Qt C++ Minimum size of resizable rectangle

Question

In my application I have rectangle which I can resize (manually implemented mouse events for resizing). My problem is that I can resize my rectangle in any size. How can I implement function which forbids to resize under 100x100 pixels. In other words I want function which sets minimum size for rectangle so user can't resize that rectangle under 100x100 pixels. If needed I will provide parts of mine code, but for now I need idea or pseudo code.

here is a nice article http://stackoverflow.com/questions/4553304/help-needed-to-understand-form-layout-mechanisms-in-qt — camino, Apr 03 '13 at 21:36
Thanks but rectangle doesn't have sizeHint and I resize rectangle by mouse, it's size is not affected by size of other components or mainwindow — Alen, Apr 03 '13 at 21:47
add the size constraint in the mouseevent, where you are calculating the rectangle size. — UmNyobe, Apr 04 '13 at 08:08

score 0 · Accepted Answer · answered Apr 04 '13 at 04:58

0

If you have already written the code, which resizes your rectangle, all you need to add is something like this:

QRect r = oldRect();
switch (border)
{
    case Left:
        r.setLeft(newLeftPos());
        if (r.width() < minimumWidth())
            r.setLeft(r.right() - minimumWidth());
    break;

    ...

}
draw(r);

answered Apr 04 '13 at 04:58

Amartel

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What's the Left case. Is that case when I move left side of rectangle? – Alen Apr 04 '13 at 10:55
Exactly. The same code should be written for all other sides (and corners, if you want to) of the rectangle. – Amartel Apr 04 '13 at 15:08
Thank you, your idea is perfect for my application – Alen Apr 04 '13 at 19:13

Qt C++ Minimum size of resizable rectangle

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