如何更改kivy Graph的背景颜色？

Question

在Kivy中是否存在类似下面的属性改变Graph背景颜色的方法？

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。 Kivy Garden Graph 确实存在 background_color 属性，如下所示。

例子

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()

如何更改kivy Graph的背景颜色？

How to change the background color of a kivy Graph?

python

kivy

kivy-language

例子

main.py

输出