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C++ TPosition::Speed方法代码示例

本文整理汇总了C++中TPosition::Speed方法的典型用法代码示例。如果您正苦于以下问题:C++ TPosition::Speed方法的具体用法?C++ TPosition::Speed怎么用?C++ TPosition::Speed使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在TPosition的用法示例。


在下文中一共展示了TPosition::Speed方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: DeliverPositionerResults

void XQLocationPrivate::DeliverPositionerResults(TPositionSatelliteInfo aPositionInfo)
{
    TPosition pos; 
    aPositionInfo.GetPosition(pos);
    
    // Handle speed reporting
    float speed = 0;
    if (speedAvailable) {
        // Positioning module is able to offer speed information
        TCourse course;
        aPositionInfo.GetCourse(course);
        speed = course.Speed();
        if (isnan(speed)) {
            speed = 0;
        }
    } else {
        // Positioning module does not offer speed information
        // => Speed is calculated using position information & timestamps
        TTime posTime;
        TTimeIntervalSeconds interval;
        for (int i = iPositions.Count()-1 ; i >= 0; i--) {
            if (pos.Time().SecondsFrom(iPositions[i].Time(),interval) == KErrNone) {
                if (interval.Int() > 10) {
                    pos.Speed(iPositions[i], speed);
                    break;
                }
            }
        }
        while (iPositions.Count() > 0) {
            if (pos.Time().SecondsFrom(iPositions[0].Time(),interval) == KErrNone) {
                if (interval.Int() > 60) {
                    iPositions.Remove(0);
                } else {
                    break;
                }
            }
        }
        if (iPositions.Count() > 0) {
    	    if (pos.Time().SecondsFrom(iPositions[iPositions.Count()-1].Time(),interval) == KErrNone) {
                if (interval.Int() > 1) {
                    iPositions.Append(pos);
                }
        	}
        } else {
            iPositions.Append(pos);
        }
        // Accept speed from range 0.01 m/s (0.036 km/h) to 200 m/s (720 km/h)  
        if (speed < 0.01 || speed > 200) {
            speed = 0;
        }
    }
    if (speed != iPreviousSpeed) {
        emit ipParent->speedChanged(speed);
    }
    iPreviousSpeed = speed;
    
    // Handle satellite information reporting
    if (satelliteInfoAvailable) {
        if (aPositionInfo.NumSatellitesInView() != iPreviousNumSatellitesInView) {
            emit ipParent->numberOfSatellitesInViewChanged(aPositionInfo.NumSatellitesInView());
        }
        iPreviousNumSatellitesInView = aPositionInfo.NumSatellitesInView(); 

		if (aPositionInfo.NumSatellitesUsed() != iPreviousNumSatellitesUsed) { 
            emit ipParent->numberOfSatellitesUsedChanged(aPositionInfo.NumSatellitesUsed());
        }
        iPreviousNumSatellitesUsed = aPositionInfo.NumSatellitesUsed();
    }
    
    // Handle position information reporting
    if (iPreviousPosition.Latitude() != pos.Latitude() ||
        iPreviousPosition.Longitude() != pos.Longitude() ||
        iPreviousPosition.Altitude() != pos.Altitude()) {
        if (!isnan(pos.Latitude()) || !isnan(pos.Longitude()) || !isnan(pos.Altitude())) {
            emit ipParent->locationChanged(pos.Latitude(),pos.Longitude(),pos.Altitude(),speed);
        }
        
        if (iPreviousPosition.Latitude() != pos.Latitude()) {
            if (!isnan(pos.Latitude())) {
                emit ipParent->latitudeChanged(pos.Latitude(),pos.HorizontalAccuracy());
            }
        }
        if (iPreviousPosition.Longitude() != pos.Longitude()) {
            if (!isnan(pos.Longitude())) {
                emit ipParent->longitudeChanged(pos.Longitude(),pos.HorizontalAccuracy());
            }
        }
        if (iPreviousPosition.Altitude() != pos.Altitude()) {
            if (!isnan(pos.Altitude())) {
                emit ipParent->altitudeChanged(pos.Altitude(),pos.VerticalAccuracy());
            }
        }
    }
    iPreviousPosition = pos;
    
    if (iSingleUpdate) {
        stopUpdates();
        iSingleUpdate = EFalse;
    }
}
开发者ID:barkermn01,项目名称:phonegap-symbian.qt-creator,代码行数:100,代码来源:xqlocation_s60_p.cpp


注:本文中的TPosition::Speed方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。