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#include "sdl_selectlist.hpp"
static const Uint32 vpadding = 5;
SdlSelectList::SdlSelectList(const std::string& title, const std::vector<std::string>& labels)
: _window(nullptr), _renderer(nullptr)
{
const size_t widget_height = 50;
const size_t widget_width = 600;
const size_t total_height = labels.size() * (widget_height + vpadding) + vpadding;
_window = SDL_CreateWindow(title.c_str(), SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
widget_width, total_height + widget_height,
SDL_WINDOW_ALLOW_HIGHDPI | SDL_WINDOW_MOUSE_FOCUS |
SDL_WINDOW_INPUT_FOCUS);
if (_window == nullptr)
{
widget_log_error(-1, "SDL_CreateWindow");
}
else
{
_renderer = SDL_CreateRenderer(_window, -1, SDL_RENDERER_ACCELERATED);
if (_renderer == nullptr)
{
widget_log_error(-1, "SDL_CreateRenderer");
}
else
{
SDL_Rect rect = { 0, 0, widget_width, widget_height };
for (auto& label : labels)
{
_list.emplace_back(_renderer, label, rect);
rect.y += widget_height + vpadding;
}
const std::vector<int> buttonids = { INPUT_BUTTON_ACCEPT, INPUT_BUTTON_CANCEL };
const std::vector<std::string> buttonlabels = { "accept", "cancel" };
_buttons.populate(
_renderer, buttonlabels, buttonids, widget_width, static_cast<Sint32>(total_height),
static_cast<Sint32>(widget_width / 2), static_cast<Sint32>(widget_height));
_buttons.set_highlight(0);
}
}
}
SdlSelectList::~SdlSelectList()
{
_list.clear();
_buttons.clear();
SDL_DestroyRenderer(_renderer);
SDL_DestroyWindow(_window);
}
int SdlSelectList::run()
{
int res = -2;
ssize_t CurrentActiveTextInput = 0;
bool running = true;
if (!_window || !_renderer)
return -2;
try
{
while (running)
{
if (!clear_window(_renderer))
throw;
if (!update_text())
throw;
if (!_buttons.update(_renderer))
throw;
SDL_Event event = { 0 };
SDL_WaitEvent(&event);
switch (event.type)
{
case SDL_KEYDOWN:
switch (event.key.keysym.sym)
{
case SDLK_UP:
case SDLK_BACKSPACE:
if (CurrentActiveTextInput > 0)
CurrentActiveTextInput--;
else
CurrentActiveTextInput = _list.size() - 1;
break;
case SDLK_DOWN:
case SDLK_TAB:
if (CurrentActiveTextInput < 0)
CurrentActiveTextInput = 0;
else
CurrentActiveTextInput++;
CurrentActiveTextInput = CurrentActiveTextInput % _list.size();
break;
case SDLK_RETURN:
case SDLK_RETURN2:
case SDLK_KP_ENTER:
running = false;
res = CurrentActiveTextInput;
break;
case SDLK_ESCAPE:
running = false;
res = INPUT_BUTTON_CANCEL;
break;
default:
break;
}
break;
case SDL_MOUSEMOTION:
{
ssize_t TextInputIndex = get_index(event.button);
reset_mouseover();
if (TextInputIndex >= 0)
{
auto& cur = _list[TextInputIndex];
if (!cur.set_mouseover(_renderer, true))
throw;
}
_buttons.set_mouseover(event.button.x, event.button.y);
}
break;
case SDL_MOUSEBUTTONDOWN:
{
auto button = _buttons.get_selected(event.button);
if (button)
{
running = false;
if (button->id() == INPUT_BUTTON_CANCEL)
res = INPUT_BUTTON_CANCEL;
else
res = CurrentActiveTextInput;
}
else
{
CurrentActiveTextInput = get_index(event.button);
}
}
break;
case SDL_QUIT:
res = INPUT_BUTTON_CANCEL;
running = false;
break;
default:
break;
}
reset_highlight();
if (CurrentActiveTextInput >= 0)
{
auto& cur = _list[CurrentActiveTextInput];
if (!cur.set_highlight(_renderer, true))
throw;
}
SDL_RenderPresent(_renderer);
}
}
catch (...)
{
return -1;
}
return res;
}
ssize_t SdlSelectList::get_index(const SDL_MouseButtonEvent& button)
{
const Sint32 x = button.x;
const Sint32 y = button.y;
for (size_t i = 0; i < _list.size(); i++)
{
auto& cur = _list[i];
auto r = cur.rect();
if ((x >= r.x) && (x <= r.x + r.w) && (y >= r.y) && (y <= r.y + r.h))
return i;
}
return -1;
}
bool SdlSelectList::update_text()
{
for (auto& cur : _list)
{
if (!cur.update_text(_renderer))
return false;
}
return true;
}
void SdlSelectList::reset_mouseover()
{
for (auto& cur : _list)
{
cur.set_mouseover(_renderer, false);
}
}
void SdlSelectList::reset_highlight()
{
for (auto& cur : _list)
{
cur.set_highlight(_renderer, false);
}
}
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