Support most dialogs

Better JS->Go object mapping
Implement Go->JS callback mechanism
Rename `window.runtime` -> `window.wails` to better reflect the Go API

v3/TODO.md

@@ -22,8 +22,16 @@ Informal and incomplete list of things needed in v3.
   - [x] Same Window
   - [ ] Other Window
   - [ ] Dialogs
+    - [x] Info
+    - [x] Warning
+    - [x] Error
+    - [x] Question
+    - [x] OpenFile
+    - [ ] SaveFile
   - [ ] Events
+  - [ ] Screens
   - [x] Clipboard
+  - [ ] Application
 - [ ] Create `.d.ts` file
 
 ## Templates

v3/internal/runtime/desktop/dialogs.js

@@ -0,0 +1,80 @@
+/*
+ _	   __	  _ __
+| |	 / /___ _(_) /____
+| | /| / / __ `/ / / ___/
+| |/ |/ / /_/ / / (__  )
+|__/|__/\__,_/_/_/____/
+The electron alternative for Go
+(c) Lea Anthony 2019-present
+*/
+
+/* jshint esversion: 9 */
+
+import {newRuntimeCaller} from "./runtime";
+
+import { nanoid } from 'nanoid/non-secure'
+
+let call = newRuntimeCaller("dialog");
+
+let dialogResponses = new Map();
+
+function generateID() {
+    let result;
+    do {
+        result = nanoid();
+    } while (dialogResponses.has(result));
+    return result;
+}
+
+export function dialogCallback(id, data, isJSON) {
+    let p = dialogResponses.get(id);
+    if (p) {
+        if (isJSON) {
+            p.resolve(JSON.parse(data));
+        } else {
+            p.resolve(data);
+        }
+        dialogResponses.delete(id);
+    }
+}
+export function dialogErrorCallback(id, message) {
+    let p = dialogResponses.get(id);
+    if (p) {
+        p.reject(message);
+        dialogResponses.delete(id);
+    }
+}
+
+function dialog(type, options) {
+    return new Promise((resolve, reject) => {
+        let id = generateID();
+        options = options || {};
+        options["dialog-id"] = id;
+        dialogResponses.set(id, {resolve, reject});
+        call(type, options).catch((error) => {
+            reject(error);
+            dialogResponses.delete(id);
+        })
+    });
+}
+
+
+export function Info(options) {
+    return dialog("Info", options);
+}
+
+export function Warning(options) {
+    return dialog("Warning", options);
+}
+
+export function Error(options) {
+    return dialog("Error", options);
+}
+
+export function Question(options) {
+    return dialog("Question", options);
+}
+
+export function OpenFile(options) {
+    return dialog("OpenFile", options);
+}

v3/internal/runtime/desktop/main.js

@@ -15,6 +15,8 @@ import {EventsNotify, eventListeners} from "./events";
 import {SetBindings} from "./bindings";
 
 
+import {Info, Warning, Error, Question, OpenFile, dialogCallback, dialogErrorCallback, } from "./dialogs";
+
 import * as Clipboard from './clipboard';
 import {newWindow} from "./window";
 
@@ -24,13 +26,14 @@ import {newWindow} from "./window";
 
 // Internal wails endpoints
 window.wails = {
-    Callback,
+    ...newRuntime(-1),
-    callbacks,
-    EventsNotify,
-    eventListeners,
-    SetBindings,
 };
 
+window._wails = {
+    dialogCallback,
+    dialogErrorCallback,
+}
+
 
 export function newRuntime(id) {
     return {
@@ -41,10 +44,19 @@ export function newRuntime(id) {
         Clipboard: {
             ...Clipboard
         },
+        Dialog: {
+            Info,
+            Warning,
+            Error,
+            Question,
+            OpenFile,
+        },
         Window: newWindow(id),
-        Show: () => invoke("S"),
+        Application: {
-        Hide: () => invoke("H"),
+            Show: () => invoke("S"),
-        Quit: () => invoke("Q"),
+            Hide: () => invoke("H"),
+            Quit: () => invoke("Q"),
+        }
         // GetWindow: function (windowID) {
         //     if (!windowID) {
         //         return this.Window;
@@ -54,8 +66,6 @@ export function newRuntime(id) {
     }
 }
 
-window.runtime = newRuntime(-1);
-
 if (DEBUG) {
     console.log("Wails v3.0.0 Debug Mode Enabled");
 }

v3/internal/runtime/desktop/runtime.js

@@ -15,11 +15,7 @@ const runtimeURL = window.location.origin + "/wails/runtime";
 function runtimeCall(method, args) {
     let url = new URL(runtimeURL);
     url.searchParams.append("method", method);
-    if (args) {
+    url.searchParams.append("args", JSON.stringify(args));
-        for (let key in args) {
-            url.searchParams.append(key, args[key]);
-        }
-    }
     return new Promise((resolve, reject) => {
         fetch(url)
             .then(response => {
@@ -41,6 +37,7 @@ function runtimeCall(method, args) {
 export function newRuntimeCaller(object, id) {
     if (!id || id === -1) {
         return function (method, args) {
+            args = args || {};
             return runtimeCall(object + "." + method, args);
         };
     }

v3/internal/runtime/package-lock.json

@@ -11,6 +11,7 @@
       "devDependencies": {
         "esbuild": "^0.17.5",
         "happy-dom": "^8.1.5",
+        "nanoid": "^4.0.0",
         "npm-check-updates": "^16.6.3",
         "vitest": "^0.28.3"
       }
@@ -3013,15 +3014,15 @@
       "dev": true
     },
     "node_modules/nanoid": {
-      "version": "3.3.4",
+      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-4.0.0.tgz",
-      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
+      "integrity": "sha512-IgBP8piMxe/gf73RTQx7hmnhwz0aaEXYakvqZyE302IXW3HyVNhdNGC+O2MwMAVhLEnvXlvKtGbtJf6wvHihCg==",
       "dev": true,
       "bin": {
-        "nanoid": "bin/nanoid.cjs"
+        "nanoid": "bin/nanoid.js"
       },
       "engines": {
-        "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
+        "node": "^14 || ^16 || >=18"
       }
     },
     "node_modules/negotiator": {
@@ -3630,6 +3631,18 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/postcss/node_modules/nanoid": {
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
+      "dev": true,
+      "bin": {
+        "nanoid": "bin/nanoid.cjs"
+      },
+      "engines": {
+        "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
+      }
+    },
     "node_modules/pretty-format": {
       "version": "27.5.1",
       "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-27.5.1.tgz",
@@ -7157,9 +7170,9 @@
       "dev": true
     },
     "nanoid": {
-      "version": "3.3.4",
+      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-4.0.0.tgz",
-      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
+      "integrity": "sha512-IgBP8piMxe/gf73RTQx7hmnhwz0aaEXYakvqZyE302IXW3HyVNhdNGC+O2MwMAVhLEnvXlvKtGbtJf6wvHihCg==",
       "dev": true
     },
     "negotiator": {
@@ -7606,6 +7619,14 @@
         "nanoid": "^3.3.4",
         "picocolors": "^1.0.0",
         "source-map-js": "^1.0.2"
+      },
+      "dependencies": {
+        "nanoid": {
+          "version": "3.3.4",
+          "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+          "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
+          "dev": true
+        }
       }
     },
     "pretty-format": {

v3/internal/runtime/package.json

@@ -9,6 +9,7 @@
   "devDependencies": {
     "esbuild": "^0.17.5",
     "happy-dom": "^8.1.5",
+    "nanoid": "^4.0.0",
     "npm-check-updates": "^16.6.3",
     "vitest": "^0.28.3"
   }

v3/internal/runtime/runtime_production_desktop_darwin.js

@@ -1 +1 @@
-(()=>{var v=Object.defineProperty;var C=(o,e)=>{for(var t in e)v(o,t,{get:e[t],enumerable:!0})};var u=null;(function(){let o=function(n){let r=window[n.shift()];for(;r&&n.length;)r=r[n.shift()];return r},e=o(["chrome","webview","postMessage"]),t=o(["webkit","messageHandlers","external","postMessage"]);if(!e&&!t){console.error("Unsupported Platform");return}e&&(u=n=>window.chrome.webview.postMessage(n)),t&&(u=n=>window.webkit.messageHandlers.external.postMessage(n))})();function w(o,e){u(e&&e!==-1?"WINDOWID:"+e+":"+o:o)}var s={};function E(){let o=new Uint32Array(1);return window.crypto.getRandomValues(o)[0]}function O(){return Math.random()*9007199254740991}var f;window.crypto?f=E:f=O;function h(o,e,t){t==null&&(t=0);let n=window.wails.window.ID();return new Promise(function(r,i){let l;do l=o+"-"+f();while(s[l]);let a;t>0&&(a=setTimeout(function(){i(Error("Call to "+o+" timed out. Request ID: "+l))},t)),s[l]={timeoutHandle:a,reject:i,resolve:r};try{let m={name:o,args:e,callbackID:l,windowID:n};window.WailsInvoke("C"+JSON.stringify(m))}catch(m){console.error(m)}})}window.ObfuscatedCall=(o,e,t)=>(t==null&&(t=0),new Promise(function(n,r){let i;do i=o+"-"+f();while(s[i]);let l;t>0&&(l=setTimeout(function(){r(Error("Call to method "+o+" timed out. Request ID: "+i))},t)),s[i]={timeoutHandle:l,reject:r,resolve:n};try{let a={id:o,args:e,callbackID:i,windowID:window.wails.window.ID()};window.WailsInvoke("c"+JSON.stringify(a))}catch(a){console.error(a)}}));function x(o){let e;try{e=JSON.parse(o)}catch(r){let i=`Invalid JSON passed to callback: ${r.message}. Message: ${o}`;throw runtime.LogDebug(i),new Error(i)}let t=e.callbackid,n=s[t];if(!n){let r=`Callback '${t}' not registered!!!`;throw console.error(r),new Error(r)}clearTimeout(n.timeoutHandle),delete s[t],e.error?n.reject(e.error):n.resolve(e.result)}var c={};function I(o){let e=o.name;if(c[e]){let t=c[e].slice();for(let n=0;n<c[e].length;n+=1){let r=c[e][n],i=o.data;r.Callback(i)&&t.splice(n,1)}t.length===0?M(e):c[e]=t}}function S(o){let e;try{e=JSON.parse(o)}catch{let n="Invalid JSON passed to Notify: "+o;throw new Error(n)}I(e)}function M(o){delete c[o],window.WailsInvoke("EX"+o)}window.go={};function y(o){try{o=JSON.parse(o)}catch(e){console.error(e)}window.go=window.go||{},Object.keys(o).forEach(e=>{window.go[e]=window.go[e]||{},Object.keys(o[e]).forEach(t=>{window.go[e][t]=window.go[e][t]||{},Object.keys(o[e][t]).forEach(n=>{window.go[e][t][n]=function(){let r=0;function i(){let l=[].slice.call(arguments);return h([e,t,n].join("."),l,r)}return i.setTimeout=function(l){r=l},i.getTimeout=function(){return r},i}()})})})}var p={};C(p,{SetText:()=>D,Text:()=>H});var T=window.location.origin+"/wails/runtime";function b(o,e){let t=new URL(T);if(t.searchParams.append("method",o),e)for(let n in e)t.searchParams.append(n,e[n]);return new Promise((n,r)=>{fetch(t).then(i=>{if(i.ok)return i.headers.get("content-type")&&i.headers.get("content-type").indexOf("application/json")!==-1?i.json():i.text();r(Error(i.statusText))}).then(i=>n(i)).catch(i=>r(i))})}function d(o,e){return!e||e===-1?function(t,n){return b(o+"."+t,n)}:function(t,n){return n=n||{},n.windowID=e,b(o+"."+t,n)}}var g=d("clipboard");function D(o){return g("SetText",{text:o})}function H(){return g("Text")}function k(o){let e=d("window",o);return{Center:()=>e("Center"),SetTitle:t=>e("SetTitle",{title:t}),Fullscreen:()=>e("Fullscreen"),UnFullscreen:()=>e("UnFullscreen"),SetSize:(t,n)=>e("SetSize",{width:t,height:n}),Size:()=>e("Size"),SetMaxSize:(t,n)=>e("SetMaxSize",{width:t,height:n}),SetMinSize:(t,n)=>e("SetMinSize",{width:t,height:n}),SetAlwaysOnTop:t=>e("SetAlwaysOnTop",{alwaysOnTop:t}),SetPosition:(t,n)=>e("SetPosition",{x:t,y:n}),Position:()=>e("Position"),Screen:()=>e("Screen"),Hide:()=>e("Hide"),Maximise:()=>e("Maximise"),Show:()=>e("Show"),ToggleMaximise:()=>e("ToggleMaximise"),UnMaximise:()=>e("UnMaximise"),Minimise:()=>e("Minimise"),UnMinimise:()=>e("UnMinimise"),SetBackgroundColour:(t,n,r,i)=>e("SetBackgroundColour",{R,G,B,A})}}window.wails={Callback:x,callbacks:s,EventsNotify:S,eventListeners:c,SetBindings:y};function U(o){return{Clipboard:{...p},Window:k(o),Show:()=>w("S"),Hide:()=>w("H"),Quit:()=>w("Q")}}window.runtime=U(-1);console.log("Wails v3.0.0 Debug Mode Enabled");})();
+(()=>{var I=Object.defineProperty;var M=(t,e)=>{for(var n in e)I(t,n,{get:e[n],enumerable:!0})};var c=null;(function(){let t=function(o){let i=window[o.shift()];for(;i&&o.length;)i=i[o.shift()];return i},e=t(["chrome","webview","postMessage"]),n=t(["webkit","messageHandlers","external","postMessage"]);if(!e&&!n){console.error("Unsupported Platform");return}e&&(c=o=>window.chrome.webview.postMessage(o)),n&&(c=o=>window.webkit.messageHandlers.external.postMessage(o))})();function u(t,e){c(e&&e!==-1?"WINDOWID:"+e+":"+t:t)}var m={};function D(){let t=new Uint32Array(1);return window.crypto.getRandomValues(t)[0]}function T(){return Math.random()*9007199254740991}var w;window.crypto?w=D:w=T;window.ObfuscatedCall=(t,e,n)=>(n==null&&(n=0),new Promise(function(o,i){let r;do r=t+"-"+w();while(m[r]);let p;n>0&&(p=setTimeout(function(){i(Error("Call to method "+t+" timed out. Request ID: "+r))},n)),m[r]={timeoutHandle:p,reject:i,resolve:o};try{let f={id:t,args:e,callbackID:r,windowID:window.wails.window.ID()};window.WailsInvoke("c"+JSON.stringify(f))}catch(f){console.error(f)}}));window.go={};var W=window.location.origin+"/wails/runtime";function h(t,e){let n=new URL(W);return n.searchParams.append("method",t),n.searchParams.append("args",JSON.stringify(e)),new Promise((o,i)=>{fetch(n).then(r=>{if(r.ok)return r.headers.get("content-type")&&r.headers.get("content-type").indexOf("application/json")!==-1?r.json():r.text();i(Error(r.statusText))}).then(r=>o(r)).catch(r=>i(r))})}function s(t,e){return!e||e===-1?function(n,o){return o=o||{},h(t+"."+n,o)}:function(n,o){return o=o||{},o.windowID=e,h(t+"."+n,o)}}var H="useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict";var x=(t=21)=>{let e="",n=t;for(;n--;)e+=H[Math.random()*64|0];return e};var P=s("dialog"),l=new Map;function U(){let t;do t=x();while(l.has(t));return t}function g(t,e,n){let o=l.get(t);o&&(n?o.resolve(JSON.parse(e)):o.resolve(e),l.delete(t))}function S(t,e){let n=l.get(t);n&&(n.reject(e),l.delete(t))}function a(t,e){return new Promise((n,o)=>{let i=U();e=e||{},e["dialog-id"]=i,l.set(i,{resolve:n,reject:o}),P(t,e).catch(r=>{o(r),l.delete(i)})})}function b(t){return a("Info",t)}function y(t){return a("Warning",t)}function C(t){return a("Error",t)}function k(t){return a("Question",t)}function E(t){return a("OpenFile",t)}var d={};M(d,{SetText:()=>J,Text:()=>L});var O=s("clipboard");function J(t){return O("SetText",{text:t})}function L(){return O("Text")}function v(t){let e=s("window",t);return{Center:()=>e("Center"),SetTitle:n=>e("SetTitle",{title:n}),Fullscreen:()=>e("Fullscreen"),UnFullscreen:()=>e("UnFullscreen"),SetSize:(n,o)=>e("SetSize",{width:n,height:o}),Size:()=>e("Size"),SetMaxSize:(n,o)=>e("SetMaxSize",{width:n,height:o}),SetMinSize:(n,o)=>e("SetMinSize",{width:n,height:o}),SetAlwaysOnTop:n=>e("SetAlwaysOnTop",{alwaysOnTop:n}),SetPosition:(n,o)=>e("SetPosition",{x:n,y:o}),Position:()=>e("Position"),Screen:()=>e("Screen"),Hide:()=>e("Hide"),Maximise:()=>e("Maximise"),Show:()=>e("Show"),ToggleMaximise:()=>e("ToggleMaximise"),UnMaximise:()=>e("UnMaximise"),Minimise:()=>e("Minimise"),UnMinimise:()=>e("UnMinimise"),SetBackgroundColour:(n,o,i,r)=>e("SetBackgroundColour",{R,G,B,A})}}window.wails={...z(-1)};window._wails={dialogCallback:g,dialogErrorCallback:S};function z(t){return{Clipboard:{...d},Dialog:{Info:b,Warning:y,Error:C,Question:k,OpenFile:E},Window:v(t),Application:{Show:()=>u("S"),Hide:()=>u("H"),Quit:()=>u("Q")}}}console.log("Wails v3.0.0 Debug Mode Enabled");})();

v3/internal/runtime/runtime_production_desktop_linux.js

@@ -1 +1 @@
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v3/internal/runtime/runtime_production_desktop_windows.js

@@ -1 +1 @@
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v3/pkg/application/application.go

@@ -228,7 +228,7 @@ func (a *App) Run() error {
 	// set the application menu
 	a.impl.setApplicationMenu(a.ApplicationMenu)
 
-	// set the application icon
+	// set the application Icon
 	a.impl.setIcon(a.options.Icon)
 
 	return a.impl.run()
@@ -389,3 +389,9 @@ func (a *App) dispatchOnMainThread(fn func()) {
 	// Call platform specific dispatch function
 	a.impl.dispatchOnMainThread(id)
 }
+
+func (a *App) OpenFileDialogWithOptions(options *OpenFileDialogOptions) *OpenFileDialog {
+	result := a.OpenFileDialog()
+	result.SetOptions(options)
+	return result
+}

v3/pkg/application/dialogs.go

@@ -46,9 +46,9 @@ const (
 )
 
 type Button struct {
-	label     string
+	Label     string
-	isCancel  bool
+	IsCancel  bool
-	isDefault bool
+	IsDefault bool
 	callback  func()
 }
 
@@ -60,12 +60,16 @@ type messageDialogImpl interface {
 	show()
 }
 
+type MessageDialogOptions struct {
+	DialogType DialogType
+	Title      string
+	Message    string
+	Buttons    []*Button
+	Icon       []byte
+}
+
 type MessageDialog struct {
-	dialogType DialogType
+	MessageDialogOptions
-	title      string
-	message    string
-	buttons    []*Button
-	icon       []byte
 
 	// platform independent
 	impl messageDialogImpl
@@ -80,13 +84,16 @@ var defaultTitles = map[DialogType]string{
 
 func newMessageDialog(dialogType DialogType) *MessageDialog {
 	return &MessageDialog{
-		dialogType: dialogType,
+		MessageDialogOptions: MessageDialogOptions{
-		title:      defaultTitles[dialogType],
+			DialogType: dialogType,
+			Title:      defaultTitles[dialogType],
+		},
+		impl: nil,
 	}
 }
 
 func (d *MessageDialog) SetTitle(title string) *MessageDialog {
-	d.title = title
+	d.Title = title
 	return d
 }
 
@@ -98,36 +105,41 @@ func (d *MessageDialog) Show() {
 }
 
 func (d *MessageDialog) SetIcon(icon []byte) *MessageDialog {
-	d.icon = icon
+	d.Icon = icon
 	return d
 }
 
 func (d *MessageDialog) AddButton(s string) *Button {
 	result := &Button{
-		label: s,
+		Label: s,
 	}
-	d.buttons = append(d.buttons, result)
+	d.Buttons = append(d.Buttons, result)
 	return result
 }
 
+func (d *MessageDialog) AddButtons(buttons []*Button) *MessageDialog {
+	d.Buttons = buttons
+	return d
+}
+
 func (d *MessageDialog) SetDefaultButton(button *Button) *MessageDialog {
-	for _, b := range d.buttons {
+	for _, b := range d.Buttons {
-		b.isDefault = false
+		b.IsDefault = false
 	}
-	button.isDefault = true
+	button.IsDefault = true
 	return d
 }
 
 func (d *MessageDialog) SetCancelButton(button *Button) *MessageDialog {
-	for _, b := range d.buttons {
+	for _, b := range d.Buttons {
-		b.isCancel = false
+		b.IsCancel = false
 	}
-	button.isCancel = true
+	button.IsCancel = true
 	return d
 }
 
-func (d *MessageDialog) SetMessage(title string) *MessageDialog {
+func (d *MessageDialog) SetMessage(message string) *MessageDialog {
-	d.title = title
+	d.Message = message
 	return d
 }
 
@@ -135,9 +147,28 @@ type openFileDialogImpl interface {
 	show() ([]string, error)
 }
 
-type fileFilter struct {
+type FileFilter struct {
-	displayName string // Filter information EG: "Image Files (*.jpg, *.png)"
+	DisplayName string // Filter information EG: "Image Files (*.jpg, *.png)"
-	pattern     string // semicolon separated list of extensions, EG: "*.jpg;*.png"
+	Pattern     string // semicolon separated list of extensions, EG: "*.jpg;*.png"
+}
+
+type OpenFileDialogOptions struct {
+	CanChooseDirectories            bool
+	CanChooseFiles                  bool
+	CanCreateDirectories            bool
+	ShowHiddenFiles                 bool
+	ResolvesAliases                 bool
+	AllowsMultipleSelection         bool
+	HideExtension                   bool
+	CanSelectHiddenExtension        bool
+	TreatsFilePackagesAsDirectories bool
+	AllowsOtherFileTypes            bool
+	Filters                         []FileFilter
+
+	Title      string
+	Message    string
+	ButtonText string
+	Directory  string
 }
 
 type OpenFileDialog struct {
@@ -152,7 +183,7 @@ type OpenFileDialog struct {
 	canSelectHiddenExtension        bool
 	treatsFilePackagesAsDirectories bool
 	allowsOtherFileTypes            bool
-	filters                         []fileFilter
+	filters                         []FileFilter
 
 	title      string
 	message    string
@@ -230,9 +261,9 @@ func (d *OpenFileDialog) PromptForSingleSelection() (string, error) {
 // AddFilter adds a filter to the dialog. The filter is a display name and a semicolon separated list of extensions.
 // EG: AddFilter("Image Files", "*.jpg;*.png")
 func (d *OpenFileDialog) AddFilter(displayName, pattern string) *OpenFileDialog {
-	d.filters = append(d.filters, fileFilter{
+	d.filters = append(d.filters, FileFilter{
-		displayName: strings.TrimSpace(displayName),
+		DisplayName: strings.TrimSpace(displayName),
-		pattern:     strings.TrimSpace(pattern),
+		Pattern:     strings.TrimSpace(pattern),
 	})
 	return d
 }
@@ -265,6 +296,24 @@ func (d *OpenFileDialog) CanSelectHiddenExtension(canSelectHiddenExtension bool)
 	return d
 }
 
+func (d *OpenFileDialog) SetOptions(options *OpenFileDialogOptions) {
+	d.title = options.Title
+	d.message = options.Message
+	d.buttonText = options.ButtonText
+	d.directory = options.Directory
+	d.canChooseDirectories = options.CanChooseDirectories
+	d.canChooseFiles = options.CanChooseFiles
+	d.canCreateDirectories = options.CanCreateDirectories
+	d.showHiddenFiles = options.ShowHiddenFiles
+	d.resolvesAliases = options.ResolvesAliases
+	d.allowsMultipleSelection = options.AllowsMultipleSelection
+	d.hideExtension = options.HideExtension
+	d.canSelectHiddenExtension = options.CanSelectHiddenExtension
+	d.treatsFilePackagesAsDirectories = options.TreatsFilePackagesAsDirectories
+	d.allowsOtherFileTypes = options.AllowsOtherFileTypes
+	d.filters = options.Filters
+}
+
 func newOpenFileDialog() *OpenFileDialog {
 	return &OpenFileDialog{
 		id:                   getDialogID(),

v3/pkg/application/dialogs_darwin.go

@@ -61,7 +61,7 @@ static void* createAlert(int alertType, char* title, char *message, void *icon,
 			NSImage *image = [NSImage imageNamed:NSImageNameInfo];
 			[alert setIcon:image];
 		}
-}
+	}
 	return alert;
 
 }
@@ -315,54 +315,54 @@ type macosDialog struct {
 func (m *macosDialog) show() {
 	globalApplication.dispatchOnMainThread(func() {
 
-		// Mac can only have 4 buttons on a dialog
+		// Mac can only have 4 Buttons on a dialog
-		if len(m.dialog.buttons) > 4 {
+		if len(m.dialog.Buttons) > 4 {
-			m.dialog.buttons = m.dialog.buttons[:4]
+			m.dialog.Buttons = m.dialog.Buttons[:4]
 		}
 
 		if m.nsDialog != nil {
 			C.releaseDialog(m.nsDialog)
 		}
 		var title *C.char
-		if m.dialog.title != "" {
+		if m.dialog.Title != "" {
-			title = C.CString(m.dialog.title)
+			title = C.CString(m.dialog.Title)
 		}
 		var message *C.char
-		if m.dialog.message != "" {
+		if m.dialog.Message != "" {
-			message = C.CString(m.dialog.message)
+			message = C.CString(m.dialog.Message)
 		}
 		var iconData unsafe.Pointer
 		var iconLength C.int
-		if m.dialog.icon != nil {
+		if m.dialog.Icon != nil {
-			iconData = unsafe.Pointer(&m.dialog.icon[0])
+			iconData = unsafe.Pointer(&m.dialog.Icon[0])
-			iconLength = C.int(len(m.dialog.icon))
+			iconLength = C.int(len(m.dialog.Icon))
 		} else {
-			// if it's an error, use the application icon
+			// if it's an error, use the application Icon
-			if m.dialog.dialogType == ErrorDialog {
+			if m.dialog.DialogType == ErrorDialog {
 				iconData = unsafe.Pointer(&globalApplication.options.Icon[0])
 				iconLength = C.int(len(globalApplication.options.Icon))
 			}
 		}
 
-		alertType, ok := alertTypeMap[m.dialog.dialogType]
+		alertType, ok := alertTypeMap[m.dialog.DialogType]
 		if !ok {
 			alertType = C.NSAlertStyleInformational
 		}
 
 		m.nsDialog = C.createAlert(alertType, title, message, iconData, iconLength)
 
-		// Reverse the buttons so that the default is on the right
+		// Reverse the Buttons so that the default is on the right
-		reversedButtons := make([]*Button, len(m.dialog.buttons))
+		reversedButtons := make([]*Button, len(m.dialog.Buttons))
 		var count = 0
-		for i := len(m.dialog.buttons) - 1; i >= 0; i-- {
+		for i := len(m.dialog.Buttons) - 1; i >= 0; i-- {
-			button := m.dialog.buttons[i]
+			button := m.dialog.Buttons[i]
-			C.alertAddButton(m.nsDialog, C.CString(button.label), C.bool(button.isDefault), C.bool(button.isCancel))
+			C.alertAddButton(m.nsDialog, C.CString(button.Label), C.bool(button.IsDefault), C.bool(button.IsCancel))
-			reversedButtons[count] = m.dialog.buttons[i]
+			reversedButtons[count] = m.dialog.Buttons[i]
 			count++
 		}
 
 		buttonPressed := int(C.dialogRunModal(m.nsDialog))
-		if len(m.dialog.buttons) > buttonPressed {
+		if len(m.dialog.Buttons) > buttonPressed {
 			button := reversedButtons[buttonPressed]
 			if button.callback != nil {
 				button.callback()
@@ -410,7 +410,7 @@ func (m *macosOpenFileDialog) show() ([]string, error) {
 	if len(m.dialog.filters) > 0 {
 		var allPatterns []string
 		for _, filter := range m.dialog.filters {
-			patternComponents := strings.Split(filter.pattern, ";")
+			patternComponents := strings.Split(filter.Pattern, ";")
 			for i, component := range patternComponents {
 				filterPattern := strings.TrimSpace(component)
 				filterPattern = strings.TrimPrefix(filterPattern, "*.")

v3/pkg/application/messageprocessor.go

@@ -21,7 +21,7 @@ func NewMessageProcessor(w *WebviewWindow) *MessageProcessor {
 func (m *MessageProcessor) httpError(rw http.ResponseWriter, message string, args ...any) {
 	m.Error(message, args...)
 	rw.WriteHeader(http.StatusBadRequest)
-	rw.Write([]byte(message))
+	rw.Write([]byte(fmt.Sprintf(message, args...)))
 }
 
 func (m *MessageProcessor) HandleRuntimeCall(rw http.ResponseWriter, r *http.Request) {
@@ -59,6 +59,8 @@ func (m *MessageProcessor) HandleRuntimeCall(rw http.ResponseWriter, r *http.Req
 		m.processWindowMethod(method, rw, r, targetWindow, params)
 	case "clipboard":
 		m.processClipboardMethod(method, rw, r, targetWindow, params)
+	case "dialog":
+		m.processDialogMethod(method, rw, r, targetWindow, params)
 	default:
 		m.httpError(rw, "Unknown runtime call: %s", object)
 	}

v3/pkg/application/messageprocessor_clipboard.go

@@ -4,11 +4,11 @@ import (
 	"net/http"
 )
 
-func (m *MessageProcessor) processClipboardMethod(method string, rw http.ResponseWriter, r *http.Request, window *WebviewWindow, params QueryParams) {
+func (m *MessageProcessor) processClipboardMethod(method string, rw http.ResponseWriter, r *http.Request, window *WebviewWindow, args QueryParams) {
 
 	switch method {
 	case "SetText":
-		title := params.String("text")
+		title := args.String("text")
 		if title == nil {
 			m.Error("SetText: text is required")
 			return

v3/pkg/application/messageprocessor_dialog.go

@@ -0,0 +1,109 @@
+package application
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"runtime"
+	"strconv"
+)
+
+func (m *MessageProcessor) dialogErrorCallback(message string, dialogID *string, err error) {
+	errorMsg := fmt.Sprintf(message, err)
+	m.Error(errorMsg)
+	msg := "_wails.dialogErrorCallback('" + *dialogID + "', " + strconv.Quote(errorMsg) + ");"
+	m.window.ExecJS(msg)
+}
+
+func (m *MessageProcessor) dialogCallback(dialogID *string, result string, isJSON bool) {
+	msg := fmt.Sprintf("_wails.dialogCallback('%s', %s, %v);", *dialogID, strconv.Quote(result), isJSON)
+	m.window.ExecJS(msg)
+}
+
+func (m *MessageProcessor) processDialogMethod(method string, rw http.ResponseWriter, r *http.Request, window *WebviewWindow, params QueryParams) {
+
+	args, err := params.Args()
+	if err != nil {
+		m.httpError(rw, "Unable to parse arguments: %s", err)
+		return
+	}
+	dialogID := args.String("dialog-id")
+	if dialogID == nil {
+		m.Error("dialog-id is required")
+		return
+	}
+	switch method {
+	case "Info", "Warning", "Error", "Question":
+		var options MessageDialogOptions
+		err := params.ToStruct(&options)
+		if err != nil {
+			m.dialogErrorCallback("Error parsing dialog options: %s", dialogID, err)
+			return
+		}
+		if len(options.Buttons) == 0 {
+			switch runtime.GOOS {
+			case "darwin":
+				options.Buttons = []*Button{{Label: "OK", IsDefault: true}}
+			}
+		}
+		var dialog *MessageDialog
+		switch method {
+		case "Info":
+			dialog = globalApplication.InfoDialog()
+		case "Warning":
+			dialog = globalApplication.WarningDialog()
+		case "Error":
+			dialog = globalApplication.ErrorDialog()
+		case "Question":
+			dialog = globalApplication.QuestionDialog()
+		}
+		// TODO: Add support for attaching Message dialogs to windows
+		dialog.SetTitle(options.Title)
+		dialog.SetMessage(options.Message)
+		for _, button := range options.Buttons {
+			label := button.Label
+			button.OnClick(func() {
+				m.dialogCallback(dialogID, label, false)
+			})
+		}
+		dialog.AddButtons(options.Buttons)
+		dialog.Show()
+		m.ok(rw)
+	case "OpenFile":
+		var options OpenFileDialogOptions
+		err := params.ToStruct(&options)
+		if err != nil {
+			m.httpError(rw, "Error parsing dialog options: %s", err.Error())
+			return
+		}
+		dialog := globalApplication.OpenFileDialogWithOptions(&options)
+
+		go func() {
+			if options.AllowsMultipleSelection {
+				files, err := dialog.PromptForMultipleSelection()
+				if err != nil {
+					m.dialogErrorCallback("Error getting selection: %s", dialogID, err)
+					return
+				} else {
+					result, err := json.Marshal(files)
+					if err != nil {
+						m.dialogErrorCallback("Error marshalling files: %s", dialogID, err)
+						return
+					}
+					m.dialogCallback(dialogID, string(result), true)
+				}
+			} else {
+				file, err := dialog.PromptForSingleSelection()
+				if err != nil {
+					m.dialogErrorCallback("Error getting selection: %s", dialogID, err)
+					return
+				}
+				m.dialogCallback(dialogID, file, false)
+			}
+		}()
+		m.ok(rw)
+	default:
+		m.httpError(rw, "Unknown dialog method: %s", method)
+	}
+
+}

v3/pkg/application/messageprocessor_params.go

@@ -1,6 +1,10 @@
 package application
 
-import "strconv"
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+)
 
 type QueryParams map[string][]string
 
@@ -93,3 +97,94 @@ func (qp QueryParams) Float64(key string) *float64 {
 	}
 	return &result
 }
+
+func (qp QueryParams) ToStruct(str any) error {
+	args := qp["args"]
+	if len(args) == 1 {
+		return json.Unmarshal([]byte(args[0]), &str)
+	}
+	return nil
+}
+
+type Args struct {
+	data map[string]any
+}
+
+func (a *Args) String(key string) *string {
+	if a == nil {
+		return nil
+	}
+	if val := a.data[key]; val != nil {
+		result := fmt.Sprintf("%v", val)
+		return &result
+	}
+	return nil
+}
+
+func (a *Args) Int(s string) *int {
+	if a == nil {
+		return nil
+	}
+	if val := a.data[s]; val != nil {
+		result := val.(int)
+		return &result
+	}
+	return nil
+}
+
+func (a *Args) UInt8(s string) *uint8 {
+	if a == nil {
+		return nil
+	}
+	if val := a.data[s]; val != nil {
+		result := val.(uint8)
+		return &result
+	}
+	return nil
+}
+func (a *Args) UInt(s string) *uint {
+	if a == nil {
+		return nil
+	}
+	if val := a.data[s]; val != nil {
+		result := val.(uint)
+		return &result
+	}
+	return nil
+}
+
+func (a *Args) Float64(s string) *float64 {
+	if a == nil {
+		return nil
+	}
+	if val := a.data[s]; val != nil {
+		result := val.(float64)
+		return &result
+	}
+	return nil
+}
+
+func (a *Args) Bool(s string) *bool {
+	if a == nil {
+		return nil
+	}
+	if val := a.data[s]; val != nil {
+		result := val.(bool)
+		return &result
+	}
+	return nil
+}
+
+func (qp QueryParams) Args() (*Args, error) {
+	argData := qp["args"]
+	var result = &Args{
+		data: make(map[string]any),
+	}
+	if len(argData) == 1 {
+		err := json.Unmarshal([]byte(argData[0]), &result.data)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return result, nil
+}

v3/pkg/application/messageprocessor_window.go

@@ -8,9 +8,15 @@ import (
 
 func (m *MessageProcessor) processWindowMethod(method string, rw http.ResponseWriter, r *http.Request, window *WebviewWindow, params QueryParams) {
 
+	args, err := params.Args()
+	if err != nil {
+		m.httpError(rw, "Unable to parse arguments: %s", err)
+		return
+	}
+
 	switch method {
 	case "SetTitle":
-		title := params.String("title")
+		title := args.String("title")
 		if title == nil {
 			m.Error("SetTitle: title is required")
 			return
@@ -18,19 +24,19 @@ func (m *MessageProcessor) processWindowMethod(method string, rw http.ResponseWr
 		window.SetTitle(*title)
 		m.ok(rw)
 	case "SetSize":
-		width := params.Int("width")
+		width := args.Int("width")
-		height := params.Int("height")
+		height := args.Int("height")
 		if width == nil || height == nil {
-			m.Error("Invalid SetSize message")
+			m.Error("Invalid SetSize Message")
 			return
 		}
 		window.SetSize(*width, *height)
 		m.ok(rw)
 	case "SetPosition":
-		x := params.Int("x")
+		x := args.Int("x")
-		y := params.Int("y")
+		y := args.Int("y")
 		if x == nil || y == nil {
-			m.Error("Invalid SetPosition message")
+			m.Error("Invalid SetPosition Message")
 			return
 		}
 		window.SetPosition(*x, *y)
@@ -78,24 +84,24 @@ func (m *MessageProcessor) processWindowMethod(method string, rw http.ResponseWr
 			"y": y,
 		})
 	case "SetBackgroundColour":
-		r := params.UInt8("r")
+		r := args.UInt8("r")
 		if r == nil {
-			m.Error("Invalid SetBackgroundColour message: 'r' value required")
+			m.Error("Invalid SetBackgroundColour Message: 'r' value required")
 			return
 		}
-		g := params.UInt8("g")
+		g := args.UInt8("g")
 		if g == nil {
-			m.Error("Invalid SetBackgroundColour message: 'g' value required")
+			m.Error("Invalid SetBackgroundColour Message: 'g' value required")
 			return
 		}
-		b := params.UInt8("b")
+		b := args.UInt8("b")
 		if b == nil {
-			m.Error("Invalid SetBackgroundColour message: 'b' value required")
+			m.Error("Invalid SetBackgroundColour Message: 'b' value required")
 			return
 		}
-		a := params.UInt8("a")
+		a := args.UInt8("a")
 		if a == nil {
-			m.Error("Invalid SetBackgroundColour message: 'a' value required")
+			m.Error("Invalid SetBackgroundColour Message: 'a' value required")
 			return
 		}
 		window.SetBackgroundColour(&options.RGBA{
@@ -106,35 +112,35 @@ func (m *MessageProcessor) processWindowMethod(method string, rw http.ResponseWr
 		})
 		m.ok(rw)
 	case "SetAlwaysOnTop":
-		alwaysOnTop := params.Bool("alwaysOnTop")
+		alwaysOnTop := args.Bool("alwaysOnTop")
 		if alwaysOnTop == nil {
-			m.Error("Invalid SetAlwaysOnTop message: 'alwaysOnTop' value required")
+			m.Error("Invalid SetAlwaysOnTop Message: 'alwaysOnTop' value required")
 			return
 		}
 		window.SetAlwaysOnTop(*alwaysOnTop)
 		m.ok(rw)
 	case "SetResizable":
-		resizable := params.Bool("resizable")
+		resizable := args.Bool("resizable")
 		if resizable == nil {
-			m.Error("Invalid SetResizable message: 'resizable' value required")
+			m.Error("Invalid SetResizable Message: 'resizable' value required")
 			return
 		}
 		window.SetResizable(*resizable)
 		m.ok(rw)
 	case "SetMinSize":
-		width := params.Int("width")
+		width := args.Int("width")
-		height := params.Int("height")
+		height := args.Int("height")
 		if width == nil || height == nil {
-			m.Error("Invalid SetMinSize message")
+			m.Error("Invalid SetMinSize Message")
 			return
 		}
 		window.SetMinSize(*width, *height)
 		m.ok(rw)
 	case "SetMaxSize":
-		width := params.Int("width")
+		width := args.Int("width")
-		height := params.Int("height")
+		height := args.Int("height")
 		if width == nil || height == nil {
-			m.Error("Invalid SetMaxSize message")
+			m.Error("Invalid SetMaxSize Message")
 			return
 		}
 		window.SetMaxSize(*width, *height)
@@ -171,9 +177,9 @@ func (m *MessageProcessor) processWindowMethod(method string, rw http.ResponseWr
 		}
 		m.json(rw, screen)
 	case "SetZoom":
-		zoomLevel := params.Float64("zoomLevel")
+		zoomLevel := args.Float64("zoomLevel")
 		if zoomLevel == nil {
-			m.Error("Invalid SetZoom message: invalid 'zoomLevel' value")
+			m.Error("Invalid SetZoom Message: invalid 'zoomLevel' value")
 			return
 		}
 		window.SetZoom(*zoomLevel)