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#include "client/pch.hh"
#include "client/gui/progress_bar.hh"
#include "core/math/constexpr.hh"
#include "client/gui/language.hh"
#include "client/globals.hh"
constexpr static ImGuiWindowFlags WINDOW_FLAGS = ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoDecoration;
static std::string str_title;
static std::string str_button;
static gui::progress_bar_action button_action;
void gui::progress_bar::init(void)
{
str_title = "Loading";
str_button = std::string();
button_action = nullptr;
}
void gui::progress_bar::layout(void)
{
const auto viewport = ImGui::GetMainViewport();
const auto window_start = ImVec2(0.0f, viewport->Size.y * 0.30f);
const auto window_size = ImVec2(viewport->Size.x, viewport->Size.y * 0.70f);
ImGui::SetNextWindowPos(window_start);
ImGui::SetNextWindowSize(window_size);
if(ImGui::Begin("###UIProgress", nullptr, WINDOW_FLAGS)) {
ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0.0f, 1.0f * globals::gui_scale));
const float title_width = ImGui::CalcTextSize(str_title.c_str()).x;
ImGui::SetCursorPosX(0.5f * (window_size.x - title_width));
ImGui::TextUnformatted(str_title.c_str());
ImGui::Dummy(ImVec2(0.0f, 8.0f * globals::gui_scale));
const ImVec2 cursor = ImGui::GetCursorPos();
const std::size_t num_bars = 32;
const float spinner_width = 0.8f * ImGui::CalcItemWidth();
const float bar_width = spinner_width / static_cast<float>(num_bars);
const float bar_height = 0.5f * ImGui::GetFrameHeight();
const float base_xpos = window_start.x + 0.5f * (window_size.x - spinner_width) + 0.5f;
const float base_ypos = window_start.y + cursor.y;
const float phase = 2.0f * ImGui::GetTime();
const ImVec4& background = ImGui::GetStyleColorVec4(ImGuiCol_Button);
const ImVec4& foreground = ImGui::GetStyleColorVec4(ImGuiCol_PlotHistogram);
for(std::size_t i = 0; i < num_bars; ++i) {
const float sinval = std::sin(M_PI * static_cast<float>(i) / static_cast<float>(num_bars) - phase);
const float modifier = std::exp(-8.0f * (0.5f + 0.5f * sinval));
ImVec4 color = {};
color.x = math::lerp(background.x, foreground.x, modifier);
color.y = math::lerp(background.y, foreground.y, modifier);
color.z = math::lerp(background.z, foreground.z, modifier);
color.w = math::lerp(background.w, foreground.w, modifier);
const ImVec2 start = ImVec2(base_xpos + bar_width * i, base_ypos);
const ImVec2 end = ImVec2(start.x + bar_width, start.y + bar_height);
ImGui::GetWindowDrawList()->AddRectFilled(start, end, ImGui::GetColorU32(color));
}
// The NewLine call tricks ImGui into correctly padding the
// next widget that comes after the progress_bar spinner; this
// is needed to ensure the button is located in the correct place
ImGui::NewLine();
if(!str_button.empty()) {
ImGui::Dummy(ImVec2(0.0f, 32.0f * globals::gui_scale));
const float button_width = 0.8f * ImGui::CalcItemWidth();
ImGui::SetCursorPosX(0.5f * (window_size.x - button_width));
if(ImGui::Button(str_button.c_str(), ImVec2(button_width, 0.0f))) {
if(button_action) {
button_action();
}
}
}
ImGui::PopStyleVar();
}
ImGui::End();
}
void gui::progress_bar::reset(void)
{
str_title.clear();
str_button.clear();
button_action = nullptr;
}
void gui::progress_bar::set_title(std::string_view title)
{
str_title = gui::language::resolve(title);
}
void gui::progress_bar::set_button(std::string_view text, const progress_bar_action& action)
{
str_button = std::format("{}###ProgressBar_Button", gui::language::resolve(text));
button_action = action;
}
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