Controllers don't have any GUI and don't depend on the frontend
technology.
Views are implemented in a specific GUI tech (QtWidgets, QtQuick, etc).
For now only QtWidgets work. There's still a lot to decouple.
This will make it easier to introduce non-Qt backends.
addDockWidget() received a AddingOption enumerator. But that
enum isn't enough, as we also want to be able to specify an initial
QSize.
So, instead of adding yet another parameter to addDockWidget(), we
create a struct to old those "initial settings".
Implies a minor source break, but trivial to fix in user code,
just rename the enumerator.
Honouring preferredSize will be a followup.
Needed for issue #95
When restoring a layout it can happen that the widget has
different size constraints when being restored, so this warning
was benign. There's a chekcSanity() later, so that's what's matters
The layouting was becoming too complex to maintain and to introduce
new features. Was even buggy, the fuzzer was constantly finding
bugs, which took hours to workaround.
Problem with the old layout engine is that there was a catch 22, between
Items driving the separators, and separators driving the anchors.
The new layout is much simpler, both in implementation and conceptually.
There's simply a recursive hierarchy of Item elements. An Item can either
have a QWidget to show, or be a ItemContainer, which contains Item children,
and so forth. Each ItemContainer is either vertical or horizontal. That's enough
to represent the "nested multi-splitter" concept which KDDW uses.
After each item insertion/deletion/resize, the separators are regenerated. They
are essentially dumb now.
TODO:
- Separators are drawn, but are not interactive yet
- There's 5 tests failing
- LayoutSaver scalling functionality
And renamed it to 17.json, as we already have an unrelated 2.json.
The removed check isn't needed, as we'll check again when we
finish restoring the placeholder. It was also a false-positive
warning sometimes because boundPositionForAnchor() would fail
since the "anchors following" wasnt initialized yet, as we do
a clearAnchorsFollowing while restoring the placeholder
