我正在尝试创建一些将在 QML 地图上动态移动的标记。然而，在此之前，我需要使用鼠标将它们全部绘制在地图上，以便稍后更新它们。我一直在使用 pyqtProperty 将我需要的坐标发送到 QML，但是当我尝试将它们添加到 MapItemView 时，它们是未定义的。下面的代码演示了我希望完成的事情。问题是我将 pyqtProperty 从另一个未添加setContextProperty()like in 的python 对象传递给 QMLmain.py吗？还是我错误地使用了 MapItemView 委托？
main.qml
import QtQuick 2.7
import QtQml 2.5
import QtQuick.Controls 1.3
import QtQuick.Controls.Styles 1.3
import QtQuick.Window 2.2
import QtQuick.Layouts 1.2
import QtPositioning 5.9
import QtLocation 5.3
import QtQuick.Dialogs 1.1
ApplicationWindow {
id: root
width: 640
height: 480
visible: true
ListModel {
id: markers
}
Plugin {
id: mapPlugin
name: "osm" //"mapboxgl" "osm" "esri"
}
Map {
id: map
anchors.fill: parent
plugin: mapPlugin
center: atc.location
zoomLevel: 14
MapItemView {
model: markers
delegate: MapCircle {
radius: 50
color: 'red'
center: markLocation //issue here?
}
}
MapCircle {
id: home
center: atc.location
radius: 40
color: 'white'
}
MouseArea {
id: mousearea
anchors.fill: map
acceptedButtons: Qt.LeftButton | Qt.RightButton
hoverEnabled: true
property var coord: map.toCoordinate(Qt.point(mouseX, mouseY))
onDoubleClicked: {
if (mouse.button === Qt.LeftButton)
{
//Capture information for model here
atc.plot_mark(
"marker",
mousearea.coord.latitude,
mousearea.coord.longitude)
markers.append({
name: "markers",
markLocation: atc.get_marker_center("markers")
})
}
}
}
}
}
atc.py
import geocoder
from DC import DC
from PyQt5.QtPositioning import QGeoCoordinate
from PyQt5.QtCore import QObject, pyqtSignal, pyqtProperty, pyqtSlot
class ATC(QObject):
#pyqt Signals
locationChanged = pyqtSignal(QGeoCoordinate)
def __init__(self, parent=None):
super().__init__(parent)
self._location = QGeoCoordinate()
self.dcs = {}
g = geocoder.ip('me')
self.set_location(QGeoCoordinate(*g.latlng))
def set_location(self, coordinate):
if self._location != coordinate:
self._location = coordinate
self.locationChanged.emit(self._location)
def get_location(self):
return self._location
#pyqt Property
location = pyqtProperty(QGeoCoordinate,
fget=get_location,
fset=set_location,
notify=locationChanged)
@pyqtSlot(str, str, str)
def plot_mark(self, mark_name, lat, lng):
dc = DC(mark_name)
self.dcs[mark_name] = dc
self.dcs[mark_name].set_location(
QGeoCoordinate(float(lat), float(lng)))
@pyqtSlot(str)
def get_marker_center(self, mark_name):
return self.dcs[mark_name].location
DC.py
from PyQt5.QtPositioning import QGeoCoordinate
from PyQt5.QtCore import QObject, pyqtSignal, pyqtProperty, pyqtSlot
class DC(QObject):
#pyqt Signals
locationChanged = pyqtSignal(QGeoCoordinate)
def __init__(self, name, parent=None):
super().__init__(parent)
self.name = name
self._location = QGeoCoordinate()
def set_location(self, coordinate):
if self._location != coordinate:
self._location = coordinate
self.locationChanged.emit(self._location)
def get_location(self):
return self._location
#pyqt Property
location = pyqtProperty(QGeoCoordinate,
fget=get_location,
fset=set_location,
notify=locationChanged)
主文件
from PyQt5.QtGui import QGuiApplication
from PyQt5.QtQml import QQmlApplicationEngine
from PyQt5.QtCore import QObject, QUrl, pyqtSignal, pyqtProperty
from PyQt5.QtPositioning import QGeoCoordinate
from ATC import ATC
if __name__ == "__main__":
import os
import sys
app = QGuiApplication(sys.argv)
engine = QQmlApplicationEngine()
atc = ATC()
engine.rootContext().setContextProperty("atc", atc)
qml_path = os.path.join(os.path.dirname(__file__), "main.qml")
engine.load(QUrl.fromLocalFile(qml_path))
if not engine.rootObjects():
sys.exit(-1)
engine.quit.connect(app.quit)
sys.exit(app.exec_())