using std::abs;
using std::back_inserter;
using std::copy;
+using std::dynamic_pointer_cast;
using std::max;
using std::min;
using std::none_of;
return nullptr;
}
+void Viewport::item_hover(const shared_ptr<ViewItem> &item)
+{
+ if (item)
+ setCursor(dynamic_pointer_cast<RowItem>(item) ?
+ Qt::SizeVerCursor : Qt::SizeHorCursor);
+ else
+ unsetCursor();
+}
+
void Viewport::drag()
{
drag_offset_ = view_.offset();
void Viewport::drag_by(const QPoint &delta)
{
- if (isnan(drag_offset_))
+ // Use std::isnan() instead of isnan(), the latter can cause issues.
+ if (std::isnan(drag_offset_))
return;
view_.set_scale_offset(view_.scale(), drag_offset_ -
view_.zoom(-2.0, event->x());
}
-void Viewport::wheelEvent(QWheelEvent *event)
+void Viewport::wheelEvent(QWheelEvent *e)
{
- assert(event);
-
- if (event->orientation() == Qt::Vertical) {
- // Vertical scrolling is interpreted as zooming in/out
- view_.zoom(event->delta() / 120, event->x());
- } else if (event->orientation() == Qt::Horizontal) {
+ assert(e);
+
+ if (e->orientation() == Qt::Vertical)
+ {
+ if (e->modifiers() & Qt::ControlModifier) {
+ // Vertical scrolling with the control key pressed
+ // is intrepretted as vertical scrolling
+ view_.set_v_offset(-view_.owner_visual_v_offset() -
+ (e->delta() * height()) / (8 * 120));
+ } else {
+ // Vertical scrolling is interpreted as zooming in/out
+ view_.zoom(e->delta() / 120, e->x());
+ }
+ }
+ else if (e->orientation() == Qt::Horizontal)
+ {
// Horizontal scrolling is interpreted as moving left/right
view_.set_scale_offset(view_.scale(),
- event->delta() * view_.scale()
- + view_.offset());
+ e->delta() * view_.scale() + view_.offset());
}
}