I am trying to figure out which parts of the following code are represented by
each of the following steps. The code works, but I am confused as to why and
what makes each of the following steps it work
I think 'attach' puts it on the screen and 'next' just goes from the present
button to the next button
1. define the button:
2. get it displayed
3. define a function for the GUI to call
4. tell the GUI about that button and about that function
5. wait for the GUI to call our function
void show_scores() {
Simple_window score(Point(200,200), 300, 300, "scores");
string name = "scores.txt";
ifstream ist(name.c_str());
if (!ist) error("cannot open the file", name);
string username;
vector<Text> names;
vector<Text> scores;
int s;
for (int i=0; i<4; i++) {
ist>>username>>s;
Text t_text(Point(100, 50+30*(i+1)), username);
names.push_back(t_text);
stringstream ss;
ss << s;
Text s_text(Point(180, 50+30*(i+1)), ss.str());
scores.push_back(s_text);
}
for (int i=0; i<4; i++) {
score.attach(names[i]);
score.attach(scores[i]);
}
Text t_text(Point(100, 50), "Name");
Text s_text(Point(180, 50), "Score");
score.attach(t_text);
score.attach(s_text);
score.wait_for_button();
}
struct Lines_window: Window {
Lines_window(Point xy, int w, int h, const string& title);
//Open_polyline lines;
private:
// add (next_x.next_y) to lines
Button next_button;
Button quit_button;
Button highscore_button;
In_box next_x;
//In_box next_y;
Out_box xy_out;
// callback for next button
static void cb_next(Address, Address);
void next();
// callback for quit button
static void cb_quit(Address, Address);
static void button_next(Address, Address);
void quit();
void button();
};
Lines_window::Lines_window(Point xy, int w, int h, const string& title)
:Window(xy, w, h, title),
next_button(Point(x_max()-150, 0), 70, 20, "Enter word", cb_next),
quit_button(Point(x_max()-70, 0), 70, 20, "Quit", cb_quit),
next_x(Point(x_max()-310, 0), 70, 20, "word "),
//next_y(Point(x_max()-210, 0), 50, 20, "next y: "),
xy_out(Point(100, 0), 100, 20, "score "),
highscore_button(Point(x_max()-100, 30), 100, 20, "High scores", button_next)
{
attach(next_button);
attach(quit_button);
attach(highscore_button);
attach(next_x);
//attach(next_y);
attach(xy_out);
//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 delete window
}
void Lines_window::cb_next(Address, Address pw) // the usual
{
reference_to<Lines_window>(pw).next();
}
void Lines_window::next() {
string x = next_x.get_string();
//int y = next_y.get_int();
//lines.add(Point(x, y));
// update current position readout:
//stringstream ss;
//ss << '(' << x << ',' << y << ')';
//ss << '(' << x <<')';
//xy_out.put(ss.str());
redraw();
}
void Lines_window::button_next(Address, Address pw) // the usual
{
reference_to<Lines_window>(pw).button();
}
void Lines_window::button()
{
// curious FLTK idiom delete window
show_scores();
}
int main()
try {
Lines_window win(Point(100, 100), 600, 400, "lines");
return gui_main();
}
catch(exception& e) {
cerr << "exception: " << e.what() << '\n';
return 1;
}
catch(...) {
cerr << "Some exceptionn\n: ";
return 2;
}
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