From 13f618818dc57673ac0287ad8b28ceb450efb374 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Mon, 7 Jun 2021 18:00:36 +0300
Subject: [PATCH] qt: Add GUIUtil::ShowModalDialogAndDeleteOnClose

---
 src/qt/guiutil.cpp | 8 ++++++++
 src/qt/guiutil.h   | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index e98e50ba148..bbd33f1de0f 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -36,6 +36,7 @@
 #include <QClipboard>
 #include <QDateTime>
 #include <QDesktopServices>
+#include <QDialog>
 #include <QDoubleValidator>
 #include <QFileDialog>
 #include <QFont>
@@ -958,4 +959,11 @@ void PrintSlotException(
     PrintExceptionContinue(exception, description.c_str());
 }
 
+void ShowModalDialogAndDeleteOnClose(QDialog* dialog)
+{
+    dialog->setAttribute(Qt::WA_DeleteOnClose);
+    dialog->setWindowModality(Qt::ApplicationModal);
+    dialog->show();
+}
+
 } // namespace GUIUtil
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 06a3b636686..274f0bdcbfd 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -41,6 +41,7 @@ class QAbstractButton;
 class QAbstractItemView;
 class QAction;
 class QDateTime;
+class QDialog;
 class QFont;
 class QKeySequence;
 class QLineEdit;
@@ -417,6 +418,11 @@ namespace GUIUtil
             type);
     }
 
+    /**
+     * Shows a QDialog instance asynchronously, and deletes it on close.
+     */
+    void ShowModalDialogAndDeleteOnClose(QDialog* dialog);
+
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H