size

Make JCheckbox bigger..?

由 拟墨画扇 提交于 2020-01-24 09:11:46
问题 i want to make my JCheckboxes in a JTable bigger (for Touchscreen), but it doesn't change the size. I tried it with setPrefferedSize setSize What should I do?.. 回答1: I assume you mean you want a bigger check box. If so then you need to create images to represent the unselected and selected icons of the check box. Then you can create a renderer and editor using these icons. Finally you would need to increase the height of each row in the table. The code might look something like: Icon normal =

QTabWidget size depending on current Tab

由 ▼魔方 西西 提交于 2020-01-24 05:22:48
问题 I've a QTabWidget , which contains widgets of different heights (their widths are fixed), however, the default implementation of QTabWidget selects the biggest widget's height as own height. What I would like to know if there's a (possible fast) way to change the size of QTabWidget depending on its current tab, to save space when smaller tabs are shown. 回答1: You can set the size policy of the widget that is displayed to QSizePolicy::Preferred and the other ones to QSizePolicy::Ignored . After

getting size of image from a link as dynamic content

由 旧街凉风 提交于 2020-01-24 01:58:19
问题 I want to make an image previewer inside a page. I will have a "div" to include smaller images by setting the size of "img" by hand. Then clicked or hovered, the image will show on a bigger "div", as small as the image itself or as big as window view size near the mouse pointer. the code will have only image link and will get actual image size from there. setting the size and position of previewer "div" is just a mathematical problem for me. but I can't seem to find how to get image size by

必知C++算法之栈和队列基本操作

由 本秂侑毒 提交于 2020-01-23 15:10:05
栈 1.push 2.pop 3.top 4.size 注意：遍历打印栈空间时不要用for循环size(),因为栈的size()时在改变的，输出会少很多数据 cout << "s.size()=" << s.size() << endl; for(int i = 0; i < s.size(); ++i) { cout << s.size() << endl; cout << s.top() << " "; s.pop(); } 用while+empty()即可： while (!s.empty()) { cout << s.top() << " "; s.pop(); } 栈的一些操作： //获取栈底元素 int getBottomNum(stack<int>& stack) { if (stack.empty()) return -1; int res = stack.top(); stack.pop(); if (stack.empty()) { return res; } else { int last = getBottomNum(stack); stack.push(res); return last; } } void test01() { //移除栈底元素 stack<int> stack; for (int i = 2; i < 10; ++i) { stack

How to find byte sizes of R figures on pages?

由 蓝咒 提交于 2020-01-23 13:51:52
问题 I would like to monitor the basic quality of the figures produced in R on individual pages such as byte size of each page, ... I can now do only quality assurance of average pages, see the following chapter about it. I think there must be something builtin for the task than average measures. Code which produces 4 pages in Rplots.pdf where I would like to know the byte size of each page in an output here; any other statistics of the page outputs is also welcome; you can get the basic memory

Scatterplot Marker Size proportional to axis value - why is the number of pixels for the x and y axis different for aspect='equal'?

由 二次信任 提交于 2020-01-23 11:45:29
问题 My question is as far as I see closely related to this post. I need to plot some data with marker size strictly proportional to the value of the axes. (Already asked the question here). My approach is the following: Create empty scatterplot for pixel reference Scatter 2 points on the lower left and upper right corner Limit the axes to exactly these two points use transData.transform to get the pixel values of those two points get the pixel distance as the difference in pixel number of these

Scatterplot Marker Size proportional to axis value - why is the number of pixels for the x and y axis different for aspect='equal'?

由 此生再无相见时 提交于 2020-01-23 11:45:29
问题 My question is as far as I see closely related to this post. I need to plot some data with marker size strictly proportional to the value of the axes. (Already asked the question here). My approach is the following: Create empty scatterplot for pixel reference Scatter 2 points on the lower left and upper right corner Limit the axes to exactly these two points use transData.transform to get the pixel values of those two points get the pixel distance as the difference in pixel number of these

关于C++类的大小（size）

由 别来无恙 提交于 2020-01-22 21:37:45
1. 空类 class A { }; void main() { printf("sizeof(A): %d\n", sizeof(A)); getchar(); } 得到结果为：1。 类的实例化就是给每个实例在内存中分配一块地址。空类被实例化时，会由编译器隐含的添加一个字节。所以空类的size为1。 2.虚函数 class A { virtual void FuncA(); virtual void FuncB(); }; 得到结果：4 当C++ 类中有虚函数的时候，会有一个指向虚函数表的指针（vptr），在32位系统分配指针大小为4字节。所以size为4. 3.静态数据成员 class A { int a; static int b; virtual void FuncA(); }; 得到结果：8 静态数据成员被编译器放在程序的一个global data members中，它是类的一个数据成员．但是它不影响类的大小，不管这个类实际产生了多少实例，还是派生了多少新的类，静态成员数据在类中永远只有一个实体存在，而类的非静态数据成员只有被实例化的时候，他们才存在．但是类的静态数据成员一旦被声明，无论类是否被实例化，它都已存在．可以这么说，类的静态数据成员是一种特殊的全局变量． 所以该类的size为：int型4字节加上虚函数表指针4字节，等于8字节。 4.普通成员函数 class A

Automatic code deduplication of assembly language?

由 夙愿已清 提交于 2020-01-22 14:39:50
问题 I've been going through some Assembly Programming Videos to get a better understanding of how to manually optimize the *.s files left after compiling with gcc/g++ -S ... One of the topics covered was Refactoring Redundant Code that demonstrates how to move redundant code to its own labeled block ending with a ret and replacing it with a call. The example given in the video is 2 blocks containing: mov eax,power mul ebx mov power,eax inc count which it replaces with call CalculateNextPower and

枚举类型的基本用法

由 给你一囗甜甜゛ 提交于 2020-01-22 09:01:32
示例： public class EnumTest { 　　public static void main(String[] args) 　　{ 　　　　Size s=Size.SMALL; 　　　　//s和t引用同一个对象？ 　　　　System.out.println(s==t); // 　　　　//是原始数据类型吗？ 　　　　System.out.println(s.getClass().isPrimitive()); 　　　　//从字符串中转换 　　　　Size u=Size.valueOf("SMALL"); 　　　　System.out.println(s==u); //true 　　　　//列出它的所有值 　　　　for(Size value:Size.values()) 　　　　{ 　　　　　　System.out.println(value); 　　　　} 　　} } enum Size{SMALL,MEDIUM,LARGE}; 运行结果： 枚举类型基本用法： 1. Size s=Size.SMALL; Size t=Size.LARGE; / 从字符串转换为枚举 　　在上例可知 s 和 t 没有引用同一个对象。 2. 枚举类型是引用类型，不是原始数据类型。 　 在上例中将字符串转化成枚举类型后 s 和 t 不是原始数据类型。 　　（ int 、 float
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