# OpenLink Virtuoso Universal Server: Documentation - calendar

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Virtuoso Functions Guide

## calendar

Databound calendar control.
< calendar name (required) annotation (optional) initial-enable (optional) enabled (optional) instantiate (optional) control-udt (optional) xsd-stub-xhtml (optional) width (optional) height (optional) initial-date (optional) debug-srcfile (optional) debug-srcline (optional) debug-log (optional) />
Description

This is the generic calendar control.

Attributes
name = SqlName

A page level unique name identifying a control.

annotation

A human readable comment.

initial-enable = CalculateableValue

Determines whether a control is initially visible. True by default. Could be data-bound to an SQL expression.

enabled = CalculateableValue

Determines whether a control is visible. True by default. Could be data-bound to an SQL expression.

instantiate = CalculateableValue

Determines whether a control instantiate its children. It is true by default. It could be data-bound to an SQL expression. Unlike most of calcucateable attributes, the value of this attribute for a control is calcluated before calling 'on-init' event handler of the control; other values are calculated before calling 'before-data-bind' event handler.

control-udt = SqlName

At run time every control is represented as an instance of some user-defined type (UDT). VSPX compiles selects the UDT to use depending on name of the XML element that represents the control and maybe some of its attributes. In some specific cases the application developer may instruct VSPX compiler to use some other UDT, e.g. an application-specific UDT that is derived from the preset one. If specified, the value of 'control-udt' attribute should be equal to the name of the desired target UDT.

xsd-stub-xhtml

This attribute is for internal use only. It has no effect if added to the source VSPX file.

width

Visible width of the control when it is displayed in WYSIWYG tools when the source VSPX text is edited. The value of this attribute will not be used when the resulting HTML is rendered.

height

Visible width of the control when it is displayed in WYSIWYG tools when the source VSPX text is edited. The value of this attribute will not be used when the resulting HTML is rendered.

initial-date = CalculateableValue

Expression which returns a date for setting initially the current date of the calendar.

debug-srcfile

URI of the source document where the tag comes from.

debug-srcline

Line number in the source document where the tag comes from.

debug-log

This defines what sort of data are saved to the debugging log.

Declaration of type vspx_calendar

    create type vspx_calendar under vspx_control as
    (
      cal_date date,
      cal_meta any,
      cal_selected datetime,
      cal_current_row vspx_row_template
    ) temporary self as ref
    method vc_get_date_array () returns any,
    overriding method vc_view_state (stream any, n int) returns any,
    overriding method vc_set_view_state (e vspx_event) returns any,
    constructor method vspx_calendar (name varchar, parent vspx_control)

Examples
A calendar

<?xml version="1.0"?> <!-- - - $Id: calendar__0.vspx,v 1.2 2006/08/16 00:04:15 source Exp $ - - This file is part of the OpenLink Software Virtuoso Open-Source (VOS) - project. - - Copyright (C) 1998-2006 OpenLink Software - - This project 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; only version 2 of the License, dated June 1991. - - 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., - 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - This demo will show a calendar allowing to list dates by months

    <v:page name="pagecal1" xmlns:v="http://www.openlinksw.com/vspx/">
    <html>
    <body>
    <v:form name="form1" type="simple" method="POST" >
        <v:calendar name="cal1" initial-date="--now()">
          <v:template type="simple" name="chead1" name-to-remove="table" set-to-remove="bottom">
          <table border="0" cellpadding="0" cellspacing="0">
            <tr>
             <td align="center">
    	  <v:button name="pmon" value="<" action="simple" style="url">
    	    <v:on-post>
    	    self.cal1.cal_date := dateadd ('month', -1, self.cal1.cal_date);
    	    self.cal1.vc_data_bind (e);
    	    </v:on-post>
    	  </v:button>
    	 </td>
     	 <td colspan="5" align="center">
               <?V monthname((control.vc_parent as vspx_calendar).cal_date) ?>
    	   <?V year((control.vc_parent as vspx_calendar).cal_date) ?>
    	 </td>
             <td align="center">
    	  <v:button name="nmon" value=">" action="simple" style="url">
    	    <v:on-post>
    	    self.cal1.cal_date := dateadd ('month', 1, self.cal1.cal_date);
    	    self.cal1.vc_data_bind (e);
    	    </v:on-post>
    	  </v:button>
    	 </td>
    	 </tr>
            <tr><td>Sun</td><td>|Mon</td><td>|Tue</td><td>|Wed</td><td>|Thu</td><td>|Fri</td><td>|Sat</td></tr>
          </table>
          </v:template>
          <v:template type="repeat" name="cbody1" name-to-remove="" set-to-remove="">
          <v:template type="browse" name="crow1" name-to-remove="table" set-to-remove="both">
          <table>
          <tr>
           <td align="center"><v:button style="url" action="simple" name="b1" value="--cal_icell(control, 0)" /></td>
           <td align="center"><v:button style="url" action="simple" name="b2" value="--cal_icell(control, 1)" /></td>
           <td align="center"><v:button style="url" action="simple" name="b3" value="--cal_icell(control, 2)" /></td>
           <td align="center"><v:button style="url" action="simple" name="b4" value="--cal_icell(control, 3)" /></td>
           <td align="center"><v:button style="url" action="simple" name="b5" value="--cal_icell(control, 4)" /></td>
           <td align="center"><v:button style="url" action="simple" name="b6" value="--cal_icell(control, 5)" /></td>
           <td align="center"><v:button style="url" action="simple" name="b7" value="--cal_icell(control, 6)" /></td>
          </tr>
          </table>
          </v:template>
          </v:template>
          <v:template type="simple" name="cbott1" name-to-remove="table" set-to-remove="top">
          <table>
          </table>
          </v:template>
        </v:calendar>
    </v:form>
    </body>
    </html>
    </v:page>