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Multiline Textbox : Display current line/character index in statusbar

由 混江龙づ霸主 提交于 2020-01-05 04:14:08
问题 I have a multiline textbox where the user can edit text. In a statusbar I'd like to show the current line / character index. I know I can get the CaretIndex, and use GetLineIndexFromCharacterIndex to get the line-index. But how would I go about binding that into the statusbar ? 回答1: I'd use an attached behavior for that. The behavior can listens to changes with SelectionChanged and update two attached properties CaretIndex and LineIndex accordingly. <TextBox Name="textBox" AcceptsReturn="True

Get last li on a line jQuery

由 隐身守侯 提交于 2020-01-03 18:15:12
问题 We have a simple ul <ul> <li>some text</li> <li>some some text</li> <li>text more</li> <li>text here</li> </ul> ul { text-align: center; width: 100px; } li { width: auto; display: inline; } So the ul can have several lines. How do I take last li of the each line inside ul ? 回答1: If by last li on the each line of the ul you mean the last li in each ul , then: $('ul li:last-child'); However, if you mean that you have your li 's within the same ul written up on several lines in your source code,

Django实战 （6）—— Admin 管理

由 可紊 提交于 2020-01-03 08:51:36
前文 Django 实战 （1）—— 创建第一个Django项目 Django 实战 （2）—— 视图与 URL 配置 Django 实战 （3）—— Django 是怎么处理请求的？ Django 实战 （4）—— 连接 MySQL Django 实战 （5）—— 数据库操作 Admin 配置 admin 首先，我们需要在 settings.py 文件中增加以下东西 Django 自动管理工具是 django.contrib 的一部分 ， django.contrib是一套庞大的功能集，它是Django基本代码的组成部分 INSTALLED_APPS = [ # 主要是这两个 'django.contrib.admin' , 'django.contrib.auth' , 'django.contrib.contenttypes' , 'django.contrib.sessions' , 'django.contrib.messages' , 'django.contrib.staticfiles' , ] 然后我们需要在 urls.py 中配置一个 admin 的页面，一般是默认打开的 from django . contrib import admin from django . urls import path urlpatterns = [ path ( 'admin/

Java - Do not overwrite with bufferedwriter

由 人盡茶涼 提交于 2020-01-03 08:28:32
问题 I have a program that add persons to an arraylist. What I'm trying to do is add these persons to a text file as well but the program overwrites the first line so the persons get erased. How do I tell the compiler to write at the next free line? import java.io.*; import java.util.*; import javax.swing.JTextArea; public class Logic { File file; FileWriter fw; FileReader fr; BufferedWriter bw; ArrayList<Person> person; public Logic() { try { file = new File("register.txt"); if (!file.exists()) {

Java - Do not overwrite with bufferedwriter

由 戏子无情 提交于 2020-01-03 08:28:11
问题 I have a program that add persons to an arraylist. What I'm trying to do is add these persons to a text file as well but the program overwrites the first line so the persons get erased. How do I tell the compiler to write at the next free line? import java.io.*; import java.util.*; import javax.swing.JTextArea; public class Logic { File file; FileWriter fw; FileReader fr; BufferedWriter bw; ArrayList<Person> person; public Logic() { try { file = new File("register.txt"); if (!file.exists()) {

NVD3 line chart with vertical line

由 巧了我就是萌 提交于 2020-01-03 08:07:33
问题 I'm trying to generate a linechart in NVD3 with a vertical line. Particularly this kind of line chart. The linechart has two panels a viewing panel and a zoom panel, I would want the line to be on both. Something like this: Is this feasible? Edit: I found out a way to do this by just appending to the data an extra stream which represents a line. e.g. streams[3] = {key:'myline', values:[{x:68,y:0},{x:68,y:7}]} Is there a better way? 回答1: Yes it's possible, Here is an example of how to do it :

How to add a custom legend for geom_hline

由 最后都变了- 提交于 2020-01-02 08:50:07
问题 Using the data below, notice the legend does not properly describe geom_hline: df<-data.frame( points=c(.153,.144,.126,.035, .037, .039, .010,.015,.07), days=gl(3,1,9,labels=c("Sun","Mon","Tues")), lang=c("en","en","en","pt","pt","pt","ko","ko","ko")) ggplot(data=df[df$lang=="en",])+ geom_point(aes(x=days,y=points),size=5,colour='cyan',show_guide=F)+ geom_point(aes(x=days,y=points,colour=days),size=4,show_guide=F)+ facet_wrap(~lang,ncol=1,scales="free")+ xlab("")+ ylab("")+ scale_y_continuous

Sorting Geographical non-contiguous line segments along an implied curve

由 时光毁灭记忆、已成空白 提交于 2020-01-02 08:03:22
问题 Given: A Set (for the sake of discussion we will call it S ), which is an unordered collection of line segments. Each line segment is defined as two Longitude-Latitude end-points. While all of the line segments follow an implied curve, there are "gaps" between each of the segments, of various sizes. We refer to this curve as "implied" because it is not explicitly defined anywhere. The only information that we have available are the line segments contained within S . Desired Result: A sequence

Sorting Geographical non-contiguous line segments along an implied curve

由 南笙酒味 提交于 2020-01-02 08:02:23
问题 Given: A Set (for the sake of discussion we will call it S ), which is an unordered collection of line segments. Each line segment is defined as two Longitude-Latitude end-points. While all of the line segments follow an implied curve, there are "gaps" between each of the segments, of various sizes. We refer to this curve as "implied" because it is not explicitly defined anywhere. The only information that we have available are the line segments contained within S . Desired Result: A sequence

How to draw a curved line in android?

由 送分小仙女□ 提交于 2020-01-02 07:03:34
问题 I am new to Android and I am developing a sample project on drawing lines. I want to draw a curved or elevated line connecting two points (x1,y1 and x2,y2) . I tried canvas.drawArc() method, but the RectF values inside the drawArc method is just the x,y center points of circle. It is giving me an arc between my two points. But I want a curved line exactly connecting my two points. Can somebody help me? Thanks in advance. 回答1: Declare this method inside onDraw method: private void
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