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  • Delete rectangle using c#?

    - by C. Karunarathne
    Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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  • video processing with opencv

    - by mithila
    i'm trying to detect car in a video file.i can do background subtraction and the moving cars are visible as foreground object. but i can't draw rectangle around the car. how can i do it? or how can i say in a particular area of the frame there is a car/or there is no car now.please help.

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  • Fill WPF listbox with string array

    - by Archie
    Instead of adding each item one by one to the ListBox destinationList from the string array m_List like this: foreach (object name in m_List) { destinationList.Items.Add((string)name); } Is there any better way I can do it? I don't want to bind the data to the destinationList since I want to delete some entries from the ListBox later on.

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  • Naming Suggestions For A Function Providing Method Chaining In A Different Way

    - by sid3k
    I've coded an experimental function which makes passed objects chainable by using high order functions. It's name is "chain" for now, and here is a usage example; chain("Hello World") (print) // evaluates print function by passing "Hello World" object. (console.log,"Optional","Parameters") (returnfrom) // returns "Hello World" It looks lispy but behaves very different since it's coded in a C based language, I don't know if there is a name for this idiom and I couldn't any name more suitable than "chain". Any ideas, suggestions?

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  • Hibernate Criteria query on association

    - by DD
    Hi There, How would I go about executing the following Hibernate query using the criteria API. I have an object Parent with List children. I would like to search through all parents and find which parents contain a specified child. i.e. List findParent(Child child); Thanks.

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  • Java JList model

    - by Alaa
    How can I make a list model from a JList in order to be able to insert an item into it. I want to use this method: addElement(java.lang.Object item) I found an explanation here, but the problem is that ListModel is an interface and even if I write an implementation and override its method, I can't use the addElement() method

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  • EXC_BAD_ACCESS ( i am changing Orientation )

    - by Aishwarya
    When I put my iPhone on the table while running my application it crashes the second after I pick it up. Below is the crash log. (EXC_BAD_ACCESS) objc_msgSend -[UIWindow _shouldAutorotateToInterfaceOrientation:] -[UIWindow _updateToInterfaceOrientation:duration:force] -[UIWindow _updateInterfaceOrientationFromDeviceOrientation] -[UIWindow _handleDeviceOrientationChange:] _nsnote_callback __CFXNotificationPost _CFXNotificationPostNotification -[NSNotificationCenter postNotificationName:object:userInfo:] -[UIDevice setOrientation:] -[UIApplication handleEvent:withNewEvent:] _[UIApplication sendEvent:] _UIApplicationHandleEvent SendEvent PurpleEventTimerCallBack CFRunLoopRunSpecific CFRunLookRunInMode GSEventRunModel GSEventRun -[UIApplication _run] UIApplicationMain main Have you any idea what's the problem?

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  • flex: entering itemEditor when no value is assigned to data property in custom itemRenderer

    - by Markus
    Hi there, Im having a strange problem with my custom itemRenderer in the following Methode I assign the values to the cell. The problem is, when the side.element is still empty. In this case the itemEditor will not show up by default... override public function set data(side:Object):void{ super.data = side.element.toString(); choiceLabel.text = side.element.toString(); answer.selected = side.element.@answer; } Thanks for your help! Markus

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  • x:Static markup extension

    - by plotnick
    I have a Window.Resource object and the next statement <CollectionViewSource Source="{Binding Source={x:Static Application.Current}, Path=someProperty}" x:Key="someView" /> But what if I need to point to a public property in the Window's code-behind, not the App's? I've tried to use 'this' instead of 'Application.Current', but it doesn't work. Help me...

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  • How to get the selectionchange event in Qt

    - by Solitaire
    Hi.. I have a class inherited from Qwidget, now in that class I will be creating "Qlistview" object and filling up the items to view.. When the selection of items in the listview gets changed I want to get the "selectionchange" event to come.. So how can I achieve this.. pls tell me in brief... thanks

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  • Interview Question in C#

    - by amutha
    A Technical Lead asked me that ,he created a class,he declared object and initialized it.But some circumstance we may get "null reference" exception.He explained there are 1000 reasons for that and asked me to tell a single reason.I am unable to figure it out. What the reason(s) ,we may get such exception?

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  • How do I get ELMAH to work with SQL Server (permission problems)

    - by Gary McGill
    I've got ELMAH working on my (Cassini) development server, and was quite happy with it, but now that I'm trying to move everything to my production server (IIS7), the honeymoon looks like being over. I've got past the "gotcha" with IIS7, which frankly could have been better highlighted in the documentation, and if I just use the in-memory log then it works. However, I'm trying to get it to use the SQL Server log (as I do on my development system), and I'm getting an error along the lines of: The EXECUTE permission was denied on the object ELMAH_GetErrorsXml Well, fine. I know how to grant database permissions, but I'm really struggling to understand which user and which stored procs/tables I need to grant access to. The thing that's really confusing me is that I didn't have to do anything like this to get it to work on my development server. The only difference I can see is that on my development server it seems to connect as NT AUTHORITY\IUSR, whereas on my production server it seems to connect as NT AUTHORITY\NETWORK SERVICE. (It's just using a trusted connection so I've not explicitly configured it to do that - I presume it's to do with the web server). UPDATE: I've since established that because I'm using Cassini, it was actually logging in as me (an admin) and not IUSR, which explains why I didn't get any permission problems. On my development server, the IUSR account is a member of the public database role, and has access to the required database (again as "public"). There's no explicit granting of object-level permissions. [See update above - this is irrelevant]. On my production server, I've added NETWORK SERVICE in exactly the same way (public database role, explicit access to the database as "public"). Yet, I get this permission error. Why?!! [See update above - the only reason I don't get a permission error is because I'm running as an admin]. And, of course, if the fact that it works locally is just "luck", I will need to know which SPs/tables to grant access to. My guess would be all 3 SPs and not the table, but it would be good (again) to see some documentation that makes this explicit.

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  • Javascript static method intheritance

    - by Matteo Pagliazzi
    I want to create a javascript class/object that allow me to have various method: Model class Model.all() » static method Model.find() » static method Model delete() » instance method Model save() » instance method Model.create() » static that returns a new Model instance For static method I can define them using: Model.staticMethod(){ method } while for instance method is better to use: function Model(){ this.instanceMethod = function(){} } and then create a new instance or using prototype? var m = function Model(){ } m.prototype.method() = function(){ } Now let's say that I want to create a new class based on Model, how to inherit not only its prototypes but also its static methods?

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  • Javascript if (j === null) do nothing.

    - by Kyle Sevenoaks
    Hi, I'm using CurvyCorners to make my corners curvy in IE, only thing is that when it reads the CSS it takes all the webkit properties and shows me an alert curvyCorners.alert("No object with ID " + arg + " exists yet.\nCall curvyCorners(settings, obj) when it is created.");. How can I just set this if statement to do nothing? if (j === null) do nothing(); //but in real script Thanks :)

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  • How do you set the twitter user location in JTwitter?

    - by Gregg Reno
    I'm building some basic Twitter functionality into my app, and am using the JTwitter JAR to read and set status. It looks like there is a User class that can be used to set the location, but I just can't figure out how to set it with my GPS coordinates once I've got my Twitter object. Has anyone been able to set the user.location property using JTwitter? Thanks, -Gregg

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  • What's wrong with how I'm using NSDateFormatter?

    - by Thom Mahoney
    dateFormatter = [[NSDateFormatter alloc] init]; dateFormatter.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease]; [dateFormatter setDateFormat:@"EEE, d MMM yyyy HH:mm:ss zzz"]; NSString dateString = @"Tue, 08 Jun 2010 17:00:00 EDT"; NSDate eventDate = [dateFormatter dateFromString:dateString]; In this case the eventDate object is nil. Can somebody clue me in? This code used to work.

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  • Hibernate proxy serialization and receive on client side.

    - by Bubba88
    I lack understanding of how does the generated proxy class object (CGLib enhanced POJO) is transferred to the remote client and still pertains its ability to generate Lazy Init. Exceptions. Does that mean that there is some kind of contract that all the transferred objects of some kind of class (a proxy) will be reinstantiated as proxies again? Where does the client obtain those generated classes? Sorry, but I totally do not understand.

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  • What are the causes and solutions to a CS0122 error when sending onto an MSMQ queue from C#?

    - by Erick
    Having created a System.Messaging.MessageQueue using the MessageQueue(string queuePath) constructor, attempting to use MessageQueue.Send(obj) results in a 'Unable to generate a temporary class (result=1)' exception with the additional text: 'error CS0122: 'System.__ComObject' is inaccessible due to its protection level'. The queue itself has full control given to EVERYONE. When querying the MessageQueue object for it's read write permissions, it returns SendAndReceive. What causes this error and how do you resolve it?

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