优化打印效果

electron/main.js

@@ -1,12 +1,11 @@
 import { app, BrowserWindow, ipcMain } from "electron";
 import path from 'path'
-import { printUtils } from './printUtils'
 
 app.whenReady().then(() => {
   const win = new BrowserWindow({
     title: "银收客",
-    width: 1200,
-    height: 800,
+    width: 1024,
+    height: 768,
     fullscreenable: true,
     fullscreen: false,
     simpleFullscreen: true,
@@ -22,10 +21,10 @@ app.whenReady().then(() => {
   if (process.env.VITE_DEV_SERVER_URL) {
     win.loadURL(process.env.VITE_DEV_SERVER_URL);
     // 使用vite开发服务的url路径访问应用
+    // win.webContents.openDevTools();
   } else {
     win.loadFile(path.resolve(__dirname, '../dist/index.html')); // 打包后使用文件路径访问应用
   }
-  win.webContents.openDevTools();
 
   app.on("activate", () => {
     // 在 macOS 系统内, 如果没有已开启的应用窗口
@@ -39,8 +38,36 @@ app.whenReady().then(() => {
     app.quit();
   });
 
-  ipcMain.on('printerInfoSync', async (event, params) => {
-    await printUtils(params)
+  // 创建打印小票子窗口
+  const printWin = new BrowserWindow({
+    show: false,
+    webPreferences: {
+      // 集成网页和 Node.js，也就是在渲染进程中，可以调用 Node.js 方法
+      nodeIntegration: true,
+      contextIsolation: false,
+    }
+  })
+
+  if (process.env.VITE_DEV_SERVER_URL) {
+    // 加载打印的html文件
+    printWin.loadFile(path.join(__dirname, "../public/print.html"));
+  } else {
+    printWin.loadFile(path.resolve(__dirname, '../dist/print.html')); // 打包后使用文件路径访问应用
+  }
+
+  printWin.webContents.openDevTools()
+
+  ipcMain.on('printerInfoSync', (event, params) => {
+    console.log(JSON.parse(params))
+    printWin.webContents.send('getParams', params)
+  })
+
+  // 执行打印操作
+  ipcMain.on('printStart', () => {
+    console.log('开始打印')
+    printWin.webContents.print({
+      silent: true
+    })
   })
 });
 

electron/printUtils.js

@@ -1,54 +0,0 @@
-import { BrowserWindow, ipcMain } from 'electron';
-import path from "path";
-
-export function printUtils(params) {
-    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
-            }
-        });
-
-        // 加载打印的html文件
-        subMainWindow.loadFile(path.join(__dirname, "../public/print.html"));
-
-        subMainWindow.webContents.on('did-finish-load', async (res) => {
-            subMainWindow.webContents.openDevTools();
-            console.log('网页加载完成', res)
-            subMainWindow.webContents.send('getParams', params)
-            return
-            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: '',
-                        copies: 1,
-                    }, (success) => {
-                        if (success) {
-                            resolvePrint({ type: 'success' })
-                        }
-                        subMainWindow.close();
-                    })
-                })
-                .catch(err => console.warn(33, err))
-        })
-        ipcMain.on('printStart', () => {
-            console.log('开始打印')
-            subMainWindow.webContents.print({
-                silent: true
-            })
-        })
-    })
-}