[Qt] Implements "Previews"

src/burner/qt/selectdialog.cpp

@@ -78,6 +78,7 @@ void SelectDialog::driverChange(QTreeWidgetItem *item, QTreeWidgetItem *prev)
     nBurnDrvActive = driver->driverNo();
     ui->leGameInfo->setText(BurnDrvGetText(flags | DRV_FULLNAME));
     updateTitleScreen();
+    updatePreview();
     {
         QString manufacturer = BurnDrvGetTextA(DRV_MANUFACTURER) ?
                     BurnDrvGetText(flags | DRV_MANUFACTURER) : tr("Unknown");
@@ -192,6 +193,19 @@ void SelectDialog::updateTitleScreen()
     }
 }
 
+void SelectDialog::updatePreview()
+{
+    QString drv = BurnDrvGetTextA(DRV_NAME);
+    QString path = QString(szAppPreviewsPath);
+    path += QString("%0.png").arg(drv);
+    if (QFile(path).exists()) {
+        QPixmap p(path);
+        ui->imgPreview->setPixmap(p);
+    } else {
+        ui->imgPreview->setPixmap(m_defaultImage);
+    }
+}
+
 void SelectDialog::updateLabelCounter()
 {
     QString text(tr("Showing %0 of %1 sets").

src/burner/qt/selectdialog.h

@@ -66,6 +66,8 @@ signals:
 private:
     int m_selectedDriver;
     void updateTitleScreen();
+    void updatePreview();
+
     void updateLabelCounter();
     void buildDriverTree();
     bool isFiltered(TreeDriverItem *driver);