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Resize QStackedWidget to the page which is opened [duplicate]

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问题 This question already has answers here : Qt QStackedWidget Resizing Issue (3 answers) Closed 5 years ago . I want my QStackedWidget to resize to the page which is opened. I got a lot of widgets attached to the first page, but the rest pages have only one button. So they stay so big, and the first page is ok. How can I make my QStackedWidget to have the size of the page being viewed. The reason why i want to do this is that I have three different options, and after that I have other things. If

how to get the size of a dir programatically in linux?

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问题 I want to get the exact size of a particular dir in linux through a C program. I tried using statfs(path,struct statfs &) but it doesn't give exact size. I also tried with stat() but it returns size as 4096 for any dir ! Please suggest me the way through which I can get the exact size of dir just like we get after "du -sh dirPath" command. Also I dont wanna use du through system(). Thanks in advance. 回答1: Typical Solution If you want the size of a directory, similar in fashion to du, create a

String memory usage in Golang

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问题 I was optimising a code using a map[string]string where the value of the map was only either "A" or "B". So I thought Obviously a map[string]bool was way better as the map hold around 50 millions elements. var a = "a" var a2 = "Why This ultra long string take the same amount of space in memory as 'a'" var b = true var c map[string]string var d map[string]bool c["t"] = "A" d["t"] = true fmt.Printf("a: %T, %d\n", a, unsafe.Sizeof(a)) fmt.Printf("a2: %T, %d\n", a2, unsafe.Sizeof(a2)) fmt.Printf(

Custom byte size?

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问题 So, you know how the primitive of type char has the size of 1 byte? How would I make a primitive with a custom size? So like instead of an in int with the size of 4 bytes I make one with size of lets say 16. Is there a way to do this? Is there a way around it? 回答1: Normally you'd just make a struct that represents the data in which you're interested. If it's 16 bytes of data, either it's an aggregate of a number of smaller types or you're working on a processor that has a native 16-byte

Default font size of JavaFX under Linux is larger as on Windows

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问题 I noticed that the default font is way larger in JavaFX under Linux (Ubuntu XY) as it is under Windows. Since screen space is sometimes quite limited i would like to have it ideally the same size as it is under Windows. Is there a simple way to enforce the same default size / the same DPI value? 回答1: In short, font rendering will depend of the OS. So you will have more/less pixels for the same word depending of the OS where java is running. One good practice is to use: USE_COMPUTED_SIZE as

IE CSS bug: IMG original height affecting parent height

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问题 I've got a PARENT flexbox div (which is also part of a column flexbox): div.flex_block { width:100%; flex: 1 1 auto; display:flex; flex-direction:row; align-items:center; justify-content:space-between; padding-bottom:30px; } It contains 2 children: .flex_block .content{ max-width:none; /* override other code */ flex: 0 1 50%; } .flex_block .image{ max-width:none; /* override other code */ flex: 0 1 35%; } The first child has some text in it. The second has an oversized image, that is set to

elasticsearh搜索过滤filter

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首先要讲下,为什么需要使用filter过滤过滤并不会返回一个匹配度score,以至于它比查询要快很多过滤查询后的结果能被缓存到内存中,并被多次重复使用. 1.如果我们要查询出account中blance从20000到30000之间的数据 curl -XPOST localhost:9200/bank/_search?pretty -d '{ "query":{ "filtered":{ "query":{ "match_all":{}}, "filter":{ "range":{ "balance":{ "gte":20000, "lte":30000 } } } } } }' { "took" : 102, "timed_out" : false, "_shards" : { "total" : 5, "successful" : 5, "failed" : 0 }, "hits" : { "total" : 217, "max_score" : 1.0, "hits" : [ { "_index" : "bank", "_type" : "account", "_id" : "49", "_score" : 1.0, "_source":{"account_number":49,"balance":29104,"firstname":"Fulton","lastname":

How to increase scala stack size?

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问题 I am getting a java.lang.StackOverflowError , when I execute a Scala program. I believe that the stack size can be set with -DXss=n , but it does not work on my system: Scala compiler version 2.7.7final and Linux 2.6.38-8-generic #42-Ubuntu The attached program witnesses the problem on my system. // scalac StackOverflow.scala // scala StackOverflow 6000 // scala -DXms=200M -DXmx=200M -DXss=200M StackOverflow 6000 object StackOverflow { def recur(k: Double): Double = { // check effects of

xcode iphone simulator view smaller than storyboard

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问题 I'm having issues with the size of my story board and the size of the actual display on the iPhone Simulator. Any ideas? 回答1: Your simulator is proper. No need to resize it. You only need to follow these steps 1. go to nib/storyboard. 2. click on view 3. check menu on right side 4. go to 4th tab 5. Expand Simulated Metrics 6. Check Status bar is equal to Default 7. Top Bar & Bottom Bar are equal to None & None respectively. Enjoy Programming! 回答2: There are many correct answers to this

How to get byte size of multibyte string

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问题 How do I get the byte size of a multibyte-character string in Visual C? Is there a function or do I have to count the characters myself? Or, more general, how do I get the right byte size of a TCHAR string? Solution: _tcslen(_T("TCHAR string")) * sizeof(TCHAR) EDIT: I was talking about null-terminated strings only. 回答1: According to MSDN, _tcslen corresponds to strlen when _MBCS is defined. strlen will return the number of bytes in the string. If you use _tcsclen that corresponds to _mbslen