org.openmaji.implementation.tool.eclipse.ui.view.MultiView.java Source code

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Here is the source code for org.openmaji.implementation.tool.eclipse.ui.view.MultiView.java

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/*
 * @(#)MultiView.java
 *
 * Copyright 2003 by EkoLiving Pty Ltd.  All Rights Reserved.
 *
 * This software is the proprietary information of EkoLiving Pty Ltd.
 * Use is subject to license terms.
 */

/* ToDo:
 * - None, yet.
 */
package org.openmaji.implementation.tool.eclipse.ui.view;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;
import org.openmaji.implementation.tool.eclipse.icon.Icon;

/**
* <p>
* This allows you to duplicate views within views to get around
* Eclipse's inability to have more than one instance of a view. 
* </p>
* @author  mg
* @version 1.0
*/
public abstract class MultiView extends ViewPart {

    private GridLayout gridLayout;
    private Composite parentComposite;
    private List columnContents = new ArrayList();

    Action addColumnAction, removeColumnAction;

    public MultiView() {
        super();
    }

    /**
     * @see org.eclipse.ui.IWorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
     */
    public void createPartControl(Composite parent) {
        gridLayout = new GridLayout();
        gridLayout.numColumns = 0;
        gridLayout.makeColumnsEqualWidth = true;
        parent.setLayout(gridLayout);

        parentComposite = parent;

        createActions();
        createMenu();

        addView();

        initialize();
    }

    /**
     * @see org.eclipse.ui.IWorkbenchPart#setFocus()
     */
    public void setFocus() {
    }

    protected Composite addColumn() {
        Composite contentPane = new Composite(parentComposite, SWT.NO_FOCUS);
        contentPane.setLayoutData(new GridData(GridData.FILL_BOTH));

        columnContents.add(gridLayout.numColumns, contentPane);

        gridLayout.numColumns++;

        return contentPane;

    }

    protected abstract void addView();

    protected abstract void initialize();

    private void remove() {
        if (gridLayout.numColumns == 1)
            return;

        gridLayout.numColumns--;

        Composite contentPane = (Composite) columnContents.remove(gridLayout.numColumns);
        contentPane.dispose();

        parentComposite.layout(true);
    }

    public int getColumnCount() {
        return gridLayout.numColumns;
    }

    private void createActions() {
        addColumnAction = new Action("Add Duplicate") {
            public void run() {
                addView();
                parentComposite.layout(true);
            }
        };
        addColumnAction.setImageDescriptor(ImageDescriptor.createFromFile(Icon.class, "plus.gif"));
        addColumnAction.setToolTipText("Add Duplicate");

        removeColumnAction = new Action("Remove Duplicate") {
            public void run() {
                remove();
            }
        };
        removeColumnAction.setImageDescriptor(ImageDescriptor.createFromFile(Icon.class, "delete.gif"));
        removeColumnAction.setToolTipText("Remove Duplicate");
    }

    private void createMenu() {
        IMenuManager mgr = getViewSite().getActionBars().getMenuManager();
        mgr.add(addColumnAction);
        mgr.add(removeColumnAction);
    }

}