Added speaker and power modules

Assets/ControlPanel.cs

@@ -5,38 +5,47 @@ using UnityEngine.UI;
 public class ControlPanel : MonoBehaviour
 {
     [Header("Core UI (assign in Inspector)")]
-    public TMP_InputField inputField;          // was DegreesInputField
+    public TMP_InputField inputField;
-    public TMP_Dropdown directionDropdown;     // was DirectionDropdown
+    public TMP_Dropdown directionDropdown;
-    public Button button;                      // was RotateButton
+    public Button button; // existing Send/Rotate button in hierarchy
 
-    private enum Mode { None, DC, Display }
+    private enum Mode { None, DC, Display, Speaker }
     private Mode _mode = Mode.None;
 
     private DCMotorModule _dc;
     private DisplayModule _display;
+    private SpeakerModule _speaker;
 
-    // Keep separate inputs so they don't interfere
     private string _savedDCInput = "";
     private int _savedDirectionIndex = 0;
     private string _savedDisplayInput = "";
 
-    // Found automatically (no new UI objects)
+    // Found automatically (no hierarchy edits)
-    private TextMeshProUGUI _caption;          // DegreesCaption text
+    private TextMeshProUGUI _caption;     // child "DegreesCaption"
-    private TextMeshProUGUI _buttonText;       // RotateButton/Text (TMP)
+    private TextMeshProUGUI _buttonText;  // child "RotateButton/Text (TMP)"
-    private GameObject _directionCaptionGO;    // DirectionCaption
+    private GameObject _directionCaptionGO;
-    private GameObject _directionDropdownGO;   // DirectionDropdown GameObject
+    private GameObject _directionDropdownGO;
+
+    // Created in code (Speaker mode only)
+    private Button _uploadButton;
+    private TextMeshProUGUI _uploadButtonText;
+    private Button _playButton;
+    private TextMeshProUGUI _playButtonText;
 
     private void Awake()
     {
         CacheUIFromHierarchy();
 
+        // Create these once; hide unless Speaker mode
+        CreateUploadButtonIfNeeded();
+        CreatePlayButtonIfNeeded();
+
         if (button != null)
         {
             button.onClick.RemoveAllListeners();
-            button.onClick.AddListener(OnButtonClicked);
+            button.onClick.AddListener(OnMainButtonClicked);
         }
 
-        // Cache typed values so switching modules restores what you typed
         if (inputField != null)
         {
             inputField.onValueChanged.AddListener(_ => CacheCurrentInput());
@@ -52,29 +61,17 @@ public class ControlPanel : MonoBehaviour
         }
     }
 
-    /// <summary>
-    /// Call this whenever a DC or Display module is selected.
-    /// </summary>
     public void Initialize(ModuleBase module)
     {
         CacheCurrentInput();
 
         _dc = module as DCMotorModule;
         _display = module as DisplayModule;
+        _speaker = module as SpeakerModule;
 
-        if (_dc != null)
+        if (_dc != null) { SwitchMode(Mode.DC); gameObject.SetActive(true); return; }
-        {
+        if (_display != null) { SwitchMode(Mode.Display); gameObject.SetActive(true); return; }
-            SwitchMode(Mode.DC);
+        if (_speaker != null) { SwitchMode(Mode.Speaker); gameObject.SetActive(true); return; }
-            gameObject.SetActive(true);
-            return;
-        }
-
-        if (_display != null)
-        {
-            SwitchMode(Mode.Display);
-            gameObject.SetActive(true);
-            return;
-        }
 
         HidePanel();
     }
@@ -86,11 +83,13 @@ public class ControlPanel : MonoBehaviour
         _mode = Mode.None;
         _dc = null;
         _display = null;
+        _speaker = null;
+        SetUploadVisible(false);
+        SetPlayVisible(false);
     }
 
     private void CacheUIFromHierarchy()
     {
-        // Assumes this script is on the parent that contains these children
         var captionT = transform.Find("DegreesCaption");
         if (captionT != null) _caption = captionT.GetComponent<TextMeshProUGUI>();
 
@@ -111,31 +110,65 @@ public class ControlPanel : MonoBehaviour
 
         if (_mode == Mode.DC)
         {
-            if (_caption != null) _caption.text = "Degrees";
+            SetCaption("Degrees");
-            if (_buttonText != null) _buttonText.text = "Rotate";
+            SetCaptionVisible(true);
+            SetMainButtonText("Rotate");
             SetDirectionVisible(true);
+            SetInputVisible(true);
+            SetUploadVisible(false);
+            SetPlayVisible(false);
 
             if (inputField != null)
+            {
+                inputField.readOnly = false;
                 inputField.SetTextWithoutNotify(_savedDCInput);
+            }
 
             if (directionDropdown != null)
                 directionDropdown.SetValueWithoutNotify(_savedDirectionIndex);
         }
         else if (_mode == Mode.Display)
         {
-            if (_caption != null) _caption.text = "Text";
+            SetCaption("Text");
-            if (_buttonText != null) _buttonText.text = "Send";
+            SetCaptionVisible(true);
+            SetMainButtonText("Send");
             SetDirectionVisible(false);
+            SetInputVisible(true);
+            SetUploadVisible(false);
+            SetPlayVisible(false);
 
-            // Prefer module's current displayText; fallback to last typed text
+            if (inputField != null)
+            {
+                inputField.readOnly = false;
                 string toShow = _savedDisplayInput;
                 if (_display != null && !string.IsNullOrEmpty(_display.displayText))
                     toShow = _display.displayText;
-
-            if (inputField != null)
                 inputField.SetTextWithoutNotify(toShow);
             }
         }
+        else if (_mode == Mode.Speaker)
+        {
+            // Speaker UI: no input field (removes the white box behind buttons)
+            SetMainButtonText("Send Audio");
+            SetCaptionVisible(false);
+            SetDirectionVisible(false);
+            SetInputVisible(false);
+
+            // Show speaker buttons
+            SetUploadVisible(true);
+            SetPlayVisible(true);
+        }
+    }
+
+    private void SetCaption(string text)
+    {
+        if (_caption != null) _caption.text = text;
+    }
+
+    private void SetMainButtonText(string text)
+    {
+        if (_buttonText != null) _buttonText.text = text;
+    }
 
     private void SetDirectionVisible(bool visible)
     {
@@ -143,6 +176,12 @@ public class ControlPanel : MonoBehaviour
         if (_directionDropdownGO != null) _directionDropdownGO.SetActive(visible);
     }
 
+    private void SetInputVisible(bool visible)
+    {
+        if (inputField != null && inputField.gameObject.activeSelf != visible)
+            inputField.gameObject.SetActive(visible);
+    }
+
     private void CacheCurrentInput()
     {
         if (inputField == null) return;
@@ -150,8 +189,7 @@ public class ControlPanel : MonoBehaviour
         if (_mode == Mode.DC)
         {
             _savedDCInput = inputField.text;
-            if (directionDropdown != null)
+            if (directionDropdown != null) _savedDirectionIndex = directionDropdown.value;
-                _savedDirectionIndex = directionDropdown.value;
         }
         else if (_mode == Mode.Display)
         {
@@ -159,15 +197,11 @@ public class ControlPanel : MonoBehaviour
         }
     }
 
-    private void OnButtonClicked()
+    private void OnMainButtonClicked()
     {
         if (_mode == Mode.DC)
         {
-            if (_dc == null)
+            if (_dc == null) return;
-            {
-                Debug.LogWarning("ControlPanel: No DC module selected.");
-                return;
-            }
 
             if (!float.TryParse(inputField.text, out float degrees))
             {
@@ -180,14 +214,206 @@ public class ControlPanel : MonoBehaviour
         }
         else if (_mode == Mode.Display)
         {
-            if (_display == null)
+            if (_display == null) return;
+            _display.SetDisplayText(inputField != null ? inputField.text : "");
+        }
+        else if (_mode == Mode.Speaker)
         {
-                Debug.LogWarning("ControlPanel: No Display module selected.");
+            if (_speaker == null) return;
-                return;
+            _speaker.SendAudioToHardware(); // Send Audio = upload to hardware (your implementation)
+        }
     }
 
-            string text = inputField != null ? inputField.text : "";
+    // -------------------------
-            _display.SetDisplayText(text); // <- THIS is where Display module gets the text
+    // Styling helpers (copy Send button look)
+    // -------------------------
+
+    private void CopyButtonStyle(Button source, Button target)
+    {
+        if (source == null || target == null) return;
+
+        // Button settings
+        target.transition = source.transition;
+        target.colors = source.colors;
+        target.spriteState = source.spriteState;
+        target.navigation = source.navigation;
+        target.interactable = source.interactable;
+
+        // Image settings
+        var srcImg = source.GetComponent<Image>();
+        var dstImg = target.GetComponent<Image>();
+        if (srcImg != null && dstImg != null)
+        {
+            dstImg.sprite = srcImg.sprite;
+            dstImg.type = srcImg.type;
+            dstImg.pixelsPerUnitMultiplier = srcImg.pixelsPerUnitMultiplier;
+            dstImg.material = srcImg.material;
+            dstImg.color = srcImg.color;
+            dstImg.raycastTarget = srcImg.raycastTarget;
         }
     }
+
+    private void CopyTMPStyle(TextMeshProUGUI source, TextMeshProUGUI target)
+    {
+        if (source == null || target == null) return;
+
+        target.font = source.font;
+        target.fontSharedMaterial = source.fontSharedMaterial;
+        target.fontStyle = source.fontStyle;
+        target.fontSize = source.fontSize;
+        target.enableAutoSizing = source.enableAutoSizing;
+        target.color = source.color;
+        target.enableVertexGradient = source.enableVertexGradient;
+        target.alignment = source.alignment;
+        target.enableWordWrapping = source.enableWordWrapping;
+        target.richText = source.richText;
+    }
+
+    // -------------------------
+    // Upload button (code-created)
+    // -------------------------
+
+    private void CreateUploadButtonIfNeeded()
+    {
+        if (_uploadButton != null) return;
+
+        var go = new GameObject("UploadButton");
+        go.transform.SetParent(transform, false);
+
+        var img = go.AddComponent<Image>();
+        img.raycastTarget = true;
+
+        _uploadButton = go.AddComponent<Button>();
+        _uploadButton.onClick.AddListener(OnUploadClicked);
+
+        // Copy Send button look
+        CopyButtonStyle(button, _uploadButton);
+
+        var textGo = new GameObject("Text (TMP)");
+        textGo.transform.SetParent(go.transform, false);
+        _uploadButtonText = textGo.AddComponent<TextMeshProUGUI>();
+        _uploadButtonText.text = "Upload Audio";
+
+        // Copy Send text look
+        CopyTMPStyle(_buttonText, _uploadButtonText);
+        _uploadButtonText.alignment = TextAlignmentOptions.Center;
+
+        // Layout: above Play
+        var rt = go.GetComponent<RectTransform>();
+        rt.anchorMin = new Vector2(0.5f, 0f);
+        rt.anchorMax = new Vector2(0.5f, 0f);
+        rt.pivot = new Vector2(0.5f, 0f);
+        rt.sizeDelta = button != null ? button.GetComponent<RectTransform>().sizeDelta : new Vector2(180f, 40f);
+        rt.anchoredPosition = new Vector2(0f, 110f);
+
+        var trt = textGo.GetComponent<RectTransform>();
+        trt.anchorMin = Vector2.zero;
+        trt.anchorMax = Vector2.one;
+        trt.offsetMin = Vector2.zero;
+        trt.offsetMax = Vector2.zero;
+
+        go.SetActive(false);
+    }
+
+    private void SetUploadVisible(bool visible)
+    {
+        if (_uploadButton != null && _uploadButton.gameObject.activeSelf != visible)
+            _uploadButton.gameObject.SetActive(visible);
+    }
+
+    private void OnUploadClicked()
+    {
+        if (_speaker == null) return;
+
+        string path = OpenAudioFilePicker();
+        if (string.IsNullOrEmpty(path)) return;
+
+        _speaker.SetAudioFile(path);
+        // If you want to display filename somewhere without the input field,
+        // we can put it in the caption temporarily or add a TMP label in code.
+    }
+
+    // -------------------------
+    // Play button (code-created)
+    // -------------------------
+
+    private void CreatePlayButtonIfNeeded()
+    {
+        if (_playButton != null) return;
+
+        var go = new GameObject("PlayButton");
+        go.transform.SetParent(transform, false);
+
+        var img = go.AddComponent<Image>();
+        img.raycastTarget = true;
+
+        _playButton = go.AddComponent<Button>();
+        _playButton.onClick.AddListener(OnPlayClicked);
+
+        // Copy Send button look
+        CopyButtonStyle(button, _playButton);
+
+        var textGo = new GameObject("Text (TMP)");
+        textGo.transform.SetParent(go.transform, false);
+        _playButtonText = textGo.AddComponent<TextMeshProUGUI>();
+        _playButtonText.text = "Play Audio";
+
+        // Copy Send text look
+        CopyTMPStyle(_buttonText, _playButtonText);
+        _playButtonText.alignment = TextAlignmentOptions.Center;
+
+        // Layout: between Upload and Send
+        var rt = go.GetComponent<RectTransform>();
+        rt.anchorMin = new Vector2(0.5f, 0f);
+        rt.anchorMax = new Vector2(0.5f, 0f);
+        rt.pivot = new Vector2(0.5f, 0f);
+        rt.sizeDelta = button != null ? button.GetComponent<RectTransform>().sizeDelta : new Vector2(180f, 40f);
+        rt.anchoredPosition = new Vector2(0f, 60f);
+
+        var trt = textGo.GetComponent<RectTransform>();
+        trt.anchorMin = Vector2.zero;
+        trt.anchorMax = Vector2.one;
+        trt.offsetMin = Vector2.zero;
+        trt.offsetMax = Vector2.zero;
+
+        go.SetActive(false);
+    }
+
+    private void SetPlayVisible(bool visible)
+    {
+        if (_playButton != null && _playButton.gameObject.activeSelf != visible)
+            _playButton.gameObject.SetActive(visible);
+    }
+
+    private void OnPlayClicked()
+    {
+        if (_speaker == null) return;
+        _speaker.PlayAudioOnHardware();
+    }
+
+    // -------------------------
+    // File Picker (Editor + builds via SFB)
+    // -------------------------
+
+    private string OpenAudioFilePicker()
+    {
+#if UNITY_EDITOR
+        return UnityEditor.EditorUtility.OpenFilePanel("Select audio file", "", "wav,mp3,ogg");
+#else
+        var extensions = new[]
+        {
+            new SFB.ExtensionFilter("Audio Files", "wav", "mp3", "ogg"),
+            new SFB.ExtensionFilter("All Files", "*")
+        };
+
+        string[] paths = SFB.StandaloneFileBrowser.OpenFilePanel("Select audio file", "", extensions, false);
+        return (paths != null && paths.Length > 0) ? paths[0] : "";
+#endif
+    }
+
+    private void SetCaptionVisible(bool visible)
+    {
+        if (_caption != null && _caption.gameObject.activeSelf != visible)
+            _caption.gameObject.SetActive(visible);
+    }
 }

Assets/IK/InverseKinematicsController.cs

@@ -272,7 +272,7 @@ public class InverseKinematicsController : MonoBehaviour
             ModuleBase module = child.GetComponent<ModuleBase>();
             if (module != null)
             {
-                BatteryModule battery = child.GetComponent<BatteryModule>();
+                PowerModule battery = child.GetComponent<PowerModule>();
                 HubModule hub = child.GetComponent<HubModule>();
                 
                 if (battery != null || hub != null)

Assets/LiveViewModulePanel.cs

@@ -23,7 +23,6 @@ public class LiveViewModulePanel : MonoBehaviour
 
     private bool _sliderDragging;
     private ControlPanel panel;
-    private ModuleBase _lastSelected;
     private GameObject sensorTextContainer;
     private readonly System.Collections.Generic.List<TextMeshProUGUI> sensorTextLines = new System.Collections.Generic.List<TextMeshProUGUI>();
 
@@ -67,7 +66,6 @@ public class LiveViewModulePanel : MonoBehaviour
 
         if (selected == null)
         {
-            _lastSelected = null;
             SetModuleInfo("No module selected");
             SetServoSectionActive(false);
             SetModuleControlSectionActive(false);
@@ -85,6 +83,7 @@ public class LiveViewModulePanel : MonoBehaviour
         var display = selected as DisplayModule;
         var distance = selected as DistanceSensorModule;
         var imu = selected as IMUSensorModule;
+        var speaker = selected as SpeakerModule;
 
         if (servo != null)
         {
@@ -119,18 +118,12 @@ public class LiveViewModulePanel : MonoBehaviour
         }
 
         // DC or Display both use the same control section
-        if (dc != null || display != null)
+        if (dc != null || display != null || speaker != null)
         {
             SetServoSectionActive(false);
             SetModuleControlSectionActive(true);
-            SetSensorTextActive(false);
 
-            if (selected != _lastSelected)
-            {
-                _lastSelected = selected;
             panel?.Initialize(selected);
-            }
-
             return;
         }
 
@@ -257,11 +250,12 @@ public class LiveViewModulePanel : MonoBehaviour
         if (m is DCMotorModule) return "DC";
         if (m is DisplayModule) return "Display";
         if (m is HubModule) return "Hub";
-        if (m is BatteryModule) return "Battery";
+        if (m is PowerModule) return "Power";
         if (m is GripperModule) return "Gripper";
         if (m is DisplayModule) return "Display";
         if (m is DistanceSensorModule) return "Distance Sensor";
         if (m is IMUSensorModule) return "IMU Sensor";
+        if (m is SpeakerModule) return "Speaker";
         return m.GetType().Name;
     }
 

Assets/Module/PowerModule.prefab

@@ -0,0 +1,223 @@
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Assets/Module/TopologyBuilder.cs

@@ -118,6 +118,7 @@ public class TopologyBuilder : MonoBehaviour
             case "Display": return ModuleType.DISPLAY;
             case "Distance": return ModuleType.DISTANCE_SENSOR;
             case "IMU": return ModuleType.IMU;
+            case "Speaker": return ModuleType.SPEAKER;
             default: return ModuleType.SPLITTER;
         }
     }

Assets/Module/battery_module_mf_unity.prefab

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Assets/ModuleSpawner.cs

@@ -13,6 +13,7 @@ public class ModuleSpawner : MonoBehaviour
     public GameObject displayModulePrefab;
     public GameObject distanceSensorModulePrefab;
     public GameObject imuSensorModulePrefab;
+    public GameObject speakerModulePrefab;
 
     public GameObject GetPrefabForType(ModuleType type)
     {
@@ -37,6 +38,8 @@ public class ModuleSpawner : MonoBehaviour
                 return distanceSensorModulePrefab;
             case ModuleType.IMU:
                 return imuSensorModulePrefab;
+            case ModuleType.SPEAKER:
+                return speakerModulePrefab;
             default:
                 Debug.LogError("Unknown module type: " + type);
                 return null;

Assets/PowerModule.cs

@@ -2,6 +2,6 @@ using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
-public class BatteryModule : ModuleBase
+public class PowerModule : ModuleBase
 {
 }

Assets/PowerModule.cs.meta

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Assets/Resources/mockDataSimple.json

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+{"Modules":[{"Id":"battery1","Type":"Battery","Degree":null},{"Id":"servo1","Type":"Servo1","Degree":45},{"Id":"servo2","Type":"Servo2","Degree":60},{"Id":"servo3","Type":"Servo1","Degree":90},{"Id":"servo4","Type":"Servo2","Degree":0},{"Id":"endModule","Type":"Speaker","Degree":null}],"Connections":[{"FromModuleId":"battery1","ToModuleId":"servo1","FromSocket":"MaleSocket","ToSocket":"BodySocket","Orientation":0},{"FromModuleId":"servo1","ToModuleId":"servo2","FromSocket":"MaleSocket","ToSocket":"FemaleSocket","Orientation":90},{"FromModuleId":"servo2","ToModuleId":"servo3","FromSocket":"MaleSocket","ToSocket":"FemaleSocket","Orientation":0},{"FromModuleId":"servo3","ToModuleId":"servo4","FromSocket":"MaleSocket","ToSocket":"FemaleSocket","Orientation":90},{"FromModuleId":"servo4","ToModuleId":"endModule","FromSocket":"MaleSocket","ToSocket":"FemaleSocket","Orientation":0}]}

Assets/Scenes/SampleScene.unity

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   imuSensorModulePrefab: {fileID: 7670757311786442011, guid: 78f1dcd3d1ad14720bec24368d935b13, type: 3}
+  speakerModulePrefab: {fileID: 7364806464279017071, guid: 8bcdcbcb5a03245248cb7f883e80d948, type: 3}
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Assets/SpeakerModule.cs

@@ -0,0 +1,69 @@
+using System;
+using System.IO;
+using UnityEngine;
+
+public class SpeakerModule : ModuleBase
+{
+    [Header("Selected Audio")]
+    public string audioFilePath = "";
+    public string audioFileName = "";
+    public byte[] audioBytes;
+
+    // Called by UI after user picks a file
+    public void SetAudioFile(string path)
+    {
+        if (string.IsNullOrEmpty(path) || !File.Exists(path))
+        {
+            Debug.LogWarning("[SpeakerModule] Invalid audio file path.");
+            ClearAudio();
+            return;
+        }
+
+        audioFilePath = path;
+        audioFileName = Path.GetFileName(path);
+
+        try
+        {
+            audioBytes = File.ReadAllBytes(path);
+            Debug.Log($"[SpeakerModule] Loaded audio file: {audioFileName} ({audioBytes.Length} bytes)");
+        }
+        catch (Exception e)
+        {
+            Debug.LogError($"[SpeakerModule] Failed to read audio file: {e.Message}");
+            ClearAudio();
+        }
+    }
+
+    // Called by UI when user presses the shared Send button
+    public void SendAudioToHardware()
+    {
+        if (audioBytes == null || audioBytes.Length == 0)
+        {
+            Debug.LogWarning("[SpeakerModule] No audio selected to send.");
+            return;
+        }
+
+        // TODO: replace with your real control library call
+        Debug.Log($"[SpeakerModule] Sending audio '{audioFileName}' ({audioBytes.Length} bytes) to hardware");
+
+        // Example:
+        // ControlLibrary.send_speaker_audio(Int32.Parse(moduleID), audioBytes, audioBytes.Length);
+        // or chunk it if your library requires.
+    }
+
+    public void PlayAudioOnHardware()
+    {
+        // TODO: Replace with your real ControlLibrary call
+        // Example:
+        // ControlLibrary.speaker_play(Int32.Parse(moduleID));
+
+        Debug.Log($"[SpeakerModule] Play requested on hardware for '{audioFileName}'.");
+    }
+
+    private void ClearAudio()
+    {
+        audioFilePath = "";
+        audioFileName = "";
+        audioBytes = null;
+    }
+}

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Assets/StandaloneFileBrowser/IStandaloneFileBrowser.cs

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+using System;
+
+namespace SFB {
+    public interface IStandaloneFileBrowser {
+        string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect);
+        string[] OpenFolderPanel(string title, string directory, bool multiselect);
+        string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions);
+
+        void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb);
+        void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb);
+        void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb);
+    }
+}

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Assets/StandaloneFileBrowser/Plugins/StandaloneFileBrowser.bundle/Contents/Info.plist

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+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>StandaloneFileBrowser</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.gkngkc.sfb</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>StandaloneFileBrowser</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0		</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
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+	<array>
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+	</array>
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+	<key>CSResourcesFileMapped</key>
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Assets/StandaloneFileBrowser/Plugins/StandaloneFileBrowser.jslib

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+var StandaloneFileBrowserWebGLPlugin = {
+    // Open file.
+    // gameObjectNamePtr: Unique GameObject name. Required for calling back unity with SendMessage.
+    // methodNamePtr: Callback method name on given GameObject.
+    // filter: Filter files. Example filters:
+    //     Match all image files: "image/*"
+    //     Match all video files: "video/*"
+    //     Match all audio files: "audio/*"
+    //     Custom: ".plist, .xml, .yaml"
+    // multiselect: Allows multiple file selection
+    UploadFile: function(gameObjectNamePtr, methodNamePtr, filterPtr, multiselect) {
+        gameObjectName = Pointer_stringify(gameObjectNamePtr);
+        methodName = Pointer_stringify(methodNamePtr);
+        filter = Pointer_stringify(filterPtr);
+
+        // Delete if element exist
+        var fileInput = document.getElementById(gameObjectName)
+        if (fileInput) {
+            document.body.removeChild(fileInput);
+        }
+
+        fileInput = document.createElement('input');
+        fileInput.setAttribute('id', gameObjectName);
+        fileInput.setAttribute('type', 'file');
+        fileInput.setAttribute('style','display:none;');
+        fileInput.setAttribute('style','visibility:hidden;');
+        if (multiselect) {
+            fileInput.setAttribute('multiple', '');
+        }
+        if (filter) {
+            fileInput.setAttribute('accept', filter);
+        }
+        fileInput.onclick = function (event) {
+            // File dialog opened
+            this.value = null;
+        };
+        fileInput.onchange = function (event) {
+            // multiselect works
+            var urls = [];
+            for (var i = 0; i < event.target.files.length; i++) {
+                urls.push(URL.createObjectURL(event.target.files[i]));
+            }
+            // File selected
+            SendMessage(gameObjectName, methodName, urls.join());
+
+            // Remove after file selected
+            document.body.removeChild(fileInput);
+        }
+        document.body.appendChild(fileInput);
+
+        document.onmouseup = function() {
+            fileInput.click();
+            document.onmouseup = null;
+        }
+    },
+
+    // Save file
+    // DownloadFile method does not open SaveFileDialog like standalone builds, its just allows user to download file
+    // gameObjectNamePtr: Unique GameObject name. Required for calling back unity with SendMessage.
+    // methodNamePtr: Callback method name on given GameObject.
+    // filenamePtr: Filename with extension
+    // byteArray: byte[]
+    // byteArraySize: byte[].Length
+    DownloadFile: function(gameObjectNamePtr, methodNamePtr, filenamePtr, byteArray, byteArraySize) {
+        gameObjectName = Pointer_stringify(gameObjectNamePtr);
+        methodName = Pointer_stringify(methodNamePtr);
+        filename = Pointer_stringify(filenamePtr);
+
+        var bytes = new Uint8Array(byteArraySize);
+        for (var i = 0; i < byteArraySize; i++) {
+            bytes[i] = HEAPU8[byteArray + i];
+        }
+
+        var downloader = window.document.createElement('a');
+        downloader.setAttribute('id', gameObjectName);
+        downloader.href = window.URL.createObjectURL(new Blob([bytes], { type: 'application/octet-stream' }));
+        downloader.download = filename;
+        document.body.appendChild(downloader);
+
+        document.onmouseup = function() {
+            downloader.click();
+            document.body.removeChild(downloader);
+        	document.onmouseup = null;
+
+            SendMessage(gameObjectName, methodName);
+        }
+    }
+};
+
+mergeInto(LibraryManager.library, StandaloneFileBrowserWebGLPlugin);

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Assets/StandaloneFileBrowser/Sample/BasicSample.cs

@@ -0,0 +1,119 @@
+using System.Collections;
+using UnityEngine;
+using SFB;
+
+public class BasicSample : MonoBehaviour {
+    private string _path;
+
+    void OnGUI() {
+        var guiScale = new Vector3(Screen.width / 800.0f, Screen.height / 600.0f, 1.0f);
+        GUI.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, guiScale);
+
+        GUILayout.Space(20);
+        GUILayout.BeginHorizontal();
+        GUILayout.Space(20);
+        GUILayout.BeginVertical();
+
+        // Open File Samples
+
+        if (GUILayout.Button("Open File")) {
+            WriteResult(StandaloneFileBrowser.OpenFilePanel("Open File", "", "", false));
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open File Async")) {
+            StandaloneFileBrowser.OpenFilePanelAsync("Open File", "", "", false, (string[] paths) => { WriteResult(paths); });
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open File Multiple")) {
+            WriteResult(StandaloneFileBrowser.OpenFilePanel("Open File", "", "", true));
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open File Extension")) {
+            WriteResult(StandaloneFileBrowser.OpenFilePanel("Open File", "", "txt", true));
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open File Directory")) {
+            WriteResult(StandaloneFileBrowser.OpenFilePanel("Open File", Application.dataPath, "", true));
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open File Filter")) {
+            var extensions = new [] {
+                new ExtensionFilter("Image Files", "png", "jpg", "jpeg" ),
+                new ExtensionFilter("Sound Files", "mp3", "wav" ),
+                new ExtensionFilter("All Files", "*" ),
+            };
+            WriteResult(StandaloneFileBrowser.OpenFilePanel("Open File", "", extensions, true));
+        }
+
+        GUILayout.Space(15);
+
+        // Open Folder Samples
+
+        if (GUILayout.Button("Open Folder")) {
+            var paths = StandaloneFileBrowser.OpenFolderPanel("Select Folder", "", true);
+            WriteResult(paths);
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open Folder Async")) {
+            StandaloneFileBrowser.OpenFolderPanelAsync("Select Folder", "", true, (string[] paths) => { WriteResult(paths); });
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Open Folder Directory")) {
+            var paths = StandaloneFileBrowser.OpenFolderPanel("Select Folder", Application.dataPath, true);
+            WriteResult(paths);
+        }
+
+        GUILayout.Space(15);
+
+        // Save File Samples
+
+        if (GUILayout.Button("Save File")) {
+            _path = StandaloneFileBrowser.SaveFilePanel("Save File", "", "", "");
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Save File Async")) {
+            StandaloneFileBrowser.SaveFilePanelAsync("Save File", "", "", "", (string path) => { WriteResult(path); });
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Save File Default Name")) {
+            _path = StandaloneFileBrowser.SaveFilePanel("Save File", "", "MySaveFile", "");
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Save File Default Name Ext")) {
+            _path = StandaloneFileBrowser.SaveFilePanel("Save File", "", "MySaveFile", "dat");
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Save File Directory")) {
+            _path = StandaloneFileBrowser.SaveFilePanel("Save File", Application.dataPath, "", "");
+        }
+        GUILayout.Space(5);
+        if (GUILayout.Button("Save File Filter")) {
+            // Multiple save extension filters with more than one extension support.
+            var extensionList = new [] {
+                new ExtensionFilter("Binary", "bin"),
+                new ExtensionFilter("Text", "txt"),
+            };
+            _path = StandaloneFileBrowser.SaveFilePanel("Save File", "", "MySaveFile", extensionList);
+        }
+
+        GUILayout.EndVertical();
+        GUILayout.Space(20);
+        GUILayout.Label(_path);
+        GUILayout.EndHorizontal();
+    }
+
+    public void WriteResult(string[] paths) {
+        if (paths.Length == 0) {
+            return;
+        }
+
+        _path = "";
+        foreach (var p in paths) {
+            _path += p + "\n";
+        }
+    }
+
+    public void WriteResult(string path) {
+        _path = path;
+    }
+}

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Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileImage.cs

@@ -0,0 +1,53 @@
+using System.Text;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using SFB;
+
+[RequireComponent(typeof(Button))]
+public class CanvasSampleOpenFileImage : MonoBehaviour, IPointerDownHandler {
+    public RawImage output;
+
+#if UNITY_WEBGL && !UNITY_EDITOR
+    //
+    // WebGL
+    //
+    [DllImport("__Internal")]
+    private static extern void UploadFile(string gameObjectName, string methodName, string filter, bool multiple);
+
+    public void OnPointerDown(PointerEventData eventData) {
+        UploadFile(gameObject.name, "OnFileUpload", ".png, .jpg", false);
+    }
+
+    // Called from browser
+    public void OnFileUpload(string url) {
+        StartCoroutine(OutputRoutine(url));
+    }
+#else
+    //
+    // Standalone platforms & editor
+    //
+    public void OnPointerDown(PointerEventData eventData) { }
+
+    void Start() {
+        var button = GetComponent<Button>();
+        button.onClick.AddListener(OnClick);
+    }
+
+    private void OnClick() {
+        var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", ".png", false);
+        if (paths.Length > 0) {
+            StartCoroutine(OutputRoutine(new System.Uri(paths[0]).AbsoluteUri));
+        }
+    }
+#endif
+
+    private IEnumerator OutputRoutine(string url) {
+        var loader = new WWW(url);
+        yield return loader;
+        output.texture = loader.texture;
+    }
+}

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Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileText.cs

@@ -0,0 +1,53 @@
+using System.Text;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using SFB;
+
+[RequireComponent(typeof(Button))]
+public class CanvasSampleOpenFileText : MonoBehaviour, IPointerDownHandler {
+    public Text output;
+
+#if UNITY_WEBGL && !UNITY_EDITOR
+    //
+    // WebGL
+    //
+    [DllImport("__Internal")]
+    private static extern void UploadFile(string gameObjectName, string methodName, string filter, bool multiple);
+
+    public void OnPointerDown(PointerEventData eventData) {
+        UploadFile(gameObject.name, "OnFileUpload", ".txt", false);
+    }
+
+    // Called from browser
+    public void OnFileUpload(string url) {
+        StartCoroutine(OutputRoutine(url));
+    }
+#else
+    //
+    // Standalone platforms & editor
+    //
+    public void OnPointerDown(PointerEventData eventData) { }
+
+    void Start() {
+        var button = GetComponent<Button>();
+        button.onClick.AddListener(OnClick);
+    }
+
+    private void OnClick() {
+        var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", "txt", false);
+        if (paths.Length > 0) {
+            StartCoroutine(OutputRoutine(new System.Uri(paths[0]).AbsoluteUri));
+        }
+    }
+#endif
+
+    private IEnumerator OutputRoutine(string url) {
+        var loader = new WWW(url);
+        yield return loader;
+        output.text = loader.text;
+    }
+}

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Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileTextMultiple.cs

@@ -0,0 +1,62 @@
+using System.Text;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using SFB;
+
+[RequireComponent(typeof(Button))]
+public class CanvasSampleOpenFileTextMultiple : MonoBehaviour, IPointerDownHandler {
+    public Text output;
+
+#if UNITY_WEBGL && !UNITY_EDITOR
+    //
+    // WebGL
+    //
+    [DllImport("__Internal")]
+    private static extern void UploadFile(string gameObjectName, string methodName, string filter, bool multiple);
+
+    public void OnPointerDown(PointerEventData eventData) {
+        UploadFile(gameObject.name, "OnFileUpload", ".txt", true);
+    }
+
+    // Called from browser
+    public void OnFileUpload(string urls) {
+        StartCoroutine(OutputRoutine(urls.Split(',')));
+    }
+#else
+    //
+    // Standalone platforms & editor
+    //
+    public void OnPointerDown(PointerEventData eventData) { }
+
+    void Start() {
+        var button = GetComponent<Button>();
+        button.onClick.AddListener(OnClick);
+    }
+
+    private void OnClick() {
+        // var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", "txt", true);
+        var paths = StandaloneFileBrowser.OpenFilePanel("Open File", "", "", true);
+        if (paths.Length > 0) {
+            var urlArr = new List<string>(paths.Length);
+            for (int i = 0; i < paths.Length; i++) {
+                urlArr.Add(new System.Uri(paths[i]).AbsoluteUri);
+            }
+            StartCoroutine(OutputRoutine(urlArr.ToArray()));
+        }
+    }
+#endif
+
+    private IEnumerator OutputRoutine(string[] urlArr) {
+        var outputText = "";
+        for (int i = 0; i < urlArr.Length; i++) {
+            var loader = new WWW(urlArr[i]);
+            yield return loader;
+            outputText += loader.text;
+        }
+        output.text = outputText;
+    }
+}

Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileTextMultiple.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: f0d44e50b94d44bf6b87f9db5a07981c
+guid: 71c09849449d61e47a4599e06b964998
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/StandaloneFileBrowser/Sample/CanvasSampleSaveFileImage.cs

@@ -0,0 +1,65 @@
+using System.IO;
+using System.Text;
+using System.Runtime.InteropServices;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using SFB;
+
+[RequireComponent(typeof(Button))]
+public class CanvasSampleSaveFileImage : MonoBehaviour, IPointerDownHandler {
+    public Text output;
+
+    private byte[] _textureBytes;
+
+    void Awake() {
+        // Create red texture
+        var width = 100;
+        var height = 100;
+        Texture2D tex = new Texture2D(width, height, TextureFormat.RGB24, false);
+        for (int i = 0; i < width; i++) {
+            for (int j = 0; j < height; j++) {
+                tex.SetPixel(i, j, Color.red);
+            }
+        }
+        tex.Apply();
+        _textureBytes = tex.EncodeToPNG();
+        UnityEngine.Object.Destroy(tex);
+    }
+
+#if UNITY_WEBGL && !UNITY_EDITOR
+    //
+    // WebGL
+    //
+    [DllImport("__Internal")]
+    private static extern void DownloadFile(string gameObjectName, string methodName, string filename, byte[] byteArray, int byteArraySize);
+
+    // Broser plugin should be called in OnPointerDown.
+    public void OnPointerDown(PointerEventData eventData) {
+        DownloadFile(gameObject.name, "OnFileDownload", "sample.png", _textureBytes, _textureBytes.Length);
+    }
+
+    // Called from browser
+    public void OnFileDownload() {
+        output.text = "File Successfully Downloaded";
+    }
+#else
+    //
+    // Standalone platforms & editor
+    //
+    public void OnPointerDown(PointerEventData eventData) { }
+
+    // Listen OnClick event in standlone builds
+    void Start() {
+        var button = GetComponent<Button>();
+        button.onClick.AddListener(OnClick);
+    }
+
+    public void OnClick() {
+        var path = StandaloneFileBrowser.SaveFilePanel("Title", "", "sample", "png");
+        if (!string.IsNullOrEmpty(path)) {
+            File.WriteAllBytes(path, _textureBytes);
+        }
+    }
+#endif
+}

Assets/StandaloneFileBrowser/Sample/CanvasSampleSaveFileImage.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 6e681018aa67241a69b8447678ec3b4e
+timeCreated: 1489946149
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/StandaloneFileBrowser/Sample/CanvasSampleSaveFileText.cs

@@ -0,0 +1,52 @@
+using System.IO;
+using System.Text;
+using System.Runtime.InteropServices;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using SFB;
+
+[RequireComponent(typeof(Button))]
+public class CanvasSampleSaveFileText : MonoBehaviour, IPointerDownHandler {
+    public Text output;
+
+    // Sample text data
+    private string _data = "Example text created by StandaloneFileBrowser";
+
+#if UNITY_WEBGL && !UNITY_EDITOR
+    //
+    // WebGL
+    //
+    [DllImport("__Internal")]
+    private static extern void DownloadFile(string gameObjectName, string methodName, string filename, byte[] byteArray, int byteArraySize);
+
+    // Broser plugin should be called in OnPointerDown.
+    public void OnPointerDown(PointerEventData eventData) {
+        var bytes = Encoding.UTF8.GetBytes(_data);
+        DownloadFile(gameObject.name, "OnFileDownload", "sample.txt", bytes, bytes.Length);
+    }
+
+    // Called from browser
+    public void OnFileDownload() {
+        output.text = "File Successfully Downloaded";
+    }
+#else
+    //
+    // Standalone platforms & editor
+    //
+    public void OnPointerDown(PointerEventData eventData) { }
+
+    // Listen OnClick event in standlone builds
+    void Start() {
+        var button = GetComponent<Button>();
+        button.onClick.AddListener(OnClick);
+    }
+
+    public void OnClick() {
+        var path = StandaloneFileBrowser.SaveFilePanel("Title", "", "sample", "txt");
+        if (!string.IsNullOrEmpty(path)) {
+            File.WriteAllText(path, _data);
+        }
+    }
+#endif
+}

Assets/StandaloneFileBrowser/Sample/CanvasSampleSaveFileText.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 8e97f52f0bd664ee78305dae0094a755
+timeCreated: 1489946149
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/StandaloneFileBrowser/Sample/CanvasSampleScene.unity.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: c0e4eec5741834194a946535d535405c
+timeCreated: 1483902786
+licenseType: Pro
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/StandaloneFileBrowser/StandaloneFileBrowser.cs

@@ -0,0 +1,153 @@
+using System;
+
+namespace SFB {
+    public struct ExtensionFilter {
+        public string Name;
+        public string[] Extensions;
+
+        public ExtensionFilter(string filterName, params string[] filterExtensions) {
+            Name = filterName;
+            Extensions = filterExtensions;
+        }
+    }
+
+    public class StandaloneFileBrowser {
+        private static IStandaloneFileBrowser _platformWrapper = null;
+
+        static StandaloneFileBrowser() {
+#if UNITY_STANDALONE_OSX
+            _platformWrapper = new StandaloneFileBrowserMac();
+#elif UNITY_STANDALONE_WIN
+            _platformWrapper = new StandaloneFileBrowserWindows();
+#elif UNITY_STANDALONE_LINUX
+            _platformWrapper = new StandaloneFileBrowserLinux();
+#elif UNITY_EDITOR
+            _platformWrapper = new StandaloneFileBrowserEditor();
+#endif
+        }
+
+        /// <summary>
+        /// Native open file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extension">Allowed extension</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <returns>Returns array of chosen paths. Zero length array when cancelled</returns>
+        public static string[] OpenFilePanel(string title, string directory, string extension, bool multiselect) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            return OpenFilePanel(title, directory, extensions, multiselect);
+        }
+
+        /// <summary>
+        /// Native open file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <returns>Returns array of chosen paths. Zero length array when cancelled</returns>
+        public static string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            return _platformWrapper.OpenFilePanel(title, directory, extensions, multiselect);
+        }
+
+        /// <summary>
+        /// Native open file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extension">Allowed extension</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <param name="cb">Callback")</param>
+        public static void OpenFilePanelAsync(string title, string directory, string extension, bool multiselect, Action<string[]> cb) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            OpenFilePanelAsync(title, directory, extensions, multiselect, cb);
+        }
+
+        /// <summary>
+        /// Native open file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <param name="cb">Callback")</param>
+        public static void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            _platformWrapper.OpenFilePanelAsync(title, directory, extensions, multiselect, cb);
+        }
+
+        /// <summary>
+        /// Native open folder dialog
+        /// NOTE: Multiple folder selection doesn't supported on Windows
+        /// </summary>
+        /// <param name="title"></param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="multiselect"></param>
+        /// <returns>Returns array of chosen paths. Zero length array when cancelled</returns>
+        public static string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            return _platformWrapper.OpenFolderPanel(title, directory, multiselect);
+        }
+
+        /// <summary>
+        /// Native open folder dialog async
+        /// NOTE: Multiple folder selection doesn't supported on Windows
+        /// </summary>
+        /// <param name="title"></param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="multiselect"></param>
+        /// <param name="cb">Callback")</param>
+        public static void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            _platformWrapper.OpenFolderPanelAsync(title, directory, multiselect, cb);
+        }
+
+        /// <summary>
+        /// Native save file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extension">File extension</param>
+        /// <returns>Returns chosen path. Empty string when cancelled</returns>
+        public static string SaveFilePanel(string title, string directory, string defaultName , string extension) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            return SaveFilePanel(title, directory, defaultName, extensions);
+        }
+
+        /// <summary>
+        /// Native save file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <returns>Returns chosen path. Empty string when cancelled</returns>
+        public static string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            return _platformWrapper.SaveFilePanel(title, directory, defaultName, extensions);
+        }
+
+        /// <summary>
+        /// Native save file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extension">File extension</param>
+        /// <param name="cb">Callback")</param>
+        public static void SaveFilePanelAsync(string title, string directory, string defaultName , string extension, Action<string> cb) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            SaveFilePanelAsync(title, directory, defaultName, extensions, cb);
+        }
+
+        /// <summary>
+        /// Native save file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <param name="cb">Callback")</param>
+        public static void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            _platformWrapper.SaveFilePanelAsync(title, directory, defaultName, extensions, cb);
+        }
+    }
+}

Assets/StandaloneFileBrowser/StandaloneFileBrowser.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 3c708be74128e4ced9b79eaaf80e8443
+timeCreated: 1483902788
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/StandaloneFileBrowser/StandaloneFileBrowserEditor.cs

@@ -0,0 +1,56 @@
+#if UNITY_EDITOR
+
+using System;
+using UnityEditor;
+
+namespace SFB {
+    public class StandaloneFileBrowserEditor : IStandaloneFileBrowser  {
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            string path = "";
+
+            if (extensions == null) {
+                path = EditorUtility.OpenFilePanel(title, directory, "");
+            }
+            else {
+                path = EditorUtility.OpenFilePanelWithFilters(title, directory, GetFilterFromFileExtensionList(extensions));
+            }
+
+            return string.IsNullOrEmpty(path) ? new string[0] : new[] { path };
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            cb.Invoke(OpenFilePanel(title, directory, extensions, multiselect));
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var path = EditorUtility.OpenFolderPanel(title, directory, "");
+            return string.IsNullOrEmpty(path) ? new string[0] : new[] {path};
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            cb.Invoke(OpenFolderPanel(title, directory, multiselect));
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            var ext = extensions != null ? extensions[0].Extensions[0] : "";
+            var name = string.IsNullOrEmpty(ext) ? defaultName : defaultName + "." + ext;
+            return EditorUtility.SaveFilePanel(title, directory, name, ext);
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            cb.Invoke(SaveFilePanel(title, directory, defaultName, extensions));
+        }
+
+        // EditorUtility.OpenFilePanelWithFilters extension filter format
+        private static string[] GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            var filters = new string[extensions.Length * 2];
+            for (int i = 0; i < extensions.Length; i++) {
+                filters[(i * 2)] = extensions[i].Name;
+                filters[(i * 2) + 1] = string.Join(",", extensions[i].Extensions);
+            }
+            return filters;
+        }
+    }
+}
+
+#endif

Assets/StandaloneFileBrowser/StandaloneFileBrowserEditor.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 2650af8de2cda46b99b1bc7cf5d30ca5
+timeCreated: 1483902788
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/StandaloneFileBrowser/StandaloneFileBrowserLinux.cs

@@ -0,0 +1,115 @@
+#if UNITY_STANDALONE_LINUX
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using UnityEngine;
+
+namespace SFB {
+
+    public class StandaloneFileBrowserLinux : IStandaloneFileBrowser {
+        
+        private static Action<string[]> _openFileCb;
+        private static Action<string[]> _openFolderCb;
+        private static Action<string> _saveFileCb;
+
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        public delegate void AsyncCallback(string path);
+
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogInit();
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFilePanel(string title, string directory, string extension, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFilePanelAsync(string title, string directory, string extension, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFolderPanel(string title, string directory, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFolderPanelAsync(string title, string directory, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogSaveFilePanel(string title, string directory, string defaultName, string extension);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogSaveFilePanelAsync(string title, string directory, string defaultName, string extension, AsyncCallback callback);
+
+        public StandaloneFileBrowserLinux()
+        {
+            DialogInit();
+        }
+
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFilePanel(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            _openFileCb = cb;
+            DialogOpenFilePanelAsync(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect,
+                (string result) => { _openFileCb.Invoke(result.Split((char)28)); });
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFolderPanel(
+                title,
+                directory,
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            _openFolderCb = cb;
+            DialogOpenFolderPanelAsync(
+                title,
+                directory,
+                multiselect,
+                (string result) => { _openFolderCb.Invoke(result.Split((char)28)); });
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            return Marshal.PtrToStringAnsi(DialogSaveFilePanel(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions)));
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            _saveFileCb = cb;
+            DialogSaveFilePanelAsync(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions),
+                (string result) => { _saveFileCb.Invoke(result); });
+        }
+
+        private static string GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            if (extensions == null) {
+                return "";
+            }
+
+            var filterString = "";
+            foreach (var filter in extensions) {
+                filterString += filter.Name + ";";
+
+                foreach (var ext in filter.Extensions) {
+                    filterString += ext + ",";
+                }
+
+                filterString = filterString.Remove(filterString.Length - 1);
+                filterString += "|";
+            }
+            filterString = filterString.Remove(filterString.Length - 1);
+            return filterString;
+        }
+    }
+}
+
+#endif

Assets/StandaloneFileBrowser/StandaloneFileBrowserLinux.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5d3a668018554b8a89c3fe12de72b60c
+timeCreated: 1538067919

Assets/StandaloneFileBrowser/StandaloneFileBrowserMac.cs

@@ -0,0 +1,119 @@
+#if UNITY_STANDALONE_OSX
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace SFB {
+    public class StandaloneFileBrowserMac : IStandaloneFileBrowser {
+        private static Action<string[]> _openFileCb;
+        private static Action<string[]> _openFolderCb;
+        private static Action<string> _saveFileCb;
+
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        public delegate void AsyncCallback(string path);
+
+        [AOT.MonoPInvokeCallback(typeof(AsyncCallback))]
+        private static void openFileCb(string result) {
+            _openFileCb.Invoke(result.Split((char)28));
+        }
+
+        [AOT.MonoPInvokeCallback(typeof(AsyncCallback))]
+        private static void openFolderCb(string result) {
+            _openFolderCb.Invoke(result.Split((char)28));
+        }
+
+        [AOT.MonoPInvokeCallback(typeof(AsyncCallback))]
+        private static void saveFileCb(string result) {
+            _saveFileCb.Invoke(result);
+        }
+
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFilePanel(string title, string directory, string extension, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFilePanelAsync(string title, string directory, string extension, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFolderPanel(string title, string directory, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFolderPanelAsync(string title, string directory, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogSaveFilePanel(string title, string directory, string defaultName, string extension);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogSaveFilePanelAsync(string title, string directory, string defaultName, string extension, AsyncCallback callback);
+
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFilePanel(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            _openFileCb = cb;
+            DialogOpenFilePanelAsync(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect,
+                openFileCb);
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFolderPanel(
+                title,
+                directory,
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            _openFolderCb = cb;
+            DialogOpenFolderPanelAsync(
+                title,
+                directory,
+                multiselect,
+                openFolderCb);
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            return Marshal.PtrToStringAnsi(DialogSaveFilePanel(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions)));
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            _saveFileCb = cb;
+            DialogSaveFilePanelAsync(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions),
+                saveFileCb);
+        }
+
+        private static string GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            if (extensions == null) {
+                return "";
+            }
+
+            var filterString = "";
+            foreach (var filter in extensions) {
+                filterString += filter.Name + ";";
+
+                foreach (var ext in filter.Extensions) {
+                    filterString += ext + ",";
+                }
+
+                filterString = filterString.Remove(filterString.Length - 1);
+                filterString += "|";
+            }
+            filterString = filterString.Remove(filterString.Length - 1);
+            return filterString;
+        }
+    }
+}
+
+#endif

Assets/StandaloneFileBrowser/StandaloneFileBrowserMac.cs.meta

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+timeCreated: 1483902788
+licenseType: Pro
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+  assetBundleVariant: 

Assets/StandaloneFileBrowser/StandaloneFileBrowserWindows.cs

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+#if UNITY_STANDALONE_WIN
+
+using System;
+using System.IO;
+using System.Windows.Forms;
+using System.Runtime.InteropServices;
+using Ookii.Dialogs;
+
+namespace SFB {
+    // For fullscreen support
+    // - WindowWrapper class and GetActiveWindow() are required for modal file dialog.
+    // - "PlayerSettings/Visible In Background" should be enabled, otherwise when file dialog opened app window minimizes automatically.
+
+    public class WindowWrapper : IWin32Window {
+        private IntPtr _hwnd;
+        public WindowWrapper(IntPtr handle) { _hwnd = handle; }
+        public IntPtr Handle { get { return _hwnd; } }
+    }
+
+    public class StandaloneFileBrowserWindows : IStandaloneFileBrowser {
+        [DllImport("user32.dll")]
+        private static extern IntPtr GetActiveWindow();
+
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            var fd = new VistaOpenFileDialog();
+            fd.Title = title;
+            if (extensions != null) {
+                fd.Filter = GetFilterFromFileExtensionList(extensions);
+                fd.FilterIndex = 1;
+            }
+            else {
+                fd.Filter = string.Empty;
+            }
+            fd.Multiselect = multiselect;
+            if (!string.IsNullOrEmpty(directory)) {
+                fd.FileName = GetDirectoryPath(directory);
+            }
+            var res = fd.ShowDialog(new WindowWrapper(GetActiveWindow()));
+            var filenames = res == DialogResult.OK ? fd.FileNames : new string[0];
+            fd.Dispose();
+            return filenames;
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            cb.Invoke(OpenFilePanel(title, directory, extensions, multiselect));
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var fd = new VistaFolderBrowserDialog();
+            fd.Description = title;
+            if (!string.IsNullOrEmpty(directory)) {
+                fd.SelectedPath = GetDirectoryPath(directory);
+            }
+            var res = fd.ShowDialog(new WindowWrapper(GetActiveWindow()));
+            var filenames = res == DialogResult.OK ? new []{ fd.SelectedPath } : new string[0];
+            fd.Dispose();
+            return filenames;
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            cb.Invoke(OpenFolderPanel(title, directory, multiselect));
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            var fd = new VistaSaveFileDialog();
+            fd.Title = title;
+
+            var finalFilename = "";
+
+            if (!string.IsNullOrEmpty(directory)) {
+                finalFilename = GetDirectoryPath(directory);
+            }
+
+            if (!string.IsNullOrEmpty(defaultName)) {
+                finalFilename += defaultName;
+            }
+
+            fd.FileName = finalFilename;
+            if (extensions != null) {
+                fd.Filter = GetFilterFromFileExtensionList(extensions);
+                fd.FilterIndex = 1;
+                fd.DefaultExt = extensions[0].Extensions[0];
+                fd.AddExtension = true;
+            }
+            else {
+                fd.DefaultExt = string.Empty;
+                fd.Filter = string.Empty;
+                fd.AddExtension = false;
+            }
+            var res = fd.ShowDialog(new WindowWrapper(GetActiveWindow()));
+            var filename = res == DialogResult.OK ? fd.FileName : "";
+            fd.Dispose();
+            return filename;
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            cb.Invoke(SaveFilePanel(title, directory, defaultName, extensions));
+        }
+
+        // .NET Framework FileDialog Filter format
+        // https://msdn.microsoft.com/en-us/library/microsoft.win32.filedialog.filter
+        private static string GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            var filterString = "";
+            foreach (var filter in extensions) {
+                filterString += filter.Name + "(";
+
+                foreach (var ext in filter.Extensions) {
+                    filterString += "*." + ext + ",";
+                }
+
+                filterString = filterString.Remove(filterString.Length - 1);
+                filterString += ") |";
+
+                foreach (var ext in filter.Extensions) {
+                    filterString += "*." + ext + "; ";
+                }
+
+                filterString += "|";
+            }
+            filterString = filterString.Remove(filterString.Length - 1);
+            return filterString;
+        }
+
+        private static string GetDirectoryPath(string directory) {
+            var directoryPath = Path.GetFullPath(directory);
+            if (!directoryPath.EndsWith("\\")) {
+                directoryPath += "\\";
+            }
+            if (Path.GetPathRoot(directoryPath) == directoryPath) {
+                return directory;
+            }
+            return Path.GetDirectoryName(directoryPath) + Path.DirectorySeparatorChar;
+        }
+    }
+}
+
+#endif

Assets/StandaloneFileBrowser/StandaloneFileBrowserWindows.cs.meta

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