The Constructor

The constructor should have the following arguments:

MyClass(int x, int y, int w, int h, const char *label = 0);

This will allow the class to be used in FLUID without problems.

The constructor must call the constructor for the base class and pass the same arguments:

MyClass::MyClass(int x, int y, int w, int h, const char *label)
: Fl_Widget(x, y, w, h, label) {
// do initialization stuff...
}

Fl_Widget's protected constructor sets x(), y(), w(), h(), and label() to the passed values and initializes the other instance variables to:

type(0);
box(FL_NO_BOX);
color(FL_GRAY);
selection_color(FL_GRAY);
labeltype(FL_NORMAL_LABEL);
labelstyle(FL_NORMAL_STYLE);
labelsize(FL_NORMAL_SIZE);
labelcolor(FL_BLACK);
align(FL_ALIGN_CENTER);
callback(default_callback,0);
flags(ACTIVE|VISIBLE);