Combo box widget. More...

#include <TGUI/Widgets/ComboBox.hpp>

Inheritance diagram for tgui::ComboBox:

Public Types
enum class	ExpandDirection { Down , Up , Automatic }
	The side where the list will be displayed. More...

using	Ptr = std::shared_ptr<ComboBox>
	Shared widget pointer.

using	ConstPtr = std::shared_ptr<const ComboBox>
	Shared constant widget pointer.

Public Types inherited from tgui::Widget
using	Ptr = std::shared_ptr<Widget>
	Shared widget pointer.

using	ConstPtr = std::shared_ptr<const Widget>
	Shared constant widget pointer.

Public Member Functions
	ComboBox (const char *typeName=StaticWidgetType, bool initRenderer=true)

	ComboBox (const ComboBox &other)

	ComboBox (ComboBox &&other) noexcept

ComboBox &	operator= (const ComboBox &other)

ComboBox &	operator= (ComboBox &&other) noexcept

TGUI_NODISCARD ComboBoxRenderer *	getSharedRenderer () override
	Returns the renderer, which gives access to functions that determine how the widget is displayed.

TGUI_NODISCARD const ComboBoxRenderer *	getSharedRenderer () const override

TGUI_NODISCARD TGUI_NODISCARD ComboBoxRenderer *	getRenderer () override
	Returns the renderer, which gives access to functions that determine how the widget is displayed.

void	setSize (const Layout2d &size) override
	Changes the size of the combo box.

void	setEnabled (bool enabled) override
	Enables or disables the widget.

void	setItemsToDisplay (std::size_t nrOfItemsInListToDisplay)
	Changes the number of items that are displayed in the list.

TGUI_NODISCARD std::size_t	getItemsToDisplay () const
	Returns the number of items that are displayed in the list.

std::size_t	addItem (const String &itemName, const String &id="")
	Adds an item to the list, so that it can be selected later.

bool	setSelectedItem (const String &itemName)
	Selects an item from the list.

bool	setSelectedItemById (const String &id)
	Selects an item from the list.

bool	setSelectedItemByIndex (std::size_t index)
	Selects an item in the list.

void	deselectItem ()
	Deselects the selected item.

bool	removeItem (const String &itemName)
	Removes the item from the list with the given name.

bool	removeItemById (const String &id)
	Removes the item that were added with the given id.

bool	removeItemByIndex (std::size_t index)
	Removes the item from the list.

void	removeAllItems ()
	Removes all items from the list.

TGUI_NODISCARD String	getItemById (const String &id) const
	Returns the item name of the item with the given id.

TGUI_NODISCARD String	getSelectedItem () const
	Returns the currently selected item.

TGUI_NODISCARD String	getSelectedItemId () const
	Gets the id of the selected item.

TGUI_NODISCARD int	getSelectedItemIndex () const
	Gets the index of the selected item.

bool	changeItem (const String &originalValue, const String &newValue)
	Changes an item with name originalValue to newValue.

bool	changeItemById (const String &id, const String &newValue)
	Changes the name of an item with the given id to newValue.

bool	changeItemByIndex (std::size_t index, const String &newValue)
	Changes the name of an item at the given index to newValue.

TGUI_NODISCARD std::size_t	getItemCount () const
	Returns the amount of items in the combo box.

TGUI_NODISCARD std::vector< String >	getItems () const
	Returns a copy of the items in the combo box.

TGUI_NODISCARD std::vector< String >	getItemIds () const
	Returns a copy of the item ids in the combo box.

void	setMaximumItems (std::size_t maximumItems=0)
	Changes the maximum items that the combo box can contain.

TGUI_NODISCARD std::size_t	getMaximumItems () const
	Returns the maximum items that the combo box can contain.

void	setDefaultText (const String &defaultText)
	Changes the default text of the combo box. This is the text drawn when no item is selected.

TGUI_NODISCARD const String &	getDefaultText () const
	Returns the default text of the combo box. This is the text drawn when no item is selected.

void	setExpandDirection (ExpandDirection direction)
	Changes the side where the list is displayed.

TGUI_NODISCARD ExpandDirection	getExpandDirection () const
	Returns the side where the list is displayed.

TGUI_NODISCARD bool	contains (const String &item) const
	Returns whether the combo box contains the given item.

TGUI_NODISCARD bool	containsId (const String &id) const
	Returns whether the combo box contains an item with the given id.

void	setChangeItemOnScroll (bool changeOnScroll)
	Changes whether the mouse wheel can be used to change the selected item while the list is closed.

TGUI_NODISCARD bool	getChangeItemOnScroll () const
	Returns whether the mouse wheel can be used to change the selected item while the list is closed.

void	setParent (Container *parent) override

TGUI_NODISCARD bool	isMouseOnWidget (Vector2f pos) const override
	Returns whether the mouse position (which is relative to the parent widget) lies on top of the widget.

bool	leftMousePressed (Vector2f pos) override
	Called by the parent when the left mouse button goes down on top of the widget.

bool	scrolled (float delta, Vector2f pos, bool touch) override
	Called by the parent on scroll event (either from mouse wheel of from two finger scrolling on a touchscreen)

void	draw (BackendRenderTarget &target, RenderStates states) const override
	Draw the widget to a render target.

virtual void	setSize (const Layout2d &size)
	Changes the size of the widget.

void	setSize (Layout width, Layout height)
	Changes the size of the widget.

Public Member Functions inherited from tgui::Widget
	Widget (const char *typeName, bool initRenderer)

	Widget (const Widget &)
	Copy constructor.

	Widget (Widget &&) noexcept
	Move constructor.

virtual	~Widget ()
	Destructor.

Widget &	operator= (const Widget &)
	Overload of copy assignment operator.

Widget &	operator= (Widget &&) noexcept
	Move assignment.

void	setRenderer (std::shared_ptr< RendererData > rendererData)
	Sets a new renderer for the widget. The renderer determines how the widget looks.

virtual void	setPosition (const Layout2d &position)
	sets the position of the widget

void	setPosition (Layout x, Layout y)
	Sets the position of the widget.

TGUI_NODISCARD Vector2f	getPosition () const
	Gets the position of the widget.

void	setSize (Layout width, Layout height)
	Changes the size of the widget.

void	setWidth (Layout width)
	Changes the width of the widget.

void	setHeight (Layout height)
	Changes the height of the widget.

TGUI_NODISCARD Vector2f	getSize () const
	Returns the size of the widget.

virtual TGUI_NODISCARD Vector2f	getFullSize () const
	Returns the entire size that the widget is using.

virtual TGUI_NODISCARD Vector2f	getAbsolutePosition (Vector2f offset={}) const
	Get the absolute position of the widget instead of the relative position to its parent.

virtual TGUI_NODISCARD Vector2f	getWidgetOffset () const
	Returns the distance between the position where the widget is drawn and where the widget is placed.

void	setAutoLayout (AutoLayout layout)
	Sets how the position is determined compared to the other widgets in the parent.

TGUI_NODISCARD AutoLayout	getAutoLayout () const
	Returns how the position is determined compared to the other widgets in the parent.

void	setOrigin (float x, float y)
	Sets the origin point on which the position, scale and rotation is based.

void	setOrigin (Vector2f origin)
	Sets the origin point on which the position, scale and rotation is based.

TGUI_NODISCARD Vector2f	getOrigin () const
	Returns the relative origin point on which the position, scale and rotation is based.

void	setScale (Vector2f scaleFactors)
	Sets the scaling to be applied to the widget.

void	setScale (Vector2f scaleFactors, Vector2f origin)
	Sets the scaling to be applied to the widget.

void	setScale (float scaleFactor)
	Sets the scaling to be applied to the widget.

void	setScale (float scaleFactor, Vector2f origin)
	Sets the scaling to be applied to the widget.

TGUI_NODISCARD Vector2f	getScale () const
	Returns the scaling to be applied to the widget.

TGUI_NODISCARD Vector2f	getScaleOrigin () const
	Returns the origin used for scaling.

void	setRotation (float angle)
	Sets the rotation to be applied to the widget.

void	setRotation (float angle, Vector2f origin)
	Sets the rotation to be applied to the widget.

TGUI_NODISCARD float	getRotation () const
	Returns the rotation to be applied to the widget.

TGUI_NODISCARD Vector2f	getRotationOrigin () const
	Returns the origin used for rotations.

void	showWithEffect (ShowEffectType type, Duration duration)
	Shows the widget by introducing it with an animation.

void	hideWithEffect (ShowEffectType type, Duration duration)
	Hides the widget by making it leave with an animation.

void	moveWithAnimation (Layout2d position, Duration duration)
	Moves the widget from its current position to the given position, over a given duration.

void	resizeWithAnimation (Layout2d size, Duration duration)
	Resizes the widget from its current size to the given size, over a given duration.

virtual void	setVisible (bool visible)
	Shows or hides a widget.

TGUI_NODISCARD bool	isVisible () const
	Returns true when the widget is visible.

TGUI_NODISCARD bool	isEnabled () const
	Returns true when the widget is enabled.

virtual void	setFocused (bool focused)
	Focus or unfocus the widget.

TGUI_NODISCARD bool	isFocused () const
	Returns true when the widget is focused and false otherwise.

TGUI_NODISCARD const String &	getWidgetType () const
	Returns the type of the widget.

TGUI_NODISCARD Container *	getParent () const
	Returns a pointer to the parent widget.

TGUI_NODISCARD BackendGui *	getParentGui () const
	Returns a pointer to the gui to which this widget belongs.

TGUI_NODISCARD bool	isAnimationPlaying () const
	Returns whether there is an active animation (started with showWithEffect or hideWithEffect)

void	moveToFront ()
	Places the widget before all other widgets.

void	moveToBack ()
	Places the widget behind all other widgets.

void	setUserData (Any userData)
	Stores some data into the widget.

template<typename DataType >
TGUI_NODISCARD DataType	getUserData () const
	Returns data stored in the widget.

TGUI_NODISCARD bool	hasUserData () const
	Returns whether data stored in the widget.

void	setInheritedFont (const Font &font)
	Sets the font of the widget that is used when no font is set in the renderer.

TGUI_NODISCARD const Font &	getInheritedFont () const
	Returns the font of the widget that is used when no font is set in the renderer.

void	setInheritedOpacity (float opacity)
	Sets the opacity of the widget that will be multiplied with the opacity set in the renderer.

TGUI_NODISCARD float	getInheritedOpacity () const
	Returns the opacity of the widget that is multiplied with the opacity set in the renderer.

void	setTextSize (unsigned int size)
	Changes the character size of text in this widget if it uses text.

TGUI_NODISCARD unsigned int	getTextSize () const
	Returns the character size of text in this widget.

void	setToolTip (Widget::Ptr toolTip)
	Sets the tool tip that should be displayed when hovering over the widget.

TGUI_NODISCARD Widget::Ptr	getToolTip () const
	Returns the tool tip that is displayed when hovering over the widget.

void	setWidgetName (const String &name)
	Changes the name of a widget.

TGUI_NODISCARD String	getWidgetName () const
	Returns the name of a widget.

void	setMouseCursor (Cursor::Type cursor)
	Changes which mouse cursor is shown when hovering over the widget.

TGUI_NODISCARD Cursor::Type	getMouseCursor () const
	Returns which mouse cursor is shown when hovering over the widget.

void	setFocusable (bool focusable)
	Changes whether a widget could be focused.

TGUI_NODISCARD bool	isFocusable () const
	Returns whether a widget could be focused.

void	setNavigationUp (const Widget::Ptr &widgetAbove)
	Changes which widget should become focused when navigating upwards from this widget.

TGUI_NODISCARD Widget::Ptr	getNavigationUp () const
	Returns which widget would become focused when navigating upwards from this widget.

void	setNavigationDown (const Widget::Ptr &widgetBelow)
	Changes which widget should become focused when navigating downwards from this widget.

TGUI_NODISCARD Widget::Ptr	getNavigationDown () const
	Returns which widget would become focused when navigating downwards from this widget.

void	setNavigationLeft (const Widget::Ptr &widgetLeft)
	Changes which widget should become focused when navigating to the left from this widget.

TGUI_NODISCARD Widget::Ptr	getNavigationLeft () const
	Returns which widget would become focused when navigating to the left from this widget.

void	setNavigationRight (const Widget::Ptr &widgetRight)
	Changes which widget should become focused when navigating to the right from this widget.

TGUI_NODISCARD Widget::Ptr	getNavigationRight () const
	Returns which widget would become focused when navigating to the right from this widget.

void	finishAllAnimations ()
	Makes all animations of the widget finish immediately.

virtual TGUI_NODISCARD bool	canGainFocus () const
	Returns whether the widget can currently gain focus.

TGUI_NODISCARD bool	isContainer () const
	Returns whether the widget is a container widget or not.

TGUI_NODISCARD bool	isMouseDown () const
	Returns whether the left mouse button has been pressed on top of the widget.

virtual bool	updateTime (Duration elapsedTime)

void	setAutoLayoutUpdateEnabled (bool enabled)

virtual void	leftMouseReleased (Vector2f pos)

virtual void	rightMousePressed (Vector2f pos)

virtual void	rightMouseReleased (Vector2f pos)

virtual void	mouseReleased (Event::MouseButton button, Vector2f pos)

virtual void	mouseMoved (Vector2f pos)

virtual void	keyPressed (const Event::KeyEvent &event)

virtual bool	canHandleKeyPress (const Event::KeyEvent &event)
	Called by the parent of the widget to check if keyPressed would process the event.

virtual void	textEntered (char32_t key)

virtual void	mouseNoLongerOnWidget ()

virtual void	leftMouseButtonNoLongerDown ()

virtual void	rightMouseButtonNoLongerDown ()

virtual TGUI_NODISCARD Widget::Ptr	askToolTip (Vector2f mousePos)

TGUI_NODISCARD const Layout2d &	getPositionLayout () const

TGUI_NODISCARD const Layout2d &	getSizeLayout () const

void	bindPositionLayout (Layout *layout)

void	unbindPositionLayout (Layout *layout)

void	bindSizeLayout (Layout *layout)

void	unbindSizeLayout (Layout *layout)

template<typename WidgetType >
TGUI_NODISCARD std::shared_ptr< const WidgetType >	cast () const
	Downcast const widget.

template<typename WidgetType >
TGUI_NODISCARD std::shared_ptr< WidgetType >	cast ()
	Downcast widget.

void	rendererChangedCallback (const String &property)

Static Public Member Functions
static TGUI_NODISCARD ComboBox::Ptr	create ()
	Creates a new combo box widget.

static TGUI_NODISCARD ComboBox::Ptr	copy (const ComboBox::ConstPtr &comboBox)
	Makes a copy of another combo box.

Public Attributes
SignalItem	onItemSelect = {"ItemSelected"}
	An item was selected in the combo box. Optional parameter: selected item or its index.

Public Attributes inherited from tgui::Widget
SignalVector2f	onPositionChange = {"PositionChanged"}
	The position of the widget changed. Optional parameter: new position.

SignalVector2f	onSizeChange = {"SizeChanged"}
	The size of the widget changed. Optional parameter: new size.

Signal	onFocus = {"Focused"}
	The widget was focused.

Signal	onUnfocus = {"Unfocused"}
	The widget was unfocused.

Signal	onMouseEnter = {"MouseEntered"}
	The mouse entered the widget.

Signal	onMouseLeave = {"MouseLeft"}
	The mouse left the widget.

SignalShowEffect	onShowEffectFinish = {"ShowEffectFinished"}
	A show or hide effect finished. Optional parameters: effect type, new widget visibility or both.

SignalAnimationType	onAnimationFinish = {"AnimationFinished"}
	An animation has finished.

Static Public Attributes
static constexpr const char	StaticWidgetType [] = "ComboBox"
	Type name of the widget.

Protected Member Functions
TGUI_NODISCARD Signal &	getSignal (String signalName) override
	Retrieves a signal based on its name.

void	rendererChanged (const String &property) override
	Function called when one of the properties of the renderer is changed.

TGUI_NODISCARD std::unique_ptr< DataIO::Node >	save (SavingRenderersMap &renderers) const override
	Saves the widget as a tree node in order to save it to a file.

void	load (const std::unique_ptr< DataIO::Node > &node, const LoadingRenderersMap &renderers) override
	Loads the widget from a tree of nodes.

void	updateTextSize () override
	Called when the text size is changed (either by setTextSize or via the renderer)

TGUI_NODISCARD Vector2f	getInnerSize () const

void	updateListBoxHeight ()

void	showListBox ()

void	hideListBox ()

void	initListBox ()

TGUI_NODISCARD Widget::Ptr	clone () const override
	Makes a copy of the widget if you don't know its exact type.

Protected Member Functions inherited from tgui::Widget
virtual void	mouseEnteredWidget ()
	This function is called when the mouse enters the widget.

virtual void	mouseLeftWidget ()
	This function is called when the mouse leaves the widget.

void	recalculateBoundPositionLayouts ()
	Calls recalculateValue() on each layout in m_boundPositionLayouts.

void	recalculateBoundSizeLayouts ()
	Calls recalculateValue() on each layout in m_boundSizeLayouts.

Protected Attributes
std::size_t	m_nrOfItemsToDisplay = 0

ListBox::Ptr	m_listBox = ListBox::create()

Text	m_text

Text	m_defaultText

int	m_previousSelectedItemIndex = -1

bool	m_changeItemOnScroll = false

ExpandDirection	m_expandDirection = ExpandDirection::Automatic

Sprite	m_spriteBackground

Sprite	m_spriteBackgroundDisabled

Sprite	m_spriteArrow

Sprite	m_spriteArrowHover

Sprite	m_spriteArrowDisabled

Borders	m_bordersCached

Padding	m_paddingCached

Color	m_borderColorCached

Color	m_backgroundColorCached

Color	m_backgroundColorDisabledCached

Color	m_arrowColorCached

Color	m_arrowColorHoverCached

Color	m_arrowColorDisabledCached

Color	m_arrowBackgroundColorCached

Color	m_arrowBackgroundColorHoverCached

Color	m_arrowBackgroundColorDisabledCached

Color	m_textColorCached

Color	m_textColorDisabledCached

Protected Attributes inherited from tgui::Widget
String	m_type

String	m_name

Layout2d	m_position
	Stores the position of this widget.

Layout2d	m_size
	Stores the size of this widget.

unsigned int	m_textSize = 0

Vector2f	m_origin

Optional< Vector2f >	m_rotationOrigin

Optional< Vector2f >	m_scaleOrigin

Vector2f	m_scaleFactors = {1, 1}

float	m_rotationDeg = 0

Vector2f	m_prevPosition

Vector2f	m_prevSize

std::unordered_set< Layout * >	m_boundPositionLayouts

std::unordered_set< Layout * >	m_boundSizeLayouts

bool	m_enabled = true
	Stores the flag indicating whether this widget is enabled.

bool	m_visible = true
	Stores the flag indicating whether this widget is visible.

Container *	m_parent = nullptr

BackendGui *	m_parentGui = nullptr

bool	m_mouseHover = false

bool	m_mouseDown = false

bool	m_focused = false

bool	m_focusable = true

std::weak_ptr< Widget >	m_navWidgetUp

std::weak_ptr< Widget >	m_navWidgetDown

std::weak_ptr< Widget >	m_navWidgetRight

std::weak_ptr< Widget >	m_navWidgetLeft

Duration	m_animationTimeElapsed

bool	m_containerWidget = false

Widget::Ptr	m_toolTip = nullptr

aurora::CopiedPtr< WidgetRenderer >	m_renderer = nullptr

std::vector< std::unique_ptr< priv::Animation > >	m_showAnimations

Font	m_inheritedFont

float	m_inheritedOpacity = 1

Any	m_userData

Cursor::Type	m_mouseCursor = Cursor::Type::Arrow

AutoLayout	m_autoLayout = AutoLayout::Manual

bool	m_autoLayoutUpdateEnabled = true

Font	m_fontCached = Font::getGlobalFont()

float	m_opacityCached = 1

bool	m_transparentTextureCached = false

unsigned int	m_textSizeCached = 0

Additional Inherited Members
Protected Types inherited from tgui::Widget
using	SavingRenderersMap = std::map<const Widget*, std::pair<std::unique_ptr<DataIO::Node>, String>>

using	LoadingRenderersMap = std::map<String, std::shared_ptr<RendererData>>

Detailed Description

Combo box widget.

Member Enumeration Documentation

◆ ExpandDirection

enum class tgui::ComboBox::ExpandDirection

strong

The side where the list will be displayed.

Enumerator
Down	Display the list below the combo box.
Up	Display the list above the combo box.
Automatic	Display the list below the combo box unless it wouldn't fit on the screen.

Member Function Documentation

◆ addItem()

std::size_t tgui::ComboBox::addItem	(	const String &	itemName,
		const String &	id = "" )

Adds an item to the list, so that it can be selected later.

Parameters

itemName	The name of the item you want to add (this is the text that will be displayed inside the combo box)
id	Optional unique id given to this item for the purpose to later identifying this item

Returns

Index of inserted item if no maximum items are set or when index is still less than getMaximumItems()
Value of getMaximumItems() when adding item failed because there are too many items

◆ changeItem()

bool tgui::ComboBox::changeItem	(	const String &	originalValue,
		const String &	newValue )

Changes an item with name originalValue to newValue.

Parameters

originalValue	The name of the item which you want to change
newValue	The new name for that item

In case the names are not unique, only the first item with that name will be changed.

Returns

true when the item was changed
false when none of the items had the given name

◆ changeItemById()

bool tgui::ComboBox::changeItemById	(	const String &	id,
		const String &	newValue )

Changes the name of an item with the given id to newValue.

Parameters

id	The unique id of the item which you want to change
newValue	The new name for that item

In case the id is not unique, only the first item with that id will be changed.

Returns

true when the item was changed
false when none of the items had the given id

◆ changeItemByIndex()

bool tgui::ComboBox::changeItemByIndex	(	std::size_t	index,
		const String &	newValue )

Changes the name of an item at the given index to newValue.

Parameters

index	The index of the item which you want to change
newValue	The new name for that item

Returns

true when the item was changed
false when the index was too high

◆ clone()

TGUI_NODISCARD Widget::Ptr tgui::ComboBox::clone ( ) const

overrideprotectedvirtual

Makes a copy of the widget if you don't know its exact type.

This function should only be used when you don't know the type of the widget. If you know what kind of widget you are copying, you should use the copy function.

Returns: Copy of the widget

Implements tgui::Widget.

◆ contains()

TGUI_NODISCARD bool tgui::ComboBox::contains ( const String & item ) const

Returns whether the combo box contains the given item.

Returns: Does the combo box contain the item?

◆ containsId()

TGUI_NODISCARD bool tgui::ComboBox::containsId ( const String & id ) const

Returns whether the combo box contains an item with the given id.

Returns: Does the combo box contain the id?

◆ copy()

static TGUI_NODISCARD ComboBox::Ptr tgui::ComboBox::copy ( const ComboBox::ConstPtr & comboBox )

static

Makes a copy of another combo box.

Parameters

comboBox The other combo box

Returns: The new combo box

◆ create()

static TGUI_NODISCARD ComboBox::Ptr tgui::ComboBox::create ( )

static

Creates a new combo box widget.

Returns: The new combo box

◆ deselectItem()

void tgui::ComboBox::deselectItem ( )

Deselects the selected item.

The combo box will be empty after this function is called.

◆ draw()

void tgui::ComboBox::draw	(	BackendRenderTarget &	target,
		RenderStates	states ) const

overridevirtual

Draw the widget to a render target.

Parameters

target	Render target to draw to
states	Current render states

Implements tgui::Widget.

◆ getChangeItemOnScroll()

TGUI_NODISCARD bool tgui::ComboBox::getChangeItemOnScroll ( ) const

Returns whether the mouse wheel can be used to change the selected item while the list is closed.

Returns: Should the selected item be changed when scrolling while the mouse is on top of the combo box?

◆ getDefaultText()

TGUI_NODISCARD const String & tgui::ComboBox::getDefaultText ( ) const

Returns the default text of the combo box. This is the text drawn when no item is selected.

Returns: The default text of the combo box

◆ getExpandDirection()

TGUI_NODISCARD ExpandDirection tgui::ComboBox::getExpandDirection ( ) const

Returns the side where the list is displayed.

Returns: On which side of the combo box is the list be displayed?

◆ getItemById()

TGUI_NODISCARD String tgui::ComboBox::getItemById ( const String & id ) const

Returns the item name of the item with the given id.

Parameters

id	The id of the item that was given to it when it was added

In case the id is not unique, the first item with that id will be returned.

Returns: The requested item, or an empty string when no item matches the id

◆ getItemCount()

TGUI_NODISCARD std::size_t tgui::ComboBox::getItemCount ( ) const

Returns the amount of items in the combo box.

Returns: Number of items inside the combo box

◆ getItemIds()

TGUI_NODISCARD std::vector< String > tgui::ComboBox::getItemIds ( ) const

Returns a copy of the item ids in the combo box.

Returns: item ids

Items that were not given an id simply have an empty string as id.

◆ getItems()

TGUI_NODISCARD std::vector< String > tgui::ComboBox::getItems ( ) const

Returns a copy of the items in the combo box.

Returns: items

◆ getItemsToDisplay()

TGUI_NODISCARD std::size_t tgui::ComboBox::getItemsToDisplay ( ) const

Returns the number of items that are displayed in the list.

Returns: The maximum number of items to display when the list of items is shown

When there is no scrollbar then this is the maximum number of items. If there is one, then it will only become visible when there are more items than this number.

When set to zero then all items are shown (then there will never be a scrollbar).

◆ getMaximumItems()

TGUI_NODISCARD std::size_t tgui::ComboBox::getMaximumItems ( ) const

Returns the maximum items that the combo box can contain.

Returns: The maximum items inside the list. If the function returns 0 then there is no limit

◆ getRenderer()

TGUI_NODISCARD TGUI_NODISCARD ComboBoxRenderer * tgui::ComboBox::getRenderer ( )

overridevirtual

Returns the renderer, which gives access to functions that determine how the widget is displayed.

Returns: Temporary pointer to the renderer

Warning: After calling this function, the widget has its own copy of the renderer and it will no longer be shared.

Reimplemented from tgui::Widget.

◆ getSelectedItem()

TGUI_NODISCARD String tgui::ComboBox::getSelectedItem ( ) const

Returns the currently selected item.

Returns: The selected item. When no item was selected then this function will return an empty string

◆ getSelectedItemId()

TGUI_NODISCARD String tgui::ComboBox::getSelectedItemId ( ) const

Gets the id of the selected item.

Returns: The id of the selected item, which was the optional id passed to the addItem function. When no item was selected then this function returns 0

◆ getSelectedItemIndex()

TGUI_NODISCARD int tgui::ComboBox::getSelectedItemIndex ( ) const

Gets the index of the selected item.

Returns: The index of the selected item, or -1 when no item was selected

◆ getSharedRenderer() [1/2]

TGUI_NODISCARD const ComboBoxRenderer * tgui::ComboBox::getSharedRenderer ( ) const

overridevirtual

Reimplemented from tgui::Widget.

◆ getSharedRenderer() [2/2]

TGUI_NODISCARD ComboBoxRenderer * tgui::ComboBox::getSharedRenderer ( )

overridevirtual

Returns the renderer, which gives access to functions that determine how the widget is displayed.

Returns: Temporary pointer to the renderer that may be shared with other widgets using the same renderer

Reimplemented from tgui::Widget.

◆ getSignal()

TGUI_NODISCARD Signal & tgui::ComboBox::getSignal ( String signalName )

overrideprotectedvirtual

Retrieves a signal based on its name.

Parameters

signalName Name of the signal

Returns: Signal that corresponds to the name

Exceptions

Exception when the name does not match any signal

Reimplemented from tgui::Widget.

◆ isMouseOnWidget()

TGUI_NODISCARD bool tgui::ComboBox::isMouseOnWidget ( Vector2f pos ) const

overridevirtual

Returns whether the mouse position (which is relative to the parent widget) lies on top of the widget.

Returns: Is the mouse on top of the widget?

Implements tgui::Widget.

◆ leftMousePressed()

bool tgui::ComboBox::leftMousePressed ( Vector2f pos )

overridevirtual

Called by the parent when the left mouse button goes down on top of the widget.

Parameters

pos	Mouse position in view coordinates relative to the parent widget

Returns: True if the clicked part of the widget is draggable, i.e. if the widget should continue to receive mouse move events until the mouse is released, even when the mouse leaves the widget. When false is returned, the mouse move events will only be sent to the widget as long as the mouse is on top of the widget.

Reimplemented from tgui::Widget.

◆ load()

void tgui::ComboBox::load	(	const std::unique_ptr< DataIO::Node > &	node,
		const LoadingRenderersMap &	renderers )

overrideprotectedvirtual

Loads the widget from a tree of nodes.

Reimplemented from tgui::Widget.

◆ removeItem()

bool tgui::ComboBox::removeItem ( const String & itemName )

Removes the item from the list with the given name.

Parameters

itemName The item to remove

In case the names are not unique, only the first item with that name will be removed.

Returns

true when the item was removed
false when the name did not match any item

◆ removeItemById()

bool tgui::ComboBox::removeItemById ( const String & id )

Removes the item that were added with the given id.

Parameters

id	Id that was given to the addItem function

In case the id is not unique, only the first item with that id will be removed.

Returns

true when the item was removed
false when there was no item with the given id

◆ removeItemByIndex()

bool tgui::ComboBox::removeItemByIndex ( std::size_t index )

Removes the item from the list.

Parameters

index Index of the item in the list

Returns

true when the item was removed
false when the index was too high

See also: removeItem; removeItemById

◆ rendererChanged()

void tgui::ComboBox::rendererChanged ( const String & property )

overrideprotectedvirtual

Function called when one of the properties of the renderer is changed.

Parameters

property Name of the property that was changed

Reimplemented from tgui::Widget.

◆ save()

TGUI_NODISCARD std::unique_ptr< DataIO::Node > tgui::ComboBox::save ( SavingRenderersMap & renderers ) const

overrideprotectedvirtual

Saves the widget as a tree node in order to save it to a file.

Reimplemented from tgui::Widget.

◆ scrolled()

bool tgui::ComboBox::scrolled	(	float	delta,
		Vector2f	pos,
		bool	touch )

overridevirtual

Called by the parent on scroll event (either from mouse wheel of from two finger scrolling on a touchscreen)

Parameters

delta	Scroll offset (positive is up, negative is down). High-precision mice may use non-integral offsets.
pos	Mouse position, or the initial position of the touch events
touch	Was this a touch event or a mouse wheel scroll?

Returns: Was the scrolling was handled by the widget?

Reimplemented from tgui::Widget.

◆ setChangeItemOnScroll()

void tgui::ComboBox::setChangeItemOnScroll ( bool changeOnScroll )

Changes whether the mouse wheel can be used to change the selected item while the list is closed.

Parameters

changeOnScroll Should the selected item be changed when scrolling while the mouse is on top of the combo box?

◆ setDefaultText()

void tgui::ComboBox::setDefaultText ( const String & defaultText )

Changes the default text of the combo box. This is the text drawn when no item is selected.

Parameters

defaultText The new default text

◆ setEnabled()

void tgui::ComboBox::setEnabled ( bool enabled )

overridevirtual

Enables or disables the widget.

Parameters

enabled Is the widget enabled?

The disabled widget will no longer receive events and thus no longer send callbacks. All widgets are enabled by default.

Reimplemented from tgui::Widget.

◆ setExpandDirection()

void tgui::ComboBox::setExpandDirection ( ExpandDirection direction )

Changes the side where the list is displayed.

Parameters

direction On which side of the combo box should the list be displayed?

◆ setItemsToDisplay()

void tgui::ComboBox::setItemsToDisplay ( std::size_t nrOfItemsInListToDisplay )

Changes the number of items that are displayed in the list.

Parameters

nrOfItemsInListToDisplay The maximum number of items to display when the list of items is shown

When there is no scrollbar then this is the maximum number of items. If there is one, then it will only become visible when there are more items than this number.

When set to zero then all items are shown (then there will never be a scrollbar).

◆ setMaximumItems()

void tgui::ComboBox::setMaximumItems ( std::size_t maximumItems = 0 )

Changes the maximum items that the combo box can contain.

Parameters

maximumItems The maximum items inside the combo box. When the maximum is set to 0 then the limit will be disabled

If no scrollbar was loaded then there is always a limitation because there will be a limited space for the items.

◆ setParent()

void tgui::ComboBox::setParent ( Container * parent )

overridevirtual

Reimplemented from tgui::Widget.

◆ setSelectedItem()

bool tgui::ComboBox::setSelectedItem ( const String & itemName )

Selects an item from the list.

When adding items to the combo box with the addItem function, none of them will be selected. If you don't want the combo box to stay empty until the user selects something, but you want a default item instead, then you can use this function to select an item.

Parameters

itemName The item you want to select

In case the names are not unique, the first item with that name will be selected.

Returns

true on success
false when none of the items matches the name

See also: setSelectedItemById

◆ setSelectedItemById()

bool tgui::ComboBox::setSelectedItemById ( const String & id )

Selects an item from the list.

When adding items to the combo box with the addItem function, none of them will be selected. If you don't want the combo box to stay empty until the user selects something, but you want a default item instead, then you can use this function to select an item.

Parameters

id	Unique id passed to addItem

In case the id would not be unique, the first item with that id will be selected.

Returns

true on success
false when none of the items has the given id

See also: setSelectedItem

◆ setSelectedItemByIndex()

bool tgui::ComboBox::setSelectedItemByIndex ( std::size_t index )

Selects an item in the list.

Parameters

index Index of the item in the list

Returns

true on success
false when the index was too high

See also: setSelectedItem; setSelectedItemById

◆ setSize() [1/3]

virtual void tgui::Widget::setSize ( const Layout2d & size )

virtual

Changes the size of the widget.

Parameters

size	Size of the widget

Usage examples:

// Give the widget an exact size
widget->setSize({40, 30});
 
// Give the widget a size relative to the size of its parent
widget->setSize({"20%", "5%"});
 
// Make the widget 50 pixels higher than some other widget and automatically resize it when the other widget resizes
widget->setSize({200, tgui::bindHeight(otherWidget) + 50});

Reimplemented from tgui::Widget.

◆ setSize() [2/3]

void tgui::ComboBox::setSize ( const Layout2d & size )

overridevirtual

Changes the size of the combo box.

This size does not include the borders.

Parameters

size	The new size of the combo box

Reimplemented from tgui::Widget.

◆ setSize() [3/3]

void tgui::Widget::setSize	(	Layout	width,
		Layout	height )

inline

Changes the size of the widget.

Parameters

width	Width of the widget
height	Height of the widget

Warning: This setSize overload must never be used from internal TGUI code or by custom widget implementations

◆ updateTextSize()

void tgui::ComboBox::updateTextSize ( )

overrideprotectedvirtual

Called when the text size is changed (either by setTextSize or via the renderer)

Reimplemented from tgui::Widget.

The documentation for this class was generated from the following file:

include/TGUI/Widgets/ComboBox.hpp

TGUI

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ ExpandDirection

Member Function Documentation

◆ addItem()

◆ changeItem()

◆ changeItemById()

◆ changeItemByIndex()

◆ clone()

◆ contains()

◆ containsId()

◆ copy()

◆ create()

◆ deselectItem()

◆ draw()

◆ getChangeItemOnScroll()

◆ getDefaultText()

◆ getExpandDirection()

◆ getItemById()

◆ getItemCount()

◆ getItemIds()

◆ getItems()

◆ getItemsToDisplay()

◆ getMaximumItems()

◆ getRenderer()

◆ getSelectedItem()

◆ getSelectedItemId()

◆ getSelectedItemIndex()

◆ getSharedRenderer() [1/2]

◆ getSharedRenderer() [2/2]

◆ getSignal()

◆ isMouseOnWidget()

◆ leftMousePressed()

◆ load()

◆ removeItem()

◆ removeItemById()

◆ removeItemByIndex()

◆ rendererChanged()

◆ save()

◆ scrolled()

◆ setChangeItemOnScroll()

◆ setDefaultText()

◆ setEnabled()

◆ setExpandDirection()

◆ setItemsToDisplay()

◆ setMaximumItems()

◆ setParent()

◆ setSelectedItem()

◆ setSelectedItemById()

◆ setSelectedItemByIndex()

◆ setSize() [1/3]

◆ setSize() [2/3]

◆ setSize() [3/3]

◆ updateTextSize()