Fix #4720: 修复 JFXListViewSkin 创建大量平台线程的问题 (#4721)

Author: Glavo

HMCL/src/main/java/com/jfoenix/skins/JFXListViewSkin.java

@@ -0,0 +1,91 @@
+// Copy from https://github.com/sshahine/JFoenix/blob/d427fd801a338f934307ba41ce604eb5c79f0b20/jfoenix/src/main/java/com/jfoenix/skins/JFXListViewSkin.java
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package com.jfoenix.skins;
+
+import com.jfoenix.adapters.skins.ListViewSkin;
+import com.jfoenix.controls.JFXListView;
+import com.jfoenix.effects.JFXDepthManager;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.skin.VirtualFlow;
+import javafx.scene.layout.Region;
+
+// https://github.com/HMCL-dev/HMCL/issues/4720
+public class JFXListViewSkin<T> extends ListViewSkin<T> {
+
+    private final VirtualFlow<ListCell<T>> flow;
+
+    @SuppressWarnings("unchecked")
+    public JFXListViewSkin(final JFXListView<T> listView) {
+        super(listView);
+        flow = (VirtualFlow<ListCell<T>>) getChildren().get(0);
+        JFXDepthManager.setDepth(flow, listView.depthProperty().get());
+        listView.depthProperty().addListener((o, oldVal, newVal) -> JFXDepthManager.setDepth(flow, newVal));
+    }
+
+    @Override
+    protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
+        return 200;
+    }
+
+    @Override
+    protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
+        final int itemsCount = getSkinnable().getItems().size();
+        if (getSkinnable().maxHeightProperty().isBound() || itemsCount <= 0) {
+            return super.computePrefHeight(width, topInset, rightInset, bottomInset, leftInset);
+        }
+
+        final double fixedCellSize = getSkinnable().getFixedCellSize();
+        double computedHeight = fixedCellSize != Region.USE_COMPUTED_SIZE ?
+                fixedCellSize * itemsCount + snapVerticalInsets() : estimateHeight();
+        double height = super.computePrefHeight(width, topInset, rightInset, bottomInset, leftInset);
+        if (height > computedHeight) {
+            height = computedHeight;
+        }
+
+        if (getSkinnable().getMaxHeight() > 0 && computedHeight > getSkinnable().getMaxHeight()) {
+            return getSkinnable().getMaxHeight();
+        }
+
+        return height;
+    }
+
+    private double estimateHeight() {
+        // compute the border/padding for the list
+        double borderWidth = snapVerticalInsets();
+        // compute the gap between list cells
+
+        JFXListView<T> listview = (JFXListView<T>) getSkinnable();
+        double gap = listview.isExpanded() ? ((JFXListView<T>) getSkinnable()).getVerticalGap() * (getSkinnable().getItems()
+                .size()) : 0;
+        // compute the height of each list cell
+        double cellsHeight = 0;
+        for (int i = 0; i < flow.getCellCount(); i++) {
+            ListCell<T> cell = flow.getCell(i);
+            cellsHeight += cell.getHeight();
+        }
+        return cellsHeight + gap + borderWidth;
+    }
+
+    private double snapVerticalInsets() {
+        return getSkinnable().snappedBottomInset() + getSkinnable().snappedTopInset();
+    }
+
+}