#include "textitem.h"
#include "elements.h"
#include "itabs.h"
extern QBrush *tb;
extern QPen *tp;
extern QSettings *conf;

TextItem::TextItem( NodeItem *from, NodeItem *to )
	: EdgeItem(from, to), QGraphicsSimpleTextItem ("Text")
{
	item_type = type();
	from->setOutEdge( (EdgeItem *)this );
	setFlag(ItemIsSelectable);
	align = Qt::AlignLeft;
}
TextItem::TextItem( QDomElement el )
	: EdgeItem(new NodeItem(), new NodeItem()), QGraphicsSimpleTextItem()
{	
    	item_type = type();
	setPen( *tp );
	ipen = pen();
	ipen.setColor(QColor(el.attribute("color")));
	setPen(ipen);
	int x1 = el.attribute("x1").toInt(), y1 = el.attribute("y1").toInt(), x2 = el.attribute("x2").toInt(), y2 = el.attribute("y2").toInt();
	align = (QFlags<Qt::AlignmentFlag>)el.attribute("align").toInt();
	QDomCDATASection cd = el.firstChild().toCDATASection ();
	setText(cd.data());
	QFont f;
	f.fromString(el.attribute("font"));
	setFont(f);
	setPos(x1,y1);
	ww = x2-x1;
	hh = y2-y1;
	setFromPoint(x1,y1);
	setToPoint(x2, y2);
	setCursor(QCursor(Qt::SizeAllCursor));
	setFlag(ItemIsSelectable);
	setFlag(ItemIsMovable);

}
void TextItem::setTabs( QTabWidget *properties) 
{
	PositionTab *ptab = new PositionTab(this);
	properties->addTab(ptab, QObject::tr("Position"));
	TextTab *ttab = new TextTab(this);
	properties->addTab(ttab, QObject::tr("Text"));
	TextStyleTab *tstab = new TextStyleTab(this);
	properties->addTab(tstab, QObject::tr("Style"));

}
void TextItem::setFromPoint( int x, int y )
{
	setBlock(true);
	setPos(x,y);
	ww = ww+(x1-x);
	hh = hh+(y1-y);
	x1 = x;
	y1 = y;
	
	from_node->setPos(x,y);
	emit position_changed(this);
	setBlock(false);
}
void TextItem::setToPoint( int x, int y )
{
//	setPos(x,y);
	setBlock(true);
	ww = x-x1;
	hh = y-y1;
	qDebug("ww: %i", ww);
	update();
	to_node->setPos(x,y);
	emit position_changed(this);
	setBlock(false);
}
QVariant TextItem::itemChange(GraphicsItemChange change, const QVariant &value) {
	if(block()) {return QGraphicsSimpleTextItem::itemChange(change, value);}
//	if(block()) {return -1;}
	setBlock(true);
	if(change == ItemSelectedChange) {
		if(value.toBool()) {
			emit item_selected(this);
			from_node->show();
			to_node->show();
		} else {
			emit item_selected(0);
			from_node->hide();
			to_node->hide();
		}
	} else if (change == ItemPositionChange) {
		QRectF r = sceneBoundingRect();
		QPointF newPos = value.toPointF();
		x1=int(newPos.x());
		y1=int(newPos.y());
		from_node->setPos(r.x(),r.y());
		to_node->setPos(r.x()+ww, r.y()+hh);
		emit position_changed(this);
	}  
	setBlock(false);
	return QGraphicsSimpleTextItem::itemChange(change, value);
}
void TextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
	QString txt = text();
	txt.replace(QLatin1Char('\n'), QChar::LineSeparator);	
	QFont f = QFont(font(), painter->device());
	QFontMetrics metrics(f);
//	f.setPointSizeF(metrics.height());
//	QRectF rect = metrics.boundingRect(txt);
	painter->setPen(ipen);
	QPainterPath clipPath;
	clipPath.addRect(this->boundingRect());
	painter->setClipPath(clipPath);
	
	painter->setFont(f);
	QTextLayout layout(txt, f, painter->device());
//	int leading = metrics.leading();
	int height = 0;
	layout.beginLayout();
	forever {
		QTextLine line = layout.createLine();
		if (!line.isValid())
			break;
	}

	for (int i = 0; i < layout.lineCount(); ++i) {
		QTextLine line = layout.lineAt(i);
		qreal w = line.naturalTextWidth();
//		height += leading+metrics.descent();
		int px = 0;
		if (align == Qt::AlignHCenter) {
			px = int(ww/2 - w / 2);
		} else if (align == Qt::AlignRight) {
			px = int(ww - w);
		}
		line.setPosition(QPoint(px, height));
		height += metrics.height();
	}
	layout.endLayout();		
	layout.draw(painter, QPointF(0,0));
	if (option->state & (QStyle::State_Selected | QStyle::State_HasFocus)) {
		painter->setPen(QPen(Qt::black, 0));
		painter->setBrush(Qt::NoBrush);
		QRectF r = this->boundingRect();
		r.setWidth(r.width()-1);
		r.setHeight(r.height()-1);
		painter->drawRect(r);
	}
}
void TextItem::paintItem( int x, int y, QPainter *pp, QPrinter *pp1, qreal scale ) 
{
	QString txt = text();
	txt.replace(QLatin1Char('\n'), QChar::LineSeparator);	
	QFont f = QFont(font(), pp1);
	QFontMetrics metrics(f);
	pp->setPen(ipen);

	QPointF p = pos();
//	f.setPixelSize(int(metrics.height()*scale));
	QRectF rect = metrics.boundingRect(txt);
	p.setX(p.x()*scale+x);
	p.setY(p.y()*scale+y);
	pp->setFont(f);
	QTextLayout layout(txt, f, pp1);
	int leading = metrics.leading();
	int height = 0;
	layout.beginLayout();
	forever {
		QTextLine line = layout.createLine();
		if (!line.isValid())
			break;
	}
	int ww1 = ww*scale;
	for (int i = 0; i < layout.lineCount(); ++i) {
		QTextLine line = layout.lineAt(i);
		qreal w = line.naturalTextWidth();
		qreal wq = line.width();
//		height += leading+metrics.descent();
		int px = 0;
		if (align == Qt::AlignHCenter) {
			px = int(ww1/2 - w / 2);
		
		} else if (align == Qt::AlignRight) {
			px = int(ww1 - w);
		}
		line.setPosition(QPoint(px, height));
		height += metrics.height();
	}

	layout.endLayout();		
	layout.draw(pp, p);
}

QDomElement TextItem::toXml(QDomDocument doc) {
	qDebug("1");
	QDomElement l =doc.createElement("text");
	l.setAttribute("x1",x());
	l.setAttribute("y1",y());
	l.setAttribute("x2",x()+ww);
	l.setAttribute("y2",y()+hh);
	l.setAttribute("color",ipen.color().name());
	l.setAttribute("font",font().toString());
	l.setAttribute("align",align);
	qDebug("2");
	QDomCDATASection cd = doc.createCDATASection(text());
	l.appendChild(cd);
	return l;
}