Make items-changed never emit 2 signals, instead, always emit only one,
potentially by extending the range reported in items-changed.
And be a lot more exhaustive about autoselect tests.
1. Do not make position an inout variable
The function is meant to return a range for a given position, not modify
a position. So it makes no conceptual sense to use an inout variable.
2. Pass the selected state as an out variable
Using a boolean return value - in particular in an interface full of
boolean return values - makes the return value intuitively feel like a
success/failure return. Using an out variable clarifies the usage.
3. Allow passing every position value
Define what happens when position >= list.n_items
4. Clarify the docs about how this function should behave
In particular, mention the case from point (3)
5. Add more tests
Again, (3) needs testing.
Ironically, these properties are too good - they always
give you a proper value, which is unfortunately different
from the declared default value, which is NULL. So, don't
check these.
Instead of adding them and waiting for the changed signal to be emitted
in the main loop, there might be a race where the change signal is
emitted before we have a chance of spinning the loop.
The position child property is problematic, since it
requires us to emit notification for all children when
inserting a child early in the list of children.
Remove the property from all ui files.
The tree is not needed to walk around the nodes.
It is however still needed for anything that requires modifying the
tree.
There is no immediate benefit in changing this API, but there might be
situations in the future where we can avoid looking up the tree when we
just want to check some details about the node.
The executable is called autotestkeywords, so we shouldn't try to run
an executable named keywords. Also rename the metadata file to match.
Signed-off-by: Simon McVittie <smcv@debian.org>
After removing elements, there were a few cases where the tree wasn't
properly balanced which could further down violate assumptions about the
layout.
Attached is the original testcase that triggered it. I didn't bother
simplifying it.
This model just takes an object and a property name and recursively
looks it up. In particular, I want it for:
widget, widget.parent, widget.parent.parent, ...
This patch does multiple things:
1. Add a custom persistent per-row object.
2. Move all per-row API to that object. This means notifications are now
possible.
3. Add a "passthrough" construct-only property to the TreeListModel that
influences if the model returns these new object or passes through
the ones from the model.
This greatly simplifies the code needed to be written for widgetry,
because one can just connect the per-row object to the expanders that
expand and collapse rows.
As an added power feature, these objects can also be passed through
further models (like filter models).
It also adds kind of a hack to Adwaita to make the test look neat.
The intention of this check was to skip the keyword
test if no c++ compiler is found. But the meson
docs say that add_languages() will abort unless we
pass required: false.
