com.webobjects.eointerface.cocoa
Class EOCocoaComboBoxPlugin

java.lang.Object
  com.webobjects.eointerface.EOWidgetAssociation.WidgetPlugin
      com.webobjects.eointerface.EOValueSelectionAssociation.ValueSelectionPlugin
          com.webobjects.eointerface.cocoa.EOCocoaComboBoxPlugin

All Implemented Interfaces:

EOWidgetAssociation.WidgetPlugin.Formatting, NSDisposable

public class EOCocoaComboBoxPlugin

extends EOValueSelectionAssociation.ValueSelectionPlugin

implements EOWidgetAssociation.WidgetPlugin.Formatting

EOCocoaComboBoxPlugin is used in Cocoa applications to connect combo boxes to value selection associations. This plugin handles setting the list of items in the combo box on behalf of its association and handles reporting the selection index to its association. You can populate the combo box list by hand in Interface Builder. In that case, do not bind the titles aspect of this plugin's association. When the user changes the selection of the combo box in the interface, this plugin invokes its association's widgetSelectionDidChange method.

Object Keys Taken: target, action

When the user chooses an item in the display object, the EOValueSelectionAssociation updates the selected object's property with the item's title, tag, or object.

Usage:
Association classes: EOValueSelectionAssociation
Widget classes: NSComboBox

Nested Class Summary

Nested classes inherited from class com.webobjects.eointerface.EOWidgetAssociation.WidgetPlugin

EOWidgetAssociation.WidgetPlugin.Formatting

Field Summary

Fields inherited from class com.webobjects.eointerface.EOValueSelectionAssociation.ValueSelectionPlugin

NoSelection

Constructor Summary

EOCocoaComboBoxPlugin(EOWidgetAssociation association, Object widget)
Creates a new EOCocoaComboBoxPlugin for use with association and widget.

Method Summary

void	breakConnection() Tells the plugin to halt communication with its NSComboBox object.
void	establishConnection() Establishes a connection between the plugin and its UI widget.
int	selectionIndex()
void	setSelectionIndex(int selectionIndex, boolean enabled) Selects the item at selectionIndex in this plugin's comboBox list.
void	setTitlesFromObjects(Object[] objects) Sets the combo box list to the items of objects.
void	setValueFormatter(Object formatter) Sets the formatter used to format values in the interface.
String[]	titles() Returns a String array of titles that the plugin's widget currently displays Only invoked if EOAssociation.SelectedTitleAspect bound.
Object	valueFormatter() Returns the formatter object of the receiver.
String[]	widgetKeysTaken() Returns an array of Strings which represent outlet names in Interface Builder.

Methods inherited from class com.webobjects.eointerface.EOWidgetAssociation.WidgetPlugin

association, dispose, unacceptableAspects, widget

Methods inherited from class java.lang.Object

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

Constructor Detail

EOCocoaComboBoxPlugin

public EOCocoaComboBoxPlugin(EOWidgetAssociation association,
                             Object widget)

Creates a new EOCocoaComboBoxPlugin for use with association and widget.

Parameters:

association - EOValueSelectionAssociation for this plugin to communicate with

widget - the NSComboBox object for this plugin to manage

Method Detail

breakConnection

public void breakConnection()

Tells the plugin to halt communication with its NSComboBox object. This makes sure that actions from the NSComboBox don't get to this plugin.

Overrides:

breakConnection in class EOWidgetAssociation.WidgetPlugin

establishConnection

public void establishConnection()

Establishes a connection between the plugin and its UI widget. This makes sure that actions from the NSComboBox are sent to this plugin.

Overrides:

establishConnection in class EOWidgetAssociation.WidgetPlugin

selectionIndex

public int selectionIndex()

Specified by:

selectionIndex in class EOValueSelectionAssociation.ValueSelectionPlugin

Returns:

index of the item selected in this plugin's combo box list

setSelectionIndex

public void setSelectionIndex(int selectionIndex,
                              boolean enabled)

Selects the item at selectionIndex in this plugin's comboBox list.

Specified by:

setSelectionIndex in class EOValueSelectionAssociation.ValueSelectionPlugin

Parameters:

selectionIndex - index of the item to select in this plugin's combo box list

enabled - if true, the combo box is enabled in the interface; if false, the combo box is disabled and the user cannot change the combo box's selected item.

setTitlesFromObjects

public void setTitlesFromObjects(Object[] objects)

Sets the combo box list to the items of objects. This method is only invoked if EOAssociation.TitlesAspect bound in the plugin's association.

Specified by:

setTitlesFromObjects in class EOValueSelectionAssociation.ValueSelectionPlugin

Parameters:

objects - array of objects to use to populate the list of items in the plugin's combo box

setValueFormatter

public void setValueFormatter(Object formatter)

Sets the formatter used to format values in the interface. In Cocoa, formatters should be set on the combo box in your nib file using Interface Builder.

Specified by:

setValueFormatter in interface EOWidgetAssociation.WidgetPlugin.Formatting

Parameters:

formatter - NSFormatter used to format values in the interface

titles

public String[] titles()

Description copied from class: EOValueSelectionAssociation.ValueSelectionPlugin

Returns a String array of titles that the plugin's widget currently displays Only invoked if EOAssociation.SelectedTitleAspect bound. Even if titles are derived from setTitlesFromObjects, returns the actual strings displayed

Specified by:

titles in class EOValueSelectionAssociation.ValueSelectionPlugin

Returns:

array of String objects displayed to the user in the combo box list

valueFormatter

public Object valueFormatter()

Description copied from interface: EOWidgetAssociation.WidgetPlugin.Formatting

Returns the formatter object of the receiver.

Specified by:

valueFormatter in interface EOWidgetAssociation.WidgetPlugin.Formatting

Returns:

NSFormatter used to format values in the interface

widgetKeysTaken

public String[] widgetKeysTaken()

Returns an array of Strings which represent outlet names in Interface Builder. These outlets are disabled by Interface Builder once the combo box is connected to this plugin's association.

EOCocoaComboBoxPlugin takes over outlets with keys "delegate" and "dataSource".

Overrides:

widgetKeysTaken in class EOWidgetAssociation.WidgetPlugin

Returns:

String array of outlet names