Crazy Eddies GUI System  0.7.6
Public Member Functions | Static Public Attributes | Protected Member Functions | Protected Attributes
CEGUI::Combobox Class Reference

Base class for the Combobox widget. More...

+ Inheritance diagram for CEGUI::Combobox:
+ Collaboration diagram for CEGUI::Combobox:

List of all members.

Public Member Functions

bool isHit (const Vector2 &position, const bool allow_disabled=false) const
 check if the given pixel position would hit this window.
bool getSingleClickEnabled (void) const
 returns the mode of operation for the combo box.
bool isDropDownListVisible (void) const
 returns true if the drop down list is visible.
EditboxgetEditbox () const
 Return a pointer to the Editbox component widget for this Combobox.
PushButtongetPushButton () const
 Return a pointer to the PushButton component widget for this Combobox.
ComboDropListgetDropList () const
 Return a pointer to the ComboDropList component widget for this Combobox.
bool hasInputFocus (void) const
 return true if the Editbox has input focus.
bool isReadOnly (void) const
 return true if the Editbox is read-only.
bool isTextValid (void) const
 return true if the Editbox text is valid given the currently set validation string.
const StringgetValidationString (void) const
 return the currently set validation string
size_t getCaratIndex (void) const
 return the current position of the carat.
size_t getSelectionStartIndex (void) const
 return the current selection start point.
size_t getSelectionEndIndex (void) const
 return the current selection end point.
size_t getSelectionLength (void) const
 return the length of the current selection (in code points / characters).
size_t getMaxTextLength (void) const
 return the maximum text length set for this Editbox.
size_t getItemCount (void) const
 Return number of items attached to the list box.
ListboxItemgetSelectedItem (void) const
 Return a pointer to the currently selected item.
ListboxItemgetListboxItemFromIndex (size_t index) const
 Return the item at index position index.
size_t getItemIndex (const ListboxItem *item) const
 Return the index of ListboxItem item.
bool isSortEnabled (void) const
 return whether list sorting is enabled
bool isItemSelected (size_t index) const
 return whether the string at index position index is selected
ListboxItemfindItemWithText (const String &text, const ListboxItem *start_item)
 Search the list for an item with the specified text.
bool isListboxItemInList (const ListboxItem *item) const
 Return whether the specified ListboxItem is in the List.
bool isVertScrollbarAlwaysShown (void) const
 Return whether the vertical scroll bar is always shown.
bool isHorzScrollbarAlwaysShown (void) const
 Return whether the horizontal scroll bar is always shown.
virtual void initialiseComponents (void)
 Initialise the Window based object ready for use.
void showDropList (void)
 Show the drop-down list.
void hideDropList (void)
 Hide the drop-down list.
void setSingleClickEnabled (bool setting)
 Set the mode of operation for the combo box.
void setReadOnly (bool setting)
 Specify whether the Editbox is read-only.
void setValidationString (const String &validation_string)
 Set the text validation string.
void setCaratIndex (size_t carat_pos)
 Set the current position of the carat.
void setSelection (size_t start_pos, size_t end_pos)
 Define the current selection for the Editbox.
void setMaxTextLength (size_t max_len)
 set the maximum text length for this Editbox.
void activateEditbox (void)
 Activate the edit box component of the Combobox.
void resetList (void)
 Remove all items from the list.
void addItem (ListboxItem *item)
 Add the given ListboxItem to the list.
void insertItem (ListboxItem *item, const ListboxItem *position)
 Insert an item into the list box after a specified item already in the list.
void removeItem (const ListboxItem *item)
 Removes the given item from the list box.
void clearAllSelections (void)
 Clear the selected state for all items.
void setSortingEnabled (bool setting)
 Set whether the list should be sorted.
void setShowVertScrollbar (bool setting)
 Set whether the vertical scroll bar should always be shown.
void setShowHorzScrollbar (bool setting)
 Set whether the horizontal scroll bar should always be shown.
void setItemSelectState (ListboxItem *item, bool state)
 Set the select state of an attached ListboxItem.
void setItemSelectState (size_t item_index, bool state)
 Set the select state of an attached ListboxItem.
void handleUpdatedListItemData (void)
 Causes the list box to update it's internal state after changes have been made to one or more attached ListboxItem objects.
 Combobox (const String &type, const String &name)
 Constructor for Combobox base class.
virtual ~Combobox (void)
 Destructor for Combobox base class.

Static Public Attributes

static const String EventNamespace
 Namespace for global events.
static const String WidgetTypeName
 Window factory name.
static const String EventReadOnlyModeChanged
static const String EventValidationStringChanged
static const String EventMaximumTextLengthChanged
static const String EventTextInvalidated
static const String EventInvalidEntryAttempted
static const String EventCaratMoved
static const String EventTextSelectionChanged
static const String EventEditboxFull
static const String EventTextAccepted
static const String EventListContentsChanged
static const String EventListSelectionChanged
static const String EventSortModeChanged
static const String EventVertScrollbarModeChanged
static const String EventHorzScrollbarModeChanged
static const String EventDropListDisplayed
static const String EventDropListRemoved
static const String EventListSelectionAccepted
static const String EditboxNameSuffix
 Widget name suffix for the editbox component.
static const String DropListNameSuffix
 Widget name suffix for the drop list component.
static const String ButtonNameSuffix
 Widget name suffix for the button component.

Protected Member Functions

bool button_PressHandler (const EventArgs &e)
 Handler function for button clicks.
bool droplist_SelectionAcceptedHandler (const EventArgs &e)
 Handler for selections made in the drop-list.
bool droplist_HiddenHandler (const EventArgs &e)
 Handler for when drop-list hides itself.
bool editbox_MouseDownHandler (const EventArgs &e)
 Mouse button down handler attached to edit box.
virtual bool testClassName_impl (const String &class_name) const
 Return whether this window was inherited from the given class name at some point in the inheritance hierarchy.
void itemSelectChangeTextUpdate (const ListboxItem *const item, bool new_state, bool old_state)
 Update the Combobox text to reflect programmatically made changes to selected list item.
bool editbox_ReadOnlyChangedHandler (const EventArgs &e)
bool editbox_ValidationStringChangedHandler (const EventArgs &e)
bool editbox_MaximumTextLengthChangedHandler (const EventArgs &e)
bool editbox_TextInvalidatedEventHandler (const EventArgs &e)
bool editbox_InvalidEntryAttemptedHandler (const EventArgs &e)
bool editbox_CaratMovedHandler (const EventArgs &e)
bool editbox_TextSelectionChangedHandler (const EventArgs &e)
bool editbox_EditboxFullEventHandler (const EventArgs &e)
bool editbox_TextAcceptedEventHandler (const EventArgs &e)
bool editbox_TextChangedEventHandler (const EventArgs &e)
bool listbox_ListContentsChangedHandler (const EventArgs &e)
bool listbox_ListSelectionChangedHandler (const EventArgs &e)
bool listbox_SortModeChangedHandler (const EventArgs &e)
bool listbox_VertScrollModeChangedHandler (const EventArgs &e)
bool listbox_HorzScrollModeChangedHandler (const EventArgs &e)
virtual void onReadOnlyChanged (WindowEventArgs &e)
 Handler called internally when the read only state of the Combobox's Editbox has been changed.
virtual void onValidationStringChanged (WindowEventArgs &e)
 Handler called internally when the Combobox's Editbox validation string has been changed.
virtual void onMaximumTextLengthChanged (WindowEventArgs &e)
 Handler called internally when the Combobox's Editbox maximum text length is changed.
virtual void onTextInvalidatedEvent (WindowEventArgs &e)
 Handler called internally when the Combobox's Editbox text has been invalidated.
virtual void onInvalidEntryAttempted (WindowEventArgs &e)
 Handler called internally when an invalid entry was attempted in the Combobox's Editbox.
virtual void onCaratMoved (WindowEventArgs &e)
 Handler called internally when the carat in the Comboxbox's Editbox moves.
virtual void onTextSelectionChanged (WindowEventArgs &e)
 Handler called internally when the selection within the Combobox's Editbox changes.
virtual void onEditboxFullEvent (WindowEventArgs &e)
 Handler called internally when the maximum length is reached for text in the Combobox's Editbox.
virtual void onTextAcceptedEvent (WindowEventArgs &e)
 Handler called internally when the text in the Combobox's Editbox is accepted (by various means).
virtual void onListContentsChanged (WindowEventArgs &e)
 Handler called internally when the Combobox's Drop-down list contents are changed.
virtual void onListSelectionChanged (WindowEventArgs &e)
 Handler called internally when the selection within the Combobox's drop-down list changes (this is not the 'final' accepted selection, just the currently highlighted item).
virtual void onSortModeChanged (WindowEventArgs &e)
 Handler called fired internally when the sort mode for the Combobox's drop-down list is changed.
virtual void onVertScrollbarModeChanged (WindowEventArgs &e)
 Handler called internally when the 'force' setting for the vertical scrollbar within the Combobox's drop-down list is changed.
virtual void onHorzScrollbarModeChanged (WindowEventArgs &e)
 Handler called internally when the 'force' setting for the horizontal scrollbar within the Combobox's drop-down list is changed.
virtual void onDropListDisplayed (WindowEventArgs &e)
 Handler called internally when the Combobox's drop-down list has been displayed.
virtual void onDroplistRemoved (WindowEventArgs &e)
 Handler called internally when the Combobox's drop-down list has been hidden.
virtual void onListSelectionAccepted (WindowEventArgs &e)
 Handler called internally when the user has confirmed a selection within the Combobox's drop-down list.
virtual void onFontChanged (WindowEventArgs &e)
 Handler called when the window's font is changed.
virtual void onTextChanged (WindowEventArgs &e)
 Handler called when the window's text is changed.
virtual void onActivated (ActivationEventArgs &e)
 Handler called when this window has become the active window.

Protected Attributes

bool d_singleClickOperation
 true if user can show and select from list in a single click.

Detailed Description

Base class for the Combobox widget.


Member Function Documentation

Activate the edit box component of the Combobox.

Returns:
Nothing.

Add the given ListboxItem to the list.

Parameters:
itemPointer to the ListboxItem to be added to the list. Note that it is the passed object that is added to the list, a copy is not made. If this parameter is NULL, nothing happens.
Returns:
Nothing.

Clear the selected state for all items.

Returns:
Nothing.
ListboxItem* CEGUI::Combobox::findItemWithText ( const String text,
const ListboxItem start_item 
)

Search the list for an item with the specified text.

Parameters:
textString object containing the text to be searched for.
start_itemListboxItem where the search is to begin, the search will not include item. If item is NULL, the search will begin from the first item in the list.
Returns:
Pointer to the first ListboxItem in the list after item that has text matching text. If no item matches the criteria NULL is returned.
Exceptions:
InvalidRequestExceptionthrown if item is not attached to this list box.
size_t CEGUI::Combobox::getCaratIndex ( void  ) const

return the current position of the carat.

Returns:
Index of the insert carat relative to the start of the text.

Return a pointer to the ComboDropList component widget for this Combobox.

Returns:
Pointer to an ComboDropList object.
Exceptions:
UnknownObjectExceptionThrown if the ComboDropList component does not exist.

Return a pointer to the Editbox component widget for this Combobox.

Returns:
Pointer to an Editbox object.
Exceptions:
UnknownObjectExceptionThrown if the Editbox component does not exist.
size_t CEGUI::Combobox::getItemCount ( void  ) const

Return number of items attached to the list box.

Returns:
the number of items currently attached to this list box.
size_t CEGUI::Combobox::getItemIndex ( const ListboxItem item) const

Return the index of ListboxItem item.

Parameters:
itemPointer to a ListboxItem whos zero based index is to be returned.
Returns:
Zero based index indicating the position of ListboxItem item in the list box.
Exceptions:
InvalidRequestExceptionthrown if item is not attached to this list box.

Return the item at index position index.

Parameters:
indexZero based index of the item to be returned.
Returns:
Pointer to the ListboxItem at index position index in the list box.
Exceptions:
InvalidRequestExceptionthrown if index is out of range.
size_t CEGUI::Combobox::getMaxTextLength ( void  ) const

return the maximum text length set for this Editbox.

Returns:
The maximum number of code points (characters) that can be entered into this Editbox.
Note:
Depending on the validation string set, the actual length of text that can be entered may be less than the value returned here (it will never be more).

Return a pointer to the PushButton component widget for this Combobox.

Returns:
Pointer to a PushButton object.
Exceptions:
UnknownObjectExceptionThrown if the PushButton component does not exist.

Return a pointer to the currently selected item.

Returns:
Pointer to a ListboxItem based object that is the selected item in the list. will return NULL if no item is selected.
size_t CEGUI::Combobox::getSelectionEndIndex ( void  ) const

return the current selection end point.

Returns:
Index of the selection end point relative to the start of the text. If no selection is defined this function returns the position of the carat.
size_t CEGUI::Combobox::getSelectionLength ( void  ) const

return the length of the current selection (in code points / characters).

Returns:
Number of code points (or characters) contained within the currently defined selection.
size_t CEGUI::Combobox::getSelectionStartIndex ( void  ) const

return the current selection start point.

Returns:
Index of the selection start point relative to the start of the text. If no selection is defined this function returns the position of the carat.

returns the mode of operation for the combo box.

Returns:
  • true if the user can show the list and select an item with a single mouse click.
  • false if the user must click to show the list and then click again to select an item.

return the currently set validation string

Note:
Validation is performed by means of a regular expression. If the text matches the regex, the text is said to have passed validation. If the text does not match with the regex then the text fails validation.
Returns:
String object containing the current validation regex data

Causes the list box to update it's internal state after changes have been made to one or more attached ListboxItem objects.

    Client code must call this whenever it has made any changes to ListboxItem objects already attached to the
    list box.  If you are just adding items, or removed items to update them prior to re-adding them, there is
    no need to call this method.
Returns:
Nothing.
bool CEGUI::Combobox::hasInputFocus ( void  ) const

return true if the Editbox has input focus.

Returns:
true if the Editbox has keyboard input focus, false if the Editbox does not have keyboard input focus.

Hide the drop-down list.

Returns:
Nothing.
virtual void CEGUI::Combobox::initialiseComponents ( void  ) [virtual]

Initialise the Window based object ready for use.

Note:
This must be called for every window created. Normally this is handled automatically by the WindowFactory for each Window type.
Returns:
Nothing

Reimplemented from CEGUI::Window.

void CEGUI::Combobox::insertItem ( ListboxItem item,
const ListboxItem position 
)

Insert an item into the list box after a specified item already in the list.

    Note that if the list is sorted, the item may not end up in the requested position.
Parameters:
itemPointer to the ListboxItem to be inserted. Note that it is the passed object that is added to the list, a copy is not made. If this parameter is NULL, nothing happens.
positionPointer to a ListboxItem that item is to be inserted after. If this parameter is NULL, the item is inserted at the start of the list.
Returns:
Nothing.

returns true if the drop down list is visible.

Returns:
true if the drop down list is visible, false otherwise.
bool CEGUI::Combobox::isHit ( const Vector2 position,
const bool  allow_disabled = false 
) const [virtual]

check if the given pixel position would hit this window.

Parameters:
positionVector2 object describing the position to check. The position describes a pixel offset from the top-left corner of the display.
allow_disabled
  • true specifies that the window may be 'hit' if it is disabled.
  • false specifies that the window may only be hit if it is enabled.
Returns:
  • true if position hits this Window.
  • false if position does not hit this window.

Reimplemented from CEGUI::Window.

Return whether the horizontal scroll bar is always shown.

Returns:
  • true if the scroll bar will always be shown even if it is not required.
  • false if the scroll bar will only be shown when it is required.
bool CEGUI::Combobox::isItemSelected ( size_t  index) const

return whether the string at index position index is selected

Parameters:
indexZero based index of the item to be examined.
Returns:
true if the item at index is selected, false if the item at index is not selected.
Exceptions:
InvalidRequestExceptionthrown if index is out of range.
bool CEGUI::Combobox::isListboxItemInList ( const ListboxItem item) const

Return whether the specified ListboxItem is in the List.

Returns:
true if ListboxItem item is in the list, false if ListboxItem item is not in the list.
bool CEGUI::Combobox::isReadOnly ( void  ) const

return true if the Editbox is read-only.

Returns:
true if the Editbox is read only and can't be edited by the user, false if the Editbox is not read only and may be edited by the user.
bool CEGUI::Combobox::isSortEnabled ( void  ) const

return whether list sorting is enabled

Returns:
true if the list is sorted, false if the list is not sorted
bool CEGUI::Combobox::isTextValid ( void  ) const

return true if the Editbox text is valid given the currently set validation string.

Note:
It is possible to programmatically set 'invalid' text for the Editbox by calling setText. This has certain implications since if invalid text is set, whatever the user types into the box will be rejected when the input is validated.
Validation is performed by means of a regular expression. If the text matches the regex, the text is said to have passed validation. If the text does not match with the regex then the text fails validation.
Returns:
true if the current Editbox text passes validation, false if the text does not pass validation.

Return whether the vertical scroll bar is always shown.

Returns:
  • true if the scroll bar will always be shown even if it is not required.
  • false if the scroll bar will only be shown when it is required.
virtual void CEGUI::Combobox::onActivated ( ActivationEventArgs e) [protected, virtual]

Handler called when this window has become the active window.

Parameters:
eActivationEventArgs class whose 'otherWindow' field is set to the window that previously was active, or NULL for none.

Reimplemented from CEGUI::Window.

virtual void CEGUI::Combobox::onFontChanged ( WindowEventArgs e) [protected, virtual]

Handler called when the window's font is changed.

Parameters:
eWindowEventArgs object whose 'window' pointer field is set to the window that triggered the event. For this event the trigger window is always 'this'.

Reimplemented from CEGUI::Window.

virtual void CEGUI::Combobox::onTextChanged ( WindowEventArgs e) [protected, virtual]

Handler called when the window's text is changed.

Parameters:
eWindowEventArgs object whose 'window' pointer field is set to the window that triggered the event. For this event the trigger window is always 'this'.

Reimplemented from CEGUI::Window.

void CEGUI::Combobox::removeItem ( const ListboxItem item)

Removes the given item from the list box.

Parameters:
itemPointer to the ListboxItem that is to be removed. If item is not attached to this list box then nothing will happen.
Returns:
Nothing.
void CEGUI::Combobox::resetList ( void  )

Remove all items from the list.

Note that this will cause 'AutoDelete' items to be deleted.

void CEGUI::Combobox::setCaratIndex ( size_t  carat_pos)

Set the current position of the carat.

Parameters:
carat_posNew index for the insert carat relative to the start of the text. If the value specified is greater than the number of characters in the Editbox, the carat is positioned at the end of the text.
Returns:
Nothing.
void CEGUI::Combobox::setItemSelectState ( ListboxItem item,
bool  state 
)

Set the select state of an attached ListboxItem.

    This is the recommended way of selecting and deselecting items attached to a list box as it respects the
    multi-select mode setting.  It is possible to modify the setting on ListboxItems directly, but that approach
    does not respect the settings of the list box.
Parameters:
itemThe ListboxItem to be affected. This item must be attached to the list box.
statetrue to select the item, false to de-select the item.
Returns:
Nothing.
Exceptions:
InvalidRequestExceptionthrown if item is not attached to this list box.
void CEGUI::Combobox::setItemSelectState ( size_t  item_index,
bool  state 
)

Set the select state of an attached ListboxItem.

    This is the recommended way of selecting and deselecting items attached to a list box as it respects the
    multi-select mode setting.  It is possible to modify the setting on ListboxItems directly, but that approach
    does not respect the settings of the list box.
Parameters:
item_indexThe zero based index of the ListboxItem to be affected. This must be a valid index (0 <= index < getItemCount())
statetrue to select the item, false to de-select the item.
Returns:
Nothing.
Exceptions:
InvalidRequestExceptionthrown if item_index is out of range for the list box
void CEGUI::Combobox::setMaxTextLength ( size_t  max_len)

set the maximum text length for this Editbox.

Parameters:
max_lenThe maximum number of code points (characters) that can be entered into this Editbox.
Note:
Depending on the validation string set, the actual length of text that can be entered may be less than the value set here (it will never be more).
Returns:
Nothing.
void CEGUI::Combobox::setReadOnly ( bool  setting)

Specify whether the Editbox is read-only.

Parameters:
settingtrue if the Editbox is read only and can't be edited by the user, false if the Editbox is not read only and may be edited by the user.
Returns:
Nothing.
void CEGUI::Combobox::setSelection ( size_t  start_pos,
size_t  end_pos 
)

Define the current selection for the Editbox.

Parameters:
start_posIndex of the starting point for the selection. If this value is greater than the number of characters in the Editbox, the selection start will be set to the end of the text.
end_posIndex of the ending point for the selection. If this value is greater than the number of characters in the Editbox, the selection start will be set to the end of the text.
Returns:
Nothing.
void CEGUI::Combobox::setShowHorzScrollbar ( bool  setting)

Set whether the horizontal scroll bar should always be shown.

Parameters:
settingtrue if the horizontal scroll bar should be shown even when it is not required. false if the horizontal scroll bar should only be shown when it is required.
Returns:
Nothing.
void CEGUI::Combobox::setShowVertScrollbar ( bool  setting)

Set whether the vertical scroll bar should always be shown.

Parameters:
settingtrue if the vertical scroll bar should be shown even when it is not required. false if the vertical scroll bar should only be shown when it is required.
Returns:
Nothing.

Set the mode of operation for the combo box.

Parameters:
setting
  • true if the user should be able to show the list and select an item with a single mouse click.
  • false if the user must click to show the list and then click again to select an item.
Returns:
Nothing.
void CEGUI::Combobox::setSortingEnabled ( bool  setting)

Set whether the list should be sorted.

Parameters:
settingtrue if the list should be sorted, false if the list should not be sorted.
Returns:
Nothing.
void CEGUI::Combobox::setValidationString ( const String validation_string)

Set the text validation string.

Note:
Validation is performed by means of a regular expression. If the text matches the regex, the text is said to have passed validation. If the text does not match with the regex then the text fails validation.
Parameters:
validation_stringString object containing the validation regex data to be used.
Returns:
Nothing.

Show the drop-down list.

Returns:
Nothing
virtual bool CEGUI::Combobox::testClassName_impl ( const String class_name) const [inline, protected, virtual]

Return whether this window was inherited from the given class name at some point in the inheritance hierarchy.

Parameters:
class_nameThe class name that is to be checked.
Returns:
true if this window was inherited from class_name. false if not.

Reimplemented from CEGUI::Window.

References CEGUI::Window::testClassName_impl().


Member Data Documentation

Event fired when the edit box text insertion position is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose caret position has been changed.

Event fired when the drop-down list is displayed Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose drop down list has been displayed.

Event fired when the drop-down list is removed / hidden. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose drop down list has been hidden.

Event fired when the number of characters in the edit box has reached the currently set maximum. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose edit box has become full.

Event fired when the horizontal scroll bar 'force' setting for the list is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose horizontal scroll bar setting has been changed.

Event fired when the user attempts to modify the edit box text in a way that would make it invalid. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox in which the user's input would have invalidated the text.

Event fired when the contents of the list is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose list content has changed.

Event fired when the user accepts a selection from the drop-down list Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox in which the user has confirmed a selection from the drop down list.

Event fired when there is a change to the currently selected item in the list. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose currently selected list item has changed.

Event fired when the maximum string length is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose maximum edit box string length has been changed.

Event fired when the read-only mode for the edit box is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose read only mode has been changed.

Event fired when the sort mode setting of the list is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose list sorting mode has been changed.

Event fired when the user accepts the current edit box text by pressing Return, Enter, or Tab. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose edit box text has been accepted / confirmed by the user.

Event fired when an operation has made the current edit box text invalid as regards to the current validation string. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose edit box text has become invalid.

Event fired when the current edit box text selection is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose edit box text selection has been changed.

Event fired when the edix box validation string is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose validation string was changed.

Event fired when the vertical scroll bar 'force' setting for the list is changed. Handlers are passed a const WindowEventArgs reference with WindowEventArgs::window set to the Combobox whose vertical scroll bar setting is changed.