GeezerVison

The World Wide Web, restored to 800 pixels of glory.

GeezerVison is showing docs.wxpython.org — wx.ListBox — wxPython 4.3.2 Docs

wx.ListBox¶

A listbox is used to select one or more of a list of strings.

The strings are displayed in a scrolling box, with the selected string(s) marked in reverse video. A listbox can be single selection (if an item is selected, the previous selection is removed) or multiple selection (clicking an item toggles the item on or off independently of other selections).

List box elements are numbered from zero and while the maximal number of elements is unlimited, it is usually better to use a virtual control, not requiring to add all the items to it at once, such as wx.dataview.DataViewCtrl or wx.ListCtrl with LC_VIRTUAL style, once more than a few hundreds items need to be displayed because this control is not optimized, neither from performance nor from user interface point of view, for large number of items.

Notice that the list box doesn’t support control characters other than TAB .

Window Styles¶

This class supports the following styles:

wx.LB_SINGLE: Single-selection list.
wx.LB_MULTIPLE: Multiple-selection list: the user can toggle multiple items on and off. This is the same as wx.LB_EXTENDED in wxGTK2 port.
wx.LB_EXTENDED: Extended-selection list: the user can extend the selection by using SHIFT or CTRL keys together with the cursor movement keys or the mouse.
wx.LB_HSCROLL: Create horizontal scrollbar if contents are too wide (Windows only).
wx.LB_ALWAYS_SB: Always show a vertical scrollbar.
wx.LB_NEEDED_SB: Only create a vertical scrollbar if needed.
wx.LB_NO_SB: Don’t create vertical scrollbar (wxMSW and wxGTK only).
wx.LB_SORT: The listbox contents are sorted in alphabetical order.

Note that: LB_SINGLE , LB_MULTIPLE and LB_EXTENDED styles are mutually exclusive and you can specify at most one of them (single selection is the default). See also Window Styles.

Events Emitted by this Class¶

Handlers bound for the following event types will receive a wx.CommandEvent parameter.

EVT_LISTBOX: Process a wxEVT_LISTBOX event, when an item on the list is selected or the selection changes.
EVT_LISTBOX_DCLICK: Process a wxEVT_LISTBOX_DCLICK event, when the listbox is double-clicked. On some platforms (notably wxGTK2) pressing the enter key is handled as an equivalent of a double-click.

Class Hierarchy¶

Inheritance diagram for class ListBox:

Control Appearance¶

Known Subclasses¶

wx.CheckListBox

Methods Summary¶

`__init__`	Default constructor.
`Create`	Creates the listbox for two-step construction.
`Deselect`	Deselects an item in the list box.
`EnsureVisible`	Ensure that the item with the given index is currently shown.
`FindString`	Finds an item whose label matches the given string.
`GetClassDefaultAttributes`
`GetCount`	Returns the number of items in the control.
`GetCountPerPage`	Return the number of items that can fit vertically in the visible area of the listbox.
`GetSelection`	Returns the index of the selected item or `NOT_FOUND` if no item is selected.
`GetSelections`	Fill an array of ints with the positions of the currently selected items.
`GetString`	Returns the label of the item with the given index.
`GetTopItem`	Return the index of the topmost visible item.
`HasMultipleSelection`	return `True` if the listbox allows multiple selection
`HitTest`	Returns the item located at point, or `NOT_FOUND` if there is no item located at point.
`InsertItems`	Insert the given number of strings before the specified position.
`IsSelected`	Determines whether an item is selected.
`IsSorted`	Return `True` if the listbox has `LB_SORT` style.
`MSWSetTabStops`
`SetFirstItem`	Set the specified item to be the first visible item.
`SetItemBackgroundColour`	Set the background colour of an item in the ListBox.
`SetItemFont`	Set the font of an item in the ListBox.
`SetItemForegroundColour`	Set the foreground colour of an item in the ListBox.
`SetSelection`	Sets the selection to the given item n or removes the selection entirely if n == `NOT_FOUND` .
`SetString`	Sets the label for the given item.
`SetStringSelection`

Properties Summary¶

`Count`	See `GetCount`
`CountPerPage`	See `GetCountPerPage`
`Selection`	See `GetSelection` and `SetSelection`
`Selections`	See `GetSelections`
`TopItem`	See `GetTopItem`

Class API¶

class wx.ListBox(Control, ItemContainer)¶

Possible constructors:

ListBox() -> None

ListBox(parent, id=ID_ANY, pos=DefaultPosition, size=DefaultSize,
        choices=[], style=0, validator=DefaultValidator, name=ListBoxNameStr) ->
        None

A listbox is used to select one or more of a list of strings.

Methods¶

__init__(self, *args, **kw)¶

Overloaded Implementations:

__init__ (self)

Default constructor.

Return type:: None

__init__ (self, parent, id=ID_ANY, pos=DefaultPosition, size=DefaultSize, choices=[], style=0, validator=DefaultValidator, name=ListBoxNameStr)

Constructor, creating and showing a list box.

See the other wx.ListBox constructor; the only difference is that this overload takes a list of strings instead of a pointer to an array of String .

Create(self, parent, id=ID_ANY, pos=DefaultPosition, size=DefaultSize, choices=[], style=0, validator=DefaultValidator, name=ListBoxNameStr)¶

Creates the listbox for two-step construction.

See wx.ListBox for further details.

Parameters:

parent (wx.Window)
id (wx.WindowID)
pos (wx.Point)
size (wx.Size)
choices (list of strings)
style (long)
validator (wx.Validator)
name (string)

Return type:

bool

Deselect(self, n)¶

Deselects an item in the list box.

Parameters:: n (int) – The zero-based item to deselect.
Return type:: None

Note

This applies to multiple selection listboxes only.

EnsureVisible(self, n)¶

Ensure that the item with the given index is currently shown.

This method scrolls the listbox only if necessary and doesn’t do anything if this item is already shown, unlike SetFirstItem .

Parameters:: n (int)
Return type:: None

FindString(self, string, caseSensitive=False)¶

Finds an item whose label matches the given string.

Parameters:

string (string) – String to find.
caseSensitive (bool) – Whether search is case sensitive (default is not).

Return type:

int

Returns:

The zero-based position of the item, or wx.NOT_FOUND if the string was not found.

static GetClassDefaultAttributes(variant=WINDOW_VARIANT_NORMAL)¶

Parameters:: variant (WindowVariant)
Return type:: wx.VisualAttributes

GetCount(self)¶

Returns the number of items in the control.

Return type:: int

See also

IsEmpty

GetCountPerPage(self)¶

Return the number of items that can fit vertically in the visible area of the listbox.

Returns -1 if the number of items per page couldn’t be determined. On wxGTK this method can only determine the number of items per page if there is at least one item in the listbox.

Return type:: int

Added in version 4.1/wxWidgets-3.1.0.

GetSelection(self)¶

Returns the index of the selected item or NOT_FOUND if no item is selected.

Return type:: int
Returns:: The position of the current selection.

Note

This method can be used with single selection list boxes only, you must use wx.ListBox.GetSelections for the list boxes with wx.LB_MULTIPLE style.

See also

SetSelection , GetStringSelection

GetSelections(self)¶

Fill an array of ints with the positions of the currently selected items.

Return type:: List[int]

GetString(self, n)¶

Returns the label of the item with the given index.

The index must be valid, i.e. less than the value returned by GetCount , otherwise an assert is triggered. Notably, this function can’t be called if the control is empty.

Parameters:: n (int) – The zero-based index.
Return type:: str
Returns:: The label of the item.

GetTopItem(self)¶

Return the index of the topmost visible item.

Returns NOT_FOUND if the method is not implemented for the current platform.

Return type:: int

Added in version 4.1/wxWidgets-3.1.0.

HasMultipleSelection(self)¶

return True if the listbox allows multiple selection

Return type:: bool

HitTest(self, *args, **kw)¶

Overloaded Implementations:

HitTest (self, point)

Returns the item located at point, or NOT_FOUND if there is no item located at point.

It is currently implemented for wxMSW, Mac and wxGTK2 ports.

Parameters:: point (wx.Point) – Point of item (in client coordinates) to obtain
Return type:: int
Returns:: Item located at point, or wx.NOT_FOUND if unimplemented or the item does not exist.

Added in version 2.7.0.

HitTest (self, x, y)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

x (int)
y (int)

Return type:

int

InsertItems(self, items, pos)¶

Insert the given number of strings before the specified position.

Parameters:

items (list of strings) – Labels of items to be inserted
pos (int) – Position before which to insert the items: if pos is 0 the items will be inserted in the beginning of the listbox

Return type:

None

IsSelected(self, n)¶

Determines whether an item is selected.

Parameters:: n (int) – The zero-based item index.
Return type:: bool
Returns:: True if the given item is selected, False otherwise.

IsSorted(self)¶

Return True if the listbox has LB_SORT style.

This method is mostly meant for internal use only.

Return type:: bool

MSWSetTabStops(self, tabStops)¶

Return type:: None

SetFirstItem(self, *args, **kw)¶

Overloaded Implementations:

SetFirstItem (self, n)

Set the specified item to be the first visible item.

Parameters:: n (int) – The zero-based item index that should be visible.
Return type:: None

SetFirstItem (self, string)

Set the specified item to be the first visible item.

Parameters:: string (string) – The string that should be visible.
Return type:: None

SetItemBackgroundColour(self, item, c)¶

Set the background colour of an item in the ListBox. Only valid on MSW and if the wx.LB_OWNERDRAW flag is set.

Return type:: None

SetItemFont(self, item, f)¶

Set the font of an item in the ListBox. Only valid on MSW and if the wx.LB_OWNERDRAW flag is set.

Return type:: None

SetItemForegroundColour(self, item, c)¶

Set the foreground colour of an item in the ListBox. Only valid on MSW and if the wx.LB_OWNERDRAW flag is set.

Return type:: None

SetSelection(self, n)¶

Sets the selection to the given item n or removes the selection entirely if n == NOT_FOUND .

Note that this does not cause any command events to be emitted nor does it deselect any other items in the controls which support multiple selections.

Parameters:: n (int) – The string position to select, starting from zero.
Return type:: None

See also

SetString , SetStringSelection

SetString(self, n, string)¶

Sets the label for the given item.

Parameters:

n (int) – The zero-based item index.
string (string) – The label to set.

Return type:

None

SetStringSelection(self, *args, **kw)¶

Overloaded Implementations:

SetStringSelection (self, s, select)

Parameters:

s (string)
select (bool)

Return type:

bool

SetStringSelection (self, s)

Parameters:: s (string)
Return type:: bool

Properties¶

Count¶: See GetCount

CountPerPage¶: See GetCountPerPage

Selection¶: See GetSelection and SetSelection

Selections¶: See GetSelections

TopItem¶: See GetTopItem

You are visitor 01402503 — GeezerVison does not store the pages you look up.
Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.