Code cleanup

src/axisitem.cpp

@@ -147,7 +147,7 @@ void AxisItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
 */
 }
 
-QSizeF AxisItem::margin()
+QSizeF AxisItem::margin() const
 {
 	QFont font;
 	font.setPixelSize(FONT_SIZE);

src/axisitem.h

@@ -18,7 +18,7 @@ public:
 	void setSize(qreal size);
 	void setLabel(const QString& label);
 
-	QSizeF margin();
+	QSizeF margin() const;
 
 private:
 	void updateBoundingRect();

src/filebrowser.cpp

@@ -41,12 +41,12 @@ void FileBrowser::setFilter(const QStringList &filter)
 		reloadDirectory(_files.last().canonicalPath());
 }
 
-bool FileBrowser::isLast()
+bool FileBrowser::isLast() const
 {
 	return (_files.size() > 0 && _index == _files.size() - 1);
 }
 
-bool FileBrowser::isFirst()
+bool FileBrowser::isFirst() const
 {
 	return (_files.size() > 0 && _index == 0);
 }

src/filebrowser.h

@@ -23,8 +23,8 @@ public:
 	QString last();
 	QString first();
 
-	bool isLast();
-	bool isFirst();
+	bool isLast() const;
+	bool isFirst() const;
 
 private slots:
 	void reloadDirectory(const QString &path);

src/map.h

@@ -9,7 +9,7 @@ public:
 	Tile(const QPoint &xy, int zoom)
 		{_xy = xy; _zoom = zoom;}
 
-	int zoom() {return _zoom;}
+	int zoom() const {return _zoom;}
 	QPoint& xy() {return _xy;}
 	QPixmap& pixmap() {return _pixmap;}
 

src/poi.h

@@ -14,7 +14,7 @@ class POI
 public:
 	POI() : _errorLine(0) {}
 	bool loadFile(const QString &fileName);
-	QString errorString() const {return _error;}
+	const QString &errorString() const {return _error;}
 	int errorLine() const {return _errorLine;}
 
 	QVector<Waypoint> points(const QVector<QPointF> &path,

src/slideritem.h

@@ -14,7 +14,7 @@ public:
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
 	  QWidget *widget);
 
-	QRectF area() {return _area;}
+	const QRectF &area() const {return _area;}
 	void setArea(const QRectF &area) {_area = area;}
 
 	void clear();

src/track.cpp

@@ -1,3 +1,4 @@
+#include <cmath>
 #include "ll.h"
 #include "track.h"