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  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

<task id="GUID-FC46AA09-3E04-426B-BAC0-A992EA1AE0B6" xml:lang="en"><title>Write

a conversion observer</title><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context>       <p>Converter clients can supply a converter observer object

by implementing the <codeph>MConverterUiObserver</codeph> interface. The object

is passed to the converter's <codeph>CConverterBase2::ConvertL()</codeph>, <codeph>CConverterBase2::ConvertObjectL()</codeph>, <codeph>CConverterBase2::ConvertAL()</codeph> or <codeph>CConverterBase2::ConvertObjectAL()</codeph> function. It is used

for reporting on the progress of multi-step conversions and for requesting

a password from the client when the file being converted from is password-protected.</p><p>The

following functions can be implemented:</p><ul>

<li><p><codeph>virtual void MaxSteps(TInt aMax, TInt aObject)=0;</codeph> to

get the maximum number of steps that the conversion operation can take. </p></li>

<li><p><codeph>virtual TInt Result(TInt aResult, TInt aObject)=0;</codeph> to

take some action following an error in the conversion.</p></li>

<li><p><codeph>virtual HBufC* QueryPasswordL(const TDesC&amp; aClue)=0;</codeph> to

request a password from the user in order to access the data.</p></li>

</ul></context>

</taskbody></task>