fr.amapj.view.views.common.gapviewer.DatePerDateViewer.java Source code

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Here is the source code for fr.amapj.view.views.common.gapviewer.DatePerDateViewer.java

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/*
 *  Copyright 2013-2018 Emmanuel BRUN (contact@amapj.fr)
 * 
 *  This file is part of AmapJ.
 *  
 *  AmapJ is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
    
 *  AmapJ is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with AmapJ.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * 
 */
package fr.amapj.view.views.common.gapviewer;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import com.vaadin.server.FontAwesome;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;

import fr.amapj.common.DateUtils;
import fr.amapj.common.GenericUtils;
import fr.amapj.view.engine.popup.PopupListener;
import fr.amapj.view.engine.tools.BaseUiTools;

/**
 * Permet de crer un bloc permettant de naviguer dans une liste de date 
 * 
 * La liste d'entre doit tre trie dans l'ordre croissant 
 *
 */
public class DatePerDateViewer<T> {

    private SimpleDateFormat df1 = new SimpleDateFormat("EEEEE dd MMMMM yyyy");
    private SimpleDateFormat df2 = new SimpleDateFormat("dd/MM/yy");

    private Label titre;

    private int currentIndex;

    private GenericUtils.ToDate<T> toDate;

    private PopupListener listener;

    private List<T> dates;

    private Button previous;

    private Button next;

    public DatePerDateViewer(List<T> dates, GenericUtils.ToDate<T> toDate, PopupListener listener) {
        this.dates = dates;
        this.toDate = toDate;
        currentIndex = 0;
        this.listener = listener;
    }

    /**
     * @return 
     * 
     */
    public VerticalLayout getComponent() {
        VerticalLayout vl = new VerticalLayout();
        vl.setMargin(false);
        vl.setSpacing(false);
        vl.addStyleName("date-viewer");

        // Bandeau avec les boutons droit / gauche 
        HorizontalLayout hl1 = new HorizontalLayout();
        hl1.setWidth("100%");

        previous = addButton(false, hl1, e -> reculer());

        Label empty = new Label();
        hl1.addComponent(empty);
        hl1.setExpandRatio(empty, 1.0f);

        next = addButton(true, hl1, e -> avancer());

        vl.addComponent(hl1);

        // Bandeau avec la date visualise
        titre = new Label();
        hl1.addStyleName("titre");
        titre.setSizeUndefined();
        vl.addComponent(titre);
        vl.setComponentAlignment(titre, Alignment.MIDDLE_CENTER);

        updateButtonState();

        return vl;

    }

    private void updateButtonState() {
        previous.setEnabled(currentIndex != 0);
        next.setEnabled(currentIndex != dates.size() - 1);

        Date toDisplay = toDate.toDate(dates.get(currentIndex));
        SimpleDateFormat dfx = BaseUiTools.isWidthBelow(480) ? df2 : df1;
        titre.setValue(dfx.format(toDisplay));
    }

    private void avancer() {
        if (currentIndex < dates.size() - 1) {
            currentIndex++;
            updateButtonState();
            listener.onPopupClose();
        }
    }

    private void reculer() {
        if (currentIndex > 0) {
            currentIndex--;
            updateButtonState();
            listener.onPopupClose();
        }
    }

    private Button addButton(boolean toRight, HorizontalLayout layout, ClickListener listener) {
        String str;
        if (toRight) {
            str = "SUIVANT";
        } else {
            str = "PRECEDENT";
        }

        Button b = new Button(str);
        b.addClickListener(listener);

        if (toRight) {
            b.setIcon(FontAwesome.ANGLE_DOUBLE_RIGHT);
            b.addStyleName("icon-align-right");
            b.addStyleName("large");
        } else {
            b.setIcon(FontAwesome.ANGLE_DOUBLE_LEFT);
            b.addStyleName("large");
        }

        b.addStyleName("fleche");

        layout.addComponent(b);

        return b;

    }

    public void updateTitreValue(Date dateDebut, Date dateFin) {

        SimpleDateFormat dfx = BaseUiTools.isWidthBelow(480) ? df2 : df1;
        titre.setValue(dfx.format(dateDebut) + " - " + dfx.format(dateFin));
    }

    public T getDate() {
        return dates.get(currentIndex);
    }

    /**
     * Permet la mise  jour du modle de donnes
     * 
     * Si la mise  jour remet en cause l'index, alors on force celui ci a 0
     * 
     *  Ceci peut arriver si on supprime des dates de la liste alors qu'une personne est en train de s'inscrire 
     */
    public void updateDates(List<T> newDates) {
        Date oldDate = toDate.toDate(dates.get(currentIndex));
        Date newDate = null;
        if (currentIndex < newDates.size()) {
            newDate = toDate.toDate(newDates.get(currentIndex));
        }

        if (DateUtils.equals(oldDate, newDate) == false) {
            currentIndex = 0;
        }
        dates.clear();
        dates.addAll(newDates);
    }

}