Location:
APGTASK.H
Link against: apgrfx.lib
class TApaTaskList;
Accesses tasks running on a device.
Tasks can be identified by document, application specific UID or by caption name.
Users of this class can also cycle through a set of tasks running a specific application, bringing each one, in turn, into the foreground.
Defined in TApaTaskList
:
CycleTasks()
, EBackwards
, EForwards
, FindApp()
, FindApp()
, FindByPos()
, FindDoc()
, TApaTaskList()
, TCycleDirection
IMPORT_C TApaTaskList(RWsSession &aWsSession);
Constructs the task list object, taking a reference to a window server session.
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IMPORT_C TApaTask FindApp(const TDesC &aAppName);
Searches for a task that has the specified caption.
The result of the search depends on the number of tasks that have the specified caption.
If there is only one task, then that task is returned.
If there is more than one task, then the task returned depends on whether the first one found is in the foreground:
if the first task found is in the foreground, then the task returned by this function is the one with the highest window group ordinal value, i.e. the task which is furthest from the foreground.
if the first task found is not in the foreground, then that is the task that is returned.
If no matching task is found, then the object returned is an empty task, and calling TApaTask::Exists()
on it returns false.
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IMPORT_C TApaTask FindDoc(const TDesC &aDocName);
Searches for the task that is handling the specified document.
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IMPORT_C TApaTask FindByPos(TInt aPos);
Searches for a task by the ordinal position of its window group.
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IMPORT_C TApaTask FindApp(TUid aAppUid);
Searches for a task running the specified application.
The result of the search depends on the number of tasks that are running the specified application.
If there is only one task, then that task is returned.
If there is more than one task, then the task returned depends on whether the first one found is in the foreground:
if the first task found is in the foreground, then the task returned by this function is the one with the highest window group ordinal value, i.e. the task which is furthest from the foreground.
if the first task found is not in the foreground, then that is the task that is returned.
If no matching task is found, then the object returned is an empty task, and calling TApaTask::Exists()
on it returns false.
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IMPORT_C TInt CycleTasks(TUid aAppUid, TCycleDirection aDirection=EForwards);
Brings the next task in the set of tasks running the specified application to the foreground.
If there is only one task, then no change occurs.
If the foremost task in the set is not the foreground task, then this is made the foreground task.
Thereafter, successive calls to this function bring the next task in the set to the foreground. The direction of the cycling can be specified and has the following effect:
for the forwards direction, the foreground task is sent to the background; the next foremost task is made the foreground task.
for the backwards direction, the task with the highest window group ordinal value, i.e. the task in the set which is furthest from the foreground, is brought to the foreground. The task that was the foremost task in the set is moved back by one position.
If the task brought to the foreground uses the View architecture, then the its top view is activated.
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TCycleDirection
Defines the direction in which tasks are cycled to the foreground. This is used by the CycleTasks()
function.
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