Class mxGraphSelectionModel

  • public class mxGraphSelectionModel
    extends mxEventSource
    Implements the selection model for a graph. This class fires the following events: mxEvent.UNDO fires after the selection was changed in changeSelection. The edit property contains the mxUndoableEdit which contains the mxSelectionChange. mxEvent.CHANGE fires after the selection changes by executing an mxSelectionChange. The added and removed properties contain Collections of cells that have been added to or removed from the selection, respectively. NOTE: Due to a historic bug that cannot be changed at this point the names of the properties are "reversed". To add a change listener to the graph selection model: addListener( mxEvent.CHANGE, new mxIEventListener() { public void invoke(Object sender, mxEventObject evt) { mxGraphSelectionModel model = (mxSelectionModel) sender; Collection added = (Collection) evt.getProperty("added"); Collection removed = (Collection) evt.getProperty("removed"); selectionChanged(model, added, removed); } });
    • Field Detail

      • graph

        protected mxGraph graph
        Reference to the enclosing graph.
      • singleSelection

        protected boolean singleSelection
        Specifies if only one selected item at a time is allowed. Default is false.
      • cells

        protected java.util.Set<java.lang.Object> cells
        Holds the selection cells.
    • Constructor Detail

      • mxGraphSelectionModel

        public mxGraphSelectionModel​(mxGraph graph)
        Constructs a new selection model for the specified graph.
        graph -
    • Method Detail

      • isSingleSelection

        public boolean isSingleSelection()
        the singleSelection
      • setSingleSelection

        public void setSingleSelection​(boolean singleSelection)
        singleSelection - the singleSelection to set
      • isSelected

        public boolean isSelected​(java.lang.Object cell)
        Returns true if the given cell is selected.
        cell -
        Returns true if the given cell is selected.
      • isEmpty

        public boolean isEmpty()
        Returns true if no cells are selected.
      • size

        public int size()
        Returns the number of selected cells.
      • clear

        public void clear()
        Clears the selection.
      • getCell

        public java.lang.Object getCell()
        Returns the first selected cell.
      • getCells

        public java.lang.Object[] getCells()
        Returns the selection cells.
      • setCell

        public void setCell​(java.lang.Object cell)
        Clears the selection and adds the given cell to the selection.
      • setCells

        public void setCells​(java.lang.Object[] cells)
        Clears the selection and adds the given cells.
      • getFirstSelectableCell

        protected java.lang.Object getFirstSelectableCell​(java.lang.Object[] cells)
        Returns the first selectable cell in the given array of cells.
        cells - Array of cells to return the first selectable cell for.
        Returns the first cell that may be selected.
      • addCell

        public void addCell​(java.lang.Object cell)
        Adds the given cell to the selection.
      • addCells

        public void addCells​(java.lang.Object[] cells)
      • removeCell

        public void removeCell​(java.lang.Object cell)
        Removes the given cell from the selection.
      • removeCells

        public void removeCells​(java.lang.Object[] cells)
      • changeSelection

        protected void changeSelection​(java.util.Collection<java.lang.Object> added,
                                       java.util.Collection<java.lang.Object> removed)
      • cellAdded

        protected void cellAdded​(java.lang.Object cell)
      • cellRemoved

        protected void cellRemoved​(java.lang.Object cell)