DocumentList.java

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package com.arcle.rmt.superwaba.vc;

import waba.ui.ListBox;
import waba.ui.Button;
import waba.ui.Event;
import waba.ui.ControlEvent;
import waba.ui.MenuBar;

import com.arcle.rmt.superwaba.AboutDialog;
import com.arcle.rmt.superwaba.ui.CommandWindow;
import com.arcle.rmt.superwaba.framework.View;
import com.arcle.rmt.superwaba.framework.Model;
import com.arcle.rmt.superwaba.model.DocumentManager;
import com.arcle.rmt.superwaba.vc.DocumentListController;


public final class DocumentList extends CommandWindow implements View {

    private DocumentList() {
        super("Document List", TAB_ONLY_BORDER);
    }

    public static DocumentList getInstance() {
        if (_instance == null) {
            _instance = new DocumentList();
        }
        return _instance;
    }

    //-----------------------------------------------------------------------
    // View implementation

    public void modelUpdated() {
        DocumentManager dm = DocumentManager.getInstance();
        listView.removeAll();
        String[] docNames = dm.listDocuments();
        if (docNames != null) {
            listView.add(docNames);
        }
        listView.repaint();
    }

    //-----------------------------------------------------------------------
    // Public methods

    protected DocumentListController getController() {
        /* Even though that the controller is a singleton (thus accessible
           from anywhere), this method exists so that access to the
           controller is localized. Therefore, should the controller no
           longer be a singleton, only this method need to be changed. */
        return DocumentListController.getInstance();
    }


    //-----------------------------------------------------------------------
    // Implemented Abstract Methods

    public void initChildren() {
        btNew = createButton("New");
        listView = createDocumentListView();
        setMenuBar(createMenuBar());
    }

    public Button[] getCommandButtons() {
        return new Button[] {
            btNew
        };
    }

    //-----------------------------------------------------------------------
    // Overridden Methods

    public void layoutChildren() {
        super.layoutChildren();
        add(listView);
        listView.setRect(LEFT, TOP, FILL, FILL - getBottomMargin());
    }

    public void initCompleted() {
        modelUpdated();
    }

    public void onEvent(Event event) {
        switch (event.type) {
        case ControlEvent.PRESSED:
            if (event.target == null) {
                // ignore event
            } else if (event.target == btNew) {
                getController().cmdNewDocument();
                event.consumed = true;
            } else if(event.target == listView) {
                String documentName = (String) listView.getSelectedItem();
                if (documentName != null) {
                    getController().cmdEditDocument(documentName);
                    event.consumed = true;
                }
            }
        case ControlEvent.WINDOW_CLOSED:
            if (event.target == menubar) {
                handleMenuEvent(((MenuBar) menubar).getSelectedMenuItem());
            }
        }
    }

    //-----------------------------------------------------------------------
    // Factory Methods

    protected ListBox createDocumentListView() {
        ListBox lb = new ListBox();
        lb.setSimpleBorder(true);
        return lb;
    }

    protected MenuBar createMenuBar() {
        String menuItems[][] = {
            {"Document",
                "New Document"},
            {"Help",
                "About"}
        };
        return new MenuBar(menuItems);
    }

    //-----------------------------------------------------------------------

    protected void handleMenuEvent(int selectedItem) {
        if (0 <= selectedItem && selectedItem < 100) {
            // an item from the first pulldown menu was seleted
            switch (selectedItem) {
            case 1: // new document
                getController().cmdNewDocument();
            }
        } else if (selectedItem < 200 ) {
            // an item from the second pulldown menu was selected
            selectedItem -= 100;
            switch (selectedItem) {
            case 1: // "about"
                AboutDialog.show();
            }
        }
    }


    //-----------------------------------------------------------------------
    // Member Variables

    private Button btNew;

    // not necessary?
    private Button btDetails;

    private ListBox listView;

    private static DocumentList _instance;

}

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