[ANN] Kivy 1.8.0 released

[Mathieu Virbel]

Hi everyone,

We are pleased to announce Kivy 1.8.0.

Kivy is a full featured framework for creating novel and performant

user interfaces, such as multitouch applications, released under the

MIT license. The framework works on Windows, OSX, Linux, Android and

iOS and RaspberryPi.

This is the first release of Kivy with Python 3.3 and 2.7 support.

All downloads are available on the website:

    http://kivy.org

Main features of this release we want to highlight:

- Python 3.3 support: It's finally here, using the same codebase! And

  we deliver also 3 portables for Windows, one that package Python 2.7

  and another with Python 3.3!

- New media player named GstPlayer, based on Gstreamer 1.0. This

  player is currently used as a implementation for Audio and Video

  core provider. This allow us to not only use the latest Gstreamer

  and all the improvements done by them, but also have a common player

  for both Python 2.7 and 3.3 on desktop platforms.

- Scrollview has been slightly enhanced to support smoother scrolling

  utilizing Matrix transformation by default. It also now supports

  scrolling through bars or content or both.

- Widgets now can be disabled simply by using `disabled` property.

- Textinput now has support for selection handles.

- New Widgets!

  - ActionBar: Mimics Android’s own ActionBar appearance and

    mechanisms

  - Behaviors: ButtonBehavior, ToggleButtonBehavior, DragBehavior,

    just subclass a behavior to an existing widgets, and you get the

    behavior! (eg. class ImageButton(ButtonBehavior, Image))

  - PageLayout: A simple multi-page layout allowing flipping through

    pages using borders

  - SandBox (experimental): Runs itself and its children in an

    exception-catching sandbox

Changelog - 1.8.0

=================

- Python 3.3 compatibility

Core

----

  - [#1631] Extend core_select_lib to be used for other libs other

    than just kivy.core

  - [#1678] Gracefully exit if no core provider is found

  - [#1740] Dynamically lookup the class when a string is set for

    various widget with _cls properties

  Audio

  - [#1196] Fix sound looping issues

  - [#1209] Fix audio issues on iOS

  - [#1311, #1269] Fix volume property

  - New GstPlayer backend

  Camera

  - [#1369, #1053, #65] New avfoundation Camera provider for Mac OSX

  Clipboard

  - Introduce native clipboard provider for Android

  - Add only the correct provider depending on the platform

  Image

  - [#1696] Improve reload of images on context reload

  - [#1809] Use resource_find to load images

  - Image/texture: add `flipped` parameter for `save` method

  Text

  - [#1186] Various fixes for managing proper GL reload on GL context

    change

  - [#1274] Fix unicode handling in shorten routine

  - [#1334] Make shorten work with single words

  - [#1376] Label: add `max_lines` to limit the number of lines

    rendered in a label

  - [#796] Pygame provider: Try to use ftfont before font

  - Fix for handling unicode font names

  Video

  - [#1490] Fix detection or uri

  - Introduce GstPlayer backend replacing pygst and pygi

  - Make sure video stop and play works on Windows

  Window

  - [#1253] Change default clearcolor to (0, 0, 0, 1)

  - [#1408] Avoid multiple binding to keyboard

  - [#1455, #1711] Improve screenshot method

  - [#1667] Fix bad-looking icon on Windows 7

  - [#1830] X11 window provider improvements. Introduction of

    KIVY_WINDOW_ABOVE and NETWM_PID

  - Fix handling of escape key

Base

----

  App

  - [#1233] Fix title change not reflecting on ui after `build`

  - [#1546] Raise a default exception when app.root is not of type

    `Widget`

  - Adds new methods to display/configure Settings panel

  - New properties for configuring Kv file search

  - Changed to consistently use Properties for configuration

  Animation

  - [#1547, #1682] Avoid duration=0 animations from crashing the app

  - Fix leak caused by cancel() not releasing widget reference

  Atlas

  - [#1285] Allow generation of an atlas with path info in the ids

    from the command line

  - Update command line to allow padding and size specification with

    "WIDTHxHEIGHT"

  Config

  - Various fixes for default values on Windows and Linux.

  - [#1084] Fix for allowing unicode string / path in Settings

  - [#1537] Add option to not exit app on escape

  Clock

  - New properties for tracking frame time

  - Introduce @mainthread decorator for working with threads

  - Allow clock events to be canceled, utilizing `cancel` method

  EventDispatcher

  - [#1315] Make sure disabling multi-touch emulation works

  - [#1335] Fix touch ring persistence when using multiple virtual

    keyboards

  - [#1338] Reverse the order of dispatching event stack

  - Introduce `events` and `get_property observers()` method that

    returns a dict of properties/events and a list of methods that are

    bound to them

  Factory

  - [#1223] Allow unregistering of widgets

  - [#1726, #1729, #1277] Raise appropriate error when trying to

    access a non-existent class

  Gesture

  - [#1790] Use BytesIO for internal encoding/compression instead of

    StringIO

  Graphics

  - [#1199] Fix Python Bindings

  - [#1337] Allow graphics instructions to be animated

  - [#1345] Allow 3D picking

  - [#1393] Texture fix repeating texture loss while GL context reload

  - [#1422] FBO use memoryview instead of buffer

  - [#1488] Added VBO support for glDrawElements and glVertexAttribute

  - [#1529] Ellipse - Faster algorithm when drawing circle

  - [#1551] Introduce segment_intersection

  - [#1671] Support member for origin in rotate constructor

  - [#1723] Use ctypes to display a dialog on win32 instead of win32ui

  - [#955] Correctly deallocate shader sources

  - Force npot texture allocation with GPUs that only support npot

  - Shaders: Fix loss of precision that breaks rendering

  - Shaders: Support array

  Lang

  - [#1028, #1734, #302] Allow app.kv_directory to work

  - [#1234] Use resource_find to find the filename

  - [#1388] Fix various memory leaks

  - [#1519] Instead of creating an ObjectProperty for every new

    property declared in Kv lang, detect it’s type and instantiate

    relevant Numeric/String/List/DictProperty

  - [#991] Add warning if Kv file is loaded multiple times

  - Allow `_` to be checked as if it was a key.value property

  Logger

  - [#1721] Python3 compatibility fixes

  - [#825] Ensure arguments to the logger are strings

  - Force logging.root to use Kivy Logger instance. Fixes infinite

    loop

  Network

  - [#1248] Introduce `decode` property. Makes decoding optional

  - [1316, #1224, #1221, #1286] UrlRequest: various improvements

  - [#1457] Make sure parameters aren’t removed

  - [#1719] OSC: Fix usage for client

  - Introduce `file_path` argument

  Properties

  - [#1243] Make BoundedNumeric Property more accurate

  - [#1389] Allow individual elements of ReferenceListProperty to be

    changed

  - [#1468] Stop DictProperty from deleting key if value is None

  - Introduce `VariableListProperty`

  - Properly return result in ObservableDict.setdefault

Input

-----

  - [#1119] Fix touch offset on various touch screen hardware

  - [#1489] New input provider for Leap Motion

  - Add support for tuio/2dblb(CCV 15)

  - Introduce MotionEvent.`last__motion_event`

  PostProc

  - [#1204] Fix double tap and triple tap detection

  - [#1348] Fix double and triple tap detection on Windows

Modules

-------

  - [#1668] Add late configuration if module has been added manually

    before the window creation

  Inspector

  - [#1549, #1684] Fix inspection of elements in popup. by looking at

    ModalView before other elements

  - [#1361, #1365] Allow position of inspector to be adjustable

  Recorder

  - [#1800] Introduce `F6` shortcut to play last record in a loop

  Screen

  - [#1448] Add support for scale

  - [#1687, #1686] Fix all resolutions to be landscape

  - Remove 25dp from height to simulate the Android systemui bar

  WebDebugger

  - [#1819] WebDebugger: Display instant value of each box

Widgets

-------

  - [#1238] PageLayout: A simple multi-page layout allowing flipping

    through pages using borders

  - [#1264] ActionBar: Mimics Android’s own ActionBar appearance and

    mechanisms

  - [#1471] Behaviors: ButtonBehavior, ToggleButtonBehavior

    ,DragBehavior

  - SandBox (experimental): Runs itself and its children in an

    exception-catching sandbox

  Accordion

  - [#1249] Stop empty accordion from accessing it’s first child

  - [#1340] Fix select method

  Bubble

  - [#1273] Honor `arrow_pos` when passed as a arg in constructor.

  - Introduce`show_arrow` property

  Button

  - [#1212] Introduce `trigger_action()` for triggering the button

    programmatically

  Carousel

  - Introduce `load_slide` method to animate the provided slide in/out

  - Introduce `anim_type` property to be able to choose the type of

    animation

  CheckBox

  - [#1695] Fix active state in group

  CodeInput

  - Minor rendering fixes

  - Use MonoSpace font by default

  Dropdown

  - Delay container binding, allow it to be used in Kv

  - [#1450] Introduce `on_dismiss` event

  - Pressing escape when dropdown is active now dismisses the dropdown

  - Make auto-dismiss of dropdown optional. Introduces `auto_dismiss`

    property

  FileChooser

  - [#1476] Fix inability to browse up to the root path

  - [#1758] Prevent infinite loop

  - [#1780] Fix incorrect selections caused by touch offset

  - [#1818, #1829] Fix unicode issues. Now, path defaults to a unicode

    string

  - Abstracted filesystem access

  - If a path is expected to contain non unicode-decodable characters,

    a bytes path string should be used. Otherwise, unicode paths are

    preferred

  Image

  - [#1561] Don’t crash if an invalid image is loaded

  ListView

  - [#1303, #1304] Set ListItemButton background_color

  - [#1396, #1397] Accepts objects inheriting from list or tuple in

    SimpleListAdaptor

  - [#1788] Fix None, int comparison

  Popup

  - Introduce `title_color` property

  Progressbar

  - Avoid dev/zero when max is zero

  RstDoc

  - Introduce `background_color` property

  Scatter

  - [#1459] Minor fixes for scaling

  - [#1797] Fix div by 0 issue where touch itself was chosen as anchor

  - [#947] Fix scale being dispatched again due to error in floating

    point calculation

  - Various fixes for transformation

  ScreenManager

  - [#1750] Add NoTransition transition

  - [#573, #1045] Introduce `switch_to` method fixes for

  - Fix Shader-based transitions, allowing them to work in

    non-fullscreen mode

  - New Screen transitions, mimicking Android

  - Reduce default transition duration and set default transition to

    SlideTransition

  - Set clear color to be transparent

  ScrollView

  - [#1387] Show scrollbars only when viewport is scrollable

  - [#1463] Refactor kinect constants

  - [#1478, #1567] Introduce bars scrolling for desktop type behavior

  - [#1604] Fix overscroll on low FPS

  - Accelerated scrolling by default using Matrix instead of moving

    the child

  - Introduce `bar_pos`, `bar_side_x` and `bar_side_y` properties

    allowing the user to control where the the bars are displayed

  - Introduce `scroll_wheel_distance` property

  Slider, Spinner

  - DPI fixes making the widget aware of screen metrics

  Splitter

  - [#1655, #1658] Make double tap on border alternate between max/min

    size

  - [#1656, #1672, #1673, #1810, #1812] Miscellaneous fixes

  - [#1657] Don’t allow negative sizes

  - Make sure splitter remains between min/max_size when these

    properties are changing

  Settings

  - [#1228] Fix for allowing unicode path

  - [#1556] Made SettingsString textinput scale independent

  - [#1590] Prevent import of SettingsWithSpinner when custom class is

    used

  - Fixes for SettingsPanel that allows it to adjust to mobile screens

  - Fix handling of numeric input

  - Made various behaviors (settings popups, fonts) more scale

    independent

  - Make the default tab active in SettingsWithTabbedPanel

  - Now includes different Settings widgets, suitable for different

    devices

  StackLayout

  - [#1390] Simply `do_layout`

  TabbedPanel

  - [#1402] Introduce `strip_image` and `strip_border` properties to

    allow skinning the TabbedPanelStrip

  - [#1799] Honor index while inserting TabbedPanelHeader

  - Fix bug when selected tab is removed before switching to it

  TextInput

  - [#1496] Introduce `allow_copy`,  to allow the user to choose

    whether Textinput allows copy or not

  - [#1632, #1717] Fixes for selection offset issues

  - [#1639, #1500] Make sure cursor remains inside TextInput

  - [#1647] Introduction of  Handles for selection on mobile enabled

    by `use_handles`property

  - [#1697] Introduce `Keyboard_mode` to allow custom management of

    keyboard

  - [#1702] `copy`, `cut`, `paste` methods to allow the user to manage

    clipboard operations

  - [#1774] Fixes for voice input

  - Introduce `line_spacing`

  - Introduce `minimum_height` property to be used in conjunction with

    scrollview

  - Introduction of `input_type` property that is used to specify the

    kind of IME to request from the OS

  - Introduction of `keyboard_suggestion` allowing native keyboards on

    Android to show word suggestions

  - Various fixes for cut/copy/paste

  - Various `Unicode` fixes. Textinput now maintains a unicode

    sandwich

  Videoplayer

  - [#1275] Fix looping

  - [#1823] Ensure vdeo is loaded before loading the state

  Vkeyboard

  - [#958] Fix custom layout usage

  - [#1333] Don’t dispatch touch to other widgets while moving

  - [#1404] Introduce dual keyboard mode `systemanddock`and

    `systemandmulti`

  - `Layout` property can directly point to a JSON file name now

  Widget

  - [#1209] Introduce `disabled` property

  - [#1452] Add children= argument to clear_widgets()

Platforms

---------

  RaspberryPi

  - [#1241] Fix installation of vidcore_lite for RPi

  - Add support for “relative” hid input as mouse

  - Fix configuration generation, and fix hidinput provider for

    multitouch hardware

  - Introduce new window provider specifically for RPi

Tools

-----

  - [#1352] Improvements to highlighting file for emacs

  - [#1527, #1538] Move Kivy Garden to it’s own repository

  - [#1807] support for using hidinput to display mouse cursor

  - Make Garden Tool Python 3 compatible

Doc

---

  - Tons of doc fixes thanks to the awesome community

  - Special Thanks to ZenCODE for his awesome work on improving the

    doc

Examples

--------

  - Various redesign, fixes and improvements making examples fit

    better on mobile

  - New Kivy Showcase, designed to fit much better on mobile devices

  - New `Take Picture` example to demonstrate how to use

    startActivtyForResult and how to get the result with

    python-for-android android.activity module

  - Rework compass example to work with py4a and remove all broken

    code

Unit Tests

----------

  - [#1226] New test for testing unicode font names

  - [#1544] Add unit tests for Vector class

  - [#1828] Unicode Filechooser tests

  - [#823] Add test case for issue

  - Improve tests with new proxy_ref

  - Various tests introduced to test Python3 port

Packaging

---------

  - Tons of fixes and new packages for Python 3

  - [#1540] Various fixes for Windows launcher

  - [#1599] Various fixes for installation on 32 bit Mac OSX

Tons of more fixes that weren’t mentioned here, details of which can

be gathered from http://github.com/kivy/kivy

Migration

=========

Kv leaks

--------

Thanks to the community, more fixes are included in 1.8.  Some fixes

were already pushed in the stable version, change is that `id` in the

KV language and `ids` in Python don't use direct-referencing to

widgets anymore.

We are working on eliminating leaks when using the Kv language under

Have a look at this code::

    <CustomWidget>:

        layout: myboxlayout

        BoxLayout:

            id: myboxlayout

The CustomWidget.layout is an ObjectProperty, and before 1.8.0

we were assigning a direct reference of the BoxLayout to the layout

property. Such a loop would not get garbage collected correctly.

Now, the same code will assign a weak-reference instead of the

direct reference.

What's the difference ?

    cw = CustomWidget()

    # at this point, the BoxLayout instance is referenced twice:

    # 1. one direct reference in cw.children, and

    # 2. one weak-reference in cw.layout

    cw.remove_widget(cw.layout)

    # now, there is no direct reference to the boxlayout anymore.

    # cw.layout is now a dead weak-reference.

If you want a direct reference no matter what, use Widget.__self__

(id.__self__ in this example). If you want a weak-reference of a widget,

use Widget.proxy_ref (simply id, in this example). In this

example, if you want to be able to remove it without losing the

boxlayout, do::

    <CustomWidget>:

        layout: myboxlayout.__self__

        BoxLayout:

            id: myboxlayout

Please note that accessing the weak-reference of a widget or direct

reference is the same.

We hope this will not cause you too much trouble :)

Branching

---------

The new stable branch is now derivated from 1.8.0 tag. The oldest

stable branch have been renamed to stable-1.7.x. If you still want to

compile on android with this branch, use "kivy==stable-1.7.x" as

requirement. We do not give support for previous version, so if things

doesn't work anymore because we enhance python-for-android as well,

please take time to update your application.

Thanks

======

A big thanks to all of the Contributors, especially those github

usernames mentioned here:

Aaron1011, abhijhangda bob-the-hamster, rogererens, jboy, sky,

ire-and-curses, okr, ivpusic, KristerV,  robertour, filssavi, encukou,

peristeri, audreyer, nskrypnik, dkmadigan, RenWenshan, jegger,

rentouch, blarghmatey, G.Tjebbes, eulerreich, rtsh, prtksxna,

intchanter, pkor, aspidites, eventh, Karl Sander, ilfirin-ms, dgym,

chozabu, voen, wesix, vernondcole, akloster, MiyamotoAkira, gitshub,

dami0, mid-kid, karlsander, aklloster, remip, alanjds, Zachary

Spector, LogicalDash, Nexc, M. Dietrich, Edoardo Spadoni, Martin,

Thopiekar, emdete, edoz78, tohin, lqez, Jeff Kries, k4rtik, b3ni.

Hope we mentioned them all.

Special thanks to Ian Foote (Quartic), Richard Larkin (ZenCODE),

Alexander Taylor (inclement), Ben Rousch (brousch), Matthew Einhorn

(matham) for this release!

--

Kivy Team

http://kivy.org/#aboutus

[Mathieu Virbel]

Not yet, but this is the next logical step :)

Le samedi 1 février 2014 08:29:56 UTC+1, Olli Wang a écrit :

Nice job. Does Python 3 support also work on kivy-ios and python-for-android?

[Mathieu Virbel]

Hi,

I just read about your widget.center concerns. This exists already from a long time, as git annotate tell me:

fc6f5757        (Mathieu Virbel 2010-11-06 16:10:56 -0400       693)    center = ReferenceListProperty(center_x, center_y)

The thing is, instead of returning a pure tuple, yes it returns an ObservableReferenceList. But the behavior is the same as before you know, nothing changed on this side. On all the previous release, if you change pos/size, center would change as well. If you stored something in center, it would update the pos as well.

So i don't really understand your concerns :)

Mathieu

2014-02-17 16:17 GMT+01:00 DMB <bastos...@gmail.com>:

Hi,

Just noting that you have changed widget.center to an ObservablePropertyList and have potentially broken every app that was storing previous values of widget's center positions since they are now changed when widget.center changes.

On kivy 1.7:

       whatever = widget.center
       widget.center = (123, 456)
       # whatever is unchanged

On kivy 1.8:

      whatever = widget.center
      widget.center = (123, 456)
      # whatever is now (123, 456) potentially breaking all code that was expecting whatever to be unchanged

Was this intended? 

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[qua-non]

Just a heads up for every-one the following change:

 [#1389] Allow individual elements of ReferenceListProperty to be

    changed

Changed the return type from a tuple to a ObservableReferenceList.

Due to this change the properties like widget.center that used this will

now behave like most other properties in kivy.

On kivy 1.7:

       whatever = widget.center

       widget.center = (123, 456)

       # whatever is unchanged

On kivy 1.8:

      whatever = widget.center

      widget.center = (123, 456)

      # whatever is now (123, 456)

Thanks to Diogo Bostos for highlighting this.

[Bill Janssen]

The new camera support on OS X doesn't seem to work on my machine.

Darwin 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:26:45 PDT 2012; root:xnu-1699.32.7~1/RELEASE_I386 i386

See https://groups.google.com/forum/#!topic/kivy-users/yctpFqOgmCc for details.

Bill

[Carlos Choy]

I am using the Kivy virtual machine version.

How do I safely upgrade to this latest version in my virtual machine?