Horizontal slider UI element. More...

#include <slider.hpp>

Inheritance diagram for lmgl::ui::Slider:

Public Member Functions
	Slider (float min=0.0f, float max=1.0f, float initial_value=0.5f, const std::string &name="Slider")
	Constructor for Slider.
	~Slider () override=default
	Destructor.
void	set_value (float value)
	Set the slider value.
float	get_value () const
	Get the current value.
void	set_range (float min, float max)
	Set the value range.
void	set_label (const std::string &label)
	Set the label text.
void	set_on_value_changed (std::function< void(float)> callback)
	Set callback for value changes.
void	set_show_value (bool show)
	Set whether to show the value as text.
std::shared_ptr< Text >	get_label_text ()
	Get the label text element (for setting font).
std::shared_ptr< Text >	get_value_text ()
	Get the value text element (for setting font).
bool	contains_point (float x, float y, float canvas_width, float canvas_height) const
	Check if point is inside slider.
bool	handle_mouse_button (float x, float y, bool pressed, float canvas_width, float canvas_height)
	Handle mouse button event.
void	handle_mouse_drag (float x, float y, float canvas_width, float canvas_height)
	Handle mouse drag.
void	render (float canvas_width, float canvas_height, const glm::mat4 &projection) override
	Render the slider.
Public Member Functions inherited from lmgl::ui::UIElement
	UIElement (const std::string &name="UIElement")
	Constructor for UIElement.
virtual	~UIElement ()=default
	Virtual destructor.
void	set_position (const glm::vec2 &position)
	Set the position of the UI element.
void	set_size (const glm::vec2 &size)
	Set the size of the UI element.
void	set_anchor (Anchor anchor)
	Set the anchor of the UI element.
void	set_render_order (int order)
	Set the render order (z-index).
void	set_visible (bool visible)
	Set visibility of the UI element.
void	set_name (const std::string &name)
	Set the name of the UI element.
const glm::vec2 &	get_position () const
	Get the position of the UI element.
const glm::vec2 &	get_size () const
	Get the size of the UI element.
Anchor	get_anchor () const
	Get the anchor of the UI element.
int	get_render_order () const
	Get the render order.
bool	is_visible () const
	Check if the UI element is visible.
const std::string &	get_name () const
	Get the name of the UI element.
std::shared_ptr< UIElement >	get_parent () const
	Get the parent UI element.
void	add_child (const std::shared_ptr< UIElement > child)
	Add a child UI element.
void	remove_child (const std::shared_ptr< UIElement > child)
	Remove a child UI element.
std::vector< std::shared_ptr< UIElement > >	get_children () const
	Get all child UI elements.
glm::vec2	get_absolute_position (float canvas_width, float canvas_height) const
	Compute the absolute screen position based on anchor and parent.

Additional Inherited Members
Protected Attributes inherited from lmgl::ui::UIElement
std::string	m_name
	Name of the UI element.
glm::vec2	m_position {0.0f, 0.0f}
	Position in pixels (relative to anchor).
glm::vec2	m_size {100.0f, 100.0f}
	Size in pixels.
Anchor	m_anchor {Anchor::TopLeft}
	Anchor preset.
int	m_render_order {0}
	Render order (z-index).
bool	m_visible {true}
	Visibility flag.
std::weak_ptr< UIElement >	m_parent
	Parent UI element.
std::vector< std::shared_ptr< UIElement > >	m_children
	Child UI elements.

Detailed Description

Horizontal slider UI element.

Constructor & Destructor Documentation

◆ Slider()

lmgl::ui::Slider::Slider	(	float	min = 0.0f,
		float	max = 1.0f,
		float	initial_value = 0.5f,
		const std::string &	name = "Slider" )

Constructor for Slider.

Parameters

min	Minimum value.
max	Maximum value.
initial_value	Initial value.
name	Optional name.

Member Function Documentation

◆ contains_point()

bool lmgl::ui::Slider::contains_point	(	float	x,
		float	y,
		float	canvas_width,
		float	canvas_height ) const

Check if point is inside slider.

Parameters

x	X coordinate.
y	Y coordinate.
canvas_width	Canvas width.
canvas_height	Canvas height.

Returns: True if inside.

◆ get_label_text()

std::shared_ptr< Text > lmgl::ui::Slider::get_label_text ( )

inline

Get the label text element (for setting font).

Returns: Pointer to label text.

◆ get_value()

float lmgl::ui::Slider::get_value ( ) const

inline

Get the current value.

Returns: Current value.

◆ get_value_text()

std::shared_ptr< Text > lmgl::ui::Slider::get_value_text ( )

inline

Get the value text element (for setting font).

Returns: Pointer to value text.

◆ handle_mouse_button()

bool lmgl::ui::Slider::handle_mouse_button	(	float	x,
		float	y,
		bool	pressed,
		float	canvas_width,
		float	canvas_height )

Handle mouse button event.

Parameters

x	Mouse X.
y	Mouse Y.
pressed	True if pressed.
canvas_width	Canvas width.
canvas_height	Canvas height.

Returns: True if handled.

◆ handle_mouse_drag()

void lmgl::ui::Slider::handle_mouse_drag	(	float	x,
		float	y,
		float	canvas_width,
		float	canvas_height )

Handle mouse drag.

Parameters

x	Mouse X.
y	Mouse Y.
canvas_width	Canvas width.
canvas_height	Canvas height.

◆ render()

void lmgl::ui::Slider::render	(	float	canvas_width,
		float	canvas_height,
		const glm::mat4 &	projection )

overridevirtual

Render the slider.

Parameters

canvas_width	Canvas width.
canvas_height	Canvas height.
projection	Projection matrix.

Implements lmgl::ui::UIElement.

◆ set_label()

void lmgl::ui::Slider::set_label ( const std::string & label )

Set the label text.

Parameters

label Label text.

◆ set_on_value_changed()

void lmgl::ui::Slider::set_on_value_changed ( std::function< void(float)> callback )

inline

Set callback for value changes.

Parameters

callback Function called with new value.

◆ set_range()

void lmgl::ui::Slider::set_range	(	float	min,
		float	max )

Set the value range.

Parameters

min	Minimum value.
max	Maximum value.

◆ set_show_value()

void lmgl::ui::Slider::set_show_value ( bool show )

inline

Set whether to show the value as text.

Parameters

show	True to show value.

◆ set_value()

void lmgl::ui::Slider::set_value ( float value )

Set the slider value.

Parameters

value New value (will be clamped to min/max).

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

include/lmgl/ui/slider.hpp
src/ui/slider.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Slider()

Member Function Documentation

◆ contains_point()

◆ get_label_text()

◆ get_value()

◆ get_value_text()

◆ handle_mouse_button()

◆ handle_mouse_drag()

◆ render()

◆ set_label()

◆ set_on_value_changed()

◆ set_range()

◆ set_show_value()

◆ set_value()