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statistics: create themes on demand

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Create the themes only when needed (singleton pattern). If
the themes should do more than colors, such as for example
fonts, it is not clear whether that can be done before main()
runs. By creating the themes on demand, the Qt UI should
be initialized in the constructors of the themes.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-02-21 16:17:24 +01:00 • committed by Dirk Hohndel
parent 7f1107408d
commit 5f91c69f9c
4 changed files with 21 additions and 10 deletions
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18
stats/statscolors.cpp
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@ -1,5 +1,7 @@
#include "statscolors.h"
#include "statstranslations.h"
#include "core/globals.h"
#include <array>
// Colors created using the Chroma.js Color Palette Helper
// https://vis4.net/palettes/#/50|d|00108c,3ed8ff,ffffe0|ffffe0,ff005e,743535|1|1
@ -143,6 +145,16 @@ private:
}
};
static StatsThemeLight statsThemeLight;
static StatsThemeDark statsThemeDark;
std::vector<const StatsTheme *> statsThemes = { &statsThemeLight, &statsThemeDark };
// Currently, we only support two themes: bright and dark.
// The themes are generated on first use. Thus, the constructors are run
// once the overall application is initialized. This ensures that the themes'
// constructors can access the settings, etc.
static std::array<const StatsTheme *, 2> statsThemes;
const StatsTheme &getStatsTheme(bool dark)
{
if (!statsThemes[0]) {
statsThemes[0] = make_global<StatsThemeLight>();
statsThemes[1] = make_global<StatsThemeDark>();
}
return *statsThemes[dark ? 1 : 0];
}