Val(sgnl) Property of a Button to Fire Event
I'm trying to call a button value change event handler by using the Val(sgnl) property of a button control. Its not working. Ive done this with boolean controls and it works great. The boolean version takes a boolean input while the button version takes a variant - I'm not sure why there is a difference. I tried it by wiring a T/F directly into the property, and using a Data To Variant to convert the input, but neither works.
Thanks,
Bill F
Bill,
I think I have the answer for you. I knew I had done this before so I started to create the attached VI. Well I ran it and got an error, thus I think the answer.
The button can not have a mechanical action of "Latching". If you change the button to switching it should work fine. I have attached a working VI.
Evan
National Instruments
Attachments:
button_event.vi 32 KB
Similar Messages
-
Question about Val(Sgnl) property
Hello,
I am reading data from a telnet connection as 16-bit binary values. I strip individual bits of that 16-bit word to light up indicators. For each indicator that I light up, I want to have an associated 'history' indicator, that would show if it lit up, then went dark at some point (i.e. like an overnight test).
To achieve this, when I assign a value to a given indicator, I send that same value to that indicator's Val(Sngl) property. Then I have an event structure that simply sets the 'history indicator' true whenever there's a Value Change in that Val(Sngl) field.
OK so my problem is that I must not be understanding what constitutes a value change, because what's happening is that when there is an error on any indicator, ALL of the history indicators are lighting up. The VI is large and complex, so instead I attached a picture that shows the important parts. Notice on the left I mask out individual bits, then on the right is where I light up the indicator based on the Value Change property. I've only shown one here because they are discrete but the code is identical...if the respective error bit changes value (low-to-high or high-to-low), then light the history.
So as an example...if G_LOL Summ goes active, the history bits for all 5 indicators goes active.
I put probes on the signals that I don't expect to light up (i.e. probe #18 at the bottom of the picture on the left)...it stays "false" the whole time (i.e. value doesn't change), yet it's history indicator comes on.
Any thoughts? Thank you
Solved!
Go to Solution.
Attachments:
labview.png 63 KBbmishoe wrote:
that's an excellent idea because the event structure 'value change' options by default include New Value and Old Value...I can just check to see if they are = and if not then set the history bit true. Great idea!
Or, to avoid extra code, you could check to see if they are NOT true equal and use that output as the value for your history bit.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all. -
Useful Code of the Day: Button fires events while held
Have you ever been making a GUI application with Swing and used some JButtons? Fun, right? Have you ever wanted to have the button fire action events while the button was being held down? Well, if you just stick a plain JButton in your application and press and hold the mouse button on it, you'll see it doesn't do anything except sit there looking pressed in. Insolent button!
RepeatButton (code below, couldn't think of a better name) is a JButton subclass which contains a timer that is set when the mouse button presses the button, and after a slight initial delay (configurable), fires action events to all registered action listeners repeatedly (with another configurable delay between events) until either the mouse is released or the mouse moves out of the button (it starts up again if the mouse moves back over without releasing the mouse button) or the button is disabled. The event modifiers are passed on as well, so you know if the shift or control buttons (or whatever) are being pressed at the same time.
There is also a method to disable the repeated action firing while holding. This, in effect, turns the button into a normal JButton, if needed.
There is a main method for testing which will show a button in a frame and print out the action command for each action event fired.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.event.*;
* <code>RepeatButton</code> is a <code>JButton</code> which contains a timer
* for firing events while the button is held down. There is a default
* initial delay of 300ms before the first event is fired and a 60ms delay
* between subsequent events. When the user holds the button down and moves
* the mouse out from over the button, the timer stops, but if the user moves
* the mouse back over the button without having released the mouse button,
* the timer starts up again at the same delay rate. If the enabled state is
* changed while the timer is active, it will be stopped.
* NOTE: The normal button behavior is that the action event is fired after
* the button is released. It may be important to konw then that this is
* still the case. So in effect, listeners will get 1 more event then what
* the internal timer fires. It's not a "bug", per se, just something to be
* aware of. There seems to be no way to suppress the final event from
* firing anyway, except to process all ActionListeners internally. But
* realistically, it probably doesn't matter.
public class RepeatButton extends JButton
implements ActionListener, MouseListener {
* The pressed state for this button.
private boolean pressed = false;
* Flag to indicate that the button should fire events when held.
* If false, the button is effectively a plain old JButton, but
* there may be times when this feature might wish to be disabled.
private boolean repeatEnabled = true;
* The hold-down timer for this button.
private Timer timer = null;
* The pressed state for this button.
private int delay = 60;
* The pressed state for this button.
private int initialDelay = 300;
* Holder of the modifiers used when the mouse pressed the button.
* This is used for subsequently fired action events. This may change
* after mouse pressed if the user moves the mouse out, releases a key
* and then moves the mouse back in.
private int modifiers = 0;
* Creates a button with no set text or icon.
public RepeatButton() {
super();
init();
* Creates a button where properties are taken from the Action supplied.
* @param a the button action
public RepeatButton(Action a) {
super(a);
init();
* Creates a button with an icon.
* @param icon the button icon
public RepeatButton(Icon icon) {
super(icon);
init();
* Creates a button with text.
* @param text the button text
public RepeatButton(String text) {
super(text);
init();
* Creates a button with initial text and an icon.
* @param text the button text
* @param icon the button icon
public RepeatButton(String text, Icon icon) {
super(text, icon);
init();
* Initializes the button.
private void init() {
this.addMouseListener(this);
// initialize timers for button holding...
this.timer = new Timer(this.delay, this);
this.timer.setRepeats(true);
* Gets the delay for the timer of this button.
* @return the delay
public int getDelay() {
return this.delay;
* Set the delay for the timer of this button.
* @param d the delay
public void setDelay(int d) {
this.delay = d;
* Gets the initial delay for the timer of this button.
* @return the initial delay
public int getInitialDelay() {
return this.initialDelay;
* Sets the initial delay for the timer of this button.
* @param d the initial delay
public void setInitialDelay(int d) {
this.initialDelay = d;
* Checks if the button should fire events when held. If false, the
* button is effectively a plain old JButton, but there may be times
* when this feature might wish to be disabled.
* @return if true, the button should fire events when held
public boolean isRepeatEnabled() {
return this.repeatEnabled;
* Sets if the button should fire events when held. If false, the
* button is effectively a plain old JButton, but there may be times
* when this feature might wish to be disabled. If false, it will
* also stop the timer if it's running.
* @param en if true, the button should fire events when held
public void setRepeatEnabled(boolean en) {
if(!en) {
this.pressed = false;
if(timer.isRunning()) {
timer.stop();
this.repeatEnabled = en;
* Sets the enabled state of this button. Overridden to stop the timer
* if it's running.
* @param en if true, enables the button
public void setEnabled(boolean en) {
if(en != super.isEnabled()) {
this.pressed = false;
if(timer.isRunning()) {
timer.stop();
super.setEnabled(en);
* Handle action events.
* @param ae the action event
public void actionPerformed(ActionEvent ae) {
// process events only from this components
if(ae.getSource() == this.timer) {
ActionEvent event = new ActionEvent(
this, ActionEvent.ACTION_PERFORMED,
super.getActionCommand(), this.modifiers);
super.fireActionPerformed(event);
// testing code...
else if(testing && ae.getSource() == this) {
System.out.println(ae.getActionCommand());
* Handle mouse clicked events.
* @param me the mouse event
public void mouseClicked(MouseEvent me) {
// process events only from this components
if(me.getSource() == this) {
this.pressed = false;
if(this.timer.isRunning()) {
this.timer.stop();
* Handle mouse pressed events.
* @param me the mouse event
public void mousePressed(MouseEvent me) {
// process events only from this components
if(me.getSource() == this && this.isEnabled() && this.isRepeatEnabled()) {
this.pressed = true;
if(!this.timer.isRunning()) {
this.modifiers = me.getModifiers();
this.timer.setInitialDelay(this.initialDelay);
this.timer.start();
* Handle mouse released events.
* @param me the mouse event
public void mouseReleased(MouseEvent me) {
// process events only from this components
if(me.getSource() == this) {
this.pressed = false;
if(this.timer.isRunning()) {
this.timer.stop();
* Handle mouse entered events.
* @param me the mouse event
public void mouseEntered(MouseEvent me) {
// process events only from this components
if(me.getSource() == this && this.isEnabled() && this.isRepeatEnabled()) {
if(this.pressed && !this.timer.isRunning()) {
this.modifiers = me.getModifiers();
this.timer.setInitialDelay(this.delay);
this.timer.start();
* Handle mouse exited events.
* @param me the mouse event
public void mouseExited(MouseEvent me) {
// process events only from this components
if(me.getSource() == this) {
if(this.timer.isRunning()) {
this.timer.stop();
* Testing flag. Set in main method.
private static boolean testing = false;
* Main method, for testing. Creates a frame with both styles of menu.
* @param args the command-line arguments
public static void main(String[] args) {
testing = true;
JFrame f = new JFrame("RepeatButton Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel();
RepeatButton b = new RepeatButton("hold me");
b.setActionCommand("test");
b.addActionListener(b);
p.add(b);
f.getContentPane().add(p);
f.pack();
f.show();
"Useful Code of the Day" is supplied by the person who posted this message. This code is not guaranteed by any warranty whatsoever. The code is free to use and modify as you see fit. The code was tested and worked for the author. If anyone else has some useful code, feel free to post it under this heading.This makes word completion possible for JTextArea:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.util.*;
* This class provides word completion for JTextArea.
public class WordCompleteArea extends JTextArea {
private boolean isTextComplete = true;
public WordCompleteArea (Document doc, String text,
int rows, int columns, KeyStroke expandKey) {
super (doc, text, rows, columns);
String s = "word-complete";
Action wordComplete = new AbstractAction () {
public void actionPerformed (ActionEvent e) {
wordComplete ();
getInputMap ().put (expandKey, s);
getActionMap ().put (s, wordComplete);
public WordCompleteArea (Document doc, String text, int rows, int columns) {
this (doc, text, rows, columns,
KeyStroke.getKeyStroke ("ctrl pressed SPACE"));
public WordCompleteArea (Document doc) {
this (doc, null, 0, 0);
public WordCompleteArea (String text, int rows, int columns) {
this (new PlainDocument (), text, rows, columns);
public WordCompleteArea (int rows, int columns) {
this (null, rows, columns);
public WordCompleteArea (String text) {
this (text, 0, 0);
public WordCompleteArea () {
this (0, 0);
* Define if text already written in the JTextArea will be used
* for expansion.
public void setTextComplete (boolean b) {
isTextComplete = b;
* Find out if text already written in the JTextArea will be used
* for expansion.
public boolean isTextComplete () {
return isTextComplete;
private String tokenDelimiters = "\t\r\n ,;()[]{}%+/-*<>=&|!\"\'.@#";
* Get delimiters that form a word.
public String getTokenDelimiters () {
return tokenDelimiters;
* Set delimiters that form a word.
public void setTokenDelimiters (String s) {
tokenDelimiters = s;
// Additional words used for expansion.
private LinkedList wordCompleteList = new LinkedList ();
* Add words that will be used as expansion.
public void addCompleteWords (java.util.List words) {
wordCompleteList.add (words);
* Add a word that will be used as expansion.
public void addCompleteWord (String word) {
wordCompleteList.add (word);
private String lastExpanded = null;
private String lastExpansion = null;
private Set dontAccept = new HashSet ();
protected void wordComplete () {
int caret = getCaretPosition ();
if (caret == 0)
return;
String text = getText ();
if (caret != text.length () && isCompletionLetter (text.charAt (caret)))
return;
StringBuffer sb = new StringBuffer ();
int index = caret - 1;
char ch;
while (index >= 0 && isCompletionLetter ((ch = text.charAt (index)))) {
sb.append (ch);
index--;
if (sb.length () == 0)
return;
sb.reverse ();
String word = sb.toString ();
String toExpand = word;
if (toExpand.equals (lastExpansion)) {
dontAccept.add (lastExpansion);
toExpand = lastExpanded;
} else {
dontAccept.clear ();
String s = findExpansion (toExpand, caret);
if (s != null) {
lastExpanded = toExpand;
lastExpansion = s;
replaceRange (s, caret - word.length (), caret);
} else {
dontAccept.clear ();
lastExpanded = null;
lastExpansion = null;
int diff = word.length () - toExpand.length ();
replaceRange ("", caret - diff, caret);
private boolean isCompletionLetter (char ch) {
return tokenDelimiters.indexOf (ch) < 0;
protected String findExpansion (String word, int caret) {
StringTokenizer st;
if (isTextComplete) {
st = new StringTokenizer (getText (), getTokenDelimiters ());
while (st.hasMoreTokens ()) {
String s = st.nextToken ();
if ( s.startsWith (word)
&& s.length () != word.length ()
&& !dontAccept.contains (s) ) {
return s;
for (Iterator it = wordCompleteList.iterator (); it.hasNext (); ) {
st = new StringTokenizer
((String) it.next (), getTokenDelimiters ());
while (st.hasMoreTokens ()) {
String s = st.nextToken ();
if ( s.startsWith (word)
&& s.length () != word.length ()
&& !dontAccept.contains (s) ) {
return s;
return null;
// TEST
public static void main (String[] args) {
WordCompleteArea a = new WordCompleteArea ();
JFrame window = new JFrame ();
window.getContentPane ().add (a, BorderLayout.CENTER);
window.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
window.setSize (300, 300);
window.setVisible (true);
} -
How to assign a dynamic value to the value property of a button ?
Hi Folks,
I have a need, can i know how to assign a dynamic value to the value property of a button. Scenario is like follows...
This is a struts based web application
1. I have a file which consists of login user details (user name and his previlages) for a web application.
2. I got those user details, into a List.
3. When a user logged into the web app, in the home page there are few buttons. The type and number of buttons shown depends on the type of user/ user. (Buttons have different combination and the number of buttons available are not constant, they will vary from user to user).
4. for each button, there will be a different action. I can pass the value of a button to an action class, but here button must have a dynamic value.
Here is my test code:
<%
if (List != null)
for (int i = 0; i <List.length; i++)
%>
<html:submit property="rduname" value= "<%=List%>" onclick="return submitRdu('<%=List[i] %>');"/>
<%
%>
But my problem is how to assign a dynamic value to the value property of the button ( i know 'value= "<%=List[i]%>" ' will not work, just wanted show you guys).
Thanks in advance,
UV
Edited by: UV_Dev on Oct 9, 2008 2:15 PMLet me try i know am not good at JSP but do we need double quotes here
value= <%=List%>i think JSTL should help you about the dynamic thing -
Disabled button fires events to event structure
Hi all,
I was trying to disable a Button on the frontpanel by using its enabled property while the event was executed. The ide wa not to create more events of this buttopn while its fucntion was executed. However thsi did not work.It was creating events even though it was greyed out.
I troied two different versions:
1) in the event case of the button (value changed) in a sequence I first dispalbned the button, execuded the code and then enabled it again
Result: All events were generated even though the button was greyed out
2) in the event case of the button (value changed) in a sequence I disbaled the Button and then started a second event. The Second event executed the code and then enabled the Button egain
Result: Even though the Button was greyed out events were generated
3) in the event case of the button (value changed) in a sequence I first dispalbned the button, execuded the code and in the timeout event I thenenabled it again
Result: No additional events were generated
it seems that the enable state of the button is analysed at teh time when the event is execute din teh event case but not at the time when it was created?
So I Tried the Time Input of the case expecting that it woudl give me a time stamp of the time when the key was pressed - but instead it gave me the time point when teh event was executed...
Teh only othe rsolution was to set teh cursor to busy (however I dont want to see the changed cursor during the busy cycle)
So how can I make shure that no additional events are fired during the time teh code of the Button s executed?
Thanks for any help,
Rainerto altenbach:
The evet takes about one or two seconds - I checked the behaviour as shown in the attached examples with LV 8.5, LV 2010, TV2011, LV2012 - allways exactly the same behaviour.
It does not make any difference weather you use switch when pressed or latched when pressed.
It does not make any difference weathe ror not you tag "Lock front panel" for that event
to sth:
> If you disable a front panel control (ie the button) you cannot click on it and a value changed event will not be
generated.
This is my experience so far as well, but if you disable and enable the control within the same event it does not work (see attaced example 1) and 2). It only works if you do the enable in the timeout event.
> The time stamp from the event case left hand property is the time of the event not the time of execution.
> If you ask for the timer value inside the event case it will be the time of event case executing.
In the attached exampel this is not the case. The time differecne between the Time input on the left and the Tick count
placed in the event is 0 for all events generated whil the button is supposed to be disabled.
As I wrote before, the explanation I have for this behaviour is that the events are generated by windows weather or not
the button is disabled and they are queued to the event cue. Only when the event is handeled LabVIEW tests weather
or not the button is disabled and ignores the event in case it is disabled. If the Disabling and enabling is done
withim the same event the button pressed events are added to thw event queue and the button is set to enabled before the next event (button pressed while it shoul be disabled) is handeled. When that event is handeled the button is enabled again (by the original event) and therefore the evenet is not ignored (because by the time of execution of the event the button is enabled again).
If the button is enabled in the timeout event instead of the button change value event all event in teh queue are executed before teh timeout event. At their time of execution therefore the button is steill disabled. Only then the timeout event enables the button again.
If the vi is set to busy (sand clock) this is activating actually a windows function/property and no events are queued to teh event queue by windwos. Therefore no button change event is added to teh queue.
Funtciomn of the 3 attached Vis (LV 2010):
Run the Vi, then press the Test button once - when it is greyed out click it a few more times. The test button value
changed event has a 2 second delay. You will see the event counter increase, and you will see the time difference
between the time property on the left of the event and the tick count vi whci is displayed in the waveform chart.
DisableButton 1: Disable and enable are ste in teh same event
DisableButton 2: The button is disabled then a second event is called to do the work and then enable teh button again
DisableButton 3: The Button is disabled in button change value event and it is enabled again in teh timeout event.
Attachments:
DisableButton1-3.zip 29 KB -
EL in the "action" property of the button
I am using ADFBC with JDeveloper 10.1.3.3
I have a scenario where by pressing on a button on a page, I want to be able to return to the originating page, and there are multiple originating pages.
I can achieve this by putting the logic in the "action method" of the backing bean. It just seems to me to be lots of overheads with creating backing beans just for this purpose. I am wondering if there are easier ways. What I would like to be able to do is to put the logic as an EL in the "action" property of the button itself, but apparently, this is not allowed. Please advise.User,
The backing bean is absolutely the correct place for this type of logic. Backing beans are part of the "controller" piece of the MVC (model-view-controller) architecture. The controller is responsible for flow-of-control; hence the backing bean is a proper place for it.
What you are trying to do is to essentially put the controller logic into the view layer - much like the way people used to create JSP's with code interspersed with markup.
I would strongly recommend you do this type of logic/code in the backing bean.
Regards,
john -
Raise a button's click event handler from another event handler
hi,
I am trying to raise a button's click event from another button's click event.
Automation gives a runtime error. I checked out some other forums for answers but they dont work when called from another event handler.
Console.WriteLine(gestureData.name);
if (s==b2) ;
//raise button2's click event
private void b2_Click(object sender, RoutedEventArgs e)
MessageBox.Show("I am button2");
private void b3_Click(object sender, RoutedEventArgs e)
MessageBox.Show("I am button3");
Any help will be appreciated.
Thanks,
Shaleen
TheHexLordHi Andy,
I tried to implement your suggestion.
What I am trying to do is, say there is a label whose content property needs to be updated every time a button b1 is clicked. When the button is clicked , it check if a condition is met and depending upon that condition it updates the content of the label
. Say , if the text entered is "add" and the button is clicked and the label's content is set to "add", if the text entered is "sub" and then the button is clicked, the label's content is set to "sub".
I understand that there is no need to fire up different methods for this as this can be done by checking for conditions in the same button click event but it seems that updating the UI is not happening. I get an error saying.:
A first chance exception of type 'System.InvalidOperationException' occurred in WindowsBase.dll
The program '[6660] WpfApplication8.vshost.exe: Program Trace' has exited with code 0 (0x0).
The program '[6660] WpfApplication8.vshost.exe: Managed (v4.0.30319)' has exited with code -1073741819 (0xc0000005) 'Access violation'.
this goes away when I remove the Label.Content="add" or Label.Content= "sub";
I think the label's content property does not update dynamically.
Thanks
TheHexLord -
How to fire event on panel in coverflow?
Hi,
I have cover flow.Inside that 10 panels(created dynamically) will be present.
when u run application we will get coverflow.My requirement is when i click on first panel i have to
fire event.similarly when i click on remaining panels(ie first click it will show to user(panel1) and second click on the same pane1(panel1) event
will be fired.for suppose second click on panel2(not panel1),then i dont want fire event).How to do that?
Regards
D.Mahesh BabuHi Sarah,
Looks like you are talking of exactly what I want!
I have attached a sample VI to try achieve what I want. But it still has some issues which are:
1) I am unable to configure a Plot Attribute Change Event. I have used a mouse leave event instead. How does one configure a Plot Attribute Change Event?
2) Is there no single property which will transfer all the settings of plot legend from one graph to plot legend of another graph? In my sample VI, I have to read each property of the master graph and feed it into the slave graph.
Kindly note I am using LV FDS 7.1 on Win2000
Thanks,
Gurdas
Message Edited by Gurdas on 03-27-2006 11:51 PM
Gurdas Singh
PhD. Candidate | Civil Engineering | NCSU.edu
Attachments:
Graph_PlotLegend_Event.vi 45 KB -
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. -
Want to fire event receiver before workflow is execute while adding File in Document Library.
Hi,
I have Event receiver and workflow attached to same Document
Library.
Is it possible to fire event receiver before Workflow is
executed ?
Regards,
MilindHi,
According to your description, my understanding is that you want fire event receiver before workflow is excuted.
If the workflow for a list is set to auto-start, it will always execute before event receiver by default.
Here is a similar thread for your reference:
http://sharepoint.stackexchange.com/questions/3147/execution-order-of-event-receivers-and-workflow-on-a-list
As a workaround, you can set the workflow start by manually. Then , after executing the event receiver, you can start workflow using code at the end of event receiver.
Here is a demo for your reference:
http://zimmergren.net/technical/starting-a-sharepoint-workflow-from-code-event-receiver
More information about start workflow using C#:
http://jainnitin2411.wordpress.com/2012/07/06/programmaticallystartsharepointworkflow/
Best regards,
Zhengyu Guo
Zhengyu Guo
TechNet Community Support -
Hi,
I want to fire events in code e.g. sorting of table columns. I'm sure I cannt call event handler with null parameter here.
Can anybody please help here?
Thanks in advance.
Rgds,
Atul.Hi Kishan,
I think I'm confusing you. i do not have any controller usage.
below is my event handler method:
public void onActionSortTableColumn(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
TableAccessories Accessories = wdContext.currentcontextElement().getTableSorter();
Accessories.onTableEvent(wdEvent);
I just want to anyhow call this method, without wdEvent being null.
Is there any way I can fire the event and this method get called OR to create wdEvent to call this method directly?
Rgds,
Atul. -
How to fire event to generate insert message for the child objects?
We are in process to integrate CRM On Demand and existing Microsoft SQL DB.
We have the following problem:
For ex., we have CRM Object_1 that already synchronized with the SQL DB. CRM also has independent Object_2 and its child Object_2.1
We dicided that we want to connect the Object_2 as child to the Object_1.
The question is how to fire event to generate insert message for the Object_2 and Object_2.1?
What is the best technique? Is it possible to do it by workflow configuration or it needs to be done programmatically?
Thanks,
Dmitry
Edited by: 955827 on Aug 29, 2012 11:57 AMHi,
integration events can be generated only via worklow. You will need to create separate workflows for each record type (regardless if it is child or parent) because a workflow for the parent record type will not trigger when a child record is created/ associated. Also, the association workflows will trigger only when the specific event occurs.
There is not way to generate the integrtaion events programatically. They are generated by workflows and are read/ interpreted by a code extension. -
I need to edit a re-occurring event in calender on my iPhone and there is no edit button for that event. How do I edit or delete it?
I am not sure how this works but it seems that it may be all or nothing.
To turn off Facebook events on your device:
Settings > Facebook > Calendars > Off
If you do not want to disable everything, maybe this thread will help:
https://discussions.apple.com/thread/4349443 -
InputField fire event problem in webDynpro
I have one validation or Fire Event problem with respect to Inputfield in web Dynpro.
I have one Input filed and created the context varible for that, then i mapped the context varible to the InputField, and i changed the context varible type as date.So , when i run the view , it will show the calender near to the text box to select the perticular date. On select of the perticular date. It will populate selected date in to the inputField.
On selection of the perticular date. Based on the date i want to generate the next 12 months date at runtime in different text boxes. But the only event available for the InputField is only "onEnter". This is not useful in my case, bcz on selection of the Date , the user may not use the Enter key. so , how can use the other events like onSelection or onChange events in the InputFields to reach my needs.
Any one give me the idea to solve this problem.
VijayHello Vishal,
You may also refer the sample code in the below link
<a href="http://sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/0c0dcacd-0401-0010-b4bd-a05a0b4d68c8">http://sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/0c0dcacd-0401-0010-b4bd-a05a0b4d68c8</a>
Regards,
Sudeep. -
Initialize the radio button in initalization event
How to initialize the radio button in initalization event.
Here the problem is i want to initialize the radiobutton which is in a Logical data base(PNP).
Regards
Vamsihi,
try like this,
parameters: rr1 type radio button group g1 default 'X',
rr2 type radio button group g1,
rr3 type radio button group g1.
or in the event initialization.
CREATE 3 radio buttons and initialize in this event
INITIALIZATION.
RR1 = 'x'.
if helpful reward some points.
with regards,
Suresh Aluri.
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