classes.cxx

// classes.cxx (example 3a)

#include <fltk/run.h>
#include <fltk/Window.h>
#include <fltk/Slider.h>
#include <fltk/Button.h>
#include <fltk/IntInput.h>
#include <stdlib.h>
using namespace fltk;

static void exit_callback(Widget *, void *) {
  exit(0);
}

class SampleWindow : public Window {
  IntInput intinput;
  Button copy_button;
  Slider slider;
  Button down_button;
  Button up_button;
  Button exit_button;

  inline void copy_callback_i() {
    slider.value(intinput.ivalue());
  }
  static void copy_callback(Widget*, void* v) {
    ((SampleWindow*)v)->copy_callback_i();
  }

  inline void down_callback_i() {
    slider.value(slider.value()-1);
    intinput.value(slider.value());
  }
  static void down_callback(Widget*, void* v) {
    ((SampleWindow*)v)->down_callback_i();
  }

  inline void up_callback_i() {
    slider.value(slider.value()+1);
    intinput.value(slider.value());
  }
  static void up_callback(Widget*, void* v) {
    ((SampleWindow*)v)->up_callback_i();
  }

  inline void slider_callback_i(Slider* slider) {
    intinput.value(slider->value());
  }
  static void slider_callback(Widget* w, void* v) {
    ((SampleWindow*)v)->slider_callback_i((Slider*)w);
  }

public:

  SampleWindow(const char* label=0) :
    Window(USEDEFAULT,USEDEFAULT,320,90,label,true),
    intinput(10,10,100,20),
    copy_button(110,10,100,20,"copy to slider"),
    slider(10,35,300,20),
    down_button(50,60,50,20,"down"),
    up_button(150,60,50,20,"up"),
    exit_button(250,60,50,20,"exit")
  {
    copy_button.callback(copy_callback,this);
    down_button.callback(down_callback,this);
    up_button.callback(up_callback,this);
    slider.callback(slider_callback,this);
    slider.set_horizontal(); slider.type(Slider::TICK_ABOVE);
    slider.range(-10,10);
    slider.step(1);
    slider.value(0);
    exit_button.callback(exit_callback);
    end();
  }

  ~SampleWindow() {}

};

int main(int argc, char ** argv) {
  SampleWindow window1("Window 1");
  SampleWindow window2("Window 2");
  window1.show(argc,argv);
  window2.show();
  return run();
}