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 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package ensemble.samples.controls.menu;

import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.beans.property.BooleanProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.geometry.Pos;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.CheckMenuItem;
import javafx.scene.control.Label;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.KeyCombination;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

/**
 * An example of a menu bar. The example includes use of the system bar, if the
 * current platform supports a system bar.
 *
 * @sampleName Menu
 * @preview preview.png
 * @docUrl http://www.oracle.com/pls/topic/lookup?ctx=javase80&id=JFXUI336 Using JavaFX UI Controls
 * @see javafx.scene.control.Menu
 * @see javafx.scene.control.MenuBar
 * @see javafx.scene.control.MenuItem
 * @see javafx.scene.input.KeyCombination
 *
 * @related /Controls/DatePicker
 * @related /Graphics 2d/Images/Image Creation
 */
public class MenuApp extends Application {

    private final Label sysMenuLabel = new Label("Using System Menu");

    public Parent createContent() {
        final String os = System.getProperty("os.name");
        VBox vbox = new VBox(20);
        vbox.setPrefSize(300, 100);
        final MenuBar menuBar = new MenuBar();

        // Sub menus for Options->Submenu 1
        MenuItem menu111 = new MenuItem("blah");
        final MenuItem menu112 = new MenuItem("foo");
        final CheckMenuItem menu113 = new CheckMenuItem("Show \"foo\" item");
        menu113.setSelected(true);
        menu113.selectedProperty().addListener((Observable valueModel) -> {
            menu112.setVisible(menu113.isSelected());
        });
        // Options->Submenu 1 submenu
        final String INFO = "/ensemble/samples/shared-resources/menuInfo.png";
        final Image INFO_MENU_IMAGE =
            new Image(getClass().getResourceAsStream(INFO));
        Menu menu11 = new Menu("Submenu 1", new ImageView(INFO_MENU_IMAGE));
        menu11.getItems().addAll(menu111, menu112, menu113);
        // Options->Submenu 2 submenu
        MenuItem menu121 = new MenuItem("Item 1");
        MenuItem menu122 = new MenuItem("Item 2");
        Menu menu12 = new Menu("Submenu 2");
        menu12.getItems().addAll(menu121, menu122);

        // Options->Change Text
        final String change[] = { "Change Text", "Change Back" };
        final MenuItem menu13 = new MenuItem(change[0]);
        menu13.setAccelerator(KeyCombination.keyCombination("Shortcut+C"));
        menu13.setOnAction((ActionEvent t) -> {
            final String menuText =
                menu13.getText().equals(change[0]) ? change[1] : change[0];
            menu13.setText(menuText);
        });

        // Options menu
        Menu menu1 = new Menu("Options");
        menu1.getItems().addAll(menu11, menu12, menu13);
        menuBar.getMenus().addAll(menu1);

        if (os != null && os.startsWith("Mac")) {
            Menu systemMenuBarMenu = new Menu("MenuBar Options");

            final String check = "Use System Menu Bar (Only works on Mac)";
            final CheckMenuItem useSystemMenuBarCB = new CheckMenuItem(check);
            useSystemMenuBarCB.setSelected(true);
            BooleanProperty selectedCB = useSystemMenuBarCB.selectedProperty();
            menuBar.useSystemMenuBarProperty().bindBidirectional(selectedCB);
            systemMenuBarMenu.getItems().add(useSystemMenuBarCB);

            menuBar.getMenus().add(systemMenuBarMenu);

            HBox hbox = new HBox();
            hbox.setAlignment(Pos.CENTER);
            sysMenuLabel.setStyle("-fx-font-size: 24");
            hbox.getChildren().add(sysMenuLabel);
            vbox.getChildren().add(hbox);
            sysMenuLabel.setVisible((menuBar.getHeight() == 0));
            ChangeListener<? super Number> heightListener =
                (ObservableValue<? extends Number> ov,
                        Number old, Number now) -> {
                    sysMenuLabel.setVisible((menuBar.getHeight() == 0));
                };
            menuBar.heightProperty().addListener(heightListener);
        }

        vbox.getChildren().addAll(menuBar);
        return vbox;
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setScene(new Scene(createContent()));
        primaryStage.show();
    }

    /**
     * Java main for when running without JavaFX launcher
     * @param args command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
}