//
// This is example code from Chapter 16.5 "An example" of
// "Programming -- Principles and Practice Using C++" by Bjarne Stroustrup
// style

#include <iostream>
#include <sstream>
#include "Graph.h"         // get access to our graphics library facilities
#include "GUI.h"
#include "Window.h"
#include "..\GUI\My_window.h"

using namespace Graph_lib;
using namespace std;

//------------------------------------------------------------------------------

struct Lines_window : Graph_lib::Window {
    Lines_window(Point xy, int w, int h, const string& title );
private:
    // Data:
    Open_polyline lines;

    // Widgets:
    Button next_button;    // add (next_x,next_y) to lines
    Button quit_button;    // end program
    In_box next_x;
    In_box next_y;
    Out_box xy_out;
    Menu color_menu;
    Menu style_menu;
    Button cmenu_button;
    Button smenu_button;

    void change_col(Color c) { lines.set_color(c); }
    void change_sty(int t) {lines.set_style(Line_style{Line_style::solid,t}); }
    void hide_cmenu() { color_menu.hide(); cmenu_button.show(); }
    void hide_smenu() { style_menu.hide(); smenu_button.show(); }

    /// actions invoked by callbacks:
    void red_pressed() { change_col(Color::red); hide_cmenu(); }
    void blue_pressed() { change_col(Color::blue); hide_cmenu(); }
    void black_pressed() { change_col(Color::black); hide_cmenu(); }
    void thick_pressed() { change_sty(1); hide_smenu(); }
    void thicker_pressed() { change_sty(2); hide_smenu(); }
    void thickest_pressed() { change_sty(3); hide_smenu(); }

    void cmenu_pressed() { cmenu_button.hide(); color_menu.show(); }
    void smenu_pressed() { smenu_button.hide(); style_menu.show(); }
    void next();
    void quit();

    /// callback functions:
    static void cb_red(Address, Address);
    static void cb_blue(Address, Address);
    static void cb_black(Address, Address);
    static void cb_thick(Address, Address);
    static void cb_thicker(Address, Address);
    static void cb_thickest(Address, Address);
    static void cb_cmenu(Address, Address);
    static void cb_smenu(Address, Address);
    static void cb_next(Address, Address);
    static void cb_quit(Address, Address);
};

//------------------------------------------------------------------------------

Lines_window::Lines_window(Point xy, int w, int h, const string& title)
    :Window(xy,w,h,title),
     color_menu(Point(x_max()-70,30),70,20,Menu::vertical,"color"),
     style_menu(Point(x_max()-140,30),70,20,Menu::vertical,"style"),
     cmenu_button(Point(x_max()-80,30), 80, 20, "color menu", cb_cmenu),
     smenu_button(Point(x_max()-160,30), 80, 20, "style menu", cb_smenu),
     next_button(Point(x_max()-150,0), 70, 20, "Next point", cb_next),
     quit_button(Point(x_max()-70,0), 70, 20, "Quit", cb_quit),
     next_x(Point(x_max()-310,0), 50, 20, "next x:"),
     next_y(Point(x_max()-210,0), 50, 20, "next y:"),
     xy_out(Point(100,0), 100, 20, "current (x,y):")
{
    attach(next_button);
    attach(quit_button);
    attach(next_x);
    attach(next_y);
    attach(xy_out);
    xy_out.put("no point");
    color_menu.attach(new Button(Point(0,0),0,0,"red",cb_red));
    color_menu.attach(new Button(Point(0,0),0,0,"blue",cb_blue));
    color_menu.attach(new Button(Point(0,0),0,0,"black",cb_black));
    style_menu.attach(new Button(Point(0,0),0,0,"thick",cb_thick));
    style_menu.attach(new Button(Point(0,0),0,0,"thicker",cb_thicker));
    style_menu.attach(new Button(Point(0,0),0,0,"thickest",cb_thickest));
    attach(color_menu);
    attach(style_menu);

    color_menu.hide();
    style_menu.hide();
    attach(cmenu_button);
    attach(smenu_button);
    attach(lines);
}

//------------------------------------------------------------------------------

void Lines_window::cb_quit(Address, Address pw)    // "the usual"
{
       reference_to<Lines_window>(pw).quit();
}

//------------------------------------------------------------------------------

void Lines_window::quit()
{
    hide();        // curious FLTK idiom for delete window
}

//------------------------------------------------------------------------------

void Lines_window::cb_next(Address, Address pw)     // "the usual"
{
       reference_to<Lines_window>(pw).next();
}

//------------------------------------------------------------------------------

void Lines_window::next()
{
    int x = next_x.get_int();
    int y = next_y.get_int();

    lines.add(Point(x,y));

    // update current position readout:
    stringstream ss;
    ss << '(' << x << ',' << y << ')';
    xy_out.put(ss.str());

      redraw();
}

//------------------------------------------------------------------------------

void Lines_window::cb_red(Address, Address pw)      /// "the usual"
{
    reference_to<Lines_window>(pw).red_pressed();
}

//------------------------------------------------------------------------------

void Lines_window::cb_blue(Address, Address pw)     // "the usual"
{
    reference_to<Lines_window>(pw).blue_pressed();
}

//------------------------------------------------------------------------------

void Lines_window::cb_black(Address, Address pw)    // "the usual"
{
    reference_to<Lines_window>(pw).black_pressed();
}

//------------------------------------------------------------------------------

void Lines_window::cb_thick(Address, Address pw)    // "the usual"
{
    reference_to<Lines_window>(pw).thick_pressed();
}
void Lines_window::cb_thicker(Address, Address pw)    // "the usual"
{
    reference_to<Lines_window>(pw).thicker_pressed();
}
void Lines_window::cb_thickest(Address, Address pw)    // "the usual"
{
    reference_to<Lines_window>(pw).thickest_pressed();
}


//------------------------------------------------------------------------------
void Lines_window::cb_cmenu(Address, Address pw)     // "the usual"
{
    reference_to<Lines_window>(pw).cmenu_pressed();
}
//------------------------------------------------------------------------------
void Lines_window::cb_smenu(Address, Address pw)     // "the usual"
{
    reference_to<Lines_window>(pw).smenu_pressed();
}
//------------------------------------------------------------------------------

int main()
try {
    Lines_window win(Point(100,100),600,400,"lines");
    My_window mwin(Point(700,500),200,50,"my");
    return gui_main();
}
catch(exception& e) {
    cerr << "exception: " << e.what() << '\n';
    return 1;
}
catch (...) {
    cerr << "Some exception\n";
    return 2;
}

//------------------------------------------------------------------------------