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• How to retrieve the real height of a #div (including overflowed parts)

  - by Toni Michel Caubet

  The same way i use this to detect when user scolled down the whole page: $(window).scroll(function(){ var diff = $(window).scrollTop() + $(window).height() - $(document).height(); if ($(window).scrollTop() == $(document).height() - $(window).height() || (diff < 5 && diff > -5)){ console.log('yay!'); } }); I wanted to do the same inside a dialog, I am trying like this: $('#dialog').dialog(); $('#dialog').scroll(function(){ var scroll = $('#dialog').scrollTop(); var height = $('#dialog ul').outerHeight(true); if(scroll == height){ $('#dialog').css('background','#999'); }else{ console.log('scrolltop is '+scroll+' and height is: '+height); } }) DEMO: http://jsfiddle.net/AgFXz/ The problem i guess is that i am not retrieving the whole #dialog size but the visible (CSS Defined property) size.. How can i know when user scrolled till the end of the dialog's scroll? Thanks!!

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• .NET Micro Edition - Open Multiple Windows

  - by RM

  I've had a look through quite a few tutorials, but cant seem to find how to open multipe windows? I'm not expecting to have them layer etc, I just want to define multiple window classes and say, from a menu, launch the appropriate window class from the menu window. Then when that window is finished, call the close method on it and menu will show again. I have managed to do the same kind of functionality using panels, but think window is really what I should be using? (.NET MF 4.0) I assume you can do this? I think im missing something obvious?

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• jquery, simplemodal with a tooltip?

  - by matthewsteiner

  I'm using http://dev.mariusilie.net/content/simple-tooltip-jquery-plugin for my tooltip and simple modal for a modal window. I've got a link in the modal window and when I put my mouse over it, the tooltip is there, but it's beneath the modal window. I think it has to do with "z-index". I looked and I think the modal window is at 1000. I've set the #simpleTooltip property in the css with various z-index values, with no luck. It always appears beneath the modal window. Any Ideas?

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• Restricting numeric input javascript problem

  - by neitony

  I'm trying to figure out why my javascript code is not restricting numeric input. Here's the code below: (function(){ if(window.addEventListener) window.addEventListener("load",init,false); else if(window.attachEvent) window.attachEvent("onload",init); function init() { var keytest = document.getElementById("keytest"); function numericinput(event) { var e = event || window.event; var key = e.charcode || e.keyCode; var regex =/^\d+\.?\d{4}$/; key = String.fromCharCode(key); if (!regex.test(key)) { alert("something"); //if(e.preventDefault) e.preventDefault(); //if(e.returnValue) e.returnValue = false; //return false; } else { //return true; alert("something else"); } } if(keytest.addEventListener) keytest.addEventListener("keypress",numericinput,false); else { keytest.onkeypress = numericinput(); } } })();

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• Drupal removing javascript from Full HTML link

  - by Jen

  I am new to Drupal and am trying to create a node (let's call it child) that will only really be accessed when clicked on from another node (we'll call it parent). When closing the child window, I want to parent window to refresh. Outside of Drupal, that's easy: <a onclick="window.close(); window.opener.location.reload();" href="#">Click to close this window</a> However, when I type this into the body of a node using Full HTML, it still strips the onclick text from my post. How can I include javascript in the body of a node like this? Is there a special module I need. Thanks!

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• How do I programmatically add a widget to a container created from GtkBuilder?

  - by Warner Young

  I've created a window that has some containers and widgets in it, and I want to add a new widget dynamically at run-time to one of the Vboxes in this window. So I have this code, which brings up the window: gtk_builder_add_from_file( g_builder, "window.xml", NULL ); mainwindow = GTK_WIDGET( gtk_builder_get_object( g_builder, "window" )); gtk_widget_show( mainwindow ); Then I create a new label, for example, and add it to one of the existing Vboxes, called "vbox_mid", like this: label = gtk_label_new( "Test label" ); vbox = GTK_WIDGET( gtk_builder_get_object( g_builder, "vbox_mid" )); gtk_box_pack_end( GTK_BOX( vbox ), label, TRUE, TRUE, 0 ); But this doesn't seem to work. I don't see a new label in the vbox. I have a feeling I'm missing something here, but I can't see what it is. I thought perhaps there was a special GtkBuilder call to add a widget dynamically, but I don't see anything that looks like that. I would really appreciate any help on this.

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• SetWindowLongPtr with DialogBoxParam?

  - by templatetypedef

  Hey all- A while back I was writing a C++ program with the Win32 API that would display a dialog box and then listen to the messages it generated. At one point, I was interested in associating a piece of data with the dialog window. Were I manually creating the window and attaching a window proc, I'd just use SetWindowLongPtr to set the GWLP_USERDATA field to a pointer to the data to associate. However, in this case I was creating and displaying the window with DialogBoxParam, and it wasn't clear whether this function was associating that data with its own internal state. Since the MSDN didn't have a description of what would happen in this case, I ended up using some other approach to solve the problem. My question is this - is it safe to use SetWindowLongPtr to overwrite the GWLP_USERDATA value in a window created by DialogBoxParam? Thanks!

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• Java swing center JDialog over parent

  - by Chris Drappier

  I have a Java swing application with a button that produces a popup window when a certain action is performed. I'd like to align the center point of the popup window with the center point of the parent window when it is rendered. How can I calculate the x,y coordinates to plug into setLocation() for the popup window? EDIT: just to clarify. I do not want the behavior of setLocationRelativeTo() because that sets the top-left pixel of the popup over the center pixel of the parent frame. I want to set the center pixel of the popup over the center pixel of the parent frame. Also, I'm not interested in whether or not a popup window is good practice. I'm past that now. thanks

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• Check if class has been instantiated

  - by Holman716

  In my current program I have a main window and a secondary window that pops up when a button is pressed. If the secondary window is currently shown but doesn't have focus the button will instead bring it to focus. At this time I am creating a new instance of the secondary window as the main window loads and simply checking its status with SubWindow.IsDisposed and SubWindow.CanFocus I have found that if I do not create a new instance at the beginning SubWindow.IsDisposed throws an exception. As long as I'd previously created an instance of SubWindow the check runs fine. My question- The current version works fine but is there a better way of doing this? It is not a huge concern, but it feels like it'd be better to be able to check for existence without having to guarantee that it has existed at least once before.

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• Set the Windows Explorer Startup Folder in Windows 7

  - by Mysticgeek

  When you open Windows Explorer from the Taskbar in Windows 7, it defaults to the Libraries view. Today we take a look at changing the target path to allow you to customize which location opens by default. When you click on the Windows Explorer icon on the Windows 7 Taskbar, it’s set to open to the Libraries view by default. You might not use the Libraries feature, or want to set it to a different location that is more commonly used. Set Windows Explorer Startup Location To change the default startup location for the Windows Explorer Taskbar icon, if you have no Explorer screens open, hold down the Shift key, right-click the Explorer icon, and select Properties. Or if you have Windows open, right-click on the Explorer icon to bring up the Jumplist, then right-click on Windows Explorer and select Properties. Windows Explorer Properties opens up and you’ll want to click on the Shortcut tab so we can change the Target.   A common place you might want it to default to is your Documents folder. So to do that we need to enter the following into the Target field. %SystemRoot%\explorer.exe /n,::{450D8FBA-AD25-11D0-98A8-0800361B1103}   Now when you open Windows Explorer from the Taskbar it defaults to My Documents… If you use the Start Menu to access Windows Explorer, open the Start Menu and go to All Programs \ Accessories and right-click on Windows Explorer then select Properties. Change the target path to where you want it to go. In this example we want Windows Explorer to open up to My Computer so we entered the following in the Target field. %SystemRoot%\explorer.exe /E,::{20D04FE0-3AEA-1069-A2D8-08002B30309D} When click on the Explorer icon in the Start Menu it defaults to My Computer… You can set it to open to various locations. For instance if you wanted to mess with someone at work, you could enter the following and Explorer will always open to the Recycle Bin. %SystemRoot%\explorer.exe /E,::{645FF040-5081-101B-9F08-00AA002F954E} Conclusion Here we showed you a couple of commonly used locations that you might want Windows Explorer to open to instead of Libraries. You can set it to other locations if you know the GUID (Globally Unique Identifiers) for the object or location you want it to default to. For more on using GUIDs check out The Geek’s article on how to enable the secret “How-To Geek” mode in Windows 7. Actually it’s just a play on the so-called “God Mode” for Windows, but there is some good information, and a list of some locations you might want to have Windows Explorer open to. Similar Articles Productive Geek Tips Make Explorer Show Window Titles in Windows VistaDisable Explorer Breadcrumbs in Windows VistaStill Useful in Vista: Startup Control PanelStop an Application from Running at Startup in Windows VistaHotkey for Creating New Folder in Windows Explorer TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips VMware Workstation 7 Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Twelve must-have Google Chrome plugins Cool Looking Skins for Windows Media Player 12 Move the Mouse Pointer With Your Face Movement Using eViacam Boot Windows Faster With Boot Performance Diagnostics Create Ringtones For Your Android Phone With RingDroid Enhance Your Laptop’s Battery Life With These Tips

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• File Access problems with SLES 10 SP2 OES2 SP1

  - by Blackhawk131

  We have identified a couple of repeatable, demonstrable scenarios with unexplained rejected folder access on our servers for Mac users. Hopefully, this can be presented to Novell for a solution. What we did to demonstrate scenario 1; 1. setup a PC and Mac side-by-side 2. login to our server and open up to a central location on both Mac and PC 3. on the PC in that central location create a folder 4. on the Mac in that central location drag the created folder to the Mac desktop, this should work fine, no problem 5. on the PC rename that folder 6. on the Mac drag a file to that renamed folder, this should error with the following message; a. You cannot copy some of these items to the destination because their names are too long for the destination. Do you want to skip copying these items and continue copying the other items? b. Select skip, response is the filename is copied to the location with zero or small byte size. Try opening it and you get file is corrupted error message. What we did to demonstrate scenario 2; 1. setup a PC and Mac side-by-side 2. login to our server and open up to a central location on both Mac and PC 3. on the PC in that central location create a folder then create a subfolder 4. copy some content into the subfolder 5. on the Mac in that central location drag the created top level folder to the Mac desktop, this should work fine, no problem 6. on the PC rename that subfolder 7. on the Mac drag that top level folder to the Mac desktop, this should error on the Mac with the following; a. The operation cannot be completed because you do not have sufficient privileges for b. The operation cannot be completed because you do not have sufficient privileges for 8. on the Mac, if you open that subfolder you can see the file copied in step 4 above but, you can not open that file, you get the following message if you try; a. There was an error opening this document. You do not have permission to open this file. 9. on the PC drag some content into the top level folder 10. on the Mac you can open that file directly from the server or copy it locally, no problem, however-the subfolder is still corrupted or locked, whichever 11. on the PC rename the top level folder 12. on the Mac that same file just opened in step 10 above is now not accessible, get the following message; a. The document could not be opened. I have observed some variances in the above. For instance, a change on the PC side may take a moment before you can observer or act on the Mac side - kind of like the server is slow to respond. Also, the error message may vary. However, the key is once a folder, or subfolder, gets renamed by a PC, Mac problems commence. The solution is to create a new folder from a PC and copy the contents of the corrupted folder to the new folder and not rename the folder name. This has to be done on a PC because the corrupted folder is not accessible by a Mac user. Another problem that dovetails with the above is that we know certain characters are not allowed for PC folder or filenames. If a Mac user creates a folder with a slash in the file name, from the PC the user does not see that slash in the name. As soon as the PC user copies a file to that folder, the Mac user is locked from that folder. Will get the following error message; - Sorry, the operation could not be completed because an unexpected error occurred. - (Error code - 50) In addition to the above mentioned character issue with folders, the problem is more evil with filenames. If, for example, you create a file with a slash in the filename on a Mac and copy it to the server you will get the following error message; - You cannot copy some of these items to the destination because their names are too long for the destination. Do you want to skip copying these items and continue copying the other items? Select either Stop or Skip buttons. It does not matter which button is selected. The file name gets copied to the destination location at a reduced size. Depending on the file type, the icon associated with the file may or may not be present. Furthermore, if you open that file on the server you will get the following message; - Couldnt open the file. It may be corrupt or a file format that doesnt recognize. From the users perspective, if they are not observant of the icon or file size, they may disregard the error message and think their file has copied as intended. Only later do they discover the file is corrupt if they open that file. I want to make a note on this problem. It is the PC causing the issue. You can change folder and file names all day on a MAC and you don't have a problem as long as a character is not the issue. Once you change the file name or folder name from a PC the entire folder structure from that level down is corrupted. But it has to be resolved from a PC by creating a new folder and copying the contents to the new folder like stated above. Is something not configured correctly? SUSE Linux Enterprise Server 10 (x86_64) VERSION = 10 PATCHLEVEL = 2 LSB_VERSION="core-2.0-noarch:core-3.0-noarch:core-2.0-x86_64:core-3.0-x86_64" Novell Open Enterprise Server 2.0.1 (x86_64) VERSION = 2.0.1 PATCHLEVEL = 1 BUILD Note: We use Novell clients on all windows systems to connect to the servers for file access and network storage. We use AFP to allow OSx systems to connect to servers.

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• Today at Oracle OpenWorld 2012

  - by Scott McNeil

  We have another full day of great Oracle OpenWorld keynotes, sessions, demos and customer presentations in the Seen and Be Heard threater. Here's a quick run down of what's happening today with Oracle Enterprise Manager 12c: Download the Oracle Enterprise Manager 12c OpenWorld schedule (PDF) Oracle Enterprise Manager Cloud Control 12c (and Private Cloud) General Session Tues 2 Oct, 2012 Time Title Location 11:45 AM - 12:45 PM General Session: Using Oracle Enterprise Manager to Manage Your Own Private Cloud Moscone South - 103* 1:15 PM - 2:15 PM General Session: Breakthrough Efficiency in Private Cloud Infrastructure Moscone West - 3014 Conference Session Tues 2 Oct, 2012 Time Title Location 10:15 AM - 11:15 AM Oracle Exadata/Oracle Enterprise Manager 12c: Journey into Oracle Database Cloud Moscone West - 3018 10:15 AM - 11:15 AM Bulletproof Your Application Upgrades with Secure Data Masking and Subsetting Moscone West - 3020 10:15 AM - 11:15 AM Oracle Enterprise Manager 12c: Architecture Deep Dive, Tips, and Techniques Moscone South - 303 11:45 AM - 12:45 PM RDBMS Forensics: Troubleshooting with Active Session History Moscone West - 3018 11:45 AM - 12:45 PM Building and Operationalizing Your Data Center Environment with Oracle Exalogic Moscone South - 309 11:45 AM - 12:45 PM Securely Building a National Electronic Health Record: Singapore Case Study Westin San Francisco - Concordia 1:15 PM - 2:15 PM Managing Heterogeneous Environments with Oracle Enterprise Manager Moscone West - 3018 1:15 PM - 2:15 PM Complete Oracle WebLogic Server Management with Oracle Enterprise Manager 12c Moscone South - 309 1:15 PM - 2:15 PM Database Lifecycle Management with Oracle Enterprise Manager 12c Moscone West - 3020 1:15 PM - 2:15 PM Best Practices, Key Features, Tips, Techniques for Oracle Enterprise Manager 12c Upgrade Moscone South - 307 1:15 PM - 2:15 PM Enterprise Cloud with CSC’s Foundation Services for Oracle and Oracle Enterprise Manager 12c Moscone South - 236 5:00 PM - 6:00 PM Deep Dive 3-D on Oracle Exadata Management: From Discovery to Deployment to Diagnostics Moscone West - 3018 5:00 PM - 6:00 PM Everything You Need to Know About Monitoring and Troubleshooting Oracle GoldenGate Moscone West - 3005 5:00 PM - 6:00 PM Oracle Enterprise Manager 12c: The Nerve Center of Oracle Cloud Moscone West - 3020 5:00 PM - 6:00 PM Advanced Management of Oracle E-Business Suite with Oracle Enterprise Manager Moscone West - 2016 5:00 PM - 6:00 PM Oracle Enterprise Manager 12c Cloud Control Performance Pages: Falling in Love Again Moscone West - 3014 Hands-on Labs Tues 2 Oct, 2012 Time Title Location 10:15 AM - 12:45 PM Managing the Cloud with Oracle Enterprise Manager 12c Marriott Marquis - Salon 5/6 1:15 PM - 2:15 PM Database Performance Tuning Hands-on Lab Marriott Marquis - Salon 5/6 Scene and Be Heard Theater Session Tues 2 Oct, 2012 Time Title Location 10:30 AM - 10:50 AM Start Small, Grow Big: Hands-On Oracle Private Cloud—A Step-by-Step Guide Moscone South Exhibition Hall - Booth 2407 12:30 PM - 12:50 PM Blue Medora’s Oracle Enterprise Manager Plug-in for VMware vSphere Monitoring Moscone South Exhibition Hall - Booth 2407 Demos Demo Location Application and Infrastructure Testing Moscone West - W-092 Automatic Application and SQL Tuning Moscone South, Left - S-042 Automatic Fault Diagnostics Moscone South, Left - S-036 Automatic Performance Diagnostics Moscone South, Left - S-033 Complete Care for Oracle Using My Oracle Support Moscone South, Left - S-031 Complete Cloud Lifecycle Management Moscone North, Upper Lobby - N-019 Complete Database Lifecycle Management Moscone South, Left - S-030 Comprehensive Infrastructure as a Service via Oracle Enterprise Manager Moscone South, Left - S-045 Data Masking and Data Subsetting Moscone South, Left - S-034 Database Testing with Oracle Real Application Testing Moscone South, Left - S-041 Identity Management Monitoring with Oracle Enterprise Manager Moscone South, Right - S-212 Mission-Critical, SPARC-Powered Infrastructure as a Service Moscone South, Center - S-157 Oracle E-Business Suite, Siebel, JD Edwards, and PeopleSoft Management Moscone West - W-084 Oracle Enterprise Manager Cloud Control 12c Overview Moscone South, Left - S-039 Oracle Enterprise Manager: Complete Data Center Management Moscone South, Left - S-040 Oracle Exadata Management Moscone South, Center - Oracle Exalogic Management Moscone South, Center - Oracle Fusion Applications Management Moscone West - W-018 Oracle Real User Experience Insight Moscone South, Right - S-226 Oracle WebLogic Server Management and Java Diagnostics Moscone South, Right - S-206 Platform as a Service Using Oracle Enterprise Manager Moscone North, Upper Lobby - N-020 SOA Management Moscone South, Right - S-225 Self-Service Application Testing on Private and Public Clouds Moscone West - W-110 Oracle OpenWorld Music Festival New this year is Oracle’s first annual Oracle OpenWorld Musical Festival, featuring some of today's breakthrough musicians from around the country and the world. It's five nights of back-to-back performances in the heart of San Francisco—free to registered attendees. See the lineup Not Heading to OpenWorld—Watch it Live! Stay Connected: Twitter | Facebook | YouTube | Linkedin | Newsletter Download the Oracle Enterprise Manager Cloud Control12c Mobile app

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• In GLSL is it possible to offset vertices based on height map colour?

  - by Rob

  I am attempting to generate some terrain based upon a heightmap. I have generated a 32 x 32 grid and a corresponding height map - In my vertex shader I am trying to offset the position of the Y axis based upon the colour of the heightmap, white vertices being higher than black ones. //Vertex Shader Code #version 330 uniform mat4 modelMatrix; uniform mat4 viewMatrix; uniform mat4 projectionMatrix; uniform sampler2D heightmap; layout (location=0) in vec4 vertexPos; layout (location=1) in vec4 vertexColour; layout (location=3) in vec2 vertexTextureCoord; layout (location=4) in float offset; out vec4 fragCol; out vec4 fragPos; out vec2 fragTex; void main() { // Retreive the current pixel's colour vec4 hmColour = texture(heightmap,vertexTextureCoord); // Offset the y position by the value of current texel's colour value ? vec4 offset = vec4(vertexPos.x , vertexPos.y + hmColour.r, vertexPos.z , 1.0); // Final Position gl_Position = projectionMatrix * viewMatrix * modelMatrix * offset; // Data sent to Fragment Shader. fragCol = vertexColour; fragPos = vertexPos; fragTex = vertexTextureCoord; } However the code I have produced only creates a grid with none of the y vertices higher than any others. This is the C++ code that generates the grid and texture co-orientates which I believe to be correct as the texture is mapped to the grid, hence the white blob in the middle. The grid-lines are generated in the fragment shader, sorry for any confusion. I have tried multiplying the r value of hmColour by 1000 unfortunately that had no effect. The only other problem it could be is that the texture coordinate data is incorrect ? for (int z = 0; z < MAP_Z ; z++) { for(int x = 0; x < MAP_X ; x++) { //Generate Vertex Buffer vertexData[iVertex++] = float (x) * MAP_X; vertexData[iVertex++] = 0; vertexData[iVertex++] = -(float) (z) * MAP_Z; //Colour Buffer NOT NEEDED colourData[iColour++] = 255.0f; // R colourData[iColour++] = 1.0f; // G colourData[iColour++] = 0.0f; // B //Texture Buffer textureData[iTexture++] = (float ) x * (1.0f / MAP_X); textureData[iTexture++] = (float ) z * (1.0f / MAP_Z); } } The heightmap texture I am trying to use appears like so (without grid-lines). This is the corresponding fragment shader // Fragment Shader Code #version 330 uniform sampler2D hmTexture; layout (location=0) out vec4 fragColour; in vec2 fragTex; in vec4 pos; void main(void) { vec2 line = fragTex * 32; // Without Gridlines fragColour = texture(hmTexture,fragTex); // With grid lines // + mix(vec4(0.0, 0.0, 1.0, 0.0), vec4(1.0, 1.0, 1.0, 1.0), // smoothstep(0.05,fract(line.y), 0.99) * smoothstep(0.05,fract(line.x),0.99)); }

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• GLSL Shader Texture Performance

  - by Austin

  I currently have a project that renders OpenGL video using a vertex and fragment shader. The shaders work fine as-is, but in trying to add in texturing, I am running into performance issues and can't figure out why. Before adding texturing, my program ran just fine and loaded my CPU between 0%-4%. When adding texturing (specifically textures AND color -- noted by comment below), my CPU is 100% loaded. The only code I have added is the relevant texturing code to the shader, and the "glBindTexture()" calls to the rendering code. Here are my shaders and relevant rending code. Vertex Shader: #version 150 uniform mat4 mvMatrix; uniform mat4 mvpMatrix; uniform mat3 normalMatrix; uniform vec4 lightPosition; uniform float diffuseValue; layout(location = 0) in vec3 vertex; layout(location = 1) in vec3 color; layout(location = 2) in vec3 normal; layout(location = 3) in vec2 texCoord; smooth out VertData { vec3 color; vec3 normal; vec3 toLight; float diffuseValue; vec2 texCoord; } VertOut; void main(void) { gl_Position = mvpMatrix * vec4(vertex, 1.0); VertOut.normal = normalize(normalMatrix * normal); VertOut.toLight = normalize(vec3(mvMatrix * lightPosition - gl_Position)); VertOut.color = color; VertOut.diffuseValue = diffuseValue; VertOut.texCoord = texCoord; } Fragment Shader: #version 150 smooth in VertData { vec3 color; vec3 normal; vec3 toLight; float diffuseValue; vec2 texCoord; } VertIn; uniform sampler2D tex; layout(location = 0) out vec3 colorOut; void main(void) { float diffuseComp = max( dot(normalize(VertIn.normal), normalize(VertIn.toLight)) ), 0.0); vec4 color = texture2D(tex, VertIn.texCoord); colorOut = color.rgb * diffuseComp * VertIn.diffuseValue + color.rgb * (1 - VertIn.diffuseValue); // FOLLOWING LINE CAUSES PERFORMANCE ISSUES colorOut *= VertIn.color; } Relevant Rendering Code: // 3 textures have been successfully pre-loaded, and can be used // texture[0] is a 1x1 white texture to effectively turn off texturing glUseProgram(program); // Draw squares glBindTexture(GL_TEXTURE_2D, texture[1]); // Set attributes, uniforms, etc glDrawArrays(GL_QUADS, 0, 6*4); // Draw triangles glBindTexture(GL_TEXTURE_2D, texture[0]); // Set attributes, uniforms, etc glDrawArrays(GL_TRIANGLES, 0, 3*4); // Draw reference planes glBindTexture(GL_TEXTURE_2D, texture[0]); // Set attributes, uniforms, etc glDrawArrays(GL_LINES, 0, 4*81*2); // Draw terrain glBindTexture(GL_TEXTURE_2D, texture[2]); // Set attributes, uniforms, etc glDrawArrays(GL_TRIANGLES, 0, 501*501*6); // Release glBindTexture(GL_TEXTURE_2D, 0); glUseProgram(0); Any help is greatly appreciated!

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• File Access problems with SLES 10 SP2 OES2 SP1

  - by Blackhawk131

  We have identified a couple of repeatable, demonstrable scenarios with unexplained rejected folder access on our servers for Mac users. Hopefully, this can be presented to Novell for a solution. What we did to demonstrate scenario 1; 1. setup a PC and Mac side-by-side 2. login to our server and open up to a central location on both Mac and PC 3. on the PC in that central location create a folder 4. on the Mac in that central location drag the created folder to the Mac desktop, this should work fine, no problem 5. on the PC rename that folder 6. on the Mac drag a file to that renamed folder, this should error with the following message; a. You cannot copy some of these items to the destination because their names are too long for the destination. Do you want to skip copying these items and continue copying the other items? b. Select skip, response is the filename is copied to the location with zero or small byte size. Try opening it and you get file is corrupted error message. What we did to demonstrate scenario 2; 1. setup a PC and Mac side-by-side 2. login to our server and open up to a central location on both Mac and PC 3. on the PC in that central location create a folder then create a subfolder 4. copy some content into the subfolder 5. on the Mac in that central location drag the created top level folder to the Mac desktop, this should work fine, no problem 6. on the PC rename that subfolder 7. on the Mac drag that top level folder to the Mac desktop, this should error on the Mac with the following; a. The operation cannot be completed because you do not have sufficient privileges for b. The operation cannot be completed because you do not have sufficient privileges for 8. on the Mac, if you open that subfolder you can see the file copied in step 4 above but, you can not open that file, you get the following message if you try; a. There was an error opening this document. You do not have permission to open this file. 9. on the PC drag some content into the top level folder 10. on the Mac you can open that file directly from the server or copy it locally, no problem, however-the subfolder is still corrupted or locked, whichever 11. on the PC rename the top level folder 12. on the Mac that same file just opened in step 10 above is now not accessible, get the following message; a. The document could not be opened. I have observed some variances in the above. For instance, a change on the PC side may take a moment before you can observer or act on the Mac side - kind of like the server is slow to respond. Also, the error message may vary. However, the key is once a folder, or subfolder, gets renamed by a PC, Mac problems commence. The solution is to create a new folder from a PC and copy the contents of the corrupted folder to the new folder and not rename the folder name. This has to be done on a PC because the corrupted folder is not accessible by a Mac user. Another problem that dovetails with the above is that we know certain characters are not allowed for PC folder or filenames. If a Mac user creates a folder with a slash in the file name, from the PC the user does not see that slash in the name. As soon as the PC user copies a file to that folder, the Mac user is locked from that folder. Will get the following error message; - Sorry, the operation could not be completed because an unexpected error occurred. - (Error code - 50) In addition to the above mentioned character issue with folders, the problem is more evil with filenames. If, for example, you create a file with a slash in the filename on a Mac and copy it to the server you will get the following error message; - You cannot copy some of these items to the destination because their names are too long for the destination. Do you want to skip copying these items and continue copying the other items? Select either Stop or Skip buttons. It does not matter which button is selected. The file name gets copied to the destination location at a reduced size. Depending on the file type, the icon associated with the file may or may not be present. Furthermore, if you open that file on the server you will get the following message; - Couldnt open the file. It may be corrupt or a file format that doesnt recognize. From the users perspective, if they are not observant of the icon or file size, they may disregard the error message and think their file has copied as intended. Only later do they discover the file is corrupt if they open that file. I want to make a note on this problem. It is the PC causing the issue. You can change folder and file names all day on a MAC and you don't have a problem as long as a character is not the issue. Once you change the file name or folder name from a PC the entire folder structure from that level down is corrupted. But it has to be resolved from a PC by creating a new folder and copying the contents to the new folder like stated above. Is something not configured correctly? SUSE Linux Enterprise Server 10 (x86_64) VERSION = 10 PATCHLEVEL = 2 LSB_VERSION="core-2.0-noarch:core-3.0-noarch:core-2.0-x86_64:core-3.0-x86_64" Novell Open Enterprise Server 2.0.1 (x86_64) VERSION = 2.0.1 PATCHLEVEL = 1 BUILD Note: We use Novell clients on all windows systems to connect to the servers for file access and network storage. We use AFP to allow OSx systems to connect to servers.

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• Dual monitor not working completely in 12.10 after upgrade

  - by Mark Baldridge

  At 12.04, dual monitors worked perfectly. After upgrading to 12.10, the primary monitor works, the second monitor only partly works. I am sure there is some difference between the releases that I have missed setting properly. System settings - Displays show both correctly as Acer 22" monitors at 1680x1050 (16:10). An icon on monitor 2 is present, but elongated; almost an artifact, since other icons on the primary screen are absent, but this one icon is there on th second monitor. Selecting the icons on both screens exist. Painting is weird on monitor 2. Launcher exists and works on both screens, but even with sticky edges off, the cursor stops at the left edge of monitor 2. Clicking on text editor on screen 2 launcer will launch gedit there. If I drag it, it leaves a trail of after images like repaint is failing. If I drive the cursor on the launcher, the help tags like "LibreOffice Writer" appear, but stay on screen unless I drag the active gedit window over them. Then part of the help bubbles are overwritten, leaving behind after images of the gedit window on screen. What is really fascinating is that the System settings - Displays is now ignoring monitor selection, after allowing it earlier. Just before this, the help popup which said "Select a monitor to change its properties; drag to rearrange its placement" actually let me do that. Maybe a trick of where I grab the edge of the monitor in the Displays setting. I just found a working handle. When I drag monitor 1 to the right of monitor 2, "Apply" and confirm, both monitors work normally (although the right monitor lets the cursor slide off the right edge onto the left edge of monitor 1 - which sounds correct). Painting of windows does not leave an after image. However, success is only temporary. The setting survives the reboot, but painting on the left monitor, now monitor 2, now replicates the issues from before. The after image of the gedit window and the small window for "Are you sure you want to close all programs and restart the computer?" are still on monitor 2 (on the left now), even though they are not real windows, nor do they have processes behind them. Curiously, in Displays, the "green" monitor on the left in the display window is matched by the right monitor color in the monitor upper left corner. Probably makes sense as the one on the right is now monitor 1. If I repeat the "drag the left monitor to the right of the right monitor on the "Displays" window, things are oriented properly, with no display artifacts as I drag windows around either screen. Also the description bubbles that pop up are overwritten on both screens, so none of those artifacts either. This goodness does not survive a reboot, however. Have not tried logging out and back in. All of this after positing that the motherboard VGA and HDMI ports could have been the issue. So, I installed an e-GeForce 7600 GT Dual DVI (I know the web thinks it is not DVI, but VGA, but the connectors are DVI). No change to the weird behavior. The good parts continue to work, the weirdness also works, and swapping monitor positions seems to cure the issue. So, is there a setting I have missed? Given "swapping" monitor 1 and 2 on the System Settings... - Displays makes it work, just not across boot, I suspect so.

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• Selenium &ndash; Use Data Driven tests to run in multiple browsers and sizes

  - by Aligned

  Originally posted on: http://geekswithblogs.net/Aligned/archive/2013/11/04/selenium-ndash-use-data-driven-tests-to-run-in-multiple.aspxSelenium uses WebDriver (or is it the same? I’m still learning how it is connected) to run Automated UI tests in many different browsers. For example, you can run the same test in Chrome and Firefox and in a smaller sized Chrome browser. The permutations can grow quickly. One way to get them to run in MStest is to create  a test method for each test (ie ChromeDeleteItem_Small, ChromeDeleteItem_Large, FFDeleteItem_Small, FFDeleteItem_Large) that each call  the same base method, passing in the browser and size you’d like. This approach was causing a lot of duplicate code, so I decided to use the data driven approach, common to Coded UI or Unit test methods. 1. Create a class with a test method. 2. Create a csv with two columns: BrowserType, BrowserSize 3. Add rows for each permutation: Chrome, Large | Chrome, Small | Firefox, Large | Firefox, Small | IE, Large | IE, Small | *** 4. Add the csv to the Visual Studio Project. 5. Set the Copy to output directory to Copy always 6. Add the attribute: [DataSource("Microsoft.VisualStudio.TestTools.DataSource.CSV", "|DataDirectory|\\TestMatrix.csv", "TestMatrix#csv", DataAccessMethod.Sequential), DeploymentItem("TestMatrix.csv")] 7. Run the test in the test explorer Example:[CodedUITest] public class AllTasksTests : TasksTestBase { [TestMethod] [TestCategory("Tasks")] [DataSource("Microsoft.VisualStudio.TestTools.DataSource.CSV", "|DataDirectory|\\TestMatrix.csv", "TestMatrix#csv", DataAccessMethod.Sequential), DeploymentItem("TestMatrix.csv")] public void CreateTask() { this.PrepForDataDrivenTest(); base.CreateTaskTest("New Task"); } } protected void PrepForDataDrivenTest() { var browserType = this.ParseBrowserType(Context.DataRow["BrowserType"].ToString()); var browserSize = this.ParseBrowserSize(Context.DataRow["BrowserSize"].ToString()); this.BrowserType = browserType; this.BrowserSize = browserSize; Trace.WriteLine("browser: " + browserType.ToString()); Trace.WriteLine("browser size: " + browserSize.ToString()); } /// <summary> /// Get the enum value from the string /// </summary> /// <param name="browserType">Chrome, Firefox, or IE</param> /// <returns>The browser type.</returns> private BrowserType ParseBrowserType(string browserType) { return (UITestFramework.BrowserType)Enum.Parse(typeof(UITestFramework.BrowserType), browserType, true); } /// <summary> /// Get the browser size enum value from the string /// </summary> /// <param name="browserSize">Small, Medium, Large</param> /// <returns>the browser size</returns> private BrowserSizeEnum ParseBrowserSize(string browserSize) { return (BrowserSizeEnum)Enum.Parse(typeof(BrowserSizeEnum), browserSize, true); }/// <summary> /// Change the browser to the size based on the enum. /// </summary> /// <param name="browserSize">The BrowserSizeEnum value to resize the window to.</param> private void ResizeBrowser(BrowserSizeEnum browserSize) { switch (browserSize) { case BrowserSizeEnum.Large: this.driver.Manage().Window.Maximize(); break; case BrowserSizeEnum.Medium: this.driver.Manage().Window.Size = new Size(800, this.driver.Manage().Window.Size.Height); break; case BrowserSizeEnum.Small: this.driver.Manage().Window.Size = new Size(500, this.driver.Manage().Window.Size.Height); break; default: break; } }/// <summary> /// Browser sizes for automation testing /// </summary> public enum BrowserSizeEnum { /// <summary> /// Large size, Maximized to the desktop /// </summary> Large, /// <summary> /// Similar to tablets /// </summary> Medium, /// <summary> /// Phone sizes... 610px and smaller /// </summary> Small } Hope it helps!

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• Run custom javascript when page loads

  - by Husain Dalal

  Ran into a neat way to load and run custom javascript when an ADF page loads:         <af:resource type="javascript">         function onLoad() {       alert("I am running ! ");           }           //Script block           if (window.addEventListener) {             window.addEventListener("load", onLoad, false)           } else if (window.attachEvent) {              window.detachEvent("onload", onLoad)              window.attachEvent("onload", onLoad)           } else {             window.onload=onLoad           }         </af:resource>  Reference: http://docs.oracle.com/cd/E23943_01/webcenter.1111/e10148/jpsdg_pagelet.htm#BABGHCBF 

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• Silverlight - Adding Text to Pushpin in Bing Maps via C#

  - by Morano88

  I was able to make my silverlight Bing map accepts Mousclicks and converts them to Pushpins in C#. Now I want to show a text next to the PushPin as a description that appears when the mouse goes over the pin , I have no clue how to do that. What are the methods that enable me to do this thing? This is the C# code : public partial class MainPage : UserControl { private MapLayer m_PushpinLayer; public MainPage() { InitializeComponent(); base.Loaded += OnLoaded; } private void OnLoaded(object sender, RoutedEventArgs e) { base.Loaded -= OnLoaded; m_PushpinLayer = new MapLayer(); x_Map.Children.Add(m_PushpinLayer); x_Map.MouseClick += OnMouseClick; } private void AddPushpin(double latitude, double longitude) { Pushpin pushpin = new Pushpin(); pushpin.MouseEnter += OnMouseEnter; pushpin.MouseLeave += OnMouseLeave; m_PushpinLayer.AddChild(pushpin, new Location(latitude, longitude), PositionOrigin.BottomCenter); } private void OnMouseClick(object sender, MapMouseEventArgs e) { Point clickLocation = e.ViewportPoint; Location location = x_Map.ViewportPointToLocation(clickLocation); AddPushpin(location.Latitude, location.Longitude); } private void OnMouseLeave(object sender, MouseEventArgs e) { Pushpin pushpin = sender as Pushpin; // remove the pushpin transform when mouse leaves pushpin.RenderTransform = null; } private void OnMouseEnter(object sender, MouseEventArgs e) { Pushpin pushpin = sender as Pushpin; // scaling will shrink (less than 1) or enlarge (greater than 1) source element ScaleTransform st = new ScaleTransform(); st.ScaleX = 1.4; st.ScaleY = 1.4; // set center of scaling to center of pushpin st.CenterX = (pushpin as FrameworkElement).Height / 2; st.CenterY = (pushpin as FrameworkElement).Height / 2; pushpin.RenderTransform = st; } }

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• JavaScript 'contenteditable' -- Getting/Setting Caret Position

  - by OneNerd

  I have read a few posts on positioning the caret, but none seem to answer my particular issue. I have 2 divs (div1 and div2) div1 = noneditable div div2 = contenteditable div both divs contain exact same contents when user clicks on div1, it gets hidden, and div2 appears in exact location and user can edit The problem: I want the caret to appear in exact location on div2 as div1 So, I need some way to READ the location where the user clicks on div1, and then when div2 appears place the cursor/caret in that same location, so a getCaretLocation(in_div_id) and setCaretLocation(in_div_id) set of functions. Any way to do that? Thanks -

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• Smoothly drag a Sprite in cocos2d - iPhone

  - by Saurabh

  Hi All I have implemented a drag on a sprite object as follows.. -(BOOL)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch * touch = [touches anyObject]; CGPoint location = [[Director sharedDirector] convertCoordinate: [touch locationInView:touch.view]]; [diskSprite setPosition:ccp(location.x , location.y )]; return kEventHandled; } but this dragging is not smooth..... when i drag fast with my thumb the object left from the path. Thanks

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• Android GPS timeout

  - by Scott Saunders

  I'm writing an Android application that, among other things, needs to send the current GPS coordinates to a server when the user tells it to. From a context menu, I run the service below. The service is a LocationListener and requests updates from the LocationManager. When it gets a location (onLocationChanged()), it removes itself as a listener and sends the coordinates off to the server. All of this is working. However, if GPS coordinates are not quickly available, my service just keeps running until it gets some. It holds up the UI with a progress dialog, which is annoying. Worse, if the user has moved since starting the service, the first GPS coordinates might be wrong and the app will send bad data to the server. I need a timeout on the service. Is there a good way to do that? I'm not very experienced with threads. I think I can run a Runnable in the onStartCommand() method that will somehow count down 30 seconds and then, if there is no GPS result yet, call my service's stop() method. Does that sound like the best way to do this? Alternatively, is it possible to tell if the GPS cannot get a fix? How would I go about doing that? Edit: To further clarify, I'm looking for the best way to "give up" on getting a Location after some amount of time. public class AddCurrentLocation extends Service implements LocationListener { Application app; LocationManager mLocManager; ProgressDialog mDialog; @Override public int onStartCommand(Intent intent, int arg0, int arg1) { app = getApplication(); // show progress dialog if (app.getScreen() != null) { mDialog = ProgressDialog.show(app.getScreen(), "", "Adding Location. Please wait...", true); } // find GPS service and start listening Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); mLocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); String bestProvider = mLocManager.getBestProvider(criteria, true); mLocManager.requestLocationUpdates(bestProvider, 2000, 0, this); return START_NOT_STICKY; } private void stop() { mLocManager.removeUpdates(this); if (mDialog != null) { mDialog.dismiss(); } stopSelf(); } @Override public void onLocationChanged(Location location) { // done with GPS stop listening mLocManager.removeUpdates(this); sendLocation(location); // method to send info to server stop(); } // other required methods and sendLocation() ... }

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• MSBuild cannot find SGen when compiling a solution

  - by Jaxidian

  I've looked at several other SGen-related questions on here and either their answers don't apply or their answers don't fix this for me. I have installed several SDKs to fix this issue with no luck. Reference types should not be changed since this is the only place this is a problem. Once suggestion is to put SGen.exe into the C:\Windows\Microsoft.NET\Framework\v3.5 folder, but that's not been done on the box where this is not a problem. In this scenario, SGen.exe actually exists and is right where it's supposed to be, but MSBuild still is having issues with finding it for some reason! Background: We have a NAnt script that automates our builds. In this scenario, NAnt is calling MSBuild and MSBuild is generating the error claiming to be unable to find SGen. The project is .NET 3.5-based. I have my primary dev environment (64-bit Vista Ultimate) where the script works perfectly and I am attempting to duplicate it in a VM (64-bit Win 7 Ultimate). I THINK I have everything to the point where I should be good-to-go but this fails on the Win7 box (works perfectly on the Vista box). I have done some comparisons between the two boxes and they both look identical in this regard, but it still fails. For example, the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework's sdkInstallRootv2.0 value is set to C:\Program Files\Microsoft.NET\SDK\v2.0 64bit\ on both machines. In both machines, SGen.exe is in that path's bin subdirectory. NAnt Script: <target name="report-installer" depends="fail-if-environment-not-set"> <exec program="MSBuild.exe" basedir="${framework35.directory}"> <arg value="${tools.directory.current}\ReportInstaller\ReportInstaller.sln" /> <arg value="/p:Configuration=${buildconfiguration.current}" /> </exec> </target> The error message I get is this: report-installer: [exec] Microsoft (R) Build Engine Version 3.5.30729.4926 [exec] [Microsoft .NET Framework, Version 2.0.50727.4927] [exec] Copyright (C) Microsoft Corporation 2007. All rights reserved. [exec] [exec] Build started 4/8/2010 11:28:23 AM. [exec] Project "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.sln" on node 0 (default targets). [exec] Building solution configuration "Release|Any CPU". [exec] Project "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.sln" (1) is building "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.csproj" (2) on node 0 (default targets). [exec] Could not locate the .NET Framework SDK. The task is looking for the path to the .NET Framework SDK at the location specified in the SDKInstallRootv2.0 value of the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework. You may be able to solve the problem by doing one of the following: 1.) Install the .NET Framework SDK. 2.) Manually set the above registry key to the correct location. [exec] CoreCompile: [exec] Skipping target "CoreCompile" because all output files are up-to-date with respect to the input files. [exec] C:\Windows\Microsoft.NET\Framework\v2.0.50727\Microsoft.Common.targets(1902,9): error MSB3091: Task failed because "sgen.exe" was not found, or the .NET Framework SDK v2.0 is not installed. The task is looking for "sgen.exe" in the "bin" subdirectory beneath the location specified in the SDKInstallRootv2.0 value of the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework. You may be able to solve the problem by doing one of the following: 1.) Install the .NET Framework SDK v2.0. 2.) Manually set the above registry key to the correct location. 3.) Pass the correct location into the "ToolPath" parameter of the task. [exec] Done Building Project "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.csproj" (default targets) -- FAILED. [exec] Done Building Project "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.sln" (default targets) -- FAILED. [exec] [exec] Build FAILED. [exec] [exec] "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.sln" (default target) (1) -> [exec] "C:\Projects\Production\Tools\ReportInstaller\ReportInstaller.csproj" (default target) (2) -> [exec] (GenerateSerializationAssemblies target) -> [exec] C:\Windows\Microsoft.NET\Framework\v2.0.50727\Microsoft.Common.targets(1902,9): error MSB3091: Task failed because "sgen.exe" was not found, or the .NET Framework SDK v2.0 is not installed. The task is looking for "sgen.exe" in the "bin" subdirectory beneath the location specified in the SDKInstallRootv2.0 value of the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework. You may be able to solve the problem by doing one of the following: 1.) Install the .NET Framework SDK v2.0. 2.) Manually set the above registry key to the correct location. 3.) Pass the correct location into the "ToolPath" parameter of the task. [exec] [exec] 0 Warning(s) [exec] 1 Error(s) [exec] [exec] Time Elapsed 00:00:00.24 [call] C:\Projects\Production\Source\reports.build(15,4): [call] External Program Failed: C:\Windows\Microsoft.NET\Framework\v3.5\MSBuild.exe (return code was 1) What am I doing wrong here that is causing MSBuild to STILL be unable to find SGen?

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• WPF 3D - Need help writing conversion methods between 2D and 3D (Point3DToPoint and PointAndZToPoint

  - by DanM

  I'm new to WPF 3D, so I may just be missing something obvious, but how do I convert from 3D to 2D and (for a given z location) from 2D to 3D? Specifically, I need two conversion methods: Point3DToPoint - If I have an (x, y, z) coordinate in the 3D world, how do I determine the (x, y) coordinate on the projected 2D surface. Method signature: public Point Point3DToPoint(Point3D point3D) PointAndZToPoint3D - If I have an (x, y) coordinate on the projected 2D surface and a z location in the 3D world, how do I determine the intersecting (x, y, z) coordinate in the 3D world? Method signature: public Point3D PointAndZToPoint3D(Point point, double z) I'd like the 2D coordinate to be the location measured from the upper-left corner of Viewport3D and the 3D coordinate to be the location relative to the origin (0, 0, 0) of the 3D world. Note 1: I found this related question, but it only addresses conversion from 3D to 2D (not the reverse), and I'm not sure if the answers are up-to-date. Note 2: I'm currently using .NET 3.5, but if there are improvements in .NET 4.0 that would help me, please let me know.

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• Optimized Image Loading in a UIScrollView

  - by Michael Gaylord

  I have a UIScrollView that has a set of images loaded side-by-side inside it. You can see an example of my app here: http://www.42restaurants.com. My problem comes in with memory usage. I want to lazy load the images as they are about to appear on the screen and unload images that aren't on screen. As you can see in the code I work out at a minimum which image I need to load and then assign the loading portion to an NSOperation and place it on an NSOperationQueue. Everything works great apart from a jerky scrolling experience. I don't know if anyone has any ideas as to how I can make this even more optimized, so that the loading time of each image is minimized or so that the scrolling is less jerky. - (void)scrollViewDidScroll:(UIScrollView *)scrollView{ [self manageThumbs]; } - (void) manageThumbs{ int centerIndex = [self centerThumbIndex]; if(lastCenterIndex == centerIndex){ return; } if(centerIndex >= totalThumbs){ return; } NSRange unloadRange; NSRange loadRange; int totalChange = lastCenterIndex - centerIndex; if(totalChange > 0){ //scrolling backwards loadRange.length = fabsf(totalChange); loadRange.location = centerIndex - 5; unloadRange.length = fabsf(totalChange); unloadRange.location = centerIndex + 6; }else if(totalChange < 0){ //scrolling forwards unloadRange.length = fabsf(totalChange); unloadRange.location = centerIndex - 6; loadRange.length = fabsf(totalChange); loadRange.location = centerIndex + 5; } [self unloadImages:unloadRange]; [self loadImages:loadRange]; lastCenterIndex = centerIndex; return; } - (void) unloadImages:(NSRange)range{ UIScrollView *scrollView = (UIScrollView *)[[self.view subviews] objectAtIndex:0]; for(int i = 0; i < range.length && range.location + i < [scrollView.subviews count]; i++){ UIView *subview = [scrollView.subviews objectAtIndex:(range.location + i)]; if(subview != nil && [subview isKindOfClass:[ThumbnailView class]]){ ThumbnailView *thumbView = (ThumbnailView *)subview; if(thumbView.loaded){ UnloadImageOperation *unloadOperation = [[UnloadImageOperation alloc] initWithOperableImage:thumbView]; [queue addOperation:unloadOperation]; [unloadOperation release]; } } } } - (void) loadImages:(NSRange)range{ UIScrollView *scrollView = (UIScrollView *)[[self.view subviews] objectAtIndex:0]; for(int i = 0; i < range.length && range.location + i < [scrollView.subviews count]; i++){ UIView *subview = [scrollView.subviews objectAtIndex:(range.location + i)]; if(subview != nil && [subview isKindOfClass:[ThumbnailView class]]){ ThumbnailView *thumbView = (ThumbnailView *)subview; if(!thumbView.loaded){ LoadImageOperation *loadOperation = [[LoadImageOperation alloc] initWithOperableImage:thumbView]; [queue addOperation:loadOperation]; [loadOperation release]; } } } } EDIT: Thanks for the really great responses. Here is my NSOperation code and ThumbnailView code. I tried a couple of things over the weekend but I only managed to improve performance by suspending the operation queue during scrolling and resuming it when scrolling is finished. Here are my code snippets: //In the init method queue = [[NSOperationQueue alloc] init]; [queue setMaxConcurrentOperationCount:4]; //In the thumbnail view the loadImage and unloadImage methods - (void) loadImage{ if(!loaded){ NSString *filename = [NSString stringWithFormat:@"%03d-cover-front", recipe.identifier, recipe.identifier]; NSString *directory = [NSString stringWithFormat:@"RestaurantContent/%03d", recipe.identifier]; NSString *path = [[NSBundle mainBundle] pathForResource:filename ofType:@"png" inDirectory:directory]; UIImage *image = [UIImage imageWithContentsOfFile:path]; imageView = [[ImageView alloc] initWithImage:image andFrame:CGRectMake(0.0f, 0.0f, 176.0f, 262.0f)]; [self addSubview:imageView]; [self sendSubviewToBack:imageView]; [imageView release]; loaded = YES; } } - (void) unloadImage{ if(loaded){ [imageView removeFromSuperview]; imageView = nil; loaded = NO; } } Then my load and unload operations: - (id) initWithOperableImage:(id<OperableImage>) anOperableImage{ self = [super init]; if (self != nil) { self.image = anOperableImage; } return self; } //This is the main method in the load image operation - (void)main { [image loadImage]; } //This is the main method in the unload image operation - (void)main { [image unloadImage]; }

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