ImpactNwPage.java

package org.openlca.app.editors.lcia_methods;

import java.util.List;
import java.util.Objects;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.ScrolledForm;
import org.eclipse.ui.forms.widgets.Section;
import org.openlca.app.Event;
import org.openlca.app.M;
import org.openlca.app.editors.ModelPage;
import org.openlca.app.util.UI;
import org.openlca.core.model.ImpactMethod;
import org.openlca.core.model.NwSet;

import com.google.common.eventbus.Subscribe;

class ImpactNwPage extends ModelPage<ImpactMethod> {

	private FormToolkit toolkit;
	private NwFactorViewer factorViewer;
	private ImpactMethodEditor editor;
	private NwSetViewer setViewer;
	private ScrolledForm form;

	ImpactNwPage(ImpactMethodEditor editor) {
		super(editor, "ImpactNormalizationWeightingPage",
				M.NormalizationWeighting);
		this.editor = editor;
	}

	@Override
	protected void createFormContent(IManagedForm managedForm) {
		form = UI.formHeader(managedForm);
		updateFormTitle();
		toolkit = managedForm.getToolkit();
		Composite body = UI.formBody(form, toolkit);
		Section section = UI.section(body, toolkit,
				M.NormalizationWeightingSets);
		UI.gridData(section, true, true);
		Composite client = toolkit.createComposite(section);
		section.setClient(client);
		UI.gridLayout(client, 1);
		SashForm sashForm = createSash(client);
		setViewer = createNwSetViewer(section, sashForm);
		factorViewer = new NwFactorViewer(sashForm, editor);
		sashForm.setWeights(new int[] { 25, 75 });
		setViewer.selectFirst();
		body.setFocus();
		form.reflow(true);
		editor.getEventBus().register(this);
		editor.onSaved(() -> updateInput());
	}

	@Override
	protected void updateFormTitle() {
		if (form == null)
			return;
		form.setText(M.ImpactAssessmentMethod + ": " + getModel().getName());
	}

	@Subscribe
	public void refresh(Event event) {
		if (!event.match(editor.IMPACT_CATEGORY_CHANGE))
			return;
		factorViewer.refresh();
	}

	private SashForm createSash(Composite client) {
		SashForm sash = new SashForm(client, SWT.NONE);
		GridData sashGD = new GridData(SWT.FILL, SWT.FILL, true, true);
		sashGD.widthHint = 400;
		sash.setLayoutData(sashGD);
		sash.setLayout(new GridLayout(2, false));
		return sash;
	}

	private NwSetViewer createNwSetViewer(Section section, SashForm sashForm) {
		NwSetViewer viewer = new NwSetViewer(sashForm, editor);
		viewer.bindTo(section);
		viewer.addSelectionChangedListener((selection) ->
				factorViewer.setInput(selection));
		viewer.setInput(getModel());
		return viewer;
	}

	private void updateInput() {
		NwSet newNwSet = findNewNwSet();
		setViewer.setInput(getModel());
		setViewer.select(newNwSet);
	}

	private NwSet findNewNwSet() {
		List<NwSet> list = getModel().getNwSets();
		if (list.isEmpty())
			return null;
		NwSet old = setViewer.getSelected();
		if (old == null)
			return list.get(0);
		for (NwSet set : list) {
			if (Objects.equals(old.getRefId(), set.getRefId()))
				return set;
		}
		return list.get(0);
	}
}