kivyblocks

KivyBlocks

Can you ever image build a gui application like play Lego blocks? kivyblocks just try to provide programmer a tool to build a application like play lego blocks

kivyblocks base on the python package 'kivy', which is a cross platform GUI package and can play on window, linux, mac OS x, android and iphone

Requirement

appPublic kivycalendar kivy ... see the requirements.txt

Principle

There is a BlocksApp(inherited from App) in kivyblocks contains a all widgets can be created by Blocks, and the Blocks creates widgets according a customized json data, the data can download from application server or local filesystem. The Customized json data has it own format to descript the UI and it's interaction. please see the "Customized json data" section for further information.

installation

pip install git+https://github.com/yumoqing/kivyblocks

Use above command to install the newest version of kivyblocks

How to use

see the simple example below:

import sys
import os
from appPublic.folderUtils import ProgramPath
from appPublic.jsonConfig import getConfig

from kivyblocks.blocksapp import BlocksApp
from kivyblocks.blocks import Blocks

class TestApp(BlocksApp):
	def build(self):
		b = super(TestApp, self).build()
		widget_desc = {
			"widgettype":"VBox",
			"options":{},
			"subwidgets":[
				{
					"widgettype":"Title1",
					"options":{
						"otext":"Say Hello",
						"i18n":True,
						"size_hint_y":None,
						"height":"py::CSize(2)"
					}
				},
				{
					"widgettype":"Text",
					"options":{
						"i18n":True,
						"otext":"Hello KivyBlocks"
					}
				}
			]
		}
		blocks = Blocks()
		x = blocks.widgetBuild(widget_desc)
		return x

if __name__ == '__main__':
	pp = ProgramPath()
	workdir = pp
	if len(sys.argv) > 1:
		workdir = sys.argv[1]
	print('ProgramPath=',pp,'workdir=',workdir)

	config = getConfig(workdir,NS={'workdir':workdir,'ProgramPath':pp})
	myapp = TestApp()
	myapp.run()

if you running it on window, it will show the following:

BlocksApp

inherited from kivy.app.App, for kivyblocks, it get root widget description dictionary from kivyblocks app's json configuration file, and uses Blocks to build the app's root widget.

Blocks

A class to constructs all the GUI Widgets in kivyblocks from a widget description dictionary, The Blocks class is register in kivy.factory.Factory, so you can get Blocks class use following script:

from kivy.factory import Factory

Blocks = Factory.Blocks

getWidgetById get widget by id

Syntax

getWidgetById(id:str, from_widget:Widget) -> Widget

Description

getWidgetById find the widget identified by "id", the widgets can be found, cause it have a "id" attribute in the widget description dictionary.

Use Case

get app

app = Factory.Blocks.getWidgetById('app')

get root widget

root = Factory.blocks.getWidgetById('root')

get Window

w = Factory.Blocks.getWidgetById('Window')

find app.root descendant widget with widget_id is 'myid'

Factory.Blocks.getWidgetById('root.myid')

find specified widget's descendant widget

from_w = Factory.Blocks.getWidgetById('root.one_id')
w = Factory.Blocks.getWidgetById('mychild', from_widget=from_w)

find a widget, widget_id is 'descendant' which has a ancester widget_id is 'myancester' and it is from_widget widget's ancester.

from_w = Factory.Blocks.getWidgetById('root.one_id')
w = Factory.Blocks.getWidgetById('-myancester.descendant', from_widget=from_w)

getWidgetById(id:str, from_widget:Widget) -> Widget

Arguments:

• id a '.' splited string, each part must be a widget_id in the widget tree if id part is start with a '-', it mean to find widget upward, else it find widget downward

• from_widget, default is None, it mean find widget from app.root

Return

if widget found, return the found widget, else return None

widgetBuild()

Syntax

x = widgetBuild(desc)

Use Case

Arguments

• desc widget description dictionary(wdd), it has the following attributes: ** widgettype A string, the name of widget class registered by kivyblocks into kviy.factory.Factory ** options A dictionary, it is the **kwargs argument of init() method of the class ** subwidgets: a list, contains one or more wdd or id, when wdd mean widget description dictionary, and string mean the id can be find with Factory.Blocks.getWidgetById() ** binds a list of dictionary, each items bind a event to a action or actions for further information, please read use case of this function

** any other attributes will be handle like a wdd, use to build a widget and the attributes key will be the attribute name of the class instance.

Return

if success, return the widget, else return None

Registered class

Hierarchy

Menu

DataGrid

Toolbar

PagePanel

ToolPage

Form

Charts

Video

FFVideo

CircleProgress

BlocksTest

DefaultImage

CommandBox

Text

TinyText

PriceView

SingleCheckBox

ClickableBox

ClickableText

ClickableIconText

ToggleText

ToggleIconText

ClickableImage

ToggleImage

CircleProgress

PyInterpreter

UploadFile

FFVideo

AnchorBox

FloatBox

RelativeBox

GridBox

PageBox

ScatterBox

StackBox

DateInput

HTTPSeriesData

HTTPDataHandler

PageLoader

UdpWidget

ScrollPanel

TextInput

CameraWithMic

CustomCamera

QrReader

Markdown

PagePanel

Conform

Popup

MapView

DataGrid

FileLoaderBrowser

KivyCamera

QRCodeWidget

TabsPanel

TwoSides

PageContainer

BoxViewer

Form

StrSearchForm

VPlayer

DataGrid

Toolbar

ToolPage

HTTPDataHandler

Text

ScrollWidget

BinStateImage

JsonCodeInput

FloatInput

IntegerInput

StrInput

SelectInput

BoolInput

Messager

LoginForm

PressableImage

PressableLabel

Tree

TextTree

MenuTree

PopupMenu

HostImage

APlayer

WrapText

PressableBox

Title1

Title2

Title3

Title4

Title5

Title6

Modal

TimedModal

HBox

VBox

SwipeBox

ToggleItems

ExAccordion

Slider

PhoneButton

AWebView

Documents

中文文档 English

references

Build app for android please see Buildozer kivy introduct and API please see kivy

Changelog

changelog