Re: [fltk.general] Fl

    You probably just need to change the cursor position to 0 after pre-setting the field's value,     and after the user finishes entering a value (when they hit ENTER or when they navigate     off the field).

    The docs say Fl_Input_::position(int p) is how to set the cursor position, so try     setting that to 0 after changing the value(), and ditto for the callback, assuming     you set when() to a value appropriate for your widget so the callback is invoked     at the right times.

    You can also preselect the text, so if someone navigates to the field and starts     typing a new value, since it's preselected, typing the first character replaces the     old value (instead of inserting). The user has the option to deselect first.