[SOLVED] how can i generate such grid (for graphs) using Qt

[mcosta]

Hi,
you can write your Widget and reimplement paintEvent or try to use external libraries (Qwt for example)

[youzking]

yes i want to use the first method but the widget that i want paint on is inside another one (not defined in a class) so i can't redefine its paintEvent ,

can i paint on a widget without the paintEvent ?

ps : i installed qwt but i realized that drawing it manually is better,

[mcosta]

@youzking said:

yes i want to use the first method but the widget that i want paint on is inside another one (not defined in a class) so i can't redefine its paintEvent ,

What does it means?

[youzking]

@mcosta

i have a widget created inside another one , for example:

CWidget::CWidget(QWidget *parent) : QWidget(parent)
{
...
QWidget *anotherWidget= new Widget(this);
...
}
(this is just an example) ,
and i want to paint on anotherWidget ,

[mcosta]

Create a new class and use it for anotherWidget

[youzking]

@mcosta

this is what i want avoid ,!!
because the widget i want to paint on is created with QT Designer ,
i searched and found that promoting widget may help , but without results !!!

[youzking]

i want to create a widget , paint on it , and then show it , !
( using QLabel is just a workaround ),

[youzking]

Ok , i handled it by promoting the widget

[mcosta]

Promoting widgets is the way to do it (it works); so probably you have some issues using this feature.

If you want use a QLabel you can paint on a QPixmap and after set the label pixmap.

BTW I suggest to use custom widget

[youzking]

@mcosta

yes i also prefer using custom widget ,
thanks for your help ^^