How to make bottom right & bottom left corner round of the QWidget

**merry** · 15th November 2007, 06:20

Hi all

I want to make my widgets bottom right and bottom left corner round without using QPaint

regards
merry

**sabeesh** · 15th November 2007, 08:51

Hi.
Please search this link http://www.qtcentre.org/forum/f-qt-p...ners-3205.html

**merry** · 15th November 2007, 09:01

Hi Sabeesh

Thanx 4 sending me the link but this link is not opening

regards
merry

**jpn** · 15th November 2007, 09:29

Search the forum, please. Hint: search for "rounded corners".

**sabeesh** · 15th November 2007, 11:09

Hi,
Please try this.

http://www.qtcentre.org/forum/f-qt-p...ners-3205.html

**wysota** · 15th November 2007, 11:22

Or you can use stylesheets.

**merry** · 15th November 2007, 11:32

Thanx for the replies

When I use this

Qt Code:

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static QRegion roundedRect(const QRect& rect, int r)
{
    QRegion region;
    // middle and borders
    region += rect.adjusted(r, 0, -r, 0);
    region += rect.adjusted(0, r, 0, -r);
    // top left
    QRect corner(rect.topLeft(), QSize(r*2, r*2));
    region += QRegion(corner, QRegion::Ellipse);
    // top right
    corner.moveTopRight(rect.topRight());
    region += QRegion(corner, QRegion::Ellipse);
    // bottom left
    corner.moveBottomLeft(rect.bottomLeft());
    region += QRegion(corner, QRegion::Ellipse);
    // bottom right
    corner.moveBottomRight(rect.bottomRight());
    region += QRegion(corner, QRegion::Ellipse);
    return region;
}
 
someWidget->setMask(roundedRect(someWidget->rect(), 20));

static QRegion roundedRect(const QRect& rect, int r)
{
    QRegion region;
    // middle and borders
    region += rect.adjusted(r, 0, -r, 0);
    region += rect.adjusted(0, r, 0, -r);
    // top left
    QRect corner(rect.topLeft(), QSize(r*2, r*2));
    region += QRegion(corner, QRegion::Ellipse);
    // top right
    corner.moveTopRight(rect.topRight());
    region += QRegion(corner, QRegion::Ellipse);
    // bottom left
    corner.moveBottomLeft(rect.bottomLeft());
    region += QRegion(corner, QRegion::Ellipse);
    // bottom right
    corner.moveBottomRight(rect.bottomRight());
    region += QRegion(corner, QRegion::Ellipse);
    return region;
}
 
someWidget->setMask(roundedRect(someWidget->rect(), 20));

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All the corners of the widget get rounded , and I want only the bottom left and bottom right corners

If in the above code ,I wont make calculations for the top left and top right corners then

some part of the top left and top right corners is subtracted from the widget.

regards
merry

**pherthyl** · 15th November 2007, 17:19

You're creating a mask by putting together a combination of quarter circles and rectangles. Just think about how to build that. You'll need one rectangle for the widget minus the bottom edge, so width() and height()-r. Then you'll want the bottom left and right corners as shown above, and the bottom edge between the corners (width()-2*r and height is r)