問題描述
我想在 Kivy 中創建帶有許多矩形按鈕的 GridLayout，其中包含一些不同大小的自定義圖像.為此，我想縮放圖像(我想這樣做的方式如下所示)，然后裁剪/隱藏溢出小部件邊框的部分.調整大小效果很好，但我不知道如何隱藏/裁剪矩形之外的部分.例如:如果小部件的尺寸為 10 像素 x 10 像素，而我的圖像為 100 像素 x 200 像素，我會將其調整為 10 像素 x 20 像素并在小部件中居中，但下方和上方的 5 像素將可見.我不要那個.:) 云有人幫我解決這個問題嗎?
I want to create GridLayout in Kivy with many rectangle buttons with some custom images with different size. To do so, I want to scale image (the way I wan to do this is shown below) and then crop/hide the parts that overflow the widget borders. The resizing works nice, but I can not figure out how to hide/crop that parts which are outside the rectangle. For example: if widget have dimensions of 10px x 10px and my image is 100px x 200px I will rezise it to 10px x 20px and center it in widget, but the 5px below and abowe will be visible. I do not want that. :) Cloud somebody help me with this problem?
class PlaceIcon(Widget):
def __init__(self,image_path, **kwargs):
super(PlaceIcon, self).__init__(**kwargs)
self.bind(size=self.adjust_size)
self.image = Image(source=image_path)
self.image_path = image_path
def adjust_size(self,*args):
(a,b) = self.image.texture.size
(x,y) = self.size
(x1,y1) = self.pos
if x > y:
scale = x/a
else:
scale = y/b
x1 -= (scale*a-x)/2
y1 -= (scale*b-y)/2
with self.canvas:
self.canvas.clear()
self.background = Rectangle(texture=self.image.texture, pos=(x1,y1), size=(scale*a,scale*b))
推薦答案
我會說看看Texture.get_region:http://kivy.org/docs/api-kivy.graphics.texture.html#kivy.graphics.texture.Texture.get_region
I would say to look at Texture.get_region: http://kivy.org/docs/api-kivy.graphics.texture.html#kivy.graphics.texture.Texture.get_region
因此，您可以只使用要顯示和傳遞的紋理部分，就好像它是完全不同的紋理一樣.
So you can use only the part of the texture you want to display and passing as if it was an entirely different texture.
另一種方法是使用 StencilView，但我認為這里的 get_region 更好.
Another way would be to use StencilView, but i think here the get_region is better.
這篇關于Kivy:如何使小部件表現得像溢出:隱藏的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！