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Reports and Dashboards for JS > HTML5 Designer > Designer Events

Designer Events

Information

Since dashboards and reports use the same unified template format - MRT, methods for loading the template and working with data, the word “report” will be used in the documentation text.

To write interactive applications need to respond to changes in the application. The event system is used for this. It is represented in Stimulsoft Report Designer with the following events:

onPrepareVariables

Asynchronous event is called before filling in the variables in the report at the beginning of the report rendering. The event occurs immediately after execution onPrepareVariables event of the StiReport object. The event handler argument “event” is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to PrepareVariables.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. By default, the value is set to false.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.

designer.html

...

designer.onPrepareVariables = (args, callback) => {

args.variables[0].value = "Replace value";

}

...

onBeginProcessData

Asynchronous event is called before requesting the data for the report. The event occurs immediately after execution onBeginProcessData event of the StiReport object. The event handler argument “event” is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to BeginProcessData.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. By default, the value is set to false.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.
command	a string ID for the current command. Can have values "TestConnection" and "ExecuteQuery" to call the command to test a connection and data acquisition respectively.
database	a string name of the current database.
connection	the name of the current connection to a data source, specified in report template.
headers	an array of the query headers.
withCredentials	an argument is used to provide the ability to set a cookies in the query.
connectionString	a connection string to the data source for a report.
dataSource	the name of the current data source, specified in the report template. It is set only for SQL data sources.
queryString	a string with the SQL query to the database for retrieving data. Used only with the command = "ExecuteQuery".
timeout	an argument is used to provide the ability to define the seconds of the query timeout.
parameters	a list of the query parameters.
escapeQueryParameters	a flag is used to provide the ability to use the escaped part of the request. By default, the value is set to true.
pathData	an argument is used to provide the ability to define a path to data file.
tryParseDateTime	a flag is trying to parse data as DateTime.
relationDirection	an argument is used to provide the ability to change the direction of the relation between data sources.
pathSchema	an argument is used to provide the ability to define a path to XSD files.
firstRowIsHeader	a flag is used to provide the ability to use a first row as data header in Excel data source.
collectionName	a string collection name of the OData data source.
separator	a string separator of the CSV data source.
dataType	an argument is used to provide the ability to set the data type of the GIS data source.
codePage	an argument is used to provide the ability to set a code page of the CSV or DBF data source.

designer.html

...

//Replace connection string

designer.onBeginProcessData = (args) => {

if (args.database == "MySQL")

args.connectionString = "new connection string";

}

...

//Add a some data

designer.onBeginProcessData = (args, callback) => {

if (args.database == "MySQL"){

args.preventDefault = true;

var result = {

success: true,

rows: [

["value1", 1, false],

["value2", 1, true],

["value3", 2, false]

columns: [

"Column1_name",

"Column2_name",

"Column3_name"

types:[

"string",

"int",

"boolean"

]

}

// https://github.com/stimulsoft/DataAdapters.JS/

callback(result);

}

...

onEndProcessData

Is called after retrieving data for the report. The event occurs immediately after execution onEndProcessData event of the StiReport object. The event handler argument “event” is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to EndProcessData.
report	a report object StiReport.
command	a string ID for the current command. Can have values "TestConnection" and "ExecuteQuery" to call the command to test a connection and data acquisition respectively.
dataSource	the name of the current data source, specified in the report template. It is set only for SQL data sources.
connection	the name of the current connection to a data source, specified in report template.
database	a string name of the current database.
result	a result dataset in a specific JSON format. It has two collections – columns and rows, with descriptions of columns and rows of data sources.

designer.html

...

designer.onEndProcessData = (args) => {

if (args.command == "ExecuteQuery" && args.dataSource == "Categories")

args.result.rows.push(rowData) ;

// https://github.com/stimulsoft/DataAdapters.JS/

}

...

onCreateReport

Asynchronous event Is called after a new report is created. The event handler argument “event” it is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to CreateReport.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. The default value is false.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.
isWizardUsed	The flag indicates that a new report is created with the help of the master (the true value) or a blank report is created (the false value).

designer.html

...

designer.onCreateReport = function (args) {

var report = args.report;

var database = new Stimulsoft.Report.Dictionary.StiJsonDatabase("DemoData", "http://localhost/Demo.json");

report.dictionary.databases.add(database);

report.dictionary.synchronize();

}

...

onOpenReport

Asynchronous event is called before user click button for opening a report. The event handler argument event is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to OpenReport.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. The default value is true.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.

designer.html

...

//Call custom callback() function for loading template to designer

designer.onOpenReport = (args, callback) => {

args.async = true;

args.report = anotherReport;

callback();

}

...

onOpenedReport

Asynchronous event is called before user click button for opening a report before it is assigned to the designer. The event handler argument event is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to OpenedReport.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. The default value is false.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.

designer.html

...

//Add image to report resource when it has been opening

designer.onOpenedReport = (args, callback) => {

args.async = true;

var xhr = new XMLHttpRequest();

xhr.open('GET', "Url to image");

xhr.onload = function () {

var imageData = xhr.response;

var resource = new Stimulsoft.Report.Dictionary.StiResource("ImageName");

resource.content = imageData;

args.report.dictionary.resources.add(resource);

callback();

};

xhr.send();

}

...

onSaveReport

Asynchronous event is called before saving the report. The event handler argument event is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to SaveReport.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. The default value is true.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.
fileName	a saving file name.
autoSave	a flag is used to use autosave mode. The default value is false.

designer.html

...

//Remove report resources before saving

designer.onSaveReport = (args, callback) => {

var report = args.report.clone();

report.dictionary.resources.clear();

args.report = report;

}

...

onSaveAsReport

Asynchronous event is called before saving the report if user click Save As button. The event handler argument event is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default, the value is set to SaveAsReport.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. The default value is false.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.
fileName	a saving file name.
autoSave	a flag is used to use autosave mode. The default value is false.

designer.html

...

//Stop and redefinition the save method

designer.onSaveAsReport = (args, callback) => {

args.preventDefault = true;

var jsonString = args.report.saveToJsonString();

// save report

}

...

onPreviewReport

Asynchronous event is called when going to the report preview tab. The event handler argument event is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default it is PreviewReport.
report	a report object StiReport.
preventDefault	a flag to prevent further processing of the event. The default value is false.
async	a flag is used to provide the ability to stop the execution of the event before the callback function is executed. By default, the value is set to false.
viewer	a viewer object StiViewer.

designer.html

...

designer.onPreviewReport = function (args) {

var dataSet = new Stimulsoft.System.Data.DataSet("SimpleDataSet");

dataSet.readJsonFile("Data/Demo.json");

args.report.regData(dataSet.dataSetName, "", dataSet);

}

...

onExit

Is called before closing the designer. The event handler argument event is an object with the next fields:

Name	Description
sender	The identifier of the component, which initiated this event.
event	a string ID for the current event. By default it is Exit.

designer.html

...

designer.onExit = function (args) {

console.log(args.event);

}

...