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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