Show torrent name in "preview file" related dialogs

src/gui/previewselectdialog.cpp

@@ -54,6 +54,9 @@ PreviewSelectDialog::PreviewSelectDialog(QWidget *parent, const BitTorrent::Torr
 {
     m_ui->setupUi(this);
 
+    m_ui->label->setText(tr("The following files from torrent \"%1\" support previewing, please select one of them:")
+        .arg(m_torrent->name()));
+
     m_ui->buttonBox->button(QDialogButtonBox::Ok)->setText(tr("Preview"));
     connect(m_ui->buttonBox, &QDialogButtonBox::accepted, this, &PreviewSelectDialog::previewButtonClicked);
     connect(m_ui->buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
@@ -125,7 +128,8 @@ void PreviewSelectDialog::previewButtonClicked()
     if (!QFile::exists(path)) {
         const bool isSingleFile = (m_previewListModel->rowCount() == 1);
         QWidget *parent = isSingleFile ? this->parentWidget() : this;
-        QMessageBox::critical(parent, tr("Preview impossible"), tr("Sorry, we can't preview this file"));
+        QMessageBox::critical(parent, tr("Preview impossible")
+            , tr("Sorry, we can't preview this file: \"%1\".").arg(Utils::Fs::toNativePath(path)));
         if (isSingleFile)
             reject();
         return;

src/gui/previewselectdialog.ui

@@ -16,9 +16,6 @@
   <layout class="QVBoxLayout">
    <item>
     <widget class="QLabel" name="label">
-     <property name="text">
-      <string>The following files support previewing, please select one of them:</string>
-     </property>
      <property name="wordWrap">
       <bool>true</bool>
      </property>

src/gui/transferlistwidget.cpp

@@ -509,7 +509,8 @@ void TransferListWidget::previewSelectedTorrents()
             dialog->show();
         }
         else {
-            QMessageBox::critical(this, tr("Unable to preview"), tr("The selected torrent does not contain previewable files"));
+            QMessageBox::critical(this, tr("Unable to preview"), tr("The selected torrent \"%1\" does not contain previewable files")
+                .arg(torrent->name()));
         }
     }
 }