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misc.cpp
author insilmaril
Mon, 10 Apr 2006 11:00:19 +0000
changeset 268 2a6157d381fe
parent 176 f75489896084
child 366 e95081c21da2
permissions -rw-r--r--
switching to KDE icons 
     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 ostream &operator<< (ostream &stream, QPoint const &p)

    15 { 

    16     return (stream << qpointToString(p) );

    17 }

    18 

    19 float getAngle(const QPoint &p)

    20 {	

    21 	// Calculate angle of vector to y-axis

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

    23 	{

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

    25 			return M_PI_2;

    26 		else

    27 			return 3* M_PI_2;

    28 	} else

    29 	{

    30 		if (p.y()>0) 

    31 			return (float)(M_PI  - atan ( (double)(p.x()) / (double)(p.y()) ) );

    32 		else	

    33 			if (p.x()<0)

    34 				return (float)( 2*M_PI - atan ( (double)(p.x()) / (double)(p.y()) ) );

    35 			else	

    36 				return (float)( - atan ( (double)(p.x()) / (double)(p.y()) ) );

    37 	}	

    38 }

    39 

    40 QPoint normalise(const QPoint &p)

    41 {	

    42 	// Calculate normalised position (fixed length) 

    43 

    44 	double px=p.x();

    45 	double py=p.y();

    46 	double x;

    47 	double y;

    48 	double r=150;

    49 

    50 	if (px==0)

    51 	{

    52 		x=0;

    53 		if (py>=0)

    54 			y=r;

    55 		else

    56 			y=-r;

    57 	} else

    58 	{

    59 		double sign;

    60 		double a;

    61 		if (px>0) 

    62 			sign=1; 

    63 		else 

    64 			sign=-1;

    65 		

    66 		a=atan (py / px);

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

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

    69 	}	

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

    71 }

    72 

    73 

    74 // returns masked "<" ">" "&"

    75 QString quotemeta(const QString &s)

    76 {

    77 	QString r=s;

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

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

    80     rx.setPattern( ">");

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

    82     rx.setPattern( "<");

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

    84     rx.setPattern( "\"");

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

    86     return r;

    87 }

    88 

    89 int max(int a, int b)

    90 {

    91 	if (a>b)

    92 		return a;

    93 	return b;

    94 }

    95 

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

    97 

    98 xmlObj::xmlObj()

    99 {

   100     indentwidth=4;

   101 }

   102 

   103 

   104 // returns <s at />

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

   106 {

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

   108 }

   109 

   110 // returns <s>

   111 QString xmlObj::beginElement(QString s)

   112 {

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

   114 }

   115 

   116 // returns <s at>

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

   118 {

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

   120 }

   121 

   122 // returns </s>

   123 QString xmlObj::endElement(QString s)

   124 {

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

   126 }

   127 

   128 // returns  at="val"

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

   130 {

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

   132 }

   133 

   134 // returns <s> val </s>

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

   136 {

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

   138 }

   139 

   140 // returns <s at> val </s>

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

   142 {

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

   144 }

   145 

   146 void xmlObj::incIndent()

   147 {

   148     actindent++;

   149 }	

   150 

   151 void xmlObj::decIndent()

   152 {

   153     actindent--;

   154     if (actindent<0) actindent=0;

   155 }	

   156 

   157 QString xmlObj::indent()

   158 {

   159     QString s;

   160     int i;

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

   162     {

   163 		s= s + " ";

   164     }

   165     return s;

   166 }	

   167
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