注册WindowServer CGScreenRefreshCallback CGScreenUpdateMoveCallback在C ++ [英] register for WindowServer CGScreenRefreshCallback CGScreenUpdateMoveCallback in C++

问题描述

我想注册CGScreenRefreshCallback和CGScreenUpdateMoveCallback（这里是苹果对 http://developer.apple.com/mac/library/documentation/GraphicsImaging/Reference/Quartz_Services_Ref/Reference/reference.html# // apple_ref / doc / uid / TP30001070-CH1g-F16970 ）
仅使用C ++。

以检索更改的矩形：

  #includeApplicationServices / ApplicationServices.h
 #include< iostream> ; 
 
 using namespace std; 
 
 ///////////// HEADER 
 static void DHRefreshCallback（CGRectCount count，const CGRect * rectArray，void * userParameter）; 
 /////////////////// 
 
 int main（int argc，char * const argv []）{
 
 CGRegisterScreenRefreshCallback（DHRefreshCallback，NULL）; 
 
 while（true）{
 //刚挂起
} 
 return 0; 
} 
 
 
 static void DHRefreshCallback（CGRectCount count，const CGRect * rectArray，void * userParameter）{
 cout< 某事改变了< endl; 
 return; 
} 
  

...但没有工作。

我知道我需要一个连接WindowServer（Quartz Compositor \ Quartz Extreme \ Quartz Extreme 2D ...仍然不能弄清楚差别）和一个正在运行的线程，以获得这些回调，但是我真的不知道如何在C ++中做这个（没有Objective-C）。

任何方向？

thx，
pigiuz

解决方案

C。它是关于OS X应用程序中的事件循环，通常由 CFRunloop （这是一个C API）完成。请参见 Run Loop管理和 CFRunLoop参考。您还需要连接到窗口服务器，可以通过调用

而不是

建立

  while（true）{
 // just hanging 
} 
  

$ b b

只是做

  externCvoid NSApplicationLoad（void）; 
 NSApplicationLoad（）; //建立到窗口服务器的连接。在< Cocoa / Cocoa.h> 
 CFRunLoopRun（）; //运行事件循环
  

不要忘记链接Cocoa.framework;只需在编译器的命令行中添加 -framework Cocoa 即可。
你可以 #import< Cocoa / Cocoa.h> 但是你需要使用Objective-C ++，因为它在其中声明了Objective-C类。 / p>

您可以使用

  RunApplicationEventLoop //建立到窗口服务器的连接
 //并运行事件循环。在< Carbon / Carbon.h>在32位应用程式中使用
  

，而不是 NSApplicationLoad + CFRunLoopRun ，但它不适用于64位应用程式。

I'm trying to register for CGScreenRefreshCallback and CGScreenUpdateMoveCallback ( here's what apple's saying about http://developer.apple.com/mac/library/documentation/GraphicsImaging/Reference/Quartz_Services_Ref/Reference/reference.html#//apple_ref/doc/uid/TP30001070-CH1g-F16970 ) using C++ only.

I wrote this simple tester for the refresh callback in order to retrieve the changing rectangles:

#include "ApplicationServices/ApplicationServices.h"
#include <iostream>

using namespace std;

/////////////HEADER
static void DHRefreshCallback (CGRectCount count,const CGRect * rectArray,void * userParameter);
///////////////////

int main (int argc, char * const argv[]) {

CGRegisterScreenRefreshCallback(DHRefreshCallback, NULL);

while (true) {
    // just hanging
}
return 0;
}


static void DHRefreshCallback (CGRectCount count,const CGRect * rectArray,void * userParameter){
cout << "something changed" << endl;
return;
}

...but didn't work.

I know I need a connection with WindowServer (Quartz Compositor \ Quartz Extreme \ Quartz Extreme 2D...still can't figure out the difference) and a running thread in order to get these callbacks, but I really don't know how to do this in C++ only (no Objective-C at all).

any direction?

thx in advance, pigiuz

解决方案

It's not about using/not using Objective-C. It's about the event loop in OS X apps in general, which is done by CFRunloop, which is a C API. See Run Loop management and CFRunLoop reference. You also need a connection to the window server, which can be established by calling

Instead of

while (true) {
    // just hanging
}

just do

extern "C" void NSApplicationLoad(void);
NSApplicationLoad();  // establish a connection to the window server. In <Cocoa/Cocoa.h>
CFRunLoopRun();       // run the event loop

Don't forget to link against Cocoa.framework; just add -framework Cocoa in the command line of the compiler. You can #import <Cocoa/Cocoa.h> but then you need to use Objective-C++ because of the Objective-C classes declared in it.

You could use

 RunApplicationEventLoop(); //establish a connection to the window server 
                            //and runs the event loop. In <Carbon/Carbon.h>

in an 32 bit app, instead of NSApplicationLoad + CFRunLoopRun, but it's not available in an 64 bit app.

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