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seekActiveTime Method

  • 아티클

This topic documents a feature of HTML+TIME 2.0, which is obsolete as of Windows Internet Explorer 9.

Locates a specified point on the element's active timeline and begins playing from that point.

Locates a specified point on the element's active timeline and begins playing from that point.

Syntax

object.seekActiveTime(iSeconds)

Parameters

iSeconds Required. An Integer that specifies a point on the element's active timeline. The element's timeline immediately begins playing from the specified point. Legal values range from 0 to activeDur.

Return Value

No return value.

Remarks

If you attempt to seek to a time on an object that is not currently active, an error is generated. To prevent this, check the object's status using the isActive property.

Not all media types support seeking. In cases where seeking is not supported by the player, calls to seek methods are ignored.

Example

The following example demonstrates how to use the seekActiveTime method. Before validating and implementing the seekActiveTime value, make sure the object is active, or an error might be generated. In this example, if the object is not active, the beginElement method is called to restart the object, followed by the seekActiveTime method request.

<HTML xmlns:t= "urn:schemas-microsoft-com:time">
<HEAD>
<TITLE>seekActiveTime Method</TITLE>

<?IMPORT namespace="t" implementation="#default#time2">
<STYLE>
    .time{behavior:url(#default#time2)}
</STYLE>
<SCRIPT>
function doSeekActiveTime(){
    //Is media object active?
    //Yes, continue and do seek.
    //No, restart element using the beginElement method.
    if(!oMedia.currTimeState.isActive){
        oMedia.beginElement();
    }
    //Is user input valid and within the media's duration boundaries?
    if(isFinite(seekActiveTimeInput.value) && seekActiveTimeInput.value
        <= oMedia.mediaDur && seekActiveTimeInput.value > 0){
        oMedia.seekActiveTime(seekActiveTimeInput.value);
    }else{
        //Input is not valid, alert user to re-enter choice.
        alert("Please enter a valid integer. Value must be greater than 0" +
            " seconds and less than the media's duration (" + 
            oMedia.mediaDur + " seconds).");
        seekActiveTimeInput.focus();
    }
}
</SCRIPT>
</HEAD>

<BODY>        
<CENTER>
<B>Media timer:</B>
<SPAN id="Timer2" class="time" dur=".01" repeatCount="indefinite" fill="hold"
    onrepeat="innerText=parseInt(oMedia.currTimeState.activeTime);">0</SPAN>
<BR><BR>
<t:video style="width:175px; height:150px;" id="oMedia"
    src="/workshop/samples/author/behaviors/media/movie.avi"
    onmediacomplete="oMediaDur.innerText=oMedia.mediaDur;" />
<BR>
Media's duration: <SPAN id="oMediaDur"></SPAN>&nbsp;seconds
<BR><BR>
<B>Enter value for seekActiveTime</B>: 
    <INPUT type="text" value="" name="seekActiveTimeInput" size="3"/>&nbsp;seconds
<BR><BR>
<BUTTON id="seekBtn" onClick="doSeekActiveTime();">Click to seek</BUTTON>&nbsp;
<BUTTON onClick="oMedia.beginElement()">Restart</BUTTON>
</CENTER>
</BODY>
</HTML>

Code example: http://samples.msdn.microsoft.com/workshop/samples/author/behaviors/seekactivetime.htm

Applies To

t:TRANSITIONFILTER, t:ANIMATE, t:ANIMATECOLOR, t:ANIMATEMOTION, t:ANIMATION, t:AUDIO, t:IMG, t:MEDIA, t:PAR, t:REF, t:SEQ, t:SET, time2, t:VIDEO

See Also

Introduction to HTML+TIME, seekSegmentTime, seekTo