Do not allow closing ScanProgressDialog

BUG: 393275

src/gui/scanprogressdialog.cpp

@@ -18,6 +18,8 @@
 
 #include "gui/scanprogressdialog.h"
 
+#include <QCloseEvent>
+
 #include <KLocalizedString>
 
 ScanProgressDialog::ScanProgressDialog(QWidget* parent) :
@@ -30,6 +32,11 @@ ScanProgressDialog::ScanProgressDialog(QWidget* parent) :
     setAttribute(Qt::WA_ShowModal, true);
 }
 
+void ScanProgressDialog::closeEvent(QCloseEvent* e)
+{
+    e->ignore();
+}
+
 void ScanProgressDialog::setDeviceName(const QString& d)
 {
     if (d.isEmpty())
@@ -40,7 +47,7 @@ void ScanProgressDialog::setDeviceName(const QString& d)
 
 void ScanProgressDialog::showEvent(QShowEvent* e)
 {
-    setCancelButton(0);
+    setCancelButton(nullptr);
 
     QProgressDialog::showEvent(e);
 }

src/gui/scanprogressdialog.h

@@ -15,8 +15,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.*
  *************************************************************************/
 
-#if !defined(SCANPROGRESSDIALOG_H)
-
+#ifndef SCANPROGRESSDIALOG_H
 #define SCANPROGRESSDIALOG_H
 
 #include <QProgressDialog>
@@ -34,6 +33,7 @@ public:
     void setDeviceName(const QString& d);
 
 protected:
+    void closeEvent(QCloseEvent* e) override;
     void showEvent(QShowEvent* e) override;
 
 };