2015-10-05 01:43:48 +02:00
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#include <QGraphicsView>
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2015-10-13 23:49:15 +02:00
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#include <QGraphicsSceneMouseEvent>
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2015-10-05 01:43:48 +02:00
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#include <QEvent>
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2015-10-17 01:33:02 +02:00
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#include <QGraphicsSimpleTextItem>
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2016-02-11 20:58:52 +01:00
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#include "config.h"
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2016-02-12 10:09:17 +01:00
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#include "axisitem.h"
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2015-10-12 01:12:12 +02:00
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#include "slideritem.h"
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2015-10-17 01:33:02 +02:00
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#include "sliderinfoitem.h"
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2015-10-12 01:12:12 +02:00
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#include "infoitem.h"
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2016-02-11 20:58:52 +01:00
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#include "graphview.h"
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2015-10-05 01:43:48 +02:00
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2015-10-17 01:33:02 +02:00
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2015-10-05 01:43:48 +02:00
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#define MARGIN 10.0
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2015-10-13 23:49:15 +02:00
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void Scene::mousePressEvent(QGraphicsSceneMouseEvent *e)
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{
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if (e->button() == Qt::LeftButton)
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emit mouseClicked(e->scenePos());
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QGraphicsScene::mousePressEvent(e);
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}
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2016-02-11 20:58:52 +01:00
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GraphView::GraphView(QWidget *parent)
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2015-10-05 01:43:48 +02:00
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: QGraphicsView(parent)
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{
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2015-10-13 23:49:15 +02:00
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_scene = new Scene(this);
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2015-10-05 01:43:48 +02:00
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setScene(_scene);
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2016-03-30 01:48:48 +02:00
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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2015-10-05 01:43:48 +02:00
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_xAxis = new AxisItem(AxisItem::X);
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_yAxis = new AxisItem(AxisItem::Y);
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_slider = new SliderItem();
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2015-10-12 01:12:12 +02:00
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_slider->setZValue(2.0);
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2015-10-13 23:49:15 +02:00
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2015-10-05 01:43:48 +02:00
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connect(_slider, SIGNAL(positionChanged(const QPointF&)), this,
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SLOT(emitSliderPositionChanged(const QPointF&)));
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2015-10-13 23:49:15 +02:00
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connect(_scene, SIGNAL(mouseClicked(const QPointF&)), this,
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SLOT(newSliderPosition(const QPointF&)));
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2015-10-05 01:43:48 +02:00
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2015-10-12 01:12:12 +02:00
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_info = new InfoItem();
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2015-10-17 01:33:02 +02:00
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_sliderInfo = new SliderInfoItem(_slider);
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_sliderInfo->setZValue(2.0);
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2015-10-05 01:43:48 +02:00
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_xScale = 1;
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_yScale = 1;
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2015-10-17 01:33:02 +02:00
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_precision = 0;
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2016-03-27 13:23:00 +02:00
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_minYRange = 0.01;
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2015-10-05 01:43:48 +02:00
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}
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2016-02-11 20:58:52 +01:00
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GraphView::~GraphView()
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2015-10-05 01:43:48 +02:00
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{
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if (_xAxis->scene() != _scene)
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delete _xAxis;
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if (_yAxis->scene() != _scene)
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delete _yAxis;
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if (_slider->scene() != _scene)
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delete _slider;
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2015-10-12 01:12:12 +02:00
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if (_info->scene() != _scene)
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delete _info;
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2015-10-05 01:43:48 +02:00
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delete _scene;
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::updateBounds(const QPointF &point)
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2015-10-05 01:43:48 +02:00
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{
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2016-03-27 13:23:00 +02:00
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if (point.x() < _bounds.left())
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_bounds.setLeft(point.x());
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if (point.x() > _bounds.right())
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_bounds.setRight(point.x());
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if (point.y() > _bounds.bottom())
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_bounds.setBottom(point.y());
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if (point.y() < _bounds.top())
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_bounds.setTop(point.y());
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2015-10-05 01:43:48 +02:00
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::createXLabel()
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2015-10-12 01:12:12 +02:00
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{
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_xAxis->setLabel(QString("%1 [%2]").arg(_xLabel).arg(_xUnits));
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::createYLabel()
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2015-10-12 01:12:12 +02:00
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{
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_yAxis->setLabel(QString("%1 [%2]").arg(_yLabel).arg(_yUnits));
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::setXLabel(const QString &label)
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2015-10-12 01:12:12 +02:00
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{
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_xLabel = label;
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createXLabel();
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::setYLabel(const QString &label)
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2015-10-12 01:12:12 +02:00
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{
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_yLabel = label;
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createYLabel();
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::setXUnits(const QString &units)
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2015-10-12 01:12:12 +02:00
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{
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_xUnits = units;
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createXLabel();
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::setYUnits(const QString &units)
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2015-10-12 01:12:12 +02:00
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{
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_yUnits = units;
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createYLabel();
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::setXScale(qreal scale)
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2015-12-19 20:23:07 +01:00
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{
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_xScale = scale;
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::setYScale(qreal scale)
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2015-12-19 20:23:07 +01:00
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{
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_yScale = scale;
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::loadData(const QVector<QPointF> &data)
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2015-10-05 01:43:48 +02:00
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{
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QPainterPath path;
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QGraphicsPathItem *pi;
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if (data.size() < 2)
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return;
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2016-03-27 13:23:00 +02:00
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if (!_graphs.size())
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_bounds.moveTo(data.at(0));
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2015-10-05 01:43:48 +02:00
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updateBounds(data.at(0));
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path.moveTo(data.at(0).x(), -data.at(0).y());
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for (int i = 1; i < data.size(); i++) {
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2016-03-19 09:06:43 +01:00
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const QPointF &p = data.at(i);
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path.lineTo(p.x(), -p.y());
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updateBounds(p);
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2015-10-05 01:43:48 +02:00
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}
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pi = new QGraphicsPathItem(path);
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2016-03-03 19:45:04 +01:00
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QBrush brush(_palette.color(), Qt::SolidPattern);
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2015-10-22 10:27:27 +02:00
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QPen pen(brush, 0);
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pi->setPen(pen);
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2015-10-05 01:43:48 +02:00
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_scene->addItem(pi);
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_graphs.append(pi);
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2015-12-19 20:23:07 +01:00
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::redraw()
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2015-12-19 20:23:07 +01:00
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{
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if (!_graphs.isEmpty())
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2016-03-23 09:22:26 +01:00
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redraw(viewport()->size() - QSizeF(MARGIN, MARGIN));
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2015-10-05 01:43:48 +02:00
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}
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2016-03-23 09:22:26 +01:00
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void GraphView::redraw(const QSizeF &size)
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2015-10-05 01:43:48 +02:00
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{
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QRectF r;
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QSizeF mx, my;
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2016-03-27 13:23:00 +02:00
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RangeF rx, ry;
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2015-10-05 01:43:48 +02:00
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QTransform transform;
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2016-03-27 13:23:00 +02:00
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qreal xs, ys;
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2015-10-05 01:43:48 +02:00
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if (_xAxis->scene() == _scene)
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_scene->removeItem(_xAxis);
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if (_yAxis->scene() == _scene)
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_scene->removeItem(_yAxis);
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if (_slider->scene() == _scene)
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_scene->removeItem(_slider);
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2015-10-12 01:12:12 +02:00
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if (_info->scene() == _scene)
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_scene->removeItem(_info);
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2015-10-05 01:43:48 +02:00
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for (int i = 0; i < _graphs.size(); i++)
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_graphs.at(i)->resetTransform();
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2016-03-27 13:23:00 +02:00
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rx = RangeF(_bounds.left() * _xScale, _bounds.right() * _xScale);
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ry = RangeF(_bounds.top() * _yScale, _bounds.bottom() * _yScale);
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if (ry.size() < _minYRange)
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ry.resize(_minYRange);
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2016-03-17 00:50:20 +01:00
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_xAxis->setRange(rx);
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_yAxis->setRange(ry);
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2015-10-05 01:43:48 +02:00
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mx = _xAxis->margin();
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my = _yAxis->margin();
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2016-03-17 00:50:20 +01:00
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2015-10-05 01:43:48 +02:00
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r = _scene->itemsBoundingRect();
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2016-03-27 13:23:00 +02:00
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if (r.height() < _minYRange)
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r.adjust(0, -(_minYRange/2 - r.height()/2), 0,
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_minYRange/2 - r.height()/2);
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2016-03-17 00:50:20 +01:00
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2015-10-05 01:43:48 +02:00
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xs = (size.width() - (my.width() + mx.width())) / r.width();
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2015-10-12 01:12:12 +02:00
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ys = (size.height() - (mx.height() + my.height())
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- _info->boundingRect().height()) / r.height();
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2015-10-05 01:43:48 +02:00
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transform.scale(xs, ys);
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for (int i = 0; i < _graphs.size(); i++)
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_graphs.at(i)->setTransform(transform);
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r = _scene->itemsBoundingRect();
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2016-03-27 13:23:00 +02:00
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if (r.height() < _minYRange * ys)
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r.adjust(0, -(_minYRange/2 * ys - r.height()/2), 0,
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(_minYRange/2) * ys - r.height()/2);
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2016-03-17 00:50:20 +01:00
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2015-10-05 01:43:48 +02:00
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_xAxis->setSize(r.width());
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_yAxis->setSize(r.height());
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_xAxis->setPos(r.bottomLeft());
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_yAxis->setPos(r.bottomLeft());
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_scene->addItem(_xAxis);
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_scene->addItem(_yAxis);
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2016-03-23 09:22:26 +01:00
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2015-12-19 20:23:07 +01:00
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qreal sp = (_slider->pos().x() == _slider->area().left())
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? 0 : (_slider->pos().x() - _slider->area().left())
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/ _slider->area().width();
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2015-10-05 01:43:48 +02:00
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_slider->setArea(r);
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2015-12-19 20:23:07 +01:00
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_slider->setPos(QPointF(sp * r.width(), r.bottom()));
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2015-10-05 01:43:48 +02:00
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_scene->addItem(_slider);
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2016-03-30 01:48:48 +02:00
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_sliderInfo->setVisible(_graphs.size() == 1);
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2015-12-19 20:49:22 +01:00
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2015-10-12 01:12:12 +02:00
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r = _scene->itemsBoundingRect();
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_info->setPos(r.topLeft() + QPointF(r.width()/2
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- _info->boundingRect().width()/2, -_info->boundingRect().height()));
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_scene->addItem(_info);
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2015-10-05 01:43:48 +02:00
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_scene->setSceneRect(_scene->itemsBoundingRect());
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::resizeEvent(QResizeEvent *)
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2015-10-05 01:43:48 +02:00
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{
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if (!_graphs.empty())
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2015-12-19 20:23:07 +01:00
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redraw();
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2015-10-05 01:43:48 +02:00
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::plot(QPainter *painter, const QRectF &target)
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2015-10-05 01:43:48 +02:00
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{
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qreal ratio = target.width() / target.height();
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QSizeF orig = _scene->sceneRect().size();
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QSizeF canvas = QSizeF(orig.height() * ratio, orig.height());
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2016-03-23 09:22:26 +01:00
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redraw(canvas);
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2015-10-19 00:35:08 +02:00
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_slider->hide();
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_info->hide();
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2016-02-02 01:10:05 +01:00
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_scene->render(painter, target, QRectF());
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2015-10-19 00:35:08 +02:00
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_slider->show();
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_info->show();
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2016-03-23 09:22:26 +01:00
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redraw(orig);
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2015-10-05 01:43:48 +02:00
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}
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2016-02-11 20:58:52 +01:00
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void GraphView::clear()
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2015-10-05 01:43:48 +02:00
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{
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if (_xAxis->scene() == _scene)
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_scene->removeItem(_xAxis);
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if (_yAxis->scene() == _scene)
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_scene->removeItem(_yAxis);
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if (_slider->scene() == _scene)
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_scene->removeItem(_slider);
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2015-10-12 01:12:12 +02:00
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if (_info->scene() == _scene)
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_scene->removeItem(_info);
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2015-10-17 01:33:02 +02:00
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2015-12-19 20:23:07 +01:00
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_slider->clear();
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2015-10-13 00:27:49 +02:00
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_info->clear();
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2015-10-05 01:43:48 +02:00
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_scene->clear();
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_graphs.clear();
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2016-03-02 09:34:39 +01:00
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_palette.reset();
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2015-10-05 01:43:48 +02:00
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2016-03-27 13:23:00 +02:00
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_bounds = QRectF();
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2015-10-05 01:43:48 +02:00
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_scene->setSceneRect(0, 0, 0, 0);
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}
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2016-03-22 19:19:59 +01:00
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static qreal yAtX(const QPainterPath &path, qreal x)
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{
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int low = 0;
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int high = path.elementCount() - 1;
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int mid = 0;
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while (low <= high) {
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mid = low + ((high - low) / 2);
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const QPainterPath::Element &e = path.elementAt(mid);
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if (e.x > x)
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high = mid - 1;
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else if (e.x < x)
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low = mid + 1;
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else
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return e.y;
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}
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QLineF l;
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if (path.elementAt(mid).x < x) {
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Q_ASSERT(mid >= 0 && mid+1 < path.elementCount());
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l = QLineF(path.elementAt(mid).x, path.elementAt(mid).y,
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path.elementAt(mid+1).x, path.elementAt(mid+1).y);
|
|
|
|
} else {
|
|
|
|
Q_ASSERT(mid-1 >= 0 && mid < path.elementCount());
|
|
|
|
l = QLineF(path.elementAt(mid-1).x, path.elementAt(mid-1).y,
|
|
|
|
path.elementAt(mid).x, path.elementAt(mid).y);
|
|
|
|
}
|
|
|
|
|
|
|
|
return l.pointAt((x - l.p1().x()) / (l.p2().x() - l.p1().x())).y();
|
|
|
|
}
|
|
|
|
|
2016-02-11 20:58:52 +01:00
|
|
|
void GraphView::emitSliderPositionChanged(const QPointF &pos)
|
2015-10-05 01:43:48 +02:00
|
|
|
{
|
2015-10-17 12:08:30 +02:00
|
|
|
if (_graphs.isEmpty())
|
|
|
|
return;
|
|
|
|
|
2015-10-05 01:43:48 +02:00
|
|
|
qreal val = pos.x() / _slider->area().width();
|
2016-03-27 13:23:00 +02:00
|
|
|
emit sliderPositionChanged(val * _bounds.width());
|
2015-10-17 01:33:02 +02:00
|
|
|
|
2016-03-30 01:48:48 +02:00
|
|
|
if (_graphs.size() > 1)
|
2016-03-22 19:19:59 +01:00
|
|
|
return;
|
|
|
|
|
2015-10-17 01:33:02 +02:00
|
|
|
const QPainterPath &path = _graphs.at(0)->path();
|
2016-03-17 00:50:20 +01:00
|
|
|
QRectF br = path.boundingRect();
|
2016-03-27 13:23:00 +02:00
|
|
|
if (br.height() < _minYRange)
|
|
|
|
br.adjust(0, -(_minYRange/2 - br.height()/2), 0,
|
|
|
|
_minYRange/2 - br.height()/2);
|
2016-03-22 19:19:59 +01:00
|
|
|
|
2016-03-27 13:23:00 +02:00
|
|
|
qreal y = yAtX(path, val * _bounds.width());
|
2016-03-22 19:19:59 +01:00
|
|
|
qreal r = (y - br.bottom()) / br.height();
|
2016-03-30 01:48:48 +02:00
|
|
|
|
|
|
|
SliderInfoItem::Side s = (pos.x() + _sliderInfo->boundingRect().width()
|
|
|
|
> _slider->area().right()) ? SliderInfoItem::Left : SliderInfoItem::Right;
|
|
|
|
|
|
|
|
_sliderInfo->setSide(s);
|
2015-10-17 01:33:02 +02:00
|
|
|
_sliderInfo->setPos(QPointF(0, _slider->boundingRect().height() * r));
|
2016-03-22 19:19:59 +01:00
|
|
|
_sliderInfo->setText(QString::number(-y * _yScale, 'f', _precision));
|
2015-10-05 01:43:48 +02:00
|
|
|
}
|
|
|
|
|
2016-02-11 20:58:52 +01:00
|
|
|
qreal GraphView::sliderPosition() const
|
2015-10-05 01:43:48 +02:00
|
|
|
{
|
2016-03-21 22:37:55 +01:00
|
|
|
if (!_slider->isVisible())
|
|
|
|
return -1;
|
|
|
|
else
|
2016-03-27 13:23:00 +02:00
|
|
|
return (_slider->pos().x() / _slider->area().width()) * _bounds.width();
|
2015-10-05 01:43:48 +02:00
|
|
|
}
|
|
|
|
|
2016-02-11 20:58:52 +01:00
|
|
|
void GraphView::setSliderPosition(qreal pos)
|
2015-10-05 01:43:48 +02:00
|
|
|
{
|
2016-03-23 09:22:26 +01:00
|
|
|
if (_graphs.isEmpty())
|
|
|
|
return;
|
|
|
|
|
2016-03-27 13:23:00 +02:00
|
|
|
if (pos > _bounds.right() || pos < _bounds.left())
|
2016-03-21 22:37:55 +01:00
|
|
|
_slider->setVisible(false);
|
|
|
|
else {
|
2016-03-27 13:23:00 +02:00
|
|
|
_slider->setPos((pos / _bounds.width()) * _slider->area().width(), 0);
|
2016-03-21 22:37:55 +01:00
|
|
|
_slider->setVisible(true);
|
|
|
|
}
|
2015-10-05 01:43:48 +02:00
|
|
|
}
|
2015-10-12 01:12:12 +02:00
|
|
|
|
2016-02-11 20:58:52 +01:00
|
|
|
void GraphView::newSliderPosition(const QPointF &pos)
|
2015-10-13 23:49:15 +02:00
|
|
|
{
|
|
|
|
if (_slider->area().contains(pos)) {
|
|
|
|
_slider->setPos(pos);
|
2016-03-21 22:37:55 +01:00
|
|
|
_slider->setVisible(true);
|
2015-10-13 23:49:15 +02:00
|
|
|
emitSliderPositionChanged(pos);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-02-11 20:58:52 +01:00
|
|
|
void GraphView::addInfo(const QString &key, const QString &value)
|
2015-10-12 01:12:12 +02:00
|
|
|
{
|
|
|
|
_info->insert(key, value);
|
|
|
|
}
|
2015-12-19 20:23:07 +01:00
|
|
|
|
2016-02-11 20:58:52 +01:00
|
|
|
void GraphView::clearInfo()
|
2015-12-19 20:23:07 +01:00
|
|
|
{
|
|
|
|
_info->clear();
|
|
|
|
}
|