statistics: add a header file defining z-values

z-values determine the order in which objects on the chart are
painted. To reduce chaos, collect all z-values in a header file.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-02 10:25:04 +01:00 committed by Dirk Hohndel
parent fdde4c23ea
commit 3b26f6a767
3 changed files with 23 additions and 3 deletions

17
stats/zvalues.h Normal file
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// SPDX-License-Identifier: GPL-2.0
// Defines the z-values of features in the chart view.
// Objects with higher z-values are painted on top of objects
// with smaller z-values. For the same z-value objects are
// drawn in order of addition to the graphics scene.
#ifndef ZVALUES_H
struct ZValues {
static constexpr double axes = 0.0;
static constexpr double series = 11.0;
static constexpr double seriesLabels = 12.0;
static constexpr double chartFeatures = 13.0; // quartile markers and regression lines
static constexpr double informationBox = 14.0;
static constexpr double legend = 15.0;
};
#endif