position

CSS(8)---通俗讲解定位(position)

由 大城市里の小女人 提交于 2019-12-05 05:20:27
CSS(8)---通俗讲解定位(position) CSS有三种基本的定位机制: 普通流 、 浮动 、 定位 。前面两个之前已经讲过，详见博客： 1、 CSS(5)---通俗讲解盒子模型 2、 CSS(6)---通俗讲解浮动(float) 3、 CSS(7)--- 通俗讲解清除浮动 一、为什么要用定位？ 如果说浮动关键在一个 “浮” 字上面， 那么 我们的定位，关键在于一个 “位” 上。 我们来思考下定位用于的场景。 1、打Log标签 比如你想在商品的图片想打个标签比如：包邮、最新上架等等。 怎么做比较好呢，如果你要粗暴那就直接ps在图片上添加标签。只是这样有个很大的弊端，比如你要添加新标签你需要重现修图，比如商品之前包邮后面不包邮了， 那你又需要重新p图。这样肯定是不合适的。那怎么做比较合适？ 其实很简单，将商品图片和标签的标签分开来。然后通过css在商品图片上添加标签。这个时候通常会定位去完成。 2、切换Banner 有些商城的首页都会有个Banner，这里 左右的箭头 和 下面的小点点 一般也是用定位来做。 3、广告位窗口 有些位置在左右侧会有固定的广告窗口，不论怎么滑动页面这个广告窗口都是在固定位置 这个就需要用到固定定位了。 二、定位概念 1、定位的分类 在CSS中， position 属性用于定义元素的定位模式，其基本语法格式如下： 选择器 {position:属性值;

Unity 计算子节点位置

由 大憨熊 提交于 2019-12-05 04:43:37
根据父节点计算子节点位置，实现类似挂在父节点下效果，未实现缩放 using UnityEngine; public class Test : MonoBehaviour { public Transform m_Father; public Transform m_Child; Vector3 m_OffestPos; Quaternion m_ChildOriRotation; Quaternion m_FatherOriRotation; void Start () { m_OffestPos = m_Child.position - m_Father.position; m_ChildOriRotation = m_Child.rotation; m_FatherOriRotation = m_Father.rotation; } void Update () { var deltaRotation = m_Father.rotation * Quaternion.Inverse(m_FatherOriRotation); m_Child.position = m_Father.position + deltaRotation * m_OffestPos; m_Child.rotation = deltaRotation * m_ChildOriRotation; } }

Putting an arrow (marker) at specific point on a path when using the d3 javascript library

由 瘦欲@ 提交于 2019-12-05 03:06:55
I am working currently on a graph visualization and I use SVG and the D3 library. I was asked by our designer if I can put the arrowheads of the edges of the graph on a position corresponding to 80% of length of the lines. I was able to achieve the first part - getting the position - by using the getPointAtLength method. var svg = d3.select("body").append("svg") .attr("width", 960) .attr("height", 500) var path = svg.append("path") .attr("d", "M20,20C400,20,20,400,400,400") .attr("fill", "none") .attr("stroke", "black"); var pathEl = path.node(); var pathLength = pathEl.getTotalLength(); var

How can I split a table vertically into two tables in XSL?

由 淺唱寂寞╮ 提交于 2019-12-05 02:56:01
问题 If I have the following table: <table> <tr><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td></tr> <tr><td>A</td><td>B</td><td>C</td><td>D</td><td>E</td><td>F</td></tr> </table> How would I split this in XSLT so that I end up with the following: <table> <tr><td>1</td><td>2</td><td>3</td></tr> <tr><td>A</td><td>B</td><td>C</td></tr> </table> <table> <tr><td>4</td><td>5</td><td>6</td></tr> <tr><td>D</td><td>E</td><td>F</td></tr> </table> I am interested in a generalized method, where

css之position

由 末鹿安然 提交于 2019-12-05 02:39:04
在我之前的认知中，position值有static(默认)、relative(相对)、absolute(绝对)、fixed(固定不变) 这四个值大家了解css的都是知道的我就不多说，这里要说的是sticky(粘性)，sticky是17年浏览器才开始支持的，它会产生动态效果，很像 relative 和 fixed 的结合：一些时候是 relative 定位（定位基点是自身默认位置），另一些时候自动变成 fixed 定位（定位基点是视口）。 sticky 生效的前提是，必须搭配 top 、 bottom 、 left 、 right 这四个属性一起使用，不能省略，否则等同于 relative 定位，不产生"动态固定"的效果。原因是这四个属性用来定义"偏移距离"，浏览器把它当作 sticky 的生效门槛。 它的具体规则是，当页面滚动，父元素开始脱离视口时（即部分不可见），只要与 sticky 元素的距离达到生效门槛， relative 定位自动切换为 fixed 定位；等到父元素完全脱离视口时（即完全不可见）， fixed 定位自动切换回 relative 定位。 要实现效果只需要简单css {position:sticky;top:0;} 参考链接 http://www.ruanyifeng.com/blog/2019/11/css-position.html 来源： https:/

Position Sticky with overflow-x set for parent div

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-05 02:13:45
问题 I am trying to do a sticky header with position: sticky style. The problem with position sticky is it wont work, if the parent container has some overflow set. But, in my case, I have a horizontal scroll. Since, I am putting a scroll for parent container ( overflow-x), the sticky is not working. JSBin Link .sticky { position: sticky; top: 10px; z-index: 1; } In the example given you can see that, first block sticky is not working (because I have set overflow-x). But, it is working for the

Simulate mouse clicks at a certain position on inactive window in Java?

由 ぃ、小莉子 提交于 2019-12-05 02:05:02
问题 Anyways, I'm building a bot to run in the background. This bot requires me to click. Of course, I want to be able to do other things while the bot is running. So I was wondering if it was possible for me to simulate a mouse click at a certain position on an inactive window. If this is possible, I would greatly appreciate it if any of you could help me. 回答1: java.awt.Robot Clicking into an active window is going to activate it, though. 来源： https://stackoverflow.com/questions/6497825/simulate

Perl - regex - Position of first nonmatching character

由 柔情痞子 提交于 2019-12-05 01:43:19
问题 I want to find the position in a string, where a regular expression stops matching. Simple example: my $x = 'abcdefghijklmnopqrstuvwxyz'; $x =~ /gho/; This example shall give me the position of the character 'h' because 'h' matches and 'o' is the first nonmatching character. I thought of using pos or $- but it is not written on unsuccessful match. Another solution would be to iteratively shorten the regex pattern until it matches but that's very ugly and doesn't work on complex patterns. EDIT

Tricky css/javascript floating task

由 為{幸葍}努か 提交于 2019-12-05 01:41:50
问题 I have a design that has several divs at varying widths/heights and I need them to float essentially to the top left. A simple css float:left will not work because it does not take advantage of the vertical space once it drops to a new line. I assume I will need to use jQuery to dynamically position each div but I was hoping someone could lead me in the right direction. This is what a standard float left would do: standard float http://www.media1designs.com/poc/superfloat/diagram_float_left

how to fix axes position by using set_position method in python matplotlib?

由 …衆ロ難τιáo~ 提交于 2019-12-05 01:29:48
I think this is quite easy but I searched the internet and matplotlib users mailing list and not able to find an answer. ax2 is an inset axes within the "ax" axes in figure "fig", which I make by following here: http://matplotlib.sourceforge.net/examples/pylab_examples/axes_demo.html but now my problem is that I cannot fix the ax2 the exact position I want, it seems that draw() command change this: In [352]: ax2.set_position([0.125,0.63,0.25,0.25]) In [353]: ax2.get_position() Out[353]: Bbox(array([[ 0.125, 0.63 ], [ 0.375, 0.88 ]])) In [354]: draw() In [355]: ax2.get_position() Out[355]: Bbox
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