feat: add backup dialog when opening an existing project

sources/ui/backupdialog.cpp

@@ -0,0 +1,63 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech 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 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "backupdialog.h"
+
+#include <QLabel>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+
+/**
+	@brief BackupDialog::BackupDialog
+	@param parent parent widget
+*/
+BackupDialog::BackupDialog(QWidget *parent) :
+	QDialog(parent)
+{
+	setWindowTitle(tr("Créer une copie de sauvegarde ?", "window title"));
+	setFixedSize(450, 100);
+
+	auto main_layout = new QVBoxLayout(this);
+
+	auto label = new QLabel(
+		tr("Souhaitez-vous créer une copie de sauvegarde ?",
+		   "dialog message"));
+	label->setWordWrap(true);
+	main_layout->addWidget(label);
+
+	main_layout->addStretch();
+
+	auto button_layout = new QHBoxLayout();
+	button_layout->addStretch();
+
+	auto yes_button = new QPushButton(tr("Oui", "yes button"));
+	auto no_button = new QPushButton(tr("Non", "no button"));
+
+	button_layout->addWidget(yes_button);
+	button_layout->addWidget(no_button);
+	main_layout->addLayout(button_layout);
+
+	connect(yes_button, &QPushButton::clicked, this, &QDialog::accept);
+	connect(no_button, &QPushButton::clicked, this, &QDialog::reject);
+}
+
+/**
+	@brief BackupDialog::~BackupDialog
+*/
+BackupDialog::~BackupDialog() = default;