Yes. Use GWT properly. Don't use raw HTML. That's your problem. Instead of adding an HTML widget that wraps a "<div>", use a SimplePanel & set it's id if you need to. Look at the showcase - it shows you a brief overview of most (all?) the widgets GWT has.
Think of using raw HTML in your app as something akin to JSNI - only do it if you know what you are doing, otherwise you're just going to shoot yourself in the foot. The only time raw HTML is "commonly" used is in the constructor of some Widgets (you'll see a boolean asking if you want to treat the string as text or html). The rule of thumb to use is as follows: HTML element | v wrapping GWT root panel | v GWT widgets & panels | v HTML possible Do not put GWT widgets below HTML possible. Do not wrap HTML possible in GWT widgets. HTML element can have sibling elements that get wrapped with GWT. Hopefully this'll clarify it for you. On Tue, Apr 28, 2009 at 4:52 AM, kohlyn <[email protected]> wrote: > > > Any suggested workarounds? > > I currently load a page layout in HTML (Header/Menu Bar/Footer) ... > then in each section I load different HTML layouts depending on the > user, and then I add the controls. > > > On Apr 27, 6:15 pm, Vitali Lovich <[email protected]> wrote: > > Yes this has already come up on the mailing list. This was always > illegal, > > just uncaught prior to 1.6. You cannot wrap two elements in GWT if they > > already have a parent/child relationship in the DOM (causes a mismatch in > > the trees). > > > > Do a search & you'll find the response from the GWT developer regarding > this > > issue. > > > > > > > > On Mon, Apr 27, 2009 at 11:12 AM, kohlyn <[email protected]> wrote: > > > > > I'm getting the following errors with 1.6.4 on a Mac. > > > > > "A widget that has an existing parent widget may not be added to the > > > detach list" > > > > > The HTML is: > > > > > <body> > > > <!-- OPTIONAL: include this if you want history support --> > > > <iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' > > > style="position:absolute;width:0;height:0;border:0"></iframe> > > > <h1>Web Application Starter Project</h1> > > > <div id="testdiv"></div> > > > </body> > > > > > Code: > > > > > public void onModuleLoad() { > > > > > HTMLPanel p = new HTMLPanel("<div id=\"testdiv2\">Test > Div > > > 2</ > > > div>"); > > > > > RootPanel.get("testdiv").add(p); > > > > > final TextBox txtUsername = new TextBox(); > > > > > RootPanel.get("testdiv2").add(txtUsername); > > > > > } > > > } > > > > > This code worked in the 1.4 and 1.5 branches, but not 1.6. > > > > > The line: > > > > > "RootPanel.get("testdiv2").add(txtUsername);" > > > > > throws the exception. > > > "A widget that has an existing parent widget may not be added to > > > the detach list" > > > > > The problems appears to be with a new check in > > > RootPanel.detachOnWindowClose(Widget widget) > > > > > assert !isElementChildOfWidget(widget.getElement()) : "A widget > > > that has " > > > + "an existing parent widget may not be added to the detach > > > list"; > > > > > RootPanel.isElementChildOfWidget(Element element) appears to fail > > > because I'm adding a widget to an already attached element. > > > > > Any work arounds/ideas would be greatly appreciated ... I have a 1.4 > > > application that is based on dynamically loading page layouts from a > > > database. > > > > > Thanks. > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
