Add basic color scheme handling

Fix #59

src/widgets/basewidget.cpp

@@ -0,0 +1,39 @@
+#include "widgets/basewidget.hpp"
+#include "colorscheme.hpp"
+
+#include <QDebug>
+#include <boost/signals2.hpp>
+
+namespace chatterino {
+namespace widgets {
+
+BaseWidget::BaseWidget(ColorScheme &_colorScheme, QWidget *parent)
+    : QWidget(parent)
+    , colorScheme(_colorScheme)
+{
+    this->init();
+}
+
+BaseWidget::BaseWidget(BaseWidget *parent)
+    : QWidget(parent)
+    , colorScheme(parent->colorScheme)
+{
+    this->init();
+}
+
+void BaseWidget::init()
+{
+    this->colorScheme.updated.connect([this]() {
+        this->refreshTheme();
+
+        this->update();
+    });
+}
+
+void BaseWidget::refreshTheme()
+{
+    // Do any color scheme updates here
+}
+
+}  // namespace widgets
+}  // namespace chatterino