led.h

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/**
 * @file led.h an led in qt
 *
 * @author unknown
 */

#ifndef _LED_H_
#define _LED_H_

#include <QtDesigner/QtDesigner>
#include <QWidget>

class QTimer;

class LED : public QWidget
{
  Q_OBJECT

  Q_PROPERTY(double diameter READ diameter WRITE setDiameter) // mm
  Q_PROPERTY(QColor color READ color WRITE setColor)
  Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment)
  Q_PROPERTY(bool state READ state WRITE setState)
  Q_PROPERTY(bool flashing READ isFlashing WRITE setFlashing)
  Q_PROPERTY(int flashRate READ flashRate WRITE setFlashRate)

public:
  explicit LED(QWidget* parent=0);
  ~LED();

  double diameter() const;
  void setDiameter(double diameter);

  QColor color() const;
  void setColor(const QColor& color);

  Qt::Alignment alignment() const;
  void setAlignment(Qt::Alignment alignment);

  bool state() const;

  bool isFlashing() const;

  int flashRate() const;

public slots:
  void setState(bool state);
  void toggleState();
  void setFlashing(bool flashing);
  void setFlashRate(int rate);
  void startFlashing();
  void stopFlashing();

public:
  int heightForWidth(int width) const;
  QSize sizeHint() const;
  QSize minimumSizeHint() const;

protected:
  void paintEvent(QPaintEvent* event);

private:
  double diameter_;
  QColor color_;
  Qt::Alignment alignment_;
  bool initialState_;
  bool state_;
  int flashRate_;
  bool flashing_;

  //
  // Pixels per mm for x and y...
  //
  int pixX_, pixY_;

  //
  // Scaled values for x and y diameter.
  //
  int diamX_, diamY_;

  QRadialGradient gradient_;
  QTimer* timer_;
};

#endif