def cmd_view_proj(self):
if self.win_view_proj:
self.win_view_proj.focus_force()
return
# Create window from class and save pointer
self.win_view_proj = WinViewProj(master=self.master)
# Bind handler on destroying to clean up self class
self.win_view_proj.bind("<Destroy>", self.handle_destroy_win_view_proj)
