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RLinetypePattern.cpp
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RLinetypePattern.cpp
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/**
* Copyright (c) 2011-2013 by Andrew Mustun. All rights reserved.
*
* This file is part of the QCAD project.
*
* QCAD is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* QCAD is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with QCAD.
*/
#include <QIcon>
#include "RLinetypePattern.h"
#include "RMath.h"
#include "RDebug.h"
RLinetypePattern::RLinetypePattern(const QString& name, const QString& description, int num...)
: name(name), description(description), symmetrical(NULL) {
QList<double> dashes;
va_list vl;
va_start(vl, num);
for (int i=0; i<num; ++i) {
dashes.append(va_arg(vl, double));
}
va_end(vl);
set(dashes);
}
RLinetypePattern::RLinetypePattern(const QString& name, const QString& description, const QList<double>& dashes)
: name(name), description(description), symmetrical(NULL) {
set(dashes);
}
RLinetypePattern::RLinetypePattern() :
symmetrical(NULL) {
}
RLinetypePattern::RLinetypePattern(const QString& name, const QString& description) :
name(name), description(description), symmetrical(NULL) {
}
RLinetypePattern::RLinetypePattern(const RLinetypePattern& other) :
symmetrical(NULL) {
operator =(other);
}
RLinetypePattern::~RLinetypePattern() {
if (symmetrical != NULL) {
delete[] symmetrical;
}
}
//RLinetypePattern::RLinetypePattern(const QString& name, int num, double* pattern)
// : name(name), num(0), pattern(), symmetrical(NULL) {
// QList<double> dashes;
// for (int i = 0; i < num; ++i) {
// dashes.append(pattern[i]);
// }
// set(dashes);
//}
void RLinetypePattern::set(const QList<double>& dashes) {
if (symmetrical != NULL) {
delete[] symmetrical;
}
pattern = dashes;
int num = pattern.length();
symmetrical = new bool[num];
for (int i = 0; i < num; ++i) {
symmetrical[i] = true;
for (int a = 1; a < num; ++a) {
if (fabs(pattern[ RMath::absmod((i-a), num) ]
- pattern[ RMath::absmod((i+a), num) ] ) > 0.1) {
symmetrical[i] = false;
break;
}
}
}
}
RLinetypePattern& RLinetypePattern::operator=(const RLinetypePattern& other) {
if (this == &other) {
return *this;
}
if (symmetrical != NULL) {
delete symmetrical;
}
if (!other.pattern.isEmpty()) {
pattern = other.pattern;
int num = pattern.length();
symmetrical = new bool[num];
for (int i = 0; i < num; ++i) {
symmetrical[i] = other.symmetrical[i];
}
} else {
pattern.clear();
symmetrical = NULL;
}
name = other.name;
description = other.description;
return *this;
}
bool RLinetypePattern::operator==(const RLinetypePattern& other) const {
if (pattern.length()!=other.pattern.length()) {
return false;
}
if (name.toLower()!=other.name.toLower()) {
return false;
}
for (int i = 0; i < other.pattern.length(); ++i) {
if (pattern[i] != other.pattern[i]) {
return false;
}
if (symmetrical[i] != other.symmetrical[i]) {
return false;
}
}
return true;
}
void RLinetypePattern::scale(double factor) {
for (int i = 0; i < pattern.length(); ++i) {
pattern[i] *= factor;
}
}
/**
* \return Line pattern that can be used for a QPen to render screen
* optimized patterns. Empty vector for continuous.
*/
QVector<qreal> RLinetypePattern::getScreenBasedLinetype(bool metric) {
QVector<qreal> ret;
if (pattern.length()>1) {
for (int i = 0; i < pattern.length(); ++i) {
double dash = fabs(pattern[i]);
if (!metric) {
dash*=25.4;
}
ret << ceil(dash);
}
}
return ret;
}
double RLinetypePattern::getDelta(double pos) const {
if (pos < 0) {
pos += (RMath::trunc(pos / getPatternLength()) + 1) * getPatternLength();
} else if (pos > getPatternLength()) {
pos -= RMath::trunc(pos / getPatternLength()) * getPatternLength();
}
double total = 0.0;
for (int i = 0; i < pattern.length(); ++i) {
total += fabs(pattern[i]);
if (total >= pos) {
if (pattern[i] < 0) {
return -(total - pos);
}
return total - pos;
}
}
qWarning("RLinetypePattern::getDelta: invalid pos argument");
return 0.0;
}
bool RLinetypePattern::hasDashAt(double pos) const {
if (pos < 0) {
pos += (RMath::trunc(pos / getPatternLength()) + 1) * getPatternLength();
} else if (pos > getPatternLength()) {
pos -= RMath::trunc(pos / getPatternLength()) * getPatternLength();
}
double total = 0.0;
for (int i = 0; i < pattern.length(); ++i) {
total += fabs(pattern[i]);
if (total > pos) {
return pattern[i] > 0;
}
}
qWarning("RLinetypePattern::hasDashAt: invalid pos argument");
return false;
}
bool RLinetypePattern::isSymmetrical(int i) const {
if (i >= pattern.length()) {
return false;
}
return symmetrical[i];
}
bool RLinetypePattern::isValid() const {
return pattern.length()>0;
}
int RLinetypePattern::getNumDashes() const {
return pattern.length();
}
QString RLinetypePattern::getName() const {
return name;
}
void RLinetypePattern::setName(const QString& n) {
name = n;
}
QString RLinetypePattern::getDescription() const {
return description;
}
void RLinetypePattern::setDescription(const QString& d) {
description = d;
}
QIcon RLinetypePattern::getIcon() const {
// TODO:
return QIcon();
}
QList<double> RLinetypePattern::getPattern() const {
return pattern;
}
double RLinetypePattern::getPatternLength() const {
double ret=0;
for (int i=0; i<pattern.length(); ++i) {
ret += fabs(pattern[i]);
}
return ret;
}
double RLinetypePattern::getDashLengthAt(int i) const {
if (i>=0 && i<pattern.length()) {
return pattern[i];
}
return 0.0;
}
double RLinetypePattern::getLargestGap() const {
double ret = 0.0;
for(int i=0;i<pattern.length();++i) {
if (pattern[i]<0.0 && fabs(pattern[i])>ret) {
ret = fabs(pattern[i]);
}
}
return ret;
}
/**
* Loads all linetype patterns in the given file into memory.
*/
QList<QPair<QString, RLinetypePattern*> > RLinetypePattern::loadAllFrom(const QString& fileName) {
qDebug() << "loading patterns from file: " << fileName;
QList<QPair<QString, RLinetypePattern*> > ret;
// Open lin file:
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly)) {
qWarning() << "RLinetypePattern::loadAllFrom: Cannot open lin file: " << fileName;
return ret;
}
QTextStream ts(&file);
ts.setCodec("UTF-8");
QString line;
RLinetypePattern* ltpattern = NULL;;
// Read line by line:
while (!ts.atEnd()) {
line = ts.readLine();
// handle comments (;):
int semi = line.indexOf(';');
if (semi==0) {
continue;
}
if (semi!=-1) {
line = line.left(semi);
}
// skip empty lines:
if (line.isEmpty()) {
continue;
}
// name / description:
if (line.at(0)=='*') {
QRegExp rx("\\*([^,]*)(?:,\\s*(.*))?", Qt::CaseSensitive, QRegExp::RegExp2);
rx.indexIn(line);
QString name = rx.cap(1);
QString description = rx.cap(2);
ltpattern = new RLinetypePattern(name, description);
ret.append(qMakePair(name, ltpattern));
continue;
}
// linetype pattern definition:
if (ltpattern!=NULL) {
QStringList parts = line.split(',', QString::SkipEmptyParts);
if (parts.at(0).startsWith("A", Qt::CaseInsensitive)) {
parts.removeFirst();
}
QList<double> dashes;
for (int i = 0; i < parts.length(); i++) {
if (parts.at(i).startsWith("[", Qt::CaseInsensitive)) {
dashes.clear();
delete ltpattern;
ret.removeLast();
break;
} else {
dashes.append(parts.at(i).toDouble());
}
}
if (dashes.count() > 0) {
for (int i = 0; i < dashes.count(); i++) {
if (dashes.at(i) == 0) {
// subtract half of 0.1 (0.05) from previous space
// and following space (if any)
// The spaces are negative numbers so we add 0.05
if (i == 0) {
dashes.replace(i, 0.1);
dashes.replace(i + 1, dashes.at(i + 1) + 0.1);
} else if (i > 0 && i < dashes.count() - 1) {
dashes.replace(i - 1, dashes.at(i - 1) + 0.05);
dashes.replace(i, 0.1);
dashes.replace(i + 1, dashes.at(i + 1) + 0.05);
} else if (i == dashes.count() - 1) {
dashes.replace(i - 1, dashes.at(i - 1) + 0.1);
dashes.replace(i, 0.1);
}
}
}
ltpattern->set(dashes);
}
}
}
return ret;
}
/**
* Stream operator for QDebug
*/
QDebug operator<<(QDebug dbg, const RLinetypePattern& p) {
dbg.nospace() << "RLinetypePattern(" << p.getName() << ", " << p.getDescription() << ", " << p.getPatternLength() << ", ";
for (int i=0;i<p.getNumDashes();++i) {
if (i!=0) {
dbg.nospace() << ",";
}
dbg.nospace() << p.getDashLengthAt(i);
}
dbg.nospace() << ")";
return dbg.space();
}