64 lines
1.7 KiB
Java
64 lines
1.7 KiB
Java
package com.imyeyu.fx.ui.components;
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import javafx.collections.ListChangeListener;
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import javafx.collections.ObservableList;
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import javafx.scene.control.Menu;
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import javafx.scene.control.MenuItem;
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import java.util.List;
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/**
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* 支持最小尺寸的菜单，默认 90
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*
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* @author 夜雨
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* @since 2023-03-10 11:14
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*/
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public class ContextMenu extends javafx.scene.control.ContextMenu {
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/** 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 */
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public static final String NOT_EXTENDS_FLAG = "NOT_EXTENDS_FLAG";
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private static final String STYLE_TEMPLATE = "-fx-min-width: %s; -fx-pref-width: %s";
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/**
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* 标准构造
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*
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* @param items 菜单项
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*/
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public ContextMenu(MenuItem... items) {
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super(items);
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getItems().addListener((ListChangeListener<MenuItem>) c -> {
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while (c.next()) {
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if (c.wasAdded()) {
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updateMinWidth(getItems());
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}
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}
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});
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minWidthProperty().addListener((obs, o, n) -> updateMinWidth(getItems()));
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setMinWidth(90);
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}
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private void updateMinWidth(List<MenuItem> items) {
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for (MenuItem item : items) {
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if (item instanceof Menu menu) {
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if (!menu.getProperties().containsKey(NOT_EXTENDS_FLAG)) {
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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
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ObservableList<MenuItem> subItems = menu.getItems();
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for (MenuItem subItem : subItems) {
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if (subItem.getClass().equals(MenuItem.class)) {
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isItemsMenu = true;
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break;
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}
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}
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if (isItemsMenu) {
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updateMinWidth(menu.getItems());
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}
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}
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} else {
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item.setStyle(STYLE_TEMPLATE.formatted(getMinWidth(), getMinWidth()));
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}
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}
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}
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}
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