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Articles indexed Tuesday April 27 2010

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  • HTML5 move Canvas object

    - by Mircea
    Hi, I have 2 canvas created on the same canvas. Is it possible to drag the small black one around? I want to make it draggable but I can not find any online tutorial or demo on this. Is it possible? I had looked to Canvas moveTo or transitions but I was unable to make it work. The code is here http://jsfiddle.net/35P9F/2/ var ctx = document.getElementById('canvas').getContext('2d'); var radgrad3 = ctx.createLinearGradient(255,10,0,180,80,190); radgrad3.addColorStop(0, '#00C9FF'); radgrad3.addColorStop(1, 'red'); ctx.fillStyle = radgrad3; ctx.fillRect(0,0,255,255); var ctx4 = document.getElementById('canvas').getContext('2d'); var radgrad4 = ctx4.createLinearGradient(0, 0, 0, 255); radgrad4.addColorStop(0, '#000000'); radgrad4.addColorStop(1, '#ff0000'); ctx4.fillStyle = radgrad4; ctx4.fillRect(0,0,25,25); Thank you.

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  • dynamically created arrays

    - by DevAno1
    My task consists of two parts. First I have to create globbal char array of 100 elements, and insert some text to it using cin. Afterwards calculate amount of chars, and create dedicated array with the length of the inputted text. I was thinking about following solution : char[100]inputData; int main() { cin >> inputData >> endl; int length=0; for(int i=0; i<100; i++) { while(inputData[i] == "\0") { ++count; } } char c = new char[count]; Am I thinking good ? Second part of the task is to introduce in the first program dynamically created array of pointers to all inserted words. Adding a new word should print all the previous words and if there is no space for next words, size of the inputData array should be increased twice. And to be honest this is a bit too much for me. How I can create pointers to words specifically ? And how can I increase the size of global array without loosing its content ? With some temporary array ?

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  • SQL Server 2005 script with join across Database Servers

    - by Robin Day
    I have the following script which I use to give me a simple "diff" between tables on two different databases. (Note: In reality my comparison is on a lot more than just an ID) SELECT MyTableA.MyId, MyTableB.MyId FROM MyDataBaseA..MyTable MyTableA FULL OUTER JOIN MyDataBaseB..MyTable MyTableB ON MyTableA.MyId = MyTableB.MyId WHERE MyTableA.MyId IS NULL OR MyTableB.MyId IS NULL I now need to run this script on two databases that exist on different servers. At the moment my solution is to backup the database from one server, restore it to the other and then run the script. I'm pretty sure this is possible, however, is this likely to be a can of worms? This is a very rare task I need to perform and if it involves a large number of DB setting changes then I will probably stick to my backup method.

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  • Border in DrawRectangle

    - by undsoft
    Well, I'm coding the OnPaint event for my own control and it is very nescessary for me to make it pixel-accurate. I've got a little problem with borders of rectangles. See picture: These two rectangles were drawn with the same location and size parameters, but using different size of the pen. See what happend? When border became larger it has eaten the free space before the rectangle (on the left). I wonder if there is some kind of property which makes border be drawn inside of the rectangle, so that the distance to rectangle will always be the same. Thanks.

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  • Static variable not initialized

    - by Simon Linder
    Hi all, I've got a strange problem with a static variable that is obviously not initialized as it should be. I have a huge project that runs with Windows and Linux. As the Linux developer doesn't have this problem I would suggest that this is some kind of wired Visual Studio stuff. Header file class MyClass { // some other stuff here ... private: static AnotherClass* const Default_; }; CPP file AnotherClass* const Default_(new AnotherClass("")); MyClass(AnotherClass* const var) { assert(Default_); ... } Problem is that Default_is always NULL. I also tried a breakpoint at the initialization of that variable but I cannot catch it. There is a similar problem in another class. CPP file std::string const MyClass::MyString_ ("someText"); MyClass::MyClass() { assert(MyString_ != ""); ... } In this case MyString_is always empty. So again not initialized. Does anyone have an idea about that? Is this a Visual Studio settings problem? Cheers Simon

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  • Disable control in .aspx from Masterpage conditionally

    - by miccet
    Ok, this might be a bit weird, so I'll start with explaining what I'm trying to do. I have several masterpages for my site, and in they inherit each other. In the second of them (4 in total) I have a background image. Here comes the trick, I'd like to override this image from the final aspx page. I can't change the position of this image, it has to be in masterpage 2, since some pages uses that very page as masterpage. One idea I had was to create a ContentPlaceHolder next to the image and if there are any images in that (check in Page_Load) then the main image would be hidden. I did this with a recursive function, that finds the image by looping through the ContentPlaceHolder's controls. When I set the visibility property to false though, nothing happens. Any other ideas to how this could be done, or why the above doesn't work? Edit: It's not about changing items in the master pages, rather the other way around, that from the Masterpages codebehind dig down into the page that is displayed currently and see if it has controls in a specific ContentPlaceHolder.

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  • Python: Traffic-Simulation (cars on a road)

    - by kame
    Hello! I want to create a traffic simulator like here: http://www.doobybrain.com/wp-content/uploads/2008/03/traffic-simulation.gif But I didn't thougt very deep about this. I would create the class car. Every car has his own color, position and so on. And I could create the road with an array. But how to tell the car where to go? Could I hear your ideas? EDIT: Is it forbidden to get new ideas from good programmers? Why do some people want to close this thread? Or were to ask such questions? I dont understand them. :(

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  • Need help in Arshaw Calender

    - by user326780
    i am trying to integrate the jquery Full Calendar (http://arshaw.com/fullcalendar/) in my asp.net mvc application. I need to use this full calendar to add/edit/delete/show the events using the sql server 2005 database as backend. Do anyone have the sample code to implement the fetch, add/edit/delete events with this Full Calendar for c#

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  • What is some good software for designing MySQL databases?

    - by franzferdinand
    As above. Usually at work someone else does the database design, and when I do personal projects they're small enough to not really require more than five or six tables, but I'm about to start a personal project that I think will probably require around eleven or twelve tables and I'd like something to help me design it neatly and keep track of it.

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  • Clojure and NoSQL databases

    - by Mad Wombat
    I am currently trying to pick between different NoSQL databases for my project. The project is being written in clojure and javascript. I am currently looking at three candidates for storage. What are the relative strengths and weaknesses of MongoDB, FleetDB and CouchDB? Which one is better supported in Clojure? Which one is better supported under Linux? Did I miss a better product (has to be free and OSS)?

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  • La France peu exposée à la cyber-criminalité d'après un rapport de Microsoft qui pousse à migrer ver

    La France est peu exposée à la cybercriminalité Et Windows 7 serait beaucoup moins perméable aux attaques, selon Microsoft Microsoft vient de publier la 8ème édition de son rapport semestriel sur la sécurité : le SIR (pour Security Intelligence Report). D'après ce rapport, les pirates ont adapté leurs techniques pour être plus efficaces sur différents types de cibles. Par exemple, les réseaux d'entreprise sont davantage sensibles aux vers alors que les « systèmes à domicile » sont plus soumis à des attaques sous forme de fausses loteries (9% des spams filtrés contre 4 % sur le premier semestre) ou par des logiciels malveillants comme les faux anti-virus, les Botnets ou les manipula...

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  • Will PHP Die In Web Page Development World?

    - by Morgan Cheng
    I know that PHP is still the most popular web programming language in the world. This question just want to bring some of my concerns about PHP. PHP is naturally bound to C10K problem. Since PHP (generally run in Apache) cannot be event-driven or asynchronous, each HTTP request will occupy at least one thread or process. This makes it resistant to be more scalable. Currently, a lot of web sites (like Facebook) with high performance and scalability still depends on PHP in their front end servers. I suppose it is due to legacy reason. Is it possible that PHP will be replaced by language more suitable for C10K?

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  • Best three tier C# Implement "style"

    - by nXqd
    I'm new to C# three tier implement and I've found a lot of implementations in Internet. I don't know what difference and benefit from its . Thanks a lot for reading this and I'm waiting for your answers. And I really want to know your implementation :)

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  • contenteditable realtime replace youtube url

    - by pimz
    so the problem is, i have a contenteditable div, with a keyup function binded. everytime somebody puts a youtube url in it, it has to be replaced by an embedded movie. i came up with a regex like this : content.match(/http:\/\/\w{0,3}.?youtube+\.\w{2,3}\/watch\?v=.*?(?=\s)/g); firefox wil do the replace after a whitespace, but in ie it won't work. any suggestions? thnx in advance!

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  • UIView frame origin doesn't set good

    - by Infinity
    Hi guys! Here is my code: frame = _pageContentView.frame; NSLog(@"%f; %f; %f; %f;", frame.origin.x, frame.origin.y, frame.size.width, frame.size.height); frame.size.height = pageContentView.frame.size.height; NSLog(@"%f; %f; %f; %f;", frame.origin.x, frame.origin.y, frame.size.width, frame.size.height); _pageContentView.frame = frame; NSLog(@"%f; %f; %f; %f;", _pageContentView.frame.origin.x, _pageContentView.frame.origin.y, _pageContentView.frame.size.width, _pageContentView.frame.size.height); And the NSLog outputs these values: 0.000000; 0.000000; 317.648956; 0.000000; 0.000000; 0.000000; 317.648956; 768.000000; 0.000007; 0.000004; 317.648956; 768.000000; Can you see? In the last row the x and y coordinates are a bit crazy... Where do these number come frome? What's the problem here?

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  • What shall be the code in xaml which makes a particular image to act as a button?

    - by Abhi
    Dear all I am new to Silverlight. And i have to make a demo application where in designing is done by using Microsoft Expression Blend 2 and developing should be done using Visual Studio(c++). Now i am first trying to become familiar with xaml files. So i was trying to make a simple demo where in i have to create a button and that button should be replace with an png image. In order to do so i tried with the mentioned below example. But i was not able to see anything in the screen. <UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="SilverlightApplication1.Page" Width="640" Height="480"> <Grid x:Name="LayoutRoot" Background="White"> <Button x:Name="LogoutButton" > <Button.Template> <ControlTemplate> <Image Source="SilverlightApplication1\bounce_photo.png" /> </ControlTemplate> </Button.Template> </Button> </Grid> Please let me know where i am wrong and what shall i do to obtain the result. With regards Abhineet Agarwal

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  • jQuery animate opacity doesn't work properly on IE

    - by fidoboy
    I'm trying to use animate function to change the height and opacity for a DIV. The div has a image background in CSS, it works fine on Firefox and Safari, but when i test it on IE the background is being removed. This is my code: if (jQuery.support.opacity) { jQuery('#list_box').animate({opacity: '1',height: '300px',top: newTop},{duration: 300}); } else { jQuery('#list_box').animate({filter: 'alpha(opacity=100)',height: '300px',top: newTop},{duration: 300}); } How can i fix it?

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  • BoundsChecker shows incorrect memory leak message

    - by Prabhu
    Hello All, I'm using BoundsChecker9.1 with visual c++. I have a class class Sample{ public: vector(AnotherClass) x; }. When I run my program the BoundsChecker tool reports all push_back() calls such as S.x.push_back(AnotherClass()) as memory leak.. Wouldn't all the elements in vector x will always be deallocated when the Sample class goes out of scope? If so, any idea about why BoundsChecker is showing them as memory leak?

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