Jsp inputfield - Event Handling examples

Hi,
Can someone please tell me how to handle an event for jsp inputField
The same way how we do it for button ... I want to know some event based attributes for inputfield
Thanks,
Sandeep

Hi,
Can u please close these threads appropriately. I think my answer gave u the solution. Please mark the answer as 'Problem Solved'.
JspDynPage - JspDynPage Communication ???
Program Flow using response.write(" "); ???
For this question, there are no standard events for input field like button or any other control. But u can try with onFocus or onBlur etc. I will try to get u some example.
Regards,
Harini S

Similar Messages

Are These Two Event Handler Examples Equivalent?

I have found 2 examples of adding an event handler in C#. The even handler is (obviously) the method named b2_FlashProgressChanged. Are both of these two forms valid and equivalent?
BackgroundWorker bw = new BackgroundWorker();
bw.ProgressChanged += bw_FlashProgressChanged;
bw.ProgressChanged += new ProgressChangedEventHandler(this.bw_FlashProgressChanged);
private void bw_FlashProgressChanged(object sender, ProgressChangedEventArgs e)
MCSD .NET developer in Dallas, Texas

Yes. In the initial releases of C# the compiler could not infer the type of a method given just its name so you had to explicitly wrap it in event handler. But a long time back the compiler was updated to allow for type inferencing such that the compiler
can verify that a method name matches the signature of a delegate and therefore does not need the explicit conversion anymore. You should prefer the first syntax when possible as it is less typing and easier to read IMO.
Michael Taylor
http://blogs.msmvps.com/p3net

Java Event Handling in JSP Pages

Dear All:
This is what I wanna do. when user enters text in my <input type="text" ... > in my JSP page, I want to take this user entered data and convert it in another language simultaneously as the user is inputting text in another textarea.
Right now the only choice I have is onChange="convert()" Javascript function.
But I dont want to use Javascript as I already have a Java class which does that for the Swing GUI client.
Is their a way i can embed java for event handling in jsp.
thanks,
Chetan

only if you use an applet, javascript, etc.
remember, jsp is server-side, not client-side
what the client sees is html or whatever (i.e. static content)

Is there a C# example of using the ExpressionEdit Control Custom Button Event Handler

TestStand 4.1
C# 2008
I have added the event handler to the ExpressionEdit events as I would any event handler:
exprEdit.ButtonClick += new NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler(_ExpressionEditEvents_ButtonClickEvent);
Next, I create the Event Handler using the syntax
public void _ExpressionEditEvents_ButtonClickEvent(NationalInstruments.TestStand.Interop.UI.ExpressionEditButton btn)
I get the following error when I try to build:
Error 1 No overload for '_ExpressionEditEvents_ButtonClickEvent' matches delegate 'NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler'
I assume this means that I don't have the correct parameters or types in my Event Handler declaration but it matches the Object Browser. Any ideas on what I am missing?
Solved!
Go to Solution.

Try removing the "Ax." from your namespace qualifier as I marked below. I think you want the one in just the UI namespace.
Edit: well not necessarily. Is your exprEdit variable declared as "NationalInstruments.TestStand.Interop.UI.Ax.AxExpressionEdit" or as "NationalInstruments.TestStand.Interop.UI.ExpressionEdit"?
If it is an AxExpressionEdit then I think you will want your event handler to look like this:
void exprEdit_ButtonClick(object sender, NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEvent e)
-Jeff
skribling wrote:
TestStand 4.1
C# 2008
I have added the event handler to the ExpressionEdit events as I would any event handler:
exprEdit.ButtonClick += new NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler(_ExpressionEditEvents_ButtonClickEvent);
Next, I create the Event Handler using the syntax
public void _ExpressionEditEvents_ButtonClickEvent(NationalInstruments.TestStand.Interop.UI.ExpressionEditButton btn)
I get the following error when I try to build:
Error 1 No overload for '_ExpressionEditEvents_ButtonClickEvent' matches delegate 'NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler'
I assume this means that I don't have the correct parameters or types in my Event Handler declaration but it matches the Object Browser. Any ideas on what I am missing?
Message Edited by Jeff.A. on 06-11-2010 03:25 PM
Message Edited by Jeff.A. on 06-11-2010 03:28 PM

Event handling in Dynpage

Hi all,
This is my first post in SDN.
Can any one tell me how to submit a form in DYNPAGE via radio button. If I check the radio button on, it should submit the form and should return the same page.
Appreciate you help.
Thanks,
Karthik

Hi,
The following code regarding Event Handling for Dynpage. May be this example code useful for you.
package com.customer.training;
import com.sapportals.htmlb.Button;
import com.sapportals.htmlb.Component;
import com.sapportals.htmlb.DropdownListBox;
import com.sapportals.htmlb.Form;
import com.sapportals.htmlb.FormLayout;
import com.sapportals.htmlb.GridLayout;
import com.sapportals.htmlb.InputField;
import com.sapportals.htmlb.Label;
import com.sapportals.htmlb.TextView;
import com.sapportals.htmlb.enum.ButtonDesign;
import com.sapportals.htmlb.enum.TextViewDesign;
import com.sapportals.htmlb.event.Event;
import com.sapportals.htmlb.page.DynPage;
import com.sapportals.htmlb.page.PageException;
import com.sapportals.htmlb.rendering.IPageContext;
import com.sapportals.portal.htmlb.page.PageProcessorComponent;
public class Suresh_SearchDynPage extends PageProcessorComponent {
public DynPage getPage() {
    return new Suresh_SearchDynPageDynPage();
public static class Suresh_SearchDynPageDynPage extends DynPage {
     public int flag ;
     public final static int disp_info = 1;
     public final static int read_info = 2;
     public final static int error_info = 3;
     public static String flag_info = "MyFlag";
     public static String disp_drop = " ";
     public String errorMessage;
     String firstName ;
     String lastName ;
     String Email ;
     String dropsel;
Initialization code executed once per user.
    public void doInitialization() {
                    flag = read_info;
                    IPageContext ctx = this.getPageContext();
                    ctx.setAttribute("FirstName","");
                    ctx.setAttribute("LastName","");
                    ctx.setAttribute("email","");
Input handling code. In general called the first time with the second page request from the user.
    public void doProcessAfterInput() throws PageException {
          Component comp;
          comp = this.getComponentByName("FirstName");
          if (comp instanceof InputField)
                    firstName = ((InputField) comp).getString().getValue();
          comp = this.getComponentByName("LastName");
          if (comp instanceof InputField)
                              lastName = ((InputField) comp).getString().getValue();
          comp = this.getComponentByName("email");
                    if (comp instanceof InputField)
                                        Email = ((InputField) comp).getString().getValue();
          comp = this.getComponentByName("DisplayType");
                    if (comp instanceof DropdownListBox)
                         dropsel = ((DropdownListBox) comp).getSelection();
// Store the selected values in corresponding field name for nextScreen
          IPageContext ctx = this.getPageContext();
          flag = new Integer(ctx.getAttribute(flag_info).toString()).intValue();
          ctx.setAttribute("FirstName",firstName);
          ctx.setAttribute("LastName",lastName);
          ctx.setAttribute("email",Email);
          ctx.setAttribute("DisplayName",dropsel);
Create output. Called once per request.
    public void doProcessBeforeOutput() throws PageException {
      Form myForm = this.getForm();
       this.getPageContext().setAttribute(flag_info,new Integer(flag));
     switch(flag)
      case read_info:
                FormLayout f1 = new FormLayout();
                TextView t1 = new TextView();
                t1.setDesign(TextViewDesign.HEADER2);
                t1.setText("This is the Info U Entered................");
                TextView t2 = new TextView();
                t2.setText(firstName);
                Label dispFname = new Label("dispFirstName");
                dispFname.setText("First Name");
                dispFname.setLabelFor(t2);
                TextView t3 = new TextView();
                t3.setText(lastName);
                Label dispLname = new Label("dispLastName");
                dispLname.setText("Last Name");
                dispLname.setLabelFor(t3);
                TextView t4 = new TextView();
                t4.setText(Email);
                Label dispEmail = new Label("dispEmail");
                dispEmail.setText("Email");
                dispEmail.setLabelFor(t4);
                TextView t5 = new TextView();
                t5.setText(dropsel);
                Label dispType = new Label("dispInfo");
                dispType.setText("Display Info");
                dispType.setLabelFor(t5);
                Button btnback = new Button("Back");
                btnback.setText("Back");
                btnback.setOnClick("Back");
                f1.addComponent(1,1,t1);
                f1.addComponent(2,1,dispFname);
                f1.addComponent(2,2,t2);
                f1.addComponent(3,1,dispLname);
                f1.addComponent(3,2,t3);
                f1.addComponent(4,1,dispEmail);
                f1.addComponent(4,2,t4);
                f1.addComponent(5,1,dispType);
                f1.addComponent(5,2,t5);
                f1.addComponent(6,1,btnback);
                myForm.addComponent(f1);
           break;
      case error_info:
                FormLayout f2 = new FormLayout();
                IPageContext ctx = this.getPageContext();
                TextView t6 = new TextView();
                t6.setText("Error : ");
                t6.setDesign(TextViewDesign.HEADER2);
                t6.setText(errorMessage);
                f2.addComponent(3,1,t6);
                myForm.addComponent(f2);
           break;
            default:
                          // create your GUI here....
                                    GridLayout g1 = new GridLayout();
//                                    IPageContext ctx1 = this.getPageContext();
                                    Label first_l = new Label("First Name");
                                    InputField first_if = new InputField("FirstName");
                                    Label last_l = new Label("Last Name");
                                    InputField last_if = new InputField("LastName");
                                    Label email_l = new Label("E-Mail Address");
                                    InputField email_if = new InputField("email");
                                    Label info_l = new Label("Display Info for");
                                    DropdownListBox displayType = new DropdownListBox("DisplayType");
                                    displayType.addItem("userinfo", "User Info");
                                    displayType.addItem("groupinfo", "Group Membership");
                                    displayType.addItem("roleinfo", "Role Assignment");
//                                    displayType.setSelection(ctx1.getAttribute("DisplayType").toString());
                                    Button btn = new Button("submit");
                                    btn.setText("Get Info");
                                    btn.setDesign(ButtonDesign.EMPHASIZED);
                                    btn.setOnClick("Get");
//                                    add the ui controls to grid
                                    g1.setCellPadding(4);
                                    g1.addComponent(1,1,first_l);
                                    g1.addComponent(1,2,first_if);
                                    g1.addComponent(2,1,last_l);
                                    g1.addComponent(2,2,last_if);
                                    g1.addComponent(3,1,email_l);
                                    g1.addComponent(3,2,email_if);
                                    g1.addComponent(4,1,info_l);
                                    g1.addComponent(4,2,displayType);
                                    g1.addColSpanComponent(5,1,btn,2);
                                    g1.setHeightPercentage(50);
                                    g1.setColumnSize(50);
                                    myForm.setFocusedControl(displayType);
                                    myForm.setMessageBarAtFormEnd(true);
                                    myForm.setWidthInHundredPercent(true);
                                    myForm.addComponent(g1);
                                    break;
    public void onGet(Event e)
     if(firstName.length()== 0)
          flag = error_info;
          errorMessage = "Invalid Input..............";
     else
          flag = read_info;
      public void onBack(Event e1)
            flag = disp_info;

HTMLB .. Input field event handling..

Hi guys,
I have a input field htmlb in my jsp. I have to handle on blur event for this.. i.e if a user gives in somethin in the input field and once it looses focus, a event should get triggered. And probably in my case it will be helpful for me if I have this event handler method in the dynpage. For this kind of event handling what should I write in the followin tag
<htmlb:inputfield id="" value="" width=""> plz tell me a tag attribute which supports this event.
Regards,
PP.

Hi Priyanka,
You can get reference of your input field in JSP into DynPage. Do like this:
Declare input field in JSP
<hbj:inputfield id="input" value="test">
In DynPage, get refernce of the input field
Wherever you want to trigger event
InputField myInputField =(InputField) getComponentByName("input");
myInputField.setClientEvent();
Hope this helps.
regards,
Siva
Note: If you get success, please post the solution before you close this thread.
Message was edited by:
Siva Rama Krushna

UIX event handler + struts

Hi,
I'm using UIX + struts in jdev10g and im getting problems trying to handle a simple action binding event like the "Next" operation. Below is a short example of what im trying to do.
Test.uix
<submitButton text="Next" model="${bindings.Next}" id="Next2" event="next"/>
<event name="next" source="Next2">
<invoke method="doIt" javaType="oracle.jbo.uicli.binding.JUCtrlActionBinding"
instance="${bindings.Next}"/>
</event>
testAction.java
public void onNext(DataActionContext ctx)
if (ctx.getEventActionBinding() != null)
ctx.getEventActionBinding().doIt();
If i run the code above i can see that it executes ctx.getEventActionBinding().doIt(); but the action binding never gets executed, and this efect is the same for other actions like create,previous etc...
Another thing that calls my attention is that every time i drag a operation from the DataControl Palette the event name is always "action"
<submitButton text="First" model="${bindings.First}"
id="First0" event="action"/>
So how is the correct way to handle events in the UIX + Struts?????
Please i need a help on this one!!!!!
Tanks,
Eduardo M. Sasso

First of all tanks for the help.
But what i want to do is to subclass the DataForwardAction for my DataPage and let the struts controller handle the event, just like the documentation says...
About Event Handling in Applications Using Oracle ADF, UIX, and Struts
http://helponline.oracle.com/jdeveloper/help?topic=adf_auixadfevents_html
If i try to do the same thing using jsp it works great...
This is problem is getting me nuts!!! it looks to me that this problem is very easy to solve but i just cant see the solution....
tanks again

How can I execute an external program from within a button's event handler?

I am using Tomcat ApacheTomcat 6.0.16 with Netbeans 6.1 (with the latest JDK/J2EE)
I need to execute external programs from an event handler for a button on a JSF page (the program is compiled, and extremely fast compared both to plain java and especially stored procedures written in SQL).
I tried what I'd do in a standalone program (as shown in the appended code), but it didn't work. Instead I received text saying the program couldn't be found. This error message comes even if I try the Windows command "dir". I thought with 'dir' I'd at least get the contents of the current working directory. :-(
I can probably get by with cgi on Apache's httpd server (or, I understand tomcat supports cgi, but I have yet to get that to work either), but whatever I do I need to be able to do it from within the button's event handler. And if I resort to cgi, I must be able to maintain session jumping from one server to the other and back.
So, then, how can I do this?
Thanks
Ted
NB: The programs that I need to run do NOT take input from the user. Rather, my code in the web application processes user selections from selection controls, and a couple field controls, sanitizes the inoputs and places clean, safe data in a MySQL database, and then the external program I need to run gets safe data from the database, does some heavy duty number crunching, and puts the output data into the database. They are well insulated from mischeif.
NB: In the following array_function_test.pl was placed in the same folder as the web application's jsp pages, (and I'd tried WEB-INF - with the same result), and I DID see the file in the application's war file.
        try {
            java.lang.ProcessBuilder pn = new java.lang.ProcessBuilder("array_function_test.pl");
            //pn.directory(new java.io.File("K:\\work"));
            java.lang.Process pr = pn.start();
            java.io.BufferedInputStream bis = (java.io.BufferedInputStream)pr.getInputStream();
            String tmp = new String("");
            byte b[] = new byte[1000];
            int i = 0;
            while (i != -1) {
                bis.read(b);
                tmp += new String(b);
            getSelectionsDisplayTextArea().setText(getSelectionsDisplayTextArea().getText() + "\n\n" + tmp);
        } catch (java.io.IOException ex) {
            getSelectionsDisplayTextArea().setText(getSelectionsDisplayTextArea().getText() + "\n\n" + ex.getMessage());
        }

Hi Fonsi!
One way to execute an external program is to use the System Exec.vi. You find it in the functions pallet under Communication.
/Thomas

Enhance standard class with event handler method

In trying to enhance a standard class with a new event handler class, I find that the ECC 6.0 EHP4 system does not appear to recognise the fact the method is an event handler method. The specific example is a new method to handle the event CL_GUI_ALV_GRID->USER_COMMAND.
I notice that the flag called Active has not been ticked - see image below. Perhaps this is the reason why the event handler is not being triggered.
Note that there is an event handler for the same event in the standard class which obviously is executed as expected. Any ideas on limitations in the system or I am missing a step?
Thanks
John

Thank you for your replies.
There is a bug in the ALV handler of a standard SAP class (when executed in ITS WebGUI) and I was hoping to create a custom event handler as an Enhancement to execute some custom code to sort of "handle the bug".
I agree - ideally it should be done in a Z class but that will not give me access to the object methods and attributes of the enhanced class.
Cheers,
John

Javascript embedded in button pl/sql event handler not being executed

Javascript calls not working from pl/sql button event handler. What am I missing? Are specific settings needed to execute javascript from pl/sql proceedures?
Example: Want to toggle target='_blank' off and on in a button pl/sql event handler to open url call in new window & then reset when processing submit is done & the app returns to the form.
portal form button's pl/sql submit handler:
begin
htp.p('<script language=JavaScript>') ;
htp.p('this.form.target="_blank"') ;
htp.p('</script>') ;
PORTAL.wwa_app_module.set_target('http://www.oracle.com') ;
htp.p('<script language=JavaScript>') ;
htp.p('this.form.target="_blank"') ;
htp.p('</script>') ;
end ;
Putting the following in the button's javascript on_click event handler works great:
this.form.target='_blank'
to force opening new window with a call in the button's submit pl/sql code via:
PORTAL.wwa_app_module.set_target('http://www.oracle.com') ;
but then the target='_blank' is left on when the submit is done & we return to the form.
putting the above javascript as a function (called fcn_newpage) elsewhere (e.g., after form opens) & calling in the submit pl/sql with
htp.p('fcn_newpage') ;
also doesn't work.
Metalink thought this was an application issue instead of a bug, so thought I'd see if anyone knows what's going wrong here. (Portal 9.0.4.1)

thanks for your discussion of my post.
Please clarify:
"htp.p('fcn_newwindow') sends a string":
What would you suggest the proper syntax for a function fcn_newwindow() call from a pl/sql javascript block that differs from
htp.p('<script language="Javascript">') ;
htp.p('fcn_newwindow');
htp.p('</script>');
or more simply
htp.p('fcn_newwindow') ;
More generally, what I'm trying to figure out is under what conditions javascript is executed, if ever, in the pl/sql of a button (either the submit or custom event handler, depending on the button).
I've seen lots of posts asking how to do a simple htp.p('alert("THIS IS TROUBLE")') ; in a pl/sql event handler for a button on a form, but no description of how this can be done successfully.
In addition to alerts, in my case, I'd like to call a javascript fcn from a pl/sql event handle that would pass a URL (e.g., http://www.oracle.com) where the javascript fcn executed
window.open(URL). The API call to set_target(URL) in pl/sql has no ability to open in a new window, so calling that is inadequate to my needs and I must resort to javascript.
Its clear in the PL/SQL of a button, you can effect form components since p_session..set_target & p_session.get_target set or get the contents of form components.
So to see if javascript ever works, I tried to focus on something simple that only had to set what amounts to an enviromental variable when we returned to the form after a post. I chose to try to change the html value of TARGET from javascript in the PL/SQL button because it doesn't need to be implemented until we finish the post and return to the form.
So I focused on a hack, setting this.form.TARGET='_blank' in the on_click event handler that forced every subsequent URL call or refresh of the form to be a new window. I then wanted to turn off opening new windows once I'd opened the URL call in a new window by setting TARGET='' in the portal form. I can achieve what I want by coding this.form.TARGET='' in the javascript (on_focus, on_change, or on_mousedown, ...) of every form component that might refresh the form. However, that is a ridiculous hack when a simple htp.p('<script>') ; htp.p('this.form.target=""') ; htp.p('</script>') ; at the end of the button's pl/sql event handle should do the same thing reliably if javascript ever works in the pl/sql event handler.
If we didn't have access to form components through p_session calls, I'd assume it was a scope issue (what is available from the pl/sql event handler). But unless my syntax is just off, when, if ever, can javascript be used in a portal form's pl/sql event handler for a button?
if I code a javascript funtion in the forms' pl/sql before displaying form:
htp.p('<script language="JavaScript">') ;
htp.p('function fcn_new_window(URL)') ;
htp.p('window.open(URL)' ) ;
htp.p('</script>') ;
the function can be called from a button's on_click javascript event handler:
fcn_new_window('http://www.oracle.com')
but from the same button's pl/sql submit event handler this call doesn't work: htp.p('fcn_new_window("http://www.oracle.com")')
So my questions remain: Is there other syntax I need, or does javascript ever work properly from the pl/sql of a form button's event handler? If it doesn't work, isn't this a bug that should be fixed by Oracle?
I can probably figure out hacks to make things work the way I need, but executing javascript from pl/sql event handlers seems to be the expected way to affect portal html pages (forms, reports, ...) and it seems not to work as expected. I don't feel I should have to implement hacks for something as simple as calling a javascript function from pl/sql when almost every example I've found in metalink or the forums or Oracle Press's "portal bible" suggests using javascript from pl/sql via the utility htp.p() to effect web page components in portal.
My TAR on the subject, while still open, returned the result basically: "We can reproduce your situation. Everything looks okay to us, but we can't explain how to use javascript where you want or point you to any documentation that would solve your problem or expain why it should not work the way you want it to. We don't feel its a technical issue. Why don't you post the problem on the portal applications forum."
I'm hoping I'm just missing something fundamental and everything will work if I implement it a little differently. So if anyone sees my error, please let me know.
by the way, not sure this is germain, but in reference to your comment:
"redirections in pl/sql procedures give a peculiar result. in a pl/sql procedure, usually, portals give the last redirection statement and ignore anything else coming after it."
if I try to raise an alert:
htp.p('alert("you screwed up")');
return;
in a pl/sql event handler, it still doesn't raise the alert, even though its the last thing implemented in the event handler. But if I set the value of a text box using p_session..set_value_as_string() at the same spot, it correctly sets the text box value when I return to the form.

Drop Down List in ALV with Event handler

Hi All ,
I have created an ALV grid with a dropdown as one of the columns. This all works fine, except that I want to be able to react to a change in the value of each line's dropdown the next column values should change according to the user selection in the 1st column .
Is this possible?
As an example, I have a table of records with one column as a dropdown called " Replace Function Module " and in 2nd column i have call function of that Replace Function Module , If a change in " Replace Function Module " should change the call function of in the 2nd column .
I am using these objects lvc_t_drop , lvc_s_drop and the method " set_drop_down_table ",
Please Can any 1 tel me how to do this with any event handler ar any other way !

Hi,
You need to use event handler for this. Check if the below link gives some direction.
[http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/cda3992d-0e01-0010-90b2-c4e1f899ac01|http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/cda3992d-0e01-0010-90b2-c4e1f899ac01]
I guess you should create a method inside which you call the FM using the FM name from the selected cell in ALV.
I have not tried it out, but its worth a try.
Hope this helps!
Regards,
Saumya

Can we apply an event handler only for a custom request in oim 11G?

Hi,
We would like to create a custom request for user creation, modification etc.
I saw that event handlers allow to add business rules by running java code during differents steps of processes.
I would like to know if we can trigger an event handler on a specific request and not on all user CREATION, UPDATE etc.
For example, we would like to have differents creation requests and a differents event handler on each request.
And can we add "logical" input on request form and read them in event handler?
For example, 3 inputs: day, month and year on the form which fill one user attribute "end contract date".
Regards,
Pierre

thank you Akshat,
I saw part 19 in the developper's guide. If I understand, I can change the default CreateUserRequestData to define ALL form components that will be used in my differents user creation request templates.
I can use prepopulation adapter to pre populate field with java code.
I can use the plug-in point oracle.iam.request.plugins.StatusChangeEvent to run custom java code.
But they don't mention where you can run java code for a specific creation template named "MyUserCreationTemplate1" and other java code for an other specific creation tempalate" MyUserCreationTemplate2".
That makes me think we must retrieve the template name in java code and execute the appropriate business logic.
if request name==MyUserCreationTemplate1
Edited by: user1214565 on 31 mai 2011 07:42

WPF UI running in seperate runspace - able to set/get controls via synchronized hash table, but referencing the control via the hash table from within an event handler causes both runspaces to hang.

I am trying to build a proof of concept where a WPF form is hosted in a seperate runspace and updates are handled from the primary shell/runspace. I have had some success thanks to a great article by Boe Prox, but I am having an issue I wanted to open up
to see if anyone had a suggestion.
My goals are as follows:
1.) Set control properties from the primary runspace (Completed)
2.) Get control properties from the primary runspace (Completed)
3.) Respond to WPF form events in the UI runspace from the primary runspace (Kind of broken).
I have the ability to read/write values to the form, but I am having difficulty with events. Specifically, I can fire and handle events, but the minute I try to reference the $SyncHash from within the event it appears to cause a blocking condition hanging both
runspaces. As a result, I am unable to update the form based on an event being fired by a control.
In the example below, the form is loaded and the following steps occur:
1.) Update-Combobox is called and it populates the combobox with a list of service names and selects the first item.
2.) update-textbox is called and sets the Text property of the textbox.
3.) The Text value of the textbox is read by the function read-textbox and output using write-host.
4.) An event handle is registered for the SelectionChanged event for the combobox to call the update-textbox function used earlier.
5.) If you change the selection on the combobox, the shell and UI hangs as soon as $SyncHash is referenced. I suspect this is causing some sort of blocking condition from multiple threads trying to access the synchronized nature of the hash table, but I am
unsure as to why / how to work around it. If you comment out the line "$SyncHash.TXT_Output.Dispatcher.Invoke("Send",[action]{$SyncHash.TXT_Output.Text = $Value})" within update-textbox the event handler will execute/complete.
$UI_JobScript =
try{
Function New-Form ([XML]$XAML_Form){
$XML_Node_Reader=(New-Object System.Xml.XmlNodeReader $XAML_Form)
[Windows.Markup.XamlReader]::Load($XML_Node_Reader)
try{
Add-Type –AssemblyName PresentationFramework
Add-Type –AssemblyName PresentationCore
Add-Type –AssemblyName WindowsBase
catch{
Throw "Unable to load the requisite Windows Presentation Foundation assemblies. Please verify that the .NET Framework 3.5 Service Pack 1 or later is installed on this system."
$Form = New-Form -XAML_Form $SyncHash.XAML_Form
$SyncHash.Form = $Form
$SyncHash.CMB_Services = $SyncHash.Form.FindName("CMB_Services")
$SyncHash.TXT_Output = $SyncHash.Form.FindName("TXT_Output")
$SyncHash.Form.ShowDialog() | Out-Null
$SyncHash.Error = $Error
catch{
write-host $_.Exception.Message
#End UI_JobScript
#Begin Main
add-type -AssemblyName WindowsBase
[XML]$XAML_Form = @"
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Window.Resources>
<DataTemplate x:Key="DTMPL_Name">
<TextBlock Text="{Binding Path=Name}" />
</DataTemplate>
</Window.Resources>
<DockPanel LastChildFill="True">
<StackPanel Orientation="Horizontal" DockPanel.Dock="Top">
<Label Name="LBL_Services" Content="Services:" />
<ComboBox Name="CMB_Services" ItemTemplate="{StaticResource DTMPL_Name}"/>
</StackPanel>
<TextBox Name="TXT_Output"/>
</DockPanel>
</Window>
$SyncHash = [hashtable]::Synchronized(@{})
$SyncHash.Add("XAML_Form",$XAML_Form)
$SyncHash.Add("InitialScript", $InitialScript)
$Normal = [System.Windows.Threading.DispatcherPriority]::Normal
$UI_Runspace =[RunspaceFactory]::CreateRunspace()
$UI_Runspace.ApartmentState = [System.Threading.ApartmentState]::STA
$UI_Runspace.ThreadOptions = [System.Management.Automation.Runspaces.PSThreadOptions]::ReuseThread
$UI_Runspace.Open()
$UI_Runspace.SessionStateProxy.SetVariable("SyncHash",$SyncHash)
$UI_Pipeline = [PowerShell]::Create()
$UI_Pipeline.Runspace=$UI_Runspace
$UI_Pipeline.AddScript($UI_JobScript) | out-Null
$Job = $UI_Pipeline.BeginInvoke()
$SyncHash.ServiceList = get-service | select name, status | Sort-Object -Property Name
Function Update-Combobox{
write-host "`nBegin Update-Combobox [$(get-date)]"
$SyncHash.CMB_Services.Dispatcher.Invoke($Normal,[action]{$SyncHash.CMB_Services.ItemsSource = $SyncHash.ServiceList})
$SyncHash.CMB_Services.Dispatcher.Invoke($Normal,[action]{$SyncHash.CMB_Services.SelectedIndex = 0})
write-host "`End Update-Combobox [$(get-date)]"
Function Update-Textbox([string]$Value){
write-host "`nBegin Update-Textbox [$(get-date)]"
$SyncHash.TXT_Output.Dispatcher.Invoke("Send",[action]{$SyncHash.TXT_Output.Text = $Value})
write-host "End Update-Textbox [$(get-date)]"
Function Read-Textbox(){
write-host "`nBegin Read-Textbox [$(get-date)]"
$SyncHash.TXT_Output.Dispatcher.Invoke($Normal,[action]{$Global:Return = $SyncHash.TXT_Output.Text})
$Global:Return
remove-variable -Name Return -scope Global
write-host "End Read-Textbox [$(get-date)]"
#Give the form some time to load in the other runspace
$MaxWaitCycles = 5
while (($SyncHash.Form.IsInitialized -eq $Null)-and ($MaxWaitCycles -gt 0)){
Start-Sleep -Milliseconds 200
$MaxWaitCycles--
Update-ComboBox
Update-Textbox -Value $("Initial Load: $(get-date)")
Write-Host "Value Read From Textbox: $(Read-TextBox)"
Register-ObjectEvent -InputObject $SyncHash.CMB_Services -EventName SelectionChanged -SourceIdentifier "CMB_Services.SelectionChanged" -action {Update-Textbox -Value $("From Selection Changed Event: $(get-date)")}

Thanks again for the responses. This may not be possible, but I thought I would throw it out there. I appreciate your help in looking into this.
To clarify the "Respond to control events in the main runspace"... I'm would like to have an event generated by a form object in the UI runspace (ex: combo box selectionchanged event) trigger a delegate within the main runspace and have that delegate in
the main runspace update the form in the UI runspace.
ex:
1.) User changes selection on combo box generating form event
2.) Event calls delegate (which I have gotten to work)
3.) Delegate does some basic processing (works)
4.) Delegate attempts to update form in UI runspace (hangs)
As to the delegates / which runspace they are running in. I see the $synchash variable if I run get-var within a delegate, but I do not see the $Form variable so I am assuming that they are in the main runspace. Do you agree with that assumption?

The onDeactivate event handler doesn't work in InDesign CC. Why?

Hi guys.
I’m working on a script in Javascript for InDesign CC.
The big problem is that the onDeactivate event handler doesn’t work.
Here’s an example that works in InDesign CSx but not in InDesign CC:
#target indesign
var w = new Window ("dialog", "Test onDeactivate");
var et_1 = w.add("edittext", [undefined, undefined, 300, 30], "Lorem ipsum");
var et_2 = w.add("edittext", [undefined, undefined, 300, 30], "Dolor sit amet");
var st = w.add("statictext", [undefined, undefined, 300, 30], "CONSOLE:\r\r", {multiline: true});
et_1.onDeactivate = et_2.onDeactivate = function(){
st.text = "CONSOLE: I left the field with this text:\r\t«" + this.text +"»"; }
var b_ok = w.add("button", undefined, "OK");
w.show();
The script shows a dialog window with 2 edit text fields: when a field loses the focus (clicking on the other one), the «CONSOLE» shows the text of the old field.
Adobe, please, fix this issue as soon as possible.
Thanks.
Giorgio

It's a bug, and it has been reported. Please report it yourself, the more reports the better. It's no good asking Adobe in this forum to fix something.
Peter

Event handling in oops alv

hi experts,
event double click.
when double click on vbeln it should go to va03 transaction . how would i do that in oops alv.

hai,
you can go through code below .
*& Report Z_CLARIFY                                                   *
REPORT Z_CLARIFY                               .
DATA: G_GRID TYPE REF TO CL_GUI_ALV_GRID.
DATA: L_VALID TYPE C,
      V_FLAG,
      V_DATA_CHANGE,
      V_ROW TYPE LVC_S_ROW,
      V_COLUMN TYPE LVC_S_COL,
      V_ROW_NUM TYPE LVC_S_ROID.
DATA: IT_ROW_NO TYPE LVC_T_ROID,
      X_ROW_NO TYPE LVC_S_ROID.
DATA:BEGIN OF ITAB OCCURS 0,
     VBELN LIKE LIKP-VBELN,
     POSNR LIKE LIPS-POSNR,
     CELLCOLOR TYPE LVC_T_SCOL, "required for color
     DROP(10),
     END OF ITAB.
*The Below Definitions Must.....
DATA:
Reference to document
       DG_DYNDOC_ID       TYPE REF TO CL_DD_DOCUMENT,
Reference to split container
       DG_SPLITTER          TYPE REF TO CL_GUI_SPLITTER_CONTAINER,
Reference to grid container
       DG_PARENT_GRID     TYPE REF TO CL_GUI_CONTAINER,
Reference to html container
       DG_HTML_CNTRL        TYPE REF TO CL_GUI_HTML_VIEWER,
Reference to html container
       DG_PARENT_HTML     TYPE REF TO CL_GUI_CONTAINER.
"up to here
      CLASS lcl_event_handler DEFINITION
CLASS LCL_EVENT_HANDLER DEFINITION .
PUBLIC SECTION .
    METHODS:
**Hot spot Handler
    HANDLE_HOTSPOT_CLICK FOR EVENT HOTSPOT_CLICK OF CL_GUI_ALV_GRID
                      IMPORTING E_ROW_ID E_COLUMN_ID ES_ROW_NO,
**Double Click Handler
    HANDLE_DOUBLE_CLICK FOR EVENT DOUBLE_CLICK OF CL_GUI_ALV_GRID
                                     IMPORTING E_ROW E_COLUMN ES_ROW_NO,
    TOP_OF_PAGE FOR EVENT TOP_OF_PAGE              "event handler
                         OF CL_GUI_ALV_GRID
                         IMPORTING E_DYNDOC_ID.
       END_OF_LIST FOR EVENT end_of_list              "event handler
                        OF CL_GUI_ALV_GRID
                        IMPORTING E_DYNDOC_ID.
ENDCLASS.                    "lcl_event_handler DEFINITION
      CLASS lcl_event_handler IMPLEMENTATION
CLASS LCL_EVENT_HANDLER IMPLEMENTATION.
*Handle Hotspot Click
METHOD HANDLE_HOTSPOT_CLICK .
    CLEAR: V_ROW,V_COLUMN,V_ROW_NUM.
    V_ROW = E_ROW_ID.
    V_COLUMN = E_COLUMN_ID.
    V_ROW_NUM = ES_ROW_NO.
   MESSAGE I000 WITH V_ROW 'clicked'.
    CLEAR IT_ROW_NO[].
    X_ROW_NO-ROW_ID = V_ROW.
    APPEND X_ROW_NO TO IT_ROW_NO .
    CALL METHOD G_GRID->SET_SELECTED_ROWS
      EXPORTING
        IT_ROW_NO = IT_ROW_NO.
ENDMETHOD.                    "lcl_event_handler
*Handle Double Click
METHOD HANDLE_DOUBLE_CLICK.
    CLEAR: V_ROW,V_COLUMN,V_ROW_NUM.
    V_ROW = E_ROW.
    V_COLUMN = E_COLUMN.
    V_ROW_NUM = ES_ROW_NO.
    IF E_COLUMN = 'VBELN'.
      SET PARAMETER ID 'VL' FIELD ITAB-VBELN.
      CALL TRANSACTION 'VL03N' AND SKIP FIRST SCREEN.
    ENDIF.
    IF E_COLUMN = 'POSNR'.
      SET PARAMETER ID 'VL' FIELD ITAB-VBELN.
      CALL TRANSACTION 'VL03N' AND SKIP FIRST SCREEN."
    ENDIF.
ENDMETHOD.                    "handle_double_click
METHOD END_OF_LIST.                   "implementation
Top-of-page event
   PERFORM EVENT_TOP_OF_PAGE USING DG_DYNDOC_ID.
ENDMETHOD.                            "top_of_page
    METHOD TOP_OF_PAGE.                   "implementation
Top-of-page event
    PERFORM EVENT_TOP_OF_PAGE USING DG_DYNDOC_ID.
ENDMETHOD.                            "top_of_page
ENDCLASS.                    "LCL_EVENT_HANDLER IMPLEMENTATION
*&             Global Definitions
DATA:      G_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER,
"Container1
            G_HANDLER TYPE REF TO LCL_EVENT_HANDLER. "handler
DATA: OK_CODE LIKE SY-UCOMM,
      SAVE_OK LIKE SY-UCOMM,
      G_CONTAINER1 TYPE SCRFNAME VALUE 'TEST',
      GS_LAYOUT TYPE LVC_S_LAYO.
data: v_lines type i.
data: v_line(3) type c.
*- Fieldcatalog for First and second Report
DATA: IT_FIELDCAT TYPE LVC_T_FCAT,
      X_FIELDCAT TYPE LVC_S_FCAT,
      LS_VARI TYPE DISVARIANT.
               START-OF_SELECTION
START-OF-SELECTION.
SELECT VBELN
         POSNR
         FROM LIPS
         UP TO 20 ROWS
         INTO CORRESPONDING FIELDS OF TABLE ITAB.
describe table itab lines v_lines.
END-OF-SELECTION.
IF NOT ITAB[] IS INITIAL.
    CALL SCREEN 100.
ELSE.
   MESSAGE I002 WITH 'NO DATA FOR THE SELECTION'(004).
ENDIF.
*&      Form CREATE_AND_INIT_ALV
      text
FORM CREATE_AND_INIT_ALV .
DATA: LT_EXCLUDE TYPE UI_FUNCTIONS.
"attention.....from here
"split your container here...into two parts
"create the container
CREATE OBJECT G_CUSTOM_CONTAINER
           EXPORTING CONTAINER_NAME = 'SCR100_CUST'.
"this is for top of page
Create TOP-Document
CREATE OBJECT DG_DYNDOC_ID
                   EXPORTING STYLE = 'ALV_GRID'.
Create Splitter for custom_container
CREATE OBJECT DG_SPLITTER
             EXPORTING PARENT = G_CUSTOM_CONTAINER
                       ROWS    = 2
                       COLUMNS = 1.
Split the custom_container to two containers and move the reference
to receiving containers g_parent_html and g_parent_grid
"i am allocating the space for grid and top of page
CALL METHOD DG_SPLITTER->GET_CONTAINER
    EXPORTING
      ROW       = 1
      COLUMN    = 1
    RECEIVING
      CONTAINER = DG_PARENT_HTML.
CALL METHOD DG_SPLITTER->GET_CONTAINER
    EXPORTING
      ROW       = 2
      COLUMN    = 1
    RECEIVING
      CONTAINER = DG_PARENT_GRID.
CALL METHOD DG_SPLITTER->GET_CONTAINER
   EXPORTING
     ROW       = 2
     COLUMN    = 1
   RECEIVING
     CONTAINER = DG_PARENT_HTML.
CALL METHOD DG_SPLITTER->GET_CONTAINER
   EXPORTING
     ROW       = 1
     COLUMN    = 1
   RECEIVING
     CONTAINER = DG_PARENT_GRID.
"you can set the height of it
Set height for g_parent_html
CALL METHOD DG_SPLITTER->SET_ROW_HEIGHT
    EXPORTING
      ID     = 1
      HEIGHT = 5.
"from here as usual..you need to specify parent as splitter part
"which we alloted for grid
CREATE OBJECT G_GRID
         EXPORTING I_PARENT = DG_PARENT_GRID.
Set a titlebar for the grid control
CLEAR GS_LAYOUT.
GS_LAYOUT-GRID_TITLE = TEXT-003.
GS_LAYOUT-ZEBRA = SPACE.
GS_LAYOUT-CWIDTH_OPT = 'X'.
GS_LAYOUT-NO_ROWMARK = 'X'.
GS_LAYOUT-CTAB_FNAME = 'CELLCOLOR'.
CALL METHOD G_GRID->REGISTER_EDIT_EVENT
    EXPORTING
      I_EVENT_ID = CL_GUI_ALV_GRID=>MC_EVT_ENTER.
CREATE OBJECT G_HANDLER.
SET HANDLER G_HANDLER->HANDLE_DOUBLE_CLICK FOR G_GRID.
SET HANDLER G_HANDLER->HANDLE_HOTSPOT_CLICK FOR G_GRID.
SET HANDLER G_HANDLER->END_OF_LIST FOR G_GRID.
SET HANDLER G_HANDLER->TOP_OF_PAGE FOR G_GRID.
DATA: LS_CELLCOLOR TYPE LVC_S_SCOL. "required for color
DATA: L_INDEX TYPE SY-TABIX.
"Here i am changing the color of line 1,5,10...
"so you can change the color of font conditionally
LOOP AT ITAB.
    L_INDEX = SY-TABIX.
    IF L_INDEX = 1 OR L_INDEX = 5 OR L_INDEX = 10.
      LS_CELLCOLOR-FNAME = 'VBELN'.
      LS_CELLCOLOR-COLOR-COL = '6'.
      LS_CELLCOLOR-COLOR-INT = '0'.
      LS_CELLCOLOR-COLOR-INV = '1'.
      APPEND LS_CELLCOLOR TO ITAB-CELLCOLOR.
      MODIFY ITAB INDEX L_INDEX TRANSPORTING CELLCOLOR.
      LS_CELLCOLOR-FNAME = 'POSNR'.
      LS_CELLCOLOR-COLOR-COL = '6'.
      LS_CELLCOLOR-COLOR-INT = '0'.
      LS_CELLCOLOR-COLOR-INV = '1'.
      APPEND LS_CELLCOLOR TO ITAB-CELLCOLOR.
      MODIFY ITAB INDEX L_INDEX TRANSPORTING CELLCOLOR.
    ENDIF.
ENDLOOP.
setting focus for created grid control
CALL METHOD CL_GUI_CONTROL=>SET_FOCUS
    EXPORTING
      CONTROL = G_GRID.
Build fieldcat and set editable for date and reason code
edit enabled. Assign a handle for the dropdown listbox.
PERFORM BUILD_FIELDCAT.
PERFORM SET_DRDN_TABLE.
Optionally restrict generic functions to 'change only'.
(The user shall not be able to add new lines).
PERFORM EXCLUDE_TB_FUNCTIONS CHANGING LT_EXCLUDE.
**Vaiant to save the layout
LS_VARI-REPORT      = SY-REPID.
LS_VARI-HANDLE      = SPACE.
LS_VARI-LOG_GROUP   = SPACE.
LS_VARI-USERNAME    = SPACE.
LS_VARI-VARIANT     = SPACE.
LS_VARI-TEXT        = SPACE.
LS_VARI-DEPENDVARS = SPACE.
**Calling the Method for ALV output
CALL METHOD G_GRID->SET_TABLE_FOR_FIRST_DISPLAY
    EXPORTING
      IT_TOOLBAR_EXCLUDING = LT_EXCLUDE
      IS_VARIANT           = LS_VARI
      IS_LAYOUT            = GS_LAYOUT
      I_SAVE               = 'A'
    CHANGING
      IT_FIELDCATALOG      = IT_FIELDCAT
      IT_OUTTAB            = ITAB[].
"do these..{
Initializing document
CALL METHOD DG_DYNDOC_ID->INITIALIZE_DOCUMENT.
Processing events
CALL METHOD G_GRID->LIST_PROCESSING_EVENTS
    EXPORTING
      I_EVENT_NAME = 'TOP_OF_PAGE'
      I_DYNDOC_ID = DG_DYNDOC_ID.
"end }
Set editable cells to ready for input initially
CALL METHOD G_GRID->SET_READY_FOR_INPUT
    EXPORTING
      I_READY_FOR_INPUT = 1.
ENDFORM.                               "CREATE_AND_INIT_ALV
*&      Form EXCLUDE_TB_FUNCTIONS
      text
     -->PT_EXCLUDE text
FORM EXCLUDE_TB_FUNCTIONS CHANGING PT_EXCLUDE TYPE UI_FUNCTIONS.
Only allow to change data not to create new entries (exclude
generic functions).
DATA LS_EXCLUDE TYPE UI_FUNC.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_COPY_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_DELETE_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_APPEND_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_INSERT_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_MOVE_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_COPY.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_CUT.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_PASTE.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_PASTE_NEW_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_UNDO.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
ENDFORM.                               " EXCLUDE_TB_FUNCTIONS
*&      Form build_fieldcat
      Fieldcatalog
FORM BUILD_FIELDCAT .
DATA: L_POS TYPE I.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Delivery'(024).
X_FIELDCAT-FIELDNAME = 'VBELN'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-NO_ZERO    = 'X'.
X_FIELDCAT-OUTPUTLEN = '10'.
X_FIELDCAT-HOTSPOT = 'X'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Item'(025).
X_FIELDCAT-FIELDNAME = 'POSNR'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-OUTPUTLEN = '5'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Drop'(025).
X_FIELDCAT-FIELDNAME = 'DROP'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-OUTPUTLEN = '5'.
X_FIELDCAT-EDIT = 'X'.
X_FIELDCAT-DRDN_HNDL = '1'.
X_FIELDCAT-DRDN_ALIAS = 'X'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
ENDFORM.                    " build_fieldcat
*&      Module STATUS_0100 OUTPUT
      text
MODULE STATUS_0100 OUTPUT.
SET PF-STATUS 'MAIN100'.
SET TITLEBAR 'MAIN100'.
IF G_CUSTOM_CONTAINER IS INITIAL.
**Initializing the grid and calling the fm to Display the O/P
    PERFORM CREATE_AND_INIT_ALV.
ENDIF.
ENDMODULE.                 " STATUS_0100 OUTPUT
*&      Module USER_COMMAND_0100 INPUT
      text
MODULE USER_COMMAND_0100 INPUT.
CASE SY-UCOMM.
    WHEN 'BACK'.
      LEAVE TO SCREEN 0.
ENDCASE.
ENDMODULE.                 " USER_COMMAND_0100 INPUT
there are many such examples
goto->se38->type bcalv* and press f4, u can see many examples.
Reward points if helpful.
Thanks and regards
Swetha Singh.

Jsp inputfield - Event Handling examples

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