Flutter development practice-hero implements image preview function extend_image In development, we often encounter the need for image preview. When you click on an image in the feed, the preview will be opened. Multiple images can be switched left and right with swiper, and double-click the image and perform gestures to zoom. This main implementation uses […]
Tag: preview
ASP.NET Core updates in .NET 8 Preview 1
Table of Contents Full stack web UI using Blazor Improved authentication and authorization experience Native AOT ASP.NET Core Roadmap for .NET 8 What’s new in .NET 8 Preview 1? start Upgrade an existing project routing tools Routing constraint performance improvements New analyzer for API development It is recommended to set or append to the title […]
Front-end pdf preview solution (positioning, highlighting, page switching, style customization)
Foreword PDF.js is an open source JavaScript library developed by Mozilla for parsing and rendering PDF files on web pages. It does not rely on any external servers or plug-ins and runs directly in the browser. PDF.js supports multiple platforms and devices, including desktop, mobile, and embedded Environment: browser side Technology selection: pdf.js Download address: […]
Rough component packaging based on Ant Design of Vue-picture preview
Requirements The picture list is displayed, and you can click on the picture to jump out of the preview mode, and you can directly switch to view. Analysis To display pictures in list form, you can use antd Vue’s List component and Card card. Click-to-preview of images can use the third-party image preview component viewerjs […]
vue uses pdf-dist to implement pdf preview and watermark
vue uses pdf-dist to implement pdf preview and watermark 1. Use the pdf-dist plug-in to convert PDF files into canvas images npm install pdf-dist 2. Introducing plug-ins into the page const pdfJS = require(“pdfjs-dist”); pdfJS.GlobalWorkerOptions.workerSrc = require(“pdfjs-dist/build/pdf.worker.entry”); 3. Rendering PDF // Render the corresponding PDF based on the page number renderPage(num) {<!– –> this.renderingPage = […]
Android uses CameraX to implement operations such as previewing/photography/recording video/image analysis/focusing/zooming/switching cameras.
1. CameraX architecture See official documentation CameraX architecture There is the following passage Using CameraX, you interact with your device’s camera with the help of abstract concepts called “use cases.” Preview: Accepts a Surface used to display previews, such as PreviewView Image Analysis : Provides a CPU-accessible buffer for analysis (e.g. machine learning) Picture Capture […]
Vue3 implements file preview in Word, Excel, PDF, pictures, videos and other formats!!!!
First the renderings Plug-in installation First let’s talk about the word file which is the docx-preview plug-in The excel file uses the xlsx plug-in Introducing the data returned by the backend Because the data is processed at the interceptor, the data you finally get when calling the interface is an object, which contains: url: Temporary […]
Gstreamer implements rtsp streaming, preview, and dynamic recording
#include <gst/gst.h> #include <stdio.h> #include <linux/input.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <stdlib.h> #define MAX_PIPELINE_CNT 1 #define MAX_INPUT_SIZE 128 #define GSTCAM_INFO(fmt, args…) do { \ g_print(“[INFO] %s %d:” fmt, __FUNCTION__, __LINE__, ##args); \ } while (0) #define GSTCAM_ERROR(fmt, args…) do { \ g_print(“[ERROR] %s %d:” fmt, __FUNCTION__, __LINE__, ##args); \ } while (0) #define […]
PDF file online preview
Install vue-pdf npm install vue-pdf Introduced in vue page import pdf from ‘vue-pdf’; components: {pdf}, Used in vue page <el-button size=”mini” type=”text” icon=”el-icon-edit” @click=”handlePreview(scope.row)” >Preview</el-button> pdfUrl:”, src:”, pdfPreviewDialog:false, numPages:100, currentPage:1, handlePreview(row){ this.pdfUrl=this.baseUrl + row.pdfPath; this.src=pdf.createLoadingTask(this.pdfUrl); this.pdfPreviewDialog=true; this.src.promise.then(pdf => { this.numPages = pdf.numPages; }); }, <el-dialog :visible.sync=”pdfPreviewDialog” title=”Resume” width=”50%” center> <div> <button @click=”$refs.pdf.print()”>Print</button> <pdf :src=”src” style=”width:100%” […]
Gstreamer implements preview and dynamic recording
The goal is to be able to enter the recording command in the command line during preview to record. The code is as follows: #include <gst/gst.h> #include <stdio.h> #include <linux/input.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <stdlib.h> static gboolean bus_call (GstBus * bus, GstMessage * msg, gpointer data) { GMainLoop *loop = (GMainLoop *) […]