GH-903 simple theme switching and dark theme

application/themes/DarkTheme.cpp

@@ -0,0 +1,37 @@
+#include "DarkTheme.h"
+
+QString DarkTheme::id()
+{
+	return "dark";
+}
+
+QString DarkTheme::name()
+{
+	return QObject::tr("Dark");
+}
+
+QPalette DarkTheme::colorScheme()
+{
+	QPalette darkPalette;
+	darkPalette.setColor(QPalette::Window, QColor(49,54,59));
+	darkPalette.setColor(QPalette::WindowText, Qt::white);
+	darkPalette.setColor(QPalette::Base, QColor(35,38,41));
+	darkPalette.setColor(QPalette::AlternateBase, QColor(49,54,59));
+	darkPalette.setColor(QPalette::ToolTipBase, Qt::white);
+	darkPalette.setColor(QPalette::ToolTipText, Qt::white);
+	darkPalette.setColor(QPalette::Text, Qt::white);
+	darkPalette.setColor(QPalette::Button, QColor(49,54,59));
+	darkPalette.setColor(QPalette::ButtonText, Qt::white);
+	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);
+	return darkPalette;
+}
+
+
+QString DarkTheme::appStyleSheet()
+{
+	return "QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }";
+}

application/themes/DarkTheme.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "ITheme.h"
+
+class DarkTheme: public ITheme
+{
+public:
+	virtual ~DarkTheme() {}
+
+	QString id() override;
+	QString name() override;
+	QString appStyleSheet() override;
+	QPalette colorScheme() override;
+};

application/themes/ITheme.h

@@ -0,0 +1,13 @@
+#pragma once
+#include <QString>
+#include <QPalette>
+
+class ITheme
+{
+public:
+	virtual ~ITheme() {}
+	virtual QString id() = 0;
+	virtual QString name() = 0;
+	virtual QString appStyleSheet() = 0;
+	virtual QPalette colorScheme() = 0;
+};

application/themes/SystemTheme.cpp

@@ -0,0 +1,28 @@
+#include "SystemTheme.h"
+#include <QApplication>
+#include <QStyle>
+
+SystemTheme::SystemTheme()
+{
+	systemPalette = QApplication::style()->standardPalette();
+}
+
+QString SystemTheme::id()
+{
+	return "system";
+}
+
+QString SystemTheme::name()
+{
+	return QObject::tr("System");
+}
+
+QPalette SystemTheme::colorScheme()
+{
+	return systemPalette;
+}
+
+QString SystemTheme::appStyleSheet()
+{
+	return QString();
+}

application/themes/SystemTheme.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "ITheme.h"
+
+class SystemTheme: public ITheme
+{
+public:
+	SystemTheme();
+	virtual ~SystemTheme() {}
+
+	QString id() override;
+	QString name() override;
+	QString appStyleSheet() override;
+	QPalette colorScheme() override;
+private:
+	QPalette systemPalette;
+	QString systemTheme;
+};
+