Receive typing notifications (#88)

include/TypingDisplay.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <QPaintEvent>
+#include <QWidget>
+
+class TypingDisplay : public QWidget
+{
+        Q_OBJECT
+
+public:
+        TypingDisplay(QWidget *parent = nullptr);
+
+        void setUsers(const QStringList &user_ids);
+
+protected:
+        void paintEvent(QPaintEvent *event) override;
+
+private:
+        QString text_;
+        int leftPadding_;
+};