[qt] Add Night Mode to preferences dialog

Signed-off-by: Ferenc Géczi <ferenc.gm@gmail.com>

indexer/map_style.cpp

@@ -64,3 +64,41 @@ bool MapStyleIsDark(MapStyle mapStyle)
   }
   return false;
 }
+
+MapStyle GetDarkMapStyleVariant(MapStyle mapStyle)
+{
+  if (MapStyleIsDark(mapStyle) || mapStyle == MapStyleMerged)
+    return mapStyle;
+
+  switch (mapStyle)
+  {
+  case MapStyleDefaultLight:
+    return MapStyleDefaultDark;
+  case MapStyleVehicleLight:
+    return MapStyleVehicleDark;
+  case MapStyleOutdoorsLight:
+    return MapStyleOutdoorsDark;
+  default:
+    ASSERT(false, ());
+    return MapStyleDefaultDark;
+  }
+}
+
+MapStyle GetLightMapStyleVariant(MapStyle mapStyle)
+{
+  if (!MapStyleIsDark(mapStyle))
+    return mapStyle;
+
+  switch (mapStyle)
+  {
+  case MapStyleDefaultDark:
+    return MapStyleDefaultLight;
+  case MapStyleVehicleDark:
+    return MapStyleVehicleLight;
+  case MapStyleOutdoorsDark:
+    return MapStyleOutdoorsLight;
+  default:
+    ASSERT(false, ());
+    return MapStyleDefaultLight;
+  }
+}

indexer/map_style.hpp

@@ -23,3 +23,5 @@ extern MapStyle MapStyleFromSettings(std::string const & str);
 extern std::string MapStyleToString(MapStyle mapStyle);
 extern std::string DebugPrint(MapStyle mapStyle);
 extern bool MapStyleIsDark(MapStyle mapStyle);
+extern MapStyle GetDarkMapStyleVariant(MapStyle mapStyle);
+extern MapStyle GetLightMapStyleVariant(MapStyle mapStyle);

platform/settings.cpp

@@ -24,6 +24,7 @@ std::string_view kMeasurementUnits = "Units";
 std::string_view kMapLanguageCode = "MapLanguageCode";
 std::string_view kDeveloperMode = "DeveloperMode";
 std::string_view kDonateUrl = "DonateUrl";
+std::string_view kNightMode = "NightMode";
 
 StringStorage::StringStorage() : StringStorageBase(GetPlatform().SettingsPathForFile(SETTINGS_FILE_NAME)) {}
 

platform/settings.hpp

@@ -13,6 +13,7 @@ extern std::string_view kMeasurementUnits;
 extern std::string_view kDeveloperMode;
 extern std::string_view kMapLanguageCode;
 extern std::string_view kDonateUrl;
+extern std::string_view kNightMode;
 
 template <class T>
 bool FromString(std::string const & str, T & outValue);

platform/style_utils.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+namespace style_utils
+{
+enum class NightMode : uint8_t
+{
+  Off = 0,
+  On = 1,
+};
+
+}  // namespace style_utils

qt/preferences_dialog.cpp

@@ -1,11 +1,13 @@
 #include "qt/preferences_dialog.hpp"
 
+#include "indexer/map_style.hpp"
 #include "coding/string_utf8_multilang.hpp"
 #include "map/framework.hpp"
 
 #include "platform/measurement_utils.hpp"
 #include "platform/preferred_languages.hpp"
 #include "platform/settings.hpp"
+#include "platform/style_utils.hpp"
 
 #include <QtGui/QIcon>
 #include <QLocale>
@@ -134,6 +136,38 @@ namespace qt
       });
     }
 
+    QButtonGroup * nightModeGroup = new QButtonGroup(this);
+    QGroupBox * nightModeRadioBox = new QGroupBox("Night Mode");
+    {
+      using namespace style_utils;
+      QHBoxLayout * layout = new QHBoxLayout();
+
+      QRadioButton * radioButton = new QRadioButton("Off");
+      layout->addWidget(radioButton);
+      nightModeGroup->addButton(radioButton, static_cast<int>(NightMode::Off));
+
+      radioButton = new QRadioButton("On");
+      layout->addWidget(radioButton);
+      nightModeGroup->addButton(radioButton, static_cast<int>(NightMode::On));
+
+      nightModeRadioBox->setLayout(layout);
+
+      int i;
+      if (!settings::Get(settings::kNightMode, i))
+      {
+        i = static_cast<int>(MapStyleIsDark(framework.GetMapStyle()) ? NightMode::On : NightMode::Off);
+        settings::Set(settings::kNightMode, i);
+      }
+      nightModeGroup->button(i)->setChecked(true);
+
+      void (QButtonGroup::* buttonClicked)(int) = &QButtonGroup::idClicked;
+      connect(nightModeGroup, buttonClicked, [&framework](int i)
+      {
+        NightMode nightMode = static_cast<NightMode>(i);
+        settings::Set(settings::kNightMode, i);
+        framework.SetMapStyle((nightMode == NightMode::Off) ? GetLightMapStyleVariant(framework.GetMapStyle()) : GetDarkMapStyleVariant(framework.GetMapStyle()));
+      });
+    }
 
 #ifdef BUILD_DESIGNER
     QCheckBox * indexRegenCheckBox = new QCheckBox("Enable auto regeneration of geometry index");
@@ -168,6 +202,7 @@ namespace qt
     finalLayout->addWidget(developerModeCheckBox);
     finalLayout->addWidget(mapLanguageLabel);
     finalLayout->addWidget(mapLanguageComboBox);
+    finalLayout->addWidget(nightModeRadioBox);
 #ifdef BUILD_DESIGNER
     finalLayout->addWidget(indexRegenCheckBox);
 #endif