英文:
Placing a mapmarker by klick results in setting the marker on acorner of the map-window
问题
我想通过在地图上点击来设置标记。当我点击时，会设置一个标记。然而，标记被放置在地图的左下角。我做错了什么？
marker = MapMarker(lat=lat, lon=lon, source='custom_marker.png') # 添加这一行以指定标记图像
英文:
I want to set markers on the map by clicking on it. When I click a marker is set. However, the marker is placed on the left lower corner of the map. What am I doing wrong?
from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy_garden.mapview import MapMarker
Builder.load_string(
'''
#:import MapView kivy_garden.mapview.MapView
#:import MapMarker kivy_garden.mapview.MapMarker
<SimpleRec>
name: "simple_rec"
MDBoxLayout:
MapView:
id: smap
lat: 48
lon: 7.82
zoom: 11
on_touch_down: root.on_map_touch_down(self, *args)
'''
)
class SimpleRec(Screen):
def __init__(self, **kwargs):
super().__init__(**kwargs)
def on_map_touch_down(self, touch, *args):
lat, lon = self.ids.smap.get_latlon_at(*touch.pos)
print(str(lat) + " " + str(lon))
marker = MapMarker(lat=lat, lon=lon)
self.ids.smap.add_marker(marker)
class MainApp(MDApp):
def build(self):
screen_manager = ScreenManager()
simple_rec = SimpleRec(name='simple_rec')
screen_manager.add_widget(simple_rec)
return screen_manager
if __name__ == '__main__':
MainApp().run()
Surprisingly, when I extracted the necessary snippets out of my code the position where the markers are set changed from upper left to lower left corner.
答案1
得分: 0
你混淆了on_map_touch_down()方法的参数。为了纠正这个问题，请将：
on_touch_down: root.on_map_touch_down(self, *args)
改为：
on_touch_down: root.on_map_touch_down(*args)
self 参数不需要，因为它已经自动包含在 args 中。
然后，方法本身可以定义为：
def on_map_touch_down(self, mapview, touch):
英文:
You are confusing the arguments to your on_map_touch_down() method. To correct that problem, change:
on_touch_down: root.on_map_touch_down(self, *args)
to:
on_touch_down: root.on_map_touch_down(*args)
The self arg is not needed as it is automatically included in the args.
Then the method itself can be defined as:
def on_map_touch_down(self, mapview, touch):
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论