我正在为桌面创建Kivy应用。我已经创建了大多数应用程序,但是我想向应用程序添加背景图像。我没有使用KV语言,而是仅使用Python代码创建了所有小部件。谁能帮助我使用Python在kivy应用中添加背景图片。
您可以使用with canvas:
绘制背景图像。这是一个简单的示例:
from kivy.app import App
from kivy.clock import Clock
from kivy.graphics.vertex_instructions import Rectangle
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
class TestApp(App):
def build(self):
theRoot = FloatLayout()
# draw the background
with theRoot.canvas:
self.rect = Rectangle(source='background.png')
# use binding to insure that the background stay matched to theRoot
theRoot.bind(on_size=self.update)
theRoot.add_widget(Label(text="Hi", size_hint=(None, None), size=(100, 50), pos=(100,100)))
# need to call update() to get background sized correctly at start
Clock.schedule_once(self.update, -1)
return theRoot
def update(self, *args):
# set the size and position of the background image
self.rect.size = self.root.size
self.rect.pos = self.root.pos
TestApp().run()