wrapper

问题 I'm writing a wrapper around a C library in Objective-C. The library allows me to register callback functions when certain events occur. The register_callback_handler() function takes a function pointer as one of the parameters. My question to you gurus of programming is this: How can I represent an Objective-C method call / selector as a function pointer? Would NSInvocation be something useful in this situation or too high level? Would I be better off just writing a C function that has the

问题 Have you heard of a virtual joystick for Windows that has Java wrappings? I've trying PPJOY, and it works great, but then I'll need to use JNI to get it working from Java and that doesn't seem easy for the time being. Thanks! 回答1: There you are. I've made a Java wrapper for PPJoy. And it's really easy to use. See: try { /* * Try to create a new joystick. */ Joystick joystick = new Joystick(); try { /* * Set joystick values */ /* * Set analog values for Axis X/Y/Z, * Rotation X/Y/Z, Slider,

问题 I am using custom Membership and Role providers inside the ASP.NET framework with Forms Authentication. These are working great. The Role provider is using a cookie to persist the roles, saving a trip to the database on each web request. I am also using the UserData string inside the FormsAuthenticationTicket to store the UserId. I need to refactor my DAL out of the web project to its own project. The DAL has a dependency on retrieving the Current user’s ID as well as checking the roles for

问题 We are developing a corporate component library which should provide Material Designed Angular Components. So the users of this library are not supposed to use e.g. Angular Material directly but rather include some component like " custom-tabs ". Using the components of MatTabModule directly works like a charm, whereas when using our custom components the projected content does not show up. Usage looks very similar to the Angular Material API: <custom-tabs> <custom-tab [label]="labelA"

问题 In my other question, I've been trying to find someone who knows where to find free open source OCR library for C#. However, it seems there is only C++ library and obviously, C++ is not C#. One of the responds suggested to write my own wrapper in C#. I have pretty much no idea how to do it, where to learn to do it, or what it actually is - except I believe it's calling C++ methods in dll by changed method calls, .. that's just assumption, indeed. Please, help out one more newbie. Thank you

问题 I'am talking about this example of a Scilab<->C wrapper: http://www.scilab.org/doc/intro/node89.html. The strange part is this one: int intsfoubare(fname) char *fname; { ....(some code) } It is some kind of function defintion but I really don't understand what the char *fname is good for also just fname as parameter makes no sense to me. Is someone able to explain this? [start crying] Scilabs documentation in general is a negative example but when it comes to the C-interface it's even worse.

问题 I know that java I/O uses decorator pattern. But I feel that I understand its wrong. Please clarify difference between two code snippets: snippet 1: PipedInputStream pipedInputStream = new PipedInputStream(); PipedOutputStream pipedOutputStream = new PipedOutputStream(); pipedOutputStream.connect(pipedInputStream); ObjectOutputStream objectOutputStream = new ObjectOutputStream(pipedOutputStream); objectOutputStream.writeObject("this is my string"); ObjectInputStream objectInputStream = new

问题 I'm currently working on creating a dynamic timeline using AngularJS. The data from my timeline is fetched from a JSON file, which I have already been successfully able at configuring. Here is what I currently have on PLNKR: http://plnkr.co/edit/avRkVJNJMs4Ig5mDrwJ8 This is my current navigation: <nav id="sticky-navigation"> <ul> <li><a href="#decade-1960s">1960</a></li> <li><a href="#decade-1970s">1970</a></li> <li><a href="#decade-1980s">1980</a></li> <li><a href="#decade-1990s">1990</a><

问题 So I know how to use .wrap , .wrapInner and .wrapAll but I am wondering how to use the quick creation syntax introduced in jQuery 1.4 and the wrap function together. Basically I want to be able to use var targetUl = $(this), // would be populated by script maxWidth = 1400; // would be populated by script $('<div />', { 'id':'wrap', 'css': { 'width': maxWidth, 'overflow':'hidden' } }).wrapAround(targetUl); Kinda like the .appendTo method works but for wrapping stuff… Can this be done? Thanks.

问题 I'm in the process of writing a C# wrapper for Dallmeier Common API light (Camera & Surviellance systems) and I've never written a wrapper before, but I have used the Canon EDSDK C# wrapper. So I'm using the Canon wrapper as a guide to writing the Dallmeier wrapper. I'm currently having issues with wrapping a callback. In the API manual it has the following: dlm_connect int(unsigned long uLWindowHandle, const char * strIP, const char* strUser1, const char* strPwd1, const char* strUser2, const