diff --git a/examples/callout/callout.cpp b/examples/callout/callout.cpp new file mode 100644 index 0000000..c49a743 --- /dev/null +++ b/examples/callout/callout.cpp @@ -0,0 +1,102 @@ +#include "callout.h" +#include +#include +#include +#include + +Callout::Callout(QGraphicsItem * parent): + QGraphicsItem(parent) +{ +} + +QRectF Callout::boundingRect() const +{ + QPointF anchor = mapFromParent(m_anchor); + QRectF rect; + rect.setLeft(qMin(m_textRect.left(), anchor.x())); + rect.setRight(qMax(m_textRect.right(), anchor.x())); + rect.setTop(qMin(m_textRect.top(), anchor.y())); + rect.setBottom(qMax(m_textRect.bottom(), anchor.y())); + return rect; +} + +void Callout::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) +{ + Q_UNUSED(option) + Q_UNUSED(widget) + QPainterPath path; + path.addRoundedRect(m_textRect, 5, 5); + + QPointF anchor = mapFromParent(m_anchor); + if (!m_textRect.contains(anchor)) { + QPointF point1, point2; + + // establish the position of the anchor point in relation to m_textRect + bool above = anchor.y() <= m_textRect.top(); + bool aboveCenter = anchor.y() > m_textRect.top() && anchor.y() <= m_textRect.center().y(); + bool belowCenter = anchor.y() > m_textRect.center().y() && anchor.y() <= m_textRect.bottom(); + bool below = anchor.y() > m_textRect.bottom(); + + bool onLeft = anchor.x() <= m_textRect.left(); + bool leftOfCenter = anchor.x() > m_textRect.left() && anchor.x() <= m_textRect.center().x(); + bool rightOfCenter = anchor.x() > m_textRect.center().x() && anchor.x() <= m_textRect.right(); + bool onRight = anchor.x() > m_textRect.right(); + + // get the nearest m_textRect corner. + qreal x = (onRight + rightOfCenter) * m_textRect.width(); + qreal y = (below + belowCenter) * m_textRect.height(); + bool cornerCase = (above && onLeft) || (above && onRight) || (below && onLeft) || (below && onRight); + bool vertical = qAbs(anchor.x() - x) > qAbs(anchor.y() - y); + + qreal x1 = x + leftOfCenter * 10 - rightOfCenter * 20 + cornerCase * !vertical * (onLeft * 10 - onRight * 20); + qreal y1 = y + aboveCenter * 10 - belowCenter * 20 + cornerCase * vertical * (above * 10 - below * 20);; + point1.setX(x1); + point1.setY(y1); + + qreal x2 = x + leftOfCenter * 20 - rightOfCenter * 10 + cornerCase * !vertical * (onLeft * 20 - onRight * 10);; + qreal y2 = y + aboveCenter * 20 - belowCenter * 10 + cornerCase * vertical * (above * 20 - below * 10);; + point2.setX(x2); + point2.setY(y2); + + path.moveTo(point1); + path.lineTo(mapFromParent(m_anchor)); + path.lineTo(point2); + path = path.simplified(); + } + painter->setBrush(QColor(255, 255, 255)); + painter->drawPath(path); + painter->drawText(m_textRect.adjusted(2, 2, 0, 0), m_text); +} + +void Callout::mousePressEvent(QGraphicsSceneMouseEvent *event) +{ + if (m_textRect.contains(event->pos())) { + m_clickOffset = event->pos(); + event->setAccepted(true); + } else { + event->setAccepted(false); + } +} + +void Callout::mouseMoveEvent(QGraphicsSceneMouseEvent *event) +{ + if (m_textRect.contains(event->pos())){ + setPos(mapToParent(event->pos() - m_clickOffset)); + event->setAccepted(true); + } else { + event->setAccepted(false); + } +} + +void Callout::setText(const QString &text) +{ + m_text = text; + QFontMetrics metrics(m_font); + prepareGeometryChange(); + m_textRect = metrics.boundingRect(QRect(0, 0, 150, 150), Qt::AlignLeft, m_text).adjusted(0, 0, 4, 4); +} + +void Callout::setAnchor(QPointF point) +{ + m_anchor = point; +} diff --git a/examples/callout/callout.h b/examples/callout/callout.h new file mode 100644 index 0000000..90499f5 --- /dev/null +++ b/examples/callout/callout.h @@ -0,0 +1,32 @@ +#ifndef CALLOUT_H +#define CALLOUT_H + +#include +#include + +class QGraphicsSceneMouseEvent; + +class Callout : public QGraphicsItem +{ +public: + Callout(QGraphicsItem * parent = 0); + + void setText(const QString &text); + void setAnchor(QPointF point); + + QRectF boundingRect() const; + void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget); + +protected: + void mousePressEvent(QGraphicsSceneMouseEvent *event); + void mouseMoveEvent(QGraphicsSceneMouseEvent *event); + +private: + QString m_text; + QRectF m_textRect; + QPointF m_anchor; + QFont m_font; + QPointF m_clickOffset; +}; + +#endif // CALLOUT_H diff --git a/examples/callout/callout.pro b/examples/callout/callout.pro new file mode 100644 index 0000000..0df4a5b --- /dev/null +++ b/examples/callout/callout.pro @@ -0,0 +1,13 @@ +!include( ../examples.pri ) { + error( "Couldn't find the examples.pri file!" ) +} + +TARGET = callout +TEMPLATE = app + +SOURCES += main.cpp\ + widget.cpp \ + callout.cpp + +HEADERS += widget.h \ + callout.h diff --git a/examples/callout/main.cpp b/examples/callout/main.cpp new file mode 100644 index 0000000..7b1f424 --- /dev/null +++ b/examples/callout/main.cpp @@ -0,0 +1,11 @@ +#include +#include "widget.h" + +int main(int argc, char *argv[]) +{ + QApplication a(argc, argv); + Widget w; + w.show(); + + return a.exec(); +} diff --git a/examples/callout/widget.cpp b/examples/callout/widget.cpp new file mode 100644 index 0000000..5174834 --- /dev/null +++ b/examples/callout/widget.cpp @@ -0,0 +1,56 @@ +#include "widget.h" +#include +#include +#include +#include +#include +#include +#include +#include "callout.h" + +QTCOMMERCIALCHART_USE_NAMESPACE + +Widget::Widget(QWidget *parent) + : QWidget(parent), + m_scene(0), + m_chart(0), + m_view(0) +{ + // chart + m_chart = new QChart; + m_chart->setMinimumSize(640, 480); + QLineSeries *series = new QLineSeries; + series->setName("Click the line to create a movable callout"); + series->append(1, 3); + series->append(4, 5); + series->append(5, 4.5); + series->append(7, 1); + series->append(11, 2); + m_chart->addSeries(series); + m_chart->createDefaultAxes(); + + m_scene = new QGraphicsScene; + m_view = new QGraphicsView(m_scene); + m_view->setRenderHint(QPainter::Antialiasing); + m_scene->addItem(m_chart); + + QVBoxLayout *mainLayout = new QVBoxLayout; + mainLayout->addWidget(m_view); + setLayout(mainLayout); + + connect(series, SIGNAL(clicked(QPointF)), this, SLOT(addCallout(QPointF))); +} + +Widget::~Widget() +{ + +} + +void Widget::addCallout(QPointF point) +{ + Callout *label = new Callout(m_chart); + label->setText(QString("X: %1\nY: %2").arg(point.x()).arg(point.y())); + label->setAnchor(m_chart->mapFromParent(m_view->mapToScene(m_view->mapFromGlobal(QCursor::pos())))); + label->setPos(m_chart->mapFromParent(m_view->mapToScene(m_view->mapFromGlobal(QCursor::pos() + QPoint(10, -50))))); + label->setZValue(11); +} diff --git a/examples/callout/widget.h b/examples/callout/widget.h new file mode 100644 index 0000000..5cf0733 --- /dev/null +++ b/examples/callout/widget.h @@ -0,0 +1,29 @@ +#ifndef WIDGET_H +#define WIDGET_H + +#include +#include + +class QGraphicsScene; +class QGraphicsView; + +QTCOMMERCIALCHART_USE_NAMESPACE + +class Widget : public QWidget +{ + Q_OBJECT + +public: + Widget(QWidget *parent = 0); + ~Widget(); + +public slots: + void addCallout(QPointF point); + +private: + QGraphicsScene *m_scene; + QChart *m_chart; + QGraphicsView *m_view; +}; + +#endif // WIDGET_H diff --git a/examples/examples.pro b/examples/examples.pro index 4aaddc4..185b842 100644 --- a/examples/examples.pro +++ b/examples/examples.pro @@ -31,7 +31,8 @@ SUBDIRS += \ scrollchart \ temperaturerecords \ donutchart \ - multiaxis + multiaxis \ + callout !linux-arm*: { SUBDIRS += \