usability | 易学教程

How to implement a blinking label on a form

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I have a form that displays queue of messages and number this messages can be changed. Really I want to blink label (queue length) when the number of messages were increased to improve form usability. Should I implement custom control and use additional thread or timer to change color of label? Has anybody implemented so functionality? What is the best solution (less resources and less performance degradation) to implement so behaviour? SOLUTION: Form's component with timer that can restrict number of animations per second and implement fade out effect to external control background color. You

Can I sort the tabs in Eclipse alphabetically?

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问题 Just a quick question: I'm using a lots of tabs in Eclipse and I wonder if there is a way to have them sorted alphabetically. Is there a settings I'm missing for years or a plugin that I'm unaware of? 回答1: No, but you can "Switch to Editor" ( Ctrl + Shift + E ) And then sort by name: 回答2: Apparently there is a behavior called MRU which does this sorting. To enable it (in Juno at least) go to Window->Preferences->General->Appearance and set the theme to "Classic" or "Windows 7 Classic". 回答3:

Whats the main advantage and disadvantage of “do not keep activities” in android

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One query I would like to have if anyone could answer it like: Do not keep activities options to be checked during testing android mobile application from developers options. I used it in my application and found that my application behaves inappropriately and crashed when I switched ON Do not keep activities in android. My questions were few : 1: How much this option will affect mobile applications? 2: What exactly does this do? It sounds like an app killer,I notice in the Developer Options there is a box that says Do not keep activities - destroy every activity as soon as the user leaves it

What's the best UI for entering date of birth? [closed]

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What is the best method for date of birth selector? 3 text inputs (month / day / year) or one mask input. User MUST use keyboard 3 select boxes. User can use keyboard or mouse. One nice datepicker . I want to know what is the most usable and problem free solution, so user wont be confused at all. For an advanced user text input is the best, if the user knows the date format, it is very fast. For a not so advanced user I suggest using a datepicker. Since usually you also have advanced and non-advanced users I suggest a combination of text input and datepicker. Patrick McElhaney If your goal is

document.write() vs inserting DOM nodes: preserve form information?

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Consider two web pages with the following in their body respectively: <body> <script> document.writeln('<textarea></textarea>') </script> </body> and <body> <script> var t = document.createElement('textarea'); document.body.appendChild(t); </script> </body> (think of them as part of something larger, where the textareas have to be generated from JavaScript and can't be hard-coded into the page). They both produce the same output, but the former is considered "bad", while the latter is considered the "right" way to do it. (Right?) On the other hand, if you type something in the page and then

Which screen reader would be best to test site accessibility and how to configure that? [closed]

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Which screen reader would be best to test site accessibility and how to configure that screen reader to test website (or default screen-reader setting would be ok) and which browser should be used to test accessibility with screen-readers? Free or commercial it doesn't matter . Which can give best testing then site should be accessible in whole world as much as possible with all other screen readers? my purpose is to make site as much as possible. Jared I will preface this answer by stating I’m a totally blind individual who uses Jaws as there only screen reader. I've played around with NVDA

When are modal dialogs truly necessary?

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Modal dialogs are evil, but I keep reading "You should remove modal dialogs when possible " When isn't it possible to remove modal dialogs? I mean, what are some truly modal tasks that force us to use evil modal dialogs? The most common given example is the "Do you want to Save?" I think this is the problem of the concept of having the user hit Save instead of remembering that user input is sacred . If you just saved automatically with the ability to "undo" or have revisions, then you don't ever need ask the user if they want to save. "Are you sure you want to delete?" Undelete "Are you sure

Mac OS X Lion, scrollbars, and website usability

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I have a number of overflowed divs that I use to display a lot of content in small space (like long lists, etc). Giving the divs the CSS rule of overflow: auto; always worked like a charm, giving the user scroll bars to indicate more content was available. This is kinda thrown out the window with Mac OS X Lion, which (as a default) hides the scroll bars unless you're actively scrolling. I like it when dealing with an application on my computer, because I think there are very strong visual clues that you can scroll to see more content. On webpage elements, it's a lot less clear, and I'm worried

How does Financial Times add a disclaimer when pasting text?

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Here is an example of what happens when pasting text from Financial Times, the top paragraph is added. Thanks in advance! Example: Please respect FT.com's ts&cs and copyright policy which allow you to: share links; copy content for >personal use; & redistribute limited extracts. Email ftsales.support@ft.com to buy additional rights >or use this link to reference the article - http://www.ft.com/cms/s/0/792f1aec- >9600-11e0-8256-00144feab49a.html#ixzz1PFrYZiD0 Goldman Sachs gave a paid internship to a top Libyan official’s relative while the bank was carrying >out lossmaking trades on behalf of

How to add one-click unsubscribe functionality to email newletters?

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I'd like to customize the "unsubscribe" links in our email newsletters so that they remove the recipient with a single click. Right now they just point to a generic page where the user has to enter their email address and select the newsletter from which they'd like to unsubscribe. It seems like this should be pretty straightforward, i.e. just include the email address and newsletter id as url parameters. But when I looked at examples from the lists I subscribe to, many don't include a recognizable address and most appear to be using what looks like guids and/or hashed values in the parameters