Event Handling Techniques with MVC
Hello all,
I have a situation where I have a model that can be thought of like a graph with many nodes and edges. I would like to create a view of this model with a customized JLabel that shows a data value for each node and edge in the model. The event handling to accomplish this has left me a bit perplexed, though. On one hand I was considering something similar to the following:
// a dedicated listener for each label
MyLabel mylabels[] = new MyLabel[numLabels];
for(int i = 0; i != mylabels.length; i++){
MyEventHandler eh = new MyEventHandler(mylabels);
mylabel.addMouseListener(eh);
public class MyEventHandler extends MouseAdapter{
private MyLabel label;
public void mouseClicked(MouseEvent e){
label.setText(etc...);
// at this point I would want to set the value of the point or edge
// that this label corresponds to, not sure of the best strategy
// here either
etc...
The other technique that I am considering might look similar to the following:
// only one listener for all labels
MyLabel mylabels[] = new MyLabel[numLabels];
MyEventHandler eh = new MyEventHandler();
for(int i = 0; i != mylabels.length; i++){
mylabel.addMouseListener(eh);
public class MyEventHandler extends MouseAdapter{
public void mouseClicked(MouseEvent e){
//call a control object in MVC architecture, for more processing
control.update(e.getSource(), (String)input);
etc...
// in the control object class
public void update(Object eventSource, String input){
MyLabel source = (MyLabel)eventSource;
source.setText(input);
// the label would have some kind of index to indicate which one it is
model.setData(source.getIndex(), input);
I am interested in knowing any accepted/popular solutions to situations like this. Are either of my samples worth implementing? I would greatly appreciate any suggestions. Thanks.
I would recommend creating a single listener and add it to every label added to the graph. If you're interested in events that occur outside of the labels (in the background), add a listener to the container of the labels as well.
Unfortunately, you cannot simply add a listener to the container and get all the mouse events from the container's children because Swing's event dispatching system will only dispatch mouse events to a container if the click location was not within any of the container's children. This means that mouse listeners registered to a container will only receive mouse events within the container's background.
Similar Messages
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OIM 10g Event Handler : Integrated with User Groups.User Members
I have created custom event handler and integrated it with User Groups.User Members data object.
here is my code od event handler class:
public class GroupEventHandler extends tcBaseEvent {
public GroupEventHandler() {
this.setEventName("Event Handler Sample");
protected void implementation() throws Exception {
System.out.println("============@@@@@@@@ IN EVENT HANDLER ");
try
String groupKey = this.getDataObject().getString("Groups.Key");
writeToFile(groupKey);
catch (Exception e)
e.printStackTrace();
But I am getting this exception :
ERROR [ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)' XELLERATE.SERVER - Class/Method: tcTableDataObj/getString encounter some problems: Column 'GROUPS.KEY' not found
com.thortech.xl.dataaccess.tcDataSetException: Column 'GROUPS.KEY' not found
at com.thortech.xl.dataaccess.tcDataSet.getColumnIndex(Unknown Source)
at com.thortech.xl.dataaccess.tcDataSet.getString(Unknown Source)
at com.thortech.xl.dataobj.tcTableDataObj.getString(Unknown Source)
at oim.GroupEventHandler.implementation(GroupEventHandler.java:19)
at com.thortech.xl.client.events.tcBaseEvent.run(Unknown Source)
at com.thortech.xl.dataobj.tcDataObj.runEvent(Unknown Source)
at com.thortech.xl.dataobj.tcDataObj.eventPostInsert(Unknown Source)
at com.thortech.xl.dataobj.tcUSG.eventPostInsert(Unknown Source)
at com.thortech.xl.dataobj.tcDataObj.insert(Unknown Source)
at com.thortech.xl.dataobj.tcDataObj.save(Unknown Source)
at com.thortech.xl.dataobj.tcTableDataObj.save(Unknown Source)
at com.thortech.xl.ejb.beansimpl.tcGroupOperationsBean.addMemberUsers(Unknown Source)
at com.thortech.xl.ejb.beans.tcGroupOperationsSession.addMemberUsers(Unknown Source)
at com.thortech.xl.ejb.beans.tcGroupOperations_ejm77u_EOImpl.addMemberUsers(tcGroupOperations_ejm77u_EOImpl.java:1671)
at Thor.API.Operations.tcGroupOperationsClient.addMemberUsers(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at Thor.API.Base.SecurityInvocationHandler$1.run(Unknown Source)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.security.Security.runAs(Security.java:41)
at Thor.API.Security.LoginHandler.weblogicLoginSession.runAs(Unknown Source)
at Thor.API.Base.SecurityInvocationHandler.invoke(Unknown Source)
at $Proxy66.addMemberUsers(Unknown Source)
at com.thortech.xl.webclient.actions.UserGroupMembersAction.assignMemberUsers(Unknown Source)
at com.thortech.xl.webclient.actions.UserGroupMembersAction.assignGroupMembers(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
at com.thortech.xl.webclient.actions.tcLookupDispatchAction.execute(Unknown Source)
at com.thortech.xl.webclient.actions.tcActionBase.execute(Unknown Source)
at com.thortech.xl.webclient.actions.tcAction.execute(Unknown Source)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.thortech.xl.webclient.security.SecurityFilter.doFilter(Unknown Source)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3592)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2202)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2108)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1432)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)Anyone have idea about why "Groups.Key" not found exception thrown here..
I have assigned this event handler at postinsert event of User Groups.User Members Data Object. -
Event handler - open with explorer issue
hi all,
I have developed an event handler (itemadded syncronuos) for a library. i need to populate title field
public override void ItemAdded(SPItemEventProperties properties)
base.ItemAdded(properties);
properties.ListItem["Title"] = "some value"
properties.ListItem.SystemUpdate();
I have deployed the same feature to 2 environments -> Dev Env, Test Env.
when I copy and paste a pdf file with "Open with explorer" in Dev Env it works fine.
when I do the same in Test Env i can't copy the file and i get this error:
Error 0x80070057: the parameter is incorrect.
I see this in my Event Viewer
The description for Event ID 14901 from source WebClient cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
Could you help me?
Thanks.
On your local machine you are as you on the server, are you try it on the test server or browsing the test environment from local machine and doing the copy from local machine. also i hope your event handler is not firing on all the list, just make
sure. You can try this in a different library..create a fresh library and see what happen without event handler.
Mark ANSWER if this reply resolves your query, If helpful then VOTE HELPFUL
INSQLSERVER.COM
Mohammad Nizamuddin -
Is event handling possible with any object?
can i set a event notification to any object? say for example if i have a multidimensional array of strings can i associate a event handler with it so that when a different application or part of a code changes it's contents i can fire a method?
consider the scenario
initially...
String userId[][]=new String[R][C];
public MyServer()
userId[0][0] = "mr00047";
userId[0][1] = "false";
userId[1][0] = "dider7";
userId[1][1] = "false";
userId[2][0] = "thegreendove";
userId[2][1] = "false";
}now at some point the content of the userId array changes
for(int i=0;i<3;i++)
if(temp.equals(MyServer.userId[0]))
flag=true;
MyServer.userId[i][1]="true"; // I want to fire a method from this point
break;
can any body tell me how can i do it? please help!!!This could help you: http://java.sun.com/j2se/1.5.0/docs/api/java/util/Observable.html
-
Hi All,
I have encountered some code which takes a somewhat different approach to event handling that I have used previously.
This is a basic example of the principles:
private final static String = "CMD_ONE";
private final static String = "CMD_TWO";
private final static String = "CMD_THREE";
EventHandler eventHanlder = new EventHandler();
JButton one = new JButton();
one.addActionCommand(CMD_ONE);
one.addActionListener(eventHandler);
JButton two = new JButton();
two.addActionCommand(CMD_TWO);
two.addActionListener(eventHandler);
JButton three = new JButton();
three.addActionCommand(CMD_THREE);
three.addActionListener(eventHandler);
class EventHandler implements ActionListener
public void actionPerformed(ActionEvent ev)
if(ev.getActionCommand().compareTo(CMD_ONE) = 0)
System.out.println("User hit the ONE button");
if(ev.getActionCommand().compareTo(CMD_TWO) = 0)
System.out.println("User hit the TWO button");
if(ev.getActionCommand().compareTo(CMD_THREE) = 0)
System.out.println("User hit the TWO button");
My question is what could the motivation for this approach be? Is it to save on memory by having fewer EventListener objects instantiated (presumably).
Is this necessarily a better approach than having a dedicated EventListener for each separate component.
I always thought that the idea was to minimise the amount of processing for any event so that the UI was very reactive to user input (by having dedicated EventListeners). I can see that this approach could suffer
in a situation with the EventHandler being responsible for many components i.e. Having to evaluate a big list of expressions because of the number of delegated commands.
I would very much like to know if anyone has any strong views on this or if anyone knows the Sun guidance on this matter.
Thanks for any replies,
Jonathan.I would recommend creating a single listener and add it to every label added to the graph. If you're interested in events that occur outside of the labels (in the background), add a listener to the container of the labels as well.
Unfortunately, you cannot simply add a listener to the container and get all the mouse events from the container's children because Swing's event dispatching system will only dispatch mouse events to a container if the click location was not within any of the container's children. This means that mouse listeners registered to a container will only receive mouse events within the container's background. -
Event handling, incrementing with buttons
Hey
struggling a little and hope someone out there might be able to help out
i need to find out how to make a new line appear everytime a button is pressed, the lines are all exactly the same length, just in a different position to the last
the lines are identical and just trying to show a zig zag path.
thanks in advancePlease post an SSCCE*. It's not clear that you're even talking about Java.
* http://mindprod.com/jgloss/sscce.html
~ -
Help needed in implementing validation event handler in OIM 11g
Hello experts,
I am trying to set username policy by implementing a validation event handler in OIM 11.1.1.5.
Following are the steps followed
1. Import metadata
Created a file called Eventhandler.xml as below and imported using weblogicImportmetadata.sh
<?xml version='1.0' encoding='UTF-8'?>
<eventhandlers xmlns="http://www.oracle.com/schema/oim/platform/kernel" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.oracle.com/schema/oim/platform/kernel orchestration-handlers.xsd">
<validation-handler class="test.iam.eventhandlers.CustomValidationEventHandler" entity-type="User" operation="CREATE" name="CustomValidationEventHandler" order="1000" sync="TRUE"/>
</eventhandlers>
2. Register plugin
plugin.xml
<?xml version="1.0" encoding="UTF-8"?>
<oimplugins xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<plugins pluginpoint="oracle.iam.platform.kernel.spi.ValidationHandler">
<plugin pluginclass="test.iam.eventhandlers.CustomValidationEventHandler" version="1.0" name="CustomValidationEventHandler" />
</plugins>
</oimplugins>
Just givng sys out in the below code to check whther it is getting triggerred during user create.
package test.iam.eventhandlers;
import java.util.HashMap;
import oracle.iam.platform.Platform;
import oracle.iam.platform.context.ContextAware;
import oracle.iam.platform.kernel.ValidationException;
import oracle.iam.platform.kernel.ValidationFailedException;
import oracle.iam.platform.kernel.spi.ValidationHandler;
import oracle.iam.platform.kernel.vo.BulkEventResult;
import oracle.iam.platform.kernel.vo.BulkOrchestration;
import oracle.iam.platform.kernel.vo.Orchestration;
public class CustomValidationEventHandler implements ValidationHandler {
@Override
public void initialize(HashMap<String, String> arg0) {
// TODO initialization
System.out.println("init validate event handler");
@Override
public void validate(long processId, long eventId, Orchestration orchestration)
throws ValidationException, ValidationFailedException {
System.out.println("Beginning of validation");
System.out.println("End of validation");
@Override
public void validate(long processId, long eventId, BulkOrchestration arg2)
throws ValidationException, ValidationFailedException {
// TODO - N/A
System.out.println("Bulk Orchestration not yet implemented");
Now when i create a user it is not allowing and i am getting system error in the front end and in the logs i could see something below
<May 28, 2012 3:03:29 PM CEST> <Error> <oracle.iam.identity.usermgmt.impl> <IAM-3050029> <The user cannot be created due to validation errors.
oracle.iam.platform.kernel.ValidationFailedException: Event handler CustomValidationEventHandler implemented using class/plug-test.iam.eventhandlers.CustomValidationEventHandler could not be loaded.
at oracle.iam.platform.kernel.impl.OrchProcessData.runValidationEvents(OrchProcessData.java:177)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.validate(OrchestrationEngineImpl.java:644)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.process(OrchestrationEngineImpl.java:497)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:444)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:378)
at oracle.iam.identity.usermgmt.impl.UserManagerImpl.create(UserManagerImpl.java:656)
at oracle.iam.identity.usermgmt.api.UserManagerEJB.createx(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
I have implemented preprocess and postprocess event handler before with similar kind of plugin registration, metadata import and everything worked fine. Not sure what is the problem here with validation event handler.
Thanks
DKInstead of registering the plug-in can u try placing it in the plugins folder under Oracle_IDM1/server folder.
at times restart is required. esp when the server is running in production mode.
Regards
user12841694 -
About CL_GUI_ALV_GRID's event-handling & PAI/PBO
Hi, all,
I met a problem when using CL_GUI_ALV_GRID's event-handling.
I created a simple event-handling-class with an event-handling-method for DOUBLE-CLICK event of CL_GUI_ALV_GRID. And the event-handling-method, only makes some changes to the contents of itab to be shown in ALV_GRID.
The problem is: In my idea, after event-dispatch and event-handling in PAI, subsequent PBO will be called. Since SET_TABLE_FOR_FIRST_DISPLAY is called in PBO, I would saw the changed itab shown. BUT, I saw the contents of the itab remaining unchanged.
* PAI module, DISPATCH the event
CASE OK_CODE.
WHEN OTHERS.
CALL METHOD cl_gui_cfw=>dispatch.
ENDCASE.
I debugged, and found that, after event-handling-method, PBO module doesn't execute.
That's my wondering, after the preceding PAI, shouldn't the subsequent PBO appear? OR is event-handling different from other user actions?
Many thanks.Hi,
for double click you need explicit handler ,
just check it.
REPORT ZTEST1234 MESSAGE-ID ZZ .
DATA: G_GRID TYPE REF TO CL_GUI_ALV_GRID, "First
G_GRID1 TYPE REF TO CL_GUI_ALV_GRID. "Second
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: OK_CODE LIKE SY-UCOMM,
SAVE_OK LIKE SY-UCOMM,
G_CONTAINER1 TYPE SCRFNAME VALUE 'TEST', "First Container
G_CONTAINER2 TYPE SCRFNAME VALUE 'TEST1',"Second container
GS_LAYOUT TYPE LVC_S_LAYO.
DATA:BEGIN OF ITAB OCCURS 0,
VBELN LIKE LIKP-VBELN,
POSNR LIKE LIPS-POSNR,
LFDAT like lips-vfdat,
BOX(1),
HANDLE_STYLE TYPE LVC_T_STYL,
END OF ITAB.
* 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,
**Handler to Check the Data Change
HANDLE_DATA_CHANGED FOR EVENT DATA_CHANGED
OF CL_GUI_ALV_GRID
IMPORTING ER_DATA_CHANGED
E_ONF4
E_ONF4_BEFORE
E_ONF4_AFTER,
**Double Click Handler
HANDLE_DOUBLE_CLICK FOR EVENT DOUBLE_CLICK OF CL_GUI_ALV_GRID
IMPORTING E_ROW E_COLUMN ES_ROW_NO.
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'.
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'.
MESSAGE I000 WITH 'Click on POSNR row number ' E_ROW.
"with this row num you can get the data
ENDIF.
ENDMETHOD. "handle_double_click
**Handle Data Change
METHOD HANDLE_DATA_CHANGED.
CALL METHOD G_GRID->REFRESH_TABLE_DISPLAY
EXCEPTIONS
FINISHED = 1
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.
ENDMETHOD. "HANDLE_DATA_CHANGED
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
G_CUSTOM_CONTAINER1 TYPE REF TO CL_GUI_CUSTOM_CONTAINER. "Container2
*- 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.
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.
"First Grid
CREATE OBJECT G_CUSTOM_CONTAINER
EXPORTING CONTAINER_NAME = G_CONTAINER1.
CREATE OBJECT G_GRID
EXPORTING I_PARENT = G_CUSTOM_CONTAINER.
"Second Grid
CREATE OBJECT G_CUSTOM_CONTAINER1
EXPORTING CONTAINER_NAME = G_CONTAINER2.
CREATE OBJECT G_GRID1
EXPORTING I_PARENT = G_CUSTOM_CONTAINER1.
* 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-BOX_FNAME = 'BOX'.
GS_LAYOUT-CTAB_FNAME = 'CELLCOLOR'.
GS_LAYOUT-STYLEFNAME = 'HANDLE_STYLE'.
CALL METHOD G_GRID->REGISTER_EDIT_EVENT
EXPORTING
I_EVENT_ID = CL_GUI_ALV_GRID=>MC_EVT_MODIFIED.
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->HANDLE_DATA_CHANGED FOR G_GRID.
data: ls_outatb like line of itab,
v_index type sy-tabix.
DATA: LS_EDIT TYPE LVC_S_STYL,
LT_EDIT TYPE LVC_T_STYL.
LOOP AT ITAB INTO ls_outatb WHERE POSNR = '000010'.
V_INDEX = SY-TABIX.
LS_EDIT-FIELDNAME = 'VBELN'.
LS_EDIT-STYLE = CL_GUI_ALV_GRID=>MC_STYLE_DISABLED.
LS_EDIT-STYLE2 = SPACE.
LS_EDIT-STYLE3 = SPACE.
LS_EDIT-STYLE4 = SPACE.
LS_EDIT-MAXLEN = 8.
INSERT LS_EDIT INTO TABLE LT_EDIT.
INSERT LINES OF LT_EDIT INTO TABLE ls_outatb-handle_style.
MODIFY ITAB INDEX V_INDEX FROM ls_outatb TRANSPORTING
HANDLE_STYLE.
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.
* 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.
CALL METHOD G_GRID->REGISTER_EDIT_EVENT
EXPORTING
I_EVENT_ID = CL_GUI_ALV_GRID=>MC_EVT_MODIFIED.
**Calling the Method for ALV output for First Grid
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[].
**Calling the Method for ALV output for Second Grid
CALL METHOD G_GRID1->SET_TABLE_FOR_FIRST_DISPLAY
* EXPORTING
* IT_TOOLBAR_EXCLUDING = LT_EXCLUDE
CHANGING
IT_FIELDCATALOG = IT_FIELDCAT
IT_OUTTAB = ITAB[].
* 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 = 'ITAB'.
X_FIELDCAT-COL_POS = L_POS.
X_FIELDCAT-NO_ZERO = 'X'.
X_FIELDCAT-EDIT = 'X'.
X_FIELDCAT-OUTPUTLEN = '10'.
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 = 'ITAB'.
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 = 'Del Date'(015).
X_FIELDCAT-FIELDNAME = 'LFDAT'.
X_FIELDCAT-TABNAME = 'ITAB'.
X_FIELDCAT-COL_POS = L_POS.
X_FIELDCAT-OUTPUTLEN = '10'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
L_POS = L_POS + 1.
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
Regards
vijay -
Hello all,
I have a problem with event handling. I have two buttons in my GUI application with the same name.They are instance variables of two different objects of the same class and are put together in the one GUI.And their actionlisteners are registered with the same GUI. How can I differentiate between these two buttons?
To be more eloborate here is a basic definition of my classes
class SystemPanel{
SystemPanel(FTP ftp){ app = ftp};
FTP app;
private JButton b = new JButton("ChgDir");
b.addActionListener(app);
class FTP extends JFrame implements ActionListener{
SystemPanel rem = new SystemPanel(this);
SystemPanel loc = new SystemPanel(this);
FTP(){
add(rem);
add(loc);
pack();
show();
void actionPerformed(ActionEvent evt){
/*HOW WILL I BE ABLE TO KNOW WHICH BUTTON WAS PRESSED AS THEY
BOTH HAVE SAME ID AND getSouce() ?
In this case..it if was from rem or loc ?
} It would be really helpful if anyone could help me in this regard..
Thanks
Hari VigenshHi levi,
Thankx..
I solved the problem ..using same concept but in a different way..
One thing i wanted to make clear is that the two buttons are in the SAME CLASS and i am forming 2 different objects of the SAME class and then putting them in a GUI.THERE IS NO b and C. there is just two instances of b which belong to the SAME CLASS..
So the code
private JButton b = new JButton("ChgDir");
b.setActionCommand ("1");
wont work as both the instances would have the label "ChgDir" and have setActionCommand set to 1!!!!
Actually I have an array of buttons..So I solved the prob by writting a function caled setActionCmdRemote that would just set the action commands of one object of the class differently ..here is the code
public void setActionCommandsRemote()
for(int i = 0 ; i <cmdButtons.length ; i++)
cmdButtons.setActionCommand((cmdButtons[i].getText())+"Rem");
This just adds "rem" to the existing Actioncommand and i check it as folows in my actionperformed method
if(button.getActionCommand().equals("DeleteRem") )
deleteFileRemote();
else if(button.getActionCommand().equals("Delete") )
deleteFileLocal();Anyway thanx a milion for your help..this was my first posting and I was glad to get a prompt reply!!! -
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
JohnThank 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 -
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 -
View not copied or enhanced with wizard Error while creating Event Handler method in Z Component
Hello Friends,
In one Z Component (Custom Component), in one of the views, while creating event handler, it gave me error message that view not copied or enhanced with wizard.
I am aware that in Standard Component, if we want to create the event handler method then we need to first Enhance the Component and then we need to enhance the view.
But, in the Z Component (Custom Component), how to create event handler method in one of the views as while creating event handler method i am getting view not copied or enhanced with wizard error.Hi,
Add a method in views impl class with naming convention eh_on__* with htmt and html_ex parameters. I dont have have the system right now. Please check any existing event import export parameters.
Check out do handle event method in the same class.
Redefine that method. Call that event method in this handle method. See existing code for reference.
Attach that event to the button on click event in .htm page.
Regards,
Bhushan -
Event handling in alv oops With buttons
Hi Experts
I have some doubt in ALV OOPS using Events. Could any one please tell me the procedure to how to handle events in oops ( Like interactive reports using events ).
Thank you
Satyendra.Hello Satyendra
The following sample report shows you how to handle the event HOTSPOT_CLICK and BUTTON_CLICK.
DATA: gd_okcode TYPE ui_func,
gt_fcat TYPE lvc_t_fcat,
go_docking TYPE REF TO cl_gui_docking_container,
go_grid1 TYPE REF TO cl_gui_alv_grid.
DATA: gt_knb1 TYPE STANDARD TABLE OF knb1.
PARAMETERS: p_bukrs TYPE bukrs DEFAULT '2000' OBLIGATORY.
CLASS lcl_eventhandler DEFINITION.
PUBLIC SECTION.
CLASS-METHODS:
handle_hotspot_click FOR EVENT hotspot_click OF cl_gui_alv_grid
IMPORTING
e_row_id
e_column_id
es_row_no
sender, " grid instance that raised the event
handle_button_click FOR EVENT button_click OF cl_gui_alv_grid
IMPORTING
es_col_id
es_row_no
sender.
ENDCLASS. "lcl_eventhandler DEFINITION
CLASS lcl_eventhandler IMPLEMENTATION.
METHOD handle_hotspot_click.
* define local data
DATA:
ls_knb1 TYPE knb1,
ls_col_id TYPE lvc_s_col.
READ TABLE gt_knb1 INTO ls_knb1 INDEX e_row_id-index.
CHECK ( ls_knb1-kunnr IS NOT INITIAL ).
CASE e_column_id-fieldname.
WHEN 'KUNNR'.
SET PARAMETER ID 'KUN' FIELD ls_knb1-kunnr.
SET PARAMETER ID 'BUK' FIELD ls_knb1-bukrs.
CALL TRANSACTION 'XD03' AND SKIP FIRST SCREEN.
WHEN 'ERNAM'.*
SET PARAMETER ID 'USR' FIELD ls_knb1-ernam.
CALL TRANSACTION 'SU01' AND SKIP FIRST SCREEN.
WHEN OTHERS.
ENDCASE.
* Set active cell to field BUKRS otherwise the focus is still on
* field KUNNR which will always raise event HOTSPOT_CLICK
ls_col_id-fieldname = 'BUKRS'.
CALL METHOD go_grid1->set_current_cell_via_id
EXPORTING
is_row_id = e_row_id
is_column_id = ls_col_id.
ENDMETHOD. "handle_hotspot_click
METHOD handle_button_click.
* define local data
DATA:
ls_knb1 TYPE knb1.
READ TABLE gt_knb1 INTO ls_knb1 INDEX es_row_no-row_id.
CHECK ( ls_knb1-kunnr IS NOT INITIAL ).
SET PARAMETER ID 'KUN' FIELD ls_knb1-kunnr.
SET PARAMETER ID 'BUK' FIELD ls_knb1-bukrs.
CALL TRANSACTION 'XD03' AND SKIP FIRST SCREEN.
ENDMETHOD. "handle_button_click
ENDCLASS. "lcl_eventhandler IMPLEMENTATION
START-OF-SELECTION.
SELECT * FROM knb1 INTO TABLE gt_knb1
WHERE bukrs = p_bukrs
* 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 ALV grid
CREATE OBJECT go_grid1
EXPORTING
i_parent = go_docking
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.
* Set event handler
SET HANDLER:
lcl_eventhandler=>handle_hotspot_click FOR go_grid1,
lcl_eventhandler=>handle_button_click FOR go_grid1.
* Build fieldcatalog and set hotspot for field KUNNR
PERFORM build_fieldcatalog_knb1.
* Display data
CALL METHOD go_grid1->set_table_for_first_display
CHANGING
it_outtab = gt_knb1
it_fieldcatalog = gt_fcat
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.
* ok-code field = GD_OKCODE
CALL SCREEN '0100'.
END-OF-SELECTION.
MODULE status_0100 OUTPUT.
SET PF-STATUS 'STATUS_0100'.
* SET TITLEBAR 'xxx'.
ENDMODULE. " STATUS_0100 OUTPUT
MODULE user_command_0100 INPUT.
CASE gd_okcode.
WHEN 'BACK' OR
'END' OR
'CANC'.
SET SCREEN 0. LEAVE SCREEN.
WHEN OTHERS.
ENDCASE.
CLEAR: gd_okcode.
ENDMODULE. " USER_COMMAND_0100 INPUT
FORM build_fieldcatalog_knb1 .
* define local data
DATA:
ls_fcat TYPE lvc_s_fcat.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
EXPORTING
* I_BUFFER_ACTIVE =
i_structure_name = 'KNB1'
* I_CLIENT_NEVER_DISPLAY = 'X'
* I_BYPASSING_BUFFER =
* I_INTERNAL_TABNAME =
CHANGING
ct_fieldcat = gt_fcat
EXCEPTIONS
inconsistent_interface = 1
program_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.
LOOP AT gt_fcat INTO ls_fcat
WHERE ( fieldname = 'KUNNR' OR
fieldname = 'ERNAM' OR
fieldname = 'BUKRS' ).
IF ( ls_fcat-fieldname = 'BUKRS' ).
ls_fcat-style = cl_gui_alv_grid=>mc_style_button. " column appears as button
ELSE.
ls_fcat-hotspot = abap_true.
ENDIF.
MODIFY gt_fcat FROM ls_fcat.
ENDLOOP.
ENDFORM. " BUILD_FIELDCATALOG_KNB1
Regards
Uwe -
Event Handling in labview with arrays as event data
Hey folks,
I have a Labview Application which uses a dll to read Ethernet data. The setup is such that, when the dll has fresh data it sends out an event to the Labview Application so that the fresh data can be displayed.
However i have only managed to get this event based mechanism to send out a single structure at a time. Hence if there are 10 fresh data values, i need to send out 10 events (each event structure contains the parameter name, parameter value, unit and time stamp). It would be more efficient to send out an array of structures in a sigle shot.
I have tried this but Labview keeps crashing saying that an error was encountered and Labview needs to close along with an access violation message. I did a lot of online searching and found some LV code for event handling but not come accross any implementation which uses arrays as evend data. Is this supoorted? And if so is there any example vi that can be shared so that i get some knowledge about this.
Many Thanks in adavance,
Abel.I also gave a try by using a variant as the event data type instead of the cluster which contains the array of floats. I converted the cluster into a variant and used that to create the user event reference. Followed the same logic while decoding the dats.
But still the crash.... Here is the windbg output...
ModLoad: 07580000 075b7000 C:\Program Files\National Instruments\LabVIEW 2012\resource\lvalarms.dll
ModLoad: 0ca90000 0cb72000 C:\Program Files\National Instruments\LabVIEW 2012\resource\mesa.dll
ModLoad: 0c7f0000 0c7f9000 C:\Program Files\National Instruments\LabVIEW 2012\resource\lvuste.dll
ModLoad: 35000000 3509b000 C:\Program Files\National Instruments\Shared\TDMS\tdms.dll
ModLoad: 0c860000 0c87c000 D:\SapphireViewer\dll\SapphireClientDll.dll
ModLoad: 0e240000 0e2c7000 C:\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86\MSVCP80.dll
ModLoad: 0e2d0000 0e36b000 C:\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86\MSVCR80.dll
(1cb0.1a34): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0e47f8b4 ebx=051f0040 ecx=051f0040 edx=061e5764 esi=22820840 edi=07b10040
eip=03c2050c esp=0e47f5cc ebp=0e47f810 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Program Files\National Instruments\LabVIEW 2012\resource\tdcore_12_0.dll -
tdcore_12_0!LvVariant:etContents+0xac:
03c2050c 837e3100 cmp dword ptr [esi+31h],0 ds:0023:22820871=????????
I cannot really tell whats going on. Looking for some pointers.
Regards,
Abel. -
Validation Event Handler Not working with Flat File GTC Trusted Recon
We are created Event Handler for checking special characters in Telephone field.Its working fine when the user is created through Admin Console.but the event handler is not triggering while doing GTC Flat File Trusted recon.
Version: OIM 11.1.1.5.0
Can someone please help me out with this.
Thanks
Edited by: 790561 on 17-Feb-2013 09:01
Edited by: 790561 on Feb 17, 2013 9:35 PM
Edited by: 790561 on Feb 18, 2013 12:38 AMValidation Event handlers will not work with your trusted recon. You can use the GTC Validation provider, it is nothing but the plugins which you can insert with in your source field in GTC. I think you can easily get the steps for how to create a custom GTC Providers.
Edited by: iam37 on Feb 16, 2013 4:09 PM
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