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Java Standard Edition (SE)

DefaultTableColumnModel


javax.swing.table

Class DefaultTableColumnModel

    • Field Detail

      • tableColumns

        protected Vector<TableColumn> tableColumns
        Array of TableColumn objects in this model
      • selectionModel

        protected ListSelectionModel selectionModel
        Model for keeping track of column selections
      • columnMargin

        protected int columnMargin
        Width margin between each column
      • listenerList

        protected EventListenerList listenerList
        List of TableColumnModelListener
      • changeEvent

        protected transient ChangeEvent changeEvent
        Change event (only one needed)
      • columnSelectionAllowed

        protected boolean columnSelectionAllowed
        Column selection allowed in this column model
      • totalColumnWidth

        protected int totalColumnWidth
        A local cache of the combined width of all columns
    • Constructor Detail

      • DefaultTableColumnModel

        public DefaultTableColumnModel()
        Creates a default table column model.
    • Method Detail

      • removeColumn

        public void removeColumn(TableColumn column)
        Deletes the column from the tableColumns array. This method will do nothing if column is not in the table's columns list. tile is called to resize both the header and table views. This method also posts a columnRemoved event to its listeners.
        Specified by:
        removeColumn in interface TableColumnModel
        Parameters:
        column - the TableColumn to be removed
        See Also:
        addColumn(javax.swing.table.TableColumn)
      • moveColumn

        public void moveColumn(int columnIndex,
                               int newIndex)
        Moves the column and heading at columnIndex to newIndex. The old column at columnIndex will now be found at newIndex. The column that used to be at newIndex is shifted left or right to make room. This will not move any columns if columnIndex equals newIndex. This method also posts a columnMoved event to its listeners.
        Specified by:
        moveColumn in interface TableColumnModel
        Parameters:
        columnIndex - the index of column to be moved
        newIndex - new index to move the column
        Throws:
        IllegalArgumentException - if column or newIndex are not in the valid range
      • getColumnCount

        public int getColumnCount()
        Returns the number of columns in the tableColumns array.
        Specified by:
        getColumnCount in interface TableColumnModel
        Returns:
        the number of columns in the tableColumns array
        See Also:
        getColumns()
      • getColumnIndex

        public int getColumnIndex(Object identifier)
        Returns the index of the first column in the tableColumns array whose identifier is equal to identifier, when compared using equals.
        Specified by:
        getColumnIndex in interface TableColumnModel
        Parameters:
        identifier - the identifier object
        Returns:
        the index of the first column in the tableColumns array whose identifier is equal to identifier
        Throws:
        IllegalArgumentException - if identifier is null, or if no TableColumn has this identifier
        See Also:
        getColumn(int)
      • getColumn

        public TableColumn getColumn(int columnIndex)
        Returns the TableColumn object for the column at columnIndex.
        Specified by:
        getColumn in interface TableColumnModel
        Parameters:
        columnIndex - the index of the column desired
        Returns:
        the TableColumn object for the column at columnIndex
      • getColumnMargin

        public int getColumnMargin()
        Returns the width margin for TableColumn. The default columnMargin is 1.
        Specified by:
        getColumnMargin in interface TableColumnModel
        Returns:
        the maximum width for the TableColumn
        See Also:
        setColumnMargin(int)
      • getColumnIndexAtX

        public int getColumnIndexAtX(int x)
        Returns the index of the column that lies at position x, or -1 if no column covers this point. In keeping with Swing's separable model architecture, a TableColumnModel does not know how the table columns actually appear on screen. The visual presentation of the columns is the responsibility of the view/controller object using this model (typically JTable). The view/controller need not display the columns sequentially from left to right. For example, columns could be displayed from right to left to accommodate a locale preference or some columns might be hidden at the request of the user. Because the model does not know how the columns are laid out on screen, the given xPosition should not be considered to be a coordinate in 2D graphics space. Instead, it should be considered to be a width from the start of the first column in the model. If the column index for a given X coordinate in 2D space is required, JTable.columnAtPoint can be used instead.
        Specified by:
        getColumnIndexAtX in interface TableColumnModel
        Parameters:
        x - the horizontal location of interest
        Returns:
        the index of the column or -1 if no column is found
        See Also:
        JTable.columnAtPoint(java.awt.Point)
      • getTotalColumnWidth

        public int getTotalColumnWidth()
        Returns the total combined width of all columns.
        Specified by:
        getTotalColumnWidth in interface TableColumnModel
        Returns:
        the totalColumnWidth property
      • getSelectedColumns

        public int[] getSelectedColumns()
        Returns an array of selected columns. If selectionModel is null, returns an empty array.
        Specified by:
        getSelectedColumns in interface TableColumnModel
        Returns:
        an array of selected columns or an empty array if nothing is selected or the selectionModel is null
      • getSelectedColumnCount

        public int getSelectedColumnCount()
        Returns the number of columns selected.
        Specified by:
        getSelectedColumnCount in interface TableColumnModel
        Returns:
        the number of columns selected
      • fireColumnAdded

        protected void fireColumnAdded(TableColumnModelEvent e)
        Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
        Parameters:
        e - the event received
        See Also:
        EventListenerList
      • fireColumnRemoved

        protected void fireColumnRemoved(TableColumnModelEvent e)
        Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
        Parameters:
        e - the event received
        See Also:
        EventListenerList
      • fireColumnMoved

        protected void fireColumnMoved(TableColumnModelEvent e)
        Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
        Parameters:
        e - the event received
        See Also:
        EventListenerList
      • fireColumnSelectionChanged

        protected void fireColumnSelectionChanged(ListSelectionEvent e)
        Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
        Parameters:
        e - the event received
        See Also:
        EventListenerList
      • fireColumnMarginChanged

        protected void fireColumnMarginChanged()
        Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
        See Also:
        EventListenerList
      • getListeners

        public <T extends EventListener> T[] getListeners(Class<T> listenerType)
        Returns an array of all the objects currently registered as FooListeners upon this model. FooListeners are registered using the addFooListener method.

        You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a DefaultTableColumnModel m for its column model listeners with the following code:

        ColumnModelListener[] cmls = (ColumnModelListener[])(m.getListeners(ColumnModelListener.class));
        If no such listeners exist, this method returns an empty array.
        Parameters:
        listenerType - the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener
        Returns:
        an array of all objects registered as FooListeners on this model, or an empty array if no such listeners have been added
        Throws:
        ClassCastException - if listenerType doesn't specify a class or interface that implements java.util.EventListener
        Since:
        1.3
        See Also:
        getColumnModelListeners()
      • propertyChange

        public void propertyChange(PropertyChangeEvent evt)
        Property Change Listener change method. Used to track changes to the column width or preferred column width.
        Specified by:
        propertyChange in interface PropertyChangeListener
        Parameters:
        evt - PropertyChangeEvent
      • valueChanged

        public void valueChanged(ListSelectionEvent e)
        A ListSelectionListener that forwards ListSelectionEvents when there is a column selection change.
        Specified by:
        valueChanged in interface ListSelectionListener
        Parameters:
        e - the change event
      • createSelectionModel

        protected ListSelectionModel createSelectionModel()
        Creates a new default list selection model.
      • recalcWidthCache

        protected void recalcWidthCache()
        Recalculates the total combined width of all columns. Updates the totalColumnWidth property.


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