#include "headingobj.h"

 #include <qregexp.h>

 /////////////////////////////////////////////////////////////////

 // HeadingObj

 /////////////////////////////////////////////////////////////////

 HeadingObj::HeadingObj() : MapObj()

 {

 //    cout << "Const HeadingObj ()\n";

     init ();

 }

 HeadingObj::HeadingObj(QCanvas* c) :MapObj(c)

 {

 //    cout << "Const HeadingObj\n";

     init ();

 }

 HeadingObj::~HeadingObj()

 {

     textline.clear();

 }

 void HeadingObj::init()

 {

     textline.setAutoDelete (TRUE);

     textwidth=40;

     color=QColor ("black");

     font=QFont();

 	heading="";

 }

 void HeadingObj::copy(HeadingObj *other)

 {

     MapObj::copy (other);

     textwidth=other->textwidth;

     color=other->color;

     font=other->font;

     setText (other->text() );

 }

 void HeadingObj::move(double x, double y)

 {

     MapObj::move(x,y);

     int h;	// height of a textline

     int ho;	// offset of height while drawing all lines

     if (textline.first() )

 		h=textline.first()->boundingRect().height();

     else

 		h=2;

     QCanvasText *t;

     ho=0;

     for (t=textline.first(); t; t=textline.next() )

     {

 		t->move(x,y+ho);

 		ho=ho+h;

     }	

 }

 void HeadingObj::moveBy(double x, double y)

 {

     move (x+absPos.x(),y+absPos.y() );

 }

 void HeadingObj::positionBBox()

 {

     bbox.setX (absPos.x());

     bbox.setY (absPos.y());

 }

 void HeadingObj::calcBBoxSize()

 {	

 	int w=0;

 	int h=0;

 	// Using Backspace an empty heading might easily be created, then there

 	// would be textline.first()==NULL This can be worked around by the following, but

 	// then no selection would be visible, thus we prevent it in ::setText()

 	if (!textline.isEmpty() )

 	{

 		QCanvasText *t;

 		for (t=textline.first(); t; t=textline.next() )

 		{

 			h+=t->boundingRect().height();

 			if (w<t->boundingRect().width() )

 				w=t->boundingRect().width();

 		}	

 	} 

     bbox.setSize (QSize(w,h));

 }

 QCanvasText* HeadingObj::newLine(QString s)

 {

     QCanvasText *t;

     t = new QCanvasText(canvas);

     t->setFont (font);

     t->setColor (color);

     t->setZ(Z_TEXT);

     t->setText(s);

 	t->setTextFlags(Qt::AlignLeft);

     t->show();

     return t;

 }

 void HeadingObj::setText (QString s)

 {

     heading=s;

     // remove old textlines and prepare generating new ones

     textline.clear();

 	// prevent empty textline, so at least a small selection stays

 	// visible for this heading

 	if (s.length()==0) s="  ";

     int i=0;	// index for actual search for ws

     int j=0;	// index of last ws

 	int k=0;	// index of "<br>" or similar linebreak

 	int br=0;	// width of found break, e.g. for <br> it is 4

 	QRegExp re("<br.*/>");

 	re.setMinimal (true);

     // set the text and wrap lines

     while (s.length()>0)

     {

 		// ok, some people wanted manual linebreaks, here we go

 		k=re.search (s,i);

 		if (k>=0)

 		{

 			br=re.cap(0).length();

 			i=k;

 		} else

 			i=s.find (" ",i,false);

 		if (i<0 && j==0)

 		{   // no ws found at all in s

 			// append whole s

 			textline.append (newLine(s));

 			s="";

 		} else

 		{

 			if (i<0 && j>0)

 			{	// no ws found in actual search

 				if (s.length()<=textwidth)

 				{

 					textline.append (newLine(s));

 					s="";

 				} else

 				{

 					textline.append (newLine(s.left(j)));

 					s=s.mid(j+1,s.length());

 					j=0;

 				}		    

 			} else

 			{

 				if (i>= 0 && i<=static_cast <int> (textwidth))

 				{   // there is a ws in textwidth

 					if (br>0)

 					{

 						// here is a linebreak

 						textline.append (newLine(s.left(i)));

 						s=s.mid(i+br,s.length());

 						i=0;

 						j=0;

 						br=0;

 					} else

 					{

 						j=i;

 						i++;

 					}

 				} else

 				{

 					if (i>static_cast <int> (textwidth)  )

 					{	

 						if (j>0)

 						{   // a ws out of textwidth, but we have also one in

 							textline.append (newLine(s.left(j)));

 							s=s.mid(j+1,s.length());

 							i=0;

 							j=0;

 						} else

 						{   // a ws out of text, but none in

 							textline.append (newLine(s.left(i)));

 							s=s.mid(i+1,s.length());

 							i=0;

 						}

 					}

 				} 

 			}	  

 		}		    

     }

 	setVisibility (visible);

 	move (absPos.x(),absPos.y());

 	calcBBoxSize();

 }

 QString HeadingObj::text ()

 {

     return heading;

 }

 void HeadingObj::setFont (QFont f)

 {

     if (font!=f) 

     {

 		font=f;

 		setText (text());

     }

 }

 QFont HeadingObj::getFont()

 {

     return font;

 }    

 void HeadingObj::setColor (QColor c)

 {

     if (color!=c)

     {

 		color=c;

 		QCanvasText *t;

 		for (t=textline.first(); t; t=textline.next() )

 			t->setColor(c);

     }	    

 }

 QColor HeadingObj::getColor()

 {

     return color;

 }    

 void HeadingObj::setVisibility (bool v)

 {

     MapObj::setVisibility(v);

     QCanvasText *t;

     for (t=textline.first(); t; t=textline.next() )

 		if (v)

 			t->show();

 		else

 			t->hide();

 }

 int HeadingObj::getHeight ()

 {

 	return bbox.height();

 }

 int HeadingObj::getWidth()

 {

 	return bbox.width();

 }