QPixmapStyle: do not assume minimum == 0 when painting progress bars

The arithmetic used to calculate the size of the progress bar fill in
QPixmapStyle assumed minimum == 0, but that does not necessarily
hold, since the minimum value is user-defined.

So, fix the arithmetic to take the minimum into account, taking care,
as done elsewhere, to avoid signed integer and qreal=float overflows,
by using qint64 and double, respectively.

[ChangeLog][QtWidgets][QPixmapStyle] Now handles progress bars with
minimum != 0 correctly.

Change-Id: I738ded56e8234716c36a5e9fde15bae691c43a35
Reviewed-by: David Faure <david.faure@kdab.com>

0 files changed, 0 insertions, 0 deletions