标题:qwt应用
作者:1234567897
日期:2015-03-12 19:54
内容:
qwt下的例子里面cpuplot是怎样实现x轴范围实时更新的。光是代码看不懂啊。
#1 [duang 03-13 10:36]
把看不懂的代码贴上来
#2 [duang 03-17 13:06]
void CpuPlot::timerEvent( QTimerEvent * )
{
for ( int i = dataCount; i > 0; i-- )
{
for ( int c = 0; c < NCpuData; c++ )
{
if ( i < HISTORY )
data[c].data = data[c].data[i-1];
}
}
cpuStat.statistic( data[User].data[0], data[System].data[0] );
data[Total].data[0] = data[User].data[0] + data[System].data[0];
data[Idle].data[0] = 100.0 - data[Total].data[0];
if ( dataCount < HISTORY )
dataCount++;
for ( int j = 0; j < HISTORY; j++ )
timeData[j]++;
setAxisScale( QwtPlot::xBottom,
timeData[HISTORY - 1], timeData[0] );
for ( int c = 0; c < NCpuData; c++ )
{
data[c].curve->setRawSamples(
timeData, data[c].data, dataCount );
}
replot();