This was a user request: Sort bar charts by height of the bars.
Obviously, this can only work for categorical charts, not for
histograms.
The UI is a break from the old concept: the sorting is chosen
based on the chart, whereas for the rest of the features, the
viable charts are presented based on the binning, etc.
I found it confusing to have the possible charts be selected
based on sorting. I.e. if a non-bin sort mode is selected,
the histogram charts disappear. On the flip side, this would
be more consistent. We can change it later.
For value-based bar charts, there are three sort modes: by
bin, by count (i.e. number of dives in that bar) and by
value (i.e. length of the bar). This hopefully satisfies all
needs.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This silences a Coverity warning. In principle, this should
never happen, since there are no slices if totalCount is 0.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This silences a Coverity warning. That what harmless, but
it's probably good practice to initialize all members.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
For all the series but the scatter series (which supports
lasso selection), implement a range-selection using shift.
The code is fairly similar for all series and one might
think about factoring it out. But why bother?
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Multiple selection using ctrl was only supported for
scatter series. Factor out the corresponding code and
use it in all series.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Up to now, we passed a "shiftPressed" flag to the individual
selection functions. To be more general replace by a struct
with "shift" and "ctrl" flags.
While doing this:
1) Move the struct into a new statsselection file for better
encapsulation.
2) Change shift to control in the scatter series, since individual
selection of items is usually done with control, not shift.
Shift usually means "select range".
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
In analogy to the other charts, highlight selected pie slices.
Overlay them with a checkerboard pattern, like in the bar charts.
Since all charts now support highlighting, the divesSelected()
virtual function now doesn't need a default implementation
anymore.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Allow the user to select regions of the scatter plot using
a rectangular selection. When shift is pressed, do an
incremental selection.
Unfortunately, the list-selection code is so slow that this
becomes unusable for a large number of selected dives.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Somewhat improve selection mechanics in the scatter-plot by
allowing additional selections with shift-clicking. When the
dives under the mouse are already selected, then deselect them.
This appears to be a rather common UI idiom in desktop
applications.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
When clicking on items in a plot, select the corresponding
dives. This can be useful for data validation.
Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
If we want to make bar charts selectable (when clicking on a
bar select the dives the bar represents), then we must store
the dives behind bars. Therefore, use dive-based bins instead
of count based bins in bar charts and pie charts. This gave
some churn because every structure where a count is stored
has to be changed to store a vector of dives. Try to use
move semantics where possible to avoid duplication of dive
lists.
On a positive note, the count_dives() function of the
binners can now be removed, since it is unused.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Placing labels at half-integer values gives horrible
rendering artifacts. Therefore, always round to integer
values. The easiest way to do this is right before setting
the position. Introduce a helper function to round QPointF
in such scenarios.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The labels in bar an pie charts are realized as individual
QSG pixmap nodes with an alpha channel. Sadly, rendering
bright labels onto a transparent background gives very
ugly artifacts.
As a stop gap measure, until the problem is understood,
render on a background with the color of the pie slice
or bar.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Up to now, when the user changed the visibility of chart features
(legend, quartiles, labels, etc.) the whole chart was replot.
Instead, only change the visibility status of these items.
After all, this modularity is one of the things the conversion
to QSG was all about.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The code was wrong, because it deleted the ChartItems in the
main UI thread, not the render thread. This would delete the
QSG nodes in the UI thread and then crash on mobile.
Therefore refactor this part of the code by adding the
items to be deleted to a list that will be deleted by the
render thread.
As a drop in replacement of std::unique_ptr, implement
a silly ChartItemPtr class, which auto-initializes to null.
This turns the deterministic and easily controlled memory
management into a steaming pile of insanity. Obviously,
this can be made much more elegant, but this has to do for now.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
All series are converted to QSG. Thus, the pointer to the
QGraphicsView can be removed from the common base class.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Since there are no disk-segment QSG primitives (one could draw
a triangle fan, but that doesn't seem optimal), this draws
into a pixmap and blits that as a QSG node.
Since this is the only series without axis, it needs a function
that returns the size of the plot area. This didn't exist, so
add it.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
A small step in converting from QGraphicsScene to QQuickItem.
This is the second item to be converted (after the legend)
and for now items are drawn in order of creation, which means
that the infobox is on top of the legend. This will have
to be made deterministic in follow-up commits.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The series were passed a pointer to the QGraphicsScene to add
their item. In the future these items will be replaced by
QSGNodes. To add these, the series need a reference to the StatsView.
Therefore pass it in the constructor. Once everything is
replaces by QSGNodes, remove the QGraphicsScene member.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Android and iOS use qmake, so add the code to the .pro file.
This also removes all remnants of QCharts includes and uses and all the
references to QCharts in our various build systems.
That was a brief but extremely useful detour.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
It turns out that the wrong base class was used for the chart.
QQuickWidget can only be used on desktop, not in a mobile UI.
Therefore, turn this into a QQuickItem and move the container
QQuickWidget into desktop-only code.
Currently, this code is insane: The chart is rendered onto a
QGraphicsScene (as it was before), which is then rendered into
a QImage, which is transformed into a QSGTexture, which is then
projected onto the device. This is performed on every mouse
move event, since these events in general change the position
of the info-box.
The plan is to slowly convert elements such as the info-box into
QQuickItems. Browsing the QtQuick documentation, this will
not be much fun.
Also note that the rendering currently tears, flickers and has
antialiasing artifacts, most likely owing to integer (QImage)
to floating point (QGraphicsScene, QQuickItem) conversion
problems. The data flow is
QGraphicsScene (float) -> QImage (int) -> QQuickItem (float).
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Replace by custom implementation, with the ultimate goal to
remove the QtCharts module. This doesn't yet display axis
titles or a grid.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Implement a simple count-based pie chart. Percentage labels
are shown in the pie slices, the names outside the pie slices.
On hovering over a slice, the actual counts are shown.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
