logmeow/event_loop.cpp

#include <imgui.h>
#include <imgui_stdlib.h>

#include "config.h"

static inline void settings_window(Config& inactive_config, bool* show_settings_window) {
    if (!ImGui::Begin("Settings", show_settings_window)) {
        ImGui::End();
        return;
    }
    ImGui::Text("Modifying logcat command will take effect after closing this window and will restart logcat");
    ImGui::InputTextWithHint("Logcat command", "adb logcat -Dv 'threadtime UTC epoch usec'", &inactive_config.logcat_command);
    ImGui::End();
}

static inline void main_window(Config& active_config, Config& inactive_config, bool* show_demo_window,
        bool* show_settings_window, bool* save_settings_when_settings_window_closed, bool* exit_requested_rev) {
    if (!ImGui::Begin("LogMeow", exit_requested_rev)) {
        ImGui::End();
        return;
    }
    ImGui::Checkbox("Show Dear ImGui Demo Window", show_demo_window);
    if (ImGui::Button("Settings")) {
        if (!*show_settings_window) {
            inactive_config = active_config;
        }
        *show_settings_window = true;
        *save_settings_when_settings_window_closed = true;
    }
    ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
    ImGui::End();
}

static inline void exit_modal_if_necessary(bool* run_event_loop) {
    if (ImGui::BeginPopupModal("Exit?", nullptr, ImGuiWindowFlags_NoResize)) {
        ImGui::Text("Are you sure you want to exit?");

        if (ImGui::Button("Yes", ImVec2(120, 0))) {
            *run_event_loop = false;
        }
        ImGui::SameLine();
        if (ImGui::Button("No", ImVec2(120, 0))) {
            ImGui::CloseCurrentPopup();
        }
        ImGui::SetItemDefaultFocus();
        ImGui::EndPopup();
    }
}

void event_loop(Config& active_config, bool* run_event_loop) {
    static bool show_demo_window = false;
    static bool show_settings_window = false;
    static bool save_settings_when_settings_window_closed = false;
    static bool exit_requested_rev = true;
    static Config inactive_config;

    if (show_demo_window) {
        ImGui::ShowDemoWindow(&show_demo_window);
    }

    if (show_settings_window) {
        settings_window(inactive_config, &show_settings_window);
    } else if (save_settings_when_settings_window_closed) {
        active_config = inactive_config;
        save_settings_when_settings_window_closed = false;
    }

    if (!exit_requested_rev) {
        ImGui::OpenPopup("Exit?");
        exit_requested_rev = true;
    }
    exit_modal_if_necessary(run_event_loop);
    main_window(active_config, inactive_config, &show_demo_window, &show_settings_window, &save_settings_when_settings_window_closed, &exit_requested_rev);
}