Bring back the scrollbars

CHANGELOG.md

@@ -28,6 +28,7 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 - We fixed an exception which occurred when closing JabRef. [#5348](https://github.com/JabRef/jabref/issues/5348)
 - We fixed a few problems that prevented JabFox to communicate with JabRef. [#4737](https://github.com/JabRef/jabref/issues/4737) [#4303](https://github.com/JabRef/jabref/issues/4303)
 - We fixed an error where the groups containing an entry loose their highlight color when scrolling. [#5022](https://github.com/JabRef/jabref/issues/5022) 
+- We fixed an error where scrollbars were not shown. [#5374](https://github.com/JabRef/jabref/issues/5374)
 - We fixed an error where an exception was thrown when merging entries. [#5169](https://github.com/JabRef/jabref/issues/5169)
 - After assigning an entry to a group, the item count is now properly colored to reflect the new membership of the entry. [#3112](https://github.com/JabRef/jabref/issues/3112)
 - The group panel is now properly updated when switching between libraries (or when closing/opening one). [#3142](https://github.com/JabRef/jabref/issues/3142)

src/main/java/org/jabref/gui/Base.css

@@ -87,8 +87,8 @@
     -jr-sidepane-header-color: -jr-theme-text;
 
     /* Specs for the scrollbars */
-    -jr-scrollbar-thumb: -fx-outer-border;
-    -jr-scrollbar-track: -fx-control-inner-background;
+    -jr-scrollbar-thumb: derive(-fx-outer-border, -30%);
+    -jr-scrollbar-track: derive(-fx-control-inner-background, -10%);
 
     -jr-separator: derive(-fx-color, -5%);
 
@@ -698,13 +698,13 @@
 
 .scroll-bar {
     -fx-background-color: transparent;
-    -fx-opacity: 0;
+    -fx-opacity: 0.3;
 }
 
 .scroll-bar:horizontal .track,
 .scroll-bar:vertical .track {
     -fx-background-color: -jr-scrollbar-track;
-    -fx-opacity: 0.2;
+    -fx-opacity: 0.6;
     -fx-background-radius: 0em;
 }
 
@@ -718,7 +718,7 @@
 
 .scroll-bar .thumb:hover,
 .scroll-bar .thumb:pressed {
-    -fx-background-color: derive(-jr-scrollbar-thumb, -20%);
+    -fx-background-color: derive(-jr-scrollbar-thumb, -30%);
 }
 
 /* Hide increment and decrement buttons */
@@ -751,7 +751,7 @@
     -fx-padding: 0em 0.333em 0em 0.333em; /* 2 4 2 4 */
 }
 
-/* Only show scrollbars for hovered elements */
+/* Restore full visibility of scrollbars for active elements */
 .list-view:hover .scroll-bar,
 .tree-view:hover .scroll-bar,
 .table-view:hover .scroll-bar,

src/main/java/org/jabref/gui/BasePanel.java

@@ -20,7 +20,6 @@
 import javafx.beans.binding.Bindings;
 import javafx.geometry.Orientation;
 import javafx.scene.Node;
-import javafx.scene.control.ScrollPane;
 import javafx.scene.control.SplitPane;
 import javafx.scene.layout.StackPane;
 
@@ -745,10 +744,7 @@ public void setupMainPanel() {
 
         createMainTable();
 
-        ScrollPane pane = mainTable.getPane();
-        pane.setFitToHeight(true);
-        pane.setFitToWidth(true);
-        splitPane.getItems().add(pane);
+        splitPane.getItems().add(mainTable);
 
         // Set up name autocompleter for search:
         setupAutoCompletion();

src/main/java/org/jabref/gui/maintable/MainTable.java

@@ -11,7 +11,6 @@
 import javax.swing.undo.UndoManager;
 
 import javafx.collections.ListChangeListener;
-import javafx.scene.control.ScrollPane;
 import javafx.scene.control.SelectionMode;
 import javafx.scene.control.TableRow;
 import javafx.scene.control.TableView;
@@ -56,7 +55,6 @@ public class MainTable extends TableView<BibEntryTableViewModel> {
 
     private final BasePanel panel;
 
-    private final ScrollPane pane;
     private final BibDatabaseContext database;
     private final UndoManager undoManager;
 
@@ -118,11 +116,7 @@ public MainTable(MainTableDataModel model, JabRefFrame frame,
 
         this.panel = panel;
 
-        pane = new ScrollPane(this);
-        pane.setFitToHeight(true);
-        pane.setFitToWidth(true);
-
-        this.pane.getStylesheets().add(MainTable.class.getResource("MainTable.css").toExternalForm());
+        this.getStylesheets().add(MainTable.class.getResource("MainTable.css").toExternalForm());
 
         // Store visual state
         new PersistenceVisualStateTable(this, Globals.prefs);
@@ -335,10 +329,6 @@ public void addSelectionListener(ListChangeListener<? super BibEntryTableViewMod
         getSelectionModel().getSelectedItems().addListener(listener);
     }
 
-    public ScrollPane getPane() {
-        return pane;
-    }
-
     public MainTableDataModel getTableModel() {
         return model;
     }

src/main/java/org/jabref/gui/maintable/SmartConstrainedResizePolicy.java

@@ -42,6 +42,10 @@ private Boolean initColumnSize(TableView<?> table) {
                 for (TableColumnBase col : visibleLeafColumns) {
                     double share = col.getPrefWidth() / totalPrefWidth;
                     double newSize = tableWidth * share;
+
+                    // Just to make sure that we are staying under the total table width (due to rounding errors)
+                    newSize -= 2;
+
                     resize(col, newSize - col.getWidth());
                 }
             }
@@ -68,7 +72,7 @@ private Boolean constrainedResize(TableView.ResizeFeatures<?> prop) {
         List<? extends TableColumnBase<?, ?>> visibleLeafColumns = table.getVisibleLeafColumns();
         return constrainedResize(prop,
                 false,
-                getContentWidth(table),
+                getContentWidth(table) - 2,
                 visibleLeafColumns);
     }