如何使用屏幕管理器将 kivy.garden.mapview 添加到 kivy 应用程序中的屏幕

Question

我基本上是在尝试将 kivy.garden.mapview 作为小部件添加到 kivy 应用程序中。

我就是这样尝试的。

我还添加了 Painter class，因为如果我将 Painter 用作小部件，它会完美地工作，但 Map class 不会。另外 Map 如果作为应用程序进行测试并取消注释 return mapview 工作得很好。

from kivy.app import App
# kivy.require("1.10.1")
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.garden.mapview import MapView,MapMarker

from kivy.uix.widget import Widget
from kivy.graphics import Line

xList = [3.2,4]
yList = [2.3,3]

class Map(Widget):
    def on_touch_down(self, touch):
        global xList
        global yList
        mapview = MapView(zoom=1, lat=67, lon=42)
        m1 = MapMarker(lat=67, lon=42)
        mapview.add_marker(m1)
        print(xList)
        print(yList)
        for i in range(len(xList)):
            m=MapMarker(lat=xList[i],lon=yList[i])
            mapview.add_marker(m)
        # return mapview


class Painter(Widget):

    def on_touch_down(self, touch):
        with self.canvas:
            touch.ud["line"] = Line(points=(touch.x, touch.y))

    def on_touch_move(self, touch):
        touch.ud["line"].points += [touch.x, touch.y]


class MainScreen(Screen):
    pass


class AnotherScreen(Screen):
    pass


class ScreenManagement(ScreenManager):
    pass


presentation = Builder.load_file("SimpleKivy.kv")


class MainApp(App):

    def build(self):
        return presentation


if __name__ == "__main__":
    MainApp().run()

kivy文件是

#: import FadeTransition kivy.uix.screenmanager.FadeTransition

ScreenManagement:
    transition: FadeTransition()
    MainScreen:
    AnotherScreen:

<MainScreen>:
    name: "main"
    Button:
        on_release: app.root.current = "Map"
        text: "Map"
        font_size: 8
        size_hint:0.05,0.05
        pos_hint: {"right":1,"top":1}
        color: 0,1,0,1

<AnotherScreen>:
    name: "Map"

    FloatLayout:
        Map
        Button:
            color: 0,1,0,1
            font_size: 8
            size_hint: 0.05,0.05
            text: "Graph"
            on_release: app.root.current = "main"
            pos_hint: {"right":1, "top":1}

那我应该怎么做呢？

我可以不把地图做成小部件吗？

我需要一个图表，所以我至少需要有 2 个屏幕。

Answer 1

您实际上还没有将 MapView 添加到您的 App。您在 Map 小部件中引用了它，但从未将其添加到 App。一种方法是将 Map 更改为扩展 MapView.:

class Map(MapView):
    def on_touch_down(self, touch):
        global xList
        global yList
        m1 = MapMarker(lat=67, lon=42)
        self.add_marker(m1)
        print(xList)
        print(yList)
        for i in range(len(xList)):
            m=MapMarker(lat=xList[i],lon=yList[i])
            self.add_marker(m)

然后在您的 kv 文件中，添加 Map 的初始设置：

    Map:
        zoom: 1
        lat: 67
        lon: 42

Answer 2

使用 POPUP

class mappopup(RelativeLayout):
    def get(self):
        x=self.ids.latitude.text
        print(x)
        print(self.ids.longitude.text)

def openmap(self):
        popup = Popup(content=mappopup())
        popup.open()

<mappopup>:
    MapView:
        id: mapview
        lat: 20.9517
        lon: 85.0985
        zoom: 8

        MapMarker:
            lat: mapvie w.lat
            lon: mapview.lon

    Toolbar:
        Label:
            id: latitude
            text: "Longitude: {}".format(mapview.lon)
        Label:
            id: longitude
            text: "Latitude: {}".format(mapview.lat)
        Button:
            text:"OK"
            on_release:root.get()

如何使用屏幕管理器将 kivy.garden.mapview 添加到 kivy 应用程序中的屏幕

How to add kivy.garden.mapview to a screen in a kivy app using screen manager

python

kivy

kivy-language