view_promt.cpp

#include "view_promt.h"
 
void ViewPromt::draw()
{
    curs_set(1); // show cursor
    
    int li = text_offset_y;
    int ci = 0;
    for(std::string line : str_split(message + input, "\n"))
    {
        mvwprintw(win, ++li, text_offset_x, "%s", line.c_str());
        ci = line.length() + text_offset_x;
    }
    
    button_offset_x = (width - label_cancel.length() - sep.length() - label_confirm.length()) / 2;
    button_offset_y = height - text_offset_y;
    
    if(selection == 0)
    {
        wattron(win, A_REVERSE);
        mvwprintw(win, button_offset_y, button_offset_x, "%s", label_cancel.c_str());
        wattroff(win, A_REVERSE);
        mvwprintw(win, button_offset_y, button_offset_x + label_cancel.length(), "%s", sep.c_str());
        mvwprintw(win, button_offset_y, button_offset_x + label_cancel.length() + sep.length(), "%s", label_confirm.c_str());
    }
    else
    {
        mvwprintw(win, button_offset_y, button_offset_x, "%s", label_cancel.c_str());
        mvwprintw(win, button_offset_y, button_offset_x + label_cancel.length(), "%s", sep.c_str());
        wattron(win, A_REVERSE);
        mvwprintw(win, button_offset_y, button_offset_x + label_cancel.length() + sep.length(), "%s", label_confirm.c_str());
        wattroff(win, A_REVERSE);
    }
    wmove(win, li, ci);
}
 
void ViewPromt::setMessage(std::string message)
{
    this->message = message;
}
 
void ViewPromt::setConfirm(std::string name, std::function<void(int)> call)
{
    label_confirm = name;
    call_confirm = call;
}
 
void ViewPromt::setCancel(std::string name, bool cancelable)
{
    label_cancel = name;
    this->cancelable = cancelable;
}
 
std::string ViewPromt::getInput()
{
    return input;
}
 
std::function<void(int)> ViewPromt::keypress(int& key)
{   
    std::function<void(int)> ret = nullptr;
    switch(key)
    {
        case KEY_BACKSPACE:
            if(input.length())
                input.pop_back();
            break;
        case '\t':
        case KEY_LEFT:
        case KEY_RIGHT:
            selection = (selection + 1 ) % 2;
            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 + button_offset_x;
                size_t row_start = start_y + button_offset_y;
                size_t mouse_x = event.x, mouse_y = event.y;
                if(mouse_y == row_start)
                {
                    if(cancelable && mouse_x >= column_start && mouse_x < column_start + label_cancel.length())
                    {
                        if(selection == 0 || event.bstate & BUTTON1_DOUBLE_CLICKED)
                            hit = true;
                        selection = 0;
                    }
                    if(mouse_x >= column_start + label_cancel.length() + sep.length() && mouse_x < column_start + label_cancel.length() + sep.length()  + label_confirm.length())
                    {
                        if(selection == 1 || event.bstate & BUTTON1_DOUBLE_CLICKED)
                            hit = true;
                        selection = 1;
                    }
                }
            }
            if(!hit)
                break;
            
            // fall through to next case
            [[fallthrough]];
        }
        case KEY_ENT:
            if(selection == 0) // exit
                key = -1; // do return from view
            else
                ret = call_confirm;
            break;
        default:
            break;
    }
    
    if(key >= ' ' && key <= '~')
        input += (char) key;
    
    if(key != KEY_ENT)
        repaint();
    return ret;
}