Initial commit

src/poi.cpp

@@ -0,0 +1,97 @@
+#include <QFile>
+#include <QSet>
+#include <QList>
+#include "ll.h"
+#include "poi.h"
+
+
+bool POI::loadFile(const QString &fileName)
+{
+	QFile file(fileName);
+	bool ret;
+	int ln = 1;
+
+	_error.clear();
+
+	if (!file.open(QFile::ReadOnly | QFile::Text)) {
+		_error = qPrintable(file.errorString());
+		return false;
+	}
+
+	while (!file.atEnd()) {
+		QByteArray line = file.readLine();
+		QList<QByteArray> list = line.split(',');
+		if (list.size() < 3) {
+			_error = QString("Parse error\nLine %1").arg(ln);
+			return false;
+		}
+
+		qreal lat = list[0].trimmed().toDouble(&ret);
+		if (!ret) {
+			_error = QObject::tr("Invalid latitude\nLine %1").arg(ln);
+			return false;
+		}
+		qreal lon = list[1].trimmed().toDouble(&ret);
+		if (!ret) {
+			_error = QObject::tr("Invalid longitude\nLine %1").arg(ln);
+			return false;
+		}
+		QByteArray ba = list[2].trimmed();
+
+		QPointF p;
+		Entry entry;
+		ll2mercator(QPointF(lon, lat), p);
+		entry.description = QString::fromUtf8(ba.data(), ba.size());
+		entry.coordinates = p;
+
+		_data.append(entry);
+		ln++;
+	}
+
+	for (int i = 0; i < _data.size(); ++i) {
+		qreal c[2];
+		c[0] = _data.at(i).coordinates.x();
+		c[1] = _data.at(i).coordinates.y();
+		_tree.Insert(c, c, &_data.at(i));
+	}
+
+	return true;
+}
+
+static bool cb(const Entry* data, void* context)
+{
+	QSet<const Entry*> *set = (QSet<const Entry*>*) context;
+	set->insert(data);
+
+	return true;
+}
+
+#define RECT 0.01
+QVector<Entry> POI::points(const QVector<QPointF> &path) const
+{
+	QVector<Entry> ret;
+	QSet<const Entry*> set;
+	qreal min[2], max[2];
+
+	for (int i = 0; i < path.count(); i++) {
+		min[0] = path.at(i).x() - RECT;
+		min[1] = path.at(i).y() - RECT;
+		max[0] = path.at(i).x() + RECT;
+		max[1] = path.at(i).y() + RECT;
+		_tree.Search(min, max, cb, &set);
+	}
+
+	QSet<const Entry *>::const_iterator i = set.constBegin();
+	while (i != set.constEnd()) {
+		ret.append(*(*i));
+    	++i;
+	}
+
+	return ret;
+}
+
+void POI::clear()
+{
+	_tree.RemoveAll();
+	_data.clear();
+}