#include <QtCore/QDebug>
#include <QtGui/QPainterPath>

#include "stfreader.h"
#include "stfgraphicsitem.h"

class StfToGraphicsPathItems : public StfReader::StrokeHandler {
	QGraphicsItem *parent;
	QPainterPath path;
	QRectF bound;

public:
	StfToGraphicsPathItems(QGraphicsItem* parent)
		: parent(parent), path(), bound(0.0, 0.0, 1.0, 1.0) {
	}

	~StfToGraphicsPathItems() {
	}

	bool startStroke(const QPoint& p, int force, quint64 time) {
		Q_UNUSED(force);
		Q_UNUSED(time);
		path = QPainterPath(QPointF(p));
		return true;
	}

	bool strokePoint(const QPoint& p, int force, quint64 time) {
		Q_UNUSED(force);
		Q_UNUSED(time);
		path.lineTo(QPointF(p));
		return true;
	}

	bool endStroke() {
		bound |= path.boundingRect();
		new QGraphicsPathItem(path, parent);
		/* Parent will take the child down with him when deleted. */
		return true;
	}

	const QRectF& boundingRect() {
		return bound;
	}
};

StfGraphicsItem::StfGraphicsItem(QIODevice *dev, QGraphicsItem *parent) :
	QGraphicsItem(parent)
{
	setFlags(ItemHasNoContents);

	StfToGraphicsPathItems h(this);
	StfReader r;
	r.setStrokeHandler(&h);
	if (r.parse(dev)) {
		bbox = h.boundingRect();
	}
}

QRectF StfGraphicsItem::boundingRect() const
{
	return bbox;
}

void StfGraphicsItem::paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *)
{
	/* Intentionally empty; ItemHasNoContents; children will do the painting. */
}

int StfGraphicsItem::type() const
{
	return Type;
}