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  • TreeNodes don't get collected with weakevent solution

    - by Marcus
    Hi, When I use this method http://stackoverflow.com/questions/1089309/weak-events-in-net (by Egor) to hook up a event i a inherited treenode, the tree node never gets collected, is there any speciall case with tree nodes and GC? public class MyTreeNode : TreeNode { public MyTreeNode(Entity entity) { entity.Children.ListChanged += new ListChangedEventHandler(entityChildren_ListChanged).MakeWeak(eh => entity.Children.ListChanged -= eh); } } Entity.Children is a bindinglist. I made tests with a destructor on MyTreeNode and invoking GC.Collect(), with the weak eventhandler the treenode never gets collected but i DOES get collected WIHTOUT the weak eventhandler.

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  • Android: who can help me with setting up this google maps class please??

    - by Capsud
    Hi, Firstly this has turned out to be quite a long post so please bear with me as its not too difficult but you may need to clarify something with me if i haven't explained it correctly. So with some help the other day from guys on this forum, i managed to partially set up my 'mapClass' class, but i'm having trouble with it and its not running correctly so i would like some help if possible. I will post the code below so you can see. What Ive got is a 'Dundrum' class which sets up the listView for an array of items. Then ive got a 'dundrumSelector' class which I use to set up the setOnClickListener() methods on the listItems and link them to their correct views. DundrumSelector class.. public static final int BUTTON1 = R.id.anandaAddressButton; public static final int BUTTON2 = R.id.bramblesCafeAddressButton; public static final int BUTTON3 = R.id.brannigansAddressButton; public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); int position = getIntent().getExtras().getInt("position"); if(position == 0){ setContentView(R.layout.ananda); }; if(position == 1){ setContentView(R.layout.bramblescafe); }; if(position == 2){ setContentView(R.layout.brannigans); Button anandabutton = (Button) findViewById(R.id.anandaAddressButton); anandabutton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent myIntent = new Intent(view.getContext(),MapClass.class); myIntent.putExtra("button", BUTTON1); startActivityForResult(myIntent,0); } }); Button bramblesbutton = (Button) findViewById(R.id.bramblesCafeAddressButton); bramblesbutton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent myIntent = new Intent(view.getContext(),MapClass.class); myIntent.putExtra("button", BUTTON2); startActivityForResult(myIntent, 0); } }); etc etc.... Then what i did was set up static ints to represent the buttons which you can see at the top of this class, the reason for this is because in my mapClass activity I just want to have one method, because the only thing that is varying is the coordinates to each location. ie. i dont want to have 100+ map classes essentially doing the same thing other than different coordinates into the method. So my map class is as follows... case DundrumSelector.BUTTON1: handleCoordinates("53.288719","-6.241179"); break; case DundrumSelector.BUTTON2: handleCoordinates("53.288719","-6.241179"); break; case DundrumSelector.BUTTON3: handleCoordinates("53.288719","-6.241179"); break; } } private void handleCoordinates(String l, String b){ mapView = (MapView) findViewById(R.id.mapView); LinearLayout zoomLayout = (LinearLayout)findViewById(R.id.zoom); View zoomView = mapView.getZoomControls(); zoomLayout.addView(zoomView, new LinearLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); mapView.displayZoomControls(true); mc = mapView.getController(); String coordinates[] = {l, b}; double lat = Double.parseDouble(coordinates[0]); double lng = Double.parseDouble(coordinates[1]); p = new GeoPoint( (int) (lat*1E6), (int) (lng*1E6)); mc.animateTo(p); mc.setZoom(17); mapView.invalidate(); } Now this is where my problem is. The onClick() events don't even work from the listView to get into the correct views. I have to comment out the methods in 'DundrumSelector' before I can get into their views. And this is what I dont understand, firstly why wont the onClick() events work, because its not even on that next view where the map is. I know this is a very long post and it might be quite confusing so let me know if you want any clarification.. Just to recap, what i'm trying to do is just have one class that sets up the map coordinates, like what i'm trying to do in my 'mapClass'. Please can someone help or suggest another way of doing this! Thanks alot everyone for reading this.

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  • How to fire an event in the code behind when a div's visibility changed?

    - by Vibin Jith
    As part of my web project ,I have designed a div tag like a window form as Shown in the figure.I just want to fill details in the textbox when the user clicks the edit label.The div is Invisible at first time. when the user clicks on edit label ,the form-div get fadein(visible). During this time an event should fired in the code behind. But I am not getting any events in the code behind like visisbility changed or some thing like that. Where can i get this event. Simply i want to display appropriate company name in the textbox in the div , when the user clicks the edit label in each row.

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  • Is it possible that __doPostBack() would ever send a GET request?

    - by Galilyou
    I'm having a problem with telerik RadGrid, I want to enable multiple row selection. I also want to go to the server whenever a row is selected or deselected. I created a javascript function to handle the Grid's client side events (OnRowSelected, and OnRowDeSelected). The functions look like this: function onOperationRowSelected(sender, eventArgs) { __doPostBack("<%=myControl.ClientID %>", "rowSelected:" + eventArgs.get_itemIndexHierarchical()); } The other function is very similar, the only difference is that it sends the string "rowDeselcted" instead of "rowSelected". On Page_Load I check to see if the request is a Post request using "IsPostBack" and if so, I check to see if it's a rowSelected or rowdeselected. My problem is when I select a first raw on my grid, a Post request happens (which is expected), however, when I select the second row, a GET request is issued, which (obviously) will result in IsPostBack returning false. What am I missing here?

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  • Making your class an event source in Java

    - by Crystal
    I'm making a custom button in Java that has two states, mousePressed, and mouseReleased. At the same time, if I wanted to reuse this button, so that other event listeners can register with it, are these the appropriate steps I should do: override addActionListener(ActionListener action) override removeActionListener(ActionListener action) have a private variable like List <ActionListener> list = new List <ActionListener>() to keep track of when events get added and some sort of function with for loop to run all the actions: public void runListeners() { for (ActionListener al : list) { al.actionPerfomed; } } I'm not really sure if this is the way you can do it or if there are other things I am missing. Like does my custom class have to be implements ActionListener? Thanks.

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  • Synclock a section of code while waiting for ShowDialog to return

    - by clawson
    I'm having trouble working out how to lock my application out of a section of code while it waits for a response from an external program. I've used Synclock on a section of code with the Me object in the expression. In this Synclock I call an overridden ShowDialog method of a dialog box, which has a timeout parameter, but does return the value from the underlying ShowDialog function call ,once the timer is setup. Works like this. SyncLock Me Dim frmDlgWithTimeout As New frmDlgWithTimeout ' dialog box with overridden ShowDialog ' Dim res As DialogResult = frmDlgWithTimeout.ShowDialog(10 * 1000) ' 10 sec timeout ' End SyncLock Now, external programs may raise events that bring my application to this Synclock but it doesn't prevent it from entering it, even though the ShowDialog function hasn't returned a value (and hence what I thought would keep the section of code locked). There is only one instance of the object that is used for lock in the program. Your help is greatly appreciated.

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  • flex: is there a way to dispach a custom event from one loaded flex application to the other ?

    - by ufk
    Hello. I have an HTML page that loads two different SWF files. is there a way to dispatch a custom event from one flex application to another ? to create a custom event I extend the Event class and I add another variable to the constructor called params which is an Object. I use EventDispatcher to dispatch the events. I have no idea how to do that between one flex application to the other. is it even possible ? If it's not, is there any other way that these two flex applications can communicate without opening a LocalConnection ? Using flex 4.5 thanks!

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  • Odd visual issue with ListView item layout with two pressable pieces

    - by jnylen
    I wanted to make a ListView where the items have two pressable pieces, like the layouts that show up in a couple of places in the stock Android phone/contacts application: I have the layout working fine, including handling events from each piece separately, except for a visual issue when the smaller piece is pressed. In my application the smaller piece only gets a small ellipse for the background when it is pressed, like this: Note that is actually not my application - that is NubDial, but my application has the same problem. Since NubDial uses the exact same XML layout as the phone app, I'm not sure how relevant the list item layouts are, but here they are anyway: Contacts list: contacts_list_item.xml NubDial: contacts_list_item.xml Does anybody know what might be happening there?

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  • Simple Windows.Forms binding is failing using framework 4.0.

    - by jyoung
    This works under the .net framework 3.5 client. This fails under the .net framework 4.0 client. Was I doing something that was illegal under 3.5 but just happened to work, or is this a bug? Note that in my project 'PropInt' does not raise change events so using ctx[obj1.PropObj2, "PropInt"] is not an option. public class Obj1 { public Obj2 PropObj2 { get; set; } public Obj1() { PropObj2 = new Obj2(); } } public class Obj2 { public int PropInt { get; set; } } static class Program { [STAThread] static void Main() { var ctx = new BindingContext(); var obj1 = new Obj1(); var x1 = ctx[obj1, "PropObj2.PropInt"]; } }

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  • What's the best way to measure and track performance over various calls at runtime?

    - by bitcruncher
    Hello. I'm trying to optimize the performance of my code, but I'm not familiar with xcode's debuggers or debuggers in general. Is it possible to track the execution time and frequency of calls being made at runtime? Imagine a chain of events with some recursive calls over a fraction of a second. What's the best way to track where the CPU spends most of its time? Many thanks. Edit: Maybe this is better asked by saying, how do I use the xcode debug tools to do a stack trace?

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  • Data mining logs to locate a bug

    - by gooli
    I'm working on a data distribution application which receives data from a source and distributes that data to multiple target application. After successfully distributing several messages each second for 8 days, it missed a single message and did not deliver it properly to the clients. As I was looking at the logs I tried to find something there that was special for the time the miss happend - either in the data, its rate or some other condition but couldn't find anything. Is there any data mining technique I can use to identify how that specific event differs from other events?

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  • Pull image of rendered HTML from a specific browser

    - by Geo Ego
    I am working on an app that will be able to pull an image of rendered HTML from a specific browser. I would like the user to be able to select a specific browser to render an HTML file in, and capture the rendered output in an image file. I am starting with IE8, and I'm not sure where to begin to get the actual rendered output. I can easily open the file in that browser with Process.Start(), but I don't know how to return the rendered output. I have looked a little bit at sinking events, but I don't understand how that works or if that's the right way to go. I would just like some direction, and perhaps some resources to send me on the right path.

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  • WPF TreeView PreviewMouseDown on TreeViewItem

    - by imekon
    If I handle the PreviewMouseDown event on TreeViewItem, I get events for everything I click on that TreeViewItem include the little +/- box to the left (Windows XP). How can I distinguish that? I tried the following: // We've had a single click on a tree view item // Unfortunately this is the WHOLE tree item, including the +/- // symbol to the left. The tree doesn't do a selection, so we // have to filter this out... MouseDevice device = e.Device as MouseDevice; // This is bad. The whole point of WPF is for the code // not to know what the UI has - yet here we are testing for // it as a workaround. Sigh... // This is broken - if you click on the +/- on a item, it shouldn't // go on to be processed by OnTreeSingleClick... ho hum! if (device.DirectlyOver.GetType() != typeof(Path)) { OnTreeSingleClick(sender); } What I'm after is just single click on the tree view item excluding the extra bits it seems to include.

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  • XMLHttpRequest inside an oject: how to keep the refrence to "this"

    - by Julien
    I make some Ajax calls from inside a javascript object.: myObject.prototye = { ajax: function() { this.foo = 1; var req = new XMLHttpRequest(); req.open('GET', url, true); req.onreadystatechange = function (aEvt) { if (req.readyState == 4) { if(req.status == 200) { alert(this.foo); // reference to this is lost } } } }; Inside the onreadystatechange function, this does not refer to the main obecjt anymore, so I don't have access to this.foo. Ho can I keep the reference to the main object inside XMLHttpRequest events?

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  • Event handling for keyboard strokes

    - by david
    Hey, I'm trying to get familiar with the whole keyboard event detection thing. Here's my sample code. <fx:Script> <![CDATA[ import flash.events.KeyboardEvent; import mx.controls.Alert; private function init():void{ addEventListener(KeyboardEvent.KEY_DOWN,reportKeyDown); } private function reportKeyDown(event:KeyboardEvent):void { Alert.show("a key was pressed"); } ]]> </fx:Script> As you can see, I'm at stage 0 of playing around with it, but it won't work. Anyone has any idea what I should be doing instead? Thanks

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  • iPhone: how do I set up a clear window-size "blocker view"?

    - by Ben
    I feel like this should be obvious to me, but for some reason I can't figure this out. I have a navigation interface with nav bar, tool bar, and primary view. Sometimes the user takes an action that causes a progress indicator to appear in the middle of the view. While the progress indicator (which is a custom UIView) in spinning in the middle, I want no touch input to be allowed to go to any of the underlying interface (main view, nav bar, toolbar, etc). But this doesn't seem trivial. I've tried (and failed) to create a simple view whose only job is to swallow touch input and use it as a window subview-- no dice, it never gets the touch events (and yes, it does have userInteractionEnabled). I've tried to bolt it on as a transparent modal view controller, but those don't seem to ever be transparent. Thoughts? What am I missing? Thanks!

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  • Mimic property/list changes on an object on another object

    - by soundslike
    I need to mimic changes (property/list) changes on an object and then apply it to another object to keep the structure/property the same. In essence it's like cloning etc. the biz rules require certain properties to not be applied to the other object, so I can't just clone the object otherwise this would be easy. I've already walked the source object to get INotifyPropertyChanged and IListChanged events, so I have the "source" and the args (Property or List) changed event notifications. Given that I guess I could build a reflection "hierarchy path" starting from the top level of the source object to get to the Property or List changed "source" (which could be several levels deep). Ignoring for the moment that certain object properties should not propagate to the other object, what's a way to build this "path"? Is a brute force top level down to build the "path" (and discard on the way back up if we don't hit the original changed event "source") the only way to do it? Any clever ideas on how to mimic changes from one object to another object?

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  • jQuery hyperlinks - href value?

    - by Tom
    Hi, On my website I use jQuery to hook the events of elements, namely hyperlinks. As these hyperlinks only perform actions on the current page, and do not lead anywhere, I have been putting a href attribute of "#" in: <a href="#">My Link</a> However in some browsers this causes the page to scroll right to top which is obviously undesirable behaviour. I've tried using a blank href value, or not including one, but then the mouse does not change to the hand cursor upon hovering. What should I put in there?

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  • click-event doesn't fire if blur changes layout

    - by rag
    I have a form with blur-events bound to the required fields. Then there is a "Cancel" Button which simply calls an URL (button is an image with click-event). When leaving one of the required fields a warning is written to the page saying that field xy is required. - this causes a layout shift, meaning all the fields and the buttons are moved down a little bit because of the text inserted above. The tricky thing is this: when the focus is in an empty but required field and you click the cancel button, the required-warning is written to the screen but the click-event on the cancel button doesn't fire. I think this is due to the layout shift. The mouse cursor doesn't hover over the button anymore, because the button scrolled down. Has anyone a good idea how i could solve this?

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  • What's a good way to create an Event Calendar

    - by iFloh
    Hi, I want to create an Event Calendar for my iPhone App. In a first instance the Event Calendar is supposed to list the Events and have a Details View with additional info. It is also supposed to contain an action to trasfer a specific event to the iPhone Calendar. First thoughts go towards using a UITableView where I make the event dates as sections. Since the Calendar is supposed to span many month I am unsure whether this really is the best way to go about it. Any suggestions? Do you probably know some sample code that I might use ? thanks in advance

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  • Redirecting input to another view

    - by Jon
    My application is working fine on the normal iPad display, but I also need to output to VGA out. When I do this, I need to add the view to the external screen's window which seems to mean that I can't use it to accept input from the iPad screen. I want to redirect input from the iPad's window to the window displaying on the external screen. As far as I can tell there's no standard method of doing this. I've tried overriding hitTest on the iPad's window view to send it to the window on the external display, but the coordinates seem to get messed up in the process which makes it nigh unusable. I've also tried subclassing the iPad's UIWindow and catching events in sendEvent, then trying to send them to the external window, but this doesn't seem to work at all. Any help would be appreciated, I'm happy to post any code you would like to see. Thanks, Jon

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  • GUI designers! - got suggestions for a GUI modelling diagram language?

    - by naugtur
    Refering to this question I asked a while ago: UI functionality modeling languages It looks like there is no good-enough solution. I decided to develop one. (and prepare a set of elements for DIA or something) I'm sure it will require a good insight in peoples' experiences and problems in designing functionally complicated GUIs. I've got some ideas already, but I'd like to hear from You what You'd expect from a GUI functionality modelling language. Clarification: It's functionality modelling, so it's not about where I put a button. It's about objects that have some events binded, and the interface behaviour logic. If You think (just as I do) that UML is far from useful for such purposes - feel free to put Your expectations here. I'll try to meet them. ( not necessarily in person;) ) Remember - there is no such thing as a wrong answer to this question

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  • Add programmatically clickable Button with custom Views layouted in InterfaceBuilder

    - by allisone
    I have a UIScrollView. In there I add buttons programmatically. Right now I just use UIButton and set one title. But I need to have an UIImage View in there, that will change upon certain events, Text that will change too etc. and I would like to style that in Interface Builder, but I can't figure out how to do this. Which class should I extend, and what kind of xib should I create and what in there, so that in the end I can make the right connections and so that I can listen for UIControlEventTouchDown of that Button.

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  • jquery calendarpicker callback pass querystring

    - by user577318
    Trying to use this CalendarPicker source and docs here: http://bugsvoice.com/applications/bugsVoice/site/test/calendarPickerDemo.jsp I need to be able to pass the date selected as query string variable of "searchdate" and reload page also updating current date for calendarPicker with querystring date on page reload. This is what I have so far: jQuery(document).ready(function() { var calendarPicker = jQuery("#calendarpicker").calendarPicker({ monthNames:["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"], dayNames: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"], years:0, months:6, days:5, showDayArrows:true, callback:function(cal) { // Simple output to test calendar date change jQuery("#output").html("Selected date: " + cal.currentDate.getFullYear()+"-"+cal.currentDate.getMonth()+"-"+cal.currentDate.getDate() ); // Not working well since it also includes arrows from datepicker as selectors jQuery(".calDay").children().click(function() { window.location.href="mysite.com?searchdate="+cal.currentDate.getFullYear()+"-"+cal.currentDate.getMonth()+"-"+cal.currentDate.getDate(); }); } }); Any help greatly appreciated. Can this be done with ajax? I am attempting to update a table of events by datepicker.

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  • Weird behavior of an ASP.NET MVC application - track of errors

    - by Alex
    Before migrating from ASP.NET WebForms I had a very good way to monitor all my application errors in the Events Log (Administrative Tools). But now after moving to asp.net MVC, all I get is the same mistake occurring every minute (something about Site Master). I know it's not right, because there are other mistakes, but they are not displayed. I purposefully put in division by zero operation, and it didn't track it. I had to implement the OnException method of a controller, and send e-mails with error details which is very inconvenient. How can I solve this problem?

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