help_message.h

#pragma once
 
#include <cgv/gui/dialog.h>
#include <cgv/gui/provider.h>
 
namespace cgv {
namespace gui {
 
class help_message {
protected:
    std::string message = "";
 
public:
    void clear() {
 
        message.clear();
    }
 
    void add_line(const std::string& line) {
 
        if(!message.empty())
            message += "\n";
 
        message += line;
    }
 
    void add_bullet_point(const std::string& line) {
        
        add_line("  -\t" + line);
    }
 
    void show() const {
 
        cgv::gui::message(message);
    }
 
    void create_gui(cgv::gui::provider* p) const {
        
        cgv::gui::button_ptr btn = p->add_button("?", "w=0;font_style='bold';tooltip='Show help'", "");
        
        int x = btn->get<int>("x");
        int y = btn->get<int>("y");
 
        cgv::base::group_ptr group = btn->get_parent() ? btn->get_parent()->get_group() : nullptr;
        
        if(group->get_nr_children() > 1) {
            cgv::base::base_ptr last_child = group->get_child(group->get_nr_children() - 2);
 
            int last_x = last_child->get<int>("x");
            int last_y = last_child->get<int>("y");
            int last_w = last_child->get<int>("w");
            int last_h = last_child->get<int>("h");
 
            x = last_x + (last_w > 200 ? last_w - 20 : 180);
            y = last_y;
 
        } else {
            x += 180;
        }
 
        btn->set("x", x);
        btn->set("y", y);
        btn->set("w", 20);
 
        connect_copy(btn->click, cgv::signal::rebind(this, &help_message::show));
    }
};
 
}
}