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misc.cpp
author insilmaril
Wed, 11 Apr 2007 09:21:17 +0000
changeset 456 8cc3cb71f345
parent 413 c3f7beb4e9f4
child 617 7ee5bf3647d3
permissions -rw-r--r--
Updated documentation about macros 
     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 	return "(" + QString("%1").arg(p.x()) +","+ QString ("%1").arg (p.y()) +")";

    17 }

    18 

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

    20 { 

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

    22 	return stream;

    23 }

    24 

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

    26 { 

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

    28 	return stream;

    29 }

    30 

    31 qreal getAngle(const QPointF &p)

    32 {	

    33 	// Calculate angle of vector to y-axis

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

    35 	{

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

    37 			return M_PI_2;

    38 		else

    39 			return 3* M_PI_2;

    40 	} else

    41 	{

    42 		if (p.y()>0) 

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

    44 		else	

    45 			if (p.x()<0)

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

    47 			else	

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

    49 	}	

    50 }

    51 

    52 QPointF normalise(const QPointF &p)

    53 {	

    54 	// Calculate normalised position (fixed length) 

    55 

    56 	qreal px=p.x();

    57 	qreal py=p.y();

    58 	qreal x;

    59 	qreal y;

    60 	qreal r=150;

    61 

    62 	if (px==0)

    63 	{

    64 		x=0;

    65 		if (py>=0)

    66 			y=r;

    67 		else

    68 			y=-r;

    69 	} else

    70 	{

    71 		qreal sign;

    72 		qreal a;

    73 		if (px>0) 

    74 			sign=1; 

    75 		else 

    76 			sign=-1;

    77 		

    78 		a=atan (py / px);

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

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

    81 	}	

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

    83 }

    84 

    85 

    86 // returns masked "<" ">" "&"

    87 QString quotemeta(const QString &s)

    88 {

    89 	QString r=s;

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

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

    92     rx.setPattern( ">");

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

    94     rx.setPattern( "<");

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

    96     rx.setPattern( "\"");

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

    98     return r;

    99 }

   100 

   101 

   102 qreal max(qreal a, qreal b)

   103 {

   104 	if (a>b)

   105 		return a;

   106 	return b;

   107 }

   108 

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

   110 

   111 xmlObj::xmlObj()

   112 {

   113     indentwidth=4;

   114 }

   115 

   116 

   117 // returns <s at />

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

   119 {

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

   121 }

   122 

   123 // returns <s>

   124 QString xmlObj::beginElement(QString s)

   125 {

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

   127 }

   128 

   129 // returns <s at>

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

   131 {

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

   133 }

   134 

   135 // returns </s>

   136 QString xmlObj::endElement(QString s)

   137 {

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

   139 }

   140 

   141 // returns  at="val"

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

   143 {

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

   145 }

   146 

   147 // returns <s> val </s>

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

   149 {

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

   151 }

   152 

   153 // returns <s at> val </s>

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

   155 {

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

   157 }

   158 

   159 void xmlObj::incIndent()

   160 {

   161     actindent++;

   162 }	

   163 

   164 void xmlObj::decIndent()

   165 {

   166     actindent--;

   167     if (actindent<0) actindent=0;

   168 }	

   169 

   170 QString xmlObj::indent()

   171 {

   172     QString s;

   173     int i;

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

   175     {

   176 		s= s + " ";

   177     }

   178     return s;

   179 }	

   180
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