added generic method to save state of dialogs

src/librssguard/gui/dialogs/formbackupdatabasesettings.cpp

@@ -15,6 +15,9 @@
 
 FormBackupDatabaseSettings::FormBackupDatabaseSettings(QWidget* parent) : QDialog(parent), m_ui(new Ui::FormBackupDatabaseSettings) {
   m_ui->setupUi(this);
+
+  setObjectName(QSL("form_backup_db_set"));
+
   m_ui->m_txtBackupName->lineEdit()->setPlaceholderText(tr("Common name for backup files"));
 
   GuiUtilities::applyDialogProperties(*this, qApp->icons()->fromTheme(QSL("document-export")));
@@ -33,6 +36,9 @@ FormBackupDatabaseSettings::FormBackupDatabaseSettings(QWidget* parent) : QDialo
   if (qApp->database()->activeDatabaseDriver() != DatabaseDriver::DriverType::SQLite) {
     m_ui->m_checkBackupDatabase->setDisabled(true);
   }
+
+  GuiUtilities::restoreState(this,
+                             qApp->settings()->value(GROUP(GUI), objectName(), QByteArray()).toByteArray());
 }
 
 FormBackupDatabaseSettings::~FormBackupDatabaseSettings() {
@@ -82,3 +88,10 @@ void FormBackupDatabaseSettings::checkOkButton() {
                                                                                (!m_ui->m_checkBackupDatabase->isChecked() &&
                                                                                 !m_ui->m_checkBackupSettings->isChecked()));
 }
+
+void FormBackupDatabaseSettings::hideEvent(QHideEvent* event) {
+  QByteArray state = GuiUtilities::saveState(this);
+
+  qApp->settings()->setValue(GROUP(GUI), objectName(), state);
+  QDialog::hideEvent(event);
+}

src/librssguard/gui/dialogs/formbackupdatabasesettings.h

@@ -14,6 +14,9 @@ class FormBackupDatabaseSettings : public QDialog {
     explicit FormBackupDatabaseSettings(QWidget* parent = nullptr);
     virtual ~FormBackupDatabaseSettings();
 
+  protected:
+    virtual void hideEvent(QHideEvent* event);
+
   private slots:
     void performBackup();
     void selectFolderInitial();

src/librssguard/gui/dialogs/formdatabasecleanup.cpp

@@ -3,6 +3,7 @@
 #include "gui/dialogs/formdatabasecleanup.h"
 
 #include "database/databasefactory.h"
+#include "definitions/definitions.h"
 #include "gui/guiutilities.h"
 #include "miscellaneous/application.h"
 #include "miscellaneous/iconfactory.h"
@@ -14,6 +15,8 @@
 FormDatabaseCleanup::FormDatabaseCleanup(QWidget* parent) : QDialog(parent), m_ui(new Ui::FormDatabaseCleanup), m_cleaner(nullptr) {
   m_ui->setupUi(this);
 
+  setObjectName(QSL("form_db_cleanup"));
+
   GuiUtilities::applyDialogProperties(*this, qApp->icons()->fromTheme(QSL("edit-clear")));
 
   connect(m_ui->m_spinDays, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &FormDatabaseCleanup::updateDaysSuffix);
@@ -27,6 +30,9 @@ FormDatabaseCleanup::FormDatabaseCleanup(QWidget* parent) : QDialog(parent), m_u
   m_ui->m_lblResult->setStatus(WidgetWithStatus::StatusType::Information, tr("I am ready."), tr("I am ready."));
 
   loadDatabaseInfo();
+
+  GuiUtilities::restoreState(this,
+                             qApp->settings()->value(GROUP(GUI), objectName(), QByteArray()).toByteArray());
 }
 
 void FormDatabaseCleanup::closeEvent(QCloseEvent* event) {
@@ -99,3 +105,10 @@ void FormDatabaseCleanup::loadDatabaseInfo() {
   m_ui->m_txtFileSize->setText(data_size_str);
   m_ui->m_txtDatabaseType->setText(qApp->database()->driver()->humanDriverType());
 }
+
+void FormDatabaseCleanup::hideEvent(QHideEvent* event) {
+  QByteArray state = GuiUtilities::saveState(this);
+
+  qApp->settings()->setValue(GROUP(GUI), objectName(), state);
+  QDialog::hideEvent(event);
+}

src/librssguard/gui/dialogs/formdatabasecleanup.h

@@ -17,8 +17,9 @@ class FormDatabaseCleanup : public QDialog {
     virtual ~FormDatabaseCleanup() = default;
 
   protected:
-    void closeEvent(QCloseEvent* event);
-    void keyPressEvent(QKeyEvent* event);
+    virtual void closeEvent(QCloseEvent* event);
+    virtual void hideEvent(QHideEvent* event);
+    virtual void keyPressEvent(QKeyEvent* event);
 
   private slots:
     void updateDaysSuffix(int number);

src/librssguard/gui/guiutilities.cpp

@@ -4,6 +4,8 @@
 
 #include "definitions/definitions.h"
 
+#include <QSettings>
+
 #if defined(Q_OS_ANDROID)
 #include <QApplication>
 #include <QDesktopWidget>
@@ -50,3 +52,63 @@ void GuiUtilities::applyResponsiveDialogResize(QWidget& widget, double factor) {
   Q_UNUSED(widget)
 #endif
 }
+
+void GuiUtilities::restoreState(QWidget* wdg, QByteArray state) {
+  QHash<QString, QStringList> props_to_serialize {
+    { QSL("QCheckBox"), { QSL("checked") } },
+    { QSL("QSpinBox"), { QSL("value") } }
+  };
+  QHash<QString, QHash<QString, QVariant>> props;
+  QDataStream str(&state, QIODevice::OpenModeFlag::ReadOnly);
+
+  str >> props;
+
+  QList<QObject*> to_process = { wdg };
+
+  while (!to_process.isEmpty()) {
+    QObject* act = to_process.takeFirst();
+
+    if (props.contains(act->objectName())) {
+      auto saved_props = props.value(act->objectName());
+      auto saved_props_names = saved_props.keys();
+
+      for (const QString& saved_key : saved_props_names) {
+        act->setProperty(saved_key.toLocal8Bit().constData(), saved_props.value(saved_key));
+      }
+    }
+
+    to_process.append(act->children());
+  }
+}
+
+QByteArray GuiUtilities::saveState(QWidget* wdg) {
+  QHash<QString, QStringList> props_to_serialize {
+    { QSL("QCheckBox"), { QSL("checked") } },
+    { QSL("QSpinBox"), { QSL("value") } }
+  };
+  QHash<QString, QHash<QString, QVariant>> props;
+  QList<QObject*> to_process = { wdg };
+
+  while (!to_process.isEmpty()) {
+    QObject* act = to_process.takeFirst();
+    const QMetaObject* meta = act->metaObject();
+    auto act_props = props_to_serialize.value(meta->className());
+    QHash<QString, QVariant> props_obj;
+
+    for (const QString& prop : act_props) {
+      props_obj.insert(prop, act->property(prop.toLocal8Bit().constData()));
+    }
+
+    if (!props_obj.isEmpty()) {
+      props.insert(act->objectName(), props_obj);
+    }
+
+    to_process.append(act->children());
+  }
+
+  QByteArray arr;
+  QDataStream str(&arr, QIODevice::OpenModeFlag::WriteOnly);
+
+  str << props;
+  return arr;
+}

src/librssguard/gui/guiutilities.h

@@ -12,6 +12,8 @@ class GuiUtilities {
     static void setLabelAsNotice(QLabel& label, bool is_warning, bool set_margins = true);
     static void applyDialogProperties(QWidget& widget, const QIcon& icon = QIcon(), const QString& title = QString());
     static void applyResponsiveDialogResize(QWidget& widget, double factor = 0.6);
+    static void restoreState(QWidget* wdg, QByteArray state);
+    static QByteArray saveState(QWidget* wdg);
 
   private:
     explicit GuiUtilities();