albert::QueryExecution Class Reference

#include <albert/queryexecution.h>

Description

Abstract asynchronous query execution interface.

Controls the execution of a query, reports busy state and allows to fetch results on demand.

Inherits QObject.

Public Member Functions
	QueryExecution (QueryContext &context)
	Constructs a query execution for context
virtual void	cancel ()=0
	Cancels the query processing.
virtual void	fetchMore ()=0
	Fetches more results.
virtual bool	canFetchMore () const =0
	Returns true if there are more results to fetch, otherwise returns false.
virtual bool	isActive () const =0
	Returns true if the query is being processed, otherwise returns false.

Public Attributes
const uint	id
	The unique id of this query execution.
const QueryContext &	context
	The query context of this query execution.
QueryResults	results
	The results of this query.

Signals
void	activeChanged (bool active)
	Emitted when query processing started or finished.

Constructor & Destructor Documentation

QueryExecution()

albert::QueryExecution::QueryExecution

(

QueryContext &

context

)

Constructs a query execution for context

Member Function Documentation

activeChanged

void albert::QueryExecution::activeChanged ( bool  active )

signal

Emitted when query processing started or finished.

Note

The UI state machine expects results to be added only while active is true.

cancel()

virtual void albert::QueryExecution::cancel ( )

pure virtual

Cancels the query processing.

canFetchMore()

virtual bool albert::QueryExecution::canFetchMore ( ) const

pure virtual

Returns true if there are more results to fetch, otherwise returns false.

fetchMore()

virtual void albert::QueryExecution::fetchMore ( )

pure virtual

Fetches more results.

isActive()

virtual bool albert::QueryExecution::isActive ( ) const

pure virtual

Returns true if the query is being processed, otherwise returns false.

Member Data Documentation

context

const QueryContext& albert::QueryExecution::context

The query context of this query execution.

id

const uint albert::QueryExecution::id

The unique id of this query execution.

results

QueryResults albert::QueryExecution::results

The results of this query.

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The documentation for this class was generated from the following file:

• workspace/albert/include/albert/queryexecution.h