-void DecodeTrace::hover_point_changed()
-{
- if (hover_point_is_over_trace())
- show_hover_annotation();
- else
- hide_hover_annotation();
+ QFontMetrics m(QToolTip::font());
+ const QRect text_size = m.boundingRect(QRect(), 0, ann);
+
+ // This is OS-specific and unfortunately we can't query it, so
+ // use an approximation to at least try to minimize the error.
+ const int padding = 8;
+
+ // Make sure the tool tip doesn't overlap with the mouse cursor.
+ // If it did, the tool tip would constantly hide and re-appear.
+ // We also push it up by one row so that it appears above the
+ // decode trace, not below.
+ hp.setX(hp.x() - (text_size.width() / 2) - padding);
+
+ hp.setY(get_visual_y() - (row_height_ / 2) +
+ (hover_row * row_height_) -
+ row_height_ - text_size.height() - padding);
+
+ QToolTip::showText(view->viewport()->mapToGlobal(hp), ann);