvasHandler canvasHandler,
                        Node<View<?>,Edge> root)

getNext

public double[] getNext(CanvasHandler canvasHandler,
                        Node<View<?>,Edge> root,
                        double w,
                        double h,
                        double minX,
                        double minY)