Merge pull request #31 from Sclafus/dark-mode-windows10

Dark Mode for Windows

Author: Sclafus

forms/preferences.ui

@@ -357,7 +357,7 @@
            <item>
             <widget class="QRadioButton" name="themesDarkRadio">
              <property name="enabled">
-              <bool>false</bool>
+              <bool>true</bool>
              </property>
              <property name="text">
               <string>Dark</string>
@@ -367,7 +367,7 @@
            <item>
             <widget class="QRadioButton" name="themesLightRadio">
              <property name="enabled">
-              <bool>false</bool>
+              <bool>true</bool>
              </property>
              <property name="text">
               <string>Light</string>

src/mainwindow.cpp

@@ -27,6 +27,7 @@ MainWindow::~MainWindow()
 void MainWindow::setupUi()
 {
 	this->setupStatusbar();
+	this->loadTheme();
 	connect(ui->btnStart, &QPushButton::released, this, &MainWindow::on_init);
 }
 
@@ -43,6 +44,68 @@ void MainWindow::setupStatusbar()
 }
 
 
+
+void MainWindow::loadTheme()
+{
+	#ifdef Q_OS_WIN
+		// If present, prefer the local settings.
+		QSettings settings;
+		bool isDarkMode;
+		auto darkModeSetting = settings.value("theme/darkMode");
+
+		if (!darkModeSetting.isNull()) {
+			isDarkMode = darkModeSetting.toBool();
+			if (isDarkMode) {
+				loadDarkMode();
+			}
+			return;
+		}
+
+		// In windows>=10, you can set a default behaviour for app themes in the settings menu.
+		// TODO: Check for major and minor version of windows.
+		// Perhaps this can be used in linux and macos too?
+		QSettings windowsSettings(
+			"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
+			QSettings::NativeFormat
+		);
+		isDarkMode = windowsSettings.value("AppsUseLightTheme") == 0;
+
+		if (isDarkMode) {
+			loadDarkMode();
+		}
+	#endif
+}
+
+
+void MainWindow::loadDarkMode()
+{
+	qApp->setStyle(QStyleFactory::create("Fusion"));
+	QPalette darkPalette;
+	QColor darkColor = QColor(45,45,45);
+	QColor disabledColor = QColor(127,127,127);
+
+	darkPalette.setColor(QPalette::Window, darkColor);
+	darkPalette.setColor(QPalette::WindowText, Qt::white);
+	darkPalette.setColor(QPalette::Base, QColor(18,18,18));
+	darkPalette.setColor(QPalette::AlternateBase, darkColor);
+	darkPalette.setColor(QPalette::ToolTipBase, Qt::white);
+	darkPalette.setColor(QPalette::ToolTipText, Qt::white);
+	darkPalette.setColor(QPalette::Text, Qt::white);
+	darkPalette.setColor(QPalette::Disabled, QPalette::Text, disabledColor);
+	darkPalette.setColor(QPalette::Button, darkColor);
+	darkPalette.setColor(QPalette::ButtonText, Qt::white);
+	darkPalette.setColor(QPalette::Disabled, QPalette::ButtonText, disabledColor);
+	darkPalette.setColor(QPalette::BrightText, Qt::red);
+	darkPalette.setColor(QPalette::Link, QColor(42, 130, 218));
+	darkPalette.setColor(QPalette::Highlight, QColor(42, 130, 218));
+	darkPalette.setColor(QPalette::HighlightedText, Qt::black);
+	darkPalette.setColor(QPalette::Disabled, QPalette::HighlightedText, disabledColor);
+
+	qApp->setPalette(darkPalette);
+	qApp->setStyleSheet("QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }");
+}
+
+
 void MainWindow::setupSignals()
 {
 	connect(twitchClient, &TwitchClient::connected, this, &MainWindow::on_twitchClient_connected);

src/mainwindow.h

@@ -10,6 +10,7 @@
 #include <QMessageBox>
 #include <QPushButton>
 #include <QSettings>
+#include <QStyleFactory>
 #include <QUrl>
 
 #include "gosumemoryClient.h"
@@ -61,6 +62,8 @@ class MainWindow : public QMainWindow
 		void setupSignals();
 		void setupStatusbar();
 		void setupUi();
+		void loadTheme();
+		void loadDarkMode();
 		QListWidgetItem *getTwitchChatMessage(QString username, QString message);
 		Ui::MainWindow *ui;
 		TwitchClient *twitchClient;

src/preferences/preferences.cpp

@@ -46,6 +46,7 @@ void Preferences::loadSettings()
   loadGosuMemorySettings();
   loadTwitchSettings();
   loadOsuIrcSettings();
+  loadThemeSettings();
 }
 
 
@@ -73,6 +74,26 @@ void Preferences::loadOsuIrcSettings()
 }
 
 
+void Preferences::loadThemeSettings()
+{
+  auto darkModeSetting = settings.value("theme/darkMode");
+  bool isDarkMode;
+
+  if(darkModeSetting.isNull()){
+		QSettings windowsSettings(
+			"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
+			QSettings::NativeFormat
+		);
+		isDarkMode = windowsSettings.value("AppsUseLightTheme") == 0;
+  }
+  else {
+    isDarkMode = darkModeSetting.toBool();
+  }
+  ui->themesLightRadio->setChecked(!isDarkMode);
+  ui->themesDarkRadio->setChecked(isDarkMode);
+}
+
+
 void Preferences::on_saveBtnClicked()
 {
   saveSettings();
@@ -92,6 +113,7 @@ void Preferences::saveSettings()
   settings.setValue("osuirc/password", ui->osuIrcPasswordLineEdit->text());
   settings.setValue("osuirc/server", ui->osuIrcServerLineEdit->text());
   settings.setValue("osuirc/port", ui->osuIrcPortLineEdit->text());
+  settings.setValue("theme/darkMode", ui->themesDarkRadio->isChecked());
 }
 
 

src/preferences/preferences.h

@@ -25,6 +25,7 @@ class Preferences : public QDialog
   void loadTwitchSettings();
   void loadGosuMemorySettings();
   void loadOsuIrcSettings();
+  void loadThemeSettings();
   void setupUi();
   void saveSettings();
   void on_saveBtnClicked();