Initial project

src/main/java/com/imyeyu/fx/ui/components/ContextMenu.java

@@ -0,0 +1,63 @@
+package com.imyeyu.fx.ui.components;
+
+import javafx.collections.ListChangeListener;
+import javafx.collections.ObservableList;
+import javafx.scene.control.Menu;
+import javafx.scene.control.MenuItem;
+
+import java.util.List;
+
+/**
+ * 支持最小尺寸的菜单，默认 90
+ *
+ * @author 夜雨
+ * @since 2023-03-10 11:14
+ */
+public class ContextMenu extends javafx.scene.control.ContextMenu {
+
+	/** 当菜单项 {@link Menu#getProperties()} 携带此标记时，该菜单不继承最小宽度属性 */
+	public static final String NOT_EXTENDS_FLAG = "NOT_EXTENDS_FLAG";
+
+	private static final String STYLE_TEMPLATE = "-fx-min-width: %s; -fx-pref-width: %s";
+
+	/**
+	 * 标准构造
+	 *
+	 * @param items   菜单项
+	 */
+	public ContextMenu(MenuItem... items) {
+		super(items);
+
+		getItems().addListener((ListChangeListener<MenuItem>) c -> {
+			while (c.next()) {
+				if (c.wasAdded()) {
+					updateMinWidth(getItems());
+				}
+			}
+		});
+		minWidthProperty().addListener((obs, o, n) -> updateMinWidth(getItems()));
+		setMinWidth(90);
+	}
+
+	private void updateMinWidth(List<MenuItem> items) {
+		for (int i = 0; i < items.size(); i++) {
+			if (items.get(i) instanceof Menu menu) {
+				if (!menu.getProperties().containsKey(NOT_EXTENDS_FLAG)) {
+					boolean isItemsMenu = false; // 为 true 时表示子菜单是一般菜单项，继续应用最小宽度
+					ObservableList<MenuItem> subItems = menu.getItems();
+					for (int j = 0; j < subItems.size(); j++) {
+						if (subItems.get(j).getClass().equals(MenuItem.class)) {
+							isItemsMenu = true;
+							break;
+						}
+					}
+					if (isItemsMenu) {
+						updateMinWidth(menu.getItems());
+					}
+				}
+			} else {
+				items.get(i).setStyle(STYLE_TEMPLATE.formatted(getMinWidth(), getMinWidth()));
+			}
+		}
+	}
+}