Until now ,I know how to react to a certain event,but judging form the
information provided by the help documentation "FL_DND_* events cannot be used
in widgets derived from Fl_Group or Fl_Window",does it means that it's
impossible for FLTK to make a window support drag and drop file event?I am
trying to make a window accept dargging and dropping a file then open it by
certain method.Can anybody help me. Thanks a lot!
By the way,the advice from Herman and Greg Ercolano helps me a lot,here,I want
to say thank you for your help!
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