Documentation

Trace: Data API

(flutterui)

Data API

For managing the data of a screen, the CustomScreen provides a simple API which can be accessed via getDataApi('DATA_PROVIDER_NAME') from anywhere in it's extended classes.

This API provides following functions:

  • dynamic getValue(String columnName)
    Provides the value of a specific column
  • List getValues(List columnNames)
    Provides a list of values for the specified columns
  • setValue(String columnName, dynamic value)
    Sets the value for a specific column
  • setValues(List columnNames, List values)
    Sets the values for a list of specified columns
  • insertRecord()
    Inserts a new record
  • deleteRecord(int index)
    Deletes the record at the specified index
  • selectRecord(int index)
    Selects the record at the specified index

The client persists those changes by itself.

Examples

Reading a value
DataApi dataApi = getDataApi('JVxMobileDemo/Con-CG/contacts#4');
 
FlatButton(
    child: Text("Call"), onPressed: () {
        phone = dataApi.getValue("PHONE");
	launch("tel://$phone");
    })
Setting a value
DataApi dataApi = getDataApi('JVxMobileDemo/Con-CG/contacts#4');
 
FlatButton(
    child: Text("Set phone number"), onPressed: () {
        phone = dataApi.setValue("PHONE", '+43660123456');
    }
)
Inserting a record
DataApi dataApi = getDataApi('JVxMobileDemo/Con-CG/contacts#4');
 
FlatButton(
    child: Text("Insert"), onPressed: () {
        phone = dataApi.insertRecord();
    }
)

More examples can be found here and here.

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