qt - 将鼠标悬停在地图上时突出显示国家/地区
问题描述
当我将鼠标悬停在该国家/地区时，我想突出显示该国家/地区。为此，我将 QStandardItemModel 与所需国家的多边形一起使用。问题是 onClicked 事件按预期工作，但 onEntered 和 onExited 在矩形中触发，在极端坐标处，而不是在多边形中。onEntered 和 onExited 是否可以与 onClicked 在同一区域工作？也许还有其他突出国家/地区的解决方案？我查看了 MaskedMouseArea，但作为资源，您需要设置 QImage。提前感谢您的帮助。
主文件
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QGeoPolygon>
#include <QStandardItem>
#include <QQmlContext>
class PolygonItem: public QStandardItem
{
public:
PolygonItem(QString Name, const QGeoPolygon &polygon);
QString Name() const;
QGeoPolygon polygon() const;
};
class PolygonItemModel: public QStandardItemModel{
public:
PolygonItemModel(QObject *parent=nullptr);
void addPolygonItem(PolygonItem *item);
};
enum PolygonRole{
NameRole,
GeopolygonRole,
};
PolygonItem::PolygonItem(QString name, const QGeoPolygon &polygon):
QStandardItem()
{
setData(name, NameRole);
setData(QVariant::fromValue(polygon), GeopolygonRole);
}
PolygonItemModel::PolygonItemModel(QObject *parent):
QStandardItemModel(parent)
{
setItemRoleNames({{NameRole, "name"},
{GeopolygonRole, "polygon"}});
}
void PolygonItemModel::addPolygonItem(PolygonItem *item)
{
appendRow(item);
}
const std::vector<std::pair<double, double>> Namibia =
{
{
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{14.83207321166992188,-24.99943923950195312},
{14.467498779296875,-23.15513992309570312},
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{14.66805458068847656,-22.98416900634765625},
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{14.6659698486328125,-22.63843727111816406},
{14.64430522918701172,-22.63916778564453125},
{14.53888702392578125,-22.6833343505859375},
{14.52484512329101562,-22.69206619262695312}
}
};
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
PolygonItemModel model;
engine.rootContext()->setContextProperty("polygonmodel", &model);
const QUrl url(QStringLiteral("qrc:/main.qml"));
engine.load(url);
QGeoPolygon polygon;
for (int i = 0; i < Namibia.size(); i++)
{
polygon.addCoordinate(QGeoCoordinate(Namibia[i].second, Namibia[i].first));
}
PolygonItem *item = new PolygonItem("Namibia", polygon);
model.addPolygonItem(item);
return app.exec();
}
qml
Window {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
Map {
id: map
anchors.fill: parent
center: QtPositioning.coordinate(45.137451890638886, -68.13734351262877)
plugin: Plugin {
name: "osm"
}
zoomLevel: 1
MapItemView{
model: polygonmodel
delegate: MapPolygon {
color: "blue"
border.color: "green"
border.width: 1
smooth: true
opacity: 0.25
geoShape: model.polygon
MouseArea{
anchors.fill: parent
hoverEnabled : true
onEntered:
{
border.color = "red"
border.width =3
}
onExited:
{
border.color = "white"
border.width = 1
}
onClicked:
{
console.log("onClicked:")
}
}
}
}
}
}
解决方案
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