如何更改Kivy Graph的背景颜色？

Question

是否存在与下面的属性类似的属性，用于更改Kivy中Graph的背景颜色？

test.kv

Graph:
    id: my_graph_id
    border_color = (0,0,0,0) # this is valid
    background_color = (0,0,0,0) # ?? this does not exist

Answer 1

在Python代码中使用graph.background_color。基维花园图确实存在属性 background_color ，如下所示。

示例

main.py

from math import sin
from kivy.garden.graph import Graph, MeshLinePlot
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout


class RootWidget(BoxLayout):

    def __init__(self, **kwargs):
        super(RootWidget, self).__init__(**kwargs)

        graph = Graph(xlabel='X', ylabel='Y', x_ticks_minor=5, x_ticks_major=25, y_ticks_major=1,
                      y_grid_label=True, x_grid_label=True, padding=5,
                      x_grid=True, y_grid=True, xmin=-0, xmax=100, ymin=-1, ymax=1)

        graph.background_color = 0, 0, 1, 1    # blue color

        plot = MeshLinePlot(color=[1, 0, 0, 1])
        plot.points = [(x, sin(x / 10.)) for x in range(0, 101)]
        graph.add_plot(plot)
        self.add_widget(graph)


class GraphDemo(App):
    title = "Kivy Garden Graph - background_color"

    def build(self):
        return RootWidget()


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

输出