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I want to use Qgraphicsview to make an editor, please expert pointing twos!I want to use Qgraphicsview to make an editor, can edit text, picture, control and so on.Problem:1. How can I display a flashing text cursor with keyboard control in Qgraphicsview?2. Can edit the text, picture, control editor How to do the simplest?3. The original text editor Qtextedit can, but do not know how to add the Script button and other controls into the edit box?I want

-element, which I do not repeat, after all, the mobile side of the performance requirements are very high, network and hardware without a PC so goodHere we recommend a mobile End performance optimization article http://isux.tencent.com/h5-performance.html3, finally to a Samsung 3 fixed bug Small tipWhen we set the width:100% to the element position:fixed, the width of the cover 3 or the width of the vertical screen is changed, how to solve① using media queries to re-assign styles on a horizontal

, under the normal addition rule, the correct result of adding positive and negative numbers can be obtained by using the complement. In other words, the computer simply deploys the addition circuit and the complement circuit to complete the addition of all the integers.FinishWonderful comments:z = X + (11111111-y) + 1 can be written as Z = XY +100000000, which can be understood in hardware as two parts of the circuit to achieve, the first part is the front of the X-y (here, regardless of whethe

$_server[' remote_host '] problem! Seeking Daniel's Guidance twos Title: Probably the case: I am in the VPS test program, $_server[' Remote_host ' want to get the domain name of the remote host However, my server is IIS, no csdn above a cow said: Modify the Conf file in the hostnamelookups variable on The reason for not changing Apache is because of temporary unaccustomed. Temporarily do not want to change, if this problem really can not solve I cha

twos of Linu perf use experience Perf is a very powerful tool that has been heard before but has never been used. Record now to find out afterwards. compiling In addition to installing from the Package Manager, you can also compile directly from the source code. Very simple, clone good kernel source code. CD Linux/tools/perf make How easy it is. Run Away Brother is a short temper, the other first do not want to tube, first look at this thing can ru

Binary complement:1, the internal computer system to store data in binary form.2. The decimal data entered in the Java program is automatically converted to binary, and the Java internal is also binary for numeric operations, but the result is decimal.The principle of binary complement:positive + negative = modulo.Modulo: The total number of data of a certain type, for example:4-bit binary number modulo is 2^4=168-bit binary number modulo is 2^8=256Negative number = modulo-positive number, which

/select.htmlIndex.htmlSelect.html3. Template layoutThinkphp's template engine has built-in support for layout templates, which makes it easy to implement template layouts and layout nesting functions. There are three ways of layout:Create a layout.html file under public/{__content__}(1) Global configuration methodA. First we need to configure the core configuration file config.phpOpen the template layout feature and specify the base page' Layout_on ' =>true,' Layout_name ' = ' public/layout ',B.

envelope *Img.style.position = This. options.position; $ varStarttop = parseint (Math.random () *10+ (-10))Panax Notoginseng varStartleft = parseint (Math.random () *containerwidth); - //location of the move the varMoveLeft = parseint (Math.random () *containerwidth+ (-30)); + varT=parseint (Math.random () * 1000+1200); A This. evnanimation ({' Startleft ': startleft, ' starttop ': starttop, ' moveLeft ': moveLeft, ' movetop ': containerheight},t); the } + /*adding elem

(8 for our example) is allowed.Now it can be deduced that, assuming a X positive number, the definition of the original code is, the X X+K complement ( -X ) is defined as M-X+N , this time the formula C becomes:X - Y //记作式D，方便后文引用= X + (-Y)（下面开始转为二进制补码格式）= X + K + ( M - Y + N )+ M ++ M + N = K，即M + N = 0。如果X+ K + N。此时分析负数(X-Y)的补码并根据负数补码定义可以推出：K+N=N，即K为0）最终我们得出M + N = 0，K = 0。而根据硬件易于实现反码的事实，M = 1111。故M = 1111N = 0001K = 0000ConclusionNow we can re-examine the complement mechanism. In fact, the u

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Ask the great God to instruct twos Database connection $rs = mysql_query ("Select Id,degree,min,max,prize,v from Magic_config");while ($r = Mysql_fetch_assoc ($rs)) {$prize _arr[] = $r;}Print_r ($prize _arr); Look, it's coming out. Array ( [0] = = Array ([id] = 1 [Degree] = 1 [min] = 1 [MAX] = 5 [prize] = First Prize [v] + 1) [1] = = Array ([id] = 2 [degree] = 122 [min] = [MAX] = [prize] = Second prize [v] = 1)) But what I want is $prize _arr = Arra

Want to do a websokect chat room on the Internet download some demo are not used, the network heroes pointing twos humbly Title, the little brother PHP is very vegetable, only basic knowledge of PHP code, Recently there is a need to do websokect chat room, but the backend code has been running through, I use Wamp to do PHP server, is not PHP in support of Websokect need to configure what things on the server Ah Ws_static_url = ' http://127.0.0.1/web

];if (op = = ' + ') {result = Atoi (p[n-1]) + atoi (p[n + 1]);printf ("result =%d\n", result);for (int m = n; m if (M = = N) {printf ("result =%d\n", result);sprintf (P[m-1], "%d", result);Puts (p[m-1]);}To determine if this calculation is the last group, the words stop moving the array, not the words moveif (M + 2! = i) {strcpy (P[m], p[m + 2]);strcpy (p[m + 1], P[m + 3]);}else if (m + 2 = = i) {Each time an operation is performed, the array moves up and starts to detect ' * ', '/'and reduce th

manually INSERT into configuration data. Discover that the inserted data contains . If prompted directly in Sqlplus or in Oracle SQL Develper , because they recognize the string after as a variable. Solution:use set define off; This will also identify the part that contains as a normal string. performance issues with 3.FULL JOINProblem Scenario:The ticket(problem description list) contains countries and regions, but the countries and regions here are not exactly matched, that is, the relation

Title, the little brother PHP is very vegetable, only basic knowledge of PHP code, Recently there is a need to do websokect chat room, but the backend code has been running through, I use Wamp to do PHP server, is not PHP in support of Websokect

Before I wrote a MAC address plus minus 1 conversion of the article, there are some less comprehensive, here I re-a blog to explain.The real address of the Mac should be: ADCF4D5FD3CF, this, not AD:CF:4D:5F:D3:CF, this is the artificial colon, in order to look convenient;How about the MAC address minus 1? In fact, since the M