Show confirmation dialog on logout

Minor stylistic refactoring

closes #29

include/LogoutDialog.h

@@ -0,0 +1,36 @@
+/*
+ * nheko Copyright (C) 2017  Konstantinos Sideris <siderisk@auth.gr>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QFrame>
+
+#include "FlatButton.h"
+
+class LogoutDialog : public QFrame
+{
+	Q_OBJECT
+public:
+	explicit LogoutDialog(QWidget *parent = nullptr);
+
+signals:
+	void closing(bool isLoggingOut);
+
+private:
+	FlatButton *confirmBtn_;
+	FlatButton *cancelBtn_;
+};

include/MainWindow.h

@@ -38,6 +38,8 @@ public:
 	explicit MainWindow(QWidget *parent = 0);
 	~MainWindow();
 
+	static MainWindow *instance();
+
 protected:
 	void closeEvent(QCloseEvent *event);
 
@@ -62,6 +64,8 @@ private slots:
 private:
 	bool hasActiveUser();
 
+	static MainWindow *instance_;
+
 	// The initial welcome screen.
 	WelcomePage *welcome_page_;
 

include/UserInfoWidget.h

@@ -24,6 +24,8 @@
 
 #include "Avatar.h"
 #include "FlatButton.h"
+#include "LogoutDialog.h"
+#include "OverlayModal.h"
 
 class UserInfoWidget : public QWidget
 {
@@ -45,6 +47,9 @@ signals:
 protected:
 	void resizeEvent(QResizeEvent *event) override;
 
+private slots:
+	void closeLogoutDialog(bool isLoggingOut);
+
 private:
 	Avatar *userAvatar_;
 
@@ -62,4 +67,9 @@ private:
 	QString user_id_;
 
 	QImage avatar_image_;
+
+	OverlayModal *logoutModal_;
+	LogoutDialog *logoutDialog_;
+
+	int logoutButtonSize_;
 };