简介：本项目旨在开发一个能够为元素动态添加行号的功能插件，增强文本编辑体验。 为了在原始的HTML页面中的textarea框加入行号，并替代一些复杂的文本编辑器的功能，可以按照以下步骤进行： 1. 创建一个包含textarea元素的基本HTML结构。 2. 使用JavaScript来读取textarea的内容并计算每一行的位置。 3. 动态生成显示每行数字的标签（例如使用`<span>`或`<div>`），并将这些标签放在每个对应的文本内容之前。 这种方法可以简化用户界面，让代码更易于阅读和维护。通过这种方式实现的功能比一些复杂的编辑器更加轻量级且更适合简单的文本输入需求。 </p></div> </div> <div data-v-88f98792="" class="w-full p-5 mb-3 bg-white border border-gray-200 rounded-lg dark:bg-gray-800 dark:border-gray-700"> <div class="flex justify-center items-center mt-14 mb-7 text-gray-500 relative"><h2>全部评论 (<span>0</span>)</h2></div> <div class="w-full px-5 py-10 mb-3 bg-white border border-gray-200 rounded-lg dark:bg-gray-800 dark:border-gray-700"> <div class="flex items-center mt-10 mb-5 justify-center text-gray-400">还没有任何评论哟~</div> </div> </div> </div> <aside data-v-88f98792="" class="col-span-4 md:col-span-1 animate__animated animate__fadeInUp"> <div data-v-88f98792="" class="sticky top-[5.5rem]"> <div data-v-88f98792="" class="w-full py-5 px-2 mb-3 bg-white border 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class="activity-image"><img data-v-0e1787d0="" src="http://d.itadn.com/seoassets/activecustomer-98ac7d5d.png" alt="客服" class="top-image"><img data-v-0e1787d0="" src="http://d.itadn.com/seoassets/close-5242d789.png" alt="关闭" class="top-right-close" style="width:40px"></div> </div> </div> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>为</span><span style=color: #f73131>textarea</span><span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span>" href="https://d.itadn.com/i0_63635669691/B/749420" target="_blank"><span style=color: #f73131>为</span><span style=color: #f73131>textarea</span><span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本项目旨在开发一个能够为<textarea>元素动态添加行号的功能插件，增强文本编辑体验。 为了在原始的HTML页面中的textarea框加入行号，并替代一些复杂的文本编辑器的功能，可以按照以下步骤进行： 1. 创建一个包含textarea元素的基本HTML结构。 2. 使用JavaScript来读取textarea的内容并计算每一行的位置。 3. 动态生成显示每行数字的标签（例如使用`<span>`或`<div>`），并将这些标签放在每个对应的文本内容之前。 这种方法可以简化用户界面，让代码更易于阅读和维护。通过这种方式实现的功能比一些复杂的编辑器更加轻量级且更适合简单的文本输入需求。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>为</span> RichTextBox <span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span>" href="https://d.itadn.com/i0_47502273581/B/956631" target="_blank"><span style=color: #f73131>为</span> RichTextBox <span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本文介绍如何在RichTextBox控件中实现显示行号的功能，适用于需要编辑多行文本且希望每行都有编号的用户界面设计场景。 RichTextBox增加行号功能可以彻底解决行号Y坐标不精确的问题。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>为</span>datetimepicker<span style=color: #f73131>添</span><span style=color: #f73131>加</span>清空<span style=color: #f73131>功</span><span style=color: #f73131>能</span>" href="https://d.itadn.com/i0_11326896058/B/743664" target="_blank"><span style=color: #f73131>为</span>datetimepicker<span style=color: #f73131>添</span><span style=color: #f73131>加</span>清空<span style=color: #f73131>功</span><span style=color: #f73131>能</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本教程详细介绍了如何为datetimepicker插件增加一键清空已选日期和时间的功能，并提供了代码示例。 我修改了源代码，将“今日”改为清空操作，但这不一定符合所有需求。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="具有自动<span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span>的RichTextBox程序" href="https://d.itadn.com/i0_78751774975/B/956625" target="_blank">具有自动<span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span>的RichTextBox程序</a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 简介：这款RichTextBox程序具备自动为文本添加行号的功能，极大地方便了程序员、作家等用户群体在编辑长篇文档时对代码或文字进行有效管理与定位。 一个自动为RichTextBox添加行号的程序，非常好用。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="DataGridView中<span style=color: #f73131>为</span>每<span style=color: #f73131>行</span>前<span style=color: #f73131>添</span><span style=color: #f73131>加</span>序<span style=color: #f73131>号</span>" href="https://d.itadn.com/i0_58659550951/B/579886" target="_blank">DataGridView中<span style=color: #f73131>为</span>每<span style=color: #f73131>行</span>前<span style=color: #f73131>添</span><span style=color: #f73131>加</span>序<span style=color: #f73131>号</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本教程详细介绍了如何在Windows Forms应用程序中的DataGridView控件每一行之前自动插入序号，帮助开发者实现更清晰的数据展示。 在代码里设置，在DataGridView每行前面添加序号。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="JS实现<span style=color: #f73131>添</span><span style=color: #f73131>加</span>和删除<span style=color: #f73131>行</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span>，每<span style=color: #f73131>行</span>可继续<span style=color: #f73131>添</span><span style=color: #f73131>加</span>子<span style=color: #f73131>行</span>，序<span style=color: #f73131>号</span>自动调整" href="https://d.itadn.com/i0_70870709505/B/688944" target="_blank">JS实现<span style=color: #f73131>添</span><span style=color: #f73131>加</span>和删除<span style=color: #f73131>行</span><span style=color: #f73131>功</span><span style=color: #f73131>能</span>，每<span style=color: #f73131>行</span>可继续<span style=color: #f73131>添</span><span style=color: #f73131>加</span>子<span style=color: #f73131>行</span>，序<span style=color: #f73131>号</span>自动调整</a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本工具采用JavaScript编写，支持动态增删表格行，并允许每一行递归添加子行。系统将智能更新所有项目的排序编号。 该功能具备tab切换效果，并通过JavaScript实现自动添加或删除一行的功能。在进行添加或删除操作时，序号会自动更新。每一行的后面都有一个用于添加新行的按钮，点击后会在当前行下面插入新的一行。新的输入框生成后，在用户离开文本框（即完成编辑）时，其中的内容将被固定下来并显示出来。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>为</span>SurfaceView<span style=color: #f73131>添</span><span style=color: #f73131>加</span>缩放视频<span style=color: #f73131>功</span><span style=color: #f73131>能</span>" href="https://d.itadn.com/i0_90114310621/B/29874" target="_blank"><span style=color: #f73131>为</span>SurfaceView<span style=color: #f73131>添</span><span style=color: #f73131>加</span>缩放视频<span style=color: #f73131>功</span><span style=color: #f73131>能</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本项目专注于在Android应用开发中，实现为SurfaceView组件添加视频缩放功能的技术细节和解决方案。通过调整视频显示比例，使画面完美适应不同尺寸屏幕，改善用户体验。 在SurfaceViewDemo的基础上增加放大和缩小视频的功能。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>为</span>SurfaceView<span style=color: #f73131>添</span><span style=color: #f73131>加</span>缩放视频<span style=color: #f73131>功</span><span style=color: #f73131>能</span>" href="https://d.itadn.com/i0_54950341668/B/622790" target="_blank"><span style=color: #f73131>为</span>SurfaceView<span style=color: #f73131>添</span><span style=color: #f73131>加</span>缩放视频<span style=color: #f73131>功</span><span style=color: #f73131>能</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本文将详细介绍如何在SurfaceView上实现视频的缩放功能，使视频内容能够适应不同屏幕尺寸和比例的需求。 在SurfaceViewDemo的基础上增加放大和缩小视频的功能。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="DBGridEH<span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span>" href="https://d.itadn.com/i0_13702541461/B/1282222" target="_blank">DBGridEH<span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>行</span><span style=color: #f73131>号</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本教程介绍如何在Delphi的DBGrid控件中添加行号功能，帮助用户更方便地识别和操作数据记录。 本段落将对Delphi 67中DBGridEH添加行号的相关知识点进行详细解析。文中主要涉及的代码片段展示了如何在DBGridEH控件中为每一行添加行号，以及如何处理列宽调整等操作。 ### DBGridEH控件简介 DBGridEH 是一个增强版本的 Delphi DBGrid 控件，可以提供更强大的功能，如自定义绘制、数据排序等。本段落重点关注的是如何在 DBGridEH 中添加行号。 ### 添加行号的方法 #### 代码解析 ```pascal procedure DrawIndicatorCell(ARow: Integer; LineNo: string); ``` 该过程负责绘制行号单元格。参数 `ARow` 表示当前行的位置索引，而 `LineNo` 表示要显示的行号字符串。 1. **确定绘制范围**： - 首先获取行号所在单元格的矩形区域 `TitleRect`。 - 设置字体和颜色：这里使用了绿色作为行号的字体颜色，背景色则使用了第一列标题的背景颜色。 - 调整 `TitleRect` 的大小，使其与网格线对齐。 2. **绘制行号按钮（可选）**： - 如果单元格的高度大于滚动条的高度，则创建一个按钮矩形 `ButtonRect`。 - 绘制按钮背景，并在按钮上绘制边框。 3. **写入行号文本**： - 使用 `WriteText` 函数在 `TextRect` 区域内居左对齐的方式写入行号 `LineNo`。 4. **绘制网格线**： - 如果设置了行线和列线，则在 `TitleRect` 边缘绘制边框，使行号单元格看起来更加清晰。 #### 关键代码解读 ```pascal if ARow < 0 then Exit; TitleRect := CellRect(0, ARow + 1); 获取行号单元格的矩形 Canvas.Font := Columns[0].Title.Font; 设置字体 Canvas.Font.Color := clGreen; 设置字体颜色 Canvas.Brush.Color := Columns[0].Title.Color; 设置背景颜色 ``` 这里通过 `CellRect` 函数获取行号单元格的矩形区域，并设置了字体样式和颜色。需要注意的是，由于行号通常出现在第一列，因此这里的列索引为 `0`。 ```pascal WriteText(Canvas, TextRect, 1, 1, LineNo, taLeftJustify); 写入行号文本 ``` `WriteText` 函数用于将行号写入指定的矩形区域内，其中 `taLeftJustify` 参数表示文本居左对齐。 ### 列宽调整逻辑 另一段代码展示了如何处理列宽调整的情况： ```pascal if Value <> PIntArray(FColWidths)^[Index + 1] then begin if (Index = 0) and (Value < 12) then Value := 35; end; ``` 这段代码检查新的列宽度 `Value` 是否与当前的列宽度不同，如果第一列的宽度小于 12，则将其设置为 35。这可能是为了确保行号有足够的空间显示而不被截断。 ### 总结 通过上述分析，我们可以了解到 DBGridEH 在 Delphi 67 中如何实现添加行号的功能。关键在于定义一个绘制行号的自定义过程，并在适当的地方调用它来更新行号显示。此外，还涉及到了列宽调整时的一些逻辑处理，以确保行号的显示效果良好。这些技术点对于使用 Delphi 进行数据库界面开发的程序员来说非常有用。 </div><!----> </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div 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0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="SafeRoomDemo: 用SQLCipher<span style=color: #f73131>为</span>Room数据库<span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>加</span>密<span style=color: #f73131>功</span><span style=color: #f73131>能</span>" href="https://d.itadn.com/i0_39488765306/B/830435" target="_blank">SafeRoomDemo: 用SQLCipher<span style=color: #f73131>为</span>Room数据库<span style=color: #f73131>添</span><span style=color: #f73131>加</span><span style=color: #f73131>加</span>密<span style=color: #f73131>功</span><span style=color: #f73131>能</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 简介：SafeRoomDemo是一款基于Android平台的示例项目，展示如何运用SQLCipher库为Room数据库实现数据加密，从而提升应用的数据安全性。 SafeRoomDemo使用SQLCipher对Room的数据库进行加密。 </div><!----> </div> </li> </body> </html>
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