ShellMain.java

// Copyright (c) 2015 Andrzej Borucki, see LICENSE file
package com.blogspot.borneq;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabFolder2Adapter;
import org.eclipse.swt.custom.CTabFolderEvent;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.CoolItem;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;

/**
 * Main window of application. This is a special window, because has event loop.
 * Creating main menu and other controls.
 *
 * @author Andrzej Borucki
 * @version 1.0
 * @since 2015-07-13
 */
public class ShellMain {

    final private Shell shell;
    final private Display display;
    private Image image;
    private MostRecentlyUsed mru;
    private static CommandsFile commandsFile;

    private void makeFileMenu(Menu bar) {
        MenuItem fileItem = new MenuItem(bar, SWT.CASCADE);
        fileItem.setText("&File");
        Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
        fileItem.setMenu(fileMenu);

        MenuItem item = new MenuItem(fileMenu, SWT.PUSH);
        item.setText("&Open\tCtrl+O");
        item.addListener(SWT.Selection, new Listener() {
            @Override
            public void handleEvent(Event event) {
                System.out.println("Open");
                // commandsFile.ChooseOpenDoc();
            }
        });
        item.setAccelerator(SWT.MOD1 + 'O');

        MenuItem recentItem = new MenuItem(fileMenu, SWT.CASCADE);
        recentItem.setText("Open &Recent");
        mru = new MostRecentlyUsed(recentItem, shell);
    }

    private void makeMainMenu() {
        Menu bar = new Menu(shell, SWT.BAR);
        shell.setMenuBar(bar);
        makeFileMenu(bar);
    }

    private Control addFileToolBar(Composite composite, Shell shell, ZipFileHandler zipHandler) {
        ToolBar toolBar = new ToolBar(composite, SWT.NONE);

        ToolItem item = new ToolItem(toolBar, SWT.PUSH);
        InputStream stream = new ByteArrayInputStream(zipHandler.getEntry("new-document16.png"));
        Image icon = new Image(display, stream);
        item.setImage(icon);
        item.setToolTipText("New document");
        item.addListener(SWT.Selection, new Listener() {
            @Override
            public void handleEvent(Event event) {
                System.out.println("New");
                IconEditApp.registerShell(new ShellMain());
                // CommandsFile.NewDoc();
            }
        });

        item = new ToolItem(toolBar, SWT.PUSH);
        stream = new ByteArrayInputStream(zipHandler.getEntry("open-document16.png"));
        icon = new Image(display, stream);
        item.setImage(icon);
        item.setToolTipText("Open document");
        item.addListener(SWT.Selection, new Listener() {
            @Override
            public void handleEvent(Event event) {
                System.out.println("Open");
                // CommandsFile.ChooseOpenDoc();
            }
        });
        return toolBar;
    }

    private void createCoolBar() {
        CoolBar coolBar = new CoolBar(shell, SWT.BORDER);
        // coolBar.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        ZipFileHandler zipHandler = new ZipFileHandler("icons.zip");
        CoolItem item = new CoolItem(coolBar, SWT.DROP_DOWN);
        item.setControl(addFileToolBar(coolBar, shell, zipHandler));
        Control control = item.getControl();
        Point size = control.computeSize(SWT.DEFAULT, SWT.DEFAULT);
        item.setPreferredSize(item.computeSize(size.x, size.y));

        try {
            zipHandler.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        coolBar.pack();
    }

    void createTabs() {
        shell.setLayout(new GridLayout()); // Important! This line is essential for CTabFolder view
        GC gc = new GC(image);
        gc.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
        gc.fillRectangle(0, 0, 16, 16);
        gc.setBackground(display.getSystemColor(SWT.COLOR_YELLOW));
        gc.fillRectangle(3, 3, 10, 10);
        gc.dispose();
        final CTabFolder folder = new CTabFolder(shell, SWT.BORDER);
        folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
        folder.setSimple(false);
        folder.setUnselectedImageVisible(false);
        folder.setUnselectedCloseVisible(false);
        for (int i = 0; i < 8; i++) {
            CTabItem item = new CTabItem(folder, SWT.CLOSE);
            item.setText("Item " + i);
            item.setImage(image);
            Text text = new Text(folder, SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL);
            text.setText("item " + i);
            item.setControl(text);
        }
        folder.setMinimizeVisible(true);
        folder.setMaximizeVisible(true);
        folder.addCTabFolder2Listener(new CTabFolder2Adapter() {
            @Override
            public void minimize(CTabFolderEvent event) {
                folder.setMinimized(true);
                folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
                shell.layout(true);
            }

            @Override
            public void maximize(CTabFolderEvent event) {
                folder.setMaximized(true);
                folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
                shell.layout(true);
            }

            @Override
            public void restore(CTabFolderEvent event) {
                folder.setMinimized(false);
                folder.setMaximized(false);
                folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
                shell.layout(true);
            }
        });
    }

    private void init() {
        shell.setText("IconEdit");
        shell.setSize (300, 300);
        makeMainMenu();
        createCoolBar();
        createTabs();
    }

    public ShellMain() {
        // ======================================================
        // Create the main Display object that represents the UI
        // subsystem and contains the single UI handling thread
        // ======================================================
        display = Display.getDefault();
        // ====================================================
        // create a shell for the main window from the Display
        // ====================================================
        shell = new Shell(display, SWT.SHELL_TRIM);
        // =============================================================
        // Register a listener for the Close event on the main Shell.
        // This disposes the Display which will cause the entire child
        // tree to dispose
        // =============================================================
        image = new Image(display, 16, 16);
        shell.addListener(SWT.Close, new Listener() {
            @Override
            public void handleEvent(Event event) {
                System.out.println("Main Shell handling Close event, about to dipose the main Display");
                image.dispose();
            }
        });
        init(); // creates components
        shell.pack();
        shell.open();
    }

    public boolean isDisposed() {
        return shell.isDisposed();
    }
}