114 lines
2.3 KiB
C++
114 lines
2.3 KiB
C++
#include <assert.h>
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#include <algorithm>
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#include "sdl_buttons.hpp"
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static const Uint32 hpadding = 10;
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SdlButtonList::SdlButtonList()
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{
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}
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bool SdlButtonList::populate(SDL_Renderer* renderer, const std::vector<std::string>& labels,
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const std::vector<int>& ids, Sint32 total_width, Sint32 offsetY,
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Sint32 width, Sint32 height)
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{
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assert(renderer);
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assert(width >= 0);
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assert(height >= 0);
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assert(labels.size() == ids.size());
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_list.clear();
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size_t button_width = ids.size() * (width + hpadding) + hpadding;
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size_t offsetX = total_width - std::min<size_t>(total_width, button_width);
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for (size_t x = 0; x < ids.size(); x++)
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{
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const size_t curOffsetX = offsetX + x * (static_cast<size_t>(width) + hpadding);
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const SDL_Rect rect = { static_cast<int>(curOffsetX), offsetY, width, height };
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_list.push_back({ renderer, labels[x], ids[x], rect });
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}
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return true;
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}
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SdlButtonList::~SdlButtonList()
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{
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}
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SdlButton* SdlButtonList::get_selected(const SDL_MouseButtonEvent& button)
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{
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const Sint32 x = button.x;
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const Sint32 y = button.y;
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return get_selected(x, y);
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}
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SdlButton* SdlButtonList::get_selected(Sint32 x, Sint32 y)
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{
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for (auto& btn : _list)
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{
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auto r = btn.rect();
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if ((x >= r.x) && (x <= r.x + r.w) && (y >= r.y) && (y <= r.y + r.h))
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return &btn;
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}
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return nullptr;
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}
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bool SdlButtonList::set_highlight_next(bool reset)
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{
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if (reset)
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_highlighted = nullptr;
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else
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{
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auto next = _highlight_index++;
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_highlight_index %= _list.size();
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auto& element = _list[next];
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_highlighted = &element;
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}
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return true;
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}
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bool SdlButtonList::set_highlight(size_t index)
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{
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if (index >= _list.size())
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{
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_highlighted = nullptr;
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return false;
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}
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auto& element = _list[index];
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_highlighted = &element;
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_highlight_index = ++index % _list.size();
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return true;
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}
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bool SdlButtonList::set_mouseover(Sint32 x, Sint32 y)
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{
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_mouseover = get_selected(x, y);
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return _mouseover != nullptr;
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}
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void SdlButtonList::clear()
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{
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_list.clear();
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_mouseover = nullptr;
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_highlighted = nullptr;
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_highlight_index = 0;
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}
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bool SdlButtonList::update(SDL_Renderer* renderer)
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{
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assert(renderer);
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for (auto& btn : _list)
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{
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if (!btn.update(renderer))
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return false;
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}
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if (_highlighted)
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_highlighted->highlight(renderer);
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if (_mouseover)
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_mouseover->mouseover(renderer);
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return true;
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}
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