ErrorDialog: Use QApplication::activeWindow

src/dialogs/errordialog.cpp

@@ -24,6 +24,7 @@
 #include <utility>
 
 #include <QWidget>
+#include <QApplication>
 #include <QString>
 #include <QIcon>
 #include <QPalette>
@@ -40,9 +41,8 @@
 
 using namespace Qt::Literals::StringLiterals;
 
-ErrorDialog::ErrorDialog(QWidget *mainwindow, QWidget *parent)
+ErrorDialog::ErrorDialog(QWidget *parent)
     : QDialog(parent),
-      mainwindow_(mainwindow),
       ui_(new Ui_ErrorDialog) {
 
   ui_->setupUi(this);
@@ -64,8 +64,9 @@ ErrorDialog::~ErrorDialog() {
 
 void ErrorDialog::ShowDialog() {
 
-  if (screen() && mainwindow_->screen() && screen() != mainwindow_->screen()) {
-    Utilities::CenterWidgetOnScreen(mainwindow_->screen(), this);
+  QWidget *active_window = QApplication::activeWindow();
+  if (active_window && screen() && active_window->screen() && screen() != active_window->screen()) {
+    Utilities::CenterWidgetOnScreen(active_window->screen(), this);
   }
   setWindowState((windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
   show();
@@ -81,7 +82,7 @@ void ErrorDialog::ShowMessage(const QString &message) {
   current_messages_ << message;
   UpdateContent();
 
-  if (mainwindow_->isActiveWindow()) {
+  if (QApplication::activeWindow()) {
     ShowDialog();
   }
   else if (!isVisible()) {

src/dialogs/errordialog.h

@@ -37,7 +37,7 @@ class ErrorDialog : public QDialog {
   Q_OBJECT
 
  public:
-  explicit ErrorDialog(QWidget *mainwindow, QWidget *parent = nullptr);
+  explicit ErrorDialog(QWidget *parent = nullptr);
   ~ErrorDialog() override;
 
  public Q_SLOTS:
@@ -50,7 +50,6 @@ class ErrorDialog : public QDialog {
  private:
   void UpdateContent();
 
-  QWidget *mainwindow_;
   Ui_ErrorDialog *ui_;
 
   QStringList current_messages_;