diff johndyer-mediaelement-13fa20a/src/js/mep-feature-volume.js @ 0:032bc65ebafc

added core components

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/johndyer-mediaelement-13fa20a/src/js/mep-feature-volume.js	Wed Mar 06 15:45:48 2013 +0000
@@ -0,0 +1,123 @@
+(function($) {
+	MediaElementPlayer.prototype.buildvolume = function(player, controls, layers, media) {
+		var mute = 
+			$('<div class="mejs-button mejs-volume-button mejs-mute">'+
+				'<button type="button"></button>'+
+				'<div class="mejs-volume-slider">'+ // outer background
+					'<div class="mejs-volume-total"></div>'+ // line background
+					'<div class="mejs-volume-current"></div>'+ // current volume
+					'<div class="mejs-volume-handle"></div>'+ // handle
+				'</div>'+
+			'</div>')
+			.appendTo(controls),
+		volumeSlider = mute.find('.mejs-volume-slider'),
+		volumeTotal = mute.find('.mejs-volume-total'),
+		volumeCurrent = mute.find('.mejs-volume-current'),
+		volumeHandle = mute.find('.mejs-volume-handle'),
+
+		positionVolumeHandle = function(volume) {
+
+			var 
+				top = volumeTotal.height() - (volumeTotal.height() * volume);
+
+			// handle
+			volumeHandle.css('top', top - (volumeHandle.height() / 2));
+
+			// show the current visibility
+			volumeCurrent.height(volumeTotal.height() - top + parseInt(volumeTotal.css('top').replace(/px/,''),10));
+			volumeCurrent.css('top',  top);
+		},
+		handleVolumeMove = function(e) {
+			var
+				railHeight = volumeTotal.height(),
+				totalOffset = volumeTotal.offset(),
+				totalTop = parseInt(volumeTotal.css('top').replace(/px/,''),10),
+				newY = e.pageY - totalOffset.top,
+				volume = (railHeight - newY) / railHeight
+
+			// TODO: handle vertical and horizontal CSS
+			// only allow it to move within the rail
+			if (newY < 0)
+				newY = 0;
+			else if (newY > railHeight)
+				newY = railHeight;
+
+			// move the handle to match the mouse
+			volumeHandle.css('top', newY - (volumeHandle.height() / 2) + totalTop );
+
+			// show the current visibility
+			volumeCurrent.height(railHeight-newY);
+			volumeCurrent.css('top',newY+totalTop);
+
+			// set mute status
+			if (volume == 0) {
+				media.setMuted(true);
+				mute.removeClass('mejs-mute').addClass('mejs-unmute');
+			} else {
+				media.setMuted(false);
+				mute.removeClass('mejs-unmute').addClass('mejs-mute');
+			}
+
+			volume = Math.max(0,volume);
+			volume = Math.min(volume,1);
+
+			// set the volume
+			media.setVolume(volume);
+		},
+		mouseIsDown = false;
+
+		// SLIDER
+		mute
+			.hover(function() {
+				volumeSlider.show();
+			}, function() {
+				volumeSlider.hide();
+			})		
+		
+		volumeSlider
+			.bind('mousedown', function (e) {
+				handleVolumeMove(e);
+				mouseIsDown = true;
+				return false;
+			});
+		$(document)
+			.bind('mouseup', function (e) {
+				mouseIsDown = false;
+			})
+			.bind('mousemove', function (e) {
+				if (mouseIsDown) {
+					handleVolumeMove(e);
+				}
+			});
+
+
+		// MUTE button
+		mute.find('button').click(function() {
+			if (media.muted) {
+				media.setMuted(false);
+				mute.removeClass('mejs-unmute').addClass('mejs-mute');
+				positionVolumeHandle(1);
+			} else {
+				media.setMuted(true);
+				mute.removeClass('mejs-mute').addClass('mejs-unmute');
+				positionVolumeHandle(0);
+			}
+		});
+
+		// listen for volume change events from other sources
+		media.addEventListener('volumechange', function(e) {
+			if (!mouseIsDown) {
+				positionVolumeHandle(e.target.volume);
+			}
+		}, true);
+
+		// set initial volume
+		positionVolumeHandle(player.options.startVolume);
+		
+		// shim gets the startvolume as a parameter, but we have to set it on the native <video> and <audio> elements
+		if (media.pluginType === 'native') {
+			media.setVolume(player.options.startVolume);
+		}
+	}
+
+})(mejs.$);