diff -r 000000000000 -r 5c5b4464b24f misc.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc.cpp	Fri Mar 05 20:16:46 2010 +0000
@@ -0,0 +1,238 @@
+#include <qregexp.h>
+#include <qpoint.h>
+
+#include <math.h>
+
+#include "misc.h"
+
+
+ostream &operator<< (ostream &stream, QPoint const &p)
+{ 
+    return (stream << "(" << p.x() << "," << p.y() << ")");
+}
+
+float getAngle(const QPoint &p)
+{	
+	// Calculate angle of vector to y-axis
+	if (p.y()==0)
+	{
+		if (p.x()>=0)
+			return M_PI_2;
+		else
+			return 3* M_PI_2;
+	} else
+	{
+		if (p.y()>0) 
+			return (float)(M_PI  - atan ( (double)(p.x()) / (double)(p.y()) ) );
+		else	
+			if (p.x()<0)
+				return (float)( 2*M_PI - atan ( (double)(p.x()) / (double)(p.y()) ) );
+			else	
+				return (float)( - atan ( (double)(p.x()) / (double)(p.y()) ) );
+	}	
+}
+
+QPoint normalise(const QPoint &p)
+{	
+	// Calculate normalised position (fixed length) 
+
+	double px=p.x();
+	double py=p.y();
+	double x;
+	double y;
+	double r=150;
+
+	if (px==0)
+	{
+		x=0;
+		if (py>=0)
+			y=r;
+		else
+			y=-r;
+	} else
+	{
+		double sign;
+		double a;
+		if (px>0) 
+			sign=1; 
+		else 
+			sign=-1;
+		
+		a=atan (py / px);
+		x=cos (a) * r *sign;
+		y=sin (a) * r *sign;
+	}	
+	return QPoint ((int) (x),(int) (y));
+}
+
+QString maskPath(QString p)
+{
+	// Change " " to "\ " to enable blanks in filenames
+	p=p.replace(QChar('&'),"\\&");
+	return p.replace(QChar(' '),"\\ ");
+}
+
+QString convertToRel (const QString &src, const QString &dst)
+{
+	QString s=src;
+	QString d=dst;
+	int i;
+	// Find relative path from src to dst
+
+	// Remove the first "/"
+	if (s.section ("/",0,0).isEmpty()) 
+	{
+		s=s.right (s.length()-1);
+		d=d.right (d.length()-1);
+	}
+	
+	// remove identical left parts
+	while (s.section("/",0,0) == d.section("/",0,0) ) 
+	{
+		i=s.find ("/");
+		s=s.right (s.length()-i-1);
+		d=d.right (d.length()-i-1);
+	}
+
+	int srcsep=s.contains("/");
+	int dstsep=d.contains("/");
+	if (srcsep >=  dstsep )
+	{
+		// find path to go up first and then back to dst
+		i=1;
+		while (i<=srcsep) 
+		{
+			d="../"+d;
+			i++;
+		}	
+	}
+	return d;
+}
+
+// returns masked "<" ">" "&"
+QString quotemeta(const QString &s)
+{
+	QString r=s;
+    QRegExp  rx("&(?!amp;)");
+    r.replace ( rx,"&amp;");
+    rx.setPattern( ">");
+    r.replace ( rx,"&gt;");
+    rx.setPattern( "<");
+    r.replace ( rx,"&lt;");
+    rx.setPattern( "\"");
+    r.replace ( rx,"&quot;");
+    return r;
+}
+
+int max(int a, int b)
+{
+	if (a>b)
+		return a;
+	return b;
+}
+
+int xmlObj::actindent=0;		// make instance of actindent
+
+xmlObj::xmlObj()
+{
+    indentwidth=4;
+}
+
+
+// returns <s at />
+QString xmlObj::singleElement(QString s, QString at)
+{
+    return indent() + "<" + s +" " + at +" " + "/>\n";
+}
+
+// returns <s>
+QString xmlObj::beginElement(QString s)
+{
+    return indent() + "<" + s + ">\n";
+}
+
+// returns <s at>
+QString xmlObj::beginElement(QString s, QString at)
+{
+    return indent() + "<" + s + " " + at + ">\n";
+}
+
+// returns </s>
+QString xmlObj::endElement(QString s)
+{
+    return indent() + "</" + s + ">\n";
+}
+
+// returns  at="val"
+QString xmlObj::attribut(QString at, QString val)
+{
+    return " " + at + "=\"" + quotemeta (val) + "\""; 
+}
+
+// returns <s> val </s>
+QString xmlObj::valueElement(QString el, QString val)
+{
+    return indent() + "<" + el + ">" + quotemeta(val) + "</" +el + ">\n";
+}
+
+// returns <s at> val </s>
+QString xmlObj::valueElement(QString el, QString val, QString at)
+{
+    return indent() + "<" + el + " " + at + ">" + quotemeta(val) + "</" +el + ">\n";
+}
+
+void xmlObj::incIndent()
+{
+    actindent++;
+}	
+
+void xmlObj::decIndent()
+{
+    actindent--;
+    if (actindent<0) actindent=0;
+}	
+
+QString xmlObj::indent()
+{
+    QString s;
+    int i;
+    for (i=0; i<actindent*indentwidth; i++)
+    {
+		s= s + " ";
+    }
+    return s;
+}	
+
+
+
+ImagePreview::ImagePreview (QWidget *parent=0): QLabel (parent)
+{
+}
+
+void ImagePreview::previewUrl( const QUrl &u )
+{
+    QString path = u.path();
+    QPixmap pix( path );
+    if ( pix.isNull() )
+        setText( QObject::tr("This is not an image.") );
+    else
+	{
+		float max_w=300;
+		float max_h=300;
+		float r;
+		if (pix.width()>max_w)
+		{
+			r=max_w / pix.width();
+			pix.resize(lrint(pix.width()*r), lrint(pix.height()*r));
+			// TODO not a resize, but a shrink/enlarge is needed here...
+		}
+		if (pix.height()>max_h)
+		{
+			r=max_h / pix.height();
+			pix.resize(lrint(pix.width()*r), lrint(pix.height()*r));
+			// TODO not a resize, but a shrink/enlarge is needed here...
+		}
+        setPixmap( pix );
+	}	
+}
+