KLed Class Reference

#include <kled.h>

Inheritance diagram for KLed:

Public Types
enum	Look { Flat, Raised, Sunken }
enum	Shape { Rectangular, Circular }
enum	State { Off, On }

Public Slots
void	off ()
void	on ()
void	toggle ()

Public Member Functions
	KLed (QWidget *parent=0)
	KLed (const QColor &color, QWidget *parent=0)
	KLed (const QColor &color, KLed::State state, KLed::Look look, KLed::Shape shape, QWidget *parent=0)
	~KLed ()
QColor	color () const
int	darkFactor () const
Look	look () const
virtual QSize	minimumSizeHint () const
void	setColor (const QColor &color)
void	setDarkFactor (int darkFactor)
void	setLook (Look look)
void	setShape (Shape shape)
void	setState (State state)
Shape	shape () const
virtual QSize	sizeHint () const
State	state () const

Protected Member Functions
virtual int	ledWidth () const
bool	paintCachedPixmap ()
void	paintEvent (QPaintEvent *)
virtual void	paintFlat ()
void	paintLed (Shape shape, Look look)
virtual void	paintRaised ()
virtual void	paintRect ()
virtual void	paintRectFrame (bool raised)
virtual void	paintSunken ()
void	resizeEvent (QResizeEvent *)
void	updateCachedPixmap ()

Properties
QColor	color
int	darkFactor
Look	look
Shape	shape
State	state

Detailed Description

An LED widget.

Displays a round or rectangular light emitting diode.

It is configurable to arbitrary colors, the two on/off states and three styles (or "looks");

It may display itself in a performant flat view, a round view with light spot or a round view sunken in the screen.

KDE LED Widget

Author

Joerg Habenicht, Richard J. Moore (rich@.nosp@m.kde..nosp@m.org) 1998, 1999

Definition at line 44 of file kled.h.

Member Enumeration Documentation

enum KLed::Look

Displays a flat, round or sunken LED.

Displaying the LED flat is less time and color consuming, but not so nice to see.

The sunken LED itself is (certainly) smaller than the round LED because of the 3 shading circles and is most time consuming. Makes sense for LED > 15x15 pixels.

Timings:
( AMD K5/133, Diamond Stealth 64 PCI Graphics, widgetsize 29x29 )

• flat Approximately 0.7 msec per paint
• round Approximately 2.9 msec per paint
• sunken Approximately 3.3 msec per paint

The widget will be updated on the next repaining event.

LED look.

Enumerator
Flat
Raised
Sunken

Definition at line 88 of file kled.h.

enum KLed::Shape

Shades of the lamp.

LED shape

Enumerator
Rectangular
Circular

Definition at line 66 of file kled.h.

enum KLed::State

Status of the light is on/off.

LED on/off.

Enumerator
Off
On

Definition at line 60 of file kled.h.

Constructor & Destructor Documentation

KLed::KLed ( QWidget *  parent = 0 )

explicit

Constructs a green, round LED widget which will initially be turned on.

Parameters

parent

The parent widget.

Definition at line 52 of file kled.cpp.

KLed::KLed ( const QColor &  color, QWidget *  parent = 0  )

explicit

Constructs a round LED widget with the supplied color which will initially be turned on.

Parameters

color	Initial color of the LED.
parent	The parent widget. Constructor

Definition at line 60 of file kled.cpp.

KLed::KLed	(	const QColor &	color,
		KLed::State	state,
		KLed::Look	look,
		KLed::Shape	shape,
		QWidget *	parent = 0
	)

Constructor with the color, state and look.

Differs from above only in the parameters, which configure all settings.

Parameters

color	Initial color of the LED.
state	Sets the State.
look	Sets the Look.
shape	Sets the Shape (rectangular or circular).
parent	The parent widget. Constructor

Definition at line 67 of file kled.cpp.

KLed::~KLed

(

)

Destroys the LED widget.

Destructor

Definition at line 79 of file kled.cpp.

Member Function Documentation

QColor KLed::color

(

)

const

Returns the current color of the widget.

See also

Color Returns LED color.

int KLed::darkFactor

(

)

const

Returns the factor to darken the LED.

See also

setDarkFactor() Returns dark factor.

int KLed::ledWidth ( ) const

protectedvirtual

Returns the width of the led.

Definition at line 116 of file kled.cpp.

Look KLed::look

(

)

const

Returns the current look of the widget.

See also

Look Returns LED look.

QSize KLed::minimumSizeHint ( ) const

virtual

Definition at line 261 of file kled.cpp.

void KLed::off ( )

slot

Sets the state of the widget to Off.

The widget will be painted immediately.

See also

on() toggle() setState()

Definition at line 243 of file kled.cpp.

void KLed::on ( )

slot

Sets the state of the widget to On.

The widget will be painted immediately.

See also

off() toggle() setState()

Definition at line 238 of file kled.cpp.

bool KLed::paintCachedPixmap ( )

protected

Paint the cached antialiased pixmap corresponding to the state if any.

Returns

true if the pixmap was painted, false if it hasn't been created yet

Definition at line 127 of file kled.cpp.

void KLed::paintEvent ( QPaintEvent *  )

protected

Definition at line 84 of file kled.cpp.

void KLed::paintFlat ( )

protectedvirtual

Paints a circular, flat LED.

Definition at line 137 of file kled.cpp.

void KLed::paintLed ( Shape  shape, Look  look  )

protected

Definition at line 273 of file kled.cpp.

void KLed::paintRaised ( )

protectedvirtual

Paints a circular, raised LED.

Definition at line 142 of file kled.cpp.

void KLed::paintRect ( )

protectedvirtual

Paints a rectangular, flat LED.

Definition at line 152 of file kled.cpp.

void KLed::paintRectFrame ( bool  raised )

protectedvirtual

Paints a rectangular LED, either raised or sunken, depending on its argument.

Definition at line 157 of file kled.cpp.

void KLed::paintSunken ( )

protectedvirtual

Paints a circular, sunken LED.

Definition at line 147 of file kled.cpp.

void KLed::resizeEvent ( QResizeEvent *  )

protected

Definition at line 248 of file kled.cpp.

void KLed::setColor

(

const QColor &

color

)

Set the color of the widget.

The LED is shown with Color when in the KLed::On state or with the darken Color (

See also

setDarkFactor) in KLed::Off state.

The widget calls the update() method, so it will be updated when entering the main event loop.

See also

Color

Parameters

color

New color of the LED. Sets the LED color.

Definition at line 200 of file kled.cpp.

void KLed::setDarkFactor

(

int

darkFactor

)

Sets the factor to darken the LED in KLed::Off state.

The

Parameters

darkFactor

should be greater than 100, otherwise the LED becomes lighter in KLed::Off state.

Defaults to 300.

See also

QColor

Parameters

darkFactor

Sets the factor to darken the LED. Sets the factor to darken the LED.

Definition at line 209 of file kled.cpp.

void KLed::setLook

(

Look

look

)

Sets the look of the widget.

The look may be Flat, Raised or Sunken.

The widget calls the update() method, so it will be updated when entering the main event loop.

See also

Look

Parameters

look	New look of the LED. Sets LED look.

Definition at line 223 of file kled.cpp.

void KLed::setShape

(

Shape

shape

)

Set the shape of the LED.

Parameters

shape

The LED shape. Set LED shape.

Definition at line 191 of file kled.cpp.

void KLed::setState

(

State

state

)

Sets the state of the widget to On or Off.

The widget will be painted immediately.

See also

on() off() toggle()

Parameters

state

The LED state: on or off. Set LED state.

Definition at line 182 of file kled.cpp.

Shape KLed::shape

(

)

const

Returns the current shape of the widget.

See also

Shape Returns LED shape.

QSize KLed::sizeHint ( void  ) const

virtual

Definition at line 253 of file kled.cpp.

State KLed::state

(

)

const

Returns the current state of the widget (on/off).

See also

State Returns LED state.

void KLed::toggle ( )

slot

Toggles the state of the led from Off to On or vice versa.

The widget repaints itself immediately.

Definition at line 232 of file kled.cpp.

void KLed::updateCachedPixmap ( )

protected

invalidates caches after property changes and calls update()

Definition at line 266 of file kled.cpp.

Property Documentation

QColor KLed::color

readwrite

Definition at line 51 of file kled.h.

int KLed::darkFactor

readwrite

Definition at line 52 of file kled.h.

KLed::Look KLed::look

readwrite

Definition at line 50 of file kled.h.

KLed::Shape KLed::shape

readwrite

Definition at line 49 of file kled.h.

KLed::State KLed::state

readwrite

Definition at line 48 of file kled.h.

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

• kled.h
• kled.cpp