de.yarkon.gwt.eventcalendar.client.EventCalendar.java Source code

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Here is the source code for de.yarkon.gwt.eventcalendar.client.EventCalendar.java

Source

/*
 * Copyright 2010 Thomas Oberndrfer
 * Licensed under the GNU General Public License v3 or any later version
 * See license text at http://www.gnu.org/licenses/gpl.txt
*/
package de.yarkon.gwt.eventcalendar.client;

import java.util.Date;
//import java.util.logging.Level;
//import java.util.logging.Logger;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.logical.shared.BeforeSelectionEvent;
import com.google.gwt.event.logical.shared.BeforeSelectionHandler;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.StackLayoutPanel;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class EventCalendar implements EntryPoint {

    interface MyResources extends ClientBundle {
        public static final MyResources INSTANCE = GWT.create(MyResources.class);

        @CssResource.NotStrict
        @Source("EventCalendar.css")
        public CssResource css();
    }

    private StackLayoutPanel panel;
    private EventCalendarModel dataModel = EventCalendarModel.getInstance();

    // private Logger logger = Logger.getLogger("EventCalendar");

    private final int NUMBER_OF_MONTHS = 12;
    private final int SHOW_PAST_MONTHS = 2;
    private int currentMonth;
    private int firstMonth;
    private int firstYear;

    @SuppressWarnings("deprecation")
    public EventCalendar() {
        super();
        assert SHOW_PAST_MONTHS <= 12;
        Date date = new Date();
        /*
         * only interested in year and month, for safety reason (timezones) set
         * day to 10
         */
        date.setDate(10);
        currentMonth = date.getMonth();
        // logger.log(Level.SEVERE, Integer.toString(currentMonth));
        if (currentMonth >= SHOW_PAST_MONTHS) {
            date.setMonth(currentMonth - SHOW_PAST_MONTHS);
        } else {
            date.setMonth(currentMonth - SHOW_PAST_MONTHS + 12);
            date.setYear(date.getYear() - 1);
        }
        firstMonth = date.getMonth();
        firstYear = date.getYear();
    }

    /**
     * This is the entry point method.
     */
    public void onModuleLoad() {
        // Inject the contents of the CSS file
        MyResources.INSTANCE.css().ensureInjected();

        // Create a three-item stack, with headers sized in EMs.
        initStackPanel();

        /*
         * Attach the LayoutPanel to the RootLayoutPanel. The latter will listen
         * for resize events on the window to ensure that its children are
         * informed of possible size changes.
         */
        RootLayoutPanel rp = RootLayoutPanel.get();
        rp.add(panel);
    }

    @SuppressWarnings("deprecation")
    private void initStackPanel() {
        panel = new StackLayoutPanel(Unit.EM);
        EventTable table;
        Date date = new Date(firstYear, firstMonth, 10);
        DateTimeFormat dateFormatMonth = DateTimeFormat.getFormat(DateTimeFormat.PredefinedFormat.MONTH);
        DateTimeFormat dateFormatYear = DateTimeFormat.getFormat(DateTimeFormat.PredefinedFormat.YEAR_MONTH);
        String header;
        // create number_of_months stacks
        for (int i = 0; i < NUMBER_OF_MONTHS; i++) {
            // Create a new table widget for the event list
            int newMonth = (firstMonth + i) % 12;
            date.setMonth(newMonth);
            if (newMonth == 0 && i != 0) {
                date.setYear(date.getYear() + 1);
            }
            if (newMonth == 0 || i == 0) {
                header = dateFormatYear.format(date);
            } else {
                header = dateFormatMonth.format(date);
            }
            table = new EventTable((Date) date.clone());
            ScrollPanel scrollPanel = new ScrollPanel(table);
            scrollPanel.addStyleName("scrollPanel");
            panel.add(scrollPanel, header, 2);
        }

        /*
         * show current month, SHOW_PAST_MONTHS luckily is the index of the
         * current month
         */
        panel.showWidget(SHOW_PAST_MONTHS, true);
        // event handler to fill table with data on selection
        panel.addBeforeSelectionHandler(new BeforeSelectionHandler<Integer>() {
            @Override
            public void onBeforeSelection(BeforeSelectionEvent<Integer> event) {
                ScrollPanel scrollPanel = (ScrollPanel) panel.getWidget(event.getItem());
                EventTable tableWidget = (EventTable) scrollPanel.getWidget();
                if (tableWidget.isTableFilled() == false) {
                    // logger.log(Level.SEVERE, "Header Height:" +
                    // Integer.toString(panel.getVisibleWidget().getOffsetHeight()));
                    dataModel.getEventList(tableWidget.getMonth(), tableWidget);
                    tableWidget.setFocus(true);
                }
            }
        });
        // fire event to load data for current month
        BeforeSelectionEvent.fire(panel, SHOW_PAST_MONTHS);
    }

}