Working app without issue of gc.

demo.js

@@ -1,19 +1,18 @@
-const nodeDesktop = require("./index");
-const {QWidget,QGridLayout,QLabel,QMainWindow} = nodeDesktop;
+const { QtGui, QtWidgets } = require(".");
 
-const win = new QMainWindow();
-
-const view = new QWidget();
+// const app = new QtGui.QApplication();
+const win = new QtWidgets.QMainWindow();
+const view = new QtGui.QWidget();
 win.setCentralWidget(view);
 
-const gridLayout = new QGridLayout();
+const gridLayout = new QtWidgets.QGridLayout();
 
-const label = new QLabel();
-label.setText('Testing1234');
+const label = new QtWidgets.QLabel();
+label.setText("Testing1234");
 
-const label2 = new QLabel();
-label2.setText('Hello12321');
-label2.setStyleSheet('background-color:blue; color:white;');
+const label2 = new QtWidgets.QLabel();
+label2.setText("Hello12321");
+label2.setStyleSheet("background-color:blue; color:white;");
 
 gridLayout.addWidget(label);
 gridLayout.addWidget(label2);
@@ -21,6 +20,6 @@ gridLayout.addWidget(label2);
 view.setLayout(gridLayout);
 
 win.show();
+// app.exec();
 
-console.log("THIS RAN");
-setInterval(()=>console.log("SHOW OFF"), 1000);
+global.win = win; //to keep gc from collecting

index.d.ts

@@ -1,5 +0,0 @@
-interface NodeDesktop {
-  myMethod1: (arg1: number) => null;
-}
-
-export default NodeDesktop;

index.js

@@ -1,3 +0,0 @@
-const addon = require("./build/Release/node_desktop.node");
-
-module.exports = addon;

package.json

@@ -2,16 +2,19 @@
   "name": "node_desktop",
   "version": "1.0.0",
   "description": "A cross platform library to build native desktop apps. Based on Qt5.",
-  "main": "src/index.js",
+  "main": "dist/",
   "author": "Atul R <atulanand94@gmail.com>",
   "license": "MIT",
   "private": false,
   "devDependencies": {
-    "node-gyp": "^4.0.0"
+    "@types/lodash": "^4.14.130",
+    "@types/node": "^12.0.2",
+    "node-gyp": "^4.0.0",
+    "typescript": "^3.4.5"
   },
-  "types": "index.d.ts",
   "scripts": {
-    "build": "node-gyp -j 8 rebuild",
+    "build:addon": "node-gyp -j 8 rebuild",
+    "build:lib": "rm -rf ./dist/ && tsc",
     "dev": "qode demo.js"
   },
   "dependencies": {

src/index.ts

@@ -0,0 +1,18 @@
+import { QApplication } from "./lib/QtGui/QApplication";
+import { QWidget } from "./lib/QtGui/QWidget";
+import { QGridLayout } from "./lib/QtWidgets/QGridLayout";
+import { QLabel } from "./lib/QtWidgets/QLabel";
+import { QLayout } from "./lib/QtWidgets/QLayout";
+import { QMainWindow } from "./lib/QtWidgets/QMainWindow";
+
+export const QtGui = {
+  QApplication,
+  QWidget
+};
+
+export const QtWidgets = {
+  QGridLayout,
+  QLabel,
+  QMainWindow,
+  QLayout
+};

src/lib/QtGui/QApplication/index.ts

@@ -0,0 +1,12 @@
+import addon from "../../core/addon";
+import { Component } from "../../core/Component";
+
+export class QApplication extends Component {
+  native = new addon.QApplication();
+  processEvents() {
+    this.native.processEvents();
+  }
+  exec() {
+    this.native.exec();
+  }
+}

src/lib/QtGui/QWidget/index.ts

@@ -0,0 +1,32 @@
+import addon from "../../core/addon";
+import { QLayout } from "../../QtWidgets/QLayout";
+import { Component } from "../../core/Component";
+
+export class QWidget extends Component {
+  native: any;
+  constructor(parent?: QWidget) {
+    super();
+    if (parent) {
+      this.native = new addon.QWidget(parent.native);
+      this.parent = parent;
+    } else {
+      this.native = new addon.QWidget();
+    }
+  }
+  show() {
+    this.native.show();
+  }
+  resize(width: number, height: number) {
+    this.native.resize(width, height);
+  }
+  close() {
+    this.native.close();
+  }
+  setLayout(parentLayout: QLayout) {
+    this.native.setLayout(parentLayout.native);
+    this.parent = parentLayout;
+  }
+  setStyleSheet(style: string) {
+    this.native.setStyleSheet(style);
+  }
+}

src/lib/QtWidgets/QGridLayout/index.ts

@@ -0,0 +1,20 @@
+import addon from "../../core/addon";
+import { QWidget } from "../../QtGui/QWidget";
+import { Component } from "../../core/Component";
+
+export class QGridLayout extends Component {
+  native: any;
+  constructor(parent?: QWidget) {
+    super();
+    if (parent) {
+      this.native = new addon.QGridLayout(parent.native);
+      this.parent = parent;
+    } else {
+      this.native = new addon.QGridLayout();
+    }
+  }
+  addWidget(widget: QWidget) {
+    this.native.addWidget(widget.native);
+    this.children.add(widget);
+  }
+}

src/lib/QtWidgets/QLabel/index.ts

@@ -0,0 +1,25 @@
+import addon from "../../core/addon";
+import { QWidget } from "../../QtGui/QWidget";
+import { Component } from "../../core/Component";
+
+export class QLabel extends Component {
+  native: any;
+  constructor(parent?: QWidget) {
+    super();
+    if (parent) {
+      this.native = new addon.QLabel(parent.native);
+      this.parent = parent;
+    } else {
+      this.native = new addon.QLabel();
+    }
+  }
+  setWordWrap(on: boolean) {
+    this.native.setWordWrap(on);
+  }
+  setText(text: string) {
+    this.native.setText(text);
+  }
+  setStyleSheet(style: string) {
+    this.native.setStyleSheet(style);
+  }
+}

src/lib/QtWidgets/QLayout/index.ts

@@ -0,0 +1,6 @@
+import addon from "../../core/addon";
+import { Component } from "../../core/Component";
+
+export class QLayout extends Component {
+  native = new addon.QLayout();
+}

src/lib/QtWidgets/QMainWindow/index.ts

@@ -0,0 +1,32 @@
+import addon from "../../core/addon";
+import { QWidget } from "../../QtGui/QWidget";
+import { Component } from "../../core/Component";
+
+export class QMainWindow extends Component {
+  native: any;
+  constructor(parent?: QWidget) {
+    super();
+    if (parent) {
+      this.native = new addon.QMainWindow(parent.native);
+      this.parent = parent;
+    } else {
+      this.native = new addon.QMainWindow();
+    }
+  }
+  setStyleSheet(style: string) {
+    this.native.setStyleSheet(style);
+  }
+  show() {
+    this.native.show();
+  }
+  resize(width: number, height: number) {
+    this.native.resize(width, height);
+  }
+  close() {
+    this.native.close();
+  }
+  setCentralWidget(widget: QWidget) {
+    this.native.setCentralWidget(widget.native);
+    this.children.add(widget);
+  }
+}

src/lib/core/Component/index.ts

@@ -0,0 +1,5 @@
+export abstract class Component {
+  children = new Set<Component>();
+  parent: Component | null = null;
+  abstract native: any;
+}

src/lib/core/addon.ts

@@ -0,0 +1,2 @@
+const addon = require("../../../build/Release/node_desktop.node");
+export default addon;

tsconfig.json

@@ -0,0 +1,64 @@
+{
+  "compilerOptions": {
+    /* Basic Options */
+    "target": "ES2015" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
+    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
+    // "lib": [],                             /* Specify library files to be included in the compilation. */
+    // "allowJs": true /* Allow javascript files to be compiled. */,
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    "declaration": true /* Generates corresponding '.d.ts' file. */,
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    "sourceMap": true /* Generates corresponding '.map' file. */,
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    "outDir": "./dist" /* Redirect output structure to the directory. */,
+    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                     /* Enable project compilation */
+    // "incremental": true,                   /* Enable incremental compilation */
+    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    // "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true /* Enable all strict type-checking options. */,
+    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
+    // "baseUrl": "./" /* Base directory to resolve non-absolute module names. */,
+    // "paths": {} /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */,
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [] /* Type declaration files to be included in compilation. */,
+    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+    "resolveJsonModule": true
+  },
+  "include": ["."]
+}

yarn.lock

@@ -2,6 +2,16 @@
 # yarn lockfile v1
 
 
+"@types/lodash@^4.14.130":
+  version "4.14.130"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.130.tgz#04b3a690d5f4fc34579963c99adae067b8c8eb5a"
+  integrity sha512-H++wk0tbneBsRVfLkgAAd0IIpmpVr2Bj4T0HncoOsQf3/xrJexRYQK2Tqo0Ej3pFslM8GkMgdis9bu6xIb1ycw==
+
+"@types/node@^12.0.2":
+  version "12.0.2"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.2.tgz#3452a24edf9fea138b48fad4a0a028a683da1e40"
+  integrity sha512-5tabW/i+9mhrfEOUcLDu2xBPsHJ+X5Orqy9FKpale3SjDA17j5AEpYq5vfy3oAeAHGcvANRCO3NV3d2D6q3NiA==
+
 abbrev@1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
@@ -657,6 +667,11 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
   integrity sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=
 
+typescript@^3.4.5:
+  version "3.4.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.4.5.tgz#2d2618d10bb566572b8d7aad5180d84257d70a99"
+  integrity sha512-YycBxUb49UUhdNMU5aJ7z5Ej2XGmaIBL0x34vZ82fn3hGvD+bgrMrVDpatgz2f7YxUMJxMkbWxJZeAvDxVe7Vw==
+
 uri-js@^4.2.2:
   version "4.2.2"
   resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-4.2.2.tgz#94c540e1ff772956e2299507c010aea6c8838eb0"