Applet Navigation
in [Java Programming]
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From: Roedy Green on 5 Mar 2010 03:00 I got asked this question about Applet use by blind people. I did not know the answer. "One question I was hoping you would answer what keystroke allows a user to get into an applet on a web page, or get out of an applet on a web page? I'm asking because if someone is disabled, a web app must perform all function without a mouse and only using a keyboard. When I go to you sample pages, it is easy to navigate using the keyboard (using Tab and Shift+Tab) to get to every field in the applet, but I cannot get out with the keyboard to get to the other links on the page. If I Alt+Tab to another application and back to the browser, then the focus is on the links of the web page and I can navigate to them with Tab and Shift+Tab, but I cannot get into the applet. The only way I can find to get into or out of the applet is using the mouse. How can this be done using *only* the keyboard?" -- Roedy Green Canadian Mind Products http://mindprod.com The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair. ~ Douglas Adams (born: 1952-03-11 died: 2001-05-11 at age: 49)
From: Knute Johnson on 5 Mar 2010 13:47 On 3/5/2010 12:00 AM, Roedy Green wrote: > I got asked this question about Applet use by blind people. I did not > know the answer. > > "One question I was hoping you would answer what keystroke allows a > user to get into an applet on a web page, or get out of an applet on a > web page? I'm asking because if someone is disabled, a web app must > perform all function without a mouse and only using a keyboard. > > When I go to you sample pages, it is easy to navigate using the > keyboard (using Tab and Shift+Tab) to get to every field in the > applet, but I cannot get out with the keyboard to get to the other > links on the page. If I Alt+Tab to another application and back to > the browser, then the focus is on the links of the web page and I can > navigate to them with Tab and Shift+Tab, but I cannot get into the > applet. > > The only way I can find to get into or out of the applet is using the > mouse. How can this be done using *only* the keyboard?" On Windows XP and FireFox 3.6 I can't get it to put the focus on an Applet without clicking on it directly. I've got an Applet, that under Linux, once I click off of it I can't click back to it at all. I have a feeling that this is a mess. -- Knute Johnson email s/nospam/knute2010/
From: John B. Matthews on 5 Mar 2010 15:17 In article <Wkckn.10165$bx3.10056(a)newsfe13.iad>, Knute Johnson <nospam(a)rabbitbrush.frazmtn.com> wrote: > On 3/5/2010 12:00 AM, Roedy Green wrote: > > I got asked this question about Applet use by blind people. I did > > not know the answer. > > > > "One question I was hoping you would answer what keystroke allows a > > user to get into an applet on a web page, or get out of an applet > > on a web page? I'm asking because if someone is disabled, a web > > app must perform all function without a mouse and only using a > > keyboard. > > > > When I go to you sample pages, it is easy to navigate using the > > keyboard (using Tab and Shift+Tab) to get to every field in the > > applet, but I cannot get out with the keyboard to get to the other > > links on the page. If I Alt+Tab to another application and back > > to the browser, then the focus is on the links of the web page and > > I can navigate to them with Tab and Shift+Tab, but I cannot get > > into the applet. > > > > The only way I can find to get into or out of the applet is using > > the mouse. How can this be done using *only* the keyboard?" > > On Windows XP and FireFox 3.6 I can't get it to put the focus on an > Applet without clicking on it directly. I've got an Applet, that > under Linux, once I click off of it I can't click back to it at all. > I have a feeling that this is a mess. Once the applet is focused, the "Reload" and "Back" keyboard shortcuts work in Safari 4: <http://www.apple.com/safari/download/> Of course, now I'm stochastically insulted: <http://mindprod.com/applet/insult.html> -- John B. Matthews trashgod at gmail dot com <http://sites.google.com/site/drjohnbmatthews>
From: Andrew Thompson on 6 Mar 2010 00:29
On Mar 5, 7:00 pm, Roedy Green <see_webs...(a)mindprod.com.invalid> wrote: >.."One question I was hoping you would answer what keystroke allows a > user to get into an applet on a web page, or get out of an applet on a > web page? ... Applet focus has always been a mess. To my knowledge, Sun never defined what should happen with applet focus and keyboard traversal, so whatever the browser maker feels is appropriate, is 'correct'. My experience has been: - On Windows with some JREs - the applet* got automatic focus and you needed to click somewhere else in the page to get focus to any HTML elements (or use the 'back' button etc.) - On windows with other JREs, the focus is left on the first focusable HTML element in the page, and the applet never gained the focus when cycling through the focusable elements. - On Ubuntu Linux with a Java 6 JRE, using Google Chrome or FireFox, the applet grabs the focus, and when you get to the last focusable element in the applet, the focus jumps to the focusable HTML elements. But on the second & subsequent passes through the focus cycle, the applet does *not* regain focus. The Ubuntu experience, while being better than anything I tried on Windows, is still not ideal. * Of course, if there were multiple applets in a web page, that complicates matters, some JRE/User Agent combos. will put the focus to the first applet listed in the page. Other JRE/UA combos. will apply focus to the first that has finished loading, still other JRE/UA combos. will provide the focus to the *last* applet to finish loading! The only *possible solution* to this mess that I can think of, is not going to be something you would like to hear. I reckon the best chance of getting the applet inserted into the normal page focus cycle, would be to use *JavaScript* to manage the focus. Note that I have never actually tried it, and I suspect your might have to change the applets themselves in order to make it workable. -- Andrew T. pscode.org |