Fix for issue 12351

CHANGELOG.md

@@ -49,6 +49,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - Correct fallback window height (786 → 768) in JabRefGUI. [#14295](https://github.com/JabRef/jabref/pull/14295)
 - We fixed localization of the "New Entries" dialog. [#14455](https://github.com/JabRef/jabref/pull/14455)
 - We fixed an issue where keybindings could not be edited and saved. [#14237](https://github.com/JabRef/jabref/issues/14237)
+- Fixed the entry-table tooltip appearing oversized when preview was enabled. The tooltip now adapts to its content. [#12351](https://github.com/JabRef/jabref/issues/12351)
 
 ### Removed
 

jabgui/src/main/java/org/jabref/gui/maintable/MainTableTooltip.java

@@ -13,7 +13,6 @@
 import org.jabref.model.entry.BibEntry;
 
 public class MainTableTooltip extends Tooltip {
-
     private final PreviewViewer preview;
     private final GuiPreferences preferences;
     private final VBox tooltipContent = new VBox();
@@ -22,15 +21,25 @@ public class MainTableTooltip extends Tooltip {
     public MainTableTooltip(DialogService dialogService, GuiPreferences preferences, ThemeManager themeManager, TaskExecutor taskExecutor) {
         this.preferences = preferences;
         this.preview = new PreviewViewer(dialogService, preferences, themeManager, taskExecutor);
-        this.tooltipContent.getChildren().addAll(fieldValueLabel, preview);
+
+        fieldValueLabel.setWrapText(true);
+        fieldValueLabel.setMaxWidth(450);
+
+        tooltipContent.getChildren().addAll(fieldValueLabel, preview);
+        tooltipContent.setSpacing(5);
+
+        this.setMaxWidth(500);
+        this.setWrapText(true);
     }
 
     public Tooltip createTooltip(BibDatabaseContext databaseContext, BibEntry entry, String fieldValue) {
-        fieldValueLabel.setText(fieldValue + "\n");
+        fieldValueLabel.setText(fieldValue);
+
         if (preferences.getPreviewPreferences().shouldShowPreviewEntryTableTooltip()) {
             preview.setLayout(preferences.getPreviewPreferences().getSelectedPreviewLayout());
             preview.setDatabaseContext(databaseContext);
             preview.setEntry(entry);
+            preview.setMaxHeight(200);
             this.setGraphic(tooltipContent);
         } else {
             this.setGraphic(fieldValueLabel);