Properly handling non-integer tile matrix ids

src/map/tile.h

@@ -8,15 +8,15 @@
 class Tile
 {
 public:
-	Tile(const QPoint &xy, int zoom)
+	Tile(const QPoint &xy, const QVariant &zoom)
 		{_xy = xy; _zoom = zoom;}
 
-	int zoom() const {return _zoom;}
+	QVariant zoom() const {return _zoom;}
 	const QPoint& xy() const {return _xy;}
 	QPixmap& pixmap() {return _pixmap;}
 
 private:
-	int _zoom;
+	QVariant _zoom;
 	QPoint _xy;
 	QPixmap _pixmap;
 };

src/map/tileloader.cpp

@@ -90,7 +90,7 @@ QString TileLoader::tileUrl(const Tile &tile) const
 {
 	QString url(_url);
 
-	url.replace("$z", QString::number(tile.zoom()));
+	url.replace("$z", tile.zoom().toString());
 	url.replace("$x", QString::number(tile.xy().x()));
 	url.replace("$y", QString::number(tile.xy().y()));
 
@@ -99,7 +99,7 @@ QString TileLoader::tileUrl(const Tile &tile) const
 
 QString TileLoader::tileFile(const Tile &tile) const
 {
-	QString file = _dir + QString("/%1-%2-%3").arg(tile.zoom())
+	QString file = _dir + QString("/%1-%2-%3").arg(tile.zoom().toString())
 	  .arg(tile.xy().x()).arg(tile.xy().y());
 
 	return file;

src/map/wmts.cpp

@@ -4,6 +4,7 @@
 #include <QEventLoop>
 #include <QTextStream>
 #include <QStringList>
+#include <QtAlgorithms>
 #include "downloader.h"
 #include "pcs.h"
 #include "wmts.h"
@@ -52,12 +53,11 @@ bool WMTS::createProjection(const QString &crs)
 
 void WMTS::tileMatrix(QXmlStreamReader &reader)
 {
-	int id;
 	Zoom zoom;
 
 	while (reader.readNextStartElement()) {
 		if (reader.name() == "Identifier")
-			id = reader.readElementText().toInt();
+			zoom.id = reader.readElementText();
 		else if (reader.name() == "ScaleDenominator")
 			zoom.scaleDenominator = reader.readElementText().toDouble();
 		else if (reader.name() == "TopLeftCorner") {
@@ -75,7 +75,8 @@ void WMTS::tileMatrix(QXmlStreamReader &reader)
 			reader.skipCurrentElement();
 	}
 
-	Zoom &z = _zooms[id];
+	Zoom &z = _zooms[zoom.id];
+	z.id = zoom.id;
 	z.matrix = zoom.matrix;
 	z.scaleDenominator = zoom.scaleDenominator;
 	z.tile = zoom.tile;
@@ -101,12 +102,12 @@ void WMTS::tileMatrixSet(QXmlStreamReader &reader, const QString &set)
 
 void WMTS::tileMatrixLimits(QXmlStreamReader &reader)
 {
-	int id;
+	QString id;
 	QRect limits;
 
 	while (reader.readNextStartElement()) {
 		if (reader.name() == "TileMatrix")
-			id = reader.readElementText().toInt();
+			id = reader.readElementText();
 		else if (reader.name() == "MinTileRow")
 			limits.setTop(reader.readElementText().toInt());
 		else if (reader.name() == "MaxTileRow")
@@ -253,6 +254,13 @@ bool WMTS::load(const QString &file, const QString &url, const QString &layer,
 	return true;
 }
 
+QList<WMTS::Zoom> WMTS::zooms() const
+{
+	QList<Zoom> z(_zooms.values());
+	qSort(z);
+	return z;
+}
+
 #ifndef QT_NO_DEBUG
 QDebug operator<<(QDebug dbg, const WMTS::Zoom &zoom)
 {

src/map/wmts.h

@@ -3,6 +3,7 @@
 
 #include <QSize>
 #include <QMap>
+#include <QList>
 #include "projection.h"
 
 class QXmlStreamReader;
@@ -12,18 +13,22 @@ class WMTS
 {
 public:
 	struct Zoom {
+		QString id;
 		qreal scaleDenominator;
 		QPointF topLeft;
 		QSize tile;
 		QSize matrix;
 		QRect limits;
+
+		bool operator<(const Zoom &other) const
+			{return this->scaleDenominator > other.scaleDenominator;}
 	};
 
 	bool load(const QString &path, const QString &url, const QString &layer,
 	  const QString &set);
 	const QString &errorString() const {return _errorString;}
 
-	const QList<Zoom> zooms() const {return _zooms.values();}
+	QList<Zoom> zooms() const;
 	const Projection &projection() const {return _projection;}
 
 	static Downloader *downloader() {return _downloader;}
@@ -48,7 +53,7 @@ private:
 	  const QString &set);
 	bool getCapabilities(const QString &url, const QString &file);
 
-	QMap<int, Zoom> _zooms;
+	QMap<QString, Zoom> _zooms;
 	Projection _projection;
 
 	QString _errorString;

src/map/wmtsmap.cpp

@@ -108,6 +108,11 @@ void WMTSMap::emitLoaded()
 QRectF WMTSMap::bounds() const
 {
 	const WMTS::Zoom &z = _zooms.at(_zoom);
+
+	if (z.limits.isNull())
+		return QRectF(QPointF(0, 0), QSize(z.tile.width() * z.matrix.width(),
+		  z.tile.height() * z.matrix.height()));
+	else
 		return QRectF(QPointF(z.limits.left() * z.tile.width(), z.limits.top()
 		  * z.tile.height()), QSize(z.tile.width() * z.limits.width(),
 		  z.tile.height() * z.limits.height()));
@@ -184,7 +189,7 @@ void WMTSMap::draw(QPainter *painter, const QRectF &rect)
 	QList<Tile> tiles;
 	for (int i = tl.x(); i < br.x(); i++)
 		for (int j = tl.y(); j < br.y(); j++)
-			tiles.append(Tile(QPoint(i, j), _zoom));
+			tiles.append(Tile(QPoint(i, j), z.id));
 
 	if (_block)
 		_tileLoader.loadTilesSync(tiles);