qt, wallet: Move activity progress dialog from data member to local

Author: hebasto

src/qt/walletcontroller.cpp

@@ -193,31 +193,20 @@ WalletControllerActivity::WalletControllerActivity(WalletController* wallet_cont
 {
 }
 
-WalletControllerActivity::~WalletControllerActivity()
-{
-    delete m_progress_dialog;
-}
-
 void WalletControllerActivity::showProgressDialog(const QString& label_text)
 {
-    assert(!m_progress_dialog);
-    m_progress_dialog = new QProgressDialog(m_parent_widget);
-
-    m_progress_dialog->setLabelText(label_text);
-    m_progress_dialog->setRange(0, 0);
-    m_progress_dialog->setCancelButton(nullptr);
-    m_progress_dialog->setWindowModality(Qt::ApplicationModal);
-    GUIUtil::PolishProgressDialog(m_progress_dialog);
+    auto progress_dialog = new QProgressDialog(m_parent_widget);
+    progress_dialog->setAttribute(Qt::WA_DeleteOnClose);
+    connect(this, &WalletControllerActivity::finished, progress_dialog, &QWidget::close);
+
+    progress_dialog->setLabelText(label_text);
+    progress_dialog->setRange(0, 0);
+    progress_dialog->setCancelButton(nullptr);
+    progress_dialog->setWindowModality(Qt::ApplicationModal);
+    GUIUtil::PolishProgressDialog(progress_dialog);
     // The setValue call forces QProgressDialog to start the internal duration estimation.
     // See details in https://bugreports.qt.io/browse/QTBUG-47042.
-    m_progress_dialog->setValue(0);
-}
-
-void WalletControllerActivity::destroyProgressDialog()
-{
-    assert(m_progress_dialog);
-    delete m_progress_dialog;
-    m_progress_dialog = nullptr;
+    progress_dialog->setValue(0);
 }
 
 CreateWalletActivity::CreateWalletActivity(WalletController* wallet_controller, QWidget* parent_widget)
@@ -279,8 +268,6 @@ void CreateWalletActivity::createWallet()
 
 void CreateWalletActivity::finish()
 {
-    destroyProgressDialog();
-
     if (!m_error_message.empty()) {
         QMessageBox::critical(m_parent_widget, tr("Create wallet failed"), QString::fromStdString(m_error_message.translated));
     } else if (!m_warning_message.empty()) {
@@ -329,8 +316,6 @@ OpenWalletActivity::OpenWalletActivity(WalletController* wallet_controller, QWid
 
 void OpenWalletActivity::finish()
 {
-    destroyProgressDialog();
-
     if (!m_error_message.empty()) {
         QMessageBox::critical(m_parent_widget, tr("Open wallet failed"), QString::fromStdString(m_error_message.translated));
     } else if (!m_warning_message.empty()) {

src/qt/walletcontroller.h

@@ -90,7 +90,7 @@ class WalletControllerActivity : public QObject
 
 public:
     WalletControllerActivity(WalletController* wallet_controller, QWidget* parent_widget);
-    virtual ~WalletControllerActivity();
+    virtual ~WalletControllerActivity() = default;
 
 Q_SIGNALS:
     void finished();
@@ -100,11 +100,9 @@ class WalletControllerActivity : public QObject
     QObject* worker() const { return m_wallet_controller->m_activity_worker; }
 
     void showProgressDialog(const QString& label_text);
-    void destroyProgressDialog();
 
     WalletController* const m_wallet_controller;
     QWidget* const m_parent_widget;
-    QProgressDialog* m_progress_dialog{nullptr};
     WalletModel* m_wallet_model{nullptr};
     bilingual_str m_error_message;
     std::vector<bilingual_str> m_warning_message;