I am still suspicious the cleanup mechanism for child widgets works as expected...
But right now, we can't verify that, since on shutdown we get an assertion failure
from ld.so "dl-close.c: 762: _dl_close: Assertion `map->l_init_called' failed!"
Seems we're loading the GUI plugin not properly
- define tasks to be addressed during investigation
- read documentation, identify problematic aspects
- prepare a child widget class to be placed on the canvas
My intention is to use this space for experiments first,
and then as a construction site for a rewrite of the
custom timeline widget.
We really need a rewrite here, in order to be properly
aligned to the standard way of writing such a custom widget,
and also to build our first connection to the UI-Bus and then
remove the old placeholder UI model
Damn sideeffect of the suppport for move-only types: since we're
moving our binding now into place /after/ construction, in some cases
the end() iterator (embedded in RangeIter) becomes invalid. Indeed this
was always broken, but didn't hurt, as long as we only used vectors.
Solution: use a dedicated init() hook, which needs to be invoked
*after* the TreeMutator has been constructed and moved into the final
location in the stack buffer.
...this is the first attempt to integrate the Diff-Framework into (mock) UI code.
Right now there is a conceptual problem with the representation of attributes;
I tend to reject idea of binding to an "attribute map"
the generic typing to DiffMutatble does not make much sense,
since the desired implementation within gui::ctrl::Nexus
is bound to work on Tangibles only, since that is what
the UI-Bus stores in the routing table
This basically finishes definition of the fundamental
UI-Element and Bus protocol -- with one notable exception:
how to mutate elements by diff.
This will be the next topic to address
- suppres sending redundant stat mark messages from MockElm
- emit a "reset" state mark when an actual reset happens
- let the PresentationStateManager discard recorded special state
when receiving a "reset" mark for a given element
I assumed that, since GenNode is composed of copyable and
assignable types, the standard implementation will do.
But I overlooked the run time type check on the opaque
payload type within lib::Variant. When a type mismatch
is detected, the default implementation has already
assigned and thus altered the IDs.
So we need to roll our own implementation, and to add
insult to injury, we can't use the copy-and-swap idiom either.
This is actually a STL library feature, and was added precisely
for the reason encountered here: if we want logarithmic search,
we'll have to construct a new GenNode object, just to have something
for the set to invoke the comparison operator.
C++14 introduced the convention that the Comparator of the set
may define a marker type `is_transparent` alongside with a generic
comparison operator. But, as is obvious from the source code of
our GNU Standard library implementation, our std::set has no such
overload to make use of that feature
http://en.cppreference.com/w/cpp/container/set/findhttp://stackoverflow.com/questions/20317413/what-are-transparent-comparators
The only good thing is that, just 10 minutes ago, I felt like
a complete moron because I'm writing a unit test for such a simple
storage class. ;-)
...and I made the decision *not* to consider any kind of
generic properties for now. YAGNI.
UI coding is notorious spaghetti code.
No point in fighting that, it is just the way it is,
because somewhere you're bound to get concrete, hands-on.
right now, what we actually need here is just some integer,
so the GenNode payload is typed to int (or just to anything
different than a Record, because the Record signals that
we intend to bind, not to invoke the command)
...when the Test-Nexus processes a command binding message.
In the real system of course we do not want to log every bind message.
The challenge here is the fact that command binding as such
is opaque, and the types of the data within the bind message
are opaque as well. Finally I settled on the compromise
to log them as strings, but only the DataCap part;
most value types applicable within GenNode
have a string representation to match.
based on the previous experiments, this adds a fake operation
and a definition frame to hook this operation as pseudo Proc-Layer command
WIP: the invocation itself is not yet implemented.
We need to build a custom invocation pattern for that,
in order to be able to capture the instance-ID of the command
on invocation
NOTE: also, because of #989, we can not bind a time value for this test
basically this comes down to provide some convenience fixture
within the test::Nexus, which automatically generates and wires
mock commands.
Not sure if this is even possible to the extent envisioned here
- remove unnecessary includes
- expunge all remaining usages of boost::format
- able to leave out the expliti string(elm) in output
- drop various operator<<, since we're now picking up
custom string conversions automatically
- delete diagnostics headers, which are now largely superfluous
- use newer helper functions occasionally
I didn't blindly change any usage of <iostream> though;
sometimes, just using the output streams right away
seems adequate.
I worked under the erroneous assumption, that Doxygen
will use its internal entity-IDs as the link-IDs when
generating mardown-links. Yes, this seemed logical and
this would be the way I'd implement it....
But seemingly, Doxygen is not so consistent when it
comes to questions of syntax. The same holds true for
markdown, which lacking a coherent definition anyway.
Another problem is that Doxygen's auto-link generation
frequently fails, for reasons not yet clear to me.
Sometimes it seems to be necessary to give it a nudge
by including the \ref command. While I'm not willing
to go into focussed invstigation of Doxygen syntax
right now, at least I've done a search-and-replace
to remove the malformed links I've written the
last days
the initial draft of this concept is in place now, and
the first round of unit tests pass. I've got some understanding
of the purpose of the interactions and involved elements
and I'm confident this design is evolving in a sane way.
Note: extensive documentation is in the TiddlyWiki,
here I've just pasted and reworded some paragraphs from there
and integrated them into the Doxygen docs
