edu.nrao.dss.client.util.dssgwtcal.DayViewHeader.java Source code

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Here is the source code for edu.nrao.dss.client.util.dssgwtcal.DayViewHeader.java

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// Copyright (C) 2011 Associated Universities, Inc. Washington DC, USA.
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// This program 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
// General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
// 
// Correspondence concerning GBT software should be addressed as follows:
//       GBT Operations
//       National Radio Astronomy Observatory
//       P. O. Box 2
//       Green Bank, WV 24944-0002 USA

package edu.nrao.dss.client.util.dssgwtcal;

import edu.nrao.dss.client.util.dssgwtcal.util.TimeUtils;
import edu.nrao.dss.client.util.dssgwtcal.util.WindowUtils;
import java.util.Date;

import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.Label;

// This class is responsible for the top of the calendar that looks like this:
// | 2011 | Mon, May 2 | Tue, May 3 |
// A FlexTable is resonsible for the overall layout, with the dates (Mon, May 2, ...) being handled
// by an AbsoluteLabel with a Label for each date.

public class DayViewHeader extends Composite {
    private FlexTable header = new FlexTable();
    private AbsolutePanel dayPanel = new AbsolutePanel();
    private AbsolutePanel splitter = new AbsolutePanel();
    private HasSettings settings = null;
    private static final String GWT_CALENDAR_HEADER_STYLE = "gwt-calendar-header";
    private static final String DAY_CELL_CONTAINER_STYLE = "day-cell-container";
    private static final String YEAR_CELL_STYLE = "year-cell";
    private static final String SPLITTER_STYLE = "splitter";

    public static final String[] DAY_LIST = new String[] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
    public static final String[] MONTH_LIST = new String[] { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
            "Sep", "Oct", "Nov", "Dec" };

    private TimeUtils tu;

    public DayViewHeader(HasSettings settings) {
        this.settings = settings;
        tu = new TimeUtils();

        initWidget(header);
        header.setStyleName(GWT_CALENDAR_HEADER_STYLE);
        dayPanel.setStyleName(DAY_CELL_CONTAINER_STYLE);

        header.insertRow(0);
        header.insertRow(0);
        header.insertCell(0, 0);
        header.insertCell(0, 0);
        header.insertCell(0, 0);
        header.setWidget(0, 1, dayPanel);
        header.getCellFormatter().setStyleName(0, 0, YEAR_CELL_STYLE);
        header.getCellFormatter().setWidth(0, 2, WindowUtils.getScrollBarWidth(true) + "px");

        header.getFlexCellFormatter().setColSpan(1, 0, 3);
        header.setCellPadding(0);
        header.setBorderWidth(0);
        header.setCellSpacing(0);

        splitter.setStylePrimaryName(SPLITTER_STYLE);
        header.setWidget(1, 0, splitter);
    }

    // For each day, creates a label w/ text like "Mon, May 2";
    // the label get it's DOM's left attribute set properly
    // and that label gets added to dayPanel
    public void setDays(Date date, int days) {

        dayPanel.clear();
        float dayWidth = 100f / days;
        float dayLeft = 0f;

        for (int i = 0; i < days; i++) {

            // increment the date by 1
            if (i > 0)
                date.setDate(date.getDate() + 1);

            // set the left position of the day splitter to
            // the width * incremented value
            dayLeft = dayWidth * i;

            String headerTitle = DAY_LIST[date.getDay()] + ", " + MONTH_LIST[date.getMonth()] + " "
                    + date.getDate();
            if (tu.isDSTBoundary(date)) {
                // warn users that this Daylight Savings Time starts or ends on this day.
                headerTitle += " (DST)";
            }

            Label dayLabel = new Label();
            //dayLabel.setStylePrimaryName("day-cell");
            dayLabel.setWidth(dayWidth + "%");
            dayLabel.setText(headerTitle);
            // Question: why are we using the DOM here?
            DOM.setStyleAttribute(dayLabel.getElement(), "left", dayLeft + "%");

            // how should this day be displayed?
            String styleName = "day-cell"; //default value
            if (tu.isToday(date)) {
                styleName = "day-cell-today";
            }
            if (tu.isDSTBoundary(date)) {
                // notice how displaying the fact that the day is DST takes
                // precedence over the fact that it is today.
                styleName = "day-cell-dst";
            }
            dayLabel.setStyleName(styleName);

            dayPanel.add(dayLabel);
        }
    }

    public void setYear(Date date) {
        setYear(1900 + date.getYear());
    }

    public void setYear(int year) {
        header.setText(0, 0, String.valueOf(year));
    }

}