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  • Animate a e.Graphics.DrawLine with arrowhead

    - by Fer
    I need to "animate" an arrow. It can go in any direction (up, down, left, right and diagonals) and the arrowhead will be at the end. It needs to appear as if it is growing from orgin to the end. To make matters more complicated it has to be in a user control so it is possible to add to the controls collection in the forms and remove it to delete it from the screen, and its background is really transparent (no color.transparent) so i can't paint the background to "clear" the previous line. I have it static already (drawn from origin to end) but i can't animate it. I tried to add a timer in the user control but I fail to get a correct algorithm to calculate the intermediate ends of the line while it is growing. Any help would be appreciated. Thanks

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  • Who deleted my sql table rows?

    - by vikasde
    I have an SQL table, from which data is being deleted. Nobody knows how the data is being deleted. I added a trigger and know the time, however no jobs are running that would delete the data. I also added a trigger whenever rows are being deleted from this table. I am then inserting the deleted rows and the SYSTEM_USER to a log table, however that doesnt help much. Is there anything better I can do to know who and how the data gets deleted? Would it be possible to get the server id or something? Thanks for any advice. Sorry: I am using SQL Server 2000.

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  • Can I use MFC objects in STL containers?

    - by Jesse Stimpson
    The following code doesn't compile for me in MSVC2005: std::vector<CMenu> vec(10); CMenu is an MFC menu object (such as a context menu). Through some testing I learned that CMenu does not have a public copy constructor. To do what I wanted to do, I needed to use a dynamic array. CMenu* menus = new CMenu[10]; // ... delete [] menus; Of course, now I've lost all the benefits of using an STL container. Do I have any other options?

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  • Looking at the C++ new[] cookie. How portable is this code?

    - by carleeto
    I came up with this as a quick solution to a debugging problem - I have the pointer variable and its type, I know it points to an array of objects allocated on the heap, but I don't know how many. So I wrote this function to look at the cookie that stores the number of bytes when memory is allocated on the heap. template< typename T > int num_allocated_items( T *p ) { return *((int*)p-4)/sizeof(T); } //test #include <iostream> int main( int argc, char *argv[] ) { using std::cout; using std::endl; typedef long double testtype; testtype *p = new testtype[ 45 ]; //prints 45 std::cout<<"num allocated = "<<num_allocated_items<testtype>(p)<<std::endl; delete[] p; return 0; } I'd like to know just how portable this code is.

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  • Error handling in controllers with MVC

    - by twrn
    Does it make sense to do error handling and logging inside actions methods or handle the OnException method inside the controllers. One way means writing try/catches in all the action methods even when there is nothing to be done to recover from the error. Handling this at the controller level would allow logging and redirection to an error handler page without writing try/catches inside all the action methods. Which method makes the most sense? Here is example code of try/catches in an action method. [HttpPost] public ActionResult Delete(int id) { using (new Tracer("Project Controller")) { try { Logger.Write("Deleting project"); projService.DeleteProject(id); TempData["message"] = "Project Deleted successfully"; } catch (System.Exception ex) { HandleException(ex, "Project could not be deleted."); } return RedirectToAction("List"); } }

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  • Restricting deletion with NHibernate

    - by FrontSvin
    I'm using NHibernate (fluent) to access an old third-party database with a bunch of tables, that are not related in any explicit way. That is a child tables does have parentID columns which contains the primary key of the parent table, but there are no foreign key relations ensuring these relations. Ideally I would like to add some foreign keys, but cannot touch the database schema. My application works fine, but I would really like impose a referential integrity rule that would prohibit deletion of parent objects if they have children, e.i. something similar 'ON DELETE RESTRICT' but maintained by NHibernate. Any ideas on how to approach this would be appreciated. Should I look into the OnDelete() method on the IInterceptor interface, or are there other ways to solve this? Of course any solution will come with a performance penalty, but I can live with that.

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  • Mixing HTML and STRUTS2 tags

    - by ryan
    I have a form which has both HMTL tags and struts tags. I use the HTML tags because of alignment issues with struts tags. <s:form action = "setNode" name = "processing" method ="POST"> <script> <!-- createTree(catArray); </script> <br/> <s:radio name="processOption" label="" list="{'Add','Move','Delete'}" ></s:radio> <s:textfield name="node" ></s:textfield> <s:submit name="Go" value=" Go " align="center" /> </s:form> the createTree function creates a tree form with HTML checkbox input types. The action triggers a java function. How do i see which checkboxes are checked?

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  • which is better, creating a view or a new table?

    - by Carson
    I have some demanding mysql queries that are needed to grap same datasets from several mysql tables. I am thinking of creating a table or view to gather all demanding columns from other tables, so as to increase performance. If I create that table, I may need to do extra insert / update / delete operation each time other tables updated. if I create view, I am worrying if the performance can be greatly improved. Because data from other tables are changing very frequently. Most likely, the view may need to be created first everytime before selecting it. Any ideas? e.g. how to cache? other extra measures I can do?

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  • Validating parameters to a bash script

    - by nickf
    I'm a total newbie to doing any bash scripting, but I came up with a basic one to help automate the process of removing a number of folders as they become unneeded. #!/bin/bash rm -rf ~/myfolder1/$1/anotherfolder rm -rf ~/myfolder2/$1/yetanotherfolder rm -rf ~/myfolder3/$1/thisisafolder This is evoked like so: ./myscript.sh <{id-number}> The problem is that if you forget to type in the id-number (as I did just then), then it could potentially delete a lot of things that you really don't want deleted. Is there a way you can add any form of validation to the command line parameters? In my case, it'd be good to check that a) there is one parameter, b) it's numerical, and c) that folder exists; before continuing with the script.

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  • What is problem with below class

    - by user258367
    class LinkedList { private: int data; LinkedList *ptr; public: LinkedList(int i_data) { data = i_data; ptr = 0; { ~LinkedList() { delete ptr ; } void insert(LinkedList *node) { while(this->next != 0) this = this->next; this->next = node; } I will be creating a head node like head = new LinkedList(4) and then will be calling like head->insert(new LinkedList(5)) and subsequently . Can you please tell me does above class represent a linkedlist . i think yes it has node which contain address of next node . Please correct me if i am wrong

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  • JQuery: Hover to show/hide individual object

    - by noe ruiz
    Basically I need to hover over an anchor to display the "data-meta" div. Works just fine but when there's multiple td and divs, one hover displays all of them. My question is how can I show/hide them individually? Code snippets below. <td> <a href="#">Item</a> <div class="data-meta"> <a href="#">Edit</a> | <a href="#">Disable</a> | <a href="#">Delete</a> </div> $(document).ready(function(){ $("td").hover( function () { $('.data-meta').show(); }, function () { $('.data-meta').hide(); }); });

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  • Is allocating a dynamic array without specifying size well formed code?

    - by Als
    The following simple program snippet gives compilation errorswith gcc-4.3.4. Program: int main() { char *ptr = new char[10]; char *ptr1 = new char[]; return 0; } Compilation errors: prog.cpp: In function ‘int main()’: prog.cpp:4: error: expected primary-expression before ‘]’ token prog.cpp:3: warning: unused variable ‘ptr’ prog.cpp:4: warning: unused variable ‘ptr1’ But the same compiles cleanly with MSVC without any diagnostic message. So my question is: Does the Standard allow an new [] to be called without specifying the size? Or this a bug in MSVC? Can someone provide a reference from the standard which will conclusively say that the above code example is ill-formed or well-formed? I have had a look at: 5.3.4 New [expr.new] & 18.4.1.2 Array forms [lib.new.delete.array] but couldnt find any conclusive evidence about the behavior.

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  • How to integrate Python scripting in my Android App (like SL4A)

    - by Seraphim's host
    I need to add scripting layer to my android App. So I can remotely prepare a script that my app download form a web service and execute on the user device. I found a interesting project called Scripting Layer for Android (SL4A) here: http://code.google.com/p/android-scripting/ I'm not sure I can execute Python script without installing the PythonForAndroid_r4.apk first. I can't force my customer to install that application! So my question is, can the SL4A layer be integrated in my app without the need to install other apk? I need to execute actions like update data in the DB, create/read/delete a file on the sd card... Not so complex but I see SL4A can do a lot of things like these. Other scripting libraries? EDIT: Found also MVEL: http://mvel.codehaus.org/ but I think it needs to be integrated to execute complex operations like accessing a DB...

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  • Drupal pass argument to page

    - by stotastic
    I have a custom Drupal module displaying some data in a table. Each row has a link which if clicked will delete the relevant row. Specifically, when the link is clicked it will take the user to a confirmation page. This page is really just a drupal form which says 'are you sure' with two buttons: 'Yes', 'No'. I figure I will need to pass the rowID to the confirmation page. My question: What is the typically way to pass data to a new page in Drupal 7? I guess I could just add the rowID to the URL and use the $_GET[] from the confirmation page... I don't think this is very safe and was wondering if there was a better 'Drupal' way. Thanks!

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  • SVN: How can I update an existing repository from an exported copy ?

    - by user206705
    Late one afternoon, I did an export of my project repository, and took home my work on my USB key. I've added many changes to the exported project, and now, having returned to the workplace, I want to update the repository with the project that I've now got. To complicate matters, I've made updates to the project in both the main trunk and a branch - and I'd like to update the repository to reflect all those changes. I'm new to SVN and have been relying on tortoise SVN, but I'm a bit lost now. Would I be best to delete the repository and recreate it from the copies/branches I now have? thanks

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  • ASP.NET web service architecture/structure

    - by Murugesan
    Hi All, I am going to create a new asp.net web service (.NET framework 2.0), the functionality of the web service is to recieve xml input, perform the relevant operation (add/modify/delete) based on the input and return codes which indicates the status of the operation. I am planning to implement two layer architecture (Business layer and database layer) for this web service, could anyone advise whether this is the right structure or any other structure would perform well than this. Basically I need some inputs on designing the web service. Thanks in advance. Thanks, Muru

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  • Django: Change models without clearing all data?

    - by Rosarch
    I have some models I'm working with in a new Django installation. Is it possible to change the fields without losing app data? I tried changing the field and running python manage.py syncdb. There was no output from this command. Renavigating to admin pages for editing the changed models caused TemplateSyntaxErrors as Django sought to display fields that didn't exist in the db. I am using SQLite. I am able to delete the db file, then re-run python manage.py syncdb, but that is kind of a pain. Is there a better way to do it?

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  • how to force nhibernate to set the foreign key of the child item?

    - by npeBeg
    i have a collection in the mapping: <bag name="Values" cascade="all-delete-orphan" lazy="false" inverse="true"> <key column="[TemplateId]"/> <one-to-many class="MyNamespace.Value, MyLib"/> </bag> the Value object has a foreign key [TemplateId]. both entities has their generator set to "identity". when i call session.Save() for the parent Template object, the Value objects has their [TemplateId] (the foreign key) set to zero, so an SQL exception appears. how do i forse nhibernate to set the FK value for the child items to the value of the inserted parent object?

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  • What is the result of "new int[ 0 ]"? [closed]

    - by ArunSaha
    Possible Duplicates: What does zero-sized array allocation do/mean? C++ new int[0] — will it allocate memory? int * p; p = new int[ 0 ]; What is the expected outcome when new is called for zero number of elements? Is the outcome defined or undefined? Further, is it okay to call delete [] p; on that pointer? What is the intuition/analogy to this situation of pointer to an array of zero elements? Thanks in advance. Regards, Arun

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  • Adding custom fields to users in django

    - by Gaurav
    I am the create_user() function that Django provides to create my users. Also I want to store additional information about the users. So I tried following the instructions given at http://docs.djangoproject.com/en/dev/topics/auth/#storing-additional-information-about-users but I cannot get it to work for me. Is there a step-by-step guide that I can follow to get this to work for me? Also, once I have added these custom fields, I would obviously need to add / edit / delete data from them. I cannot seem to find any instructions on how to do this.

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  • cannot render json without login. What should i do?

    - by logesh
    I am new to rails and i am trying few examples. I have login page using devise authentication and i have one more page where user can store their details, view, edit and delete the details. It is displayed in html format, once login is done. I want to produce json for iPhone so if i call as localhost:3000/posts/1.json it does not show json but after login i can see the json. so how shoud i do this? Pls help me.

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  • Map wont show rigth in Joomla

    - by user1653126
    I have the following code of a map using api google, I have tested the code in several html editor and its work perfectly, but when i upload in my web page doesn’t work. The map appears all zoomed in some random point in the ocean. I create an article in Joomla 1.5.20, paste the code. Its shows right in the preview but not in the web page. I disable filtering and use none editor and still won’t work. Thanks for the help. <!DOCTYPE html> <html> <head> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <style type="text/css"> html { height: 100% } body { height: 100%; margin: 0; padding: 0 } #map_canvas { height: 100% } </style> <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?key=AIzaSyBInlv7FuwtKGhzBP0oISDoB2Iu79HNrPU&sensor=false"> </script> <script type="text/javascript"> var map; // lets define some vars to make things easier later var kml = { a: { name: "Productor", url: "https://maps.google.hn/maps/ms?authuser=0&vps=2&hl=es&ie=UTF8&msa=0&output=kml&msid=200984447026903306654.0004c934a224eca7c3ad4" }, b: { name: "A&S", url: "https://maps.google.hn/maps/ms?ie=UTF8&authuser=0&msa=0&output=kml&msid=200984447026903306654.0004c94bac74cf2304c71" } // keep adding more if ye like }; // initialize our goo function initializeMap() { var options = { center: new google.maps.LatLng(13.324182,-87.080071), zoom: 9, mapTypeId: google.maps.MapTypeId.TERRAIN } map = new google.maps.Map(document.getElementById("map_canvas"), options); var ctaLayer = new google.maps.KmlLayer('https://maps.google.hn/maps/ms?authuser=0&vps=5&hl=es&ie=UTF8&oe=UTF8&msa=0&output=kml&msid=200984447026903306654.0004c94bc3bce6f638aa1'); ctaLayer.setMap(map); var ctaLayer = new google.maps.KmlLayer('https://maps.google.hn/maps/ms?authuser=0&vps=2&ie=UTF8&msa=0&output=kml&msid=200984447026903306654.0004c94ec7e838242b67d'); ctaLayer.setMap(map); createTogglers(); }; google.maps.event.addDomListener(window, 'load', initializeMap); // the important function... kml[id].xxxxx refers back to the top function toggleKML(checked, id) { if (checked) { var layer = new google.maps.KmlLayer(kml[id].url, { preserveViewport: true, suppressInfoWindows: true }); google.maps.event.addListener(layer, 'click', function(kmlEvent) { var text = kmlEvent.featureData.description; showInContentWindow(text); }); function showInContentWindow(text) { var sidediv = document.getElementById('content_window'); sidediv.innerHTML = text; } // store kml as obj kml[id].obj = layer; kml[id].obj.setMap(map); } else { kml[id].obj.setMap(null); delete kml[id].obj; } }; // create the controls dynamically because it's easier, really function createTogglers() { var html = "<form><ul>"; for (var prop in kml) { html += "<li id=\"selector-" + prop + "\"><input type='checkbox' id='" + prop + "'" + " onclick='highlight(this,\"selector-" + prop + "\"); toggleKML(this.checked, this.id)' \/>" + kml[prop].name + "<\/li>"; } html += "<li class='control'><a href='#' onclick='removeAll();return false;'>" + "Limpiar el Mapa<\/a><\/li>" + "<\/ul><\/form>"; document.getElementById("toggle_box").innerHTML = html; }; // easy way to remove all objects function removeAll() { for (var prop in kml) { if (kml[prop].obj) { kml[prop].obj.setMap(null); delete kml[prop].obj; } } }; // Append Class on Select function highlight(box, listitem) { var selected = 'selected'; var normal = 'normal'; document.getElementById(listitem).className = (box.checked ? selected: normal); }; </script> <style type="text/css"> .selected { font-weight: bold; } </style> </head> <body> <div id="map_canvas" style="width: 80%; height: 400px; float:left"></div> <div id="toggle_box" style="position: absolute; top: 100px; right: 640px; padding: 10px; background: #fff; z-index: 5; "></div> <div id="content_window" style="width:10%; height:10%; float:left"></div> </body> </html>

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  • LRU LinkedHashMap that limits size based on available memory

    - by sanity
    I want to create a LinkedHashMap which will limit its size based on available memory (ie. when freeMemory + (maxMemory - allocatedMemory) gets below a certain threshold). This will be used as a form of cache, probably using "least recently used" as a caching strategy. My concern though is that allocatedMemory also includes (I assume) un-garbage collected data, and thus will over-estimate the amount of used memory. I'm concerned about the unintended consequences this might have. For example, the LinkedHashMap may keep deleting items because it thinks there isn't enough free memory, but the free memory doesn't increase because these deleted items aren't being garbage collected immediately. Does anyone have any experience with this type of thing? Is my concern warranted? If so, can anyone suggest a good approach? I should add that I also want to be able to "lock" the cache, basically saying "ok, from now on don't delete anything because of memory usage issues".

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  • How to determine, upon launch, whether the app crashed the last time it quit?

    - by enchilada
    One of the crash reporter frameworks I've found does it like this: If there exist crash reports in the ~/Library/Logs/CrashReporter folder for the app, it determines that a crash occurred before. Then it allows the user to send the developer the crash log. And the finally, it deletes those logs. It is this deletion that is bothering me. It's not acceptable to me. Maybe the user wants to look at those logs later. It is simply rude to the user to just delete his crash logs. So I'm looking for a better way to determine the crash. It doesn't really work to store the last read crash logs in the user defaults or the user data, because that would mean that if the user deletes the data and defaults (which he has a right to do whenever he or she wishes), and then launches the app, it will be detected as crashed the last time it was quit. So this doesn't work. Any ideas?

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  • Sharepoint lockout

    - by user301751
    Recently a guy from our 3rd line team thought it would be funny to delete my account from AD. This has now been re-added. Everything is back to normal apart from my Access to Sharepoint sites. I am getting "The file exists. (Exception from HRESULT: 0x80070050)" Error on all sites. After some googleing I came across a guy with the same issue and it was an issue with the SID being different from my old account. Since this I deleted my account from Site Administrators and re-added. This would refresh the SID with the new one. I also check on the Content database that the site ID matched using the following transactions and the SIDs match. select s.Id, w.FullUrl from Sites s inner join Webs w on s.RootWebId = w.Id select * from UserInfo where tp_Login='domain\username' and tp_SiteID='' I am now a bit clueless.

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