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qt:property WIDGET PROPprocedure
 (set! (qt:property WIDGET PROP) VALUE)

Get or set a widget property with the name PROP (a string or symbol). See the Qt documentation for more information about which widget supports which properties. Value conversion is automatically, the following value types are supported:

Property (C++) type    Scheme type
QString                string
int                    integer
double                 number
bool                   boolean
char                   char
QPixmap                <qt-image>
Point                  s32vector
Size                   s32vector
Rect                   s32vector
PointF                 f64vector
SizeF                  f64vector
RectF                  f64vector