mirror of
https://github.com/tumic0/GPXSee.git
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103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
#include <QEvent>
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#include <QResizeEvent>
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#include <QPainter>
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#include "mapview.h"
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#include "navigationwidget.h"
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#define MARGIN 5
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#define SIZE 40
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#ifdef Q_OS_ANDROID
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NavigationWidget::NavigationWidget(MapView *view)
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: QWidget(view), _showPrev(false), _showNext(false)
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{
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setAttribute(Qt::WA_NoSystemBackground);
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setAttribute(Qt::WA_TranslucentBackground);
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setAttribute(Qt::WA_TransparentForMouseEvents);
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newParent();
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connect(view, &MapView::clicked, this, &NavigationWidget::viewClicked);
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}
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bool NavigationWidget::eventFilter(QObject *obj, QEvent *ev)
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{
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if (obj == parent()) {
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if (ev->type() == QEvent::Resize)
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resize(static_cast<QResizeEvent*>(ev)->size());
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else if (ev->type() == QEvent::ChildAdded)
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raise();
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}
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return QWidget::eventFilter(obj, ev);
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}
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bool NavigationWidget::event(QEvent* ev)
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{
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if (ev->type() == QEvent::ParentAboutToChange) {
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if (parent())
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parent()->removeEventFilter(this);
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} else if (ev->type() == QEvent::ParentChange)
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newParent();
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return QWidget::event(ev);
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}
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void NavigationWidget::paintEvent(QPaintEvent *ev)
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{
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Q_UNUSED(ev);
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QPainter p(this);
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QColor c(Qt::black);
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c.setAlpha(64);
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p.setBrush(c);
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p.setPen(Qt::NoPen);
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if (_showPrev) {
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QPainterPath path;
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path.addEllipse(QRect(MARGIN, rect().center().y() - SIZE/2, SIZE, SIZE));
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path.moveTo(QPointF(MARGIN + 0.66*SIZE, rect().center().y() - SIZE/4));
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path.lineTo(QPointF(MARGIN + SIZE/4, rect().center().y()));
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path.lineTo(QPointF(MARGIN + 0.66*SIZE, rect().center().y() + SIZE/4));
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path.closeSubpath();
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p.drawPath(path);
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}
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if (_showNext) {
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QPainterPath path;
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path.addEllipse(QRect(rect().right() - (MARGIN + SIZE),
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rect().center().y() - SIZE/2, SIZE, SIZE));
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path.moveTo(QPointF(rect().right() - (MARGIN + 0.66*SIZE),
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rect().center().y() - SIZE/4));
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path.lineTo(QPointF(rect().right() - (MARGIN + SIZE/4),
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rect().center().y()));
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path.lineTo(QPointF(rect().right() - (MARGIN + 0.66*SIZE),
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rect().center().y() + SIZE/4));
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path.closeSubpath();
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p.drawPath(path);
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}
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}
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void NavigationWidget::newParent()
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{
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if (!parent())
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return;
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parent()->installEventFilter(this);
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raise();
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}
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void NavigationWidget::viewClicked(const QPoint &pos)
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{
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QRect prevRect(MARGIN, rect().center().y() - SIZE/2, SIZE, SIZE);
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QRect nextRect(rect().right() - (MARGIN + SIZE), rect().center().y()
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- SIZE/2, SIZE, SIZE);
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if (prevRect.contains(pos))
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emit prev();
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else if (nextRect.contains(pos))
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emit next();
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}
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#endif // Q_OS_ANDROID
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