Class ListEditor

  • Direct Known Subclasses:
    PathEditor

    public abstract class ListEditor
    extends FieldEditor
    An abstract field editor that manages a list of input values. The editor displays a list containing the values, buttons for adding and removing values, and Up and Down buttons to adjust the order of elements in the list.

    Subclasses must implement the parseString, createList, and getNewInputObject framework methods.

    • Constructor Detail

      • ListEditor

        protected ListEditor()
        Creates a new list field editor
      • ListEditor

        protected ListEditor​(String name,
                             String labelText,
                             Composite parent)
        Creates a list field editor.
        Parameters:
        name - the name of the preference this field editor works on
        labelText - the label text of the field editor
        parent - the parent of the field editor's control
    • Method Detail

      • adjustForNumColumns

        protected void adjustForNumColumns​(int numColumns)
        Description copied from class: FieldEditor
        Adjusts the horizontal span of this field editor's basic controls.

        Subclasses must implement this method to adjust the horizontal span of controls so they appear correct in the given number of columns.

        The number of columns will always be equal to or greater than the value returned by this editor's getNumberOfControls method.

        Specified by:
        adjustForNumColumns in class FieldEditor
        Parameters:
        numColumns - the number of columns
      • createList

        protected abstract String createList​(String[] items)
        Combines the given list of items into a single string. This method is the converse of parseString.

        Subclasses must implement this method.

        Parameters:
        items - the list of items
        Returns:
        the combined string
        See Also:
        parseString(java.lang.String)
      • createSelectionListener

        public void createSelectionListener()
        Creates a selection listener.
      • doFillIntoGrid

        protected void doFillIntoGrid​(Composite parent,
                                      int numColumns)
        Description copied from class: FieldEditor
        Fills this field editor's basic controls into the given parent.

        Subclasses must implement this method to create the controls for this field editor.

        Note this method may be called by the constructor, so it must not access fields on the receiver object because they will not be fully initialized.

        Specified by:
        doFillIntoGrid in class FieldEditor
        Parameters:
        parent - the composite used as a parent for the basic controls; the parent's layout must be a GridLayout
        numColumns - the number of columns
      • doLoad

        protected void doLoad()
        Description copied from class: FieldEditor
        Initializes this field editor with the preference value from the preference store.

        Subclasses must implement this method to properly initialize the field editor.

        Specified by:
        doLoad in class FieldEditor
      • doLoadDefault

        protected void doLoadDefault()
        Description copied from class: FieldEditor
        Initializes this field editor with the default preference value from the preference store.

        Subclasses must implement this method to properly initialize the field editor.

        Specified by:
        doLoadDefault in class FieldEditor
      • doStore

        protected void doStore()
        Description copied from class: FieldEditor
        Stores the preference value from this field editor into the preference store.

        Subclasses must implement this method to save the entered value into the preference store.

        Specified by:
        doStore in class FieldEditor
      • getButtonBoxControl

        public Composite getButtonBoxControl​(Composite parent)
        Returns this field editor's button box containing the Add, Remove, Up, and Down button.
        Parameters:
        parent - the parent control
        Returns:
        the button box
      • getListControl

        public List getListControl​(Composite parent)
        Returns this field editor's list control.
        Parameters:
        parent - the parent control
        Returns:
        the list control
      • getNewInputObject

        protected abstract String getNewInputObject()
        Creates and returns a new item for the list.

        Subclasses must implement this method.

        Returns:
        a new item
      • getNumberOfControls

        public int getNumberOfControls()
        Description copied from class: FieldEditor
        Returns the number of basic controls this field editor consists of.
        Specified by:
        getNumberOfControls in class FieldEditor
        Returns:
        the number of controls
      • getShell

        protected Shell getShell()
        Returns this field editor's shell.

        This method is internal to the framework; subclassers should not call this method.

        Returns:
        the shell
      • parseString

        protected abstract String[] parseString​(String stringList)
        Splits the given string into a list of strings. This method is the converse of createList.

        Subclasses must implement this method.

        Parameters:
        stringList - the string
        Returns:
        an array of String
        See Also:
        createList(java.lang.String[])
      • selectionChanged

        protected void selectionChanged()
        Invoked when the selection in the list has changed.

        The default implementation of this method utilizes the selection index and the size of the list to toggle the enablement of the up, down and remove buttons.

        Sublcasses may override.

        Since:
        3.5
      • setFocus

        public void setFocus()
        Description copied from class: FieldEditor
        Sets the focus to this field editor.

        The default implementation of this framework method does nothing. Subclasses may reimplement.

        Overrides:
        setFocus in class FieldEditor
      • setEnabled

        public void setEnabled​(boolean enabled,
                               Composite parent)
        Description copied from class: FieldEditor
        Set whether or not the controls in the field editor are enabled.
        Overrides:
        setEnabled in class FieldEditor
        Parameters:
        enabled - The enabled state.
        parent - The parent of the controls in the group. Used to create the controls if required.
      • getAddButton

        protected Button getAddButton()
        Return the Add button.
        Returns:
        the button
        Since:
        3.5
      • getRemoveButton

        protected Button getRemoveButton()
        Return the Remove button.
        Returns:
        the button
        Since:
        3.5
      • getUpButton

        protected Button getUpButton()
        Return the Up button.
        Returns:
        the button
        Since:
        3.5
      • getDownButton

        protected Button getDownButton()
        Return the Down button.
        Returns:
        the button
        Since:
        3.5
      • getList

        protected List getList()
        Return the List.
        Returns:
        the list
        Since:
        3.5