padding | 易学教程

CSS3 Box-sizing的理解

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box-sizing 是 CSS3 的box属性之一。一说到CSS的盒模型（ Box model ）我想很多人都会比较烦，特别是对于新手，然而这个 Box model 又是我们CSS运用中比较重要的一个属性。那么 CSS3 的 Box-sizing 跟盒模型有什么关系呢？第一句话就说了，Box-sizing是 CSS3 的Box属性之一，那他当然也遵循CSS的 Box model 原理，为了能更好的学习和理解这个 Box-sizing 属性，我们有必要先了解一下CSS中 Box model 的原理。 CSS中B ox model 是分为两种，第一种是 W3C 的标准模型，另一种是IE的传统模型，他们相同之处都是对元素计算尺寸的模型，具体说就是对元素的width,height,padding,border以及元素实际尺寸的计算关系；他们不同之处呢？两者的计算方法不一至： 1、W3C的标准Box Model: /盒尺寸计算（元素空间尺寸） Element空间高度 = content height + padding + border + margin Element 空间宽度 = content width + padding + border + margin /盒尺寸计算（元素大小） Element Height = content height + padding +

How to perform unpadding after decryption of stream using CryptoPP

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I've got the stream to decrypt. I divide it into blocks and pass each block to the method below. The data I need to decrypt is encrypted by 16 - bytes blocks and if the last block is less than 16, then all the rest bytes are filled by padding. Then in the moment of decryption I'm getting my last block result as the value including these additional padding bytes. How can I determine the length of original data and return only it or determine the padding bytes and remove them, considering different paddings could be used? void SymmetricAlgorithm::Decrypt(byte* buffer, size_t dataBytesSize) {

How can we change the width/padding of a Flutter DropdownMenuItem in a Dropdown?

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问题 In Flutter, I can build a Dropdown with DropdownMenuItems, like this: The DropdownMenuItems I add are always wider than the dropdown itself: How do you adjust the width of the DropdownMenuItem, or remove the extra horizontal padding? My DropdownMenuItem widget looks like this: DropdownMenuItem( value: unit.name, child: Text('hey'), ); while my Dropdown widget looks like this: return Container( width: 300.0, child: DropdownButtonHideUnderline( child: DropdownButton( value: name, items:

Win7 Ubuntu13.04互通（win7下用vbox安装Ubuntu）

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VirtualBox设置 采用的是Bridge+host方式 <a href="http://static.oschina.net/uploads/img/201310/11213732_gHMq.jpg"><img style="background-image: none; border-bottom: 0px; border-left: 0px; padding-left: 0px; padding-right: 0px; display: inline; border-top: 0px; border-right: 0px; padding-top: 0px" title="clip_image002" border="0" alt="clip_image002" src="http://static.oschina.net/uploads/img/201310/11213733_PwKc.jpg" width="433" height="297" /></a> <a href="http://static.oschina.net/uploads/img/201310/11213733_0QtD.jpg"><img style="background-image: none; border-bottom: 0px;

Libgdx Scene2d - Set actor ( TextField ) padding?

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问题 i have been having trouble setting padding or something similar to an actor. Cant figure out the way. I guess that I must add something in the skin maybe? I have this TextField: textboxskin = new Skin(); textboxskin.add("textfieldback", new Texture("data/textfieldback.png")); textboxskin.add("cursor", new Texture("data/cursortextfield.png")); textboxskin.add("selection", new Texture("data/selection.png")); textboxskin.add("font", font); TextFieldStyle textfieldstyle = new TextFieldStyle();

Padding vs children with margins

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问题 Let's just start with saying I understand the box model. Throughout my short time as a developer, I've tried to stick very closely to semantic html and use responsive design practices. I recently got a job at a new company as Jr. Developer, and my Sr. is religiously against padding. Like he doesn't want it used in any case whatsoever. He wants me to use set heights and widths on everything, and if I need to simulate padding, I have to add a child div using margins. For example: <div class=

Removing TextInputLayout extra top padding

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问题 TextInputLayout seems to always have some extra padding at the top (no matter that all margins/paddings are set to 0): The layout looks like: <android.support.design.widget.TextInputLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <android.support.v7.widget.AppCompatEditText android:id="@+id/txt_amount" style="@style/EditTextStyle" android:hint="@string/hint_amount" android:inputType="numberDecimal"/> </android.support.design.widget.TextInputLayout> How to

overflow: hidden behind padding

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问题 Is it possible to define where overflow: hidden begins based on padding? For example, I currently have a table in which I have a long string. There is padding on the left, but the length of the string exceeds the td, so overtflow hidden is triggered. I would like the overflow: hidden to trigger at the beginning of the padding rather than the end of the td. Essentially I would like the overflow: hidden to begin at the start of the far right red line. .order-table td { padding: 1em 3px; border

How to add padding on to a byte array?

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问题 I have this 40 bit key in a byteArray of size 8 , and I want to add 0 padding to it until it becomes 56 bit . byte[] aKey = new byte [8]; // How I instantiated my byte array Any ideas how? 回答1: An 8 byte array is of 64 bits. If you initialize the array as byte[] aKey = new byte [8] all bytes are initialized with 0's. If you set the first 40 bits, that is 5 bytes, then your other 3 bytes, i.e, from 41 to 64 bits are still set to 0. So, you have by default from 41st bit to 56th bit set to 0 and

jquery学习7_特殊属性操作

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jquery学习7_特殊属性操作 value属性 // 设置input和textarea //设置值 $("#name").val(“张三”); //获取值 $("#name").val(); text方法 // 相当于innerHTML text方法相当于innerText // 设置内容 $(“div”).html(“这是一段内容”); //获取内容 $(“div”).html() // 设置内容 $(“div”).text(“这是一段内容”); //获取内容 $(“div”).text() width方法与height方法 // 通过css获取 $(“img”).css("width") //带参数表示设置高度 $(“img”).height(200); //不带参数获取高度 $(“img”).height(); //获取可视区宽度 $(window).width(); //获取可视区高度 $(window).height(); // width,innerWidth,outerWidth width：显示显示的宽度 innerWidth=padding+width outerWidth = padding+width+border outerWidth(true) = padding+width+border