實現方法:
1、創建一個計時器,請將其打開
2、寫計時器活動對象的回調函數,在回調函數中刷新屏幕
實現代碼如下:
創建計時器活動對象並且打開定時器:
StartTimer();//打開定時器
打開定時器代碼:
2 {
3 iPeriodicTimer->Start( 1, 1000000,
4 TCallBack( CFirewallContainerState::Period, this ) );
5 }
6
回調函數Period()代碼:
2 {
3 ( static_cast<CFirewallContainerState*>( aPtr ) )->DoPeriodTask();
4 return ETrue;
5 }
6
DoPeriodTask()函數代碼:
2 {
3
4 for ( TInt count = 0;count < iPointSet.Count();count++ )
5 {
6 iPointSet[count]->iX += 4;
7 }
8 if(iPointSet.Count() > 100)
9 {
10 iPointSet.Reset() ;
11 }
12 TRect rect = Rect();
13 TInt y = GetRandY( rect.iBr.iY / 2 );
14 //設置曲線的Y值的最大值
15 TPoint* p = new(ELeave)TPoint(0,y);
16 iPointSet.Append(p);
17
18 // Update the screen
19 CWindowGc& gc = SystemGc();
20 gc.Activate( *DrawableWindow() );
21 UpdateDisplay();
22 gc.Deactivate();
23 }
24
刷屏函數UpdateDispaly()代碼:
{
CWindowGc& gc = SystemGc();
gc.Clear();
gc.SetPenStyle( CGraphicsContext::ENullPen );
gc.SetBrushColor( KRgbBlack );
gc.SetBrushStyle( CGraphicsContext::ESolidBrush );
TRect rect = TRect(Rect().iTl.iX, Rect().iTl.iY, Rect().iBr.iX, Rect().iBr.iY / 2);
gc.DrawRect(rect);
TSize PenSize(1,1);
gc.SetPenSize(PenSize);
gc.SetPenColor(KRgbGreen);
gc.SetPenStyle(CGraphicsContext::ESolidPen);
TInt RowCount = rect.iBr.iY / KRowWidth + 1;
TInt ColCount = rect.iBr.iX / KColWidth + 1;
//畫橫線
for(TInt count = 0; count < RowCount; count++)
{
TPoint p1(0,count*KRowWidth);
TPoint p2(rect.iBr.iX,count*KRowWidth);
gc.DrawLine(p1,p2);
}
//畫最下面的橫線
TPoint pBl(rect.iTl.iX,rect.iBr.iY);
TPoint pBr(rect.iBr.iX,rect.iBr.iY);
gc.DrawLine(pBl,pBr);
//畫豎線
for(TInt count = 0; count < ColCount; count++)
{
TPoint p1(count*KColWidth,0);
TPoint p2(count*KColWidth,rect.iBr.iY);
gc.DrawLine(p1,p2);
}
//畫右邊的豎線
TPoint pTr(rect.iBr.iX, rect.iTl.iY);
gc.DrawLine(pTr, pBr);
//畫曲線
gc.SetPenColor(KRgbYellow);
TInt count ;
for(count=0;count < iPointSet.Count()-1;count++)
{
gc.DrawLine(*iPointSet[count],*iPointSet[count+1]);
if (iPointSet.Count() == 100) count = 0 ;
}
//顯示狀態信息
//顯示當前流量信息
gc.SetPenColor(KRgbBlack);
gc.UseFont( iCoeEnv->NormalFont() );
gc.SetPenColor(KRgbBlack);
TName msgCurrStorm ;
CEikonEnv::Static()->ReadResource(msgCurrStorm , R_STR_MSG_STATE_CURRENT_FLOW );
if (iPointSet.Count() > 0)
{
msgCurrStorm.AppendNum(Rect().iBr.iY / 2 - iPointSet[count]->iY) ;
msgCurrStorm.Append(_L(" KB")) ;
}
//將當前點的縱座標作爲模擬流量值顯示
gc.DrawText( msgCurrStorm, TPoint(Rect().iTl.iX + 10,Rect().iBr.iY / 2 + 30)) ;
//判斷是否設置了實時監控功能
TName msgRealtime ;
if (iUi->iSettingData->iIsRealtime)
{
CEikonEnv::Static()->ReadResource(msgRealtime , R_STR_MSG_STATE_REALTIME_ON );
}
else
{
CEikonEnv::Static()->ReadResource(msgRealtime , R_STR_MSG_STATE_REALTIME_OFF );
}
gc.DrawText( msgRealtime, TPoint(Rect().iTl.iX + 10,Rect().iBr.iY / 2 + 60)) ;
//無規則匹配時,默認的動作
TName msgDefaultaction ;
// gc.UseFont( iCoeEnv->NormalFont() );
switch (iUi->iSettingData->iDefaultAction)
{
case 0:
CEikonEnv::Static()->ReadResource(msgDefaultaction , R_STR_MSG_STATE_DEFAULTACTION_0 );
break ;
case 1:
CEikonEnv::Static()->ReadResource(msgDefaultaction , R_STR_MSG_STATE_DEFAULTACTION_1 );
break ;
case 2:
CEikonEnv::Static()->ReadResource(msgDefaultaction , R_STR_MSG_STATE_DEFAULTACTION_2 );
break ;
default:
break ;
}
gc.DrawText( msgDefaultaction, TPoint(Rect().iTl.iX + 10,Rect().iBr.iY / 2 + 90)) ;
}