Use json file based themes instead of code to create them (theme editor + theme mode settings)

common/themes/appearance_configuration.cpp

@@ -0,0 +1,96 @@
+#include "appearance_configuration.h"
+
+#include <QSettings>
+
+static constexpr auto kGroup = "Appearance";
+static constexpr auto kMode = "ThemeMode";
+static constexpr auto kLightId = "LightThemeId";
+static constexpr auto kDarkId = "DarkThemeId";
+static constexpr auto kFixedId = "FixedThemeId";
+
+static QString themeModeToString(ThemeMode mode)
+{
+    switch (mode) {
+    case ThemeMode::FollowSystem:
+        return "FollowSystem";
+    case ThemeMode::Light:
+        return "Light";
+    case ThemeMode::Dark:
+        return "Dark";
+    case ThemeMode::ForcedTheme:
+        return "ForcedTheme";
+    }
+    return "FollowSystem";
+}
+
+static ThemeMode themeModeFromString(const QString &s)
+{
+    if (s == "Light")
+        return ThemeMode::Light;
+    if (s == "Dark")
+        return ThemeMode::Dark;
+    if (s == "ForcedTheme")
+        return ThemeMode::ForcedTheme;
+    return ThemeMode::FollowSystem;
+}
+
+AppearanceConfiguration::AppearanceConfiguration(const QString &settingsFilePath, QObject *parent)
+    : QObject(parent), path(settingsFilePath)
+{
+    load();
+}
+
+void AppearanceConfiguration::load()
+{
+    QSettings s(path, QSettings::IniFormat);
+    s.beginGroup(kGroup);
+    sel.mode = themeModeFromString(s.value(kMode, "FollowSystem").toString());
+    sel.lightThemeId = s.value(kLightId, sel.lightThemeId).toString();
+    sel.darkThemeId = s.value(kDarkId, sel.darkThemeId).toString();
+    sel.fixedThemeId = s.value(kFixedId, sel.fixedThemeId).toString();
+    s.endGroup();
+}
+
+void AppearanceConfiguration::write(const QString &key, const QString &value)
+{
+    QSettings s(path, QSettings::IniFormat);
+    s.beginGroup(kGroup);
+    s.setValue(key, value);
+    s.endGroup();
+}
+
+void AppearanceConfiguration::setMode(ThemeMode mode)
+{
+    if (sel.mode == mode)
+        return;
+    sel.mode = mode;
+    write(kMode, themeModeToString(mode));
+    emit selectionChanged();
+}
+
+void AppearanceConfiguration::setLightThemeId(const QString &id)
+{
+    if (sel.lightThemeId == id)
+        return;
+    sel.lightThemeId = id;
+    write(kLightId, id);
+    emit selectionChanged();
+}
+
+void AppearanceConfiguration::setDarkThemeId(const QString &id)
+{
+    if (sel.darkThemeId == id)
+        return;
+    sel.darkThemeId = id;
+    write(kDarkId, id);
+    emit selectionChanged();
+}
+
+void AppearanceConfiguration::setFixedThemeId(const QString &id)
+{
+    if (sel.fixedThemeId == id)
+        return;
+    sel.fixedThemeId = id;
+    write(kFixedId, id);
+    emit selectionChanged();
+}