subclass

I want to intercept messages that are being sent to a window in a different process. What is the best way to do this? I can't see the messages when I use the WH_GETMESSAGE hook, and I'm not sure if I can subclass across processes? Any help would be much appreciated. You need to inject your own code into the process that owns the windows you wish to intercept messages from. Fortunately, SetWindowsHookEx() makes this fairly easy, although you may have a bit of trouble at first if you've only used it for in-process hooking up to now. I can recommend two excellent articles on the subject: Joseph

I'm currently building a tabbed iPhone application where each tab's view controller is an instance of UINavigationController , and where every subcontroller of every one of the UINavigationController instances is an instance of UITableViewController . Ideally, I'd like to subclass UINavigationController so that the controller for each tab is a subclass of UINavigationController that (in addition to having all the standard UINavigationController functionality, obviously) serves as the datasource and the delegate for each of the table views associated with its subcontrollers. Trying to do this

Let's say I have a base class named Entity . In that class, I have a static method to retrieve the class name: class Entity { public static String getClass() { return Entity.class.getClass(); } } Now I have another class extend that. class User extends Entity { } I want to get the class name of User: System.out.println(User.getClass()); My goal is to see "com.packagename.User" output to the console, but instead I'm going to end up with "com.packagename.Entity" since the Entity class is being referenced directly from the static method. If this wasn't a static method, this could easily be solved

So i have these textfields that i realised that they all have same properties, so i created new class called " UserInputs " and extended from UITextField , everything works properly except one thing, UITextFieldDelegate functions doesn't work, i mean when i focus on them it doesn't work, i want to add it in code because when you focus on my input fields they change border, how do i properly subclass from UITextField the only problems that i have are that functions: textFieldDidBeginEditing textFieldDidEndEditing and so doesn't work. this is my class where everything happens: import Foundation

A subtype is established when a class is linked by means of extending or implementing. Subtypes are also used for generics. How can I differentiate subtyping from subclasses? In Java, subclassing is a kind of subtyping. There are a number of ways Java allows subtyping: When class A extends B , A is a subtype of B because B b = new A(...); is ok. When interface A extends B , A is a subtype of B because B b = new A() { ... } is ok. When class A extends B , A[] is a subtype of B[] because B[] b = new A[0] is ok. When class A implements B , A is a subtype of B because B b = new A(...) is ok. It

Can anybody tell me when to use categories and when to use subclassing in Objective-C? Also please tell me the advantages and disadvantages of them. An objective-c category is useful if you want to alter the behavior of ALL instances of the class, with minimal code. Subclassing is more useful if you want to alter the behavior of only certain instances, and retain the original method for others. Categories can be dangerous, especially if you cannot view the source of the original method, so you should generally use subclasses on third-party and private frameworks rather than a category.

After reading lots of blogs, forum entries and several Apple docs, I still don't know whether extensive subclassing in Objective-C is a wise thing to do or not . Take for example the following case: Say I'm developing a puzzle game which has a lot of elements. All of those elements share a certain amount of the same behaviour. Then, within my collection of elements, different groups of elements share equal behaviour, distinguishing groups from groups, etc... So, after determining what inherits from what, I decided to subclass out of oblivion. And why shouldn't I? Considering the ease tweaking

There appears to be a new pragma named parent that does roughly the same thing as base . What does parent do that warrants a new (non-core) module? I am missing something? ysth base tried to do one too many things – automatically handling loading modules but also allowing establishing inheritance from classes already loaded (possibly from a file whose name wasn't based on the module name). To sort of make it work, there was some hackery that caused surprising results in some cases. Rather than break backwards compatibility, a new, replacement pragma parent was introduced with cleaner semantics

What's the difference between UserDict , dict and ABC and which one is recommended? The docs seem to deprecate UserDict ? Also it seems UserDict's update() would use my setitem method whereas dict doesn't? Which methods are really essential to override given I want custom setitem and getitem function? With ABC s I'd have to implement absolutely all methods since it provides no default implementation? I want to make a dict that does two things: intern() all keys and values store some of the values in an SQLite database So which of UserDict , dict and ABC would best allow me to do this? If you

I'm trying to create a subclass of UIBezierPath to add some properties that are useful to me. class MyUIBezierPath : UIBezierPath { var selectedForLazo : Bool! = false override init(){ super.init() } /* Compile Error: Must call a designated initializer of the superclass 'UIBezierPath' */ init(rect: CGRect){ super.init(rect: rect) } /* Compile Error: Must call a designated initializer of the superclass 'UIBezierPath' */ init(roundedRect: CGRect, cornerRadius: CGFloat) { super.init(roundedRect: roundedRect, cornerRadius: cornerRadius) } required init(coder aDecoder: NSCoder) { fatalError("init