view_selection.cpp

#include "view_selection.h"
 
void ViewSelection::draw()
{
    //curs_set(0); // hide cursor
    for(size_t i = 0; i < choices.size(); i++)
    {
        if(selection == i)
            wattron(win, A_REVERSE);
        mvwprintw(win, i + choice_offset_y, choice_offset_x, "%s", choices[i].c_str());
        if(selection == i)
            wattroff(win, A_REVERSE);
    }
}
 
void ViewSelection::addChoice(std::string name, call_t call)
{
    choices.push_back(name);
    calls.push_back(call);
}
 
call_t ViewSelection::keypress(int& key)
{
    call_t ret = nullptr;
    switch(key)
    {
    case KEY_UP:
        do
            selection = (selection - 1 + choices.size()) % choices.size();
        while(!choices[selection].length() && choices.size());
        break;
 
    case '\t':
    case KEY_DOWN:
        do
            selection = (selection + 1) % choices.size();
        while(!choices[selection].length() && choices.size());
        break;
 
    case KEY_MOUSE:
    {
        // http://pronix.linuxdelta.de/C/Linuxprogrammierung/Linuxsystemprogrammieren_C_Kurs_Kapitel10b.shtml
        MEVENT event;
        bool hit = false;
        if(getmouse(&event) == OK && event.bstate & (BUTTON1_CLICKED | BUTTON1_DOUBLE_CLICKED))
        {
            size_t column_start = start_x + choice_offset_x;
            size_t row_start = start_y + choice_offset_y;
            size_t mouse_x = event.x, mouse_y = event.y;
            for(size_t i = 0; i < choices.size(); i++)
                if(choices[i].length() && mouse_y == row_start + i && mouse_x >= column_start && mouse_x < column_start + choices[i].length())
                {
                    if(selection == i || event.bstate & BUTTON1_DOUBLE_CLICKED)
                        hit = true;
                    selection = i;
                }
        }
        if(!hit)
            break;
 
        // fall through to next case
        [[fallthrough]];
    }
 
    case KEY_ENT:
        if(selection == choices.size() - 1) // exit
            key = -1; // do return from view
        else
            ret = calls[selection];
        break;
    default:
        break;
    }
    repaint();
    return ret;
}