r/org.eclipse.statet.r.ui/src/org/eclipse/statet/internal/r/ui/wizards/RPkgProjectWizardPage.java

/*=============================================================================#
 # Copyright (c) 2011, 2018 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.ui.wizards;

import org.eclipse.core.databinding.Binding;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.jface.databinding.swt.WidgetProperties;
import org.eclipse.jface.databinding.wizard.WizardPageSupport;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import org.eclipse.statet.ecommons.databinding.core.util.DirtyTracker;
import org.eclipse.statet.ecommons.ui.util.LayoutUtil;

import org.eclipse.statet.r.core.rlang.RPkgNameValidator;


public class RPkgProjectWizardPage extends WizardPage {
	
	
	private final NewRProjectWizardPage projectPage;
	
	private Text pkgNameControl;
	
	private DataBindingContext dbc;
	private IObservableValue<String> pkgNameValue;
	
	private boolean wasVisible;
	private DirtyTracker pkgUserChanged;
	
	
	public RPkgProjectWizardPage(final NewRProjectWizardPage projectPage) {
		super("RPkgWizardPage"); //$NON-NLS-1$
		
		setTitle(Messages.RPkgWizardPage_title);
		setDescription(Messages.RPkgWizardPage_description);
		
		this.projectPage= projectPage;
	}
	
	
	@Override
	public void createControl(final Composite parent) {
		initializeDialogUnits(parent);
		
		final Composite composite= new Composite(parent, SWT.NONE);
		composite.setLayout(LayoutUtil.createContentGrid(1));
		
		{	final Composite group= createRPkgGroup(composite);
			group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
		}
		
		Dialog.applyDialogFont(composite);
		setControl(composite);
		
		final Realm realm= Realm.getDefault();
		this.dbc= new DataBindingContext(realm);
		addBindings(this.dbc, realm);
		WizardPageSupport.create(this, this.dbc);
	}
	
	protected Composite createRPkgGroup(final Composite parent) {
		final Group composite= new Group(parent, SWT.NONE);
		composite.setLayout(LayoutUtil.createGroupGrid(2));
		composite.setText("R Package");
		
		final Label label= new Label(composite, SWT.NONE);
		label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
		label.setText("Package Name: ");
		
		this.pkgNameControl= new Text(composite, SWT.LEFT | SWT.BORDER);
		this.pkgNameControl.setFont(JFaceResources.getTextFont());
		this.pkgNameControl.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
		
		return composite;
	}
	
	protected void addBindings(final DataBindingContext dbc, final Realm realm) {
		this.pkgNameValue= new WritableValue<>(realm, "", String.class); //$NON-NLS-1$
		
		this.pkgUserChanged= new DirtyTracker();
		
		final Binding binding= dbc.bindValue(
				WidgetProperties.text(SWT.Modify).observe(this.pkgNameControl),
				this.pkgNameValue,
				new UpdateValueStrategy().setAfterGetValidator(new RPkgNameValidator()),
				null );
		this.pkgUserChanged.add(binding);
	}
	
	@Override
	public void setVisible(final boolean visible) {
		super.setVisible(visible);
		if (visible) {
			final boolean firstTime= !this.wasVisible;
			this.wasVisible= true;
			
			if (!this.pkgUserChanged.isDirty() && this.projectPage != null) {
				this.pkgNameControl.setText(this.projectPage.getProjectName());
				this.pkgUserChanged.resetDirty();
			}
			if (firstTime) {
				setMessage(null);
				setErrorMessage(null);
			}
		}
	}
	
	
	public String getPkgName() {
		return this.pkgNameValue.getValue();
	}
	
}