scripts/position.js
author Dan
Fri, 25 Apr 2008 12:42:26 -0400
changeset 18 69af47034212
parent 11 0faea3a6c881
child 42 774751e7faed
permissions -rw-r--r--
Added page-titling functionality that changes document.title to match the current track; made position slider reset to zero on stop or playlist end
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var pos_supported = false;
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var pos_in_drag = false;
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var posslide_init = function()
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{
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  // make sure the theme supports the playhead
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  var base = document.getElementById('playhead');
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  var inner = document.getElementById('playhead-filler');
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  var slider = document.getElementById('playhead-button');
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  if ( !slider || !inner || !base )
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    return false;
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  pos_supported = true;
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  var minX = $(base).Left() - 3;
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  var minY = $(base).Top() + 3;
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  var maxY = minY;
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  var maxX = minX + $(base).Width() - 6;
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  Drag.init(slider, slider, minX, maxX, minY, maxY);
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  slider.onDrag = posslide_handle_drag;
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  slider.onDragEnd = posslide_handle_dragend;
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  slider.onDragStart = function(x, y) { pos_in_drag = true; };
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  base.onclick = posslide_handle_click;
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  posslide_set_position(0);
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  slider.style.top = minY + 'px';
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}
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var posslide_handle_drag = function(x, y, do_inner)
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{
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  var inner = document.getElementById('playhead-filler');
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  var slider = document.getElementById('playhead-button');
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  var size = x - $(inner).Left() + 8;
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  if ( do_inner )
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    inner.style.width = size + 'px';
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  if ( ( pos_in_drag && !do_inner ) || ( !pos_in_drag && do_inner ) )
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    slider.style.left = ( x ) + 'px';
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}
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var posslide_handle_dragend = function(x, y)
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{
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  pos_in_drag = false;
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  var inner = document.getElementById('playhead-filler');
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  var base = document.getElementById('playhead');
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  var multiplier = $(base).Width();
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  var pos = x - $(inner).Left() + 8;
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  pos = 100 * ( pos / multiplier );
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  set_playback_position(pos);
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}
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var posslide_handle_click = function(e)
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{
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  e = Drag.fixE(e);
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  var base = document.getElementById('playhead');
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  var val = e.clientX - $(base).Left();
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  val = 100 * ( val / $(base).Width() );
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  posslide_set_position(val);
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  set_playback_position(val);
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}
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function posslide_set_position(pos)
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{
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  if ( !pos_supported )
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    return false;
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  // pos needs to be 1-100
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  var base = document.getElementById('playhead');
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  var multiplier = $(base).Width();
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  pos = ( pos / 100 ) * multiplier;
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  var left = pos + $(base).Left();
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  posslide_handle_drag(left, 0, true);
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}
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addOnloadHook(posslide_init);
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