manually tests RecycleGridLayout

manual_test_recyclegridlayout.py

from kivy.lang import Builder
from kivy.clock import Clock
from kivy.factory import Factory
from kivy.app import runTouchApp
from kivy.uix.recyclegridlayout import RecycleGridLayout


internal_attr_names = (
    '_has_hint_bound_x',
    '_has_hint_bound_y',
    '_cols_min_size_none',
    '_rows_min_size_none',
    '_cols',
    '_cols_sh',
    '_cols_sh_min',
    '_cols_sh_max',
    '_rows',
    '_rows_sh',
    '_rows_sh_min',
    '_rows_sh_max',
    '_cols_pos',
    '_rows_pos',
    '_cols_count',
    '_rows_count',
)
def print_internal_attrs(gl):
    s = '\n'.join(
        f"{name}: {getattr(gl, name)}"
        for name in internal_attr_names
        if hasattr(gl, name)
    )
    print(s, '\n')


class DebugRecycleGridLayout(RecycleGridLayout):
    pass
def wrap(func):
    def wrapper(self, *args, **kwargs):
        print("------------------------------------------")
        r = func(self, *args, **kwargs)
        print(f"after '{func.__name__}()' was called")
        print_internal_attrs(self)
        return r
    return wrapper
for method_name in (
    # "_init_rows_cols_sizes",
    # "_fill_rows_cols_sizes",
    # "_update_minimum_size",
    # "_finalize_rows_cols_sizes",
    "_update_rows_cols_sizes",
    # "compute_visible_views",
):
    method = getattr(DebugRecycleGridLayout, method_name)
    setattr(DebugRecycleGridLayout, method_name, wrap(method))

KV_CODE = '''
#:import random random

<Separator@Widget>:
    size: 1, 1
    canvas:
        Color:
            rgb: 1, 0, 1
        Rectangle:
            pos: self.pos
            size: self.size

BoxLayout:
    BoxLayout:
        size_hint_x: .2
        size_hint_min_x: 300
        orientation: 'vertical'
        Label:
            text: 'orientation'
            color: 0, 1, 0, 1
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'lr-tb'
            Label:
                text: 'lr-tb'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'lr-bt'
            Label:
                text: 'lr-bt'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'rl-tb'
            Label:
                text: 'rl-tb'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'rl-bt'
            Label:
                text: 'rl-bt'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'tb-lr'
            Label:
                text: 'tb-lr'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'tb-rl'
            Label:
                text: 'tb-rl'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'bt-lr'
            Label:
                text: 'bt-lr'
        BoxLayout:
            CheckBox:
                group: 'orientation'
                on_active: gl.orientation = 'bt-rl'
            Label:
                text: 'bt-rl'
        Separator:
            size_hint_y: None
        Label:
            text: 'number of columns\\n{}'.format(int(n_cols.value) or None)
            halign: 'center'
            color: 0, 1, 0, 1
        Slider:
            id: n_cols
            min: 0
            max: 10
            step: 1
            value: 10
        Separator:
            size_hint_y: None
            height: 1
        Label:
            text: 'number of rows\\n{}'.format(int(n_rows.value) or None)
            halign: 'center'
            color: 0, 1, 0, 1
        Slider:
            id: n_rows
            min: 0
            max: 10
            step: 1
            value: 10
        Separator:
            size_hint_y: None
            height: 1
        Separator:
            size_hint_y: None
            height: 1
        Button:
            text: "trigger _update_rows_cols_sizes()"
            on_press: random.choice(gl.children).size = (50, 50, )
                
        Button:
            text: 'random number of children'
            on_press:
                rv.data = (
                {'text': str(i)} for i in range(random.randint(2, 40))
                )
    Separator:
        size_hint_x: None
    RecycleView:
        id: rv
        viewclass: 'Button'
        data: ({'text': str(i)} for i in range(20))
        DebugRecycleGridLayout:
            id: gl
            spaing: 5
            padding: 5
            default_size_hint: None, None
            default_size: 100, 100
            size_hint: None, None
            size: self.minimum_size
            cols: int(n_cols.value) or None
            rows: int(n_rows.value) or None

'''
root = Builder.load_string(KV_CODE)
runTouchApp(root)