Changed the donation reminder to be non-modal

I've coded this nice non-modal popup for asking whether to enable crash
reporting, so might as well use it for asking for donations as well.

.LICENSE-HEADER

@@ -1,6 +1,6 @@
 /*
  * %FILENAME%
- * Copyright 2019, Your Name <your.name@domain>
+ * Copyright 2021, Your Name <your.name@domain>
  *
  * This file is part of Tiled.
  *

src/tiled/donationpopup.cpp

@@ -0,0 +1,91 @@
+/*
+ * donationpopup.cpp
+ * Copyright 2015-2021, Thorbjørn Lindeijer <[email protected]>
+ *
+ * This file is part of Tiled.
+ *
+ * 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 2 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/>.
+ */
+
+#include "donationpopup.h"
+
+#include "preferences.h"
+#include "utils.h"
+
+#include <QCoreApplication>
+#include <QDesktopServices>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QMenu>
+#include <QMessageBox>
+#include <QPushButton>
+#include <QUrl>
+
+using namespace Tiled;
+
+DonationPopup::DonationPopup(QWidget *parent)
+    : PopupWidget(parent)
+{
+    auto label = new QLabel(QCoreApplication::translate("DonationDialog", "Please consider supporting Tiled development with a small monthly donation."));
+
+    auto visitDonatePage = new QPushButton(QCoreApplication::translate("DonationDialog", "&Donate ↗"));
+    auto alreadyDonating = new QPushButton(QCoreApplication::translate("DonationDialog", "I'm a &supporter!"));
+    auto maybeLaterButton = new QPushButton(QCoreApplication::translate("DonationDialog", "&Maybe later"));
+
+    const QDate today(QDate::currentDate());
+    auto laterMenu = new QMenu(this);
+    laterMenu->addAction(QCoreApplication::translate("Tiled::DonationDialog", "Remind me next week"))->setData(today.addDays(7));
+    laterMenu->addAction(QCoreApplication::translate("Tiled::DonationDialog", "Remind me next month"))->setData(today.addMonths(1));
+    laterMenu->addAction(QCoreApplication::translate("Tiled::DonationDialog", "Don't remind me"))->setData(QDate());
+    maybeLaterButton->setMenu(laterMenu);
+
+    auto layout = new QHBoxLayout;
+    layout->addWidget(label);
+    layout->addSpacing(Utils::dpiScaled(10));
+    layout->addWidget(visitDonatePage);
+    layout->addWidget(alreadyDonating);
+    layout->addWidget(maybeLaterButton);
+    const auto margin = Utils::dpiScaled(5);
+    layout->setContentsMargins(margin * 2, margin, margin, margin);
+    setLayout(layout);
+
+    connect(visitDonatePage, &QPushButton::clicked, this, &DonationPopup::openDonationPage);
+    connect(alreadyDonating, &QPushButton::clicked, this, &DonationPopup::sayThanks);
+    connect(laterMenu, &QMenu::triggered, this, &DonationPopup::maybeLater);
+}
+
+void DonationPopup::openDonationPage()
+{
+    QDesktopServices::openUrl(QUrl(QLatin1String("https://www.mapeditor.org/donate")));
+}
+
+void DonationPopup::sayThanks()
+{
+    Preferences::instance()->setPatron(true);
+
+    QMessageBox(QMessageBox::NoIcon, QCoreApplication::translate("Tiled::DonationDialog", "Thanks!"),
+                QCoreApplication::translate("Tiled::DonationDialog", "Thanks a lot for your support! With your help Tiled will keep getting better."),
+                QMessageBox::Close, this).exec();
+
+    close();
+}
+
+void DonationPopup::maybeLater(QAction *action)
+{
+    const QDate date = action->data().toDate();
+    Preferences::instance()->setDonationReminder(date);
+    close();
+}
+
+#include "moc_donationpopup.cpp"

src/tiled/donationdialog.h → src/tiled/donationpopup.h

@@ -1,6 +1,6 @@
 /*
- * donationdialog.h
- * Copyright 2015-2019, Thorbjørn Lindeijer <[email protected]>
+ * donationpopup.h
+ * Copyright 2015-2021, Thorbjørn Lindeijer <[email protected]>
  *
  * This file is part of Tiled.
  *
@@ -20,28 +20,21 @@
 
 #pragma once
 
-#include <QDialog>
-
-namespace Ui {
-class DonationDialog;
-}
+#include "popupwidget.h"
 
 namespace Tiled {
 
-class DonationDialog : public QDialog
+class DonationPopup : public PopupWidget
 {
     Q_OBJECT
 
 public:
-    explicit DonationDialog(QWidget *parent = nullptr);
-    ~DonationDialog();
+    explicit DonationPopup(QWidget *parent = nullptr);
 
 private:
     void openDonationPage();
     void sayThanks();
     void maybeLater(QAction *action);
-
-    Ui::DonationDialog *ui;
 };
 
 } // namespace Tiled

src/tiled/filechangedwarning.h

@@ -32,7 +32,7 @@ class FileChangedWarning : public QWidget
     Q_OBJECT
 
 public:
-    FileChangedWarning(QWidget *parent = nullptr);
+    explicit FileChangedWarning(QWidget *parent = nullptr);
 
 signals:
     void reload();