如何在 kivy 中制作画廊？

编程问答 2022-04-23

问题描述

我想要在 kivy 中的这个画廊 how to make gallery view 如何添加这个 kivy 然后在画廊中显示许多显示和轮播？ How to make an image and display it on the next page 任何人都可以帮忙吗？

class gallery(Screen):
        pass

.kv

<MyTile@SmartTile>:
        size_hint_y: None
        height: "240dp"
    
<gallery>
    ScrollView:
        MDGridLayout:
            cols: 3
            row_default_height: (self.width - self.cols*self.spacing[0]) / self.cols
            row_force_default: True
            adaptive_height: True
            padding: dp(4),dp(4)
            spacing: dp(4)
            MyTile:
                source:'*.jpg'

https://i.stack.imgur.com/loupw.png

这里有问题..

[ WARN:1] global C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-vi271kac\opencv\modules\videoio\src\cap_msmf.cpp (376) `anonymous-namespace'::SourceReaderCB::OnReadSample videoio(MSMF): OnReadSample() is called with error status: -1072873821
[ WARN:1] global C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-vi271kac\opencv\modules\videoio\src\cap_msmf.cpp (388) `anonymous-namespace'::SourceReaderCB::OnReadSample videoio(MSMF): async ReadSample() call is Failed with error status: -1072873821
[INFO   ] [Loader      ] using a thread pool of 2 workers
[ERROR  ] [AsyncImage  ] Not found <*.jpg>
[INFO   ] [Base        ] Start application main loop
[ WARN:0] global C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-vi271kac\opencv\modules\videoio\src\cap_msmf.cpp (438) `anonymous-namespace'::SourceReaderCB::~SourceReaderCB terminating async callback

这是图库，但这里没有显示任何图片.. 任何人都可以告诉此代码代码中有什么问题吗？

解决方法

我画了一个画廊的例子，我想这就是你想要的。

from kivymd.app import MDApp

from kivy.metrics import dp
from kivy.lang.builder import Builder
from kivy.uix.boxlayout import BoxLayout

import os

KV = """
<ImageButton@ButtonBehavior+FitImage>

<ImageManager>
    path: ""
    orientation: "vertical"
    size_hint_y: None
    height: root.height
    padding: dp(10)

    ImageButton:
        source: root.path
        
BoxLayout:
    RecycleView:
        id: rv
        key_viewclass: "viewclass"
        RecycleGridLayout:
            padding: dp(2)
            cols: 3
            default_size: None,dp(48)
            default_size_hint: 1,None
            size_hint_y: None
            height: self.minimum_height
"""


class ImageManager(BoxLayout):
    pass


class GalleryApp(MDApp):
    def __init__(self,**kwargs):
        super().__init__(**kwargs)

        self.manager_list = []
        self.dir = os.getcwd()
        self.available_image_format = ['.png','.jpg','.jpeg','.bmp']  # etc

    def build(self):
        return Builder.load_string(KV)

    def on_start(self):
        self.load_images()

    def load_images(self):
        if not self.manager_list:
            for image in os.listdir(self.dir):
                target_filename,target_file_extension = os.path.splitext(image)
                if target_file_extension in self.available_image_format:
                    path_to_image = os.path.join(self.dir,image)
                    self.manager_list.append(
                        {
                            "viewclass": "ImageManager","path": path_to_image,"height": dp(200),}
                    )
            self.root.ids.rv.data = self.manager_list


GalleryApp().run()
image-gallerykivypython