There are a lot of reasons :)

I didn't know we could render a widget with QPainter, I never did like that in the past.
You are talking about :

painter->begin(mycustomwidget); right?

Looks like there is also itemChange if I forget about the idea of subclassing a QSlider ....

And for painting the customwidget, you just instantiate it into the paint method of the subclasses slider and parent it to the subclassed slider?

If I understand you, you want to "render" the CustomWidget without embedding it to the handle and filter the events on the rectangle zone and not on the customwidget?

Which one exactly ?
Basically you can subclass slider, obtain a rect of the handle style()->subControlRect and from here you can filter all mouse events from handle only. For paint of course you can reimplement paintEvent, but with style sheet is easily. What other events do you need ?

See how to customize the slider groove and slider handle[/quote]

:)

Cincirin, I know about this already :)
But this is just to customize the appearance of the handle, not transforming it to a custom widget on which you can add events, etc ...
Or am I mistaken?

See how to customize the slider groove and slider handle

Yes I need to move a widget from left to right within a certain range.
I had the idea of a slider because it looks convenient for what I want to achieve ;) (left to right implemented, start and end positions, etc ...)
I am sorry if I explained it in the wrong way.

[quote author="cincirin" date="1391516376"]If yes, you can use slider directly and either use style sheets or implement a custom style to draw/paint slider “widget” value.[/quote]

Here is my issue, I don't know how to paint the widget on the slider's handle. I don't think stylesheet can achieve that does it?
And for custom style, how to access the handle.

The normal way to go if the slider's handle was a class would be to subclass it and reimplement the paint method.
I am not familiar with QStyle at all, it's probably the reason why I don't know how to do this ....

I really appreciate your help.
I want to draw an audio sinus wave in a SinusWidget to be positonned on a time line widget.
This SinusWidget will be able to move horizontally from left to right depending on when you want the sinus wave to be played.
I should also have events connected to the SinusWidget to be able to change its width.

Because of this, I was thinking about a slider to provide embedded SinusWidget via the handle.

Something like this.

initial example :
ISINUS WIDGETI-----------------------------------------

position changed:
-----------------------------ISINUS WIDGETI------------

width changed:
----------------ISINUS ________ WIDGETI-----------------

What do you think about it?

Of course I can, but as Andre said is better to tell us what are you trying to achieve and what are your attempts to implement them ?

bq. Can you move these two QLabels?

Yes any widget can be moved, just set the widget position depending on your requirements.

So in short here is my implementation:

• • subclass QSlider and create two labels in constructor having parent this slider
• • in slider resizeEvent, move the two labels in respect with new slider width
• • for the two labels install event filter ON slider object ( or you can subclass labels to implement mouse press/move/release )
• • in slider event filter I check for mouse press/move/release for the two labels and move them accordingly

Looks like your example is perfect cincirin, could you please tell me with 2 lines of codes how you acheieved that?
Can you move these two QLabels?
I cant figure how to access the handle by the QSlider class ....

The two green areas are two QLabels

edit: Andre was faster :-)