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Re: Difference in reported size width

by Fabian Jakobs :: Rate this Message:

Hi Jim,

the size hint computes the preferred size of the widgets. This is
computed for each widget in the first pass of the layout process. The
second pass starts from the root widget and renders the widget based on
their size hints and the available size. That's why the size hint can
differ from the computed size. On way to get the computed size is
listening to the "resize" event. This event is fired after the final
size has been computed by the layout system.

I hope this helps,
Fabian

Jim Hunter schrieb:

> I am wondering how to accurately get the width of an object prior to
> it getting rendered?
>
> I have an object that I am 'building' that is a composite of a few
> controls (TextArea, Button, Label) and a few containers. Part of the
> object is a qx.ui.basic.Label that I need to know how wide it is to
> calculate some things. When I use this line, prior to rendering I get
> 69 as the width:
>
> this.theCaption.getSizeHint()['width']
>
> But if I issue that same call after it gets rendered, the width is
> reported as 62. So all of my calculations are off by 7. I am not
> changing the font of the label after creating it so that can't be the
> issue. Is there a better way to get the width of the label?
>
> Thanks,
> Jim

--
Fabian Jakobs
JavaScript Framework Developer

1&1 Internet AG - Web Technologies
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« Return to Thread: Difference in reported size width