From e96bdc1c7e72a613c947c88e70d2916a2f552d59 Mon Sep 17 00:00:00 2001
From: 0xb00bface <0xboobface@gmail.com>
Date: Sat, 14 Nov 2020 19:25:51 +0100
Subject: [PATCH] Adjust mouse scroll speed to height of the scrollpane content

---
 .../FasterVerticalScrollPaneSkin.java         | 31 +++++++++++++++++++
 .../java/ctbrec/ui/tabs/ThumbOverviewTab.java |  3 ++
 2 files changed, 34 insertions(+)
 create mode 100644 client/src/main/java/ctbrec/ui/controls/FasterVerticalScrollPaneSkin.java

diff --git a/client/src/main/java/ctbrec/ui/controls/FasterVerticalScrollPaneSkin.java b/client/src/main/java/ctbrec/ui/controls/FasterVerticalScrollPaneSkin.java
new file mode 100644
index 00000000..fee2f219
--- /dev/null
+++ b/client/src/main/java/ctbrec/ui/controls/FasterVerticalScrollPaneSkin.java
@@ -0,0 +1,31 @@
+package ctbrec.ui.controls;
+
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.skin.ScrollPaneSkin;
+import javafx.scene.input.ScrollEvent;
+
+public class FasterVerticalScrollPaneSkin extends ScrollPaneSkin {
+
+    public FasterVerticalScrollPaneSkin(final ScrollPane scrollPane) {
+        super(scrollPane);
+
+        getSkinnable().addEventFilter(ScrollEvent.SCROLL, event -> {
+            double ratio = scrollPane.getViewportBounds().getHeight() / scrollPane.getContent().getBoundsInLocal().getHeight();
+            double baseUnitIncrement = 0.15;
+            double unitIncrement = baseUnitIncrement * ratio * 1.25;
+            getVerticalScrollBar().setUnitIncrement(unitIncrement);
+
+            if (event.getDeltaX() < 0) {
+                getHorizontalScrollBar().increment();
+            } else if (event.getDeltaX() > 0) {
+                getHorizontalScrollBar().decrement();
+            }
+            if (event.getDeltaY() < 0) {
+                getVerticalScrollBar().increment();
+            } else if (event.getDeltaY() > 0) {
+                getVerticalScrollBar().decrement();
+            }
+            event.consume();
+        });
+    }
+}
diff --git a/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java b/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java
index bdf13d8b..09ceac00 100644
--- a/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java
+++ b/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java
@@ -42,6 +42,7 @@ import ctbrec.ui.action.OpenRecordingsDir;
 import ctbrec.ui.controls.SearchBox;
 import ctbrec.ui.controls.SearchPopover;
 import ctbrec.ui.controls.SearchPopoverTreeList;
+import ctbrec.ui.controls.FasterVerticalScrollPaneSkin;
 import javafx.animation.FadeTransition;
 import javafx.animation.Interpolator;
 import javafx.animation.ParallelTransition;
@@ -196,6 +197,8 @@ public class ThumbOverviewTab extends Tab implements TabSelectionListener {
         scrollPane.setContent(grid);
         scrollPane.setFitToHeight(true);
         scrollPane.setFitToWidth(true);
+        FasterVerticalScrollPaneSkin scrollPaneSkin = new FasterVerticalScrollPaneSkin(scrollPane);
+        scrollPane.setSkin(scrollPaneSkin);
         BorderPane.setMargin(scrollPane, new Insets(5));
 
         pagination = new HBox(5);