On Qt doc website in QHeaderView class i found two signals with similar descriptions:
void QHeaderView::sectionDoubleClicked(int logicalIndex)
and
void QHeaderView::sectionHandleDoubleClicked(int logicalIndex)
what's the difference between the two of these? When should I use the first, and when the other?
CodePudding user response:
Although the documentation strings are exactly the same,
void QHeaderView::sectionDoubleClicked(int logicalIndex)
This signal is emitted when a section is double-clicked. The section's logical index is specified by logicalIndex.
[signal]void QHeaderView::sectionHandleDoubleClicked(int logicalIndex)
This signal is emitted when a section is double-clicked. The section's logical index is specified by logicalIndex.
The signals are emitted in different cases. From KDE's copy of Qt5,
void QHeaderView::mouseDoubleClickEvent(QMouseEvent *e)
{
...
int handle = d->sectionHandleAt(pos);
if (handle > -1 && sectionResizeMode(handle) == Interactive) {
emit sectionHandleDoubleClicked(handle);
...
} else {
emit sectionDoubleClicked(logicalIndexAt(e->position().toPoint()));
}
}
The documentation doesn't make it particularly clear, though, when "handles" might be present and when they aren't. At a guess, if your sections are resizable you may get a handle -- for resizing -- and then you can (double) click on either the handle or the section-body.