| 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.
| Public Member Functions | |
|---|---|
| TApaTaskList(RWsSession &) | |
| IMPORT_C TInt | CycleTasks(TUid, TCycleDirection) |
| IMPORT_C TApaTask | FindApp(const TDesC &) |
| IMPORT_C TApaTask | FindApp(TUid) |
| IMPORT_C TApaTask | FindByPos(TInt) |
| IMPORT_C TApaTask | FindDoc(const TDesC &) |
| Private Member Functions | |
|---|---|
| void | FindByPosL(TApaTask &, TInt) |
| Public Member Enumerations | |
|---|---|
| enum | TCycleDirection { EForwards, EBackwards } |
| Private Attributes | |
|---|---|
| TInt | iTApaTaskList_Reserved1 |
| RWsSession & | iWsSession |
| IMPORT_C | TApaTaskList | ( | RWsSession & | aWsSession | ) |
Constructs the task list object, taking a reference to a window server session.
| RWsSession & aWsSession | The window server session. |
| 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.
| TUid aAppUid | The application specific UID. |
| TCycleDirection aDirection = EForwards | The direction of cycling. |
| 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.
| const TDesC & aAppName | The caption. |
| 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.
| TUid aAppUid | The application specific UID. |
| IMPORT_C TApaTask | FindByPos | ( | TInt | aPos | ) |
Searches for a task by the ordinal position of its window group.
| TInt aPos | The ordinal position of a task's window group. A zero value refers to the foreground task. |
| IMPORT_C TApaTask | FindDoc | ( | const TDesC & | aDocName | ) |
Searches for the task that is handling the specified document.
| const TDesC & aDocName | The name of the document. |
Defines the direction in which tasks are cycled to the foreground. This is used by the CycleTasks() function.
| EForwards |
Cycles the task list forwards, i.e. the foreground task is moved to background, bringing the next foremost task to the foreground. |
| EBackwards |
Cycles the list backwards, i.e. the task furthest from the foreground is brought to the foreground, pushing what was the foremost task to the next ordinal position. |
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