headingobj.cpp
author insilmaril
Tue, 15 Jan 2008 13:06:59 +0000
changeset 652 700553af9ca5
parent 568 b44cc0d3ed4a
child 657 8e596f73f258
permissions -rw-r--r--
more changes for multiple mapCenters
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#include "headingobj.h"
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#include <qregexp.h>
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/////////////////////////////////////////////////////////////////
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// HeadingObj
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/////////////////////////////////////////////////////////////////
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HeadingObj::HeadingObj() : MapObj()
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{
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//    cout << "Const HeadingObj ()\n";
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    init ();
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}
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HeadingObj::HeadingObj(QGraphicsScene *s) :MapObj(s)
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{
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//    cout << "Const HeadingObj (s)\n";
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    init ();
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}
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HeadingObj::~HeadingObj()
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{
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//	cout << "Destr. HeadingObj "<<heading.ascii()<<endl;
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	while (!textline.isEmpty())
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		delete textline.takeFirst();
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}
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void HeadingObj::init()
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{
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    textwidth=40;
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    color=QColor ("black");
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    font=QFont();
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	heading="";
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}
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void HeadingObj::copy(HeadingObj *other)
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{
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    MapObj::copy (other);
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    textwidth=other->textwidth;
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    color=other->color;
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    font=other->font;
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    setText (other->text() );
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}
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void HeadingObj::move(double x, double y)
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{
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    MapObj::move(x,y);
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    qreal h;	// height of a textline
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    qreal ho;	// offset of height while drawing all lines
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    if (!textline.isEmpty() )
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		h=textline.first()->boundingRect().height();
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    else
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		h=2;
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    ho=0;
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	for (int i=0; i<textline.size(); ++i)
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    {
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		textline.at(i)->setPos(x,y+ho);
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		ho=ho+h;
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    }	
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}
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void HeadingObj::moveBy(double x, double y)
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{
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    move (x+absPos.x(),y+absPos.y() );
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}
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void HeadingObj::positionBBox()
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{
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    bbox.setX (absPos.x());
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    bbox.setY (absPos.y());
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}
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void HeadingObj::calcBBoxSize()
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{	
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	qreal w=0;
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	qreal h=0;
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	// Using Backspace an empty heading might easily be created, then there
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	// would be textline.first()==NULL This can be worked around by the following, but
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	// then no selection would be visible, thus we prevent it in ::setText()
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	if (!textline.isEmpty() )
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	{
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		for (int i=0; i<textline.size(); i++)
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		{
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			h+=textline.at(i)->boundingRect().height();
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			if (w<textline.at(i)->boundingRect().width() )
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				w=textline.at(i)->boundingRect().width();
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		}	
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	} 
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    bbox.setSize (QSizeF(w,h));
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}
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//QGraphicsSimpleTextItem* HeadingObj::newLine(QString s)
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QGraphicsTextItem* HeadingObj::newLine(QString s)
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{
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    //QGraphicsSimpleTextItem *t=new QGraphicsSimpleTextItem (s,0,scene);
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    QGraphicsTextItem *t=new QGraphicsTextItem (s,0,scene);
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    t->setFont (font);
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    t->setZValue(Z_TEXT);
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	// TextItem
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    t->setDefaultTextColor(color);
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	// SimpleTextItem
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    //t->setBrush(color);
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    return t;
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}
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void HeadingObj::setText (QString s)
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{
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    heading=s;
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    // remove old textlines and prepare generating new ones
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	while (!textline.isEmpty())
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		delete textline.takeFirst();
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	if (s.startsWith("<html>"))
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	{
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		QGraphicsTextItem *t=new QGraphicsTextItem ();
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		t->setFont (font);
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		t->setZValue(Z_TEXT);
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		t->setHtml (s);
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		t->setDefaultTextColor(color);
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		scene->addItem (t);
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		textline.append (t);
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		setVisibility (visible);
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		move (absPos.x(),absPos.y());
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		calcBBoxSize();
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		return;
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	}
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	// prevent empty textline, so at least a small selection stays
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	// visible for this heading
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	if (s.length()==0) s="  ";
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    int i=0;	// index for actual search for ws
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    int j=0;	// index of last ws
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	int k=0;	// index of "<br>" or similar linebreak
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	int br=0;	// width of found break, e.g. for <br> it is 4
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	QRegExp re("<br.*/>");
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	re.setMinimal (true);
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    // set the text and wrap lines
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    while (s.length()>0)
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    {
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		// ok, some people wanted manual linebreaks, here we go
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		k=re.search (s,i);
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		if (k>=0)
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		{
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			br=re.cap(0).length();
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			i=k;
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		} else
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			i=s.find (" ",i,false);
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		if (i<0 && j==0)
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		{   // no ws found at all in s
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			// append whole s
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			textline.append (newLine(s));
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			s="";
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		} else
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		{
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			if (i<0 && j>0)
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			{	// no ws found in actual search
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				if (s.length()<=textwidth)
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				{
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					textline.append (newLine(s));
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					s="";
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				} else
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				{
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					textline.append (newLine(s.left(j)));
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					s=s.mid(j+1,s.length());
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					j=0;
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				}		    
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			} else
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			{
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				if (i>= 0 && i<=static_cast <int> (textwidth))
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				{   // there is a ws in textwidth
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					if (br>0)
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					{
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						// here is a linebreak
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						textline.append (newLine(s.left(i)));
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						s=s.mid(i+br,s.length());
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						i=0;
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						j=0;
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						br=0;
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					} else
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					{
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						j=i;
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						i++;
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					}
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				} else
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				{
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					if (i>static_cast <int> (textwidth)  )
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					{	
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						if (j>0)
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						{   // a ws out of textwidth, but we have also one in
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							textline.append (newLine(s.left(j)));
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							s=s.mid(j+1,s.length());
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							i=0;
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							j=0;
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						} else
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						{   // a ws out of text, but none in
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							textline.append (newLine(s.left(i)));
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							s=s.mid(i+1,s.length());
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							i=0;
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						}
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					}
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				} 
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			}	  
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		}		    
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    }
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	setVisibility (visible);
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	move (absPos.x(),absPos.y());
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	calcBBoxSize();
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}
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QString HeadingObj::text ()
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{
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    return heading;
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}
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void HeadingObj::setFont (QFont f)
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{
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    if (font!=f) 
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    {
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		font=f;
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		setText (text());
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    }
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}
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QFont HeadingObj::getFont()
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{
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    return font;
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}    
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void HeadingObj::setColor (QColor c)
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{
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    if (color!=c)
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    {
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		color=c;
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		for (int i=0; i<textline.size(); ++i)
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			// TextItem
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			textline.at(i)->setDefaultTextColor(c);
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			// SimpleTextItem
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			//textline.at(i)->setBrush(c);
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    }	    
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}
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QColor HeadingObj::getColor()
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{
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    return color;
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}    
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void HeadingObj::setVisibility (bool v)
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{
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    MapObj::setVisibility(v);
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	for (int i=0; i<textline.size(); ++i)
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		if (v)
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			textline.at(i)->show();
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		else
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			textline.at(i)->hide();
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}
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qreal HeadingObj::getHeight ()
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{
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	return bbox.height();
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}
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qreal HeadingObj::getWidth()
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{
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	return bbox.width();
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}
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