Question

我在Relativelayout中有一条水平线（hLine）和一条垂直线（vLine）。水平线将只是触摸垂直线。当我移动“垂直线”时，如何动态更改水平线的宽度（即，水平线将拉伸而不是移动），以使其仅触摸垂直线。任何想法，请。在下面的给定示例中，假定``垂直线''仅向左滚动到右滚动，反之亦然（即水平移动）。对于样本，我仅提供了一条水平线。在我的实际项目中，将有至少10条水平线与垂直线接触。

from kivy.app import App
from kivy.graphics import Line, Color
from kivy.uix.scatter import Scatter
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.widget import Widget
from kivy.uix.label import Label
from kivy.core.window import Window

class MyPaintApp(App):

    def build(self):
        root = RelativeLayout()

        (ix, iy) = (100,100)
        (fx, fy) = (200,100)

        clr = Color(0.2, 0.2, 1)

        wdgt1 = Scatter(pos = (ix,iy), size = (fx-ix, 5))
        (ix,iy) = wdgt1.to_local(ix,iy,relative=True)
        (fx,fy) = wdgt1.to_local(fx, fy,relative=True)
        hLine = Line(points=[ix,iy, fx, fy], width=2, cap='none')
        lbl = Label(text='[color=3333ff]Horizontal[/color]', markup = True, pos=(ix,iy ))
        wdgt1.canvas.add(clr)
        wdgt1.canvas.add(hLine)
        wdgt1.add_widget(lbl)

        (fx, fy) = (200,150)
        (dx, dy) = (200,50)

        wdgt2 = Scatter(pos = (fx,fy), size = (5, fy - dy))
        (fx,fy) = wdgt2.to_local(fx, fy,relative=True)
        (dx,dy) = wdgt2.to_local(dx,dy,relative=True)
        vLine = Line(points=[fx,fy, dx, dy], width=2, cap='none')
        lbl = Label(text='[color=3333ff]Vertical[/color]', markup = True, pos=(fx,fy ))
        wdgt2.canvas.add(clr)
        wdgt2.canvas.add(vLine)
        wdgt2.add_widget(lbl)





        root.add_widget(wdgt1)
        root.add_widget(wdgt2)

        return root

if __name__ == '__main__':
    Window.clearcolor = (1, 1, 1, 1)
    MyPaintApp().run()

Answer 1

您可以通过在Canvas移动时重绘wdgt1的{{1}}来做到这一点。这是执行此操作的代码的修改版本：

wdgt2

KIVY根据另一个小部件位置更改小部件尺寸

1 个答案: