From Forum Nokia Wiki

ID	CS000990	Creation date	May 28, 2008
Platform	S60 3rd Edition, FP1	Tested on devices	Nokia N93
Category	Symbian C++	Subcategory	Files/Data

Keywords (APIs, classes, methods, functions): RScheduler, TSchedulerItemRef, TScheduleEntryInfo2, TTaskSchedulerCondition, TTaskInfo, TTsTime, TScheduleState2, RScheduler::Connect(), RScheduler::Register(), RScheduler::Close(), RScheduler::GetScheduleRefsL(), RScheduler::GetScheduleL()

Overview

This code snippet implements three simple helper methods to get a count of schedules, scheduled condition-based tasks, and scheduled time-based tasks. The RScheduler method GetScheduleRefsL() is used to get the count of schedules. The filter parameter of this method can be used to include all schedules (EAllSchedules) or only pending (EPendingSchedules) schedules to count.

The RScheduler method GetScheduleL() is used to get task count of the schedule by a given ID. This example implements separate methods for time-based and condition-based schedules. All these helper methods return -1 in error situations.

This snippet can be self-signed.

MMP file

The following libraries are required:

LIBRARY             schsvr.lib

Preconditions

ExampleTaskHandler.exe must be created and time-based and condition-based schedules with example tasks must be scheduled before this code snippet can be executed. See code snippets CS000986 - Creating and registering a task handler with RScheduler, CS000987 - Creating persistent and transient schedules with RScheduler, and CS000988 - Creating a condition-based schedule with RScheduler for more information.

Resource files

.rss

RESOURCE MENU_PANE r_schedulerexample_menu
    {
    items = 
        {
         //...
        MENU_ITEM {command = EGetCountExample;         txt = "GetCountExample";},
        //...
        MENU_ITEM {command = EAknSoftkeyExit;          txt = "Exit";}
        };
    }

.hrh

enum TSchedulerExampleIds
    {
   //...
    EGetCountExample,
   //...
    };

Header file

#ifndef __SCHEDULEREXAMPLEAPPUI_H__
#define __SCHEDULEREXAMPLEAPPUI_H__
 
#include <csch_cli.h> // RScheduler
#include <schinfo.h>  // TSchedulerItemRef, TTaskInfo... 
 
class CSchedulerExampleAppUi : public CAknAppUi
    {
    //...
public:    
    void HandleCommandL(TInt aCommand);
    //...
private:        
    TInt GetConditionBasedScheduleTaskCountL(RScheduler& aScheduler, 
                                             TInt aScheduleId, 
                                             TInt& aTaskCount);   
    
    TInt GetTimeBasedScheduleTaskCountL(RScheduler& aScheduler, 
                                        TInt aScheduleId, 
                                        TInt& aTaskCount);    
    
    TInt GetScheduleCountL(TScheduleFilter aFilter, 
                            RScheduler& aScheduler, 
                            TInt& aScheduleCount);
    //...    
private:
 
    RScheduler iScheduler;
    
    TSchedulerItemRef iPersistentScheduleHandle;
    TSchedulerItemRef iConditionScheduleHandle;    
    };
    
#endif // __SCHEDULEREXAMPLEAPPUI_H__

Source file

void CSchedulerExampleAppUi::ConstructL()
    {
    //...
    User::LeaveIfError(iScheduler.Connect());
    
    _LIT(KExampleTaskHandlerExe, "ExampleTaskHandler.exe");
    TFileName exampleHandler(KExampleTaskHandlerExe);
        
    User::LeaveIfError(iScheduler.Register(exampleHandler, CActive::EPriorityStandard));    
    }
    
CSchedulerExampleAppUi::~CSchedulerExampleAppUi()
    {
 
    //...    
    iScheduler.Close(); 
    }    
 
void CSchedulerExampleAppUi::HandleCommandL(TInt aCommand)
  {
  TBuf<100> Text1; //first line of dialog text 
  TBuf<100> Text2; //second line of dialog text
      
  switch(aCommand)
    {
    case EEikCmdExit:
    case EAknSoftkeyExit:
      Exit();
      break;
//...
    case EGetCountExample:
      {
      TInt err(KErrNone);          
      TInt scheduleCount=-1;
      TInt timeBasedScheduleTaskCount=-1;
      TInt conditionBasedScheduleTaskCount=-1;
                      
      err = GetScheduleCountL(EAllSchedules, iScheduler, scheduleCount);
                                 
      err = GetTimeBasedScheduleTaskCountL(iScheduler, 
    iPersistentScheduleHandle.iHandle, timeBasedScheduleTaskCount );
            
      err = GetConditionBasedScheduleTaskCountL(iScheduler,
 iConditionScheduleHandle.iHandle, conditionBasedScheduleTaskCount );
    
      Text1.Append(_L("ScheduleCount:"));
      Text1.AppendNum(scheduleCount);
                    
      Text2.Append(_L("TimeBasedScheduleTaskCount:"));
      Text2.AppendNum(timeBasedScheduleTaskCount);
      Text2.Append(_L("\nConditionBasedScheduleTaskCount:"));
      Text2.AppendNum(conditionBasedScheduleTaskCount);
              
      CEikonEnv::Static()->InfoWinL(Text1, Text2);
      }
      break;
      
   default:
     //Panic(ESchedulerExampleUi);
     break;
     }
  }  
    
 
TInt CSchedulerExampleAppUi::GetConditionBasedScheduleTaskCountL(RScheduler& aScheduler,
                               TInt aScheduleId, 
                               TInt& aTaskCount)  
  {
  TInt ret(KErrNone);
  
  CArrayFixFlat<TTaskInfo>* tasks = 
new (ELeave) CArrayFixFlat<TTaskInfo>(1);
  CleanupStack::PushL(tasks);
 
  TTsTime time;
  TScheduleState2 state;
   CArrayFixFlat<TTaskSchedulerCondition>* conditions = 
new (ELeave) CArrayFixFlat<TTaskSchedulerCondition>(1);        
  CleanupStack::PushL(conditions);
    
  tasks->Reset();
  ret = aScheduler.GetScheduleL(aScheduleId, 
                  state, 
                 *conditions, 
                 time,
                *tasks);
  CleanupStack::PopAndDestroy(conditions);
  
  if(ret == KErrNone)
    aTaskCount = tasks->Count();
  else
    aTaskCount = -1;
 
  CleanupStack::PopAndDestroy(tasks);
  
  return ret;
  }
 
 
TInt CSchedulerExampleAppUi::GetTimeBasedScheduleTaskCountL(RScheduler& aScheduler, 
                               TInt aScheduleId, 
                               TInt& aTaskCount)  
  {
  TInt ret(KErrNone);
 
  CArrayFixFlat<TTaskInfo>* tasks = new (ELeave) CArrayFixFlat<TTaskInfo>(1);
  CleanupStack::PushL(tasks);
  
  TTsTime time;
  TScheduleState2 state;
  CArrayFixFlat<TScheduleEntryInfo2>* entries = 
new (ELeave) CArrayFixFlat<TScheduleEntryInfo2>(1);
  CleanupStack::PushL(entries);
    
  tasks->Reset();
  ret = aScheduler.GetScheduleL(aScheduleId, 
                  state, 
                  *entries, 
                  *tasks, 
                  time);
  
  CleanupStack::PopAndDestroy(entries);
  
  if(ret == KErrNone)
    aTaskCount = tasks->Count();
  else
    aTaskCount = -1;
  
  CleanupStack::PopAndDestroy(tasks);
  
  return ret;
  }
 
 
TInt CSchedulerExampleAppUi::GetScheduleCountL(TScheduleFilter aFilter, 
                              RScheduler& aScheduler, 
                              TInt& aScheduleCount)
  {
  TInt ret(KErrNone); 
  
  CArrayFixFlat<TSchedulerItemRef>* items = 
new (ELeave) CArrayFixFlat<TSchedulerItemRef> (1);
  CleanupStack::PushL(items);
 
  ret = aScheduler.GetScheduleRefsL(*items, aFilter);
 
  if(ret == KErrNone)
    aScheduleCount = items->Count();
  else
    aScheduleCount = -1;
  
  CleanupStack::PopAndDestroy(items);
  
  return ret;
  }

Postconditions

The count of schedules, time-based schedule tasks, and condition-based schedule tasks are displayed to the user with info dialogs.

See also

• CS000986 - Creating and registering a task handler with RScheduler
• CS000987 - Creating persistent and transient schedules with RScheduler
• CS000988 - Creating a condition-based schedule with RScheduler
• CS000989 - Getting schedule and task info using RScheduler
• CS000991 - Editing a schedule using RScheduler
• CS000992 - Deleting schedules and tasks using RScheduler