Python:如何在 RecycleView 中添加垂直滚动 [英] Python : How to add vertical scroll in RecycleView

问题描述

我正在使用 Python-2.7 和 kivy.
我运行 test.py 然后显示一个菜单 Test.当我点击它然后显示 list 的数据.谁能告诉我如何在列表中添加垂直 scrollbar.

test.py

从 kivy.app 导入 App从 kivy.uix.boxlayout 导入 BoxLayout从 kivy.properties 导入 BooleanProperty、ListProperty、ObjectProperty、NumericProperty、DictProperty从 kivy.uix.recycleview.views 导入 RecycleDataViewBehavior从 kivy.uix.button 导入按钮从 kivy.uix.recyclegridlayout 导入 RecycleGridLayout从 kivy.uix.behaviors 导入 FocusBehavior从 kivy.uix.recycleview.layout 导入 LayoutSelectionBehavior从 kivy.uix.popup 导入弹出窗口从 kivy.core.window 导入窗口从 kivy.clock 导入时钟窗口大小 = (600, 325)类 SelectableRecycleGridLayout(FocusBehavior，LayoutSelectionBehavior，回收网格布局):''' 将选择和焦点行为添加到视图.'''selected_row = NumericProperty(0)def get_nodes(self):节点 = self.get_selectable_nodes()如果 self.nodes_order_reversed:节点=节点[::-1]如果不是节点:返回无，无selected = self.selected_nodesif not selected: # 没有选择，选择第一个self.select_node(节点[0])self.selected_row = 0返回无，无if len(nodes) == 1: # 唯一可选择的节点已经被选中返回无，无最后 = 节点索引(选定 [-1])self.clear_selection()最后返回，节点def select_next(self):'''选择下一行'''最后，节点 = self.get_nodes()如果不是节点:返回如果最后 == len(nodes) - 1:self.select_node(节点[0])self.selected_row = 节点[0]别的:self.select_node(nodes[last + 1])self.selected_row = 节点[last + 1]def select_previous(self):''' 选择上一行 '''最后，节点 = self.get_nodes()如果不是节点:返回如果不是最后:self.select_node(节点[-1])self.selected_row = 节点[-1]别的:self.select_node(nodes[last - 1])self.selected_row = 节点[last - 1]def select_current(self):''' 选择当前行 '''最后，节点 = self.get_nodes()如果不是节点:返回self.select_node(节点[self.selected_row])类 SelectableButton(RecycleDataViewBehavior，按钮):''' 为按钮添加选择支持 '''索引 = 无选择 = BooleanProperty(False)可选 = BooleanProperty(True)def refresh_view_attrs(self, rv, index, data):''' 捕捉并处理视图变化 '''self.index = 索引return super(SelectableButton, self).refresh_view_attrs(rv, index, data)def on_touch_down(自我，触摸):'''在触地时添加选择'''if super(SelectableButton, self).on_touch_down(touch):返回真如果 self.collide_point(*touch.pos) 和 self.selectable:打印(on_touch_down:自我="，自我)返回 self.parent.select_with_touch(self.index, touch)def apply_selection(self, rv, index, is_selected):''' 响应视图中项目的选择.'''self.selected = is_selectedRV类(BoxLayout):data_items = ListProperty([])row_data = DictProperty({})col1_data = ListProperty([])col2_data = ListProperty([])col1_row_controller = ObjectProperty(无)col2_row_controller = ObjectProperty(无)def __init__(self, **kwargs):超级(房车，自我).__init__(**kwargs)self.get_states()Clock.schedule_once(self.set_default_first_row, .0005)self._request_keyboard()def _request_keyboard(self):self._keyboard = Window.request_keyboard(self._keyboard_closed，自我，'文本')如果 self._keyboard.widget:# 如果它存在，这个小部件是一个你可以使用的 VKeyboard 对象# 更改键盘布局.经过self._keyboard.bind(on_key_down=self._on_keyboard_down)def _keyboard_closed(self):self._keyboard.unbind(on_key_down=self._on_keyboard_down)self._keyboard = 无def _on_keyboard_down(自我，键盘，键码，文本，修饰符):if keycode[1] == 'down': # keycode[274, 'down'] 按下# 响应键盘向下箭头按下self.display_keystrokes(键盘、键码、文本、修饰符)self.col1_row_controller.select_next()self.col2_row_controller.select_next()elif keycode[1] == 'up': # keycode[273, 'up] 按下# 响应键盘向上箭头按下self.display_keystrokes(键盘、键码、文本、修饰符)self.col1_row_controller.select_previous()self.col2_row_controller.select_previous()# Keycode由整数+字符串组成# 如果我们按下escape，释放键盘如果键码 [1] == '转义':键盘.release()# 返回 True 以接受密钥.否则，它将被# 系统.返回真def display_keystrokes(self, keyboard, keycode, text, modifiers):print("
键", keycode, "已被按下")print(" - 文本是 %r" % 文本)print(" - 修饰符是 %r" % 修饰符)def on_keyboard_select(self):''' 响应键盘事件调用 Popup '''# 为 Popup 设置行数据self.row_data = self.col1_data[self.col1_row_controller.selected_row]# 调用弹出窗口self.popup_callback()def on_mouse_select(self, instance):'''响应鼠标事件调用Popup '''if (self.col1_row_controller.selected_row != instance.index或 self.col2_row_controller.selected_row ！= instance.index):# 鼠标点击的行不等于当前选中的行self.col1_row_controller.selected_row = instance.indexself.col2_row_controller.selected_row = instance.index# 高亮鼠标点击/选中的行self.col1_row_controller.select_current()self.col2_row_controller.select_current()# 为 Popup 设置行数据# 我们可以使用 col1_data 或 col2_data，因为它们是重复的，并且每个都存储相同的信息self.row_data = self.col1_data[instance.index]# 调用弹出窗口self.popup_callback()def popup_callback(self):# 启用键盘请求self._request_keyboard()def set_default_first_row(self, dt):''' 设置默认第一行为选中'''self.col1_row_controller.select_next()self.col2_row_controller.select_next()定义更新(自我):self.col1_data = [{'text': str(x[0]), 'Id': str(x[0]), 'Name': x[1], 'key': 'Id', 'selectable': 真的}对于 self.data_items 中的 x]self.col2_data = [{'text': x[1], 'Id': str(x[0]), 'Name': x[1], 'key': 'Name', 'selectable': True}对于 self.data_items 中的 x]def get_states(self):行 = [(1, 'abc'), (1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc')]我 = 0对于行中的行:self.data_items.append([row[0], row[1], i])我 += 1打印(self.data_items)自我更新()类 MainMenu(BoxLayout):states_cities_or_areas = ObjectProperty(无)rv = 对象属性(无)定义显示状态(自我):self.remove_widgets()self.rv = RV()self.states_cities_or_areas.add_widget(self.rv)def remove_widgets(self):self.states_cities_or_areas.clear_widgets()类测试应用程序(应用程序):标题=测试"定义构建(自我):返回主菜单()如果 __name__ == '__main__':TestApp().run()

test.kv

#:kivy 1.10.0<可选按钮>:画布之前:颜色:rgba: (0, 0.517, 0.705, 1) if self.selected else (0, 0.517, 0.705, 1)长方形:pos: self.pos尺寸:self.sizebackground_color: [1, 0, 0, 1] if self.selected else [1, 1, 1, 1] #深红色 else深灰色on_press: app.root.rv.on_mouse_select(self)<房车>:col1_row_controller:col1_row_controllercol2_row_controller: col2_row_controller方向:垂直"网格布局:大小提示:1，无size_hint_y:无身高:25列数:3标签:size_hint_x: .1文字:身份证"标签:size_hint_x:0.5文字:姓名"滚动视图:id: kr_scrolldo_scroll_x: 假高度:2盒子布局:回收视图:size_hint_x: .1数据:root.col1_data视图类:可选按钮"可选回收网格布局:id: col1_row_controllerkey_selection: '可选择的'列数:1default_size:无，dp(26)default_size_hint:1，无size_hint_y:无高度:self.minimum_height方向:垂直"多选:真touch_multiselect:真回收视图:size_hint_x:0.5数据:root.col2_data视图类:可选按钮"可选回收网格布局:id: col2_row_controllerkey_selection: '可选择的'列数:1default_size:无，dp(26)default_size_hint:1，无size_hint_y:无高度:self.minimum_height方向:垂直"多选:真touch_multiselect:真<菜单按钮@按钮>:text_size: self.size对齐:中间"padding_x: 5尺寸:(80,30)size_hint:(无，无)背景颜色:90、90、90、90背景正常:''颜色:0、0.517、0.705、1边框:(0, 10, 0, 0)<主菜单>:states_cities_or_areas: states_cities_or_areas盒子布局:方向:垂直"#间距:10盒子布局:画布之前:长方形:pos: self.pos尺寸:self.sizesize_hint_y: 1菜单按钮:编号:btn文字:'测试'尺寸:(60,30)on_release: root.display_states()盒子布局:画布之前:长方形:pos: self.pos尺寸:self.size颜色:RGB:(1,1,1)标签:size_hint_x: 45盒子布局:id: states_cities_or_areassize_hint_y: 10标签:size_hint_y: 1

解决方案

问题

<块引用>

如何仅在 customerId 列和其他列中设置文本右对齐应该左对齐吗?

解决方案

片段

def apply_selection(self, rv, index, is_selected):''' 响应视图中项目的选择.'''self.selected = is_selectedself.text_size = self.size如果 index == rv.data[index]['range'][0]:self.halign = '对'别的:self.halign = '左'

输出

标签 - 文本垂直增长并以特定宽度换行

一个可以垂直增长但以一定宽度包裹文本的Label:

标签:size_hint_y:无text_size:self.width，无高度:self.texture_size[1]

要在 X 轴/水平和 Y 轴/垂直滚动 GridLayout，请将 size_hint 属性设置为 (None, None).

ScrollView - ScrollEffect、scroll_type、bar_width 等

<块引用>

默认情况下，ScrollView 允许沿 X 轴和 Y 轴滚动.您可以通过将 do_scroll_x 或 do_scroll_y 属性设置为 False 来显式禁用轴上的滚动.

要在 Y 轴/垂直方向上滚动 GridLayout，请设置孩子的宽度为 ScrollView (size_hint_x=1)，并设置size_hint_y 属性为无:

当滚动超出 ScrollView 的边界时，它使用 ScrollEffect 来处理过度滚动.

滚动类型

设置用于滚动视图内容的滚动类型.可用选项有:['content']、['bars']、['bars'、'content']

['bars'] 通过拖动或滑动滑动条来滚动内容.

网格布局

<块引用>

cols_minimum

每列的最小宽度字典.字典键是列号，例如0、1、2……

cols_minimum 是一个 DictProperty，默认为 {}.

片段

:行控制器:行控制器bar_width: 10bar_color: 1, 0, 0, 1 # 红色bar_inactive_color: 0, 0, 1, 1 # 蓝色effect_cls: "滚动效果"滚动类型:['条']数据:root.rv_data视图类:可选按钮"可选回收网格布局:id:row_controllerkey_selection: '可选择的'列:root.total_col_headingscols_minimum:root.cols_minimumdefault_size:无，dp(26)default_size_hint:1，无size_hint:无，无高度:self.minimum_height宽度:self.minimum_width方向:垂直"多选:真touch_multiselect:真

以下示例演示:

1. 在 X 轴上滚动表格标题.
2. 支持X轴和Y轴滚动.
3. 支持弹窗 Y 轴滚动.
4. 适用于数据库表中的任何列.
5. 使用 GridLayout 改变列宽cols_minimum.
6. 将两个 RecycleView 合二为一，因为不需要为 ID 设置一个 recycleview.
7. 可选择的按钮.

SQLite 示例数据库

chinook SQLite 示例数据库

示例

main.py

从 kivy.app 导入 App从 kivy.uix.boxlayout 导入 BoxLayout从 kivy.properties 导入 BooleanProperty、ListProperty、ObjectProperty、NumericProperty、DictProperty从 kivy.uix.recycleview.views 导入 RecycleDataViewBehavior从 kivy.uix.button 导入按钮从 kivy.uix.recyclegridlayout 导入 RecycleGridLayout从 kivy.uix.behaviors 导入 FocusBehavior从 kivy.uix.recycleview.layout 导入 LayoutSelectionBehavior从 kivy.uix.popup 导入弹出窗口从 kivy.core.window 导入窗口从 kivy.clock 导入时钟从 kivy.uix.scrollview 导入 ScrollView从 kivy.uix.label 导入标签从 kivy.uix.textinput 导入 TextInput从 kivy.uix.recycleview 导入 RecycleView将 sqlite3 导入为 lite重新进口窗口大小 = (600, 325)类 PopupLabelCell(标签):经过类 EditStatePopup(弹出):def __init__(self, obj, **kwargs):super(EditStatePopup, self).__init__(**kwargs)self.populate_content(obj)def populate_content(self, obj):对于 x 在范围内(len(obj.table_header.col_headings)):self.container.add_widget(PopupLabelCell(text=obj.table_header.col_headings[x]))textinput = TextInput(text=str(obj.row_data[x]))如果 x == 0:textinput.readonly = Trueself.container.add_widget(textinput)类 SelectableRecycleGridLayout(FocusBehavior，LayoutSelectionBehavior，回收网格布局):''' 将选择和焦点行为添加到视图.'''selected_row = NumericProperty(0)obj = ObjectProperty(无)def get_nodes(self):节点 = self.get_selectable_nodes()如果 self.nodes_order_reversed:节点=节点[::-1]如果不是节点:返回无，无selected = self.selected_nodesif not selected: # 没有选择，选择第一个self.selected_row = 0self.select_row(节点)返回无，无if len(nodes) == 1: # 唯一可选择的节点已经被选中返回无，无最后 = 节点索引(选定 [-1])self.clear_selection()最后返回，节点def select_next(self, obj):'''选择下一行'''自我.obj = obj最后，节点 = self.get_nodes()如果不是节点:返回如果最后 == len(nodes) - 1:self.selected_row = 节点[0]别的:self.selected_row = 节点[last + 1]self.selected_row += self.obj.total_col_headingsself.select_row(节点)def select_previous(self, obj):''' 选择上一行 '''自我.obj = obj最后，节点 = self.get_nodes()如果不是节点:返回如果不是最后:self.selected_row = 节点[-1]别的:self.selected_row = 节点[last - 1]self.selected_row -= self.obj.total_col_headingsself.select_row(节点)def select_current(self, obj):''' 选择当前行 '''自我.obj = obj最后，节点 = self.get_nodes()如果不是节点:返回self.select_row(节点)def select_row(自我，节点):col = self.obj.rv_data[self.selected_row]['range']对于范围内的 x(col[0]，col[1] + 1):self.select_node(节点[x])类 SelectableButton(RecycleDataViewBehavior，按钮):''' 为按钮添加选择支持 '''索引 = 无选择 = BooleanProperty(False)可选 = BooleanProperty(True)def refresh_view_attrs(self, rv, index, data):''' 捕捉并处理视图变化 '''self.index = 索引return super(SelectableButton, self).refresh_view_attrs(rv, index, data)def on_touch_down(自我，触摸):'''在触地时添加选择'''if super(SelectableButton, self).on_touch_down(touch):返回真如果 self.collide_point(*touch.pos) 和 self.selectable:打印(on_touch_down:自我="，自我)返回 self.parent.select_with_touch(self.index, touch)def apply_selection(self, rv, index, is_selected):''' 响应视图中项目的选择.'''self.selected = is_selectedself.text_size = self.size如果 index == rv.data[index]['range'][0]:self.halign = '对'别的:self.halign = '左'类 HeaderCell(标签):经过类表头(滚动视图):"""固定的表头，用数据表滚动 x"""标头 = 对象属性(无)col_headings = ListProperty([])cols_minimum = 字典属性({})def __init__(self, **kwargs):super(TableHeader, self).__init__(**kwargs)self.db = lite.connect('chinook.db')self.db_cursor = self.db.cursor()self.get_table_column_headings()def get_table_column_headings(self):self.db_cursor.execute("PRAGMA table_info(customers)")col_headings = self.db_cursor.fetchall()对于 col_headings 中的 col_heading:data_type = col_heading[2]如果 data_type == 整数":self.cols_minimum[col_heading[0]] = 100别的:self.cols_minimum[col_heading[0]] = int(re.findall(r'd+', data_type).pop(0)) * 5self.col_headings.append(col_heading[1])self.header.add_widget(HeaderCell(text=col_heading[1], width=self.cols_minimum[col_heading[0]]))房车类(回收视图):row_data = ()rv_data = ListProperty([])row_controller = ObjectProperty(无)total_col_headings = NumericProperty(0)cols_minimum = 字典属性({})table_header = ObjectProperty(无)def __init__(self, table_header, **kwargs):超级(房车，自我).__init__(**kwargs)self.table_header = table_headerself.total_col_headings = len(table_header.col_headings)self.cols_minimum = table_header.cols_minimumself.database_connection()self.get_states()Clock.schedule_once(self.set_default_first_row, .0005)self._request_keyboard()def 数据库连接(自我):self.db = lite.connect('chinook.db')self.db_cursor = self.db.cursor()def _request_keyboard(self):self._keyboard = Window.request_keyboard(self._keyboard_closed，自我，'文本')如果 self._keyboard.widget:# 如果它存在，这个小部件是一个你可以使用的 VKeyboard 对象# 更改键盘布局.经过self._keyboard.bind(on_key_down=self._on_keyboard_down)def _keyboard_closed(self):self._keyboard.unbind(on_key_down=self._on_keyboard_down)self._keyboard = 无def _on_keyboard_down(自我，键盘，键码，文本，修饰符):if keycode[1] == 'down': # keycode[274, 'down'] 按下# 响应键盘向下箭头按下self.display_keystrokes(键盘、键码、文本、修饰符)self.row_controller.select_next(self)elif keycode[1] == 'up': # keycode[273, 'up] 按下# 响应键盘向上箭头按下self.display_keystrokes(键盘、键码、文本、修饰符)self.row_controller.select_previous(self)elif len(修饰符)>0 和修饰符[0] == 'ctrl' 和 text == 'e': # ctrl + e 按下# 响应键盘 ctrl + e 按下，并调用 Popupself.display_keystrokes(键盘、键码、文本、修饰符)self.on_keyboard_select()# Keycode由整数+字符串组成# 如果我们按下escape，释放键盘如果键码 [1] == '转义':键盘.release()# 返回 True 以接受密钥.否则，它将被# 系统.返回真def display_keystrokes(self, keyboard, keycode, text, modifiers):print("
键", keycode, "已被按下")print(" - 文本是 %r" % 文本)print(" - 修饰符是 %r" % 修饰符)def on_keyboard_select(self):''' 响应键盘事件调用 Popup '''# 为 Popup 设置行数据self.setup_row_data(self.rv_data[self.row_controller.selected_row]['Index'])# 调用弹出窗口self.popup_callback()def on_mouse_select(self, instance):'''响应鼠标事件调用Popup '''如果 self.row_controller.selected_row ！= instance.index:# 鼠标点击的行不等于当前选中的行self.row_controller.selected_row = instance.index# 高亮鼠标点击/选中的行self.row_controller.select_current(self)# 为 Popup 设置行数据self.setup_row_data(self.rv_data[instance.index]['Index'])# 调用弹出窗口self.popup_callback()# 启用键盘请求self._request_keyboard()def setup_row_data(自我，价值):self.db_cursor.execute("SELECT * FROM customers WHERE CustomerId=?", value)self.row_data = self.db_cursor.fetchone()def popup_callback(self):''' 实例化并打开弹出窗口 '''popup = EditStatePopup(self)popup.open()def set_default_first_row(self, dt):''' 设置默认第一行为选中'''self.row_controller.select_next(self)def get_states(self):self.db_cursor.execute("SELECT * FROM customers ORDER BY CustomerId ASC")行 = self.db_cursor.fetchall()数据 = []低 = 0高 = self.total_col_headings - 1对于行中的行:对于我在范围内(长度(行)):data.append([row[i], row[0], [low, high]])低 += self.total_col_headings高 += self.total_col_headingsself.rv_data = [{'text': str(x[0]), 'Index': str(x[1]), 'range': x[2], 'selectable': True} for x in data]类表(BoxLayout):rv = 对象属性(无)def __init__(self, **kwargs):超级(表，自我).__init__(**kwargs)self.orientation = "垂直"self.header = TableHeader()self.rv = RV(self.header)self.rv.fbind('scroll_x', self.scroll_with_header)self.add_widget(self.header)self.add_widget(self.rv)def scroll_with_header(self, obj, value):self.header.scroll_x = 值类 MainMenu(BoxLayout):states_cities_or_areas = ObjectProperty(无)表 = 对象属性(无)定义显示状态(自我):self.remove_widgets()self.table = 表()self.states_cities_or_areas.add_widget(self.table)def remove_widgets(self):self.states_cities_or_areas.clear_widgets()类测试应用程序(应用程序):标题=测试"定义构建(自我):返回主菜单()如果 __name__ == '__main__':TestApp().run()

test.kv

#:kivy 1.10.0<弹出标签单元格>size_hint:(无，无)身高:30text_size: self.size对齐:左"对齐:中间"<EditStatePopup>:容器:容器size_hint:无，无尺寸:400、275标题大小:20# title_font: "Verdana"auto_dismiss: 假盒子布局:方向:垂直"滚动视图:bar_width: 10bar_color: 1, 0, 0, 1 # 红色bar_inactive_color: 0, 0, 1, 1 # 蓝色effect_cls: "滚动效果"滚动类型:['条']size_hint:(1，无)网格布局:编号:容器列数:2行默认高度:30cols_minimum: {0: 100, 1: 300}# 间距:10, 10# 填充:20、20size_hint:(无，无)高度:self.minimum_height盒子布局:按钮:大小提示:1, 0.2文本:保存更改"on_release:root.dismiss()按钮:大小提示:1, 0.2文本:取消更改"on_release: root.dismiss()<可选按钮>:画布之前:颜色:rgba: (0, 0.517, 0.705, 1) if self.selected else (0, 0.517, 0.705, 1)长方形:pos: self.pos尺寸:self.sizebackground_color: [1, 0, 0, 1] if self.selected else [1, 1, 1, 1] #深红色 else深灰色on_press:app.root.table.rv.on_mouse_select(self)<标题单元格>size_hint:(无，无)身高:25text_size: self.size对齐:左"对齐:中间"背景_禁用_正常:''disabled_color: (1, 1, 1, 1)画布之前:颜色:RGBA:1、0.502、0、1长方形:pos: self.pos尺寸:self.size<表头>:标头:标头bar_width: 0do_scroll: 假size_hint:(1，无)身高:25effect_cls: "滚动效果"网格布局:id: 标头行数:1cols_minimum:root.cols_minimumsize_hint:(无，无)宽度:self.minimum_width高度:self.minimum_height<房车>:行控制器:行控制器bar_width: 10bar_color: 1, 0, 0, 1 # 红色bar_inactive_color: 0, 0, 1, 1 # 蓝色effect_cls: "滚动效果"滚动类型:['条']数据:root.rv_data视图类:可选按钮"可选回收网格布局:id:row_controllerkey_selection: '可选择的'列:root.total_col_headingscols_minimum:root.cols_minimumdefault_size:无，dp(26)default_size_hint:1，无size_hint:无，无高度:self.minimum_height宽度:self.minimum_width方向:垂直"多选:真touch_multiselect:真<菜单按钮@按钮>:text_size: self.size对齐:中间"padding_x: 5尺寸:(80,30)size_hint:(无，无)背景颜色:90、90、90、90背景正常:''颜色:0、0.517、0.705、1边框:(0, 10, 0, 0)<主菜单>:states_cities_or_areas: states_cities_or_areas盒子布局:方向:垂直"盒子布局:画布之前:长方形:pos: self.pos尺寸:self.sizesize_hint_y: 1菜单按钮:编号:btn文字:'测试'尺寸:(60,30)on_release: root.display_states()盒子布局:画布之前:长方形:pos: self.pos尺寸:self.size颜色:RGB:(1,1,1)标签:size_hint_x: 45盒子布局:id: states_cities_or_areassize_hint_y: 10标签:size_hint_y: 1

输出

I am using Python-2.7 and kivy.
I run test.py then show a menu Test.When i click on it then show list of data. Can someone tell me how to add vertical scrollbar on list.

test.py

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import BooleanProperty, ListProperty, ObjectProperty, NumericProperty, DictProperty

from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.button import Button
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
from kivy.uix.popup import Popup
from kivy.core.window import Window
from kivy.clock import Clock

Window.size = (600, 325)

class SelectableRecycleGridLayout(FocusBehavior, LayoutSelectionBehavior,
                                  RecycleGridLayout):
    ''' Adds selection and focus behaviour to the view. '''

    selected_row = NumericProperty(0)

    def get_nodes(self):
        nodes = self.get_selectable_nodes()
        if self.nodes_order_reversed:
            nodes = nodes[::-1]
        if not nodes:
            return None, None

        selected = self.selected_nodes
        if not selected:    # nothing selected, select the first
            self.select_node(nodes[0])
            self.selected_row = 0
            return None, None

        if len(nodes) == 1:     # the only selectable node is selected already
            return None, None

        last = nodes.index(selected[-1])
        self.clear_selection()
        return last, nodes

    def select_next(self):
        ''' Select next row '''
        last, nodes = self.get_nodes()
        if not nodes:
            return

        if last == len(nodes) - 1:
            self.select_node(nodes[0])
            self.selected_row = nodes[0]
        else:
            self.select_node(nodes[last + 1])
            self.selected_row = nodes[last + 1]

    def select_previous(self):
        ''' Select previous row '''
        last, nodes = self.get_nodes()
        if not nodes:
            return

        if not last:
            self.select_node(nodes[-1])
            self.selected_row = nodes[-1]
        else:
            self.select_node(nodes[last - 1])
            self.selected_row = nodes[last - 1]

    def select_current(self):
        ''' Select current row '''
        last, nodes = self.get_nodes()
        if not nodes:
            return

        self.select_node(nodes[self.selected_row])


class SelectableButton(RecycleDataViewBehavior, Button):
    ''' Add selection support to the Button '''
    index = None
    selected = BooleanProperty(False)
    selectable = BooleanProperty(True)

    def refresh_view_attrs(self, rv, index, data):
        ''' Catch and handle the view changes '''

        self.index = index
        return super(SelectableButton, self).refresh_view_attrs(rv, index, data)

    def on_touch_down(self, touch):
        ''' Add selection on touch down '''
        if super(SelectableButton, self).on_touch_down(touch):
            return True
        if self.collide_point(*touch.pos) and self.selectable:
            print("on_touch_down: self=", self)
            return self.parent.select_with_touch(self.index, touch)

    def apply_selection(self, rv, index, is_selected):
        ''' Respond to the selection of items in the view. '''
        self.selected = is_selected


class RV(BoxLayout):
    data_items = ListProperty([])
    row_data = DictProperty({})
    col1_data = ListProperty([])
    col2_data = ListProperty([])
    col1_row_controller = ObjectProperty(None)
    col2_row_controller = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.get_states()
        Clock.schedule_once(self.set_default_first_row, .0005)
        self._request_keyboard()

    def _request_keyboard(self):
        self._keyboard = Window.request_keyboard(
            self._keyboard_closed, self, 'text'
        )
        if self._keyboard.widget:
            # If it exists, this widget is a VKeyboard object which you can use
            # to change the keyboard layout.
            pass
        self._keyboard.bind(on_key_down=self._on_keyboard_down)

    def _keyboard_closed(self):
        self._keyboard.unbind(on_key_down=self._on_keyboard_down)
        self._keyboard = None

    def _on_keyboard_down(self, keyboard, keycode, text, modifiers):
        if keycode[1] == 'down':    # keycode[274, 'down'] pressed
            # Respond to keyboard down arrow pressed
            self.display_keystrokes(keyboard, keycode, text, modifiers)
            self.col1_row_controller.select_next()
            self.col2_row_controller.select_next()

        elif keycode[1] == 'up':    # keycode[273, 'up] pressed
            # Respond to keyboard up arrow pressed
            self.display_keystrokes(keyboard, keycode, text, modifiers)
            self.col1_row_controller.select_previous()
            self.col2_row_controller.select_previous()

        # Keycode is composed of an integer + a string
        # If we hit escape, release the keyboard
        if keycode[1] == 'escape':
            keyboard.release()

        # Return True to accept the key. Otherwise, it will be used by
        # the system.
        return True

    def display_keystrokes(self, keyboard, keycode, text, modifiers):
        print("
The key", keycode, "have been pressed")
        print(" - text is %r" % text)
        print(" - modifiers are %r" % modifiers)

    def on_keyboard_select(self):
        ''' Respond to keyboard event to call Popup '''

        # setup row data for Popup
        self.row_data = self.col1_data[self.col1_row_controller.selected_row]

        # call Popup
        self.popup_callback()

    def on_mouse_select(self, instance):
        ''' Respond to mouse event to call Popup '''

        if (self.col1_row_controller.selected_row != instance.index
                or self.col2_row_controller.selected_row != instance.index):
            # Mouse clicked on row is not equal to current selected row
            self.col1_row_controller.selected_row = instance.index
            self.col2_row_controller.selected_row = instance.index

            # Hightlight mouse clicked/selected row
            self.col1_row_controller.select_current()
            self.col2_row_controller.select_current()

        # setup row data for Popup
        # we can use either col1_data or col2_data because they are duplicate and each stores the same info
        self.row_data = self.col1_data[instance.index]

        # call Popup
        self.popup_callback()

    def popup_callback(self):

        # enable keyboard request
        self._request_keyboard()

    def set_default_first_row(self, dt):
        ''' Set default first row as selected '''
        self.col1_row_controller.select_next()
        self.col2_row_controller.select_next()

    def update(self):
        self.col1_data = [{'text': str(x[0]), 'Id': str(x[0]), 'Name': x[1], 'key': 'Id', 'selectable': True}
                          for x in self.data_items]

        self.col2_data = [{'text': x[1], 'Id': str(x[0]), 'Name': x[1], 'key': 'Name', 'selectable': True}
                          for x in self.data_items]

    def get_states(self):
        rows = [(1, 'abc'), (1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc'),(1, 'abc')]

        i = 0
        for row in rows:
            self.data_items.append([row[0], row[1], i])
            i += 1
        print(self.data_items)
        self.update()


class MainMenu(BoxLayout):
    states_cities_or_areas = ObjectProperty(None)
    rv = ObjectProperty(None)

    def display_states(self):
        self.remove_widgets()
        self.rv = RV()
        self.states_cities_or_areas.add_widget(self.rv)

    def remove_widgets(self):
        self.states_cities_or_areas.clear_widgets()


class TestApp(App):
    title = "test"

    def build(self):
        return MainMenu()


if __name__ == '__main__':
    TestApp().run()

test.kv

#:kivy 1.10.0

<SelectableButton>:
    canvas.before:
        Color:
            rgba: (0, 0.517, 0.705, 1) if self.selected else (0, 0.517, 0.705, 1)
        Rectangle:
            pos: self.pos
            size: self.size
    background_color: [1, 0, 0, 1]  if self.selected else [1, 1, 1, 1]  # dark red else dark grey
    on_press: app.root.rv.on_mouse_select(self)


<RV>:
    col1_row_controller: col1_row_controller
    col2_row_controller: col2_row_controller

    orientation: "vertical"

    GridLayout:
        size_hint: 1, None
        size_hint_y: None
        height: 25
        cols: 3

        Label:
            size_hint_x: .1
            text: "Id"
        Label:
            size_hint_x: .5
            text: "Name"


    ScrollView:
        id: kr_scroll
        do_scroll_x: False
        height: 2
        BoxLayout:
            RecycleView:
                size_hint_x: .1
                data: root.col1_data
                viewclass: 'SelectableButton'
                SelectableRecycleGridLayout:
                    id: col1_row_controller
                    key_selection: 'selectable'
                    cols: 1
                    default_size: None, dp(26)
                    default_size_hint: 1, None
                    size_hint_y: None
                    height: self.minimum_height
                    orientation: 'vertical'
                    multiselect: True
                    touch_multiselect: True

            RecycleView:
                size_hint_x: .5
                data: root.col2_data
                viewclass: 'SelectableButton'
                SelectableRecycleGridLayout:
                    id: col2_row_controller
                    key_selection: 'selectable'
                    cols: 1
                    default_size: None, dp(26)
                    default_size_hint: 1, None
                    size_hint_y: None
                    height: self.minimum_height
                    orientation: 'vertical'
                    multiselect: True
                    touch_multiselect: True


<MenuButton@Button>:
    text_size: self.size
    valign: "middle"
    padding_x: 5
    size : (80,30)
    size_hint : (None, None)
    background_color: 90 , 90, 90, 90
    background_normal: ''
    color: 0, 0.517, 0.705, 1
    border: (0, 10, 0, 0)


<MainMenu>:
    states_cities_or_areas: states_cities_or_areas

    BoxLayout:
        orientation: 'vertical'
        #spacing : 10

        BoxLayout:
            canvas.before:
                Rectangle:
                    pos: self.pos
                    size: self.size

            size_hint_y: 1

            MenuButton:
                id: btn
                text: 'Test'
                size : (60,30)
                on_release: root.display_states()


        BoxLayout:
            canvas.before:
                Rectangle:
                    pos: self.pos
                    size: self.size

                Color:
                    rgb: (1,1,1)

            Label:
                size_hint_x: 45

        BoxLayout:
            id: states_cities_or_areas
            size_hint_y: 10

        Label:
            size_hint_y: 1

解决方案

Question

How to set text right align in only customerId column and other column should be left align?

Solution

Snippet

def apply_selection(self, rv, index, is_selected):
    ''' Respond to the selection of items in the view. '''
    self.selected = is_selected
    self.text_size = self.size
    if index == rv.data[index]['range'][0]:
        self.halign = 'right'
    else:
        self.halign = 'left'

Output

Label - Text grow vertically and wraps at a certain width

A Label that can grow vertically but wraps the text at a certain width:

Label:
    size_hint_y: None
    text_size: self.width, None
    height: self.texture_size[1]

To scroll a GridLayout on it’s X-axis/horizontally and Y-axis/vertically, set size_hint property to (None, None).

ScrollView - ScrollEffect, scroll_type, bar_width, etc.

By default, the ScrollView allows scrolling along both the X and Y axes. You can explicitly disable scrolling on an axis by setting the do_scroll_x or do_scroll_y properties to False.

To scroll a GridLayout on it’s Y-axis/vertically, set the child’s width to that of the ScrollView (size_hint_x=1), and set the size_hint_y property to None:

When scrolling would exceed the bounds of the ScrollView, it uses a ScrollEffect to handle the overscroll.

scroll_type

Sets the type of scrolling to use for the content of the scrollview. Available options are: [‘content’], [‘bars’], [‘bars’, ‘content’]

[‘bars’] Content is scrolled by dragging or swiping the scoll bars.

Grid Layout

cols_minimum

Dict of minimum width for each column. The dictionary keys are the column numbers, e.g. 0, 1, 2…

cols_minimum is a DictProperty and defaults to {}.

Snippets

<RV>:
    row_controller: row_controller

    bar_width: 10
    bar_color: 1, 0, 0, 1   # red
    bar_inactive_color: 0, 0, 1, 1   # blue
    effect_cls: "ScrollEffect"
    scroll_type: ['bars']

    data: root.rv_data
    viewclass: 'SelectableButton'

    SelectableRecycleGridLayout:
        id: row_controller
        key_selection: 'selectable'
        cols: root.total_col_headings
        cols_minimum: root.cols_minimum
        default_size: None, dp(26)
        default_size_hint: 1, None
        size_hint: None, None
        height: self.minimum_height
        width: self.minimum_width
        orientation: 'vertical'
        multiselect: True
        touch_multiselect: True

The following example demonstrates:

1. Scrolling of the table header on the X-axis.
2. Support scrolling on the X-axis and Y-axis.
3. Support scrolling on the Y-axis in the Popup window.
4. Works for any columns in database table.
5. Varying column width using GridLayout cols_minimum.
6. Combined two RecycleView into one as there is no need to have a recycleview just for the ID.
7. Selectable buttons.

SQLite Sample Database

chinook SQLite sample database

Example

main.py

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import BooleanProperty, ListProperty, ObjectProperty, NumericProperty, DictProperty

from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.button import Button
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
from kivy.uix.popup import Popup
from kivy.core.window import Window
from kivy.clock import Clock
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.recycleview import RecycleView
import sqlite3 as lite
import re

Window.size = (600, 325)


class PopupLabelCell(Label):
    pass


class EditStatePopup(Popup):

    def __init__(self, obj, **kwargs):
        super(EditStatePopup, self).__init__(**kwargs)
        self.populate_content(obj)

    def populate_content(self, obj):
        for x in range(len(obj.table_header.col_headings)):
            self.container.add_widget(PopupLabelCell(text=obj.table_header.col_headings[x]))
            textinput = TextInput(text=str(obj.row_data[x]))
            if x == 0:
                textinput.readonly = True
            self.container.add_widget(textinput)


class SelectableRecycleGridLayout(FocusBehavior, LayoutSelectionBehavior,
                                  RecycleGridLayout):
    ''' Adds selection and focus behaviour to the view. '''

    selected_row = NumericProperty(0)
    obj = ObjectProperty(None)

    def get_nodes(self):
        nodes = self.get_selectable_nodes()
        if self.nodes_order_reversed:
            nodes = nodes[::-1]
        if not nodes:
            return None, None

        selected = self.selected_nodes
        if not selected:    # nothing selected, select the first
            self.selected_row = 0
            self.select_row(nodes)
            return None, None

        if len(nodes) == 1:     # the only selectable node is selected already
            return None, None

        last = nodes.index(selected[-1])
        self.clear_selection()
        return last, nodes

    def select_next(self, obj):
        ''' Select next row '''
        self.obj = obj
        last, nodes = self.get_nodes()
        if not nodes:
            return

        if last == len(nodes) - 1:
            self.selected_row = nodes[0]
        else:
            self.selected_row = nodes[last + 1]

        self.selected_row += self.obj.total_col_headings
        self.select_row(nodes)

    def select_previous(self, obj):
        ''' Select previous row '''
        self.obj = obj
        last, nodes = self.get_nodes()
        if not nodes:
            return

        if not last:
            self.selected_row = nodes[-1]
        else:
            self.selected_row = nodes[last - 1]

        self.selected_row -= self.obj.total_col_headings
        self.select_row(nodes)

    def select_current(self, obj):
        ''' Select current row '''
        self.obj = obj
        last, nodes = self.get_nodes()
        if not nodes:
            return

        self.select_row(nodes)

    def select_row(self, nodes):
        col = self.obj.rv_data[self.selected_row]['range']
        for x in range(col[0], col[1] + 1):
            self.select_node(nodes[x])


class SelectableButton(RecycleDataViewBehavior, Button):
    ''' Add selection support to the Button '''
    index = None
    selected = BooleanProperty(False)
    selectable = BooleanProperty(True)

    def refresh_view_attrs(self, rv, index, data):
        ''' Catch and handle the view changes '''

        self.index = index
        return super(SelectableButton, self).refresh_view_attrs(rv, index, data)

    def on_touch_down(self, touch):
        ''' Add selection on touch down '''
        if super(SelectableButton, self).on_touch_down(touch):
            return True
        if self.collide_point(*touch.pos) and self.selectable:
            print("on_touch_down: self=", self)
            return self.parent.select_with_touch(self.index, touch)

    def apply_selection(self, rv, index, is_selected):
        ''' Respond to the selection of items in the view. '''
        self.selected = is_selected
        self.text_size = self.size
        if index == rv.data[index]['range'][0]:
            self.halign = 'right'
        else:
            self.halign = 'left'


class HeaderCell(Label):
    pass


class TableHeader(ScrollView):
    """Fixed table header that scrolls x with the data table"""
    header = ObjectProperty(None)
    col_headings = ListProperty([])
    cols_minimum = DictProperty({})

    def __init__(self, **kwargs):
        super(TableHeader, self).__init__(**kwargs)
        self.db = lite.connect('chinook.db')
        self.db_cursor = self.db.cursor()
        self.get_table_column_headings()

    def get_table_column_headings(self):
        self.db_cursor.execute("PRAGMA table_info(customers)")
        col_headings = self.db_cursor.fetchall()

        for col_heading in col_headings:
            data_type = col_heading[2]
            if data_type == "INTEGER":
                self.cols_minimum[col_heading[0]] = 100
            else:
                self.cols_minimum[col_heading[0]] = int(re.findall(r'd+', data_type).pop(0)) * 5
            self.col_headings.append(col_heading[1])
            self.header.add_widget(HeaderCell(text=col_heading[1], width=self.cols_minimum[col_heading[0]]))


class RV(RecycleView):
    row_data = ()
    rv_data = ListProperty([])
    row_controller = ObjectProperty(None)
    total_col_headings = NumericProperty(0)
    cols_minimum = DictProperty({})
    table_header = ObjectProperty(None)

    def __init__(self, table_header, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.table_header = table_header
        self.total_col_headings = len(table_header.col_headings)
        self.cols_minimum = table_header.cols_minimum
        self.database_connection()
        self.get_states()
        Clock.schedule_once(self.set_default_first_row, .0005)
        self._request_keyboard()

    def database_connection(self):
        self.db = lite.connect('chinook.db')
        self.db_cursor = self.db.cursor()

    def _request_keyboard(self):
        self._keyboard = Window.request_keyboard(
            self._keyboard_closed, self, 'text'
        )
        if self._keyboard.widget:
            # If it exists, this widget is a VKeyboard object which you can use
            # to change the keyboard layout.
            pass
        self._keyboard.bind(on_key_down=self._on_keyboard_down)

    def _keyboard_closed(self):
        self._keyboard.unbind(on_key_down=self._on_keyboard_down)
        self._keyboard = None

    def _on_keyboard_down(self, keyboard, keycode, text, modifiers):
        if keycode[1] == 'down':    # keycode[274, 'down'] pressed
            # Respond to keyboard down arrow pressed
            self.display_keystrokes(keyboard, keycode, text, modifiers)
            self.row_controller.select_next(self)

        elif keycode[1] == 'up':    # keycode[273, 'up] pressed
            # Respond to keyboard up arrow pressed
            self.display_keystrokes(keyboard, keycode, text, modifiers)
            self.row_controller.select_previous(self)

        elif len(modifiers) > 0 and modifiers[0] == 'ctrl' and text == 'e':     # ctrl + e pressed
            # Respond to keyboard ctrl + e pressed, and call Popup
            self.display_keystrokes(keyboard, keycode, text, modifiers)
            self.on_keyboard_select()

        # Keycode is composed of an integer + a string
        # If we hit escape, release the keyboard
        if keycode[1] == 'escape':
            keyboard.release()

        # Return True to accept the key. Otherwise, it will be used by
        # the system.
        return True

    def display_keystrokes(self, keyboard, keycode, text, modifiers):
        print("
The key", keycode, "have been pressed")
        print(" - text is %r" % text)
        print(" - modifiers are %r" % modifiers)

    def on_keyboard_select(self):
        ''' Respond to keyboard event to call Popup '''

        # setup row data for Popup
        self.setup_row_data(self.rv_data[self.row_controller.selected_row]['Index'])

        # call Popup
        self.popup_callback()

    def on_mouse_select(self, instance):
        ''' Respond to mouse event to call Popup '''

        if self.row_controller.selected_row != instance.index:
            # Mouse clicked on row is not equal to current selected row
            self.row_controller.selected_row = instance.index

            # Hightlight mouse clicked/selected row
            self.row_controller.select_current(self)

        # setup row data for Popup
        self.setup_row_data(self.rv_data[instance.index]['Index'])

        # call Popup
        self.popup_callback()

        # enable keyboard request
        self._request_keyboard()

    def setup_row_data(self, value):
        self.db_cursor.execute("SELECT * FROM customers WHERE CustomerId=?", value)
        self.row_data = self.db_cursor.fetchone()

    def popup_callback(self):
        ''' Instantiate and Open Popup '''
        popup = EditStatePopup(self)
        popup.open()

    def set_default_first_row(self, dt):
        ''' Set default first row as selected '''
        self.row_controller.select_next(self)

    def get_states(self):
        self.db_cursor.execute("SELECT * FROM customers ORDER BY CustomerId ASC")
        rows = self.db_cursor.fetchall()

        data = []
        low = 0
        high = self.total_col_headings - 1
        for row in rows:
            for i in range(len(row)):
                data.append([row[i], row[0], [low, high]])
            low += self.total_col_headings
            high += self.total_col_headings

        self.rv_data = [{'text': str(x[0]), 'Index': str(x[1]), 'range': x[2], 'selectable': True} for x in data]


class Table(BoxLayout):
    rv = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(Table, self).__init__(**kwargs)
        self.orientation = "vertical"
        self.header = TableHeader()
        self.rv = RV(self.header)

        self.rv.fbind('scroll_x', self.scroll_with_header)

        self.add_widget(self.header)
        self.add_widget(self.rv)

    def scroll_with_header(self, obj, value):
        self.header.scroll_x = value


class MainMenu(BoxLayout):
    states_cities_or_areas = ObjectProperty(None)
    table = ObjectProperty(None)

    def display_states(self):
        self.remove_widgets()
        self.table = Table()
        self.states_cities_or_areas.add_widget(self.table)

    def remove_widgets(self):
        self.states_cities_or_areas.clear_widgets()


class TestApp(App):
    title = "test"

    def build(self):
        return MainMenu()


if __name__ == '__main__':
    TestApp().run()

test.kv

#:kivy 1.10.0

<PopupLabelCell>
    size_hint: (None, None)
    height: 30
    text_size: self.size
    halign: "left"
    valign: "middle"

<EditStatePopup>:
    container: container
    size_hint: None, None
    size: 400, 275
    title_size: 20
    # title_font: "Verdana"
    auto_dismiss: False

    BoxLayout:
        orientation: "vertical"
        ScrollView:
            bar_width: 10
            bar_color: 1, 0, 0, 1   # red
            bar_inactive_color: 0, 0, 1, 1   # blue
            effect_cls: "ScrollEffect"
            scroll_type: ['bars']
            size_hint: (1, None)

            GridLayout:
                id: container
                cols: 2
                row_default_height: 30
                cols_minimum: {0: 100, 1: 300}
                # spacing: 10, 10
                # padding: 20, 20
                size_hint: (None, None)
                height: self.minimum_height

        BoxLayout:
            Button:
                size_hint: 1, 0.2
                text: "Save Changes"
                on_release:
                    root.dismiss()
            Button:
                size_hint: 1, 0.2
                text: "Cancel Changes"
                on_release: root.dismiss()

<SelectableButton>:
    canvas.before:
        Color:
            rgba: (0, 0.517, 0.705, 1) if self.selected else (0, 0.517, 0.705, 1)
        Rectangle:
            pos: self.pos
            size: self.size
    background_color: [1, 0, 0, 1]  if self.selected else [1, 1, 1, 1]  # dark red else dark grey
    on_press: app.root.table.rv.on_mouse_select(self)

<HeaderCell>
    size_hint: (None, None)
    height: 25
    text_size: self.size
    halign: "left"
    valign: "middle"
    background_disabled_normal: ''
    disabled_color: (1, 1, 1, 1)

    canvas.before:
        Color:
            rgba: 1, 0.502, 0, 1
        Rectangle:
            pos: self.pos
            size: self.size

<TableHeader>:
    header: header
    bar_width: 0
    do_scroll: False
    size_hint: (1, None)
    height: 25
    effect_cls: "ScrollEffect"

    GridLayout:
        id: header
        rows: 1
        cols_minimum: root.cols_minimum
        size_hint: (None, None)
        width: self.minimum_width
        height: self.minimum_height

<RV>:
    row_controller: row_controller

    bar_width: 10
    bar_color: 1, 0, 0, 1   # red
    bar_inactive_color: 0, 0, 1, 1   # blue
    effect_cls: "ScrollEffect"
    scroll_type: ['bars']

    data: root.rv_data
    viewclass: 'SelectableButton'

    SelectableRecycleGridLayout:
        id: row_controller
        key_selection: 'selectable'
        cols: root.total_col_headings
        cols_minimum: root.cols_minimum
        default_size: None, dp(26)
        default_size_hint: 1, None
        size_hint: None, None
        height: self.minimum_height
        width: self.minimum_width
        orientation: 'vertical'
        multiselect: True
        touch_multiselect: True


<MenuButton@Button>:
    text_size: self.size
    valign: "middle"
    padding_x: 5
    size : (80,30)
    size_hint : (None, None)
    background_color: 90 , 90, 90, 90
    background_normal: ''
    color: 0, 0.517, 0.705, 1
    border: (0, 10, 0, 0)


<MainMenu>:
    states_cities_or_areas: states_cities_or_areas

    BoxLayout:
        orientation: 'vertical'

        BoxLayout:
            canvas.before:
                Rectangle:
                    pos: self.pos
                    size: self.size

            size_hint_y: 1

            MenuButton:
                id: btn
                text: 'Test'
                size : (60,30)
                on_release: root.display_states()


        BoxLayout:
            canvas.before:
                Rectangle:
                    pos: self.pos
                    size: self.size

                Color:
                    rgb: (1,1,1)

            Label:
                size_hint_x: 45

        BoxLayout:
            id: states_cities_or_areas
            size_hint_y: 10

        Label:
            size_hint_y: 1

Output

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