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  • How to get users to read error messages?

    - by FX
    If you program for a nontechnical audience, you find yourself at a high risk that users will not read your carefully worded and enlightening error messages, but just click on the first button available with a shrug of frustration. So, I'm wondering what good practices you can recommend to help users actually read your error message, instead of simply waiving it aside. Ideas I can think of would fall along the lines of: Formatting of course help; maybe a simple, short message, with a "learn more" button that leads to the longer, more detailed error message Have all error messages link to some section of the user guide (somewhat difficult to achieve) Just don't issue error messages, simply refuse to perform the task (a somewhat "Apple" way of handling user input) Edit: the audience I have in mind is a rather broad user base that doesn't use the software too often and is not captive (i.e., not an in-house software or narrow community). A more generic form of this question was asked on slashdot, so you may want to check there for some of the answers.

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  • problem with two .NET threads and hardware access

    - by mack369
    I'm creating an application which communicates with the device via FT2232H USB/RS232 converter. For communication I'm using FTD2XX_NET.dll library from FTDI website. I'm using two threads: first thread continuously reads data from the device the second thread is the main thread of the Windows Form Application I've got a problem when I'm trying to write any data to the device while the receiver's thread is running. The main thread simply hangs up on ftdiDevice.Write function. I tried to synchronize both threads so that only one thread can use Read/Write function at the same time, but it didn't help. Below code responsible for the communication. Note that following functions are methods of FtdiPort class. Receiver's thread private void receiverLoop() { if (this.DataReceivedHandler == null) { throw new BackendException("dataReceived delegate is not set"); } FTDI.FT_STATUS ftStatus = FTDI.FT_STATUS.FT_OK; byte[] readBytes = new byte[this.ReadBufferSize]; while (true) { lock (FtdiPort.threadLocker) { UInt32 numBytesRead = 0; ftStatus = ftdiDevice.Read(readBytes, this.ReadBufferSize, ref numBytesRead); if (ftStatus == FTDI.FT_STATUS.FT_OK) { this.DataReceivedHandler(readBytes, numBytesRead); } else { Trace.WriteLine(String.Format("Couldn't read data from ftdi: status {0}", ftStatus)); Thread.Sleep(10); } } Thread.Sleep(this.RXThreadDelay); } } Write function called from main thread public void Write(byte[] data, int length) { if (this.IsOpened) { uint i = 0; lock (FtdiPort.threadLocker) { this.ftdiDevice.Write(data, length, ref i); } Thread.Sleep(1); if (i != (int)length) { throw new BackendException("Couldnt send all data"); } } else { throw new BackendException("Port is closed"); } } Object used to synchronize two threads static Object threadLocker = new Object(); Method that starts the receiver's thread private void startReceiver() { if (this.DataReceivedHandler == null) { return; } if (this.IsOpened == false) { throw new BackendException("Trying to start listening for raw data while disconnected"); } this.receiverThread = new Thread(this.receiverLoop); //this.receiverThread.Name = "protocolListener"; this.receiverThread.IsBackground = true; this.receiverThread.Start(); } The ftdiDevice.Write function doesn't hang up if I comment following line: ftStatus = ftdiDevice.Read(readBytes, this.ReadBufferSize, ref numBytesRead);

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  • How do CSS sprites work?

    - by Rachel
    I have 3 different images and want to create a sprite using CSS. I understand that will reduce HTTP requests. However, I am totally new to this concept and have no idea as to how to approach this. What would be best bet for me? Also I have seen there are some CSS sprite generators where you submit a .zip of images and it combines them. I tried doing that, but did not understood what was happening. Any guidance regarding creating and using CSS sprites would be highly appreciated. Update: I have gone through the A List Part article but it was not very clear to me. Can someone provide an example of using a CSS sprite? [A short, self-contained example in an answer is preferable for SO than just a link to an example elsewhere. –ed.]

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  • Best UI to be shown to User while his request is still in process behind the scenes ?

    - by Rachel
    I am currently involved with an Application where I need to design the UI part of the Application and current I am in the process of implementation of UI which would be displayed to end user while his or her request is being processed behind the scenes. So my question is that: What is the best UI approach/symbol/suggestions to be displayed to end User while his or her request is still being processed behind the scenes ? Thanks.

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  • Best tools for creating website wireframes

    - by Alison
    When creating a wireframe for a website, I always start with a Visio wireframe stencil from Garrett Dimon. The stencil is amazing but it has been a few years since it has been updated and I'm looking for something new and exciting. What wireframing tool(s) do you use, if any?

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  • UI Terminology: Logon vs Login

    - by Brad Leach
    I am crafting an application and cannot decide whether to use the terms Login/out or Logon/off. Is there a more correct option between these two? Should I use something else entirely (like "Sign on/off"). In terms of usability, as long as I am consistent it probably doesn't matter which terms I choose, but I did wonder about the origins of the terms - and whether one or another makes more grammatical sense. I also care deeply about the application I am creating, and want to take the time to investigate all aspects of its user experience.

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  • Functional testing of a 3-rd party java program

    - by Dmitri Nesteruk
    I have a 3-rd party java application (I don't own source code) and I want to perform functional testing on it, similar to the way it's done in watin/watij/selenium/nunitforms etc. Can anyone suggest a library that I can use to do this sort of testing. What I'm interested in is clicking the applet's buttons, reading off text values, and the like. Thanks!

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  • Know any unobstrusive, simple GUI guidelines or design recommendations for notifications?

    - by Vinko Vrsalovic
    Hello again. I'm in the process of designing and testing various ideas for an application whose main functionality will be to notify users of occurring events and offer them with a choice of actions for each. The standard choice would be to create a queue of events showing a popup in the taskbar with the events and actions, but I want this tool to be the less intrusive and disrupting as possible. What I'm after is a good book or papers on studies of how to maximize user productivity in these intrinsically disruptive scenarios (in other words, how to achieve the perfect degree of annoying-ness, not too much, not too little). The user is supposedly interested in these events, they subscribe to them and can choose the actions to perform on each. I prefer books and papers, but the usual StackOverflow wisdom is appreciated as well. I'm after things like: Don't use popups, use instead X Show popups at most 3 seconds Show them in the left corner Use color X because it improves readability and disrupts less That is, cognitive aspects of GUI design that would help users in such a scenario.

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  • Storyboard elements are not sized properly on the device

    - by Joel Fischer
    In the storyboard, I am placing a table view element into a subclassed UIView. The element is not appearing on the iPad device I am running it on the same as it appears in the storyboard however. This also happens for additional content that I place into the storyboard. Below is a screenshot as it appears in the storyboard, as well as UI width/height information. And here is the description of the UI file running on the iPad. https://gist.github.com/4323186 (embedding it directly into the post is giving me problems) You'll notice that the tableview is explicitly set at 178 width, and is showing up in the description as 276 width. My initial thought was that perhaps a cell was forcing the parent to be larger (I'm very new to iOS UI development), but drilling into that shows the prototype cell it appears that the width is defined by it's parent at 178. The image views and label also are appearing in the incorrect spot, as shown in the second image below.

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  • View outlet not set with UINavigationController

    - by Sheehan Alam
    I have a NIB that contains a UINavigationController which has a UIViewController. The UIViewController is being loaded externally from another nib. I am unable to set the view property thus I get the error: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "LBRootViewController" nib but the view outlet was not set.' How can I set my view property correctly?

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  • Can NSCollectionView autoresize the width of its subviews to display one column

    - by littlecharva
    Hi, I have an NSCollectionView that contains a collection of CustomViews. Initially it tiled the subviews into columns and rows like a grid. I then set the Columns property in IB to 1, so now it just displays them one after another in rows. However, even though my CustomView is 400px wide, it's set to autoresize, the NSCollectionView is 400px wide, and it's set to 1 column, the subviews are drawn about 80px wide. I know I can get around this by calling: CGFloat width = [collectionView bounds].size.width; NSSize size = NSMakeSize(width, 85); [collectionView setMinItemSize:size]; [collectionView setMaxItemSize:size]; But putting this code in the awakeFromNib method of my WindowController only sets the correct width when the program launches. When I resize the window (and the NSCollectionView autoresizes as I've specified), the CustomViews stay at their initially set width. I'm happy to take care of resizing the subviews myself if need be, but I'm quite new to Cocoa and can't seem to find any articles explaining how to do such a thing. Can someone point me in the right direction? Anthony

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  • Artistic aspects of UI?

    - by anon
    Consider a single button. At one extreme, we have a black OpenGL window, with: outline (in white) of a rectangle bitmap remdered font inside of it, saying "Ok" At the other extreme, we have Mac OS X, a button that is: well rounded has some gradient showing light effects on it nice antialiased "OK" soft shadow of some sort These two UIs present very very different user experiences. The former says "This is from the 80s" the latter says "this is professional". This is something I do not understand well as a programmer (and don't know where to learn about this). Does anyone know of a good technical resource for this? [I'd prefer things that draws upon psychology / perception literature to say why to do something rather than design books that just says "use color XYZ with a gradient of blah"]

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  • How do I make this scroll layout work?

    - by JuiCe
    I am currently trying to get my UI to have a Title Bar, a bottom Button bar, with a ScrollView in between. I can get bits and pieces of it to work, but once I get a different piece working, the old part goes back to not showing up. Here is a picture of my UI on the left, with what I want it to look like on the right...(sorry for the sloppiness, I edited it in MS Paint :P ) To sum it up, I want the Version and Type fields to be moved with room for the other TextViews in the XML file, and I want both buttons to appear on the bottom bar. EDIT : The buttons on the bottom should be equal in size, I'm not too talented in making boxes in MS Paint EDIT 2 : Sorry....here is my XML file <?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:weightSum="1.0" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="SN : " /> <TextView android:id="@+id/serialNumberView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="Ver : " /> <TextView android:id="@+id/versionView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="Type : " /> <TextView android:id="@+id/typeView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" /> </LinearLayout> <ScrollView android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" > <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:layout_weight="1"> <CheckBox android:id="@+id/floatCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Float" /> <CheckBox android:id="@+id/tripCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Trip" /> <CheckBox android:id="@+id/closeCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Close" /> <CheckBox android:id="@+id/blockedCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Blocked" /> <CheckBox android:id="@+id/hardTripCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hard Trip" /> <CheckBox android:id="@+id/phaseAngleCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Phase angle wrong for closing" /> <CheckBox android:id="@+id/diffVoltsCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Differential volts too low" /> <CheckBox android:id="@+id/networkVoltsCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Network volts too low to close" /> <CheckBox android:id="@+id/usingDefaultsCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Using Defaults( Reprogram )" /> <CheckBox android:id="@+id/relaxedCloseActiveCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Relaxed Close Active" /> <CheckBox android:id="@+id/commBoardDetectedCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Comm Board Detected" /> <CheckBox android:id="@+id/antiPumpBlock" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Anti-Pump Block" /> <CheckBox android:id="@+id/motorCutoffCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Motor Cutoff Inhibit" /> <CheckBox android:id="@+id/phaseRotationCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Phase Rotation Wrong" /> <CheckBox android:id="@+id/usingDefaultDNPCheck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text= "Using Default DNP Profile" /> </LinearLayout> </ScrollView> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_weight="1" > <Button android:id="@+id/button3" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="Back" /> <Button android:id="@+id/button3" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="Read" /> </LinearLayout> </LinearLayout>

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  • Soft keyboard does not show when Activity starts

    - by Sarp Centel
    I have added android:windowSoftInputMode="stateAlwaysVisible" to my Activity in AndroidManifest.xml and here's my layout: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <EditText android:id="@+id/EditText01" android:layout_width="wrap_content" android:layout_height="wrap_content"></EditText> <EditText android:id="@+id/EditText02" android:layout_width="wrap_content" android:layout_height="wrap_content"></EditText> <Button android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Send"></Button> </LinearLayout> When the Activity starts, the EditText is focused, but soft keyboard isn't displayed. If I click on the EditText, then I see the soft keyboard. Do I need to set aditional parameters to display soft keyboard when my Activity starts? Thanks

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  • Tooltips with infinite timeout?

    - by romkyns
    I'm thinking of setting the timeout on all my tooltips in a WinForms application to infinity (or an extremely large value). The motivation is that it's annoying for the user if the tooltip disappears while I'm still reading it, without providing any extra value whatsoever as far as I can tell. Normally I wouldn't ask something like this on StackOverflow, but the overwhelming majority of all software sets timeouts on tooltips, so it makes me wonder whether perhaps there is some important consideration I'm missing? Or is this just an old convention that nobody gives further thought to? If you would hate infinite timeout as opposed to a short timeout, please explain why. (If you just think tooltips are a bad idea altogether then that's a separate consideration; this question is specifically about the infinite timeout.)

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  • javascript removeChild() and appendChild() VS display=none and display=block|inline

    - by Kucebe
    I'm developing a web application that shows some controls and descriptions dinamically (I don't want to use jQuery or other libraries). At this moment i make appear and disappear controls using: element.setAttribute("style", "inline"); and element.setAttribute("style", "none"); but i'm thinking about using: element.appendChild(childRef); and element.removeChild(childRef); So, which one is the best solution in terms of system speed and elegance of the code? (and of course, are there better solution?)

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  • Resources for Programmatic Rendering of Topology Maps

    - by bn
    Servus, Do you know of any frameworks, APIS, languages, or other resources that are well suited for drawing topology maps that allow a user to interact with objects on the map? I am not constrained by language choice and the program can be web-based, or stand-alone. I thought I would check before rolling my own. My goal is not to draw cartographic maps, but more like this picture: http://www.fineconnection.com/files/images/GraphicalNM.PNG, or if you are familiar with Edward Tufte's books, the data-visualization mechanisms he describes such as a map of a metro or subway. Also, if you have had any experience rendering these types of user interfaces or usage of underlying datastructures, I would be grateful to hear any thoughts you have on the subject, advice, any "gotchas." Thank you very for your time, -bn

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  • Get text of button from IBAction - iPhone

    - by Organiccat
    When an IBAction is called: -(IBAction) onClick1: (id) sender; What is passed in the sender? Since it's hooked up through the IB, I'm not really sure. My question is how to get the text of the button to be the passed object (NSString most likely) so that I could call it inside the action implementation. -(IBAction) onClick1: (id) sender { NSLog(@"User clicked %@", sender); // Do something here with the variable 'sender' }

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  • Most Astonishing Violation of the Principle of Least Astonishment

    - by Adam Liss
    The Principle of Least Astonishment suggests that a system should operate as a user would expect it to, as much as possible. In other words, it should never "astonish" the user with unexpected behavior. In your experience as the "astonishee," what types of systems are the worst offenders, and if you were the project manager, how would you correct the problem? Bonus if your answer describes how you'd retrain the developers!

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  • Building a complex view with Three20 - resources?

    - by psychotik
    I'm using three20 for most of my iPhone app. One of the views I need to create is relatively complex. It needs a top bar (under the nav bar) with some controls and label, an image view below this bar (which occupies most of the body) and another bottom bar with more controls and labels (above the tab bar control). I don't have much UI experience - my only experience with anything UI is laying stuff out using CSS, etc on websites. Apple's online doc seems to assume that the reader knows a bunch about rectangles, layouts, frames, etc or is using InterfaceBuilder. And three20 isn't too well documented either. So my question is: Is it possible to design something like what I describe in IB and then still have a three20-based app use it? If so, any tips/pointers on how would be much appreciated. Can you point me to some documentation that explain how views/controls etc are rendered. I'm pretty sure I can figure it out if I find some decent explanation/tutorial for it.

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