Draw a rectangle alternating two colors with qPainter

[SkripT]

Hi all, I want to draw a rectangle with qPainter alternating the colors black & white: The rectangle has to looks like if it was made with dashed lines. I think that the solution could be setting the correct brush for the pen used to draw the rectangle, but I have tried different combinations with no success. Anybody knows how to do it?. Thanks.

[wysota]

I think you could use gradients for that, but the result won't be perfect (it'll be a gradient and not striped box). Or you could draw many rectangles with different colours.

[SkripT]

Thanks, it's a solution but it's not what I'm looking for. Any other suggestion?

[jacek]

Did you try this?
_painter.setPen( Qt::DashLine );

[yop]

...you could draw many rectangles with different colours.
I don't think that you'll find a better solution ;) You know you only have to create once, one black and one white rectangle and then just draw them one after the other repeatidly.

[wysota]

Did you try this?
_painter.setPen( Qt::DashLine );

It will only change the outline, and he wants the filling striped. At least that's what I understand...

[SkripT]

It will only change the outline, and he wants the filling striped. At least that's what I understand...


Exactly jacek.




Quote:
Originally Posted by wysota
...you could draw many rectangles with different colours.
I don't think that you'll find a better solution You know you only have to create once, one black and one white rectangle and then just draw them one after the other repeatidly.

I think that the result doesn't looks like a stripped line...

[yop]

Then we must have misunderstood what you are looking for :confused:

[wysota]

Could you provide a picture of what you want to achieve?

[SkripT]

Very easy, what I want is simply a rubber band. The problem drawing it with setPen( Qt::DashLine ) is that you can only choose one colour, I want to choose the two colors: black & white.

[jacek]

The problem drawing it with setPen( Qt::DashLine ) is that you can only choose one colour, I want to choose the two colors: black & white.
You can draw white rectangle with a solid line and then a black one using dashed line.

[wysota]

Have you seen QRubberBand?

[SkripT]

You can draw white rectangle with a solid line and then a black one using dashed line.

One time more, thanks. I don't know what i was tinking of.... The solution is very easy :D