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Added zooming on double clicks

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Fixed "zoom under mouse" algorithm
This commit is contained in:
Martin Tůma 2016-10-29 21:22:26 +02:00
parent 0d1b416c4f
commit eb03fe6ead
2 changed files with 29 additions and 18 deletions
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40
src/pathview.cpp
View File

@ -447,11 +447,14 @@ void PathView::rescale()
_mapScale->setZoom(_zoom);
}
void PathView::zoom(int z, const QPointF &pos)
void PathView::zoom(int z, const QPoint &pos)
{
if (_tracks.isEmpty() && _routes.isEmpty() && _waypoints.isEmpty())
return;
QPoint offset = pos - viewport()->rect().center();
QPointF spos = mapToScene(pos);
qreal scale = _scale;
_zoom = z;
@ -466,7 +469,7 @@ void PathView::zoom(int z, const QPointF &pos)
&& br.height() < viewport()->size().height())
centerOn(br.center());
else
centerOn(pos * scale/_scale);
centerOn((spos * (scale/_scale)) - offset);
_mapScale->setZoom(_zoom);
@ -475,14 +478,21 @@ void PathView::zoom(int z, const QPointF &pos)
void PathView::wheelEvent(QWheelEvent *event)
{
if (_tracks.isEmpty() && _routes.isEmpty() && _waypoints.isEmpty())
return;
QPointF pos = mapToScene(event->pos());
int z = (event->delta() > 0) ?
qMin(_zoom + 1, ZOOM_MAX) : qMax(_zoom - 1, ZOOM_MIN);
zoom(z, pos);
zoom(z, event->pos());
}
void PathView::mouseDoubleClickEvent(QMouseEvent *event)
{
if (event->button() != Qt::LeftButton && event->button() != Qt::RightButton)
return;
int z = (event->button() == Qt::LeftButton) ?
qMin(_zoom + 1, ZOOM_MAX) : qMax(_zoom - 1, ZOOM_MIN);
zoom(z, event->pos());
}
void PathView::keyPressEvent(QKeyEvent *event)
@ -495,7 +505,7 @@ void PathView::keyPressEvent(QKeyEvent *event)
z = qMax(_zoom - 1, ZOOM_MIN);
if (z >= 0)
zoom(z, mapToScene(QRect(QPoint(), size()).center()));
zoom(z, QRect(QPoint(), size()).center());
else
QWidget::keyPressEvent(event);
}
@ -656,7 +666,7 @@ void PathView::drawBackground(QPainter *painter, const QRectF &rect)
}
}
void PathView::resizeEvent(QResizeEvent *e)
void PathView::resizeEvent(QResizeEvent *event)
{
if (_tracks.isEmpty() && _routes.isEmpty() && _waypoints.isEmpty())
return;
@ -668,12 +678,12 @@ void PathView::resizeEvent(QResizeEvent *e)
QRectF ba = br.adjusted(-Tile::size(), -Tile::size(), Tile::size(),
Tile::size());
if (ba.width() < e->size().width()) {
qreal diff = e->size().width() - ba.width();
if (ba.width() < event->size().width()) {
qreal diff = event->size().width() - ba.width();
ba.adjust(-diff/2, 0, diff/2, 0);
}
if (ba.height() < e->size().height()) {
qreal diff = e->size().height() - ba.height();
if (ba.height() < event->size().height()) {
qreal diff = event->size().height() - ba.height();
ba.adjust(0, -diff/2, 0, diff/2);
}
@ -683,7 +693,7 @@ void PathView::resizeEvent(QResizeEvent *e)
resetCachedContent();
}
void PathView::paintEvent(QPaintEvent *e)
void PathView::paintEvent(QPaintEvent *event)
{
QPointF scenePos = mapToScene(rect().bottomRight() + QPoint(
-(SCALE_OFFSET + _mapScale->boundingRect().width()),
@ -691,5 +701,5 @@ void PathView::paintEvent(QPaintEvent *e)
if (_mapScale->pos() != scenePos && !_plot)
_mapScale->setPos(scenePos);
QGraphicsView::paintEvent(e);
QGraphicsView::paintEvent(event);
}

7
src/pathview.h
View File

@ -74,14 +74,15 @@ private:
qreal mapScale(int zoom) const;
void rescale(qreal scale);
void rescale();
void zoom(int z, const QPointF &pos);
void zoom(int z, const QPoint &pos);
void updatePOIVisibility();
void mouseDoubleClickEvent(QMouseEvent *event);
void wheelEvent(QWheelEvent *event);
void keyPressEvent(QKeyEvent *event);
void drawBackground(QPainter *painter, const QRectF &rect);
void resizeEvent(QResizeEvent *e);
void paintEvent(QPaintEvent *e);
void resizeEvent(QResizeEvent *event);
void paintEvent(QPaintEvent *event);
QGraphicsScene *_scene;
ScaleItem *_mapScale;