Wizard.cpp

#include <FL/Fl.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Wizard.H>
#include <FL/Fl_Window.H>

namespace Examples {
  class Main_Window : public Fl_Window {
  public:
    Main_Window() : Fl_Window {200, 100, 390, 315, "Wizard example"} {
      box1.align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
      box2.align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
      box3.align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
      box4.align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
      
      previous_button.deactivate();
      previous_button.callback([](Fl_Widget* sender, void* data) {
        auto window = reinterpret_cast<Main_Window*>(data);
        window->wizard.prev();
        window->update_buttons();
      }, this);
      
      next_button.callback([](Fl_Widget* sender, void* data) {
        auto window = reinterpret_cast<Main_Window*>(data);
        window->wizard.next();
        window->update_buttons();
      }, this);
    }
    
  private:
    void update_buttons() {
      if (wizard.value() != &page1) previous_button.activate();
      else previous_button.deactivate();
      
      if (wizard.value() != &page4) next_button.activate();
      else  next_button.deactivate();
    }
    
    Fl_Wizard wizard {10, 10, 370, 250};
    Fl_Group page1 {10, 10, 370, 250};
    Fl_Box box1 {20, 20, 150, 25, "Page 1"};
    Fl_End end_page1;
    Fl_Group page2 {10, 10, 370, 250};
    Fl_Box box2 {20, 20, 150, 25, "Page 2"};
    Fl_End end_page2;
    Fl_Group page3 {10, 10, 370, 250};
    Fl_Box box3 {20, 20, 150, 25, "Page 3"};
    Fl_End end_page3;
    Fl_Group page4 {10, 10, 370, 250};
    Fl_Box box4 {20, 20, 150, 25, "Page 4"};
    Fl_End end_page4;
    Fl_End end_wizard;
    Fl_Button previous_button {10, 270, 75, 25, "<"};
    Fl_Button next_button {100, 270, 75, 25, ">"};
  };
}

auto main(int argc, char *argv[]) -> int {
  auto window = Examples::Main_Window {};
  window.show(argc, argv);
  return Fl::run();
}