Re: Anchor does not work in IE - very strange problem!
Hello, the advice to use an UncaughtExceptionHandler was very helpful for solving this acutal problem. But it also has a disadvantage: It brings to light new problems! :-) But because it would be offtopic here I have started another thread: CellTable - TextColumn.getValue (null) - another strange problemhttps://groups.google.com/forum/#!topic/google-web-toolkit/0QrMpt6Ttrg Magnus -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
but why was this exception not reported as others client-side exceptions are? In IE + DevMode you would have seen a NullPointerException on the console. If you use Chrome/Firefox + DevMode you never see the problem because both browser support the Audio element and thus its never null. In DevMode, GWT automatically registers a DefaultUncaughtExceptionHandler that logs uncaught exceptions to the console. This only happens in DevMode and not if you have compiled your app. Thus if you dont have set your own UncaughtExceptionHandler in your app's onModuleLoad() you will never see uncaught exceptions once your app is compiled. So always set an UncaughtExceptionHandler on your own and do what you want to do with that exception. For example I display an information message that something unexpected has happened and then send the exception to the server where it gets logged and a new issue is automatically created in an issue tracker. -- J. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
The exception occurrs somewhere in a constructor where a panel is created. At the moment it would be of help, if I could see how the source is translated into JS. But IE shows only the code from the host page. No idea how to update it. Compile your app in PRETTY or DETAILED mode so that your Java method/class/package names won't be obfuscated in the final JS and then the exception text should already give you a strong hint where things go wrong. In IE Developer Tools you need to hit the small refresh button. -- J. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
Hi, setting the compiler mode to pretty did not result in a more comprehensive error message: com.google.gwt.core.client.JavaScriptException: (TypeError) description: 'null.nullField' ist Null oder kein Objekt But I finally found the nullpointer exception by tracing. It happened in the newly added code for audio: private Audio snd_Move = Audio.createIfSupported (); ... snd_Move.setSrc(...); // snd_Move is null!!! So the original problem is solved now. Many thanks for all the advices! Last questions: - Why isn't this exception alerted with a comprehensive message, without calling setUncaughtExceptionHandler, like other client-side exceptions? - The fact, that Audio.createIfSupported () returns null: Does this mean that IE 8/9 does not support audio at all? Magnus -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
Audio element is supported from IE 8 according to thishttp://caniuse.com/#search=audio . Always use the static method isSupported() for all @PartialSupporthttp://www.gwtproject.org/javadoc/latest/com/google/gwt/dom/client/class-use/PartialSupport.htmlclasses for runtime check. On Monday, June 24, 2013 7:21:07 PM UTC+2, Magnus wrote: Hi, setting the compiler mode to pretty did not result in a more comprehensive error message: com.google.gwt.core.client.JavaScriptException: (TypeError) description: 'null.nullField' ist Null oder kein Objekt But I finally found the nullpointer exception by tracing. It happened in the newly added code for audio: private Audio snd_Move = Audio.createIfSupported (); ... snd_Move.setSrc(...); // snd_Move is null!!! So the original problem is solved now. Many thanks for all the advices! Last questions: - Why isn't this exception alerted with a comprehensive message, without calling setUncaughtExceptionHandler, like other client-side exceptions? - The fact, that Audio.createIfSupported () returns null: Does this mean that IE 8/9 does not support audio at all? Magnus -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
Ok, but why was this exception not reported as others client-side exceptions are? For example, if you add a widget to a DockLayoutPanel after the center widget, you get a comprehensive error message. In this case with the audio, I never have seen any comprehensive message, even after setting code style to pretty. (Remember, I only found the reason by tracing, not by a message). Magnus -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
Hi Jens! 1.) use SafeHtmlUtils instead of OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml. Ok! 2.) always use !DOCTYPE html in your host html page so that IE is in standards mode to avoid head aches :) This is already the case. In addition, I jhave already tried different X-UA-Compatible meta settings. The links that do not work, are these always the same links or is it totally random? Does it only happen in production mode or also in DevMode? If it only happens in production mode then my guess is that a native JavaScriptException is thrown in IE (e.g a null access) for any reason. Make sure you have activated IE's status bar and check if there is a JS warning/error icon and make sure you have GWT.setUncaughtExceptionHandler() set at your app startup. This was an important advice! After setting the UncaughtExceptionHandler, I get this message: com.google.gwt.core.client.JavaScriptException: (TypeError) description: Für die Eigenschaft Ze kann kein Wert abgerufen werden: Das Objekt ist Null oder undefiniert. number: -2146823281: Für die Eigenschaft Ze kann kein Wert abgerufen werden: Das Objekt ist Null oder undefiniert. So it's not a problem wirh the anchor, but with the client code it triggers. Maybe you should add some logging to your onBrowserEvent() methods so you can see whats going on in IE in production mode: https://developers.google.com/web-toolkit/doc/latest/DevGuideLogging The exception occurrs somewhere in a constructor where a panel is created. At the moment it would be of help, if I could see how the source is translated into JS. But IE shows only the code from the host page. No idea how to update it. Magnus -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Anchor does not work in IE - very strange problem!
Hello,
I have a very strange problem with some anchors, which occurrs only in IE
and only in certain combinations of version and browser/document modes.
The problem is, that *some* anchors will not work, allthough *all* anchors
are built by the same method!
There is a list of chess games and at the end of each row there are some
actions, like Open or Analyze. The actions are realized as anchors. All
the anchors for a row/game are put into a single panel, which is inserted
into the list.
When the problem occurrs, the first anchor Open will not work (meaning
that nothing happens), while the second anchor Analyze works just fine.
I believe that there must be a side effect somewhere, but I could not find
it. Perhaps there is a problem with
OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml. I cannot remember why
I decided to use it...
Any ideas how to find the bug or how to do it in another way?
Thanks
Magnus
-
private Panel getActions (Game game)
{
HorizontalPanel p = new HorizontalPanel ();
addAction (p,CMD_OPEN,game.idx,Open);
addAction (p,CMD_ANALYZE,game.idx,Analyze);
}
protected void addAction (Panel pnl,int cmd,int idx,String lbl)
{
Anchor a = createAnchor (cmd,idx,lbl,this);
if (hasWidgets (pnl))
pnl.add(new HTML (nbsp;));
pnl.add(a);
}
private Anchor createAnchor (int cmd,int idx,String lbl,ClickHandler hdl)
{
SafeHtml h = new OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml(lbl);
Anchor a = new Anchor (h);
a.addClickHandler(hdl);
Element e = a.getElement();
e.setAttribute(cmd,Integer.toString(cmd));
e.setAttribute(idx,Integer.toString(idx));
return (a);
}
public void onClick(ClickEvent evt)
{
Object o = evt.getSource();
if (o == null)
return;
if (!(o instanceof Anchor))
return;
Anchor a = (Anchor) o;
String t;
t = a.getElement().getAttribute(cmd);
int cmd = Integer.parseInt(t);
t = a.getElement().getAttribute(idx);
int idx = Integer.parseInt(t);
onCommand (cmd,idx);
}
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Re: Anchor does not work in IE - very strange problem!
Hi Magnus,
Just for the sake of thoroughness, are you sure that onCommand is even
being called? Or is it that the click event is not being registered at all?
On Friday, June 21, 2013 11:33:47 AM UTC+2, Magnus wrote:
Hello,
I have a very strange problem with some anchors, which occurrs only in IE
and only in certain combinations of version and browser/document modes.
The problem is, that *some* anchors will not work, allthough *all* anchors
are built by the same method!
There is a list of chess games and at the end of each row there are some
actions, like Open or Analyze. The actions are realized as anchors. All
the anchors for a row/game are put into a single panel, which is inserted
into the list.
When the problem occurrs, the first anchor Open will not work (meaning
that nothing happens), while the second anchor Analyze works just fine.
I believe that there must be a side effect somewhere, but I could not find
it. Perhaps there is a problem with
OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml. I cannot remember why
I decided to use it...
Any ideas how to find the bug or how to do it in another way?
Thanks
Magnus
-
private Panel getActions (Game game)
{
HorizontalPanel p = new HorizontalPanel ();
addAction (p,CMD_OPEN,game.idx,Open);
addAction (p,CMD_ANALYZE,game.idx,Analyze);
}
protected void addAction (Panel pnl,int cmd,int idx,String lbl)
{
Anchor a = createAnchor (cmd,idx,lbl,this);
if (hasWidgets (pnl))
pnl.add(new HTML (nbsp;));
pnl.add(a);
}
private Anchor createAnchor (int cmd,int idx,String lbl,ClickHandler hdl)
{
SafeHtml h = new OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml(lbl);
Anchor a = new Anchor (h);
a.addClickHandler(hdl);
Element e = a.getElement();
e.setAttribute(cmd,Integer.toString(cmd));
e.setAttribute(idx,Integer.toString(idx));
return (a);
}
public void onClick(ClickEvent evt)
{
Object o = evt.getSource();
if (o == null)
return;
if (!(o instanceof Anchor))
return;
Anchor a = (Anchor) o;
String t;
t = a.getElement().getAttribute(cmd);
int cmd = Integer.parseInt(t);
t = a.getElement().getAttribute(idx);
int idx = Integer.parseInt(t);
onCommand (cmd,idx);
}
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Re: Anchor does not work in IE - very strange problem!
Am Freitag, 21. Juni 2013 12:48:51 UTC+2 schrieb GWTter: Just for the sake of thoroughness, are you sure that onCommand is even being called? Or is it that the click event is not being registered at all? Yes! Because it works with other browsers. In addition, the second link (Analyze) also works, when the first one doesn't. Magnus -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
Hi, my problem is that I cannot analyze what happens. In chrome (where it works), I can examine the code and it looks like the code below. The two links are exactly the same, with a space between them realized as nbsp;. But maybe in IE the code looks different. The same for the JS code. IE always shows the code from the host page, so I cannot examine anything. I would be happy If I at least were able to see what is going on. Magnus - table cellspacing=0 cellpadding=0 style=padding-right: 10px; tbody tr td align=left style=vertical-align: top; a class=gwt-Anchor href=javascript:; cmd=1 idx=1481Öffnen/a /td td align=left style=vertical-align: top; div class=gwt-HTMLnbsp;/div /td td align=left style=vertical-align: top; a class=gwt-Anchor href=javascript:; cmd=3 idx=1481Analyse/a /td /tr /tbody /table -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
IE has had developer tools built in as far back as version 8, just press F12. If you're working with =IE7 then: IE dev toolshttp://www.microsoft.com/en-us/download/details.aspx?id=18359. Although it may work in other browsers or on the other anchor you want to see exactly what is or isn't occurring so you can narrow the scope of the issue, else it's a blind guessing game. I would put an alert or println in the onClick method to see first if the click is even registering for the first button, this will aid you in your analysis and you can then proceed from there. You haven't posted the onCommand method so we have no idea if the click is even registering in the first button case. On Friday, June 21, 2013 2:14:26 PM UTC+2, Magnus wrote: Hi, my problem is that I cannot analyze what happens. In chrome (where it works), I can examine the code and it looks like the code below. The two links are exactly the same, with a space between them realized as nbsp;. But maybe in IE the code looks different. The same for the JS code. IE always shows the code from the host page, so I cannot examine anything. I would be happy If I at least were able to see what is going on. Magnus - table cellspacing=0 cellpadding=0 style=padding-right: 10px; tbody tr td align=left style=vertical-align: top; a class=gwt-Anchor href=javascript:; cmd=1 idx=1481Öffnen/a /td td align=left style=vertical-align: top; div class=gwt-HTMLnbsp;/div /td td align=left style=vertical-align: top; a class=gwt-Anchor href=javascript:; cmd=3 idx=1481Analyse/a /td /tr /tbody /table -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
I've found that with the IE developer tools, you need to refresh the DOM view within the tools (there's a refresh icon in the HTML view section). The view doesn't seem to take the JS changes to the page into account initially. (And sometimes you never see CSS that GWT injects, but that's off-topic.) BTW, I ran your code and it worked fine in IE-7-10 as provided by the dev tools in IE10 (I just had onCommand do an alert with the two values), so maybe the issue is further down the line. On Friday, June 21, 2013 8:40:12 AM UTC-4, GWTter wrote: IE has had developer tools built in as far back as version 8, just press F12. If you're working with =IE7 then: IE dev toolshttp://www.microsoft.com/en-us/download/details.aspx?id=18359. Although it may work in other browsers or on the other anchor you want to see exactly what is or isn't occurring so you can narrow the scope of the issue, else it's a blind guessing game. I would put an alert or println in the onClick method to see first if the click is even registering for the first button, this will aid you in your analysis and you can then proceed from there. You haven't posted the onCommand method so we have no idea if the click is even registering in the first button case. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
Re: Anchor does not work in IE - very strange problem!
Hello,
I found another hint, that may be useful: Within the same application I do
the same thin in a toally other way: This time, the list is a CellTable and
the commands are rendered as a custom cell (see below). The anchors are
created in a totally different way. But the same problem exists here, too!
Isn't that strange?
I hope that these observations brings us closer to the solution.
(BTW: I wanted to try the HyperLink class, but when rendering into a cell
one has put everything into a SafeHtmlBuilder. Can I use a HyperLink widget
here?)
Magnus
public class ListCommandCell extends AbstractCellListCommandContext
{
public ListCommandCell ()
{
super (click);
}
@Override
public void render (Context context,ListCommandContext
value,SafeHtmlBuilder sb)
{
boolean first = true;
for (ListCommand c : value.cmd)
{
if (first)
first = false;
else
sb.appendHtmlConstant(nbsp;);
String e = ListCommand.enc(c);
String l = c.getLbl();
String t = renderCommand (e,l);
sb.appendHtmlConstant(t);
}
}
public String renderCommand (String cmd,String lbl)
{
String t = a href='javascript:;' style='cursor: hand;' cmd=' + cmd +
' + lbl + /a;
return (t);
}
@Override
public void onBrowserEvent (Context context, Element parent,/*Game*/
ListCommandContext value,NativeEvent event,
ValueUpdater/*Game*/ListCommandContext valueUpdater)
{
super.onBrowserEvent(context, parent, value, event, valueUpdater);
EventTarget tgt = event.getEventTarget();
Element e = Element.as(tgt);
String a = e.getAttribute(cmd);
ListCommand c = ListCommand.dec(a);
value.prc.onListCommand(c,value.idx);
}
}
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Re: Anchor does not work in IE - very strange problem!
General advice: 1.) use SafeHtmlUtils instead of OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml. 2.) always use !DOCTYPE html in your host html page so that IE is in standards mode to avoid head aches :) Also, if possible in your setup, let the webserver/appserver detect if IE is running in compatibility mode. If it is in compatibility mode, serve a nice help site that describes how compatibility mode can be turned off (= clicking this small broken paper icon in the address bar). Regarding your problem: The links that do not work, are these always the same links or is it totally random? Does it only happen in production mode or also in DevMode? If it only happens in production mode then my guess is that a native JavaScriptException is thrown in IE (e.g a null access) for any reason. Make sure you have activated IE's status bar and check if there is a JS warning/error icon and make sure you have GWT.setUncaughtExceptionHandler() set at your app startup. If there are no exceptions then maybe there is a hidden div above your link in certain situations, so that the click event can never reach the link. But in this case I would assume that you would have the problem in all browsers, not just IE. Maybe you should add some logging to your onBrowserEvent() methods so you can see whats going on in IE in production mode: https://developers.google.com/web-toolkit/doc/latest/DevGuideLogging -- J. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
