org.lwjgl.demo.util.nfd.HelloNFD.java Source code

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Here is the source code for org.lwjgl.demo.util.nfd.HelloNFD.java

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/*
 * Copyright LWJGL. All rights reserved.
 * License terms: https://www.lwjgl.org/license
 */
package org.lwjgl.demo.util.nfd;

import org.lwjgl.*;
import org.lwjgl.glfw.*;
import org.lwjgl.opengl.*;
import org.lwjgl.system.*;
import org.lwjgl.util.nfd.*;

import java.nio.*;
import java.util.*;

import static org.lwjgl.glfw.Callbacks.*;
import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.system.MemoryUtil.*;
import static org.lwjgl.util.nfd.NativeFileDialog.*;

public final class HelloNFD {

    private HelloNFD() {
    }

    public static void main(String[] args) {
        int mod;
        String modDescr;
        if (Platform.get() == Platform.MACOSX) {
            mod = GLFW_MOD_SUPER;
            modDescr = "Cmd";
        } else {
            mod = GLFW_MOD_CONTROL;
            modDescr = "Ctrl";
        }

        GLFWErrorCallback.createPrint().set();
        if (!glfwInit()) {
            throw new IllegalStateException("Unable to initialize GLFW");
        }

        long window = glfwCreateWindow(300, 300, "Hello NativeFileDialog!", NULL, NULL);
        if (window == NULL) {
            throw new RuntimeException("Failed to create the GLFW window");
        }

        glfwSetKeyCallback(window, (windowHnd, key, scancode, action, mods) -> {
            if (action == GLFW_RELEASE) {
                return;
            }

            switch (key) {
            case GLFW_KEY_ESCAPE:
                glfwSetWindowShouldClose(windowHnd, true);
                break;
            case GLFW_KEY_O:
                if ((mods & mod) != 0) {
                    if ((mods & GLFW_MOD_SHIFT) != 0) {
                        openMulti();
                    } else if ((mods & GLFW_MOD_ALT) != 0) {
                        openFolder();
                    } else {
                        openSingle();
                    }
                }
                break;
            case GLFW_KEY_S:
                if ((mods & mod) != 0) {
                    save();
                }
                break;
            }
        });

        // Center window
        GLFWVidMode vidmode = Objects.requireNonNull(glfwGetVideoMode(glfwGetPrimaryMonitor()));
        glfwSetWindowPos(window, (vidmode.width() - 300) / 2, (vidmode.height() - 300) / 2);

        glfwMakeContextCurrent(window);
        GL.createCapabilities();

        glfwSwapInterval(1);

        System.out.println("Press " + modDescr + "+O to launch the single file open dialog.");
        System.out.println("Press " + modDescr + "+Shift+O to launch the multi file open dialog.");
        System.out.println("Press " + modDescr + "+Alt+O to launch the folder select dialog.");
        System.out.println("Press " + modDescr + "+S to launch the file save dialog.");
        while (!glfwWindowShouldClose(window)) {
            glfwPollEvents();

            glClear(GL_COLOR_BUFFER_BIT);
            glfwSwapBuffers(window);
        }

        glfwFreeCallbacks(window);
        glfwDestroyWindow(window);
        glfwTerminate();

        Objects.requireNonNull(glfwSetErrorCallback(null)).free();
    }

    private static void openSingle() {
        PointerBuffer outPath = memAllocPointer(1);

        try {
            checkResult(NFD_OpenDialog("png,jpg;pdf", null, outPath), outPath);
        } finally {
            memFree(outPath);
        }
    }

    private static void openMulti() {
        try (NFDPathSet pathSet = NFDPathSet.calloc()) {
            int result = NFD_OpenDialogMultiple("png,jpg;pdf", null, pathSet);
            switch (result) {
            case NFD_OKAY:
                long count = NFD_PathSet_GetCount(pathSet);
                for (long i = 0; i < count; i++) {
                    String path = NFD_PathSet_GetPath(pathSet, i);
                    System.out.format("Path %d: %s\n", i, path);
                }
                NFD_PathSet_Free(pathSet);
                break;
            case NFD_CANCEL:
                System.out.println("User pressed cancel.");
                break;
            default: // NFD_ERROR
                System.err.format("Error: %s\n", NFD_GetError());
            }
        }
    }

    private static void openFolder() {
        PointerBuffer outPath = memAllocPointer(1);

        try {
            checkResult(NFD_PickFolder((ByteBuffer) null, outPath), outPath);
        } finally {
            memFree(outPath);
        }
    }

    private static void save() {
        PointerBuffer savePath = memAllocPointer(1);

        try {
            checkResult(NFD_SaveDialog("png,jpg;pdf", null, savePath), savePath);
        } finally {
            memFree(savePath);
        }
    }

    private static void checkResult(int result, PointerBuffer path) {
        switch (result) {
        case NFD_OKAY:
            System.out.println("Success!");
            System.out.println(path.getStringUTF8(0));
            nNFD_Free(path.get(0));
            break;
        case NFD_CANCEL:
            System.out.println("User pressed cancel.");
            break;
        default: // NFD_ERROR
            System.err.format("Error: %s\n", NFD_GetError());
        }
    }

}