对接完毕下单

electron/main.js

@@ -1,4 +1,5 @@
 import { app, BrowserWindow, ipcMain } from "electron";
+import { printUtils } from './printUtils'
 
 app.whenReady().then(() => {
   const win = new BrowserWindow({
@@ -27,13 +28,21 @@ app.whenReady().then(() => {
   app.on("activate", () => {
     // 在 macOS 系统内, 如果没有已开启的应用窗口
     // 点击托盘图标时通常会重新创建一个新窗口
-    if (BrowserWindow.getAllWindows().length === 0) createWindow();
+    if (BrowserWindow.getAllWindows().length === 0) {
+      createWindow()
+    };
   });
 
   ipcMain.on("quitHandler", (_, msg) => {
-    console.log(msg);
     app.quit();
   });
+
+  ipcMain.on('printerInfoSync', async (event, params) => {
+    console.log('接收到打印消息', params)
+    const res = await printUtils(params)
+    event.returnValue = res
+    console.log('已打印', res)
+  })
 });
 
 app.on("window-all-closed", () => {

electron/printUtils.js

@@ -0,0 +1,63 @@
+import { BrowserWindow, ipcMain } from 'electron';
+import path from "path";
+
+
+export function printUtils(data) {
+    return new Promise(async (resolvePrint, rejectPrint) => {
+
+        let subMainWindow = new BrowserWindow({
+            show: false,
+            webPreferences: {
+                nodeIntegration: true,        // For electron >= 4.0.0
+                contextIsolation: false,
+                webSecurity: false,
+                enableRemoteModule: true
+            }
+        });
+
+        function renderPrintDocument(window, data) {
+            return new Promise(async (resolve, reject) => {
+                ipcMain.on('load-ok', (event, res) => {
+                    //在这里可以添加打印的判断条件等......
+                    setTimeout(() => {
+                        resolve({ message: 'page-rendered', ...res });
+                    }, 500)
+                })
+            })
+        }
+
+
+        // If the subMainWindow is closed, reset the `subMainWindow` var to null
+        subMainWindow.on('closed', () => {
+            subMainWindow = null;
+        });
+        // 加载打印的html文件
+        subMainWindow.loadFile(path.resolve(__dirname, "./public/print.html"));
+
+        subMainWindow.webContents.on('did-finish-load', async (res) => {
+            let data = []
+            return renderPrintDocument(subMainWindow, data)
+                .then(async (result) => {
+                    // let width = Math.ceil((result.width) * 264.5833);
+                    let height = Math.ceil((result.height + 60) * 264.5833);
+                    console.info('height', result, height);
+                    subMainWindow.webContents.print({
+                        silent: true,
+                        margins: {
+                            marginType: 'none'
+                        },
+                        printBackground: false,
+                        deviceName: options.printerName,
+                        copies: 1,
+                    }, (success) => {
+
+                        if (success) {
+                            resolvePrint({ type: 'success' })
+                        }
+                        subMainWindow.close();
+                    })
+                })
+                .catch(err => console.warn(33, err))
+        })
+    })
+}