{"id":16,"date":"2004-03-25T16:21:46","date_gmt":"2004-03-25T23:21:46","guid":{"rendered":"\/?p=16"},"modified":"2004-03-25T16:21:46","modified_gmt":"2004-03-25T23:21:46","slug":"overloaded-buttons","status":"publish","type":"post","link":"https:\/\/www.slimjimmy.com\/weblog\/archives\/2004\/03\/25\/overloaded-buttons\/","title":{"rendered":"Overloaded buttons"},"content":{"rendered":"<p>A lot of audio players like to combine Play and Pause buttons.  If a song is playing, pressing the Play button again pauses the track; if a song is paused, pressing the Play button resumes playing.  It makes sense and reduces the number of buttons, right?<\/p>\n<p>Winamp does not take this approach, and I commend its developers for it.<\/p>\n<p>On the surface, combining these two buttons seems like a great idea.  However, let&#8217;s suppose you want to replay the current track.  Maybe you&#8217;re not paying attention and suddenly realize that the song you&#8217;re listening to is a favorite that you haven&#8217;t heard in a while, or maybe you&#8217;re just in the mood to listen to a particular song over and over.<\/p>\n<p>In Winamp&#8217;s separate button design, if a song is playing, pressing the Play button again re-plays the current track.  In the combined button design, pressing the Previous Track button typically returns to the track&#8217;s beginning.  Seems like a sound design so far.<\/p>\n<p>Now let&#8217;s suppose you want to skip to the previous track.  In the separate button design, the Previous Track button <em>always<\/em> selects the previous track.  In the combined button design, however, the Previous Track button only <em>sometimes<\/em> selects the previous track, since it&#8217;s also used to restart the <em>current<\/em> track.  Typically the button skips to the previous track only if it&#8217;s already at the beginning to another track&#8212;the &#8220;beginning&#8221; defined as some arbitrary number of seconds.<\/p>\n<p><strong>Thus, overloading the Play button with pausing functions means we need to overload the Previous Track button too.<\/strong>  Furthermore, overloading the Previous Track button requires introducing either time-dependent behavior or button modality.  <strong>That&#8217;s a significant increase in interface complexity<\/strong> to save a single button. (The Previous Track and Next Track buttons typically have <em>another<\/em> behavior too; they seek within tracks when the buttons are held down.)<\/p>\n<p><strong>Increasing interface complexity increases error rates.<\/strong>  My car stereo uses the combined button approach, and it makes it difficult for me to navigate backwards through CD tracks when I want to find a particular track.  I need to listen for a few seconds to determine which track is which, and depending on how long I wait to listen, I sometimes need to press the Previous Track button once and sometimes twice.  This is even more problematic when I&#8217;m driving and not looking at the track number.<\/p>\n<p>Makers of software-based audio players have nothing to lose by providing separate buttons; virtual buttons have no monetary cost.  Makers of car stereos should provide separate buttons because it&#8217;s a little safer.<\/p>\n<p>(Although I prefer separate buttons, if space is at a premium, a respectable compromise might be to combine the Pause and Stop buttons instead.  If pressed briefly, pause; if held down, stop.  If the Stop button has been done away with too, then perhaps holding down the Play button can replay the current track.)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A lot of audio players like to combine Play and Pause buttons. If a song is playing, pressing the Play button again pauses the track; if a song is paused, pressing the Play button resumes playing. It makes sense and reduces the number of buttons, right? Winamp does not take this approach, and I commend [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,6],"tags":[],"class_list":["post-16","post","type-post","status-publish","format-standard","hentry","category-rantsraves","category-usability"],"_links":{"self":[{"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/posts\/16","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/comments?post=16"}],"version-history":[{"count":0,"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/posts\/16\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/media?parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/categories?post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.slimjimmy.com\/weblog\/wp-json\/wp\/v2\/tags?post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}