The lysa.ui sub-module — immediate-mode UI widgets and window management.

Enums & Constants
enum	Alignment
	Constants controlling how a widget is placed inside its parent's content area.

enum	ArrowOrientation
	Direction an Arrow points to.

enum	CheckState
	Check/toggle state constants for CheckWidget and ToggleButton.

enum	ColorPickerComponent
	Color component identifying a row of a ColorPicker.

enum	ColorPickerMode
	Color space displayed by a ColorPicker.

enum	LineStyle
	Orientation constants for Line widgets.

enum	ProgressBarDisplay
	Optional text display mode drawn over the progress bar.

enum	ProgressBarType
	Orientation constants for ProgressBar widgets.

enum	ResizeableBorder
	Bitmask constants for which borders of a Window can be dragged to resize it.

enum	ScrollBarButtonsPlacement
	End of the bar where the two buttons of a ScrollBar are placed.

enum	ScrollBarType
	Orientation constants for ScrollBar widgets.

enum	SliderType
	Orientation constants for Slider and ColorSlider widgets.

enum	SortOrder
	Direction of the sort of a column of a Table.

enum	SpinBoxButtonsPlacement
	Side of the text field of a SpinBox where the two buttons are placed.

enum	SpinButtonsOrientation
	Placement constants for the two buttons of a SpinButtons widget.

enum	SVGBounds
	Reference rectangle used to fit an SVG shape into an IconSVG.

enum	TabPlacement
	Position of a bar of tabs relatively to the content displayed by the tabs.

enum	TreeViewSelectionMode
	Selection behavior constants for TreeView widgets.

enum	WidgetType
	Integer constants identifying the concrete type of a widget.

Structures
struct	Arrow
	An arrow head drawn inside a square area centered in the widget rectangle.

struct	CheckWidget
	Base class for widgets with a binary checked/unchecked state (e.g. ToggleButton).

struct	Frame
	A bordered panel with a title string rendered in its top border.

struct	Line
	A thin separator line, either horizontal or vertical.

struct	Popup
	A widget placed at a fixed (x, y) position relative to its parent and always drawn on top of sibling widgets.

struct	TreeViewItem
	A single row in a TreeView, which can contain a child widget and be expanded or collapsed.

struct	UIEvent
	String event-type constants used when subscribing to widget events via EventManager.

struct	ValueSelect
	Base class for widgets that expose a numeric value within a bounded range.

Classes
class	Box
	A Panel with a visible border drawn around its edges.

class	Button
	A push button that fires the OnClick event when pressed and released by the user.

class	CheckBox
	A two-state box displaying a CheckMark when checked. Each click toggles the state and fires OnStateChange.

class	CheckMark
	A check mark drawn inside the widget rectangle, sized to fill it.

class	ColorPicker
	A color selector with a color wheel and one slider per component. Fires OnColorChange.

class	ColorPickerButton
	A button displaying a color, opening a ColorPicker dialog when clicked. Fires OnColorChange.

class	ColorSlider
	A Slider whose track is drawn with a gradient of colors.

class	ColorWheel
	A disc selecting the hue and the saturation of a color. Fires OnColorChange.

class	CrossMark
	A cross mark drawn inside the widget rectangle, sized to fill it. Opposite of a CheckMark.

class	DropDownList
	A button displaying the selected item of a list, opening a popup list when clicked. Fires OnSelectItem.

class	FoldableContainer
	A container folding and unfolding its content with a clickable title bar. Fires OnExpandItem with the content widget when the state changes.

class	Grid
	A grid of GridCell with per-row heights, per-column widths and spanning cells. A row or a column sized with zero shares the remaining space with the other automatically sized rows and columns.

class	GridCell
	A cell of a Grid, holding the widgets displayed at one position of the grid. The data displayed by a cell is never owned by the cell, store it in its user data.

class	HColorSlider
	A horizontal color gradient slider.

class	HLine
	A horizontal separator line widget.

class	HProgressBar
	A horizontal progress bar (fills left to right).

class	HScrollBar
	A horizontal scroll bar widget.

class	HSlider
	A horizontal slider, the value increases to the right.

class	Icon
	Base class for the widgets drawing a picture fitted into the widget rectangle.

class	IconImage
	A 2-D image fitted into the widget rectangle.

class	IconSVG
	An SVG shape fitted into the widget rectangle.

class	Image
	A widget that displays a GPU image with an optional color tint.

class	List
	Base class for all list-of-widgets widgets. Fires OnInsertItem, OnRemoveItem and OnSelectItem events.

class	ListBox
	A scrollable list of widgets with a selection highlight rectangle. Supports keyboard navigation.

class	Menu
	A vertical list of text items, optionally split into groups by separator lines. Fires OnSelectItem when an item is clicked.

class	Panel
	A rectangular widget that renders only a background fill; no border.

class	ProgressBar
	A rectangular progress bar widget that fills as its value increases.

class	RadioButton
	A two-state button drawn with two circles, the inner circle color changes with the state. Checking one radio button unchecks the other radio buttons sharing the same parent widget and the same group_index.

class	RichTextArea
	A read-only area displaying word-wrapped text marked up with BBCode. Supported tags : [b], [i], [u], [s], [color=...], [size=n], [url=target], [code], [left], [center], [right] and [br]. Fires OnClick when a link is clicked.

class	ScrollBar
	A scroll bar widget whose value represents a scroll position within [min, max].

class	ScrollBox
	A scrollable container with horizontal and vertical scroll bars. Add children via add_content.

class	Selection
	A selection highlight rectangle drawn behind the selected item of a ListBox.

class	Slider
	A value selected by dragging a grip along a track. Fires OnValueChange.

class	SpinBox
	An editable numeric value with two buttons incrementing and decrementing it. Fires OnValueChange.

class	Style
	The drawing backend of the widgets, configured with a map of name-value options.

class	TabBar
	A horizontal bar of tabs. Draws and selects the tabs, without managing the widgets they display. Fires OnSelectItem when a tab is selected.

class	TabContainer
	A container displaying one widget at a time, selected with a TabBar. Fires OnSelectItem with the displayed widget when a tab is selected.

class	Table
	A Grid with a row of column headers. Clicking a sortable header fires OnSortColumn, dragging the right border of a resizable header fires OnResizeColumn. The rows are never reordered by the table itself.

class	Text
	A single-line read-only text label.

class	TextEdit
	A single-line editable text input field. Fires OnTextChange and OnTextInput events.

class	ToggleButton
	A button that alternates between checked and unchecked states on each click. Fires OnStateChange on toggle.

class	TreeView
	A hierarchical list widget that displays items in an expandable/collapsible tree structure.

class	VColorSlider
	A vertical color gradient slider.

class	VLine
	A vertical separator line widget.

class	VProgressBar
	A vertical progress bar (fills bottom to top).

class	VScrollBar
	A vertical scroll bar widget.

class	VSlider
	A vertical slider, the value increases to the top.

class	Widget
	The base class for all UI widgets. Provides layout, input handling, and child management.

class	Window
	A UI window that owns a root Widget hierarchy and is managed by the WindowManager.

class	WindowManager
	The central manager for all UI windows attached to a rendering target.

Enums & Constants

Structures

Classes