RegisterEvent

PowerScript function

Description

Registers the PowerBuilder user defined event so
they can be triggered in JavaScript.

Applies to

WebBrowser controls

Syntax

controlname.RegisterEvent (string eventname)

1	controlname.RegisterEvent (string eventname)

Argument	Description
controlname	The name of the WebBrowser control.
eventname	The name of the user-defined event to be registered.

Return value

Integer.

Returns values as follows.

1 — the event is registered successfully.

-1 — the event is already registered.

-2 — failed to get the browser instance.

Examples

The following example defines a PowerBuilder user event which is
then triggered in JavaScript in wb_1, and the result of the JavaScript
which is returned in a JSON string is parsed by the JSONParser
object.

Note that this user event should not call any other WebBrowser
function, otherwise the application may get stuck.

//define a user event: ue_getstring in wb_1
event type string ue_getstring(string as_arg);
string ls_String
ls_String = "This is PB Event!" + "~r~nFrom JavaScript:" + as_arg
Return ls_String
end event

Integer li_Return
String ls_JS, ls_Result, ls_Error
JsonParser lnv_JsonParser
Long ll_RootObject
String ls_Type, ls_Value

li_Return = wb_1.RegisterEvent("ue_getstring")
If li_Return = 1 Then
        ls_JS = "function event1() { return window.webBrowser.ue_getstring('Hi,PB!');} event1();"
        li_Return = wb_1.EvaluateJavascriptSync(ls_JS, ls_Result, ls_Error)
        If li_Return = 1 Then
               lnv_JsonParser = Create JsonParser
               lnv_JsonParser.LoadString(ls_Result)
               ll_RootObject = lnv_JsonParser.GetRootItem()
               ls_Value = lnv_JsonParser.GetItemString( ll_RootObject, "value" )
        End If
End If
//{"type":"string","value":"This is PB Event!
From JavaScript:Hi,PB!"}
MessageBox( "Tips", ls_Result )

//This is PB Event!
//From JavaScript:Hi,PB!
MessageBox( "Tips", ls_Value )