ui::Body Class Reference

The root widget of a UI. More...

#include <body.hpp>

Inheritance diagram for ui::Body:

Public Member Functions
	Body (Widget *child, color_t backgroundColor=COLOR_BLACK, const Padding &padding={0})
	Construct the body with an optional color and padding for the child widget.
void	draw () const override
	Render the widget to the screen.
Size	size () const override
	Get the size of the widget.
Bounds	bounds () const override
	Get the rendering bounds of this widget.
void	setColor (color_t new_color)
	Set the background color.
Public Member Functions inherited from ui::SingleChildWidget
	SingleChildWidget (Widget *child, const Position &pos={0, 0}, const Alignment &align={ALIGN_LEFT, ALIGN_TOP}, const Padding &padding={0})
	Constructor.
	~SingleChildWidget () override
	Destructor.
Size	size () const override
	Get the size of the widget.
void	update (time_t time_ms) override
	Update any internal state of the widget, and check if it needs to be re-rendered.
void	render (bool force) const override
	Recursively render this widget and any child widgets that need it.
void	drawDone () override
	Reset any state variables after rendering has finished.
void	setChild (Widget *const child)
	Set the child widget.
bool	handleEvent (Event &event) override
	Handle events from the touchscreen.
Widget *	getChild () const
	Get the current child widget.
virtual void	drawBoundingBox (time_t time) const override
	Render the bounding box of this and any child widgets.
Widget *	getWidgetById (id_t id) noexcept override
	Get the first widget (this or any children) that has the given ID.
Public Member Functions inherited from ui::Widget
	Widget (const Position &pos={0, 0}, const Alignment &align={ALIGN_LEFT, ALIGN_TOP}, const Padding &padding={0})
	The default widget constructor.
virtual	~Widget ()
	The default widget destructor.
void	setPosition (const Position &pos)
	Set the position of this widget.
Position	getPosition () const
	Get the position of this widget.
void	setAlign (const Alignment &align)
	Set the alignment of this widget.
void	requestRedraw ()
	Tell this widget that it needs to be re-rendered.
void	requestParentRedraw ()
	Tell the parent widget that it needs to be re-rendered.
bool	needsRedraw () const
	Check if this widget has requested to be redrawn.
void	setParent (Widget *parent)
	Set the parent widget.
Bounds	parentBounds () const
	Get the bounds of the parent widget, if any.
void	onpress (std::function< void(Widget &, const Event &)> callback) override
	Register a touchscreen event handler that triggers on press.
void	onblur (std::function< void(Widget &, const Event &)> callback) override
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onhold (std::function< void(Widget &, const Event &, time_t)> callback) override
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onrelease (std::function< void(Widget &, const Event &)> callback) override
	Register a touchscreen event handler that triggers on release.
void	click ()
	Manually trigger the onrelease event handler.
void	press ()
	Manually trigger the onpress event handler.
void	blur ()
	Manually trigger the onblur event handler.
void	release ()
	Manually trigger the onrelease event handler.
void	hold (time_t time)
	Manually trigger the onhold event handler.
Public Member Functions inherited from ui::EventHandlers< Widget >
void	onpress (std::function< void(Widget &)> callback)
	Register a touchscreen event handler that triggers on press.
void	onpress (std::function< void(const Event &)> callback)
	Register a touchscreen event handler that triggers on press.
void	onpress (std::function< void()> callback)
	Register a touchscreen event handler that triggers on press.
void	onrelease (std::function< void(Widget &)> callback)
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onrelease (std::function< void(const Event &)> callback)
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onrelease (std::function< void()> callback)
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onblur (std::function< void(Widget &)> callback)
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onblur (std::function< void(const Event &)> callback)
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onblur (std::function< void()> callback)
	Register a touchscreen event handler that triggers when the widget stops being pressed.
void	onhold (std::function< void(Widget &, time_t)> callback)
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onhold (std::function< void(const Event &, time_t)> callback)
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onhold (std::function< void(time_t)> callback)
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onhold (std::function< void(Widget &)> callback)
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onhold (std::function< void(const Event &)> callback)
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onhold (std::function< void()> callback)
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onclick (std::function< void(Widget &)> callback)
	Register a touchscreen event handler that triggers on release.
void	onclick (std::function< void(const Event &)> callback)
	Register a touchscreen event handler that triggers on release.
void	onclick (std::function< void()> callback)
	Register a touchscreen event handler that triggers on release.
Public Member Functions inherited from ui::CoreEventHandlers< T >
virtual void	onpress (std::function< void(T &, const Event &)> callback)=0
	Register a touchscreen event handler that triggers on press.
virtual void	onrelease (std::function< void(T &, const Event &)> callback)=0
	Register a touchscreen event handler that triggers when the widget stops being pressed.
virtual void	onblur (std::function< void(T &, const Event &)> callback)=0
	Register a touchscreen event handler that triggers when the widget stops being pressed.
virtual void	onhold (std::function< void(T &, const Event &, time_t)> callback)=0
	Register a touchscreen event handler that repeatedly triggers when the widget is held for a while.
void	onclick (std::function< void(T &, const Event &)> callback)
	Register a touchscreen event handler that triggers on release.

Additional Inherited Members
Public Attributes inherited from ui::Widget
id_t	id
	An optional (usually unique) identifier that can be used to search for this widget.
Protected Attributes inherited from ui::SingleChildWidget
Widget *	child
	The child widget.
Protected Attributes inherited from ui::Widget
Padding	padding
	The padding that will be applied to any child widgets.
bool	redrawSelf
	If true, force a redraw of this widget and any child widgets.

Detailed Description

The root widget of a UI.

This widget renders a single-color background onto the screen. To avoid odd rendering artifacts, it should always be used as the root widget.

Constructor & Destructor Documentation

Body()

ui::Body::Body	(	Widget *	child,
		color_t	backgroundColor = COLOR_BLACK,
		const Padding &	padding = {0}
	)

Construct the body with an optional color and padding for the child widget.

Parameters

child	The child widget.
backgroundColor	The color to fill the screen with.
padding	The padding to apply to the child widget.

Member Function Documentation

bounds()

Bounds ui::Body::bounds ( ) const

overridevirtual

Get the rendering bounds of this widget.

Returns

The bounds that this widget will render in.

Warning

This value may be based on the size of the parent widget, and so should never refer to the size of any child widgets!

Reimplemented from ui::Widget.

draw()

void ui::Body::draw ( ) const

overridevirtual

Render the widget to the screen.

This only gets called when widgets indicate that a redraw is needed of either themselves or their parents. Widgets that implement this method should only render graphics specific to this widget, not any children.

Implements ui::Widget.

setColor()

void ui::Body::setColor

(

color_t

new_color

)

Set the background color.

Parameters

new_color

The new background color.

size()

Size ui::Body::size ( ) const

overridevirtual

Get the size of the widget.

Returns

The width and height of the widget in pixels.

Warning

This value may be based on the size of the child widget, and so should never refer to the size of the parent widget!

Implements ui::Widget.

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

• src/ui/body.hpp