Electron qt开发教程

标签：教程 qt args isolate electron Electron v8 Local

模块安装打包

npm install -g electron-forge
electron-forge init my-project --template=vue
npm start //进入目录启动
//打包成一个目录到out目录下，注意这种打包一般用于调试，并不是用于分发
npm run package
//打出真正的分发包，放在out\make目录下
npm run make

npx @electron-forge/cli@latest import
npx create-electron-app my-app

npm install mousetrap //快捷键绑定库

npm install worker_threads //工作线程模块
npm install worker-loader //
npm init //C++项目目录下初始化项目
npm install --global --production windows-build-tools

快速体验

npm install -g electron-prebuilt
git clone https://github.com/electron/electron-quick-start
cd electron-quick-start
npm install && npm start

cnpm install electron-packager -g
"scripts": {"package":"electron-packager . HelloWorld --platform=win32 --arch=x64 --icon=computer.ico --out=./out --asar --app-version=0.0.1 --overwrite --ignore=node_modules"
}
npm run package

@python "%~dp0gyp_main.py" %*

JS调用C++

#include <node.h>
#include <v8.h>

using namespace v8;

// 传入了两个参数，args[0] 字符串，args[1] 回调函数
void hello(const FunctionCallbackInfo<Value>& args) {
  // 使用 HandleScope 来管理生命周期
  Isolate* isolate = Isolate::GetCurrent();
  HandleScope scope(isolate);

  // 判断参数格式和格式
  if (args.Length() < 2 || !args[0]->IsString()) {
    isolate->ThrowException(Exception::TypeError(
      String::NewFromUtf8(isolate, "Wrong arguments")));
    return;
  }

  // callback, 使用Cast方法来转换
  Local<Function> callback = Local<Function>::Cast(args[1]);
  Local<Value> argv[1] = {
    // 拼接String
    String::Concat(Local<String>::Cast(args[0]), String::NewFromUtf8(isolate, " world"))
  };
  // 调用回调, 参数: 当前上下文，参数个数，参数列表
  callback->Call(isolate->GetCurrentContext()->Global(), 1, argv);
}

// 相当于在 exports 对象中添加 { hello: hello }
void init(Local<Object> exports) {
  NODE_SET_METHOD(exports, "hello", hello);
}

// 将 export 对象暴露出去
// 原型 `NODE_MODULE(module_name, Initialize)`
NODE_MODULE(test, init);

//方法暴露
void Method(const FunctionCallbackInfo<Value>& args) {
  Isolate* isolate = args.GetIsolate();
  args.GetReturnValue().Set(String::NewFromUtf8(
      isolate, "world").ToLocalChecked());
}

void Initialize(Local<Object> exports) {
  NODE_SET_METHOD(exports, "hello", Method);
}

NODE_MODULE(NODE_GYP_MODULE_NAME, Initialize)
extern "C" NODE_MODULE_EXPORT void
NODE_MODULE_INITIALIZER(Local<Object> exports,
                        Local<Value> module,
                        Local<Context> context) {
  /* Perform addon initialization steps here. */
}


int main(int argc, char* argv[]) {
  // Create a stack-allocated handle scope. 
  HandleScope handle_scope;
  // Create a new context. 
  Handle<Context> context = Context::New();
  // Enter the created context for compiling and 
  // running the hello world script.
  Context::Scope context_scope(context);
  // Create a string containing the JavaScript source code. 
  Handle<String> source = String::New("'Hello' + ', World!'");
  // Compile the source code. 
  Handle<Script> script = Script::Compile(source);
  // Run the script to get the result. 
  Handle<Value> result = script->Run();
  // Convert the result to an ASCII string and print it. 
  String::AsciiValue ascii(result);
  printf("%s\n", *ascii);
  return 0;
}

//create accessor for string username
global->SetAccessor(v8::String::New("user"),userGetter,userSetter); 
//associates print on script to the Print function
global->Set(v8::String::New("print"), v8::FunctionTemplate::New(Print)); 

//注册类对象
Handle<FunctionTemplate> point_templ = FunctionTemplate::New();
point_templ->SetClassName(String::New("Point"));
Handle<ObjectTemplate> point_proto = point_templ->PrototypeTemplate();
point_proto->Set("method_a", FunctionTemplate::New(PointMethod_A));
point_proto->Set("method_b", FunctionTemplate::New(PointMethod_B));
//设置指针个数
Handle<ObjectTemplate> point_inst = point_templ->InstanceTemplate();
point_inst->SetInternalFieldCount(1);
//创建实例
Handle<Function> point_ctor = point_templ->GetFunction();
Local<Object> obj = point_ctor->NewInstance();
obj->SetInternalField(0, External::New(p));
//获取类指针处理
     Handle<Value> PointMethod_A(const Arguments& args)

2.                {

3.                    Local<Object> self = args.Holder();

4.                    Local<External> wrap = Local<External>::Cast(self->GetInternalField(0));

5.                    void* ptr = wrap->Value();

6.                    static_cast<Point*>(ptr)->Function_A();

7.                    return Integer::New(static_cast<Point*>(ptr)->x_);

8.                }

//向MakeWeak注册的callback.  
void CloudAppWeakReferenceCallback(Persistent<Value> object  
                                                , void * param) {  
    if (CloudApp* cloudapp = static_cast<CloudApp*>(param)) {  
        delete cloudapp;  
    }  
}  
  
//将C++指针通过External保存为Persistent对象，避免的指针被析构  
Handle<External> MakeWeakCloudApp(void* parameter) {  
    Persistent<External> persistentCloudApp =   
        Persistent<External>::New(External::New(parameter));  
          
//MakeWeak非常重要，当JS世界new一个CloudApp对象之后  
//C++也必须new一个对应的指针。  
//JS对象析构之后必须想办法去析构C++的指针，可以通过MakeWeak来实现，  
//MakeWeak的主要目的是为了检测Persistent Handle除了当前Persistent   
//的唯一引用外，没有其他的引用，就可以析构这个Persistent Handle了，  
//同时调用MakeWeak的callback。这是我们可以再这个callback中delete   
//C++指针  
    persistentCloudApp.MakeWeak(parameter, CloudAppWeakReferenceCallback);  
  
    return persistentCloudApp;  
}  

void Print(const v8::FunctionCallbackInfo<v8::Value>& args) {  
  bool first = true;  
  for (int i = 0; i < args.Length(); i++) {  
    v8::HandleScope handle_scope(args.GetIsolate());  
    if (first) {  
      first = false;  
    } else {  
      printf(" ");  
    }  
    v8::String::Utf8Value str(args[i]);  
    const char* cstr = ToCString(str);  
    printf("%s", cstr);  
    const char* s_result = "print call succeed\n";  
    v8::Local<v8::String>  v_result = v8::String::NewFromUtf8(args.GetIsolate(), s_result,  
        v8::NewStringType::kNormal).ToLocalChecked();  
    args.GetReturnValue().Set(v_result);  
  }  
  printf("\n");  
  fflush(stdout);  
}  
v8::Local<v8::ObjectTemplate> global = v8::ObjectTemplate::New(isolate);  
  // Bind the global 'print' function to the C++ Print callback.  
  global->Set(  
      v8::String::NewFromUtf8(isolate, "print", v8::NewStringType::kNormal)  
          .ToLocalChecked(),  
      v8::FunctionTemplate::New(isolate, Print));  
Local<Context> context = v8::Context::New(isolate, NULL, global);

Isolate *isolate = args.GetIsolate();
Local<Object> opts = args[0]->ToObject();
Local<Number> mode = opts->Get(String::NewFromUtf8(isolate, "mode"))->ToNumber(isolate);
static void DeleteInstance(void* data) {
  // 将 `data` 转换为该类的实例并删除它。
}
node::AddEnvironmentCleanupHook(DeleteInstance) //在销毁环境之后被删除
JS调用C++函数，就是通过FunctionTemplate和ObjectTemplate进行扩展的。
V8的External就是专门用来封装（Wrap）和解封(UnWrap)C++指针的

V8_EXPORT
V8_INLINE
v8::Handle<
v8::Local<
const v8::Arguments
const v8::FunctionCallbackInfo<v8::Value>& 不定参数
Local<FunctionTemplate> tpl = FunctionTemplate::New(isolate);
G
String::NewFromUtf8Literal(isolate, "isNull")
String::Cast
isolate->GetCurrentContext()
NODE_SET_PROTOTYPE_METHOD(tpl, "x", X);

https://github.com/alibaba/jsni.git

nodeqt

const qt = require("./lib/qt");
const app = new qt.QApplication();
const window = new qt.QMainWindow();
const box = new qt.QWidget();
box.setStyleSheet("background-color:red;");
box.resize(300, 300);
box.move(300, 300);
box.setParent(window);
window.resizeEvent((width, height) => {
  console.log("Resized1", width, height);
  console.log(width, height);
});
window.closeEvent(() => {
  console.log("Closing");
});
box.resizeEvent((width, height) => {
  console.log("Resized2", width, height);
});
box.mousePressEvent(() => console.log("CLICKED!"));
box.mouseReleaseEvent(() => console.log("UNCLICKED!"));
box.setMouseTracking(true);
box.mouseMoveEvent((x, y) => console.log(`MOUSE MOVED! x: ${x} y: ${y}`));
box.enterEvent(() => console.log("MOUSE ENTERED!"));
box.leaveEvent(() => console.log("MOUSE LEFT!"));
const label = new qt.QLabel(box);
console.log("Size hint", label.sizeHint());
console.log("Height", label.height());
label.setText('<span style="">dsawewwww<span style="">Hello2</span></span>');
label.adjustSize();
const label2 = new qt.QLabel(window);
const pix = new qt.QPixmap();
pix.load("/home/kusti8/Pictures/test_small.jpg");
pix.scaled(300, 300, qt.AspectRatioMode.IgnoreAspectRatio);
label2.setPixmap(pix);
label2.adjustSize();
label2.setStyleSheet("background-color: red;");
label2.move(300, 600);
label2.setScaledContents(false);
label2.setAlignment(qt.Alignment.AlignCenter);
label2.show();
const lineedit = new qt.QLineEdit(window);
lineedit.move(100, 100);
lineedit.textChangedEvent(text => console.log("text changed", text));
lineedit.show();
const combobox = new qt.QComboBox(window);
combobox.currentTextChangedEvent(text => console.log("New combo", text));
combobox.setEditable(true);
combobox.addItem("Test1");
combobox.addItem("Test2");
combobox.addItem("Test3");
box.show();
box.clear();
console.log("set parent");
window.show();
console.log("set parent");
app.aboutToQuitEvent(() => console.log("Quitting"));
console.log("Height", label.height());
console.log(qt.desktopSize());
app.exec();

GitHub - arturadib/node-qt: C++ Qt bindings for Node.js

mirrors_CoderPuppy/node-qt

GitHub - anak10thn/node-qt5

GitHub - NickCis/nodeQt: Qt binding for Node

GitHub - a7ul/mdview-nodegui: A Markdown editor in NodeGui

GitHub - kusti8/node-qt-napi: Node.js bindinds for Qt5, using NAPI

GitHub - nodegui/qode: DEPRECATED: Please see https://github.com/nodegui/qodejs instead

GitHub - svalaskevicius/qtjs-generator: Qt API bindings generator for Node.js

C++ 插件 | Node.js v22 文档

GitHub - nodegui/nodegui-starter: A starter repo for NodeGui projects

GitHub - anak10thn/qhttpserver: HTTP server implementation for Qt based on node.js' http parser

GitHub - anak10thn/chrome-app-samples: Chrome Apps

GitHub - magne4000/node-qtdatastream: Nodejs lib which can read/write Qt formatted Datastreams

GitHub - fwestrom/qtort-microservices: A simple micro-services framework for Node.js.

GitHub - ivan770/PiQture: Screenshot tool based on Electron

GitHub - miskun/qtc-sdk-node: Qt Cloud Services SDK for Node.js

v8: include/v8.h File Reference

nodegyp

node-gyp -j 8 configure
node-gyp -j 8 build
"install": "node-gyp -j 8 rebuild --arch=ia32"
"install": "node-gyp -j 8 rebuild --arch=x86"

https://github.com/kusti8/node-qt-napi/releases/download/0.0.4/qt-v0.0.4-4-win32-x64.tar.gz

工程搭建方式

gyp文件样例

TortoiseGit bash使用

set PRJ_PATH=E:\workspace\test\Web-Dev-For-Beginners\nodeqt
TortoiseGitProc.exe /command:commit /path:"%PRJ_PATH%\nodegyp" /logmsgfile:"%PRJ_PATH%\refModify.txt"  /bugid:1 /closeonend:2%
TortoiseGitProc.exe /command:pull /path:"%PRJ_PATH%\nodegyp" /closeonend:2
TortoiseGitProc.exe /command:push /path:"%PRJ_PATH%\nodegyp" /closeonend:2
pause

GitHub - electron/electron-api-demos: Explore the Electron APIsExplore the Electron APIs. Contribute to electron/electron-api-demos development by creating an account on GitHub.https://github.com/electron/electron-api-demos Quick Start | ElectronThis guide will step you through the process of creating a barebones Hello World app in Electron, similar to electron/electron-quick-start.https://electronjs.org/docs/tutorial/quick-start https://github.com/electron/electron-quick-starthttps://github.com/electron/electron-quick-start GitHub - qtoolkit/qtk: QTK 是一套基于HTML5 Canvas实现的, 专注于桌面/移动应用程序开发的框架。