cursor

I need to change the cursor of a TreeViewItem in a trigger. This code works for all other properties but not Cursor: <Style.Triggers> <MultiTrigger> <MultiTrigger.Conditions> <Condition Property="QuickPhrases:TreeViewChecker.IsMouseDirectlyOverItem" Value="True"> </Condition> <Condition Property="CanSelect" Value="True"></Condition> </MultiTrigger.Conditions> <Setter Property="BorderThickness" Value="0,0,0,1" /> <Setter Property="BorderBrush" Value="Blue" /> <Setter Property="Cursor" Value="Hand"></Setter> <Setter Property="Foreground" Value="Blue"></Setter> </MultiTrigger> </Style.Triggers>

数据库链接池之threading.local线程版 import pymysql import threading from concurrent.futures import ThreadPoolExecutor from DBUtils.PooledDB import PooledDB class SqlHelper(object): def __init__(self): self.pool = PooledDB( creator=pymysql, # 使用链接数据库的模块 maxconnections=6, # 连接池允许的最大连接数，0和None表示不限制连接数 mincached=2, # 初始化时，链接池中至少创建的链接，0表示不创建 blocking=True, # 连接池中如果没有可用连接后，是否阻塞等待。True，等待；False，不等待然后报错 ping=0, # ping MySQL服务端，检查是否服务可用。 # 如：0 = None = never, 1 = default = whenever it is requested, # 2 = when a cursor is created, 4 = when a query is executed, 7 = always host='127.0.0.1', port=3306, user='root',

什么是数据库链接池？以及作用？ ''' 数据库链接池的基本原理：为数据库建立一个缓冲池，预先在池中放入一定数量的数据库链接管道，需要时，从链接池中取出管道进行使用，操作完毕后，再将链接放回到池子中，从而避 免了频繁的链接数据库，资源的申请和释放的性能损耗 由于数据库链接得到重用，避免了频翻创建，释放链接引起的大量性能开销，在减少系统消耗的基础上，增进了系统环境的平稳性,更快的系统响应速度 ''' 数据库链接池函数多线程版 from DBUtils.PooledDB import PooledDB from concurrent.futures import ThreadPoolExecutor POOL = PooledDB( creator=pymysql, # 使用链接数据库的模块 maxconnections=6, # 连接池允许的最大连接数，0和None表示不限制连接数 mincached=2, # 初始化时，链接池中至少创建的链接，0表示不创建 blocking=True, #连接池中如果没有可用连接后, #是否阻塞等待。True，等待；False，不等待然后报错 ping=0, # ping MySQL服务端，检查是否服务可用。 # 如：0 = None = never, 1 = default = whenever it is requested, # 2 =

继续上一个例子，结合ListView中对SQLite进行操作。 通过CursorAdapter在ListView中的数据呈现 在上一个例子中，我们可以对SQLite中的数据库进行增删改查，将数据读到游标Cursor中，然后一一读出。在Android中可以通过CursorAdapter直接将数据映射到ListView中，如下处理： public class Chapter22Test1 extends ListActivity{ private SQLiteDatabase db = null; private Cursor cursor = null; private SimpleCursorAdapter adapter = null; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); db= (new Chapter22Db (getApplicationContext())).getWritableDatabase(); cursor =db.rawQuery("SELECT _id,Name,Weight from mytable ORDER BY Weight", null); //layout/chapter_22_test1

CSS允许您将鼠标悬停在元素上时设置所需的光标样式。 例如，您可以将光标更改为手形图标，帮助图标等，而不是使用默认指针。 cursor参数值 cursor属性还有许多其他的值，例如： default - 默认光标 crosshair - 光标显示为十字准线 pointer - 光标显示手形图标 cursor的值较多，以下用图片的形式列出。 来源： https://www.cnblogs.com/Salicejy/p/11911716.html

as per the topic. If we used to call cursor.requery(), but it is now deprecated, how do you call this function now? "This method is deprecated. Don't use this. Just request a new cursor, so you can do this asynchronously and update your list view once the new cursor comes back." So how does one request a new cursor and pass it back to the adapter? Mohammed Azharuddin Shaikh again re-initialize cursor when your any DML query execute, can refer this Rasel Just think about a block where you need to use cursor again and again. Populate it with the query. Work with it and then close before reusing

问题 1：大量块丢失 (gc lost blocks, gc current/cr lost blocks) 症状 I. AWR 报告中显示有大量块丢失。 II. netstat -s 报告数据包重新组装故障（reassambly failure）和丢失数据包（dropped packets）增加。 解决方案 使用以下文档进行故障排除并解决丢失块问题。该文档描述了症状、可能原因以及解决方案。 Document 563566.1 - gc block lost diagnostics 问题 2：大量 log file sync 等待 症状 I. AWR 报告中显示 log file sync 始终位于 Top 5 等待事件列表中。 II. 平均 log file sync 时间很长（> 20 毫秒）。 III. 平均 log file parallel write 时间很长（> 10 毫秒）。 III. 平均 redo write broadcast ack time 或者 wait for scn ack 时间很长（> 10 毫秒）。 IV. 平均 log file sync 时间很短，但 log file sync 等待次数太多。 背景 用户会话在提交或回退时，会话的重做信息需要由 LGWR 刷新到重做日志文件。用户会话等待“log file sync”的同时，等待 LGWR

I am working on QT v5.2 I need to hide the blinking cursor (caret) of QLineEdit permanently. But at the same time, I want the QLineEdit to be editable (so readOnly and/or setting editable false is not an option for me). I am already changing the Background color of the QLineEdit when it is in focus, so I will know which QLineEdit widget is getting edited. For my requirement, cursor (the blinking text cursor) display should not be there. I have tried styleSheets , but I can't get the cursor hidden ( {color:transparent; text-shadow:0px 0px 0px black;} ) Can someone please let me know how can I

The data is in a Database, so I would normally use CursorAdapter and have it work with CursorLoader on a ListView, however now I need a ViewPager instead of a ListView and that takes a PagerAdapter and I only have it have seen it work with lists. Is there a native pager adapter that uses a cursor or ill have to make it work? Thanks! Based on the internals of the CursorAdapter I have an implementation that extends FragmentPagerAdapter with the only difference that you will use the information coming from a Cursor to instantiate a Fragment . package com.example; import android.content.Context;