ProgressBar: add validation for Fraction setter Gtk backend doesn't allow setting a MinValue or MaxValue, so Xwt uses the same assumed max and min values by the Gtk backend, and adjust the other 2 backends to this limits.
ProgressBar: add validation for Fraction setter
Gtk backend doesn't allow setting a MinValue or MaxValue, so Xwt
uses the same assumed max and min values by the Gtk backend, and
adjust the other 2 backends to this limits.
mminns/xwt,lytico/xwt,antmicro/xwt,sevoku/xwt,mminns/xwt,directhex/xwt,hwthomas/xwt,akrisiun/xwt,iainx/xwt,TheBrainTech/xwt,hamekoz/xwt,residuum/xwt,cra0zy/xwt,steffenWi/xwt,mono/xwt