smled.hh

// KDE4 Led widget:
//
// this is a copy of the kdelibs4 Led widget; SpectMorph should not
// depend on KDE4 libs, which is why this is included here

/* This file is part of the KDE libraries
    Copyright (C) 1998 Jörg Habenicht (j.habenicht@europemail.com)

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#ifndef SPECTMORPH_LED_HH
#define SPECTMORPH_LED_HH

#include <QWidget>

class QColor;

namespace SpectMorph
{

class Led : public QWidget
{
    Q_OBJECT
    Q_ENUMS( State Shape Look )
    Q_PROPERTY( State state READ state WRITE setState )
    Q_PROPERTY( Shape shape READ shape WRITE setShape )
    Q_PROPERTY( Look look READ look WRITE setLook )
    Q_PROPERTY( QColor color READ color WRITE setColor )
    Q_PROPERTY( int darkFactor READ darkFactor WRITE setDarkFactor )

  public:

    enum State { Off, On };

    enum Shape { Rectangular, Circular };

    enum Look  { Flat, Raised, Sunken };

    explicit Led( QWidget *parent = 0 );

    explicit Led( const QColor &color, QWidget *parent = 0 );

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

    ~Led();

    QColor color() const;

    State state() const;

    Look look() const;

    Shape shape() const;

    int darkFactor() const;

    void setColor( const QColor& color );

    void setState( State state );

    void setLook( Look look );

    void setShape( Shape shape );

    void setDarkFactor( int darkFactor );

    virtual QSize sizeHint() const;
    virtual QSize minimumSizeHint() const;

  public Q_SLOTS:

    void toggle();

    void on();

    void off();

  protected:
    virtual int ledWidth() const;

    virtual void paintFlat();

    virtual void paintRaised();

    virtual void paintSunken();

    virtual void paintRect();

    virtual void paintRectFrame( bool raised );

    void paintEvent( QPaintEvent* );
    void resizeEvent( QResizeEvent* );

    bool paintCachedPixmap();

    void updateCachedPixmap();

    void paintLed(Shape shape, Look look);

  private:
    class Private;
    Private * const d;
};
}

#endif