c6_contexthierarchy.parts.ShowDataFromContextPart.java Source code

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Here is the source code for c6_contexthierarchy.parts.ShowDataFromContextPart.java

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/*******************************************************************************
 * Copyright (c) 2010 - 2013 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Lars Vogel <lars.Vogel@gmail.com> - Bug 419770
 *******************************************************************************/
package c6_contexthierarchy.parts;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.ui.di.Focus;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.model.application.ui.basic.MWindow;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

import c6_contexthierarchy.parts.model.Person;

public class ShowDataFromContextPart {

    private Label nameLabel;
    private Text nameInput;

    @Inject
    private MWindow window;

    @Inject
    private MPart part;

    @Inject
    private Shell shell;

    @Inject
    private MApplication application;

    @PostConstruct
    public void createComposite(Composite parent) {
        parent.setLayout(new GridLayout(2, false));

        /* name */
        nameLabel = new Label(parent, SWT.NONE);
        nameLabel.setText("Name:");
        GridData gridData = new GridData();
        gridData.horizontalAlignment = GridData.BEGINNING;
        gridData.grabExcessHorizontalSpace = false;
        nameLabel.setLayoutData(gridData);

        nameInput = new Text(parent, SWT.BORDER);
        nameInput.setEditable(false);
        gridData = new GridData();
        gridData.horizontalAlignment = GridData.FILL;
        gridData.grabExcessHorizontalSpace = true;
        nameInput.setLayoutData(gridData);

        Button loadDataFromWorkbenchBtn = new Button(parent, SWT.NONE);
        loadDataFromWorkbenchBtn.setText("Load data from workbench");
        loadDataFromWorkbenchBtn.addSelectionListener(new DisplayPerson(this, ContextSource.WORKBENCH));
        gridData = new GridData();
        gridData.horizontalSpan = 2;
        gridData.horizontalAlignment = GridData.FILL;
        gridData.grabExcessHorizontalSpace = true;
        loadDataFromWorkbenchBtn.setLayoutData(gridData);

        Button loadDataFromWindowBtn = new Button(parent, SWT.NONE);
        loadDataFromWindowBtn.setText("Load data from window");
        loadDataFromWindowBtn.addSelectionListener(new DisplayPerson(this, ContextSource.WINDOW));
        gridData = new GridData();
        gridData.horizontalSpan = 2;
        gridData.horizontalAlignment = GridData.FILL;
        gridData.grabExcessHorizontalSpace = true;
        loadDataFromWindowBtn.setLayoutData(gridData);

        Button loadDataFromPartBtn = new Button(parent, SWT.NONE);
        loadDataFromPartBtn.setText("Load data from part");
        loadDataFromPartBtn.addSelectionListener(new DisplayPerson(this, ContextSource.PART));
        gridData = new GridData();
        gridData.horizontalSpan = 2;
        gridData.horizontalAlignment = GridData.FILL;
        gridData.grabExcessHorizontalSpace = true;
        loadDataFromPartBtn.setLayoutData(gridData);
    }

    @Focus
    public void setFocus() {
        nameInput.setFocus();
    }

    public void refreshData(ContextSource contextSource) {

        IEclipseContext ctx = null;
        switch (contextSource) {
        case PART:
            ctx = part.getContext();
            break;
        case WINDOW:
            ctx = window.getContext();
            break;
        case WORKBENCH:
            ctx = application.getContext();
            break;
        default:
            MessageDialog.openWarning(shell, "Invalid context", "Invalid context found:" + contextSource);
            return;

        }
        Person p = ctx.get(Person.class);
        if (p == null) {
            MessageDialog.openWarning(shell, "No Person for perspective",
                    "No person for current perspective found");
            return;
        }
        nameInput.setText(p.getName());
    }

    class DisplayPerson extends SelectionAdapter {
        private ShowDataFromContextPart part;
        private ContextSource contextSource;

        public DisplayPerson(ShowDataFromContextPart part, ContextSource contextSource) {
            this.part = part;
            this.contextSource = contextSource;
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            part.refreshData(this.contextSource);
        }
    }
}