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Improved slider handling

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This commit is contained in:
Martin Tůma 2015-10-13 23:49:15 +02:00
parent 2df5dd0d88
commit 7e2b27acf1
2 changed files with 38 additions and 4 deletions
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25
src/graph.cpp
View File

@ -1,6 +1,6 @@
#include <float.h>
#include <QGraphicsView>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QEvent>
#include "slideritem.h"
#include "infoitem.h"
@ -10,10 +10,20 @@
#define MARGIN 10.0
void Scene::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
if (e->button() == Qt::LeftButton)
emit mouseClicked(e->scenePos());
QGraphicsScene::mousePressEvent(e);
}
Graph::Graph(QWidget *parent)
: QGraphicsView(parent)
{
_scene = new QGraphicsScene(this);
_scene = new Scene(this);
setScene(_scene);
_xAxis = new AxisItem(AxisItem::X);
@ -21,8 +31,11 @@ Graph::Graph(QWidget *parent)
_slider = new SliderItem();
_slider->setZValue(2.0);
connect(_slider, SIGNAL(positionChanged(const QPointF&)), this,
SLOT(emitSliderPositionChanged(const QPointF&)));
connect(_scene, SIGNAL(mouseClicked(const QPointF&)), this,
SLOT(newSliderPosition(const QPointF&)));
_info = new InfoItem();
@ -239,6 +252,14 @@ void Graph::setSliderPosition(qreal pos)
_slider->setPos(pos * _slider->area().width(), 0);
}
void Graph::newSliderPosition(const QPointF &pos)
{
if (_slider->area().contains(pos)) {
_slider->setPos(pos);
emitSliderPositionChanged(pos);
}
}
void Graph::addInfo(const QString &key, const QString &value)
{
_info->insert(key, value);

17
src/graph.h
View File

@ -2,6 +2,7 @@
#define GRAPH_H
#include <QGraphicsView>
#include <QGraphicsScene>
#include <QVector>
#include <QList>
#include <QPointF>
@ -12,6 +13,18 @@
class SliderItem;
class InfoItem;
class Scene : public QGraphicsScene
{
Q_OBJECT
public:
Scene(QObject *parent = 0) : QGraphicsScene(parent) {}
void mousePressEvent(QGraphicsSceneMouseEvent *e);
signals:
void mouseClicked(const QPointF &pos);
};
class Graph : public QGraphicsView
{
Q_OBJECT
@ -48,6 +61,7 @@ protected:
private slots:
void emitSliderPositionChanged(const QPointF &pos);
void newSliderPosition(const QPointF &pos);
private:
void createXLabel();
@ -55,8 +69,7 @@ private:
void updateBounds(const QPointF &point);
void resize(const QSizeF &size);
QGraphicsScene *_scene;
Scene *_scene;
AxisItem *_xAxis, *_yAxis;
SliderItem *_slider;
InfoItem *_info;