MeVisLabToolboxReference
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abstract interface to observe the BackgroundTaskManager More...
#include <mlBackgroundTaskManager.h>
Public Member Functions | |
virtual | ~Observer () |
virtual destructor | |
virtual void | taskAdded (BackgroundTask *task)=0 |
called when a task was added (but is not yet started) | |
virtual void | taskRemoved (BackgroundTask *task)=0 |
called when a task was removed (either finished or canceled or not even started) | |
virtual void | taskStatusUpdated ()=0 |
called in regular intervals if there are running tasks and if the tasks change status |
abstract interface to observe the BackgroundTaskManager
The BackgroundTaskManager guarantees that the Observer is only called from within the GUI thread and that the given task is not changed while taskAdded/taskRemoved is called.
Definition at line 101 of file mlBackgroundTaskManager.h.
virtual ml::BackgroundTaskManager::Observer::~Observer | ( | ) | [inline, virtual] |
virtual destructor
Definition at line 105 of file mlBackgroundTaskManager.h.
virtual void ml::BackgroundTaskManager::Observer::taskAdded | ( | BackgroundTask * | task | ) | [pure virtual] |
called when a task was added (but is not yet started)
virtual void ml::BackgroundTaskManager::Observer::taskRemoved | ( | BackgroundTask * | task | ) | [pure virtual] |
called when a task was removed (either finished or canceled or not even started)
virtual void ml::BackgroundTaskManager::Observer::taskStatusUpdated | ( | ) | [pure virtual] |
called in regular intervals if there are running tasks and if the tasks change status
You should use this as an indication to schedule an update to the user interface if you want to show the tasklist progress. Do NOT do expensive operation in taskStatusUpdated(), since it is called for each message a task sends to the GUI.