monitor

问题 I'm trying to create a wrapper class W in C++, which is constructed with a pointer to a generic object OBJ . When you call one of OBJ methods through W , W (containing a condition variable cv ) issues a cv.wait() before calling OBJ method and a cv.notify() when OBJ method has finished. I've been able to do it with inheritance for a specific class, but would like a generic approach like the one described above. This is the inheritance approach: struct A { virtual void foo(int i) { bar = i; };

问题 I'm trying to create a wrapper class W in C++, which is constructed with a pointer to a generic object OBJ . When you call one of OBJ methods through W , W (containing a condition variable cv ) issues a cv.wait() before calling OBJ method and a cv.notify() when OBJ method has finished. I've been able to do it with inheritance for a specific class, but would like a generic approach like the one described above. This is the inheritance approach: struct A { virtual void foo(int i) { bar = i; };

问题 Is there a equatable bit of code to GetSystemMetrics in win32api, for Ubuntu? I need to get the monitors width and height in pixels. 回答1: I assume you're a GUI toolkit. Why else would you be interested in the screen dimensions? Check out gtk.gdk.screen_width() and gtk.gdk.screen_height() from PyGTK. Something similar should be available for QT. 回答2: I can suggest a few approaches that can be used. I have not used the xlib version though. 1) xlib ( X client library for Python programs), if

问题 I've noticed that the brightness of computer monitors drastically varies between computers. As such, this changes the look of web pages greatly. Is there a way to use JavaScript to automatically detect how bright (or dark) a users monitor is so that I can adjust my web page colors accordingly? UPDATE Please note that I do not want manual user involvement. I want this detection to be automatic so that users don't realize I dynamically change the color palette automatically based on the

问题 I am working on solving a problem with the typical producer-consumer problem. I have multiple producers, and one consumer. There are n producer threads that each call SetOne(OrderObject order) and the consumer calls GetOne() . The Buffer class is used as the buffer which contains < n cells and are each cell are consumed when available by the Buffer class. For some reason, the setup below is working sometimes, but is not always consuming all of the cells. I have included all the classes that

问题 I am using Selenium to open a web site, login and copy some information from one web site. However it is happening on my work station and have a display monitor. my IT team wants to move this process to a virtual server which does not have a monitor. 1.Will this work - even if we install Chrome of Firefox on the server 2. Can we Chrome - headless to make this happen 3. Any other way - we can think of using Xserver Please let me know. 回答1: Chrome headless should solve your problem here -- I've

问题 I have a opencv program in python that takes frames from a webcam and displays the feed. When 'p' is pushed, it grabbes just the face and display this one frame in another window. I would like to force this new window on to my second monitor while the camera feed is on the other one - the "main" monitor. Now it just displays on top of the feed. I have been looking and searching but can't find anything else than moveWindow. How can I use this or another function to do this? Hope someone can

问题 I have a opencv program in python that takes frames from a webcam and displays the feed. When 'p' is pushed, it grabbes just the face and display this one frame in another window. I would like to force this new window on to my second monitor while the camera feed is on the other one - the "main" monitor. Now it just displays on top of the feed. I have been looking and searching but can't find anything else than moveWindow. How can I use this or another function to do this? Hope someone can

问题 I have a Powershell script running on a server and I can't find the reason for it to stop working. I would appreciate any help given/suggested. The Powershell is scheduled to be run (restarted) every day at 4:15. It used to work fine, but for some reason I am experiencing issues now: 1) Powershell is not writing anything in the log file. I use the below action in order to log the event. $action = { $path = $Event.SourceEventArgs.FullPath $changeType = $Event.SourceEventArgs.ChangeType

问题 I'm trying to create a monitor service which would know when apps start/resume/restart/pause/... and also when apps crashes. I have tried to read logcat, but it seems that calls to [onCreate()/onStart()/onRestart()/...] are not logged into logcat. Is there a way to catch all these method calls for all running apps ? Is there a way to know when an app crash ? Note: The service don't need to be notified as soon as these events happens, few seconds/minutes after is also okay. 回答1: Refer to my