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/*
 * Copyright (c) 2008, 2014, Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - 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
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package ensemble;


import ensemble.control.Popover;
import ensemble.control.SearchBox;
import ensemble.control.TitledToolBar;
import ensemble.generated.Samples;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Point2D;
import javafx.geometry.Rectangle2D;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;
import javafx.scene.paint.Color;
import javafx.scene.transform.Scale;
import javafx.stage.Screen;
import javafx.stage.Stage;


/**
 * Ensemble Application
 */
public class EnsembleApp extends Application {
    private static final String OS_NAME = System.getProperty("ensemble.os.name", System.getProperty("os.name"));
    private static final String OS_ARCH = System.getProperty("ensemble.os.arch", System.getProperty("os.arch"));
    public static final boolean IS_IPHONE = false;
    public static final boolean IS_IOS = "iOS".equals(OS_NAME);
    public static final boolean IS_ANDROID = "android".equals(System.getProperty("javafx.platform")) || "Dalvik".equals(System.getProperty("java.vm.name"));
    public static final boolean IS_EMBEDDED = "arm".equals(OS_ARCH) && !IS_IOS && !IS_ANDROID;
    public static final boolean IS_DESKTOP = !IS_EMBEDDED && !IS_IOS && !IS_ANDROID;
    public static final boolean IS_MAC = OS_NAME.startsWith("Mac");
    public static final boolean PRELOAD_PREVIEW_IMAGES = true;
    public static final boolean SHOW_HIGHLIGHTS = IS_DESKTOP;
    public static final boolean SHOW_MENU = Boolean.getBoolean("ensemble.menu.show");
    public static final boolean SELECT_IOS_THEME = false;
    private static final int TOOL_BAR_BUTTON_SIZE = 30;
    private Scene scene;
    private Pane root;
    private TitledToolBar toolBar;
    private Button backButton;
    private Button forwardButton;
    private Button homeButton;
    private ToggleButton listButton;
    private ToggleButton searchButton;
    private final SearchBox searchBox = new SearchBox();
    private PageBrowser pageBrowser;
    private Popover sampleListPopover;
    private SearchPopover searchPopover;
    private MenuBar menuBar;

    static {
        System.setProperty("java.net.useSystemProxies", "true");
        Logger.getLogger(EnsembleApp.class.getName()).finer("IS_IPHONE = " + IS_IPHONE);
        Logger.getLogger(EnsembleApp.class.getName()).finer("IS_MAC = " + IS_MAC);
        Logger.getLogger(EnsembleApp.class.getName()).finer("IS_IOS = " + IS_IOS);
        Logger.getLogger(EnsembleApp.class.getName()).finer("IS_ANDROID = " + IS_ANDROID);
        Logger.getLogger(EnsembleApp.class.getName()).finer("IS_EMBEDDED = " + IS_EMBEDDED);
        Logger.getLogger(EnsembleApp.class.getName()).finer("IS_DESKTOP = " + IS_DESKTOP);
    }

    @Override public void init() throws Exception {
        // CREATE ROOT
        root = new Pane() {
            @Override protected void layoutChildren() {
                super.layoutChildren();
                final double w = getWidth();
                final double h = getHeight();
                final double menuHeight = SHOW_MENU ? menuBar.prefHeight(w) : 0;
                final double toolBarHeight = toolBar.prefHeight(w);
                if (menuBar != null) {
                    menuBar.resize(w, menuHeight);
                }
                toolBar.resizeRelocate(0, menuHeight, w, toolBarHeight);
                pageBrowser.setLayoutY(toolBarHeight + menuHeight);
                pageBrowser.resize(w, h-toolBarHeight);
                pageBrowser.resize(w, h - toolBarHeight - menuHeight);
                sampleListPopover.autosize();
                Point2D listBtnBottomCenter = listButton.localToScene(listButton.getWidth()/2, listButton.getHeight());
                sampleListPopover.setLayoutX((int)listBtnBottomCenter.getX()-50);
                sampleListPopover.setLayoutY((int)listBtnBottomCenter.getY()+20);
                Point2D searchBoxBottomCenter = searchBox.localToScene(searchBox.getWidth()/2, searchBox.getHeight());
                searchPopover.setLayoutX((int)searchBoxBottomCenter.getX()-searchPopover.getLayoutBounds().getWidth()+50);
                searchPopover.setLayoutY((int)searchBoxBottomCenter.getY()+20);
            }
        };
        // CREATE MENUBAR
        if (SHOW_MENU) {
            menuBar = new MenuBar();
            menuBar.setUseSystemMenuBar(true);
            ToggleGroup screenSizeToggle = new ToggleGroup();
            Menu menu = new Menu("Screen size");
            menu.getItems().addAll(
                    screenSizeMenuItem("iPad Landscape", 1024, 768, false, screenSizeToggle),
                    screenSizeMenuItem("iPad Portrait", 768, 1024, false, screenSizeToggle),
                    screenSizeMenuItem("Beagleboard", 1024, 600, false, screenSizeToggle),
                    screenSizeMenuItem("iPad Retina Landscape", 2048, 1536, true, screenSizeToggle),
                    screenSizeMenuItem("iPad Retina Portrait", 1536, 2048, true, screenSizeToggle),
                    screenSizeMenuItem("iPhone Landscape", 480, 320, false, screenSizeToggle),
                    screenSizeMenuItem("iPhone Portrait", 320, 480, false, screenSizeToggle),
                    screenSizeMenuItem("iPhone 4 Landscape", 960, 640, true, screenSizeToggle),
                    screenSizeMenuItem("iPhone 4 Portrait", 640, 960, true, screenSizeToggle),
                    screenSizeMenuItem("iPhone 5 Landscape", 1136, 640, true, screenSizeToggle),
                    screenSizeMenuItem("iPhone 5 Portrait", 640, 1136, true, screenSizeToggle));
            menuBar.getMenus().add(menu);
            screenSizeToggle.selectToggle(screenSizeToggle.getToggles().get(0));

            root.getChildren().add(menuBar);
        }
        // CREATE TOOLBAR
        toolBar = new TitledToolBar();
        root.getChildren().add(toolBar);
        backButton = new Button();
        backButton.setId("back");
        backButton.getStyleClass().add("left-pill");
        backButton.setPrefSize(TOOL_BAR_BUTTON_SIZE, TOOL_BAR_BUTTON_SIZE);
        forwardButton = new Button();
        forwardButton.setId("forward");
        forwardButton.getStyleClass().add("center-pill");
        forwardButton.setPrefSize(TOOL_BAR_BUTTON_SIZE, TOOL_BAR_BUTTON_SIZE);
        homeButton = new Button();
        homeButton.setId("home");
        homeButton.setPrefSize(TOOL_BAR_BUTTON_SIZE, TOOL_BAR_BUTTON_SIZE);
        homeButton.getStyleClass().add("right-pill");
        HBox navButtons = new HBox(0,backButton,forwardButton,homeButton);
        listButton = new ToggleButton();
        listButton.setId("list");
        listButton.setPrefSize(TOOL_BAR_BUTTON_SIZE, TOOL_BAR_BUTTON_SIZE);
        HBox.setMargin(listButton, new Insets(0, 0, 0, 7));
        searchButton = new ToggleButton();
        searchButton.setId("search");
        searchButton.setPrefSize(TOOL_BAR_BUTTON_SIZE, TOOL_BAR_BUTTON_SIZE);
        searchBox.setPrefWidth(200);
        backButton.setGraphic(new Region());
        forwardButton.setGraphic(new Region());
        homeButton.setGraphic(new Region());
        listButton.setGraphic(new Region());
        searchButton.setGraphic(new Region());
        toolBar.addLeftItems(navButtons,listButton);
        toolBar.addRightItems(searchBox);

        // create PageBrowser
        pageBrowser = new PageBrowser();
        toolBar.titleTextProperty().bind(pageBrowser.currentPageTitleProperty());
        root.getChildren().add(0, pageBrowser);
        pageBrowser.goHome();
        // wire nav buttons
        backButton.setOnAction((ActionEvent event) -> {
            pageBrowser.backward();
        });
        backButton.disableProperty().bind(pageBrowser.backPossibleProperty().not());
        forwardButton.setOnAction((ActionEvent event) -> {
            pageBrowser.forward();
        });
        forwardButton.disableProperty().bind(pageBrowser.forwardPossibleProperty().not());
        homeButton.setOnAction((ActionEvent event) -> {
            pageBrowser.goHome();
        });
        homeButton.disableProperty().bind(pageBrowser.atHomeProperty());

        // create and setup list popover
        sampleListPopover = new Popover();
        sampleListPopover.setPrefWidth(440);
        root.getChildren().add(sampleListPopover);
        final SamplePopoverTreeList rootPage = new SamplePopoverTreeList(Samples.ROOT,pageBrowser);
        listButton.setOnMouseClicked((MouseEvent e) -> {
            if (sampleListPopover.isVisible()) {
                sampleListPopover.hide();
            } else {
                sampleListPopover.clearPages();
                sampleListPopover.pushPage(rootPage);
                sampleListPopover.show(() -> {
                    listButton.setSelected(false);
                });
            }
        });

        // create AndroidStyle menu handling
        if (IS_ANDROID) {
            root.setOnKeyReleased(new EventHandler() {
                private int exitCount = 0;

                @Override
                public void handle(KeyEvent event) {
                    if (event.getCode() == KeyCode.ESCAPE) {
                        if (sampleListPopover.isVisible()) {
                            sampleListPopover.hide();
                            event.consume();
                            return;
                        }

                        if (!backButton.isDisabled()) {
                            pageBrowser.backward();
                            event.consume();
                            return;
                        }
                        exitCount++;
                        if (exitCount == 2) {
                            System.exit(0);
                        }
                    } else {
                        exitCount = 0;
                    }

                    if (event.getCode() == KeyCode.CONTEXT_MENU) {
                        if (sampleListPopover.isVisible()) {
                            sampleListPopover.hide();
                        } else {
                            sampleListPopover.clearPages();
                            sampleListPopover.pushPage(rootPage);
                            sampleListPopover.show(() -> {
                                listButton.setSelected(false);
                            });
                        }
                        event.consume();
                    }
                }
            });
        }

        // create and setup search popover
        searchPopover = new SearchPopover(searchBox,pageBrowser);
        root.getChildren().add(searchPopover);
    }

    private RadioMenuItem screenSizeMenuItem(String text, final int width, final int height, final boolean retina, ToggleGroup tg) {
        RadioMenuItem radioMenuItem = new RadioMenuItem(text + " " + width + "x" + height);
        radioMenuItem.setToggleGroup(tg);
        radioMenuItem.setOnAction((ActionEvent t) -> {
            double menuHeight = IS_IOS || IS_MAC || IS_ANDROID ? 0 : menuBar.prefHeight(width);
            scene.getWindow().setWidth(width + scene.getWindow().getWidth() - scene.getWidth());
            scene.getWindow().setHeight(height + menuHeight + scene.getWindow().getHeight() - scene.getHeight());
            if (retina) {
                Parent root = scene.getRoot();
                if (root instanceof Pane) {
                    Group newRoot = new Group();
                    newRoot.setAutoSizeChildren(false);
                    scene.setRoot(newRoot);
                    newRoot.getChildren().add(root);
                    root.getTransforms().add(new Scale(2, 2, 0, 0));
                    root.resize(width/2, height/2);
                } else {
                    root.getChildrenUnmodifiable().get(0).resize(width/2, height/2);
                }
            } else {
                Parent root = scene.getRoot();
                if (root instanceof Group) {
                    Pane oldRoot = (Pane)root.getChildrenUnmodifiable().get(0);
                    ((Group)root).getChildren().clear();
                    oldRoot.getTransforms().clear();
                    scene.setRoot(oldRoot);
                }
            }
        });
        return radioMenuItem;
    }

    private void setStylesheets() {
        final String EXTERNAL_STYLESHEET = "http://fonts.googleapis.com/css?family=Source+Sans+Pro:200,300,400,600";
        scene.getStylesheets().setAll("/ensemble/EnsembleStylesCommon.css");
        Thread backgroundThread = new Thread(() -> {
            try {
                URL url = new URL(EXTERNAL_STYLESHEET);
                try (
                        ReadableByteChannel rbc = Channels.newChannel(url.openStream());
                        Reader newReader = Channels.newReader(rbc, "ISO-8859-1");
                        BufferedReader bufferedReader = new BufferedReader(newReader)
                        ) {
                    // Checking whether we can read a line from this url
                    // without exception
                    bufferedReader.readLine();
                }
                Platform.runLater(() -> {
                    // when succeeded add this stylesheet to the scene
                    scene.getStylesheets().add(EXTERNAL_STYLESHEET);
                });
            }catch (MalformedURLException ex) {
                Logger.getLogger(EnsembleApp.class.getName()).log(Level.FINE, "Failed to load external stylesheet", ex);
            }catch (IOException ex) {
                    Logger.getLogger(EnsembleApp.class.getName()).log(Level.FINE, "Failed to load external stylesheet", ex);
                }
        }, "Trying to reach external styleshet");
        backgroundThread.setDaemon(true);
        backgroundThread.start();
    }

    @Override public void start(final Stage stage) throws Exception {
        // CREATE SCENE
        scene = new Scene(root, 1024, 768, Color.BLACK);
        if (IS_EMBEDDED || IS_ANDROID) {
            new ScrollEventSynthesizer(scene);
        }
        setStylesheets();
        stage.setScene(scene);
        // START FULL SCREEN IF WANTED
        if (PlatformFeatures.START_FULL_SCREEN) {
            Rectangle2D primaryScreenBounds = Screen.getPrimary().getVisualBounds();
            stage.setX(primaryScreenBounds.getMinX());
            stage.setY(primaryScreenBounds.getMinY());
            stage.setWidth(primaryScreenBounds.getWidth());
            stage.setHeight(primaryScreenBounds.getHeight());
        }
        stage.setTitle("Ensemble");
        stage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
}




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