[Qt-interest] show the needle of the compass

[Stefanos Antaris]

Matthias Pospiech wrote:
> Stefanos Antaris schrieb:
>> Matthias Pospiech wrote:
>>> Stefanos Antaris schrieb:
>>>> I tried to install the qwt libraries on my Mac and i didn't manage 
>>>> it.So i took the code of qwt and i put it into my qt application in 
>>>> order to use it.Ok.I found this function too.But i don't know which 
>>>> parameteres should i pass.Which painter,palette,etc.This is my 
>>>> problem.
>>> It took a look into the code of the dials example and there all 
>>> needles are created using setNeedle
>>>
>>> compass->setNeedle(new QwtDialSimpleNeedle(QwtDialSimpleNeedle::Ray,
>>>                false, Qt::white));
>>>
>>> Looking into the docs of QwtDialSimpleNeedle 
>>> (http://qwt.sourceforge.net/class_qwt_dial_simple_needle.html) I 
>>> find a member function setWidth.
>>> That is probably what you need.
>>>
>>> Not tested though,
>>> Matthias
>>>
>> Ok i made it.But the whole compass is just too small.And as i see on 
>> the qwt_compass.h code there is nowhere to change the size of the 
>> compass.Moreover the needle of the compass moves only when the mouse 
>> is clicked.And i can't make it to rotate with a variable.I mean 
>> something like rotate(59);Is there any function or i have to make one?
> You should look more into how the code works.
> The size is depending on how you integrated it into your layout. That 
> has nothing to do with qwt. And the value of the compass is very 
> likely set by setValue, the Orientation by setOrigin.
>
> Matthias
>
Thanks.I am just really in hurry and i can't work the best i could 
work.Thanks.And sorry for all the fool questions.