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misc.cpp
author insilmaril
Thu, 14 Dec 2006 17:01:44 +0000
changeset 411 910ba9fab728
parent 408 c2a05fa925a1
child 413 c3f7beb4e9f4
permissions -rw-r--r--
1.8.61 various fixes, see changelog 
     1 #include <math.h>

     2 

     3 #include <qregexp.h>

     4 #include <qpoint.h>

     5 #include <stdlib.h>

     6 

     7 #include "misc.h"

     8 

     9 QString qpointToString (const QPoint &p)

    10 {

    11 	return "(" + QString("%1").arg(p.x()) +","+ QString ("%1").arg (p.y()) +")";

    12 }

    13 

    14 QString qpointfToString (const QPointF &p)

    15 {

    16 // FIXME check this QT4

    17 	return "(" + QString("%1").arg(p.x()) +","+ QString ("%1").arg (p.y()) +")";

    18 }

    19 

    20 ostream &operator<< (ostream &stream, QPoint const &p)

    21 { 

    22 	stream << "("<<p.x()<<","<<p.y()<<")";

    23 	return stream;

    24 }

    25 

    26 ostream &operator<< (ostream &stream, QPointF const &p)

    27 { 

    28 	stream << "("<<p.x()<<","<<p.y()<<")";

    29 	return stream;

    30 }

    31 

    32 qreal getAngle(const QPointF &p)

    33 {	

    34 	// Calculate angle of vector to y-axis

    35 	if (p.y()==0)

    36 	{

    37 		if (p.x()>=0)

    38 			return M_PI_2;

    39 		else

    40 			return 3* M_PI_2;

    41 	} else

    42 	{

    43 		if (p.y()>0) 

    44 			return (qreal)(M_PI  - atan ( (qreal)(p.x()) / (qreal)(p.y()) ) );

    45 		else	

    46 			if (p.x()<0)

    47 				return (qreal)( 2*M_PI - atan ( (qreal)(p.x()) / (qreal)(p.y()) ) );

    48 			else	

    49 				return (qreal)( - atan ( (qreal)(p.x()) / (qreal)(p.y()) ) );

    50 	}	

    51 }

    52 

    53 QPointF normalise(const QPointF &p)

    54 {	

    55 	// Calculate normalised position (fixed length) 

    56 

    57 	qreal px=p.x();

    58 	qreal py=p.y();

    59 	qreal x;

    60 	qreal y;

    61 	qreal r=150;

    62 

    63 	if (px==0)

    64 	{

    65 		x=0;

    66 		if (py>=0)

    67 			y=r;

    68 		else

    69 			y=-r;

    70 	} else

    71 	{

    72 		qreal sign;

    73 		qreal a;

    74 		if (px>0) 

    75 			sign=1; 

    76 		else 

    77 			sign=-1;

    78 		

    79 		a=atan (py / px);

    80 		x=cos (a) * r *sign;

    81 		y=sin (a) * r *sign;

    82 	}	

    83 	return QPoint ((int) (x),(int) (y));

    84 }

    85 

    86 

    87 // returns masked "<" ">" "&"

    88 QString quotemeta(const QString &s)

    89 {

    90 	QString r=s;

    91     QRegExp  rx("&(?!amp;)");

    92     r.replace ( rx,"&amp;");

    93     rx.setPattern( ">");

    94     r.replace ( rx,"&gt;");

    95     rx.setPattern( "<");

    96     r.replace ( rx,"&lt;");

    97     rx.setPattern( "\"");

    98     r.replace ( rx,"&quot;");

    99     return r;

   100 }

   101 

   102 

   103 qreal max(qreal a, qreal b)

   104 {

   105 	if (a>b)

   106 		return a;

   107 	return b;

   108 }

   109 

   110 int xmlObj::actindent=0;		// make instance of actindent

   111 

   112 xmlObj::xmlObj()

   113 {

   114     indentwidth=4;

   115 }

   116 

   117 

   118 // returns <s at />

   119 QString xmlObj::singleElement(QString s, QString at)

   120 {

   121     return indent() + "<" + s +" " + at +" " + "/>\n";

   122 }

   123 

   124 // returns <s>

   125 QString xmlObj::beginElement(QString s)

   126 {

   127     return indent() + "<" + s + ">\n";

   128 }

   129 

   130 // returns <s at>

   131 QString xmlObj::beginElement(QString s, QString at)

   132 {

   133     return indent() + "<" + s + " " + at + ">\n";

   134 }

   135 

   136 // returns </s>

   137 QString xmlObj::endElement(QString s)

   138 {

   139     return indent() + "</" + s + ">\n";

   140 }

   141 

   142 // returns  at="val"

   143 QString xmlObj::attribut(QString at, QString val)

   144 {

   145     return " " + at + "=\"" + quotemeta (val) + "\""; 

   146 }

   147 

   148 // returns <s> val </s>

   149 QString xmlObj::valueElement(QString el, QString val)

   150 {

   151     return indent() + "<" + el + ">" + quotemeta(val) + "</" +el + ">\n";

   152 }

   153 

   154 // returns <s at> val </s>

   155 QString xmlObj::valueElement(QString el, QString val, QString at)

   156 {

   157     return indent() + "<" + el + " " + at + ">" + quotemeta(val) + "</" +el + ">\n";

   158 }

   159 

   160 void xmlObj::incIndent()

   161 {

   162     actindent++;

   163 }	

   164 

   165 void xmlObj::decIndent()

   166 {

   167     actindent--;

   168     if (actindent<0) actindent=0;

   169 }	

   170 

   171 QString xmlObj::indent()

   172 {

   173     QString s;

   174     int i;

   175     for (i=0; i<actindent*indentwidth; i++)

   176     {

   177 		s= s + " ";

   178     }

   179     return s;

   180 }	

   181
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