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// SPDX-License-Identifier: BSD-2-Clause
// Copyright (c) 2025 Kirill Dmitrievich
// File: hotbar.cc
// Description: Hotbar rendering
#include "client/pch.hh"
#include "client/gui/hotbar.hh"
#include "core/io/config_map.hh"
#include "core/resource/resource.hh"
#include "shared/world/item_registry.hh"
#include "client/config/keybind.hh"
#include "client/gui/settings.hh"
#include "client/gui/status_lines.hh"
#include "client/io/glfw.hh"
#include "client/resource/texture_gui.hh"
#include "client/globals.hh"
constexpr static float ITEM_SIZE = 40.0f;
constexpr static float ITEM_PADDING = 4.0f;
constexpr static float SELECTOR_PADDING = 2.0f;
constexpr static float HOTBAR_PADDING = 4.0f;
unsigned int hotbar::active_slot = 0U;
std::array<const Item*, HOTBAR_SIZE> hotbar::slots = {};
static config::KeyBind hotbar_keys[HOTBAR_SIZE];
static resource_ptr<TextureGUI> hotbar_background;
static resource_ptr<TextureGUI> hotbar_selector;
static ImU32 get_color_alpha(ImGuiCol style_color, float alpha)
{
const auto& color = ImGui::GetStyleColorVec4(style_color);
return ImGui::GetColorU32(ImVec4(color.x, color.y, color.z, alpha));
}
static void update_hotbar_item(void)
{
auto current_item = hotbar::slots[hotbar::active_slot];
if(current_item == nullptr) {
status_lines::unset(STATUS_HOTBAR);
}
else {
status_lines::set(STATUS_HOTBAR, current_item->get_name(), ImVec4(1.0f, 1.0f, 1.0f, 1.0f), 5.0f);
}
}
static void on_glfw_key(const GlfwKeyEvent& event)
{
if((event.action == GLFW_PRESS) && !globals::gui_screen) {
for(unsigned int i = 0U; i < HOTBAR_SIZE; ++i) {
if(hotbar_keys[i].equals(event.key)) {
hotbar::active_slot = i;
update_hotbar_item();
break;
}
}
}
}
static void on_glfw_scroll(const GlfwScrollEvent& event)
{
if(!globals::gui_screen) {
if(event.dy < 0.0) {
hotbar::next_slot();
return;
}
if(event.dy > 0.0) {
hotbar::prev_slot();
return;
}
}
}
void hotbar::init(void)
{
hotbar_keys[0].set_key(GLFW_KEY_1);
hotbar_keys[1].set_key(GLFW_KEY_2);
hotbar_keys[2].set_key(GLFW_KEY_3);
hotbar_keys[3].set_key(GLFW_KEY_4);
hotbar_keys[4].set_key(GLFW_KEY_5);
hotbar_keys[5].set_key(GLFW_KEY_6);
hotbar_keys[6].set_key(GLFW_KEY_7);
hotbar_keys[7].set_key(GLFW_KEY_8);
hotbar_keys[8].set_key(GLFW_KEY_9);
globals::client_config.add_value("hotbar.key.0", hotbar_keys[0]);
globals::client_config.add_value("hotbar.key.1", hotbar_keys[1]);
globals::client_config.add_value("hotbar.key.3", hotbar_keys[2]);
globals::client_config.add_value("hotbar.key.4", hotbar_keys[3]);
globals::client_config.add_value("hotbar.key.5", hotbar_keys[4]);
globals::client_config.add_value("hotbar.key.6", hotbar_keys[5]);
globals::client_config.add_value("hotbar.key.7", hotbar_keys[6]);
globals::client_config.add_value("hotbar.key.8", hotbar_keys[7]);
globals::client_config.add_value("hotbar.key.9", hotbar_keys[8]);
settings::add_keybind(10, hotbar_keys[0], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.0");
settings::add_keybind(11, hotbar_keys[1], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.1");
settings::add_keybind(12, hotbar_keys[2], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.2");
settings::add_keybind(13, hotbar_keys[3], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.3");
settings::add_keybind(14, hotbar_keys[4], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.4");
settings::add_keybind(15, hotbar_keys[5], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.5");
settings::add_keybind(16, hotbar_keys[6], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.6");
settings::add_keybind(17, hotbar_keys[7], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.7");
settings::add_keybind(18, hotbar_keys[8], settings_location::KEYBOARD_GAMEPLAY, "hotbar.slot.8");
hotbar_background = resource::load<TextureGUI>("textures/gui/hud_hotbar.png", TEXTURE_GUI_LOAD_CLAMP_S | TEXTURE_GUI_LOAD_CLAMP_T);
hotbar_selector = resource::load<TextureGUI>("textures/gui/hud_selector.png", TEXTURE_GUI_LOAD_CLAMP_S | TEXTURE_GUI_LOAD_CLAMP_T);
globals::dispatcher.sink<GlfwKeyEvent>().connect<&on_glfw_key>();
globals::dispatcher.sink<GlfwScrollEvent>().connect<&on_glfw_scroll>();
}
void hotbar::shutdown(void)
{
hotbar_background = nullptr;
hotbar_selector = nullptr;
}
void hotbar::layout(void)
{
auto& style = ImGui::GetStyle();
auto item_size = ITEM_SIZE * globals::gui_scale;
auto hotbar_width = HOTBAR_SIZE * item_size;
auto hotbar_padding = HOTBAR_PADDING * globals::gui_scale;
auto viewport = ImGui::GetMainViewport();
auto draw_list = ImGui::GetForegroundDrawList();
// Draw the hotbar background image
auto background_start = ImVec2(0.5f * viewport->Size.x - 0.5f * hotbar_width, viewport->Size.y - item_size - hotbar_padding);
auto background_end = ImVec2(background_start.x + hotbar_width, background_start.y + item_size);
draw_list->AddImage(hotbar_background->handle, background_start, background_end);
// Draw the hotbar selector image
auto selector_padding_a = SELECTOR_PADDING * globals::gui_scale;
auto selector_padding_b = SELECTOR_PADDING * globals::gui_scale * 2.0f;
auto selector_start = ImVec2(background_start.x + hotbar::active_slot * item_size - selector_padding_a,
background_start.y - selector_padding_a);
auto selector_end = ImVec2(selector_start.x + item_size + selector_padding_b, selector_start.y + item_size + selector_padding_b);
draw_list->AddImage(hotbar_selector->handle, selector_start, selector_end);
// Figure out item texture padding values
auto item_padding_a = ITEM_PADDING * globals::gui_scale;
auto item_padding_b = ITEM_PADDING * globals::gui_scale * 2.0f;
// Draw individual item textures in the hotbar
for(std::size_t i = 0; i < HOTBAR_SIZE; ++i) {
auto item = hotbar::slots[i];
if((item == nullptr) || (item->get_cached_texture() == nullptr)) {
// There's either no item in the slot
// or the item doesn't have a texture
continue;
}
const auto item_start = ImVec2(background_start.x + i * item_size + item_padding_a, background_start.y + item_padding_a);
const auto item_end = ImVec2(item_start.x + item_size - item_padding_b, item_start.y + item_size - item_padding_b);
draw_list->AddImage(item->get_cached_texture()->handle, item_start, item_end);
}
}
void hotbar::next_slot(void)
{
hotbar::active_slot += 1U;
hotbar::active_slot %= HOTBAR_SIZE;
update_hotbar_item();
}
void hotbar::prev_slot(void)
{
hotbar::active_slot += HOTBAR_SIZE - 1U;
hotbar::active_slot %= HOTBAR_SIZE;
update_hotbar_item();
}
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