JS控制日历控件选择时间范围

日期控件名称设置为myDatePrompt

JS代码:

<!-- This div is used to show the user the highest value they can choose in the prompt. -->

<div id="warningMessage_THIS_">

</div>

<script>

/*

 *

 * A hidden date value prompt returns the latest date from the database.

 * We get the values from a hidden date value prompt and compare it with value selected in the Date prompt control.

 * If the value is the Date prompt control is less than or equal to the hidden date value prompt value the Finish button will activate.

 * If the value is greater a warning message is displayed and the Finish button is inactive.

 *

 * The interesting part of this script is the use of prompt.getValues(True) which allows the script to

 * access all of the values in the hidden prompt regardless of user selection. Without this, the script could

 * not get the prompt value.

 *

 */

 /*

  *

  * Attach functions to an arbitrarily named object to mimic a namespace to ensure the name uniqueness

  *

  */

 var acme = {};

 /*

  *

  * This function checks to see what date value is greater

  *

  * Function arguments:

  *  @values is the array of values from the Date prompt the user uses to select values.

  *

  */

 acme.dateValidation = function(values){

  var dateValue = acme.rawDateToJSONSimple(values[0]['use']);

  var maxValue = acme.maxDateFetch();

  var promptDate = new Date(dateValue.y, dateValue.m, dateValue.d);

  var maxDate = new Date(maxValue.y, maxValue.m, maxValue.d);

  var result = promptDate.getTime() <= maxDate.getTime() ? true: false;

  var messageDiv = document.getElementById("warningMessage_THIS_");

  if (result) {

   messageDiv.innerHTML = "<span style='color: LightGrey; font-size: 12pt'>The largest permissible date value is: "  +  maxValue.y + "-" + maxValue.m + "-" + maxValue.d + ". </span>";

  } else {

   messageDiv.innerHTML = "<span style='color: LightCoral; font-size: 12pt'>The largest permissible date value is:  "  +  maxValue.y + "-" + maxValue.m + "-" + maxValue.d + ". Please select a lower date.</span>";

  } 

  return result;

 };

 /*

  *

  * This function gets the Date prompt and calls the validation function

  *

  *

  */

 acme.connectdateValidation = function(){

  var datePrompt = acme.getControl("myDatePrompt");

  datePrompt.setValidator(acme.dateValidation);

 };

 /*

  *

  * This function sets the latest date value from the hidden date value prompt to the parameter

  *

  *

  */

 acme.setDefaultMaxDate = function(){

  var maxDatePrompt = acme.getControl("myMaxDateHiddenPrompt");

  var values = maxDatePrompt.getValues(true);

  maxDatePrompt.setValues([values[0]]);

 };

 /*

  *

  * This function takes the JSON (string) date and breaks it apart into JSON representation of Year (y) Month (m) and Day (d)

  *

  * Function arguments:

  * @value is a date value in the format 2012-12-31T00:00:00.000000000

  *

  */

 acme.rawDateToJSONSimple = function(value){

  var timeRe = new RegExp("(....)-(.+)-(.+)T");

  var myDateParts = value.match(timeRe);

  var result = {

   "y":myDateParts[1],

   "m":myDateParts[2],

   "d":myDateParts[3]

  };

  return result;

 };

 /*

  *

  * This function gets the latest date value from the hidden date value prompt

  *

  */

 acme.maxDateFetch = function(){

  var maxDatePrompt = acme.getControl("myMaxDateHiddenPrompt");

  var values = maxDatePrompt.getValues(true);

  var rawResult;

  var result ;

  if (values.length == 1) {

   result = acme.rawDateToJSONSimple(values[0]['use']);

  }

  return (result);

 };

 /*

  *

  * This function gets the control by name from the report

  *

  */

 acme.getControl = function(promptName) {

  var oCR = cognos.Report.getReport("_THIS_");

  return oCR.prompt.getControlByName(promptName);

 };

 // Script execution starts here

 // Call the function to validate the default date prompt value

 acme.connectdateValidation();

 // Call the function to get the largest date from the hidden prompt

 acme.setDefaultMaxDate ();

</script>

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