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• 1.4.8
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• MenuBar.java

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com.kotcrab.vis.ui.widget.MenuBar Maven / Gradle / Ivy

/*
 * Copyright 2014-2017 See AUTHORS file.
 *
 * Licensed 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.kotcrab.vis.ui.widget;

import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.utils.Drawable;
import com.badlogic.gdx.utils.Array;
import com.kotcrab.vis.ui.VisUI;

/**
 * Bar with expandable menus available after pressing button, usually displayed on top of the stage.
 * @author Kotcrab
 */
public class MenuBar {
	private Table mainTable;
	private Table menuItems;

	private Menu currentMenu;
	private Array menus = new Array();

	private MenuBarListener menuListener;

	public MenuBar () {
		this("default");
	}

	public MenuBar (String styleName) {
		this(VisUI.getSkin().get(styleName, MenuBarStyle.class));
	}

	public MenuBar (MenuBarStyle style) {
		menuItems = new VisTable();

		mainTable = new VisTable() {
			@Override
			protected void sizeChanged () {
				super.sizeChanged();
				closeMenu();
			}
		};

		mainTable.left();
		mainTable.add(menuItems);
		mainTable.setBackground(style.background);
	}

	public void addMenu (Menu menu) {
		menus.add(menu);
		menu.setMenuBar(this);
		menuItems.add(menu.getOpenButton());
	}

	public boolean removeMenu (Menu menu) {
		boolean removed = menus.removeValue(menu, true);

		if (removed) {
			menu.setMenuBar(null);
			menuItems.removeActor(menu.getOpenButton());
		}

		return removed;
	}

	public void insertMenu (int index, Menu menu) {
		menus.insert(index, menu);
		menu.setMenuBar(this);
		rebuild();
	}

	private void rebuild () {
		menuItems.clear();
		for (Menu menu : menus)
			menuItems.add(menu.getOpenButton());
	}

	/** Closes currently opened menu (if any). Used by framework and typically there is no need to call this manually */
	public void closeMenu () {
		if (currentMenu != null) {
			currentMenu.deselectButton();
			currentMenu.remove();
			currentMenu = null;
		}
	}

	Menu getCurrentMenu () {
		return currentMenu;
	}

	void setCurrentMenu (Menu newMenu) {
		if (currentMenu == newMenu) return;
		if (currentMenu != null) {
			currentMenu.deselectButton();
			if (menuListener != null) menuListener.menuClosed(currentMenu);
		}
		if (newMenu != null) {
			newMenu.selectButton();
			if (menuListener != null) menuListener.menuOpened(newMenu);
		}
		currentMenu = newMenu;
	}

	public void setMenuListener (MenuBarListener menuListener) {
		this.menuListener = menuListener;
	}

	/** Returns table containing all menus that should be added to Stage, typically with expandX and fillX properties. */
	public Table getTable () {
		return mainTable;
	}

	public static class MenuBarStyle {
		public Drawable background;

		public MenuBarStyle () {
		}

		public MenuBarStyle (MenuBarStyle style) {
			this.background = style.background;
		}

		public MenuBarStyle (Drawable background) {
			this.background = background;
		}
	}

	public interface MenuBarListener {
		void menuOpened (Menu menu);

		void menuClosed (Menu menu);
	}
}