Issue while trying to Debug (C++ - ImGui + GLFW)

support
1

When I try to debug in Visual Studio 2022 as Release x64, I receive this error:
Obs.: idk where the code is getting the “GLFW.obj” object from

Build started…
1>------ Build started: Project: STReslo_ImGui_GLFW, Configuration: Release x64 ------
1>LINK : fatal error LNK1181: cannot open input file ‘D:\C++\STReslo_ImGui_GLFW\STReslo_ImGui_GLFW\GLFW.obj’
1>Done building project “STReslo_ImGui_GLFW.vcxproj” – FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
========== Elapsed 00:00.177 ==========

Code:

#include <iostream>
#include <fstream>
#include <string>

//ImGui
#include "Imgui/imgui.h"
#include "Imgui/imgui_impl_glfw.h"
#include "Imgui/imgui_impl_opengl3.h"

//GLFW
#include "GLFW/glfw3.h"

const std::string filename = "login_data.json";

void SaveLoginData(const std::string& username, const std::string& password, bool rememberPassword) {
    std::ofstream file(filename);
    if (file.is_open()) {
        file << username << std::endl;
        if (rememberPassword) {
            file << password << std::endl;
        }
        else {
            file << " " << std::endl; // Save an empty line if not remembering password
        }
        file.close();
    }
}

bool LoadLoginData(std::string& username, std::string& password) {
    std::ifstream file(filename);
    if (file.is_open()) {
        std::getline(file, username);
        std::getline(file, password);
        file.close();
        return true;
    }
    return false;
}

int main() {
    // Initialize GLFW and OpenGL context
    glfwInit();
    GLFWwindow* window = glfwCreateWindow(400, 200, "Login Screen", NULL, NULL);
    glfwMakeContextCurrent(window);
    glfwSwapInterval(1);

    // Setup ImGui context
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGuiIO& io = ImGui::GetIO();
    (void)io;
    ImGui::StyleColorsDark();
    ImGui_ImplGlfw_InitForOpenGL(window, true);
    ImGui_ImplOpenGL3_Init("#version 330 core");

    char username[256] = { 0 };
    char password[256] = { 0 };
    bool rememberPassword = false;
    bool loggedIn = false;

    // Load login data if available
    std::string loadedUsername, loadedPassword;
    if (LoadLoginData(loadedUsername, loadedPassword)) {
        rememberPassword = true;
        strncpy_s(username, sizeof(username), loadedUsername.c_str(), _TRUNCATE);
        strncpy_s(password, sizeof(password), loadedPassword.c_str(), _TRUNCATE);
    }

    while (!glfwWindowShouldClose(window)) {
        glfwPollEvents();

        // Start the ImGui frame
        ImGui_ImplOpenGL3_NewFrame();
        ImGui_ImplGlfw_NewFrame();
        ImGui::NewFrame();

        // Create the login window
        ImGui::Begin("Login");

        ImGui::Text("Username:");
        ImGui::InputText("##Username", username, sizeof(username));

        ImGui::Text("Password:");
        if (ImGui::Button("Show Password")) {
            ImGui::InputText("##Password", password, sizeof(password));
        }
        else {
            ImGui::InputText("##Password", password, sizeof(password), ImGuiInputTextFlags_Password);
        }

        ImGui::Checkbox("Remember Password", &rememberPassword);

        if (ImGui::Button("Login")) {
            // Perform login validation here (e.g., check username and password against a database)
            if (strlen(username) > 0 && strlen(password) > 0) {
                SaveLoginData(username, password, rememberPassword);
                loggedIn = true;
            }
        }

        ImGui::End();

        // End the ImGui frame
        ImGui::Render();
        int display_w, display_h;
        glfwGetFramebufferSize(window, &display_w, &display_h);
        glViewport(0, 0, display_w, display_h);
        glClearColor(0.45f, 0.55f, 0.60f, 1.00f);
        glClear(GL_COLOR_BUFFER_BIT);
        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
        glfwSwapBuffers(window);

        if (loggedIn) {
            // Add your logic here for what to do after successful login
            break; // Exit the loop after successful login for this example
        }
    }

    // Cleanup
    ImGui_ImplOpenGL3_Shutdown();
    ImGui_ImplGlfw_Shutdown();
    ImGui::DestroyContext();

    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}
2

Hi @eopascucci,

Welcome to the GLFW forum.

This link error can’t be diagnosed from the information you’ve posted, since it’s caused by something in your Visual Studio 2022 project setup (the solution and project files).

I take it that the file D:\C++\STReslo_ImGui_GLFW\STReslo_ImGui_GLFW\GLFW.obj does not exist?

If so. have you accidentally added GLFW.obj to your STReslo_ImGui_GLFW Project > Properties > Linker > Input > Additional Dependencies instead of the library glfw3.lib? You can view this by right clicking on the STReslo_ImGui_GLFW project in Solution Explorer and selecting Properties which is at the bottom of the list.