Added slider info

gpxsee.pro

@@ -21,7 +21,8 @@ HEADERS += src/config.h \
     src/markeritem.h \
     src/infoitem.h \
     src/elevationgraph.h \
-    src/speedgraph.h
+    src/speedgraph.h \
+    src/sliderinfoitem.h
 SOURCES += src/main.cpp \
     src/gui.cpp \
     src/gpx.cpp \
@@ -37,7 +38,8 @@ SOURCES += src/main.cpp \
     src/markeritem.cpp \
     src/infoitem.cpp \
     src/elevationgraph.cpp \
-    src/speedgraph.cpp
+    src/speedgraph.cpp \
+    src/sliderinfoitem.cpp
 RESOURCES += gpxsee.qrc
 TRANSLATIONS = lang/gpxsee_cs.ts
 macx:ICON = icons/gpxsee.icns

src/axisitem.cpp

@@ -1,5 +1,6 @@
 #include <cmath>
 #include <QPainter>
+#include "config.h"
 #include "axisitem.h"
 
 #include <QDebug>
@@ -8,8 +9,6 @@
 #define PADDING     6
 #define XTICKS      15
 #define YTICKS      10
-#define FONT_FAMILY "Arial"
-#define FONT_SIZE   12
 
 
 struct Label {
@@ -64,7 +63,7 @@ static struct Label label(double min, double max, int ticks)
 }
 
 
-AxisItem::AxisItem(Type type)
+AxisItem::AxisItem(Type type, QGraphicsItem *parent) : QGraphicsItem(parent)
 {
 	_type = type;
 	_size = 0;

src/axisitem.h

@@ -8,7 +8,7 @@ class AxisItem : public QGraphicsItem
 public:
 	enum Type {X, Y};
 
-	AxisItem(Type type);
+	AxisItem(Type type, QGraphicsItem *parent = 0);
 
 	QRectF boundingRect() const {return _boundingRect;}
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,

src/config.h

@@ -5,4 +5,7 @@
 #define APP_HOMEPAGE            "http://tumic.wz.cz/gpxsee"
 #define APP_VERSION             "0.1"
 
+#define FONT_FAMILY             "Arial"
+#define FONT_SIZE               12
+
 #endif /* CONFIG_H */

src/elevationgraph.cpp

@@ -1,7 +1,7 @@
 #include <float.h>
 #include "elevationgraph.h"
 
-ElevationGraph::ElevationGraph()
+ElevationGraph::ElevationGraph(QWidget *parent) : Graph(parent)
 {
 	_ascent = 0;
 	_descent = 0;

src/elevationgraph.h

@@ -8,7 +8,7 @@ class ElevationGraph : public Graph
 	Q_OBJECT
 
 public:
-	ElevationGraph();
+	ElevationGraph(QWidget *parent = 0);
 
 	void loadData(const QVector<QPointF> &data);
 	void clear();

src/graph.cpp

@@ -2,12 +2,16 @@
 #include <QGraphicsView>
 #include <QGraphicsSceneMouseEvent>
 #include <QEvent>
+#include <QGraphicsSimpleTextItem>
 #include "slideritem.h"
+#include "sliderinfoitem.h"
 #include "infoitem.h"
+#include "config.h"
 #include "graph.h"
 
 #include <QDebug>
 
+
 #define MARGIN 10.0
 
 
@@ -39,6 +43,9 @@ Graph::Graph(QWidget *parent)
 
 	_info = new InfoItem();
 
+	_sliderInfo = new SliderInfoItem(_slider);
+	_sliderInfo->setZValue(2.0);
+
 	_xMax = -FLT_MAX;
 	_xMin = FLT_MAX;
 	_yMax = -FLT_MAX;
@@ -46,6 +53,8 @@ Graph::Graph(QWidget *parent)
 
 	_xScale = 1;
 	_yScale = 1;
+
+	_precision = 0;
 }
 
 Graph::~Graph()
@@ -135,6 +144,9 @@ void Graph::loadData(const QVector<QPointF> &data)
 	_scene->addItem(pi);
 	_graphs.append(pi);
 
+	if (_graphs.size() > 1)
+		_sliderInfo->hide();
+
 	resize(viewport()->size() - QSizeF(MARGIN, MARGIN));
 }
 
@@ -223,6 +235,8 @@ void Graph::clear()
 	if (_info->scene() == _scene)
 		_scene->removeItem(_info);
 
+	_sliderInfo->show();
+
 	_info->clear();
 	_scene->clear();
 	_graphs.clear();
@@ -240,6 +254,13 @@ void Graph::emitSliderPositionChanged(const QPointF &pos)
 {
 	qreal val = pos.x() / _slider->area().width();
 	emit sliderPositionChanged(val);
+
+	const QPainterPath &path = _graphs.at(0)->path();
+	QPointF p = path.pointAtPercent(val);
+	qreal r = (p.y() - path.boundingRect().bottom())
+	  / path.boundingRect().height();
+	_sliderInfo->setPos(QPointF(0, _slider->boundingRect().height() * r));
+	_sliderInfo->setText(QString::number(-p.y() * _yScale, 'f', _precision));
 }
 
 qreal Graph::sliderPosition() const

src/graph.h

@@ -11,6 +11,7 @@
 
 
 class SliderItem;
+class SliderInfoItem;
 class InfoItem;
 
 class Scene : public QGraphicsScene
@@ -40,6 +41,7 @@ public:
 	void setYUnits(const QString &units);
 	void setXScale(qreal scale) {_xScale = scale;}
 	void setYScale(qreal scale) {_yScale = scale;}
+	void setPrecision(int p) {_precision = p;}
 
 	void plot(QPainter *painter, const QRectF &target);
 	void clear();
@@ -58,6 +60,7 @@ protected:
 	qreal _xScale, _yScale;
 	QString _xUnits, _yUnits;
 	QString _xLabel, _yLabel;
+	int _precision;
 
 private slots:
 	void emitSliderPositionChanged(const QPointF &pos);
@@ -70,13 +73,14 @@ private:
 	void resize(const QSizeF &size);
 
 	Scene *_scene;
+
 	AxisItem *_xAxis, *_yAxis;
 	SliderItem *_slider;
+	SliderInfoItem *_sliderInfo;
 	InfoItem *_info;
+
 	QList<QGraphicsPathItem*> _graphs;
-
 	qreal _xMin, _xMax, _yMin, _yMax;
-
 	ColorShop _colorShop;
 };
 

src/infoitem.cpp

@@ -1,12 +1,12 @@
 #include <QFont>
 #include <QPainter>
+#include "config.h"
 #include "infoitem.h"
 
-#define FONT_FAMILY "Arial"
+
-#define FONT_SIZE   12
 #define PADDING     10
 
-InfoItem::InfoItem()
+InfoItem::InfoItem(QGraphicsItem *parent) : QGraphicsItem(parent)
 {
 
 }
@@ -73,4 +73,6 @@ void InfoItem::insert(const QString &key, const QString &value)
 		_list.append(kv);
 	else
 		_list[i] = kv;
+
+	prepareGeometryChange();
 }

src/infoitem.h

@@ -7,7 +7,7 @@
 class InfoItem : public QGraphicsItem
 {
 public:
-	InfoItem();
+	InfoItem(QGraphicsItem *parent = 0);
 
 	QRectF boundingRect() const;
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,

src/markeritem.cpp

@@ -3,7 +3,7 @@
 
 #define SIZE 8
 
-MarkerItem::MarkerItem()
+MarkerItem::MarkerItem(QGraphicsItem *parent) : QGraphicsItem(parent)
 {
 
 }

src/markeritem.h

@@ -6,7 +6,7 @@
 class MarkerItem : public QGraphicsItem
 {
 public:
-	MarkerItem();
+	MarkerItem(QGraphicsItem *parent = 0);
 
 	QRectF boundingRect() const;
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,

src/poiitem.cpp

@@ -1,14 +1,14 @@
 #include <QPainter>
+#include "config.h"
 #include "poiitem.h"
 
 #include <QDebug>
 
-#define FONT_FAMILY "Arial"
-#define FONT_SIZE   12
 #define POINT_SIZE  8
 
 
-POIItem::POIItem(const QString &text)
+POIItem::POIItem(const QString &text, QGraphicsItem *parent)
+  : QGraphicsItem(parent)
 {
 	_text = text;
 	updateBoundingRect();

src/poiitem.h

@@ -6,7 +6,7 @@
 class POIItem : public QGraphicsItem
 {
 public:
-	POIItem(const QString &text);
+	POIItem(const QString &text, QGraphicsItem *parent = 0);
 
 	QRectF boundingRect() const {return _boundingRect;}
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,

src/sliderinfoitem.cpp

@@ -0,0 +1,46 @@
+#include <QPainter>
+#include "config.h"
+#include "sliderinfoitem.h"
+
+
+#define SIZE 5
+
+SliderInfoItem::SliderInfoItem(QGraphicsItem *parent) : QGraphicsItem(parent)
+{
+
+}
+
+void SliderInfoItem::updateBoundingRect()
+{
+	QFont font;
+	font.setPixelSize(FONT_SIZE);
+	font.setFamily(FONT_FAMILY);
+	QFontMetrics fm(font);
+
+	_boundingRect = QRectF(-SIZE/2, -SIZE/2, fm.width(_text) + SIZE, fm.height());
+}
+
+void SliderInfoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem
+  *option, QWidget *widget)
+{
+	Q_UNUSED(option);
+	Q_UNUSED(widget);
+	QFont font;
+	font.setPixelSize(FONT_SIZE);
+	font.setFamily(FONT_FAMILY);
+	QFontMetrics fm(font);
+	painter->setFont(font);
+
+	painter->setPen(Qt::red);
+	painter->drawText(SIZE, fm.height() - fm.descent(), _text);
+	painter->fillRect(QRect(-SIZE/2, -SIZE/2, SIZE, SIZE), Qt::red);
+
+//	painter->drawRect(boundingRect());
+}
+
+void SliderInfoItem::setText(const QString &text)
+{
+	_text = text;
+	updateBoundingRect();
+	prepareGeometryChange();
+}

src/sliderinfoitem.h

@@ -0,0 +1,24 @@
+#ifndef SLIDERINFOITEM_H
+#define SLIDERINFOITEM_H
+
+#include <QGraphicsItem>
+
+class SliderInfoItem : public QGraphicsItem
+{
+public:
+	SliderInfoItem(QGraphicsItem *parent = 0);
+
+	QRectF boundingRect() const {return _boundingRect;}
+	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+	  QWidget *widget);
+
+	void setText(const QString &text);
+
+private:
+	void updateBoundingRect();
+
+	QString _text;
+	QRectF _boundingRect;
+};
+
+#endif // SLIDERINFOITEM_H

src/slideritem.cpp

@@ -3,9 +3,9 @@
 
 #include <QDebug>
 
-#define SIZE 10
+#define SIZE        10
 
-SliderItem::SliderItem()
+SliderItem::SliderItem(QGraphicsObject *parent) : QGraphicsObject(parent)
 {
 	setFlag(ItemIsMovable);
 	setFlag(ItemSendsGeometryChanges);

src/slideritem.h

@@ -8,7 +8,7 @@ class SliderItem : public QGraphicsObject
 	Q_OBJECT
 
 public:
-	SliderItem();
+	SliderItem(QGraphicsObject *parent = 0);
 
 	QRectF boundingRect() const;
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,

src/speedgraph.cpp

@@ -2,7 +2,7 @@
 
 #include <QDebug>
 
-SpeedGraph::SpeedGraph()
+SpeedGraph::SpeedGraph(QWidget *parent) : Graph(parent)
 {
 	_max = 0;
 
@@ -12,6 +12,7 @@ SpeedGraph::SpeedGraph()
 	Graph::setYUnits(tr("km/h"));
 	Graph::setXScale(0.001);
 	Graph::setYScale(3.6);
+	Graph::setPrecision(1);
 }
 
 void SpeedGraph::loadData(const QVector<QPointF> &data, qreal time)

src/speedgraph.h

@@ -9,7 +9,7 @@ class SpeedGraph : public Graph
 	Q_OBJECT
 
 public:
-	SpeedGraph();
+	SpeedGraph(QWidget *parent = 0);
 
 	void loadData(const QVector<QPointF> &data, qreal time);
 	void clear();