Package drawit.shapegroups1

Class ShapeGroup

java.lang.Object
drawit.shapegroups1.ShapeGroup
Direct Known Subclasses:
LeafShapeGroup, NonleafShapeGroup
public abstract class ShapeGroup
extends Object
Each instance of this class represents a shape group. A shape group is either a leaf group, in which case it directly contains a single shape, or it is a non-leaf group, in which case it directly contains two or more subgroups, which are themselves shape groups.

  • Method Summary

    Modifier and Type Method Description
    void bringToFront()
    Moves this shape group to the front of its parent's list of subgroups.
    abstract List<RoundedPolygon> getAllShapes()
    Returns a list of all RoundedPolygon objects contained directly or indirectly by this shape group, in some unspecified order.
    Map<RoundedPolygon,​IntPoint[]> getAllVertices()
    Returns a map that maps each RoundedPolygon object contained directly or indirectly by this shape group to its current list of vertices.
    abstract Extent getBoundingBox()
    Returns the smallest axis-aligned rectangle that contains all shapes contained directly or indirectly by this shape group.
    abstract String getDrawingCommands()
    Returns a textual representation of a sequence of drawing commands for drawing the shapes contained directly or indirectly by this shape group.
    NonleafShapeGroup getParentGroup()
    Returns the shape group that directly contains this shape group, or null if no shape group directly contains this shape group.
    void scale​(IntPoint origin, double xFactor, double yFactor)
    Scales the shapes contained directly or indirectly by this shape group by the given factors in the X and Y direction, respectively.
    void sendToBack()
    Moves this shape group to the back of its parent's list of subgroups.
    void translate​(IntVector delta)
    Translates (= displaces) the shapes contained directly or indirectly by this shape group along the given vector.

    Methods inherited from class java.lang.Object

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

  • Method Details

    • getParentGroup

      public NonleafShapeGroup getParentGroup()
      Returns the shape group that directly contains this shape group, or null if no shape group directly contains this shape group.

    • getAllShapes

      public abstract List<RoundedPolygon> getAllShapes()
      Returns a list of all RoundedPolygon objects contained directly or indirectly by this shape group, in some unspecified order.

    • getAllVertices

      public Map<RoundedPolygon,​IntPoint[]> getAllVertices()
      Returns a map that maps each RoundedPolygon object contained directly or indirectly by this shape group to its current list of vertices.

    • getBoundingBox

      public abstract Extent getBoundingBox()
      Returns the smallest axis-aligned rectangle that contains all shapes contained directly or indirectly by this shape group.

    • getDrawingCommands

      public abstract String getDrawingCommands()
      Returns a textual representation of a sequence of drawing commands for drawing the shapes contained directly or indirectly by this shape group. For the syntax of the drawing commands, see RoundedPolygon.getDrawingCommands().

    • bringToFront

      public void bringToFront()
      Moves this shape group to the front of its parent's list of subgroups.

    • sendToBack

      public void sendToBack()
      Moves this shape group to the back of its parent's list of subgroups.

    • translate

      public void translate​(IntVector delta)
      Translates (= displaces) the shapes contained directly or indirectly by this shape group along the given vector.

    • scale

      public void scale​(IntPoint origin, double xFactor, double yFactor)
      Scales the shapes contained directly or indirectly by this shape group by the given factors in the X and Y direction, respectively. The scaling is done with respect to the given origin.