我正在尝试使用kivy制作笔记本应用,用户可以在其中上下滚动表格并在上面进行书写。我尝试使用ScrollView,但是它似乎不起作用-我希望将工作表图像拉伸到窗口的宽度,并且高度大于宽度-使图像可以上下滚动。相反,发生了什么:
我真的很感激有人研究代码并尝试弄清楚我在做什么错了:)
python代码:
import kivy
from kivy.lang import Builder
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.widget import Widget
from kivy.core.window import Window
from kivy.uix.boxlayout import BoxLayout
from PIL import Image as Image1
from kivy.uix.image import Image
GUI = Builder.load_file('style.kv')
Window.size = (1000, 200)
img_size = Image1.open("images/notebook.png").size
class NotebookScreen(GridLayout):
def __init__(self, **kwargs):
self.rows = 1
super(NotebookScreen, self).__init__(**kwargs)
def get_size_for_notebook(self, **kwargs):
global img_size
width, height = Window.size
return width, (img_size[0] * height / width)
class MainApp(App):
def build(self):
return NotebookScreen()
if __name__ == "__main__":
MainApp().run()
kv文件:
<NotebookScreen>
FloatLayout:
rows: 2
GridLayout:
size_hint: 1, .05
pos_hint: {"top": 1, "left": 1}
id: tool_bar
cols: 1
canvas:
Color:
rgba: 0, 0, 1, 1
Rectangle:
pos: self.pos
size: self.size
GridLayout:
id: notebook_grid
size_hint: 1, .95
pos_hint: {"top": .95, "left": 0}
cols: 1
ScrollView:
Image:
id: notebook_image
source: 'images/notebook.png'
allow_stretch: True
keep_ratio: True
pos: self.pos
size: root.get_size_for_notebook()
问题是您正在size
中设置Image
的kv
,但由于size_hint
取代了size
,所以它没有任何作用。默认的size_hint
为(1,1)
,因此不进行滚动(Image
被限制为适合ScrollView
)。要使您的size
生效,只需添加:
size_hint: None, None
到Image
中的kv
。