Below is a modified version of the DateSelector class that adds two more
constructors to allow you to specify the range of years given in the
selector. I hope its ok as I'm not the hottest java coder :-)
Sorry its not a diff - I'm still figuring this stuff out.
Regards,
Jon North
package org.apache.turbine.util;
/*
* Copyright (c) 1997-2000 The Java Apache Project. All rights reserved.
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* Project for use in the Apache JServ servlet engine project
* <http://java.apache.org/>."
*
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// Java Core Classes
import java.util.*;
import java.text.*;
// ECS stuff.
import org.apache.ecs.html.*;
import org.apache.ecs.*;
/**
* DateSelector is a utility class to handle the creation of a set of
* date popup menus. The code is broken into a set of static methods
* for quick and easy access to the individual select objects:
*
* <pre>
* ElementContainer ec dateSelect = new ElementContainer();
* String myName = "mydate";
* ec.addElement(DateSelector.getMonthSelector(myName));
* ec.addElement(DateSelector.getDaySelector(myName));
* ec.addElement(DateSelector.getYearSelector(myName));
* </pre>
*
* There are also methods which will use attributes to build a
* complete month,day,year selector:
*
* <pre>
* DateSelector ds = new DateSelector(myName);
* dateSelect = ds.ecsOutput();
* </pre>
*
* The above element container would use the onChange setting and may
* hide the selected day if set via showDays().<br>
*
* @author <a href="mailto:[EMAIL PROTECTED]">Jeffrey D. Brekke</a>
* @author <a href="mailto:[EMAIL PROTECTED]">Jon S. Stevens</a>
* @author <a href="mailto:[EMAIL PROTECTED]">Leon Atkinson</a>
* @author <a href="mailto:[EMAIL PROTECTED]">Jon North</a>
* @version $Id: DateSelector.java,v 1.3 2000/09/01 22:11:27 gonzalo Exp $
*/
public class DateSelector
{
/** Prefix for date names. */
public static final String DEFAULT_PREFIX = "DateSelector";
/** Suffix for day parameter. */
public static final String DAY_SUFFIX = "_day";
/** Suffix for month parameter. */
public static final String MONTH_SUFFIX = "_month";
/** Suffix for year parameter. */
public static final String YEAR_SUFFIX = "_year";
private Calendar useDate = null;
private String selName = null;
private static final String[] monthName =
new DateFormatSymbols().getMonths();
private String onChange = null;
private boolean onChangeSet = false;
private boolean showDays = true;
private int setDay = 0;
private static int yearsAfter = 5;
private static int yearsBefore = 5;
/**
* Constructor defaults to current date and uses the default
* prefix: <pre>DateSelector.DEFAULT</pre>
*/
public DateSelector( )
{
this.selName = DEFAULT_PREFIX;
this.useDate = Calendar.getInstance();
this.useDate.setTime ( new Date() );
}
/**
* Constructor, uses the date set in a calendar that has been
* already passed in (with the date set correctly).
*
* @param selName A String with the selector name.
* @param useDate A Calendar with a date.
*/
public DateSelector( String selName, Calendar useDate )
{
this.useDate = useDate;
this.selName = selName;
}
/**
* Constructor, uses the date set in a calendar that has been
* already passed in (with the date set correctly).
*
* @param selName A String with the selector name.
* @param useDate A Calendar with a date.
* @param yearsBefore Number of years prior to useDate to show in
selector
* @param yearsAfter Number of years after useDate to show in selector
*/
public DateSelector( String selName, Calendar useDate, int yearsBefore,
int yearsAfter )
{
this.useDate = useDate;
this.selName = selName;
if (yearsBefore < 0) yearsBefore = 0;
this.yearsBefore = yearsBefore;
if (yearsAfter < 0) yearsAfter = 0;
this.yearsAfter = yearsAfter ;
}
/**
* Constructor defaults to current date.
*
* @param selName A String with the selector name.
* @param yearsBefore Number of years prior to useDate to show in
selector
* @param yearsAfter Number of years after useDate to show in selector
*/
public DateSelector( String selName, int yearsBefore, int yearsAfter )
{
this.selName = selName;
this.useDate = Calendar.getInstance();
this.useDate.setTime ( new Date() );
if (yearsBefore < 0) yearsBefore = 0;
this.yearsBefore = yearsBefore;
if (yearsAfter < 0) yearsAfter = 0;
this.yearsAfter = yearsAfter;
}
/**
* Constructor defaults to current date.
*
* @param selName A String with the selector name.
*/
public DateSelector( String selName )
{
this.selName = selName;
this.useDate = Calendar.getInstance();
this.useDate.setTime ( new Date() );
}
/**
* Adds the onChange to all of <SELECT> tags. This is limited to
* one function for all three popups and is only used when the
* output() methods are used. Individual getMonth, getDay,
* getYear static methods will not use this setting.
*
* @param string A String to use for onChange attribute. If null,
* then nothing will be set.
* @return A DateSelector (self).
*/
public DateSelector setOnChange ( String onChange )
{
if (onChange != null)
{
this.onChange = onChange;
this.onChangeSet = true;
}
else
{
this.onChange = null;
this.onChangeSet = false;
}
return this;
}
/**
* Select the day to be selected if the showDays(false) behavior
* is used. Individual getMonth, getDay, getYear static methods
* will not use this setting.
*
* @param day The day.
* @return A DateSelector (self).
*/
public DateSelector setDay( int day )
{
this.setDay = day;
this.showDays = false;
return this;
}
/**
* Whether or not to show the days as a popup menu. The days will
* be a hidden parameter and the value set with setDay is used.
* Individual getMonth, getDay, getYear static methods will not
* use this setting.
*
* @param show True if the day should be shown.
* @return A DateSelector (self).
*/
public DateSelector setShowDay ( boolean show )
{
this.showDays = false;
return this;
}
/**
* Set the selector name prefix. Individual getMonth, getDay,
* getYear static methods will not use this setting.
*
* @param selname A String with the select name prefix.
*/
public void setSelName( String selName )
{
this.selName = selName;
}
/**
* Get the selector name prefix.
*
* @return A String with the select name prefix.
*/
public String getSelName()
{
return selName;
}
/**
* Return a month selector.
*
* @param name The name to use for the selected month.
* @return A select object with all the months.
*/
public static Select getMonthSelector(String name)
{
return(getMonthSelector(name, Calendar.getInstance()));
}
/**
* Return a month selector.
*
* Note: The values of the month placed into the select list are
* the month integers starting at 0 (ie: if the user selects
* February, the selected value will be 1).
*
* @param name The name to use for the selected month.
* @param now Calendar to start with.
* @return A select object with all the months.
*/
public static Select getMonthSelector(String name,
Calendar now)
{
Select monthSelect = new Select().setName(name);
for (int curMonth = 0;curMonth <= 11; curMonth++)
{
Option o = new Option();
o.addElement(monthName[curMonth]);
o.setValue(curMonth);
if ((now.get(Calendar.MONTH)) == curMonth)
{
o.setSelected(true);
}
monthSelect.addElement(o);
}
return(monthSelect);
}
/**
* Return a day selector.
*
* @param name The name to use for the selected day.
* @return A select object with all the days in a month.
*/
public static Select getDaySelector(String name)
{
return(getDaySelector(name, Calendar.getInstance()));
}
/**
* Return a day selector.
*
* @param name The name to use for the selected day.
* @param now Calendar to start with.
* @return A select object with all the days in a month.
*/
public static Select getDaySelector(String name,
Calendar now)
{
Select daySelect = new Select().setName(name);
for(int currentDay=1; currentDay <= 31; currentDay++)
{
Option o = new Option();
o.addElement(Integer.toString(currentDay));
o.setValue(currentDay);
if (now.get(Calendar.DAY_OF_MONTH) == currentDay)
{
o.setSelected(true);
}
daySelect.addElement(o);
}
return(daySelect);
}
/**
* Return a year selector.
*
* @param name The name to use for the selected year.
* @return A select object with all the years starting five years
* from now and five years before this year.
*/
public static Select getYearSelector(String name)
{
return(getYearSelector(name, Calendar.getInstance()));
}
/**
* Return a year selector.
*
* @param name The name to use for the selected year.
* @param now Calendar to start with.
* @return A select object with all the years starting yearsAfter years
* from now and yearsBefore years before this year.
*/
public static Select getYearSelector(String name,
Calendar now)
{
Select yearSelect = new Select().setName(name);
int startYear = now.get(Calendar.YEAR);
for(int currentYear = startYear - yearsBefore;
currentYear <= startYear + yearsAfter;
currentYear++)
{
Option o = new Option();
o.addElement(Integer.toString(currentYear));
o.setValue(currentYear);
if (startYear == currentYear)
{
o.setSelected(true);
}
yearSelect.addElement(o);
}
return(yearSelect);
}
/**
* Used to build the popupmenu in HTML. The properties set in the
* object are used to generate the correct HTML. The selName
* attribute is used to seed the names of the select lists. The
* names will be generated as follows:
*
* <ul>
* <li>selName + "_month"</li>
* <li>selName + "_day"</li>
* <li>selName + "_year"</li>
* </ul>
*
* If onChange was set it is also used in the generation of the
* output. The output HTML will list the select lists in the
* following order: month day year.
*
* @return A String with the correct HTML for the date selector.
*/
public String output()
{
return(ecsOutput().toString());
}
/**
* Used to build the popupmenu in HTML. The properties set in the
* object are used to generate the correct HTML. The selName
* attribute is used to seed the names of the select lists. The
* names will be generated as follows:
*
* <ul>
* <li>selName + "_month"</li>
* <li>selName + "_day"</li>
* <li>selName + "_year"</li>
* </ul>
*
* The output HTML will list the select lists in the following
* order: month day year.
*
* @return A String with the correct HTML for the date selector.
*/
public String toString()
{
return(ecsOutput().toString());
}
/*
* Return an ECS container with the month, day, and year select
* objects inside.
*
* @return An ECS container.
*/
public ElementContainer ecsOutput()
{
if ( this.useDate == null )
{
this.useDate.setTime ( new Date() );
}
Select monthSelect = getMonthSelector(selName + MONTH_SUFFIX,
useDate);
ConcreteElement daySelect = null;
if (!showDays)
{
daySelect = new Input(Input.hidden,
selName + DAY_SUFFIX,
setDay);
}
else
{
Select tmp = getDaySelector(selName + DAY_SUFFIX, useDate);
if (onChangeSet)
tmp.setOnChange(onChange);
daySelect = tmp;
}
Select yearSelect = getYearSelector(selName + YEAR_SUFFIX, useDate);
if (onChangeSet)
{
monthSelect.setOnChange(onChange);
yearSelect.setOnChange(onChange);
}
ElementContainer ec = new ElementContainer();
ec.addElement(new Comment("== BEGIN
org.apache.turbine.util.DateSelector.ecsOutput() =="));
ec.addElement(monthSelect);
ec.addElement(daySelect);
ec.addElement(yearSelect);
ec.addElement(new Comment("== END
org.apache.turbine.util.DateSelector.ecsOutput() =="));
return (ec);
}
}
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