Qt实现的百度在线地图与离线地图（利用QWebEngine实现）

#include "MyMainWindow.h" #include <QCoreApplication> #include <QDebug> MyMainWindow::MyMainWindow(QWidget *parent) : QWidget(parent) { this->resize(1200, 660); this->setWindowTitle(tr("MyWebEngineView")); mWebView = new QWebEngineView(this); mWebView->setFixedSize(960, 660); mWebView->setContentsMargins(0,0,0,0); mWebPage = new QWebEnginePage(this); // 定义一个page作为页面管理 mWebChannel = new QWebChannel(this); // 定义一个channel作为和JS或HTML交互 mWebChannel->registerObject("interactObj", this); // 注册Qt对象 mWebPage->setWebChannel(mWebChannel); // 把channel配置到page上，让channel作为其信使 mWebView->setPage(mWebPage); // 建立page和UI上的webEngine的联系 lab_Position = new QLabel(mWebView); lab_Position->setFixedSize(300, 30); lab_Position->setAlignment(Qt::AlignRight); lab_Position->move(660, 630); mNetWorkComboBox = new QComboBox(this); mNetWorkComboBox->setFixedSize(200, 40); mNetWorkComboBox->addItem(tr("在线地图"), 0); mNetWorkComboBox->addItem(tr("离线地图"), 1); mNetWorkComboBox->setStyleSheet("QComboBox{combobox-popup:0;}"); QObject::connect(mNetWorkComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotNetWorkIndexChanged(int))); mMapTypeComboBox = new QComboBox(this); mMapTypeComboBox->setFixedSize(200, 40); mMapTypeComboBox->addItem(tr("街道地图"), 0); mMapTypeComboBox->addItem(tr("卫星地图"), 1); mMapTypeComboBox->setStyleSheet("QComboBox{combobox-popup:0;}"); QObject::connect(mMapTypeComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotMapTypeIndexChanged(int))); lab_Long = new QLabel(this); lab_Long->setFixedSize(40, 40); lab_Long->setText(tr("经度:")); lab_Lat = new QLabel(this); lab_Lat->setFixedSize(40, 40); lab_Lat->setText(tr("纬度:")); lineEdit_Longitude = new QLineEdit(this); lineEdit_Longitude->setFixedSize(140, 40); lineEdit_Longitude->setText(tr("116.468278")); lineEdit_Latitude = new QLineEdit(this); lineEdit_Latitude->setFixedSize(140, 40); lineEdit_Latitude->setText(tr("39.922965")); btn_Search = new QPushButton(this); btn_Search->setFixedSize(200, 40); btn_Search->setText(tr("查询坐标")); QObject::connect(btn_Search, SIGNAL(clicked()), this, SLOT(onbtnSearchclicked())); btn_AddPoint = new QPushButton(this); btn_AddPoint->setFixedSize(200, 40); btn_AddPoint->setText(tr("添加坐标")); QObject::connect(btn_AddPoint, SIGNAL(clicked()), this, SLOT(onbtnAddPointclicked())); mLeftLayout = new QVBoxLayout(); mLeftLayout->addWidget(mWebView); mLeftLayout->setSpacing(0); mLeftLayout->setMargin(0); mRightLayout = new QGridLayout(); mRightLayout->addWidget(mNetWorkComboBox, 0, 0, 1, 0); mRightLayout->addWidget(mMapTypeComboBox, 1, 0, 1, 0); mRightLayout->addWidget(lab_Long, 2, 0); mRightLayout->addWidget(lab_Lat, 3, 0); mRightLayout->addWidget(lineEdit_Longitude, 2, 1); mRightLayout->addWidget(lineEdit_Latitude, 3, 1); mRightLayout->addWidget(btn_Search, 4, 0, 1, 0); mRightLayout->addWidget(btn_AddPoint, 5, 0, 1, 0); mRightLayout->setRowStretch(6, 1); mRightLayout->setSpacing(20); mRightLayout->setMargin(20); mMainLayout = new QHBoxLayout(this); mMainLayout->addLayout(mLeftLayout); mMainLayout->addLayout(mRightLayout); mMainLayout->setSpacing(0); mMainLayout->setMargin(0); slotNetWorkIndexChanged(0); slotMapTypeIndexChanged(0); } MyMainWindow::~MyMainWindow() { } void MyMainWindow::onbtnSearchclicked() { QString strLongitude = lineEdit_Longitude->text(); QString strLatitude = lineEdit_Latitude->text(); setCoordinate(strLongitude, strLatitude); } void MyMainWindow::onbtnAddPointclicked() { QString strLongitude = lineEdit_Longitude->text(); QString strLatitude = lineEdit_Latitude->text(); addCoordinate(strLongitude, strLatitude); } void MyMainWindow::slotNetWorkIndexChanged(int id) { QString strMapPath = "file:///" + QCoreApplication::applicationDirPath(); switch (id) { case 0: strMapPath += "/BaiduOnline/BaiduOnlineMap.html"; mWebPage->load(QUrl(strMapPath)); qDebug() << "online map"; break; case 1: strMapPath += "/BaiduOffline/BaiduOfflineMap.html"; mWebPage->load(QUrl(strMapPath)); qDebug() << "offline map"; break; default: break; } mMapTypeComboBox->setCurrentIndex(0); } void MyMainWindow::slotMapTypeIndexChanged(int id) { switch (id) { case 0: mWebView->page()->runJavaScript(QString("showStreetMap()")); break; case 1: mWebView->page()->runJavaScript(QString("showSatelliteMap()")); break; default: break; } } void MyMainWindow::getCoordinate(QString lon, QString lat) { lab_Position->setText(tr("经度:%1° 纬度:%2°").arg(lon).arg(lat)); } void MyMainWindow::setCoordinate(QString lon,QString lat) { QString strMessage = QString("showAddress(\"%1\",\"%2\")").arg(lon).arg(lat); mWebView->page()->runJavaScript(strMessage); } void MyMainWindow::addCoordinate(QString lon, QString lat) { QString strMessage = QString("addAddress(\"%1\",\"%2\")").arg(lon).arg(lat); mWebView->page()->runJavaScript(strMessage); } void MyMainWindow::showInfoWindow(QString lon, QString lat) { QMessageBox::information(this, tr("坐标信息"), tr("经度:%1° 纬度:%2°").arg(lon).arg(lat)); }