Handle events in global class

Hi all,
I am working on handling events in global classes.
but my event is not triggererd,i m not able to find where it's going wrong.
Below is my code.
Global Class:ZCL_TEST_EVENT
events :EXCEEDEDRANGE
methods:CHECKRANGE,DISPLAYVENDOR.
Checkrange is event handler for exceededrange.
below is the code for methods.
method checkrange.
write:/ 'Vendor not within the range'(001).
exit.
endmethod.
method displayvendor.
DATA : exlfa1 TYPE lfa1.
IF imlifnr NOT BETWEEN 1000 AND 2000.
    RAISE EVENT exceededrange.
ENDIF.
SELECT SINGLE * FROM lfa1
       INTO exlfa1
    WHERE lifnr = imlifnr
IF sy-subrc = 0.
    WRITE : / exlfa1-lifnr,exlfa1-name1.
ELSE.
    WRITE : / 'No vendor found'(002).
ENDIF.
endmethod.
below is the report I developed.
REPORT ztest_113.
parameters :plifnr type lfa1-lifnr obligatory.
data : obj type ref to ZCL_TEST_EVENT.
START-OF-SELECTION.
CREATE OBJECT obj.
CALL METHOD obj->displayvendor
EXPORTING
    imlifnr = plifnr
Please help

Yes, you do need to write the SET HANDLER statement. As per your current design, you can set the event handler in your method CONSTRUCTOR. Like:
method constructor.
SET HANDLER me->CHECKRANGE FOR me.
endmethod.
Regards,
Naimesh Patel

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Hello Reema
The following sample report shows how to handle event in principle (see the § marks)..
The following sample report show customer data ("Header"; KNB1) in the first ALV list and sales areas ("Detail"; KNVV) for the selected customer (event double-click) in the second ALV list.
*& Report ZUS_SDN_TWO_ALV_GRIDS
REPORT zus_sdn_two_alv_grids.
DATA:
gd_okcode        TYPE ui_func,
go_docking       TYPE REF TO cl_gui_docking_container,
go_splitter      TYPE REF TO cl_gui_splitter_container,
go_cell_top      TYPE REF TO cl_gui_container,
go_cell_bottom   TYPE REF TO cl_gui_container,
go_grid1         TYPE REF TO cl_gui_alv_grid,
go_grid2         TYPE REF TO cl_gui_alv_grid,
gs_layout        TYPE lvc_s_layo.
DATA:
gt_knb1          TYPE STANDARD TABLE OF knb1,
gt_knvv          TYPE STANDARD TABLE OF knvv.
"§1. Define and implement event handler method
"     (Here: implemented as static methods of a local class)
*       CLASS lcl_eventhandler DEFINITION
CLASS lcl_eventhandler DEFINITION.
PUBLIC SECTION.
    CLASS-METHODS:
      handle_double_click FOR EVENT double_click OF cl_gui_alv_grid
        IMPORTING
          e_row
          e_column
          es_row_no
          sender.
ENDCLASS.                    "lcl_eventhandler DEFINITION
*       CLASS lcl_eventhandler IMPLEMENTATION
CLASS lcl_eventhandler IMPLEMENTATION.
METHOD handle_double_click.
*   define local data
    DATA:
      ls_knb1      TYPE knb1.
    CHECK ( sender = go_grid1 ).
    READ TABLE gt_knb1 INTO ls_knb1 INDEX e_row-index.
    CHECK ( ls_knb1-kunnr IS NOT INITIAL ).
    CALL METHOD go_grid1->set_current_cell_via_id
      EXPORTING
*        IS_ROW_ID    =
*        IS_COLUMN_ID =
        is_row_no    = es_row_no.
*   Triggers PAI of the dynpro with the specified ok-code
    CALL METHOD cl_gui_cfw=>set_new_ok_code( 'DETAIL' ).
ENDMETHOD.                    "handle_double_click
ENDCLASS.                    "lcl_eventhandler IMPLEMENTATION
START-OF-SELECTION.
SELECT        * FROM knb1 INTO TABLE gt_knb1
         WHERE bukrs = '1000'.
* Create docking container
CREATE OBJECT go_docking
    EXPORTING
      parent                      = cl_gui_container=>screen0
      ratio                       = 90
    EXCEPTIONS
      OTHERS                      = 6.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Create splitter container
CREATE OBJECT go_splitter
    EXPORTING
      parent            = go_docking
      rows              = 2
      columns           = 1
*      NO_AUTODEF_PROGID_DYNNR =
*      NAME              =
    EXCEPTIONS
      cntl_error        = 1
      cntl_system_error = 2
      OTHERS            = 3.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Get cell container
CALL METHOD go_splitter->get_container
    EXPORTING
      row       = 1
      column    = 1
    RECEIVING
      container = go_cell_top.
CALL METHOD go_splitter->get_container
    EXPORTING
      row       = 2
      column    = 1
    RECEIVING
      container = go_cell_bottom.
* Create ALV grids
CREATE OBJECT go_grid1
    EXPORTING
      i_parent          = go_cell_top
    EXCEPTIONS
      OTHERS            = 5.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
"§2. Set event handler (after creating the ALV instance)
SET HANDLER: lcl_eventhandler=>handle_double_click FOR go_grid1. " Or:
" SET HANDLER: lcl_eventhandler=>handle_double_click FOR all instances.
CREATE OBJECT go_grid2
    EXPORTING
      i_parent          = go_cell_bottom
    EXCEPTIONS
      OTHERS            = 5.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Display data
gs_layout-grid_title = 'Customers'.
CALL METHOD go_grid1->set_table_for_first_display
    EXPORTING
      i_structure_name = 'KNB1'
      is_layout        = gs_layout
    CHANGING
      it_outtab        = gt_knb1
    EXCEPTIONS
      OTHERS           = 4.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
gs_layout-grid_title = 'Customers Details (Sales Areas)'.
CALL METHOD go_grid2->set_table_for_first_display
    EXPORTING
      i_structure_name = 'KNVV'
      is_layout        = gs_layout
    CHANGING
      it_outtab        = gt_knvv " empty !!!
    EXCEPTIONS
      OTHERS           = 4.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Link the docking container to the target dynpro
CALL METHOD go_docking->link
    EXPORTING
      repid                       = syst-repid
      dynnr                       = '0100'
*      CONTAINER                   =
    EXCEPTIONS
      OTHERS                      = 4.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* NOTE: dynpro does not contain any elements
CALL SCREEN '0100'.
* Flow logic of dynpro (does not contain any dynpro elements):
*PROCESS BEFORE OUTPUT.
* MODULE STATUS_0100.
*PROCESS AFTER INPUT.
* MODULE USER_COMMAND_0100.
END-OF-SELECTION.
*&      Module STATUS_0100 OUTPUT
*       text
MODULE status_0100 OUTPUT.
SET PF-STATUS 'STATUS_0100'. " contains push button "DETAIL"
* SET TITLEBAR 'xxx'.
* Refresh display of detail ALV list
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*    EXPORTING
*      IS_STABLE      =
*      I_SOFT_REFRESH =
    EXCEPTIONS
      OTHERS         = 2.
IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDMODULE.                 " STATUS_0100 OUTPUT
*&      Module USER_COMMAND_0100 INPUT
*       text
MODULE user_command_0100 INPUT.
CASE gd_okcode.
    WHEN 'BACK' OR
         'END' OR
         'CANC'.
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*   User has pushed button "Display Details"
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    WHEN OTHERS.
ENDCASE.
CLEAR: gd_okcode.
ENDMODULE.                 " USER_COMMAND_0100 INPUT
*&      Form ENTRY_SHOW_DETAILS
*       text
* --> p1        text
* <-- p2        text
FORM entry_show_details .
* define local data
DATA:
    ld_row      TYPE i,
    ls_knb1     TYPE knb1.
CALL METHOD go_grid1->get_current_cell
    IMPORTING
      e_row = ld_row.
READ TABLE gt_knb1 INTO ls_knb1 INDEX ld_row.
CHECK ( syst-subrc = 0 ).
SELECT        * FROM knvv INTO TABLE gt_knvv
         WHERE kunnr = ls_knb1-kunnr.
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Regards
Uwe

Global class event handler not called

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DATA: begin OF o_ref2,
CONTACTID               TYPE CT_CONTACT,
P_INSTANCES             TYPE string,
P_CONTEXT               TYPE CT_BPCCONF,
P_CONTROL               TYPE ISU_OBJECT_CONTROL_DATA,
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I now have the following code. But when I check for syntax I get different error. They are at the end of the list.
Here is the code the way it stands now:
================================================
***Use global class CL_ISU_CUSTOMER_CONTACT
DATA: oref TYPE REF TO CL_ISU_CUSTOMER_CONTACT.
DATA: dref_tab LIKE TABLE OF oref.
DATA: begin OF oref2,
CONTACTID TYPE CT_CONTACT,
P_INSTANCES TYPE string,
P_CONTEXT TYPE CT_BPCCONF,
P_CONTROL TYPE ISU_OBJECT_CONTROL_DATA,
P_DATA TYPE BCONTD,      "THIS IS A STRUCTURE CONTAINING OTHER DATA ELEMENTS
P_NOTICE TYPE EENOT_NOTICE_AUTO,
P_OBJECTS TYPE BAPIBCONTACT_OBJECT_TAB,
P_OBJECTS_WITH_ROLES TYPE BAPIBCONTACT_OBJROLE_TAB,
end of oref2.
TRY.
CALL METHOD CL_ISU_CUSTOMER_CONTACT=>SELECT     " STATIC METHODE & PUBLIC VISIBILITY
EXPORTING
X_CONTACTID = '000001114875' "Whatever value here
RECEIVING
Y_CONTACTLOG = oref
ENDTRY.
field-symbols: <FS1>      type any table,
               <wa_oref2> type any.
create data dref_tab type handle oref.   " <<===ERROR LINE
assign dref->* to <FS1>.
Loop at <FS1> assigning <wa_oref2>.
*use <wa_orfe2> to transfer into oref2.
endloop.
write: / 'hello'.
=========================================
Here are the errors I get:
The field "DREF" is unknown, but there is a field with the similar name "OREF" . . . .
When I replace itr by OREF I get:
"OREF" is not a data reference variable.
I then try to change it to dref_tab. I get:
"DREF_TAB" is not a data reference variable.
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Greetings,
Using VS 2008 -VSTO - Word 2007 Add-In wizard.
Is there a way to add your own global references to the system generated Globals internal class? For example, I'd like to keep track of the document opened during a session. if an event handler gets a reference to the document deep clones it and adds it to a hash structure, I'd like this "structure" to be stored under the Global internal class.
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EXPORTING
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METHOD constructor.
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Method 1
Write annonymus inner classes in the same class
Method 2
=======
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hi,
Hi,
I am displaying some fields from VBAP in ALV gid and have give drop down check box to storage location making it editable so if the user changes Storage location of
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LOCAL CLASSES: Definition
class lcl_event_receiver: local class to handle event CLASS lcl_event_receiver DEFINITION.
PUBLIC SECTION.
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         FOR EVENT data_changed OF cl_gui_alv_grid
             IMPORTING er_data_changed.
PRIVATE SECTION.
ENDCLASS.                    "lcl_event_receiver DEFINITION
LOCAL CLASSES: Implementation
class lcl_event_receiver (Implementation)
CLASS lcl_event_receiver IMPLEMENTATION.
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    DATA: l_error_in_data TYPE c.
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*§7.Display application log if an error has occured.
    IF l_error_in_data EQ 'X'.
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    ENDIF.
ENDMETHOD.                    "handle_data_changed
ENDCLASS.                    "lcl_event_receiver IMPLEMENTATION
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     Identify columns which were changed and check input
     -->P_ER_DATA_CHANGED text
FORM handle_data_changed USING p_er_data_changed
                          TYPE REF TO cl_alv_changed_data_protocol
                          p_error_in_data TYPE c.
DATA : lw_mod_cell TYPE lvc_s_modi ,
         l_value TYPE lvc_value ,
         l_lgort TYPE lgort_d.
SORT p_er_data_changed->mt_mod_cells BY row_id .
LOOP AT p_er_data_changed->mt_mod_cells INTO lw_mod_cell
                          WHERE fieldname = 'LGORT'.
    CALL METHOD p_er_data_changed->get_cell_value
      EXPORTING
        i_row_id    = lw_mod_cell-row_id
        i_fieldname = 'LGORT'
      IMPORTING
        e_value     = l_value.
    SELECT SINGLE lgort FROM t001l INTO l_lgort WHERE werks = p_werks
                                                AND   lgort = l_value.
    IF sy-subrc NE 0.
In case of error, create a protocol entry in the *application log.
      CALL METHOD p_er_data_changed->add_protocol_entry
        EXPORTING
          i_msgid     = '0K'
          i_msgno     = '000'
          i_msgty     = 'E'
          i_msgv1     = text-003
          i_msgv2     = l_value
          i_msgv3     = text-004
          i_fieldname = lw_mod_cell-fieldname
          i_row_id    = lw_mod_cell-row_id.
      p_error_in_data = 'X'.
      EXIT.
    ELSE.
*§5b.If the value is valid change values of
   cells.
      CALL METHOD p_er_data_changed->modify_cell
        EXPORTING
          i_row_id    = lw_mod_cell-row_id
          i_fieldname = lw_mod_cell-fieldname
          i_value     = l_value.
      READ TABLE t_list1 INTO w_list1 INDEX lw_mod_cell-row_id.
      IF sy-subrc EQ 0.
*comparing old value with the changed value
        IF w_list1-lgort <> l_value.
          MOVE:      w_list1-werks TO w_list3-werks,
                     w_list1-matnr TO w_list3-matnr,
                     w_list1-arktx TO w_list3-arktx,
                     w_list1-vbeln TO w_list3-vbeln,
                     w_list1-posnr TO w_list3-posnr,
                     w_list1-pstyv TO w_list3-pstyv,
                     w_list1-vstel TO w_list3-vstel,
                     w_list1-auart TO w_list3-auart,
                     w_list1-kwmeng TO w_list3-kwmeng,
                     w_list1-vrkme TO w_list3-vrkme,
                     w_list1-mbdat TO w_list3-mbdat,
                     l_value        TO w_list3-lgort.
          APPEND w_list3 TO t_list3.
*t_list3 will contain all the records that are changed
          CLEAR w_list3.
        ENDIF.
      ENDIF.
    ENDIF.
ENDLOOP.
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      text
MODULE status_0100 OUTPUT.
SET PF-STATUS 'MAIN100'.
SET TITLEBAR 'MAIN100'.
IF go_custom_container IS INITIAL.
create a custom container control for our ALV Control
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      EXPORTING
        container_name              = g_cont_on_main
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                cntl_error = 1
                cntl_system_error = 2
                create_error = 3
                lifetime_error = 4
                lifetime_dynpro_dynpro_link = 5.
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          txt2 = sy-subrc
          txt1 = 'The control could not be created'.
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      EXPORTING
        i_parent          = go_custom_container.
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    IF ( p_chng = 'X' OR p_disp = 'X' ) .
Set a titlebar for the grid control
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      g_layout-excp_fname = 'TRAFFIC_LIGHT'.
Define a drop down table.
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      CALL METHOD go_grid->set_table_for_first_display
        EXPORTING
          is_layout                     = g_layout
        CHANGING
          it_outtab                     = t_list1
          it_fieldcatalog               = t_fieldcat1
        EXCEPTIONS
          invalid_parameter_combination = 1
          program_error                 = 2
          too_many_lines                = 3
          OTHERS                        = 4.
      IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
      ENDIF.
    ENDIF.
register ENTER and CURSOR to raise event DATA_CHANGED.
(Per default the user may check data by using the check icon).
    CALL METHOD go_grid->register_edit_event
      EXPORTING
        i_event_id = cl_gui_alv_grid=>mc_evt_enter.
    CALL METHOD go_grid->register_edit_event
      EXPORTING
        i_event_id = cl_gui_alv_grid=>mc_evt_modified.
    CREATE OBJECT g_event_receiver.
    SET HANDLER g_event_receiver->handle_double_click FOR go_grid.
    SET HANDLER g_event_receiver->handle_hotspot_click FOR go_grid .
    SET HANDLER g_event_receiver->handle_data_changed FOR go_grid .
ENDIF.
CALL METHOD cl_gui_control=>set_focus
    EXPORTING
      control = go_grid.
ENDMODULE.                 " STATUS_0100 OUTPUT
*&      Module USER_COMMAND_0100 INPUT
      text
MODULE user_command_0100 INPUT.
ok_code = sy-ucomm.
CASE ok_code.
    WHEN 'EXIT'.
      PERFORM exit_program.
    WHEN 'SAVE'.
      PERFORM update_sales_order using t_list3[].
endcase.
Thanks in Advance,
Siri

Hi Sirisha,
          You can get the event code for Enter because you have regitered in the event reciever .
But for the SAVE you will have to set in the PF-status of the screen and not the ALV-grid save .
Please award if helpful.

Major global classes used in abap objects

Hi,
I am new to the abap objects and till now i am to understand that the role of the global classes are important in the abap object program. I had tried to search on the net but i was not able to get the desired result.
I want to know which are the major global classes which are used in the ABAP objects.
Plzz provide me guidelines for it.

Ricx,
It depends on your requirement.
For alv's we use these global classes. For Webdynpro related alv we use different global classes.
CL_GUI_ALV_GRID (List Viewer)
CL_GUI_ALV_GRID_BASE (Basis Class for ALV grid)
CL_GUI_ALV_TREE (ALV Tree Control)
CL_GUI_ALV_TREE_SIMPLE (Simple ALV Tree)
CL_ALV_TABLE_CREATE (Dynamic Creation of ALV Data Table)
CL_ALV_TREE_BASE (Basis Class ALV Tree Control)
CL_CK_ALVTREE_NKEY_2_OBJECT (Converter Node Key Object)
CL_ALV_EVENT_DATA (Changing Data Container for Events)
CL_ALV_EVENT_TOOLBAR_SET (ALV Context menu)
Regards,
Arun.

Listen for event in own class?

Hi
I dispatch events from models to classes listening. How do you set up an event and listener in the same class?
Eg for the former - a model "MyModel" to class - it's:
public static const MY_VAR:String = "myVar";
triggered by...
dispatchEvent(new Event(MY_VAR));
picked up in another class by...
modelVar.addEventListener(MyModel.MY_VAR, doSomething);
but what if the class that's dispatching also has the listener?
So if MyClass is dispatching the event, along the lines of...
addEventListener(MyClass.MY_VAR, doSomething);
Cheers for taking a look

Very often I'm waiting for a few key items before I can finally do something else. Setting simple flags or checking nulls can help with this.
Often I download multiple data structures (JSON/XML/etc) and I need all of them before I can parse them because the co-depend on each other. URLLoaders finish at different times so I just set a flag for what I need but check if all are complete before I continue each time one finishes.
e.g.
package
     public class IHateWaiting extends EventDispatcher
          public static const MY_VAR:String = "myVar";
          private var _xmlA:XML;
          private var _xmlB:XML;
          public function IHateWaiting()
               // load A
               var ulA:URLLoader = new URLLoader();
               ulA.addEventListener(Event.COMPLETE, _handleFinishedF);
               ulA.load(new URLRequest("http://www.example.com/a.xml"));
               // load B
               var ulB:URLLoader = new URLLoader();
               ulB.addEventListener(Event.COMPLETE, _handleFinishedF);
               ulB.load(new URLRequest("http://www.example.com/b.xml"));
               // listen to self
               addEventListener(IHateWaiting.MY_VAR, _handleAppEventF);
          private function _handleFinishedF(e:Event):void
               if (e.type == Event.COMPLETE)
                    var data:XML = XML(e.target.data);
                    // A or B? any way you can tell
                    if (data.A.length() > 0) _xmlA = data;
                    else if (data.B.length() > 0) _xmlB = data;
                    // event method (requires extra handler or a fake event)
                    if (_xmlA && _xmlB) dispatchEvent(new Event(IHateWaiting.MY_VAR));
                    // preferred direct reference, no handler needed
                    // if (_xmlA && _xmlB) _parseXML();
          private function _handleAppEventF(e:Event):void
               if (e.type == IHateWaiting.MY_VAR) _parseXML();
          private function _parseXML():void
                // parse XML
I recommend the reference version from post #2. It's cleaner because you don't need to double up on functions (handler->reference) like you see above with dispatching. The only purpose for _handleAppEventF() in this case is just to run _parseXML(), which is a useless duplicate function.
I've always kept my handlers free of model-esque logic, so you see me calling a different function from that handler, _parseXML(). This is just because I want my handlers to only handle events and then hand off the work elsewhere.
Instead of dispatching the event, I agree with moccamaximum, run the method directly. Even if it's 2 lines of code to do 1 thing, I think the clarity of it is much cleaner coding. So I would recommend nuking the self-listener in the constructor above. When I have all the data I'm looking for, I'd run the methods in the class directly and If the parent needs to know, I'd dispatch when they complete.
e.g.
          private function _handleFinishedF(e:Event):void
               if (e.type == Event.COMPLETE)
                    var data:XML = XML(e.target.data);
                    // A or B? any way you can tell
                    if (data.A.length() > 0) _xmlA = data;
                    else if (data.B.length() > 0) _xmlB = data;
                    if (_xmlA && _xmlB)
                         // parse first (synchronous)
                         _parseXML();
                         // xml ready, dispatch to parent
                         dispatchEvent(new Event(IHateWaiting.MY_VAR));

How to handle events between two custom components?

Hi ,
i want to handle events between two custom components, example if an event is generated in one custom component ,and i want to handle it any where in the application.....can any one suggest me any tutorial or meterial in this concept...
thanks

Events don't really go sideways in ActionScript by default. They bubble upward. If you want to send an event sideways, you will probably have to coordinate with something higher up in the event hierarchy. You can send the event to a common ancestor, and then pass it down the hierarchy as a method argument.
Another option is to use a framework that supports Injection. There are a number around these days. The one I'm most familiar with is Mate, which allows you to handle events and inject data in MXML. Mate is meant to be used as an MVC framework, and you may want to look into it if your application is complex, but you can also use it to coordinate global event handling if you don't need that level of structure.

Handeling listner and window events in another class

All if i have my one class that defines a JPanel how i put my listner events into another class.
so if i had
     import javax.swing.*;
     class MyFrame extends JFrame {
       public MyFrame() {
          setTitle("My Empty Frame");
          setSize(300,200); // default size is 0,0
          setLocation(10,200); // default is 0,0 (top left corner)
       public static void main(String[] args) {
         JFrame f = new MyFrame();
         f.show();
     }And then in a class WindowEvents.class i wanted to have all of the actions for any buttons
etc. How do i interface that with the main JPanel or JFrame

I would make another class, for instance if you were doing an ActionListener event, you'd have a seperate class such as,
public class ButtonHandler implements ActionListener {
private YourPanelClass view;
public ButtonHandler(YourPanelClass view) {
        this.view = view;
public void actionPerformed(ActionEvent e) {
//event handling code
view.updateGUI();
}Then in your main frame class, you'd want an updateGUI(); method which would perform the actions required and to add the event to your button you'd do something like this:
ImageIcon upIcon = new ImageIcon("navigationIcons/Up24.gif", "Up Button");
        JButton upBtn = new JButton(upIcon);
        upBtn.setToolTipText("Up");
        UpdateButtonHandler ubh = new UpdateButtonHandler(this);
        upBtn.setActionCommand("bob");
        upBtn.addActionListener(ubh);I'm actually having a simular problem to you, where as I have 1 class for my main frame, one class for my button panel with the buttons on and 1 class for my graphics cpt which im moving about via pressing the buttons. Then another class for my actionListener event, im finding it hard to get the event to work correctly because the updateGUI(); method theoretically needs to be placed inside my button panel class, but if I do that I can't seem to update the graphics cpt properly to actually move it, unless I do it in the main frame class which then means I can't have a seperate class for my button panel. Anyone got any ideas on a solution?

Handle events in global class

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