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

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Flat UI skin for LibGDX scene2d.ui
There is a newer version: 0.3.1
/*******************************************************************************
 * Copyright 2014 Pawel Pastuszak
 *
 * 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 pl.kotcrab.vis.ui.widget;

import pl.kotcrab.vis.ui.VisUI;

import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Image;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
import com.badlogic.gdx.utils.Array;

public class MenuBar {
	private Array menus;
	private Stage stage;
	private Skin skin;

	private Table mainTable;
	private Table menuItems;

	private MenuBarItem currentMenu;
	private boolean menuVisible = false;

	public MenuBar (Stage stage) {
		this.skin = VisUI.skin;
		this.stage = stage;

		menus = new Array();
		mainTable = new Table(skin);
		menuItems = new Table(skin);

		mainTable.add(menuItems);
		mainTable.add(new Image(skin.getRegion("menu-bar-button"))).expand().fill();

		stage.addListener(new InputListener() {
			@Override
			public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) {
				if (currentMenu != null) {
					if (menuVisible) {
						Vector2 pos = currentMenu.menu.localToStageCoordinates(new Vector2(0, 0));
						Rectangle rect = new Rectangle(pos.x, pos.y, currentMenu.menu.getWidth(), currentMenu.menu.getHeight());

						if (rect.contains(x, y) == false) closeMenu();
						return true;
					} else
						menuVisible = true;
				}

				return false;
			}

			@Override
			public void touchUp (InputEvent event, float x, float y, int pointer, int button) {
				if (menuVisible) closeMenu();
			}

		});
	}

	private void closeMenu () {
		if (currentMenu != null) {
			currentMenu.menu.remove();
			currentMenu = null;
			menuVisible = false;
		}
	}

	public void addMenu (Menu menu) {
		menus.add(new MenuBarItem(menu));
		menu.clear();
	}

	private class MenuBarItem {
		public Menu menu;
		public TextButton menuOpenButton;

		public MenuBarItem (Menu menu) {
			this.menu = menu;
			menuOpenButton = new TextButton(menu.getTitle(), skin, "menu-bar");
			menuItems.add(menuOpenButton);

			menuOpenButton.addListener(new InputListener() {
				@Override
				public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) {
					closeMenu();
					showMenu();
					return false;
				}

				@Override
				public void enter (InputEvent event, float x, float y, int pointer, Actor fromActor) {
					switchMenu();
				}
			});
		}

		private void switchMenu () {
			if (currentMenu != null && currentMenu != this) {
				closeMenu();
				showMenu();
				menuVisible = true; // manually set that menu is visible because touch down event won't occur
			}
		}

		private void showMenu () {
			Vector2 pos = menuOpenButton.localToStageCoordinates(new Vector2(0, 0));
			menu.setPosition(pos.x, pos.y - menu.getHeight());
			stage.addActor(menu);
			currentMenu = this;
		}
	}

	public Table getTable () {
		return mainTable;
	}

	public void resize () {
		closeMenu();
	}
}