kivy花园mapview方法绘制行程

Question

我是kivy 的新手，在Mapview 想像googlemap 一样显示路线。

我想要与这张照片相似的结果：

在 mapview 方法中搜索，它没有提供类似的东西。

我尝试创建多个像这样的标记：

        MapView:
            id: mapview
            lat: 36.77418821888212
            lon: 3.052954737671183
            zoom: 12
            on_zoom:
                self.zoom = 12 if self.zoom < 12 else self.zoom

            MapMarkerPopup:#ljama3 lakbir
                
                lat: 36.7571627
                lon: 2.9946709

            MapMarkerPopup:#ljama3 lakbir
                source:"Resources/ptn (2).png"
                lat: 36.735850
                lon: 3.138329
                popup_size: 400,320
            MapMarkerPopup:#ljama3 lakbir
                source:"Resources/ptn (2).png"
                lat: 36.735900
                lon: 3.138329
                popup_size: 400,320
            MapMarkerPopup:#ljama3 lakbir
                source:"Resources/ptn (2).png"
                lat: 36.735950
                lon: 3.138329
                popup_size: 400,320
            MapMarkerPopup:#ljama3 lakbir
                source:"Resources/ptn (2).png"
                lat: 36.736000
                lon: 3.138329
                popup_size: 400,320
            MapMarkerPopup:#ljama3 lakbir
                source:"Resources/ptn (2).png"
                lat: 36.736050
                lon: 3.138329
                popup_size: 400,320
            MapMarkerPopup:#ljama3 lakbir
                source:"Resources/ptn (2).png"
                lat: 36.736100
                lon: 3.138329
                popup_size: 400,320

            MapMarkerPopup:#ljama3 lakbir
                source:"source/marker.png"
                lat: 36.735848
                lon: 3.138329
                popup_size: 400,320

但当我zoom IN 时，它看起来不像一条线，而是彼此相邻

所以我的问题是有什么可能的解决方案！

Answer 1

您可以像在任何其他Widget 上一样在MapView 上画线。通过扩展MapView，你可以画出这样的线条：

from kivy.graphics.context_instructions import Color
from kivy.graphics.instructions import InstructionGroup
from kivy.graphics.vertex_instructions import Line
from kivy.properties import ObjectProperty

from kivy.garden.mapview import MapView, MapMarker
from kivy.app import App
from kivy.lang import Builder

kv = '''
FloatLayout:
    MyMapView:
        m1: marker1
        m2: marker2
        size_hint: 1, 0.9
        pos_hint: {'y':0.1}
        zoom: 15
        lat: 36.77418821888212
        lon: 3.052954737671183
        double_tap_zoom: True
        MapMarker:
            id: marker1
            lat: 36.77418821888212
            lon: 3.052954737671183
            on_release: app.marker_released(self)
        MapMarker:
            id: marker2
            lat:  36.77
            lon: 3.06
            on_release: app.marker_released(self)
            
    Button:
        size_hint: 0.1, 0.1
        text: 'info'
        on_release: app.info()
'''

class MyMapView(MapView):
    grp = ObjectProperty(None)

    def do_update(self, dt):  # this over-rides the do_update() method of MapView
        super(MyMapView, self).do_update(dt)
        self.draw_lines()

    # draw the lines
    def draw_lines(self):
        points = [[self.m1.center_x, self.m1.y], [self.m2.center_x, self.m2.y]]  # get the points for the lines from somewhere
        lines = Line()
        lines.points = points
        lines.width = 2
        if self.grp is not None:
            # just update the group with updated lines lines
            self.grp.clear()
            self.grp.add(lines)
        else:
            with self.canvas.after:
                #  create the group and add the lines
                Color(1,0,0,1)  # line color
                self.grp = InstructionGroup()
                self.grp.add(lines)


class MapViewApp(App):
    def build(self):
        return Builder.load_string(kv)

    def info(self, *args):
        print(self.root.ids.marker1)
        print(self.root.ids.marker2)

    def marker_released(self, marker):
        print(marker)

MapViewApp().run()