Reading the jQuery plugin articles, this code may well not work on all
browsers. There appear to be some quirks with IE (what a surprise)
and Opera (don't know of that is version specific). I also do not know
(I do not have a copy to test it with) whether the IE problems have
gone away with IE9.
David
On Friday 18 February 2011, Carlo Alberto Degli Atti wrote:
> Thx (I'm still learning GWT...)
>
> ;-)
>
> On Feb 18, 2:34 pm, David Goodenough <david.goodeno...@btconnect.com>
>
> wrote:
> > When you create the panel and want to render it, use:-
> >
> > DeferredCommand.addCommand( new Command( ) {
> > public void execute() {
> > textArea.rightSize( );
> > }
> > });
> >
> > where textArea is the ExpandableTextArea.
> >
> > David
> >
> > On Friday 18 February 2011, Carlo Alberto Degli Atti wrote:
> > > David it works (gwt2.2).
> > >
> > > But how can I set the height at rendering time (before any browser
> > > event)?
> > >
> > > On Feb 18, 1:53 pm, David Goodenough <david.goodeno...@btconnect.com>
> > >
> > > wrote:
> > > > I have not tried it on a RichTextArea, but the principle should work
> > > > on those too.
> > > >
> > > > David
> > > >
> > > > On Friday 18 February 2011, Carlo Alberto Degli Atti wrote:
> > > > > Hi David,
> > > > >
> > > > > thank you for your answer! I will try it and I will give you my
> > > > > feedback :-)
> > > > >
> > > > > In my case the width is not a problem; my concern is about the
> > > > > height (the number of displayed rows)...
> > > > >
> > > > > best regards,
> > > > >
> > > > > CA
> > > > >
> > > > > On Feb 18, 1:11 pm, David Goodenough
> > > > > <david.goodeno...@btconnect.com>
> > > > >
> > > > > wrote:
> > > > > > On Friday 18 February 2011, Carlo Alberto Degli Atti wrote:> Hi,
> > > > > >
> > > > > > > I've looked around but I haven't found any solution, so I post
> > > > > > > it here:
> > > > > > >
> > > > > > > how can I make a TextArea that expands its height depending on
> > > > > > > the text inside?
> > > > > > >
> > > > > > > Thanks
> > > > > > >
> > > > > > > CA
> > > > > >
> > > > > > Its good to find someone else who wants this. I first came
> > > > > > across fields like this with Lotus Notes, which has had these
> > > > > > for years. They are really useful, but very few other systems
> > > > > > seem to have them and to be honest it is one of the things that
> > > > > > puts me off browsers - but that is another story.
> > > > > >
> > > > > > I wrote some code which did this while ago, but I do not know if
> > > > > > it still works on a current GWT, and I am absolutely sure it can
> > > > > > be done better.
> > > > > >
> > > > > > import com.google.gwt.user.client.Element;
> > > > > > import com.google.gwt.user.client.Event;
> > > > > > import com.google.gwt.user.client.ui.TextArea;
> > > > > >
> > > > > > public class ExpandingTextArea extends TextArea {
> > > > > > public void onBrowserEvent( Event event) {
> > > > > > super.onBrowserEvent( event);
> > > > > > if (getOffsetHeight( ) <= getScrollHeight(
> > > > > > getElement( ))) setHeight( ( getScrollHeight(
> > > > > > getElement( )) + 6)+"px"); } private native int getScrollHeight(
> > > > > > Element e) /*-{ return e.scrollHeight;
> > > > > > }-*/;
> > > > > > public void rightSize( ) {
> > > > > > Element el = getElement( );
> > > > > > int h = getScrollHeight( el);
> > > > > > setHeight( ( h + 6) + "px");
> > > > > > }
> > > > > > };
> > > > > >
> > > > > > The fact that it has a magic number in it (6) is just plain
> > > > > > wrong, and I can not for the life of me remember why that number
> > > > > > is there.
> > > > > >
> > > > > > rightSize needs to be called when laying out a form, just to get
> > > > > > started. Again this can be done better. It is also possible that
> > > > > > somewhere along the line the need for getScrollHeight has gone,
> > > > > > but I have not been following the API closely enough to see.
> > > > > >
> > > > > > To get the full Notes function, one would also need to set the
> > > > > > width of the area. This only sets the height. But that is for
> > > > > > another day.
> > > > > >
> > > > > > Hope someone can turn this into something that works properly.
> > > > > >
> > > > > > David
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