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• WPF unwanted grid splitter behaviour

  - by SaphuA

  Hello, I have a simple grid with 3 columns (one of which contains a grid splitter). When resizing the grid and the left column reaches its minimum width, instead of doing nothing it increases the width of the right column. Could anyone help me stop this? I can't set the max width of the right column, because the grid itself also resizes. Here's some sample code that shows the problem. While resizing, move the mouse over the red area: XAML: <Grid DockPanel.Dock="Top" Height="200"> <Grid.ColumnDefinitions> <ColumnDefinition MinWidth="200" Width="*" /> <ColumnDefinition Width="3" /> <ColumnDefinition MinWidth="120" Width="240" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="*" /> </Grid.RowDefinitions> <Rectangle Fill="Red" Grid.Row="0" Grid.Column="0" /> <DockPanel LastChildFill="True" Grid.Row="0" Grid.Column="2" > <Rectangle DockPanel.Dock="Right" Width="20" Fill="Blue" /> <Rectangle Fill="Green" /> </DockPanel> <GridSplitter Background="LightGray" Grid.Row="0" Grid.Column="1" Height="Auto" Width="Auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> </Grid>

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• jerky animation using Core Animation

  - by Paul from Boston

  In my iPhone app, I am trying to get some red and white stripes that are scrolling across the screen to animate smoothly when the speed of the stripes gets high. In my app the user starts the animation and changes the scrolling speed by a finger swipe and changes the width of the stripes by a two finger pinch. Animation is stopped in response to a double tap. If the speed gets high or the stripes get narrow the animation is no longer smooth to the eye. The edges of the stripes seem to jump around. The animation is simple. I draw the stripes in a layer that's a bit larger than the screen. I then set up an animation that moves the layer position by exactly the distance from one red stripe to the next. The duration is set by the speed of the finger swipe and the repeat count is 1. When the animation stops the delegate checks a flag to see if the user wants to stop the scrolling. If not, the animation is restarted again for one cycle. Are there better ways of doing this so that the animation is smooth at high speeds or with narrow stripes? Thanks--

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• iPhone core data problem : referenceData64 only defined for abstract class

  - by occe

  I have an application that downloads/parses a big XML file and store the information using core data (approx. 4000 objects (entities)). The XML is loaded/parsed in a different thread, which has its own NSManagedObjectContext. When trying to save the entities to the persistent store, I sometimes get the following error (about 20%) 2010-03-03 23:41:42.802 xxx[7487:4203] Exception in XML saving 2010-03-03 23:41:42.802 xxx[7487:4203] Description: * -_referenceData64 only defined for abstract class. Define -[NSTemporaryObjectID_default _referenceData64]! 2010-03-03 23:41:42.803 xxx[7487:4203] Name: NSInvalidArgumentException 2010-03-03 23:41:42.804 xxx[7487:4203] UserInfo: (null) 2010-03-03 23:41:42.805 xxx[7487:4203] Reason: * -_referenceData64 only defined for abstract class. Define -[NSTemporaryObjectID_default _referenceData64]! I have a simple integer to keep track of the entities the application creates compared to the insertedObjects property in the NSManagedObjectContext before saving, and when I get the error, these numbers do not match, insertedObjects in the NSManagedObjectContext is missing about 10 entities. I do not know how I should continue to investigate this problem, anyone has any idea how to fix this? Thanks /oscar

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• Why is jQuery so widely adopted versus other Javascript frameworks?

  - by Andrew Moore

  I manage a group of programmers. I do value my employees opinion but lately we've been divided as to which framework to use on web projects. I personally favor MooTools, but some of my team seems to want to migrate to jQuery because it is more widely adopted. That by itself is not enough for me to allow a migration. I have used both jQuery and MooTools. This particular essay tends to reflect how I feel about both frameworks. jQuery is great for DOM Manipulation, but seem to be limited to helping you do that. Feature wise, both jQuery and MooTools allow for easy DOM Selection and Manipulation: // jQuery $('#someContainer div[class~=dialog]') .css('border', '2px solid red') .addClass('critical'); // MooTools $('#someContainer div[class~=dialog]') .setStyle('border', '2px solid red') .addClass('critical'); Both jQuery and MooTools allow for easy AJAX: // jQuery $('#someContainer div[class~=dialog]') .load('/DialogContent.html'); // MooTools (Using shorthand notation, you can also use Request.HTML) $('#someContainer div[class~=dialog]') .load('/DialogContent.html'); Both jQuery and MooTools allow for easy DOM Animation: // jQuery $('#someContainer div[class~=dialog]') .animate({opacity: 1}, 500); // MooTools (Using shorthand notation, you can also use Fx.Tween). $('#someContainer div[class~=dialog]') .set('tween', {duration: 500}) .tween('opacity', 1); jQuery offers the following extras: Large community of supporters Plugin Repository Integration with Microsoft's ASP.NET and VisualStudio Used by Microsoft, Google and others MooTools offers the following extras: Object Oriented Framework with Classic OOP emulation for JS Extended native objects Higher consistency between browsers for native functions support. More easy code reuse Used by The World Wide Web Consortium, Palm and others. Given that, it seems that MooTools does everything jQuery does and more (some things I cannot do in jQuery and I can in MooTools) but jQuery has a smaller learning curve. So the question is, why did you or your team choose jQuery over another JavaScript framework? Note: While I know and admit jQuery is a great framework, there are other options around and I'm trying to take a decision as to why jQuery should be our choice versus what we use right now (MooTools)?

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• Adding visible "Markers" to represent Geopoints to a MapView using ItemizedOverlay in Android

  - by LordSnoutimus

  Hello, I am building an application which stores GPS locations in a SQLite database and then outputs the data onto a MapView using an Overlay by drawing a red line between the points. I want to be able to show graphical markers (images) for each of these points as well as the red line. My code is as follows: public class MyOverlay extends ItemizedOverlay { // private Projection projection; private Paint linePaint; private Vector points; public MyOverlay(Drawable defaultMarker) { super(defaultMarker); points = new Vector<GeoPoint>(); //set colour, stroke width etc. linePaint = new Paint(); linePaint.setARGB(255, 255, 0, 0); linePaint.setStrokeWidth(3); linePaint.setDither(true); linePaint.setStyle(Style.FILL); linePaint.setAntiAlias(true); linePaint.setStrokeJoin(Paint.Join.ROUND); linePaint.setStrokeCap(Paint.Cap.ROUND); } public void addPoint(GeoPoint point) { populate(); points.addElement(point); } //public void setProjection(Projection projection) { // this.projection = projection; // } public void draw(Canvas canvas, MapView view, boolean shadow) { populate(); int size = points.size(); Point lastPoint = new Point(); if(size == 0) return; view.getProjection().toPixels(points.get(0), lastPoint); Point point = new Point(); for(int i = 1; i<size; i++){ view.getProjection().toPixels(points.get(i), point); canvas.drawLine(lastPoint.x, lastPoint.y, point.x, point.y, linePaint); lastPoint = point; } } @Override protected OverlayItem createItem(int arg0) { // TODO Auto-generated method stub return null; } @Override public int size() { // TODO Auto-generated method stub return 0; } } What would be the easiest way to implement adding markers for each GeoPoint? Thanks

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• iPhone SDK : UIImageView - Collapsing animation

  - by chris.o.

  Hi All, I'm trying to animating across the screen a horizontal bar with a color gradient. For simplicity, I chose to make a png of the fully extended bar, assign it to a UIImageView, and (attempt to) animate resizing of it using a UIView animation. The problem is that in the "closed" state of the Image, the portion of the image showing is not the part that I want. The image is arranged so that from L to R, a white to red color gradient occurs. The right side (about 20 pixels) is solid red and is the part I want to show when the bar is "collapsed". I'm trying to extend the image out by about 100 pixels to its full width. I referenced the "Buy Now" button example for my code as it seemed relevant" http://stackoverflow.com/questions/1669804/uibutton-appstore-buy-button-animation My code: [UIView beginAnimations:@"barAnimation" context:nil]; [UIView setAnimationDuration:0.6]; CGRect barFrame = bookBar.bounds; if (fExtendBar) { barFrame.origin.x -= 100; barFrame.size.width += 100; } else { barFrame.origin.x += 100; barFrame.size.width -= 100; } bookBar.frame = barFrame; [UIView commitAnimations]; I feel like this should be possible, maybe by setting an "offsetOfImage" to display in the UIImageView, but I can't seem to make it work. Also, I've noticed that the behavior is kind of consistent with what happens in Interface Builder when you resize an image. Then again, I would think there would be a way to override this behavior programmatically. Any suggestions (including other approaches) are welcome. Thanks, chris.o.

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• How does one convert 16-bit RGB565 to 24-bit RGB888?

  - by jleedev

  I’ve got my hands on a 16-bit rgb565 image (specifically, an Android framebuffer dump), and I would like to convert it to 24-bit rgb888 for viewing on a normal monitor. The question is, how does one convert a 5- or 6-bit channel to 8 bits? The obvious answer is to shift it. I started out by writing this: uint16_t buf; while (read(0, &buf, sizeof buf)) { unsigned char red = (buf & 0xf800) >> 11; unsigned char green = (buf & 0x07c0) >> 5; unsigned char blue = buf & 0x003f; putchar(red << 3); putchar(green << 2); putchar(blue << 3); } However, this doesn’t have one property I would like, which is for 0xffff to map to 0xffffff, instead of 0xf8fcf8. I need to expand the value in some way, but I’m not sure how that should work. The Android SDK comes with a tool called ddms (Dalvik Debug Monitor) that takes screen captures. As far as I can tell from reading the code, it implements the same logic; yet its screenshots are coming out different, and white is mapping to white. Here’s the raw framebuffer, the smart conversion by ddms, and the dumb conversion by the above algorithm. (By the way, this conversion is implemented in ffmpeg, but it’s just performing the dumb conversion listed above, leaving the LSBs at all zero.) I guess I have two questions: What’s the most sensible way to convert rgb565 to rgb888? How is DDMS converting its screenshots?

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• How to remove space between chart area and plot area?

  - by Gopalakrishnan Subramani

  I am using chartingToolKit:Chart control. I want to remove the white space appear in between the chart and plot area. Attached the WPF sample and image of area to be removed. <Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525" xmlns:chartingToolkit="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit"> <Grid> <chartingToolkit:Chart x:Name="chart" Width="500" Height="300" Margin="0, 0, 0, 0" LegendStyle="{StaticResource LegendStyle}" > <chartingToolkit:AreaSeries ItemsSource="{Binding}" DependentValuePath="Value" IndependentValuePath="Key" Background="Red" > </chartingToolkit:AreaSeries> <chartingToolkit:Chart.Axes> <chartingToolkit:LinearAxis Orientation="X" ShowGridLines="False" Visibility="Hidden"> </chartingToolkit:LinearAxis> <chartingToolkit:LinearAxis Orientation="Y" ShowGridLines="False" Visibility="Hidden"/> </chartingToolkit:Chart.Axes> </chartingToolkit:Chart> </Grid> The area marked in red arrow must be removed

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• DHTML with Javascript and CSS is not working

  - by Dennis Hodapp

  So for some reason this unobtrusive javascript code is not working and I can't figure out for the life of me why it won't work. I dynamically change the className of a div element and therefore I expect the CSS to reflect that change. However it doesn't. Here's the simplified code. html: <head> <title>Your Page</title> <link rel="stylesheet" type="text/css" href="style.css" /> <script type="text/javascript" src="us.js"></script> </head> <body> <div id="wrapper"> <h1 id="title">Your Page</h1> </div> </body> javascript: window.onload = function() { document.getElementById("wrapper").className = "2"; } css: #wrapper{ background-color: white; } #wrapper.1 { background-color: black; } #wrapper.2 { background-color: red; } #wrapper.3 { background-color: blue; } I look at the wrapper div in firebug and it shows the class being changed to "2". However, the webpage doesn't reflect that by changing the background color to be red. (it doesn't work with changing text color either. I tried that.). I know the CSS is correctly loading. So what is the problem?

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• Background-color puzzle on CSS for heading/title div.

  - by ProfK

  I have the following title div setup, but when only the leftmost div has content, the red background for the title is not applied. Why is this, as the 'title' div has content, and its background should be red. Head stuff: <title>Into the Breech</title> <link href="Styles/Reset.css" rel="stylesheet" type="text/css" /> <style type="text/css"> body { font-family: Arial, Sans-Serif, System; } #title { background-color: #F71831; font-weight: bold; } .title-segment-left { float: left; } </style> Body stuff: <div id="title"> <div id="menu-title" class="title-segment-left" style="width: 200px;"> Menu </div> <div id="main-title" class="title-segment-left" style="width: auto;"> Home Page </div> <div id="right-title" style="float: right;"> Provantage Media Management System </div> </div>

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• Raytraced Shadows Problem

  - by Mat

  Hey There! I've got a problem with shadowrays in my raytracer. Please have a look at the following two pictures 3D sMax: My Raytracer: The scene is lit by a very bright light, shining from the back. It's so bright that there is no gradient in the shading, just either white or dark (due to the overexposure). both images were rendered using 3DStudioMax and both use the exact same geometry, just in one case the normals are interpolated across the triangles. Now consider the red dot on the surface. In the case of the unsmoothed version, it lies in a dark area. this means that the light source is not visible from this triangle, since it's facing away from it. In the smoothed version however, it lies in the lit area, because the interpolated normal would suggest, that the light would be visible at that point (although the actual geometry of the triangle is facing away from the lightsource). My problem now is when raytraced shadows come in. if a shadowray is shot into the scene, from the red dot, to test whether the light-source is visible or not (to determine shadowing), the shadowray will return an intersection, independent of whether normals are interpolated or not (because intersections only depend on the geometry). Therefore the pixel would be shaded dark. 3dsamx is handling the case correctly - the rendered image was generated with Raytraced shadows turned on. However, my own Raytracer runs exactly into this problem when i turn on raytraced shadows (in my raytracer, the point is dark in both cases, because raytraced shadows determine the point lying in the shadow), and i don't know how to solve it. I hope someone knows this problem and how to deal with it.. thanks!

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• REST API Best practice: How to accept as input a list of parameter values

  - by whatupwilly

  Hi All, We are launching a new REST API and I wanted some community input on best practices around how we should have input parameters formatted: Right now, our API is very JSON-centric (only returns JSON). The debate of whether we want/need to return XML is a separate issue. As our API output is JSON centric, we have been going down a path where our inputs are a bit JSON centric and I've been thinking that may be convenient for some but weird in general. For example, to get a few product details where multiple products can be pulled at once we currently have: http://our.api.com/Product?id=["101404","7267261"] Should we simplify this as: http://our.api.com/Product?id=101404,7267261 Or is having JSON input handy? More of a pain? We may want to accept both styles but does that flexibility actually cause more confusion and head aches (maintainability, documentation, etc.)? A more complex case is when we want to offer more complex inputs. For example, if we want to allow multiple filters on search: http://our.api.com/Search?term=pumas&filters={"productType":["Clothing","Bags"],"color":["Black","Red"]} We don't necessarily want to put the filter types (e.g. productType and color) as request names like this: http://our.api.com/Search?term=pumas&productType=["Clothing","Bags"]&color=["Black","Red"] Because we wanted to group all filter input together. In the end, does this really matter? It may be likely that there are so many JSON utils out there that the input type just doesn't matter that much. I know our javascript clients making AJAX calls to the API may appreciate the JSON inputs to make their life easier. Thanks, Will

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• asp.net mvc client side validation; manually calling validation via javascript for ajax posts

  - by Jopache

  Under the built in client side validation (Microsoft mvc validation in mvc 2) using data annotations, when you try to submit a form and the fields are invalid, you will get the red validation summary next to the fields and the form will not post. However, I am using jquery form plugin to intercept the submit action on that form and doing the post via ajax. This is causing it to ignore validation; the red text shows up; but the form posts anyways. Is there an easy way to manually call the validation via javascript when I'm submitting the form? I am still kind of a javascript n00b. I tried googling it with no results and looking through the js source code makes my head hurt trying to figure it out. Or would you all recommend that I look in to some other validation framework? I liked the idea of jquery validate; but would like to define my validation requirements only in my viewmodel. Any experiences with xval or anything of the sort?

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• Using Sendkeys in python to press {F12} results in other keys pressed?

  - by ThantiK

  import time from ctypes import * import win32gui import win32com.client as comclt X = 119 Y = 53 def PILColorToRGB(pil_color): """ convert a PIL-compatible integer into an (r, g, b) tuple """ hexstr = '%06x' % pil_color # reverse byte order r, g, b = hexstr[4:], hexstr[2:4], hexstr[:2] r, g, b = [int(n, 16) for n in (r, g, b)] return (r, g, b) wsh = comclt.Dispatch("WScript.Shell") w = win32gui user = windll.LoadLibrary("c:\\windows\\system32\\user32.dll") h = user.GetDC(0) gdi = windll.LoadLibrary("c:\\windows\\system32\\gdi32.dll") while True: FG = w.GetWindowText(w.GetForegroundWindow()) #FG = Foreground window title. if FG == "World of Warcraft": rgb = (PILColorToRGB(gdi.GetPixel(h,X,Y))) #X, Y time.sleep(0.333) #don't check too often. if (rgb[0] >= 130): #While Pixel (X, Y) is Red... #print "%d %d %d" % (rgb[0], rgb[1], rgb[2]) #Debug wsh.SendKeys("{F12}") #Send a key. time.sleep(0.7) #Add some extra down-time if we send the key. else: time.sleep(5) Basically all this code does is read a pixel on the screen, and send a key (F12) if the pixel is red. But when using this code I regularly get some phantom key-code being pressed. The application I'm using this on is obviously world of warcraft, and I have checked that all keybinds are standard keybinds. However randomly it seems I get either an up arrow, or a w pressed, which moves my character forward whenever this code executes (F12 is bound to a macro, unbound from any movement. If I press f12 with a hardware event, it does not exhibit this behavior. What in the world could be going on here?

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• RegistryKey ValueCount/SubKeyCount wrong

  - by Mark J Miller

  I am trying to query the following registry key values: HKLM\SOFTWARE\Microsoft\MSSQLServer\Client\SharedMemoryOn HKLM\SOFTWARE\Microsoft\MSSQLServer\Client\SuperSocketNetLib\ProtocolOrder But depending on which machine I'm running the program the query returns null. When I debug on my local machine and I inspect the value for ValueCount for: HKLM\SOFTWARE\Microsoft\MSSQLServer\Client HKLM\SOFTWARE\Microsoft\MSSQLServer\Client\SuperSocketNetLib The count is 0 and OpenSubKey returns null. I am a domain admin, in the local administrators group and have added the following to my app.manifest: <requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> Any idea why? private static void ValidateSqlClientSettings() { Console.WriteLine("\r\n/////////////// LOCAL SQL CLIENT PROTOCOLS ////////////////"); RegistryKey keyHKLM = Registry.LocalMachine; ///TODO: nullreferenceexception - connect to remote machine and find out why RegistryKey sqlClientKey = keyHKLM.OpenSubKey(@"SOFTWARE\Microsoft\MSSQLServer\Client"); if (sqlClientKey == null) { WriteLine2Console(@"WARNING: unable to read registry key '{0}\SOFTWARE\Microsoft\MSSQLServer\Client'", ConsoleColor.Yellow); } var cliKeyNames = from k in sqlClientKey.GetSubKeyNames() where k == "SuperSocketNetLib" select k; ///TODO: find out why these values are always missing (even if I can see them in regedit) Console.Write("Shared Memory Disabled (cliconfg): "); if (Convert.ToBoolean(sqlClientKey.GetValue("SharedMemoryOn"))) WriteLine2Console("FAILED", ConsoleColor.Red); else if(sqlClientKey.GetValue("SharedMemoryOn") == null) WriteLine2Console(String.Format("WARNING - unable to read '{0}\\SharedMemoryOn'", sqlClientKey.Name), ConsoleColor.Yellow); else WriteLine2Console("PASS", ConsoleColor.Green); Console.Write("Client Protocol Order (cliconfg - tcp first): "); foreach (string cliKey in cliKeyNames) { RegistryKey subKey = sqlClientKey.OpenSubKey(cliKey); object order = subKey.GetValue("ProtocolOrder"); if (order != null && order.ToString().StartsWith("tcp") == false) { WriteLine2Console("FAILED", ConsoleColor.Red); } else if (order == null) { WriteLine2Console(String.Format("WARNING - unable to read '{0}\\ProtocolOrder'", subKey.Name), ConsoleColor.Yellow); } else { WriteLine2Console("PASS", ConsoleColor.Green); } subKey.Close(); } sqlClientKey.Close(); keyHKLM.Close(); }

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• Data Transfer Objects VS Domain/ActiveRecord Entities in the View in RoR

  - by leypascua

  I'm coming from a .NET background, where it is a practice to not bind domain/entity models directly to the view in not-so-basic CRUD-ish applications where the view does not directly project entity fields as-is. I'm wondering what's the practice in RoR, where the default persistence mechanism is ActiveRecord. I would assert that presentation-related info should not be leaked to the entities, not sure though if this is how real RoR heads would do it. If DTOs/model per view is the approach, how will you do it in Rails? Your thoughts? EDIT: Some examples: - A view shows a list of invoices, with the number of unique items in one column. - A list of credit card accounts, where possibly fraudulent transactions were executed. For that, the UI needs to show this row in red. For both scenarios, The lists don't show all of the fields of the entities, just a few to show in the list (like invoice #, transaction date, name of the account, the amount of the transaction) For the invoice example, The invoice entity doesn't have a field "No. of line items" mapped on it. The database has not been denormalized for perf reasons and it will be computed during query time using aggregate functions. For the credit card accounts example, surely the card transaction entity doesn't have a "Show-in-red" or "IsFraudulent" invariant. Yes it may be a business rule, but for this example, that is a presentation concern, so I would like to keep it out of my domain model.

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• C# Problem with getPixel & setting RTF text colour accordingly

  - by m3n

  Heyo, I'm messing with converting images to ASCII ones. For this I load the image, use getPixel() on each pixel, then change insert a character with that colour into a richTextBox. Bitmap bmBild = new Bitmap(openFileDialog1.FileName.ToString()); // valid image int x = 0, y = 0; for (int i = 0; i <= (bmBild.Width * bmBild.Height - bmBild.Height); i++) { // Ändra text här richTextBox1.Text += "x"; richTextBox1.Select(i, 1); if (bmBild.GetPixel(x, y).IsKnownColor) { richTextBox1.SelectionColor = bmBild.GetPixel(x, y); } else { richTextBox1.SelectionColor = Color.Red; } if (x >= (bmBild.Width -1)) { x = 0; y++; richTextBox1.Text += "\n"; } x++; } GetPixel does return the correct colour, but the text only end up black. If I change this richTextBox1.SelectionColor = bmBild.GetPixel(x, y); to this richTextBox1.SelectionColor = Color.Red; It works fine. Why am I not getting the right colours? (I know it doesn't do the new lines properly, but I thought I'd get to the bottom of this issue first.) Thanks

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• Google Chrome, IE problem with adjusting style before AJAX

  - by orokusaki

  When I'm using AJAX, I typically do something before each request to let the user know that they'll be waiting for a second. This is usually done by just adding an animated loading gif. When I do this, Firefox does what you'd expect and adds the gif before moving control to the next line (where the AJAX is called). In Chrome, it locks the browser and doesn't make any DOM changes at all (let alone load an image), including even changing the color of something, until the AJAX is done. This isn't just AJAX though. It's anything that holds control, and it never makes DOM changes until the control is given back to the window. Example (using jQuery): function submit_order() { $('#my_element').css('color', '#FF0000'); // Make text red before calling AJAX $.getJSON('/api/', my_callback) // Note, in IE and Chrome #my_element isn't turned red until the AJAX finishes and my_callback is run } Why does this happen, and how can I solve it? I can't use ASYNC because of the nature of the data (it would be a big mess). I experimented with using window.setTimeout(myajaxfunc, 150) after setting the style, to see if it would set the style, then do the timeout, but it appears it isn't an issue with just AJAX, but rather the control of the script in general (I think, hence the title making mention to AJAX because this is the only time I ever run into this problem). This doesn't have anything to do with it being in a function BTW.

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• 32 bit depth jpg images problem in IE when referenced locally

  - by Stefan

  We have an webbapplication that takes an image that will be uploaded and resized. The resize-library we used saved all pictures with 32-bit depth whatever the depth was before. We have an online client that can view the pictures via an html-file and all is fine there. All pictures are shown correctly. The problem: We also have an vb-winform application that download the pictures and show them in an html-file locally in an webbrowser control. But here all pictures are rejected (not rendered), just the red cross. If we create an static html-file with img-tags in them locally, its the same. All pictures that has 32-bits depth are shown as red crosses. If we resave the pictures with 24-bits depth it magically works again. So ofcourse that was our "workaround", let the resize-library save all pictures with 24-bits depth instead. Summary: 32-bits jpg files shows correct in IE when online but not when referenced locally in a local html-file. (This is true for IE8 on both winxp and windows7). The same local html-file opened in mozilla showed OK. Question: I have googled this a lot but has not found anything about this "problem". Is this a bug in IE8?

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• How to delete a large cookie that causes Apache to 400

  - by jakemcgraw

  I've come across an issue where a web application has managed to create a cookie on the client, which, when submitted by the client to Apache, causes Apache to return the following: HTTP/1.1 400 Bad Request Date: Mon, 08 Mar 2010 21:21:21 GMT Server: Apache/2.2.3 (Red Hat) Content-Length: 7274 Connection: close Content-Type: text/html; charset=iso-8859-1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>400 Bad Request</title> </head><body> <h1>Bad Request</h1> <p>Your browser sent a request that this server could not understand.<br /> Size of a request header field exceeds server limit.<br /> <pre> Cookie: ::: A REALLY LONG COOKIE ::: </pre> </p> <hr> <address>Apache/2.2.3 (Red Hat) Server at www.foobar.com Port 80</address> </body></html> After looking into the issue, it would appear that the web application has managed to create a really long cookie, over 7000 characters. Now, don't ask me how the web application was able to do this, I was under the impression browsers were supposed to prevent this from happening. I've managed to come up with a solution to prevent the cookies from growing out of control again. The issue I'm trying to tackle is how do I reset the large cookie on the client if every time the client tries to submit a request to Apache, Apache returns a 400 client error? I've tried using the ErrorDocument directive, but it appears that Apache bails on the request before reaching any custom error handling.

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• Firefox drags div like it was an image, javascript event handlers possibly to blame

  - by user281434

  Hi, I'm using this HTML,CSS and Javascript code (in one document together if you want to test it out): <style type="text/css"> #slider_container { width: 200px; height: 30px; background-color: red; display:block; } #slider { width: 20px; height: 30px; background-color: blue; display:block; position:absolute; left:0; } </style> <script type="text/javascript" src="../../js/libs/jquery-1.4.2.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#slider").mousedown(function() { $(document).mousemove(function(evnt) { $("#test").html("sliding"); }).mouseup(function() { $("#test").html("not sliding"); $(document).unbind("mousemove mouseup"); });}); }); </script> <div id="test">a</div> <div id="slider_container"> <div id="slider"></div> </div> Everything (surprisingly) works fine in IE, but firefox seems to totally clusterf*ck when this javascript is used. The first "slide" is okay, you drag, it says "sliding", you drop, it says "not sliding". On the second "slide" (or mousedown if you will), firefox suddenly thinks the div is an image or link and wants to drag it around. Screenshot of the dragging: http://i.imgur.com/nPJxZ.jpg Obviously the blue div half-positioned in the red div is the one being dragged. Windows does not capture the cursor when you take a screenshot, but it's a stop sign. Is there someway to prevent this default behaviour?

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• Get data from database without refresh whole page

  - by stefanz

  Hello everybody. My project is about a school admin I have a page called : createClass.php, where user inserts grade, profile etc. When he press "submit" page called createdClass.php is loading. Inside this page I have all code which insert data into database and also an "if" structure which says : "Class already exists" if in database is another class with same specifications. Also in second page (createdClass.php) i have a small table which shows the place of each student. First time all cells are green (this means that place is free) and if i click one of them appear a popup window which let me to add info about student from that place. If a place is busy the cell will be red (take a look here : http://screencast.com/t/NzM2YzYxNjct). The big problem is that the cell will be red only after refresh the page (the place ask for data from database). If I press refresh appears "class already exists". To test the code i added in a comment all lines which verify and add respectively classroom . I think my problem can be solved with ajax. I'm waiting for an answer. Regards Stefan

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• google static maps via TIdHTTP

  - by cloudstrif3

  Hi all. I'm trying to return content from maps.google.com from within Delphi 2006 using the TIdHTTP component. My code is as follows procedure TForm1.GetGoogleMap(); var t_GetRequest: String; t_Source: TStringList; t_Stream: TMemoryStream; begin t_Source := TStringList.Create; try t_Stream := TMemoryStream.Create; try t_GetRequest := 'http://maps.google.com/maps/api/staticmap?' + 'center=Brooklyn+Bridge,New+York,NY' + '&zoom=14' + '&size=512x512' + '&maptype=roadmap' + '&markers=color:blue|label:S|40.702147,-74.015794' + '&markers=color:green|label:G|40.711614,-74.012318' + '&markers=color:red|color:red|label:C|40.718217,-73.998284' + '&sensor=false'; IdHTTP1.Post(t_GetRequest, t_Source, t_Stream); t_Stream.SaveToFile('google.html'); finally t_Stream.Free; end; finally t_Source.Free; end; end; However I keep getting the response HTTP/1.0 403 Forbidden. I assume this means that I don't have permission to make this request but if I copy the url into my web browser IE 8, it works fine. Is there some header information that I need or something else? thanks you advance.

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• Using multiple aggregate functions in an (ANSI) SQL statement

  - by morpheous

  I have aggregate functions foo(), foobar(), fredstats(), barneystats() I want to create a domain specific query language (DSQL) above my DB, to facilitate using a domain language to query the DB. The 'language' comprises of algebraic expressions (or more specifically SQL like criteria) which I use to generate (ANSI) SQL statements which are sent to the db engine. The following lines are examples of what the language statements will look like, and hopefully, it will help further clarify the concept: **Example 1** DQL statement: foobar('yellow') between 1 and 3 and fredstats('weight') > 42 Translation: fetch all rows in an underlying table where computed values for aggregate function foobar() is between 1 and 3 AND computed value for AGG FUNC fredstats() is greater than 42 **Example 2** DQL statement: fredstats('weight') < barneystats('weight') AND foo('fighter') in (9,10,11) AND foobar('green') <> 42 Translation: Fetch all rows where the specified criteria matches **Example 3** DQL statement: foobar('green') / foobar('red') <> 42 Translation: Fetch all rows where the specified criteria matches **Example 4** DQL statement: foobar('green') - foobar('red') >= 42 Translation: Fetch all rows where the specified criteria matches Given the following information: The table upon which the queries above are being executed is called 'tbl' table 'tbl' has the following structure (id int, name varchar(32), weight float) The result set returns only the tbl.id, tbl.name and the names of the aggregate functions as columns in the result set - so for example the foobar() AGG FUNC column will be called foobar in the result set. So for example, the first DQL query will return a result set with the following columns: id, name, foobar, fredstats Given the above, my questions then are: What would be the underlying SQL required for Example1 ? What would be the underlying SQL required for Example3 ? Given an algebraic equation comprising of AGGREGATE functions, Is there a way of generalizing the algorithm needed to generate the required ANSI SQL statement(s)? I am using PostgreSQL as the db, but I would prefer to use ANSI SQL wherever possible.

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• How can I generate HTML tables in Perl?

  - by anon

  I need to create a 2 tables in HTML format. Each has 5 rows: 1st Table 1st row has FRUITS in it, occupying all columns 2nd row has January(month), occupying all columns 3rd row has names of some 6 fruits (apple, orange, grapes,...)These names do not change. so this row has 6 columns 4th row has rates for each fruit ( 10,20,30..) so this has 6 columns. 5th row has corresponding message for each fruit showing as Available or not. 2nd Table If it is available the background color for the cell should be green and if not RED. 1st row has VEGETABLES in it, occupying all columns 2nd row has February(month), occupying all columns 3rd row has names of some 6 vegetables (tomato, potato..)These names do not change. so this row has 6 columns 4th row has rates for each vegetable ( 10,20,30..) so this has 6 columns. 5th row has corresponding message for each vegetable showing as Available or not.If it is available the background color for the cell should be green and if not RED. All this data is read from a file having a particular format, it is <name of fruit/vegetable price <available or not The names of fruits and vegetable do not change , it will be same for both the tables. However, it might be possible that data for a particular fruit/vegetable is not present. if it is not present the the column for that should show N/A with white background. I cannot use MIME:Lite for this. Need to use print <<ENDHTML;

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