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 <[email protected]>
>
> 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 <[email protected]>
> > >
> > > 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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