Commit graph

185 commits

Author SHA1 Message Date
Dirk Hohndel
9463e7895b Don't print partial pressure values in the profile
Instead provide a scale on the right in a highly transparent grey and rely
on the tooltip available with mouse-over to pinpoint the value at certain
spots with much better accuracy.

Fixes #30

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-09 14:36:56 -08:00
Dirk Hohndel
8dfc4dccc5 Don't print an initial gaschange event that just tells us the gas used
Some dive computers appear to tell us the gas used in a gaschange event
right at the beginning of the dive. We arbitrary have a cut-off that says
"a gas change in the first 30 seconds shouldn't get a marker".

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-08 21:23:45 -08:00
Dirk Hohndel
07b74007f1 Correct partial pressure calculations
Regardless what the dive computer tells us, don't believe that pO2 was
higher than the ambient pressure. This gives much more realistic values.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-08 21:23:45 -08:00
Dirk Hohndel
02844c3a10 Correctly parse the two different gas change events
This now takes the He percentage into account when matching tanks. Given
the encoding of fO2 and fHe in the GASCHANGE2 event, we can simply mask
and shift as if we have a GASCHANGE2 event and things will automatically
work correctly for the regular GASCHANGE event.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-08 21:23:27 -08:00
Dirk Hohndel
9bcd21bf67 Draw pO2 profile last
This way it sits on top of the other partial pressure plots and is a bit
easier to read.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-08 14:07:10 -08:00
Dirk Hohndel
40d05ed768 Show two decimal digits in pO2, pN2 and pHe in the tooltip
Tec divers seem to like a little bit more precision - and the dive
computers certainly provide it (or we can calculate it).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-08 13:58:14 -08:00
Dirk Hohndel
3b425b4c13 Plot pO2 graph based on sample information, if available
This should give closed circuit divers with a supported dive computer
correct partial pressure plots.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-07 21:05:21 -08:00
Dirk Hohndel
a0f28aa422 Add option to make ceiling visually stand out more in the profile
While having the background "come down" seemed like a good visualization
of the ceiling, some divers appear to prefer something more dramatic. This
adds an option to the Tec Settings to have the ceiling shown in red
instead of the default background color.

Suggested-by: Jan Schubert <Jan.Schubert@GMX.li>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-07 11:39:15 -08:00
Dirk Hohndel
982abb5596 Move partial pressure plots up slightly
This way they don't clash with the dive computer model information that
was added by commit a23ec27ca7bb "Add dive computer name to the dive
plot".

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-07 10:49:02 -08:00
Linus Torvalds
0d1f396f3a Move 'plot_info' into 'struct graphics_context'
.. and then allocate just the plot-info entry array dynamically.

We want to have a longer lifetime for the basic plot_info data
structure, because we want to do computer selection and maximum
time/depth/temperature computations *before* we start plotting anything,
and before we allocate the plot entry array.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-07 10:31:26 -08:00
Linus Torvalds
22aa6fa4ef Add dive computer name to the dive plot
I want to have some way to show multiple dive computers, so start off by
adding the name of the current one.  So if we change dive computers,
we'll see it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-07 10:31:22 -08:00
Dirk Hohndel
dcb6574dc4 Improve deco handling and add NDL support
This commit changes the code that was recently introduced to deal with
deco ceilings. Instead of handling these through events we now store the
ceiling (which in reality is the deepest deco stop with all known dive
computers) and the stop time at that ceiling in the samples.

This also adds support for NDL (non stop dive limit) which both dive
computers that appear to give us ceiling / deco information appear to
give us as well (when the diver isn't in deco).

If the mouse hovers over the profile we now add support for displaying the
NDL, the current deco obligation and (if we are able to tell from the
data) whether we are at a safety stop.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-12-04 21:05:26 -08:00
Dirk Hohndel
10fac7a6af Updating events for libdivecomputer 0.3 (and tracking uemis support)
I was a little too eager to add the deco feature to Subsurface. Jef and I
went back and forth a few more times and the definition of those events
changed. I guess I shouldn't have commited that code until the
corresponding libdivecomputer code had been pushed.

This commit now brings us in sync with the current master of
libdivecomputer (but should compile with 0.2 as well - only deco events
won't work then).

One issue that I see is that deco / ndl aren't really a good fit for the
event model. I actually disabled the drawing of the little yellow
triangles for ndl events as for example on the Uemis those events are
created whenever the remaining non stop time changes - and that can be
every few seconds.

The correct solution may be to treat this as a function of the samples,
but for now this works and is tested with both OSTC and Uemis SDA.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-28 21:13:21 -07:00
Linus Torvalds
df3671390d Fix dive computer event handling if there are no samples
This actually triggers for one of our insane test dives (test15): it has
no samples, so we created a fake dive computer entry with the a fake
profile in it, but we didn't copy the events over.

Having a dive with no samples, yet having events from the dive computer,
sounds pretty bogus.  But that test-case did show that when that bogus
situation happens, we had two independent buglets: (a) we didn't insert
the entries in the fake dive computer entry we used and (b) we would
then mix up the events of the fake dive computer entry with the first
dive computer of a dive.

Fix this, just to make test15 happy again.  And eventually, when we
actually plot the information for multiple dive computers, fixing case
(b) would become necessary even for real dives.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-26 21:45:38 -07:00
Linus Torvalds
25b4fee655 Move events and samples into a 'struct divecomputer'
For now we only have one fixed divecomputer associated with each dive,
so this doesn't really change any current semantics.  But it will make
it easier for us to associate a dive with multiple dive computers.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-23 19:36:27 -08:00
Dirk Hohndel
a154d1ccdc Tweak partial pressure plot to avoid printing values ontop of eachh other
This still can look too busy on shallow long dives with moderate vertical
movement.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-12 20:01:12 -08:00
Dirk Hohndel
79798dc15b Improve visual appearance of temperature plot
Prervent tiny temperature changes from being exaggerated in the plot.

Also, shift pressure plot around a bit (if necessary) to prevent it from
ending in the same space as the temperature plato on the profile graph.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-12 18:46:14 -08:00
Dirk Hohndel
ec042222f0 Handle dives without samples correctly
The code in commit f99e1b476b18 "Trim the dive to exclude surface time at
beginning and end" failed rather badly if a dive has no samples at all -
which is true for many of our test dives.

This makes sure that we don't exclude data points if we never set up start
and end times.

Reported-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 17:56:32 +01:00
Linus Torvalds
7fc1213aab Add back mysteriously deleted "} else {" line
Commit 6c52e8a2e5 ("Add plotting of the deco ceiling") for some
totally unexplained reason deleted one "else" statement, resulting in
some plot events not having a time at all.  Which causes various really
odd issues if you hit that situation, including divide-by-zero etc due
to the difference in times between events being nonsensical.

It's just some odd mistake that was entirely unrelated to the other
changes in that commit.

Add the missing line back in.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 17:22:18 +01:00
Dirk Hohndel
502e2b0e86 Add more data to our tool-tip display in the profile window
This shows the values for all the graphs that are shown (depth,
temperature, tank pressure, pO2, pN2m pHe), but also correctly doesn't
display them when they are turned off or no data is available (prior to
this commit, tank pressure was always shown, even if no pressure samples
were available for the dive).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 17:18:14 +01:00
Linus Torvalds
80485114ba Fix possible array bound violation for insanely long dives
When we calculate the interval for the tick-marks for the dive, we need
to limit 'i' to be within the size of the array.  The code does that
with a "i < 8" check, but the fact is, we must never increment past the
last entry, which is 7 (the size of the array is 8, but the last valid
index is 7).

This only happens for unrealistically long dives.  Which you can trigger
either by inputting insane values for a manually created dive, or by
merging two dives that are consecutive, but not close to each other
time-wise (eg on different days ;)

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 15:08:56 +01:00
Linus Torvalds
01e8984d7d Create tool-tip with depth/pressure for the whole profile area
This extends on our current tooltip logic (which shows events when you
mouse over them) to show tooltips for the whole profile area.

If you mouse over an event, that is still shown in the tooltip, but
even in the absense of events, the tooltip will be active, and mousing
over the profile area will show the time, depth and pressure.

This can certainly be improved upon further, but even in this form it is
useful.

Fixes #9

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 14:44:10 +01:00
Dirk Hohndel
7c09991876 Trim the dive to exclude surface time at beginning and end
We don't change any of the samples, we just don't plot (or consider for
dive time / mean calculations) the samples at the beginning or end of the
dive that are less than a certain threshold under water. Right now that's
an arbitrary 75cm which seems to Do The Right Thing(tm) for the dives I
tried this with - but I'm happy to look at other values if this causes
problems for people with dive computers I do not have access to.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 10:36:46 +01:00
Dirk Hohndel
e167108c76 Add depth to mbar helper function
This ensures that we use consistent math to get the absolute pressure at a
certain depth.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-11 08:50:56 +01:00
Dirk Hohndel
836bbad7a6 Add threshold feature for partial pressure graphs
The tec diving preference pane now allows us to set a partial pressure
threshold for each of the three gases. When the partial pressure surpasses
that value, the graph becomes red.

Fixes #12

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-10 17:58:42 +01:00
Dirk Hohndel
6ad73a8f04 Improve logic handling events
We now throw away redundant events, just as we throw away other redundant
data coming from the dive computer. Events are considered redundant if
they are less than 61 seconds apart and identical.

This also improves the display of the remaining events in the profile as
we now show the value of the event, if it is present (for example for a
deco event we show the duration of the deepest stop).

Finally, for events that define a range (so they set the beginning flag
and assume and end flag some time later) we no loger show the triangle but
assume that some other code handles visualizing them (as happens for the
ceiling events).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-10 11:54:15 +01:00
Dirk Hohndel
7db08ae128 Instead of the ugly red boxes make the surface come down to ceiling
Based on suggestions from Linus (and a few iterations) we now simply have
the surface (i.e., background color / pattern) come down to where the
ceiling is. And we only do the angry red shading when the diver violates
the ceiling.

I think this looks much better.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-10 11:54:14 +01:00
Dirk Hohndel
6c52e8a2e5 Add plotting of the deco ceiling
Plot a red-shaded area on top of the depth profile to indicate the deco
ceiling (i.e., the area into which it isn't save to ascend at this point
of the dive.

So far this is of very limited use as libdivecomputer doesn't give us the
necessary information to plot this. I have sent patches for the OSTC to
Jef, hoping that he will include them in an update. I don't know how many
other dive computers will make this data available - I still need to add
this to our native Uemis support.

This commit also fixes two cut and paste errors in the previous commit
6540be9bd924 "Process ceiling events and store ceiling data in plot_info".

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-10 11:54:14 +01:00
Dirk Hohndel
7c9b89e442 Process ceiling events and store ceiling data in plot_info
This just creates the infrastructure but doesn't yet do anything useful
with the data.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-10 11:54:07 +01:00
Dirk Hohndel
51003eaed7 Fix partial pressure calculation
The existing implementation failed on dive computers that did gas changes
based on events (instead of tracking them in the sample data like the
Uemis Zurich does that I tested the code with).

This commit moves the calculations slightly later in create_plot_info()
after the gas change events are processed and the plot_info data has been
fixed up. Now this works with the data from Linus' Suunto as well.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-07 15:06:18 +01:00
Dirk Hohndel
0d33337a20 Remove pN2 debug printout and add disabled code for partial pressure scale
The pN2 print shouldn't have been committed, but I don't want to try and
rewrite all the commit history. Oh well.

The pressure scale I am ambivalent about. It seems that it should be
useful - but that would require guide lines that coincide with the values
which would really throw off the visual for me. So I added the code, but
left it disabled.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-06 06:46:14 +01:00
Dirk Hohndel
1218e7a5e9 Don't print mean depth across the whole profile area
I can't remember why we initially did this instead of ending the
horizontal red line whith the last data point of the pressure profile. But
especially nuw with more graphs shown the one line that extends past the
end of the dive looked really silly.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-06 06:46:14 +01:00
Dirk Hohndel
af939ee4c8 Be smarter about printing gas partial pressure text
We always want to print absolute maxima and minima - but not when multiple
consecutive data points all have the same value (this happens, for
example, when printing a pHe plot on non-helium dives - or when the dive
profile includes a brief surface intervall which causes all the partial
pressures to be at their minimum).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-06 06:46:05 +01:00
Dirk Hohndel
d2edc681a4 Fine tune the vertical spacing of the graphs
Whatever I pick here, there will be dives where the different graphs end
up interfering with each other. I don't think there isn't an easy, generic
solution for this (but I can envision awesome non-easy solutions - they
just don't seem to be worth the effort).

But for most dives that I played with this seems to work pretty well.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-05 20:44:51 -08:00
Dirk Hohndel
853277ba9d Plot text values for partial pressure graphs
The algorithms attempt to identify "interesting" points where the user
might want to know the value of the graph.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-05 08:56:18 -08:00
Dirk Hohndel
5f2f415cdb Add pHe and pN2 plotting
Adjust the color for pN2 to the standard for this gas (black). We keep pO2
green (even though the ISO 32 color for that would be white). pHe is
marked in brown (which is the matching standard color).

Calculate correct partial pressures for the synthetic plot info points at
the beginning and end of the dive.

Minor fine tuning to the positioning / scaling of the temperature plot
when partial pressures are plotted.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-01 15:39:15 -07:00
Dirk Hohndel
f806cdbe2e Fix the pO2 calculation when diving with air
So few of my dives are on air that at first I didn't notice - but for
those dives we set the o2 permille to 0 - which of course causes incorrect
(and extremely deadly) pO2 of 0...

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-01 12:05:31 -07:00
Dirk Hohndel
01fd6a57bc Add vertical space to depth plot if we are showing partial pressure graphs
Fairly simplistic change that modifies the way we calculate the "maxdepth"
for a particular dive as that is used to scale the plot vertically.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-01 11:44:18 -07:00
Dirk Hohndel
bdc6b6ba24 Change preferences into a notebook and add second page for tec settings
Not sure this is the best naming scheme (General Settings / Tec Settings)
but it's a start.

The idea is to have the settings that a recreational diver might care
about on the first page, and all the other stuff on the second one. Let's
see how this works out long term. For now I moved OTU over and added
toggles for the different partial pressure graphs (only the pO2 one is
implemented so far).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-01 11:11:05 -07:00
Dirk Hohndel
1b606ae226 First stab at plotting a pO2 graph
So far this is done unconditionally. This already starts some of the
infrastructure for other gases, but so far only O2 is handled.
We also need a pressure scale on the right to make this useful - or we
need to do peek / trough pressure prints like we do for temperature and
depth.

Finally, I think I want to move the plot further down, maybe make the
whole plot area taller if we are plotting partial gas pressures as well.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-11-01 10:04:12 -07:00
Dirk Hohndel
029db4aae2 Add depth scale to the dive profile
This is intended to be unobtrusive, but add more information for people
who aren't satisfied with the numeric value we put inside the plot to mark
local peaks and troughs.

See ticket #9

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-10-29 10:56:20 -07:00
Dirk Hohndel
016365c5f1 Fix the way we handle translated event names
Here is what Linus reported:

 I think you have made a mistake in trying to translate some of
 libdivecomputer.c

 Translating some of those things based on locale is *wrong*, because
 they are saved in the XML file.

 That covers at least the warnings: they'll get translated when you
 import them, and then saved to the XML file as that translation, but
 now if you start subsurface in another locale, they will not get
 translated back.

 So translating XML file contents is fundamentally buggy. It just
 shouldn't be done.

 So all the "translations" for the event handling are buggy, and
 generate crap. Please don't do that. Leave them as English.

And of course he is absolutely right. However, instead of not translating
them at all, this commit fixes things a better way - we now mark the
strings for translation but store the original English strings everywhere
(in the in-memory data structure as well as in the XML file). Only when we
actually display something on the screen (in a tooltip or in the filter
dialog) do we actually translate the strings into the native language.

This should address both Linus' issue and the desire to have localized
event texts.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-10-21 11:40:30 -07:00
Dirk Hohndel
99846da77f Conversion to gettext to allow localization
This is just the first step - convert the string literals, try to catch
all the places where this isn't possible and the program needs to convert
string constants at runtime (those are the N_ macros).

Add a very rough first German localization so I can at least test what I
have done. Seriously, I have never used a localized OS, so I am certain
that I have many of the 'standard' translations wrong. Someone please take
over :-)

Major issues with this:

- right now it hardcodes the search path for the message catalog to be
  ./locale - that's of course bogus, but it works well while doing initial
  testing. Once the tooling support is there we just should use the OS
  default.

- even though de_DE defaults to ISO-8859-15 (or ISO-8859-1 - the internets
  can't seem to agree) I went with UTF-8 as that is what Gtk appears to
  want to use internally. ISO-8859-15 encoded .mo files create funny
  looking artefacts instead of Umlaute.

- no support at all in the Makefile - I was hoping someone with more
  experience in how to best set this up would contribute a good set of
  Makefile rules - likely this will help fix the first issue in that it
  will also install the .mo file(s) in the correct place(s)

  For now simply run

  msgfmt -c -o subsurface.mo deutsch.po

  to create the subsurface.mo file and then move it to
  ./locale/de_DE.UTF-8/LC_MESSAGES/subsurface.mo

  If you make changes to the sources and need to add new strings to be
  translated, this is what seems to work (again, should be tooled through
  the Makefile):

  xgettext -o subsurface-new.pot -s -k_ -kN_ --add-comments="++GETTEXT" *.c
  msgmerge -s -U po/deutsch.po subsurface-new.pot

  If you do this PLEASE do one commit that just has the new msgid as
  changes in line numbers create a TON of diff-noise. Do changes to
  translations in a SEPARATE commit.

- no testing at all on Windows or Mac
  It builds on Windows :-)

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-10-11 10:03:03 +09:00
Lubomir I. Ivanov
50eac41129 Use GTK_UNIT_INCH when printing to provide consistency across OS
Tests have shown that the most multi-platform way to do printing with GTK is
to use GTK_UNIT_INCH (or GTK_UNIT_MM) with GtkPrintOperation. Tested on
Linux, OSX, Windows.

However this requires the appropriate scaling for Pango and Cairo to be done,
with separate plotting logic for printing and drawing on the screen. To achieve
that, profile.c:plot() now accepts a scaling parameter from type
"scale_mode_t" defined in "display.h".

Also due to new scale, small decimal numbers (such as 6.12345) cannot be well
stored in "cairo_rectangle_int_t" therefore it is replaced with
"cairo_rectangle_t", which uses doubles to provide Cairo with a drawing
area.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

Minor whitespace cleanup.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2012-09-11 07:26:38 -07:00
Mikko Rasa
d6b50e30e4 Fix profile and average depth for freedives
Freedives can easily exceed the assumed ascent/descent rate, which
results in wacky dive profiles.  Add a check to make the ascent and
descent fit within the duration of the dive.
2012-08-29 19:12:18 +03:00
Linus Torvalds
9d46581913 Merge branch 'freediving-tweaks' of git://github.com/mguentner/subsurface
Merge freediving tweaks (zoom in on short dives etc) from Maximilian
Güntner.

Trivial conflicts in display.h due to unrelated printing stuff just
happening to be added nearby.

* 'freediving-tweaks' of git://github.com/mguentner/subsurface:
  moved zoomed_plot to display.h
  plot the time with a fixed padding (leading zero)
  updated/corrected comment
  added "Zoom" button and improved scaling
  fixed indentation
  use increments that make sense for 600 seconds
  Plot shorter (apnea) dives with a reasonable scale
2012-08-28 13:20:23 -07:00
Linus Torvalds
9380f78c82 Do some whitespace cleanup
The previous commit was a patch from Lubomir, which also had some
whitespace fixes (to go with some new whitespace bugs to replace them)
in it.

I removed the whitespace changes from that patch (don't mix whitespace
fixes with other fixes, unless they are on the same lines!) but decided
to look for other whitespace issues, and this is the result.

I left the non-C files alone, some of the spec and script files also
have whitespace at the end of lines etc.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-26 14:41:05 -07:00
Maximilian Güntner
1c1ad77f83 plot the time with a fixed padding (leading zero)
Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
2012-08-22 01:23:54 +02:00
Maximilian Güntner
0c0ec7e4f6 Merge branch 'master' into freediving-tweaks
Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
2012-08-22 01:15:41 +02:00
Linus Torvalds
972669d636 Rework dive selection logic
This completely changes how we keep track of selected dives: instead of
having an array listing the selection ("selectiontracker") or trusting
the gtk selection information, just save the information about whether a
dive is selected in the dive itself.

That makes it trivial to keep track of the state of selection across
group collapse/expand events, or when changing the tree view model.  It
also ends up simplifying the code and logic in other ways.

HOWEVER, it does currently (re-)introduce an annoying oddity with gtk:
if you collapse a dive trip that has individual selections, gtk will
forget those selections ("out of sight, out of mind"), and when you do
*new* selections, the old hidden ones remain.

So there's some games required to make gtk do sane things.  We may need
to either explicitly drop selections when collapsing trips, or make sure
the group entry gets selected when collapsing a group that has
selections in it. Or something.

There may be other issues introduced by this too.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-20 05:48:07 -07:00