更新 pages/index/index.js

pages/index/index.js

@@ -1,3 +1,4 @@
+// index.js
 const bluetooth = require("../../utils/bluetooth.js");
 const PrinterJobs = require("../../utils/printerjobs");
 // 获取应用实例
@@ -11,6 +12,8 @@ Page({
     deviceId: "", // 蓝牙设备id
     serviceId: "", // 蓝牙设备服务id
     characteristicId: "", // 蓝牙设备服务特征值id
+    paperSizes: ["58mm x 30mm", "80mm x 60mm"], // 纸张尺寸选项
+    paperSizeIndex: 0, // 默认选择第一个尺寸
   },
   onLoad(options) {
     if (!wx.openBluetoothAdapter) {
@@ -225,6 +228,7 @@ Page({
   },
   onPrint() {
     let printerJobs = new PrinterJobs();
+    printerJobs.setArea(0, 0, this.getPaperWidth(), this.getPaperHeight());
     printerJobs.println("开始打印了"); // 打印并走纸
     printerJobs
       .setAlign("ct")
@@ -246,6 +250,7 @@ Page({
   },
   onPrintBarCode() {
     let printerJobs = new PrinterJobs();
+    printerJobs.setArea(0, 0, this.getPaperWidth(), this.getPaperHeight());
     printerJobs
       .setAlign("ct")
       .println("打印条形码，内容'0123456789'")
@@ -259,6 +264,7 @@ Page({
   },
   onPrintQrCode() {
     let printerJobs = new PrinterJobs();
+    printerJobs.setArea(0, 0, this.getPaperWidth(), this.getPaperHeight());
     printerJobs
       .setAlign("ct")
       .println("打印二维码，内容'https://www.baidu.com?a=1&b=2'")
@@ -268,6 +274,7 @@ Page({
   },
   onPrintRpeat() {
     let printerJobs = new PrinterJobs();
+    printerJobs.setArea(0, 0, this.getPaperWidth(), this.getPaperHeight());
     let start = printerJobs.getLength();
     printerJobs.setAlign("ct").println("重复内容开始").println("重复内容结束");
     let end = printerJobs.getLength();
@@ -278,8 +285,8 @@ Page({
   onPrintPage() {
     let x = 0; // 打印区域起点横坐标(mm)
     let y = 0; // 打印区域起点纵坐标(mm)
-    let width = 104; // 打印区域宽度(mm)
-    let height = 128; // 打印区域高度(mm)
+    let width = this.getPaperWidth(); // 打印区域宽度(mm)
+    let height = this.getPaperHeight(); // 打印区域高度(mm)
     let printerJobs = new PrinterJobs();
     printerJobs.setMode("page").setArea(x, y, width, height);
     printerJobs.text(
@@ -315,4 +322,23 @@ Page({
       })
       .then((res) => {});
   },
-});
+  handlePaperSizeChange(e) {
+    this.setData({
+      paperSizeIndex: e.detail.value,
+    });
+  },
+  getPaperWidth() {
+    const sizes = {
+      "58mm x 30mm": 58,
+      "80mm x 30mm": 80,
+    };
+    return sizes[this.data.paperSizes[this.data.paperSizeIndex]];
+  },
+  getPaperHeight() {
+    const sizes = {
+      "58mm x 30mm": 30,
+      "80mm x 60mm": 60,
+    };
+    return sizes[this.data.paperSizes[this.data.paperSizeIndex]];
+  },
+});