Implemented sending of typing notifications (#105)

include/TextInputWidget.h

@@ -35,12 +35,20 @@ static const QString JOIN_COMMAND("/join ");
 class FilteredTextEdit : public QTextEdit
 {
         Q_OBJECT
+
+private:
+        QTimer *typingTimer_;
+
 public:
         explicit FilteredTextEdit(QWidget *parent = nullptr);
         void keyPressEvent(QKeyEvent *event);
 
+        void stopTyping();
+
 signals:
         void enterPressed();
+        void startedTyping();
+        void stoppedTyping();
 };
 
 class TextInputWidget : public QFrame
@@ -51,6 +59,8 @@ public:
         TextInputWidget(QWidget *parent = 0);
         ~TextInputWidget();
 
+        void stopTyping();
+
 public slots:
         void onSendButtonClicked();
         void openFileSelection();
@@ -66,6 +76,9 @@ signals:
         void uploadImage(QString filename);
         void sendJoinRoomRequest(const QString &room);
 
+        void startedTyping();
+        void stoppedTyping();
+
 private:
         void showUploadSpinner();
         QString parseEmoteCommand(const QString &cmd);