Elie Dumas schrieb:
> Hi list,
>
> To get the size in pixels of an object whose size was set in %, i found
> the _computeBoxHeight() private method. (ok, it's a private method of
> QxWidget, perhaps i souldn't use it?...)
You definitely shouldn't use it. To get pixel values it's the best to
use offsetWidth and offsetHeight currently. But these only work after
layouting.
>
> var c = new QxBoxLayout();
> c.setHeight("50%");
> d.add(c);
> this.warn("c.getHeight: "+c.getHeight());// --- string "50%", no
> pixel number ---
> this.warn("c._computeBoxHeight: "+c._computeBoxHeight());// --- ok,
> pixel number ---
>
> But if the object from which i need the size in pixel is inside another
> one (not registered directly in the document), then _computeBoxHeight
> cannot get the size in percent: it still doesn't know its parent:
> var c = new QxBoxLayout();
> c.setHeight(300);
>
> var c2 = new QxBoxLayout();
> c2.setHeight("30%");
> c.add(c2);
>
> this.warn("c2.getHeight: "+c2.getHeight());//string "30%", no pixel
> number
> this.warn("c2._computeBoxHeight: "+c2._computeBoxHeight());// ---
> TypeError: this.getParent() has no properties ---
>
> d.add(c);
>
> c2._computeBoxHeight() would work if c2's parent (c) was already added
> to the document.
>
> --> My question is: is there a way to get the size, in pixel, of c2,
> i.e. of an object whose size was set in % and which is not yet added to
> the document? Is there a better way than the private method
> _computeBoxHeight()?
How should the widget know where you will place it. You must add it to
the document. Otherwise this wouldn't work.
Hope this helps.
Sebastian
> Thanks for your help.
>
> Elie
>
>
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