gui design patterns

Chapter 9 of the introduction to PHP design patterns Chapter 9 observation patterns some object-oriented programming methods provide a capability to build complex network interconnection between objects. When objects are connected together, they can provide services and information to each other. Generally, when the status of an object changes, you still need to

or after forwarding these requests. This ensures that additional functionality can be added externally without modifying the structure of a given object at run time. In object-oriented design, the extension of functionality to a given class is usually achieved through inheritance.Application Scenarios for Adorner mode:1, need to extend the functionality of a class.2, dynamic for an object to add functionality, but also can be dynamically revoked. (In

1. Motivation and definitionIn factory mode, a factory can only provide one or more products. When there are many product types, a series of GUI controls (for example, we want to create cross-platform buttons, menus, text boxes, and so on) are formed:Using the factory model alone will produce a large number of factories, and the maintenance is not convenient in the future. We can find the rules from the products. If the product level is relatively fix

Design Patterns and concurrent producer-consumer patternsProducer-consumer mode is a classic multithreaded design pattern. It provides a good solution for collaboration between multiple threads.In producer-consumer mode, typically consists of two types of threads, that is, several producer threads and a number of consumer threads. Producer LineProcess is responsi

service name map collection to obtain the corresponding servicefetcher object, and then call Servicefetcher object getservice function obtains servicefetcher The service management object that the object creates. In the getService function of the servicefetcher object, first from the list of Cache arrays maintained by the Context servicefetcher whether an index lookup for an object already includes a service management object created by the Servicefetcher object, and if a service manageme

Java design patterns ------- factory patterns Java design patterns -------- factory patterns Classification and Definition 1) Simple Factory: Also known as the Static Factory Method mode, which belongs to the class creatio

Reprint: http://blog.csdn.net/u013142781/article/details/50825301 There are 23 kinds of Java Classic design patterns, which are divided into three categories: the creation mode (5 kinds), the structure pattern (7 kinds) and the behavior pattern (11 kinds). Behavioral patterns are subdivided into 11 types: Policy mode, template method pattern, observer mode, ite

without modifying the existing code. The difference between using wrapper mode and using inheritance: Using wrapper mode to dynamically add behavior, using inheritance is static and is determined at compile time. Assuming that the inheritance pattern is used, you must write a special class for each possible combination of behaviors, that is, the kind of behavior that your code can represent is determined by the class you are designing, and the customer cannot get a combination of

Design Patterns-factory method patternsDr. Yan Hong's book "JAVA and patterns" describes the factory method patterns in this way:　　The Factory method mode is the class creation mode, also known as the Virtual Constructor mode or the Polymorphic Factory mode.The purpose of the factory method mode is to define a factory

. NET, it is often possible to take advantage of the characteristics of events and delegates to implement the observer pattern, which is a more elegant scenario.Iii. examplesWe now use events to implement the Observer pattern. We design a simple example of a credit card consumption that requires a debit to the user's account while the user is being charged, as well as an SMS alert.The credit card class is defined first, and when the consumption amount

.run(); }}The operation requires interaction, first of all, the requirement to enter the H1 model of the Hummer if there is a sound, as follows:-------H1型号悍马-------- H1型号的悍马是否需要喇叭声响？0-不需要 1-需要输入“0”后的运行结果如下所示：-------H1型号悍马-------- H1型号的悍马是否需要喇叭声响？0-不需要 1-需要0悍马H1发动... 悍马H1引擎声音是这样的... 悍马H1停车...-------H2型号悍马-------- 悍马H2发动... 悍马H2引擎声音是这样的... 悍马H2停车...The results of the operation after entering "1" are as follows:-------H1型号悍马-------- H1型号的悍马是否需要喇叭声响？0-不需要 1-需要 1悍马H1发动...悍马H1引擎声音是这样的...悍马H1鸣笛..

change.Beverage.prototype.customerWantsCondiments =function(){ return true;//seasoning is required by default }; Beverage.prototype.init=function(){ this. Boilwater (); this. Brew (); this. Pourincup (); if( this. customerwantscondiments ()) {//If the hook returns true, the seasoning is required this. Addcondiments (); } };Do you really need to "inherit"?The template method pattern is one of the few inheritance-based desig