#ifndef EVALSPINBOX_H
#define EVALSPINBOX_H

#include <QAbstractSpinBox>
#include <QMouseEvent>
#include "qpievaluator.h"

class QLabel;

class EvalSpinBox: public QAbstractSpinBox
{
	Q_OBJECT
	Q_PROPERTY(double value READ value WRITE setValue NOTIFY valueChanged USER true)
	Q_PROPERTY(QString expression READ expression WRITE setExpression USER true)
	Q_PROPERTY(QString defaultText READ defaultText WRITE setDefaultText)
	Q_PROPERTY(bool clearButtonVisible READ isClearButtonVisible WRITE setClearButtonVisible)
	Q_PROPERTY(int precision READ precision WRITE setPrecision)

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

	double value() const;
	const QString & expression() const;
	const QString & defaultText() const {return dt;}
	bool isClearButtonVisible() const {return cw_visible;}
	bool isCleared() const;
	int precision() const {return precision_;}

	virtual void stepBy(int steps);
	virtual void clear();
	virtual QSize sizeHint() const;

protected:
	QString text() const {return QAbstractSpinBox::text();}

	virtual StepEnabled stepEnabled() const;
	virtual void focusInEvent(QFocusEvent *event);
	virtual void focusOutEvent(QFocusEvent *event);
	virtual void wheelEvent(QWheelEvent *event);

	void stepByDouble(double steps);

	QWidget * status;
	QWidget * cw;
	QPIEvaluator eval;
	QLabel * label;
	QImage icon_ok;
	QImage icon_fail;
	QImage icon_calc;
	QImage icon;
	QImage clear_im;
	QString dt;
	bool cw_visible;
	int precision_;

private:
	bool eventFilter(QObject * o, QEvent * e);
	void resizeEvent(QResizeEvent * );
	void changeEvent(QEvent * e);
	void statusPaintEvent();
	void cwPaintEvent();

private slots:
	void clearMouseRelease(QMouseEvent * e);
	void textChanged_(const QString & text);
	void setExpression_();
	void resizeIcons();

public slots:
	void setExpression(const QString & expr);
	void setValue(double val);
	void setDefaultText(const QString & t);
	void setClearButtonVisible(bool visible);
	void setPrecision(int precision) {precision_ = precision;}

signals:
	void valueChanged(double val);
	void cleared();

};

#endif // EVALSPINBOX_H