listbox.cpp

#include "listbox.hpp"
#include "widget.hpp"
#include "graphics.hpp"
using namespace genv;
using namespace std;

ListBox::ListBox(Application* parent,int x, int y, int sizex, int sizey, vector<string> s) : Widget(parent,x,y,sizex,sizey), _s(s), _scroll(0), displaynum(0), _selected(-1)
{

}


void ListBox::draw()
{
    gout.load_font("LiberationSans-Regular.ttf",20);
    int height = gout.cascent()+gout.cdescent()+2;
    int displaynum = _sizey/height;

    if(displaynum > _s.size())
    {
        displaynum = _s.size();


    }
    _sizey = displaynum * height;

    int ypos = 0;

    gout << move_to(_x, _y) << color(200,200,200) << box (_sizex+2, displaynum*height);

    for (int i = _scroll; i < _scroll + displaynum and i < _s.size(); ++i)
    {

        if(i != _selected){
            {
                gout << move_to(_x+1, _y+ypos) << color(0,0,0) << box (_sizex, height) << move_to(_x+2, _y+ypos) << color(255,255,255) << text(_s[i]) << move_to(_x, _y+ypos)
                     <<  color(200,200,200) << line(_sizex, 0);
            }

        }
        if(i == _selected){
            {
                gout << move_to(_x+1, _y+ypos) << color(0,0,0) << box (_sizex, height) << move_to(_x+2, _y+ypos) << color(255,0,255) << text(_s[i]) << move_to(_x, _y+ypos)
                     <<  color(200,200,200) << line(_sizex, 0);
            }
            //ypos += height;
        }
        ypos += height;


    }
    gout << move_to(_x, _y + ypos) << color(200,200,200) << line(_sizex, 0) << refresh;






}



void ListBox::handle(event ev)
{


    gout.load_font("LiberationSans-Regular.ttf",20);
    int height = gout.cascent()+gout.cdescent()+2;
    int displaynum = _sizey/height;
    int max_scroll = _s.size()-displaynum;
    if(ev.type == ev_mouse)
    {
        if(isover(ev.pos_x, ev.pos_y) and (ev.button == btn_wheeldown or ev.button == btn_middle))
        {
            if(_scroll < max_scroll)
            {
                _scroll++;
            }
        }
        if(isover(ev.pos_x, ev.pos_y) and (ev.button == btn_wheelup or ev.button == btn_right))
        {
            if (_scroll > 0)
            {
                _scroll--;
            }
        }

        for (int i = 0; i < displaynum; ++i)
        {
            if(i == 0)
            {
                if(ev.pos_x > _x and ev.pos_x < _x + _sizex and ev.pos_y < height+_y and ev.pos_y > _y and ev.button == btn_left )
                {
                    _selected = i + _scroll;
                }
            }
            if(i > 0){
                if(ev.pos_x > _x and ev.pos_x < _x + _sizex and ev.pos_y < _y+i*2*height and ev.pos_y > _y+i*height and ev.button == btn_left )
                {
                    _selected = i + _scroll;
                }
            }
        }
        if(!isover(ev.pos_x,ev.pos_y) and ev.button == btn_left)
        {
            _selected = -1;
        }
    }
}
bool ListBox::isover(int ms_x, int ms_y)
{
    return (ms_x >= _x) and (ms_x <= _x + _sizex) and (ms_y >= _y) and (ms_y <= _y + _sizey);
}
string ListBox::getter()
{
    return _s[_selected];
}