MainWindow.java

package seedu.inventory.ui;

import java.util.logging.Logger;

import com.google.common.eventbus.Subscribe;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TextInputControl;
import javafx.scene.input.KeyCombination;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import seedu.inventory.commons.core.Config;
import seedu.inventory.commons.core.GuiSettings;
import seedu.inventory.commons.core.LogsCenter;
import seedu.inventory.commons.events.model.AccessItemEvent;
import seedu.inventory.commons.events.model.AccessPurchaseOrderEvent;
import seedu.inventory.commons.events.model.AccessSaleEvent;
import seedu.inventory.commons.events.model.AccessStaffEvent;
import seedu.inventory.commons.events.ui.ExitAppRequestEvent;
import seedu.inventory.commons.events.ui.ShowBrowserPanelEvent;
import seedu.inventory.commons.events.ui.ShowHelpRequestEvent;
import seedu.inventory.commons.events.ui.ShowItemTableViewEvent;
import seedu.inventory.commons.events.ui.ShowPurchaseOrderTableViewEvent;
import seedu.inventory.commons.events.ui.ShowSaleTableViewEvent;
import seedu.inventory.commons.events.ui.ShowStaffTableViewEvent;
import seedu.inventory.commons.events.ui.ToggleSidePanelVisibilityEvent;
import seedu.inventory.logic.Logic;
import seedu.inventory.model.UserPrefs;
import seedu.inventory.ui.purchaseorder.PurchaseOrderListPanel;
import seedu.inventory.ui.sale.SaleListPanel;
import seedu.inventory.ui.staff.StaffCardListPanel;

/**
 * The Main Window. Provides the basic application layout containing
 * a menu bar and space where other JavaFX elements can be placed.
 */
public class MainWindow extends UiPart<Stage> {

    private static final String FXML = "MainWindow.fxml";

    private final Logger logger = LogsCenter.getLogger(getClass());

    private Stage primaryStage;
    private Logic logic;

    // Independent Ui parts residing in this Ui container
    private BrowserPanel browserPanel;
    private ItemTableView itemTableView;
    private SaleTableView saleTableView;
    private StaffTableView staffTableView;
    private PurchaseOrderTableView purchaseOrderTableView;

    private ItemListPanel itemListPanel;
    private PurchaseOrderListPanel purchaseOrderListPanel;
    private SaleListPanel saleListPanel;
    private StaffCardListPanel staffCardListPanel;

    private Config config;
    private UserPrefs prefs;
    private HelpWindow helpWindow;

    @FXML
    private StackPane browserPlaceholder;

    @FXML
    private StackPane commandBoxPlaceholder;

    @FXML
    private MenuItem helpMenuItem;

    @FXML
    private StackPane itemListPanelPlaceholder;

    @FXML
    private StackPane resultDisplayPlaceholder;

    @FXML
    private StackPane statusbarPlaceholder;

    public MainWindow(Stage primaryStage, Config config, UserPrefs prefs, Logic logic) {
        super(FXML, primaryStage);

        // Set dependencies
        this.primaryStage = primaryStage;
        this.logic = logic;
        this.config = config;
        this.prefs = prefs;

        // Configure the UI
        setTitle(config.getAppTitle());
        setWindowDefaultSize(prefs);

        setAccelerators();
        registerAsAnEventHandler(this);

        helpWindow = new HelpWindow();
    }

    public Stage getPrimaryStage() {
        return primaryStage;
    }

    private void setAccelerators() {
        setAccelerator(helpMenuItem, KeyCombination.valueOf("F1"));
    }

    /**
     * Sets the accelerator of a MenuItem.
     *
     * @param keyCombination the KeyCombination value of the accelerator
     */
    private void setAccelerator(MenuItem menuItem, KeyCombination keyCombination) {
        menuItem.setAccelerator(keyCombination);

        getRoot().addEventFilter(KeyEvent.KEY_PRESSED, event -> {
            if (event.getTarget() instanceof TextInputControl && keyCombination.match(event)) {
                menuItem.getOnAction().handle(new ActionEvent());
                event.consume();
            }
        });
    }

    /**
     * Fills up all the placeholders of this window.
     */
    void fillInnerParts() {
        browserPanel = new BrowserPanel();
        itemTableView = new ItemTableView(logic.getFilteredItemList());
        saleTableView = new SaleTableView(logic.getObservableSaleList());
        staffTableView = new StaffTableView(logic.getFilteredStaffList());
        purchaseOrderTableView = new PurchaseOrderTableView(logic.getFilteredPurchaseOrderList());
        browserPlaceholder.getChildren().add(browserPanel.getRoot());

        itemListPanel = new ItemListPanel(logic.getFilteredItemList());
        itemListPanelPlaceholder.getChildren().add(itemListPanel.getRoot());
        itemListPanelPlaceholder.setVisible(false);

        purchaseOrderListPanel = new PurchaseOrderListPanel(logic.getFilteredPurchaseOrderList());
        //personListPanelPlaceholder.getChildren().add(purchaseOrderListPanel.getRoot());


        staffCardListPanel = new StaffCardListPanel(logic.getFilteredStaffList());

        saleListPanel = new SaleListPanel(logic.getObservableSaleList());

        ResultDisplay resultDisplay = new ResultDisplay();
        resultDisplayPlaceholder.getChildren().add(resultDisplay.getRoot());

        StatusBarFooter statusBarFooter = new StatusBarFooter(prefs.getInventoryFilePath());
        statusbarPlaceholder.getChildren().add(statusBarFooter.getRoot());

        CommandBox commandBox = new CommandBox(logic);
        commandBoxPlaceholder.getChildren().add(commandBox.getRoot());
    }

    private void setPanelPurchaseOrder() {
        itemListPanelPlaceholder.getChildren().clear();
        itemListPanelPlaceholder.getChildren().add(purchaseOrderListPanel.getRoot());
    }

    private void setPanelPerson() {
        itemListPanelPlaceholder.getChildren().clear();
        itemListPanelPlaceholder.getChildren().add(itemListPanel.getRoot());
    }

    private void setPanelStaff() {
        itemListPanelPlaceholder.getChildren().clear();
        itemListPanelPlaceholder.getChildren().add(staffCardListPanel.getRoot());
    }

    private void setPanelSale() {
        itemListPanelPlaceholder.getChildren().clear();
        itemListPanelPlaceholder.getChildren().add(saleListPanel.getRoot());
    }

    private void setItemTableView() {
        browserPlaceholder.getChildren().clear();
        browserPlaceholder.getChildren().add(itemTableView.getRoot());
    }

    private void setSaleTableView() {
        browserPlaceholder.getChildren().clear();
        browserPlaceholder.getChildren().add(saleTableView.getRoot());
    }

    private void setStaffTableView() {
        browserPlaceholder.getChildren().clear();
        browserPlaceholder.getChildren().add(staffTableView.getRoot());
    }

    private void setPurchaseOrderTableView() {
        browserPlaceholder.getChildren().clear();
        browserPlaceholder.getChildren().add(purchaseOrderTableView.getRoot());
    }

    private void setBrowserPanel() {
        browserPlaceholder.getChildren().clear();
        browserPlaceholder.getChildren().add(browserPanel.getRoot());
    }

    void hide() {
        primaryStage.hide();
    }

    private void setTitle(String appTitle) {
        primaryStage.setTitle(appTitle);
    }

    /**
     * Sets the default size based on user preferences.
     */
    private void setWindowDefaultSize(UserPrefs prefs) {
        primaryStage.setHeight(prefs.getGuiSettings().getWindowHeight());
        primaryStage.setWidth(prefs.getGuiSettings().getWindowWidth());
        if (prefs.getGuiSettings().getWindowCoordinates() != null) {
            primaryStage.setX(prefs.getGuiSettings().getWindowCoordinates().getX());
            primaryStage.setY(prefs.getGuiSettings().getWindowCoordinates().getY());
        }
    }

    /**
     * Returns the current size and the position of the main Window.
     */
    GuiSettings getCurrentGuiSetting() {
        return new GuiSettings(primaryStage.getWidth(), primaryStage.getHeight(),
                (int) primaryStage.getX(), (int) primaryStage.getY());
    }

    /**
     * Opens the help window or focuses on it if it's already opened.
     */
    @FXML
    public void handleHelp() {
        if (!helpWindow.isShowing()) {
            helpWindow.show();
        } else {
            helpWindow.focus();
        }
    }

    void show() {
        primaryStage.show();
    }

    /**
     * Closes the application.
     */
    @FXML
    private void handleExit() {
        raise(new ExitAppRequestEvent());
    }

    public ItemListPanel getItemListPanel() {
        return itemListPanel;
    }

    void releaseResources() {
        browserPanel.freeResources();
    }

    @Subscribe
    private void handleAcessItem(AccessItemEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setPanelPerson();
    }

    @Subscribe
    private void handleAcessPo(AccessPurchaseOrderEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setPanelPurchaseOrder();
    }

    @Subscribe
    private void handleAccessStaff(AccessStaffEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setPanelStaff();
    }

    @Subscribe
    private void handleAcessSale(AccessSaleEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setPanelSale();
    }

    @Subscribe
    private void handleShowHelpEvent(ShowHelpRequestEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        handleHelp();
    }

    @Subscribe
    private void handleToggleSidePanelVisibilityEvent(ToggleSidePanelVisibilityEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        itemListPanelPlaceholder.setVisible(event.isVisible);
        if (event.isVisible) {
            setPanelPerson();
        }
    }

    @Subscribe
    private void handleShowBrowserPanelEvent(ShowBrowserPanelEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setBrowserPanel();
    }

    @Subscribe
    private void handleShowItemTableViewEvent(ShowItemTableViewEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setItemTableView();
    }

    @Subscribe
    private void handleShowSaleTableViewEvent(ShowSaleTableViewEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setSaleTableView();
    }

    @Subscribe
    private void handleShowStaffTableViewEvent(ShowStaffTableViewEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setStaffTableView();
    }

    @Subscribe
    private void handleShowPurchaseOrderTableViewEvent(ShowPurchaseOrderTableViewEvent event) {
        logger.info(LogsCenter.getEventHandlingLogMessage(event));
        setPurchaseOrderTableView();
    }
}