PIE-SDK For C++屏幕坐标和地图坐标转换

第一步

实例化point对象

第二步

调用ToMapPoint()或FromMapPoint()方法对设备点坐标和地图坐标经进行转化

接口/类

方法

说明

SysDisplay::DisplayTransformationPtr

ToMapPoint

将屏幕坐标转换为地图坐标

FromMapPoint

从地图坐标转换为设备坐标

FromPagePoint

将页面点转换为设备点

项目路径

百度云盘地址下/PIE示例程序/02.地图操作/06.地图鼠标事件监听

数据路径

百度云盘地址下/PIE示例数据/栅格数据/04.World/World.tif

视频路径

百度云盘地址下/PIE视频教程/02.地图操作/05.屏幕和地图坐标转换.avi

示例代码

 1、以下代码为bool PIEMainWindow::eventFilter(QObject *obj, QEvent *ev)方法下的部分代码片段

else if (ev->type()==QEvent::MouseButtonPress)

        {    

            QMouseEvent *pMouseEvent = static_cast<QMouseEvent*>(ev);

            QPoint qPoint;

            qPoint.setX(pMouseEvent->x());

            qPoint.setY(pMouseEvent->y());

            SysGeometry::PointPtr point = new SysGeometry::Point();

            point = m_pMapControl->GetActiveView()->GetDisplayTransformation()->ToMapPoint(qPoint);

            QString screenPoint = QString("屏幕坐标：%1,%2").arg(pMouseEvent->x()).arg(pMouseEvent->y());

            QString mapPoint= QString("地理坐标：%1,%2").arg(point->GetX()).arg(point->GetY());

            QString info = screenPoint + "\r\n" + mapPoint;

            QMessageBox::information(this, "屏幕坐标转换地图坐标", info, QMessageBox::Ok);

            //地图坐标转换屏幕坐标

            QPoint tempPoint=m_pMapControl->GetActiveView()->GetDisplayTransformation()->FromMapPoint(point);

            QString tempPointStr = QString("屏幕坐标：%1,%2").arg(tempPoint.x()).arg(tempPoint.y());

            info = mapPoint + "\r\n" + tempPointStr;

            QMessageBox::information(this, "地图坐标转换屏幕坐标", info, QMessageBox::Ok);

        }