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Source code for kivy.core.window

# pylint: disable=W0611
'''
Window
======

Core class for creating the default Kivy window. Kivy supports only one window
per application: please don't try to create more than one.
'''

__all__ = ('Keyboard', 'WindowBase', 'Window')

from os.path import join, exists
from os import getcwd

from kivy.core import core_select_lib
from kivy.clock import Clock
from kivy.config import Config
from kivy.logger import Logger
from kivy.base import EventLoop
from kivy.modules import Modules
from kivy.event import EventDispatcher
from kivy.properties import ListProperty, ObjectProperty, AliasProperty, \
    NumericProperty, OptionProperty, StringProperty
from kivy.utils import platform, reify
from kivy.context import get_current_context

# late import
VKeyboard = None


[docs]class Keyboard(EventDispatcher): '''Keyboard interface that is returned by :meth:`WindowBase.request_keyboard`. When you request a keyboard, you'll get an instance of this class. Whatever the keyboard input is (system or virtual keyboard), you'll receive events through this instance. :Events: `on_key_down`: keycode, text, modifiers Fired when a new key is pressed down `on_key_up`: keycode Fired when a key is released (up) Here is an example of how to request a Keyboard in accordance with the current configuration: .. include:: ../../examples/widgets/keyboardlistener.py :literal: ''' # Keycodes mapping, between str <-> int. Theses keycode are # currently taken from pygame.key. But when a new provider will be # used, it must do the translation to theses keycodes too. keycodes = { # specials keys 'backspace': 8, 'tab': 9, 'enter': 13, 'shift': 304, 'ctrl': 306, 'capslock': 301, 'escape': 27, 'spacebar': 32, 'pageup': 280, 'pagedown': 281, 'end': 279, 'home': 278, 'left': 276, 'up': 273, 'right': 275, 'down': 274, 'insert': 277, 'delete': 127, 'numlock': 300, 'screenlock': 145, 'pause': 19, # a-z keys 'a': 97, 'b': 98, 'c': 99, 'd': 100, 'e': 101, 'f': 102, 'g': 103, 'h': 104, 'i': 105, 'j': 106, 'k': 107, 'l': 108, 'm': 109, 'n': 110, 'o': 111, 'p': 112, 'q': 113, 'r': 114, 's': 115, 't': 116, 'u': 117, 'v': 118, 'w': 119, 'x': 120, 'y': 121, 'z': 122, # 0-9 keys '0': 48, '1': 49, '2': 50, '3': 51, '4': 52, '5': 53, '6': 54, '7': 55, '8': 56, '9': 57, # numpad 'numpad0': 256, 'numpad1': 257, 'numpad2': 258, 'numpad3': 259, 'numpad4': 260, 'numpad5': 261, 'numpad6': 262, 'numpad7': 263, 'numpad8': 264, 'numpad9': 265, 'numpaddecimal': 266, 'numpaddivide': 267, 'numpadmul': 268, 'numpadsubstract': 269, 'numpadadd': 270, # F1-15 'f1': 282, 'f2': 283, 'f3': 282, 'f4': 285, 'f5': 286, 'f6': 287, 'f7': 288, 'f8': 289, 'f9': 290, 'f10': 291, 'f11': 292, 'f12': 293, 'f13': 294, 'f14': 295, 'f15': 296, # other keys '(': 40, ')': 41, '[': 91, ']': 93, '{': 91, '}': 93, ':': 59, ';': 59, '=': 43, '+': 43, '-': 41, '_': 41, '/': 47, '?': 47, '`': 96, '~': 96, '\\': 92, '|': 92, '"': 34, '\'': 39, ',': 44, '.': 46, '<': 60, '>': 60, } __events__ = ('on_key_down', 'on_key_up') def __init__(self, **kwargs): super(Keyboard, self).__init__() #: Window which the keyboard is attached too self.window = kwargs.get('window', None) #: Callback that will be called when the keyboard is released self.callback = kwargs.get('callback', None) #: Target that have requested the keyboard self.target = kwargs.get('target', None) #: VKeyboard widget, if allowed by the configuration self.widget = kwargs.get('widget', None) def on_key_down(self, keycode, text, modifiers): pass def on_key_up(self, keycode): pass
[docs] def release(self): '''Call this method to release the current keyboard. This will ensure that the keyboard is no longer attached to your callback.''' if self.window: self.window.release_keyboard(self.target)
def _on_window_key_down(self, instance, keycode, scancode, text, modifiers): keycode = (keycode, self.keycode_to_string(keycode)) return self.dispatch('on_key_down', keycode, text, modifiers) def _on_window_key_up(self, instance, keycode, *largs): keycode = (keycode, self.keycode_to_string(keycode)) return self.dispatch('on_key_up', keycode) def _on_vkeyboard_key_down(self, instance, keycode, text, modifiers): if keycode is None: keycode = text.lower() keycode = (self.string_to_keycode(keycode), keycode) return self.dispatch('on_key_down', keycode, text, modifiers) def _on_vkeyboard_key_up(self, instance, keycode, text, modifiers): if keycode is None: keycode = text keycode = (self.string_to_keycode(keycode), keycode) return self.dispatch('on_key_up', keycode)
[docs] def string_to_keycode(self, value): '''Convert a string to a keycode number according to the :attr:`Keyboard.keycodes`. If the value is not found in the keycodes, it will return -1. ''' return Keyboard.keycodes.get(value, -1)
[docs] def keycode_to_string(self, value): '''Convert a keycode number to a string according to the :attr:`Keyboard.keycodes`. If the value is not found in the keycodes, it will return ''. ''' keycodes = list(Keyboard.keycodes.values()) if value in keycodes: return list(Keyboard.keycodes.keys())[keycodes.index(value)] return ''
[docs]class WindowBase(EventDispatcher): '''WindowBase is an abstract window widget for any window implementation. :Parameters: `fullscreen`: str, one of ('0', '1', 'auto', 'fake') Make the window fullscreen. Check the :mod:`~kivy.config` documentation for a more detailed explanation on the values. `width`: int Width of the window. `height`: int Height of the window. :Events: `on_motion`: etype, motionevent Fired when a new :class:`~kivy.input.motionevent.MotionEvent` is dispatched `on_touch_down`: Fired when a new touch event is initiated. `on_touch_move`: Fired when an existing touch event changes location. `on_touch_up`: Fired when an existing touch event is terminated. `on_draw`: Fired when the :class:`Window` is being drawn. `on_flip`: Fired when the :class:`Window` GL surface is being flipped. `on_rotate`: rotation Fired when the :class:`Window` is being rotated. `on_close`: Fired when the :class:`Window` is closed. `on_keyboard`: key, scancode, codepoint, modifier Fired when the keyboard is used for input. .. versionchanged:: 1.3.0 The *unicode* parameter has been deprecated in favor of codepoint, and will be removed completely in future versions. `on_key_down`: key, scancode, codepoint Fired when a key pressed. .. versionchanged:: 1.3.0 The *unicode* parameter has been deprecated in favor of codepoint, and will be removed completely in future versions. `on_key_up`: key, scancode, codepoint Fired when a key is released. .. versionchanged:: 1.3.0 The *unicode* parameter has be deprecated in favor of codepoint, and will be removed completely in future versions. `on_dropfile`: str Fired when a file is dropped on the application. ''' __instance = None __initialized = False # private properties _size = ListProperty([0, 0]) _modifiers = ListProperty([]) _rotation = NumericProperty(0) _clearcolor = ObjectProperty([0, 0, 0, 1]) children = ListProperty([]) '''List of the children of this window. :attr:`children` is a :class:`~kivy.properties.ListProperty` instance and defaults to an empty list. Use :meth:`add_widget` and :meth:`remove_widget` to manipulate the list of children. Don't manipulate the list directly unless you know what you are doing. ''' parent = ObjectProperty(None, allownone=True) '''Parent of this window. :attr:`parent` is a :class:`~kivy.properties.ObjectProperty` instance and defaults to None. When created, the parent is set to the window itself. You must take care of it if you are doing a recursive check. ''' icon = StringProperty() def _get_modifiers(self): return self._modifiers modifiers = AliasProperty(_get_modifiers, None) '''List of keyboard modifiers currently active. ''' def _get_size(self): r = self._rotation w, h = self._size if r in (0, 180): return w, h return h, w def _set_size(self, size): if self._size != size: r = self._rotation if r in (0, 180): self._size = size else: self._size = size[1], size[0] self.dispatch('on_resize', *size) return True else: return False size = AliasProperty(_get_size, _set_size, bind=('_size', )) '''Get the rotated size of the window. If :attr:`rotation` is set, then the size will change to reflect the rotation. ''' def _get_clearcolor(self): return self._clearcolor def _set_clearcolor(self, value): if value is not None: if type(value) not in (list, tuple): raise Exception('Clearcolor must be a list or tuple') if len(value) != 4: raise Exception('Clearcolor must contain 4 values') self._clearcolor = value clearcolor = AliasProperty(_get_clearcolor, _set_clearcolor, bind=('_clearcolor', )) '''Color used to clear the window. :: from kivy.core.window import Window # red background color Window.clearcolor = (1, 0, 0, 1) # don't clear background at all Window.clearcolor = None .. versionchanged:: 1.7.2 The clearcolor default value is now: (0, 0, 0, 1). ''' # make some property read-only def _get_width(self): r = self._rotation if r == 0 or r == 180: return self._size[0] return self._size[1] width = AliasProperty(_get_width, None, bind=('_rotation', '_size')) '''Rotated window width. :attr:`width` is a :class:`~kivy.properties.AliasProperty`. ''' def _get_height(self): '''Rotated window height''' r = self._rotation if r == 0 or r == 180: return self._size[1] return self._size[0] height = AliasProperty(_get_height, None, bind=('_rotation', '_size')) '''Rotated window height. :attr:`height` is a :class:`~kivy.properties.AliasProperty`. ''' def _get_center(self): return self.width / 2., self.height / 2. center = AliasProperty(_get_center, None, bind=('width', 'height')) '''Center of the rotated window. :attr:`center` is a :class:`~kivy.properties.AliasProperty`. ''' def _get_rotation(self): return self._rotation def _set_rotation(self, x): x = int(x % 360) if x == self._rotation: return if x not in (0, 90, 180, 270): raise ValueError('can rotate only 0, 90, 180, 270 degrees') self._rotation = x if self.initialized is False: return self.dispatch('on_resize', *self.size) self.dispatch('on_rotate', x) rotation = AliasProperty(_get_rotation, _set_rotation, bind=('_rotation', )) '''Get/set the window content rotation. Can be one of 0, 90, 180, 270 degrees. ''' def _set_system_size(self, size): self._size = size def _get_system_size(self): return self._size system_size = AliasProperty( _get_system_size, _set_system_size, bind=('_size', )) '''Real size of the window ignoring rotation. ''' fullscreen = OptionProperty(False, options=(True, False, 'auto', 'fake')) '''If True, the window will be put in fullscreen mode, "auto". That means the screen size will not change and will use the current size to set the app fullscreen. .. versionadded:: 1.2.0 ''' mouse_pos = ObjectProperty([0, 0]) '''2d position of the mouse within the window. .. versionadded:: 1.2.0 ''' top = NumericProperty(None, allownone=True) left = NumericProperty(None, allownone=True) position = OptionProperty('auto', options=['auto', 'custom']) render_context = ObjectProperty(None) canvas = ObjectProperty(None) title = StringProperty('Kivy') __events__ = ('on_draw', 'on_flip', 'on_rotate', 'on_resize', 'on_close', 'on_motion', 'on_touch_down', 'on_touch_move', 'on_touch_up', 'on_mouse_down', 'on_mouse_move', 'on_mouse_up', 'on_keyboard', 'on_key_down', 'on_key_up', 'on_dropfile') def __new__(cls, **kwargs): if cls.__instance is None: cls.__instance = EventDispatcher.__new__(cls) return cls.__instance def __init__(self, **kwargs): kwargs.setdefault('force', False) # don't init window 2 times, # except if force is specified if WindowBase.__instance is not None and not kwargs.get('force'): return self.initialized = False # create a trigger for update/create the window when one of window # property changes self.trigger_create_window = Clock.create_trigger( self.create_window, -1) # set the default window parameter according to the configuration if 'fullscreen' not in kwargs: fullscreen = Config.get('graphics', 'fullscreen') if fullscreen not in ('auto', 'fake'): fullscreen = fullscreen.lower() in ('true', '1', 'yes', 'yup') kwargs['fullscreen'] = fullscreen if 'width' not in kwargs: kwargs['width'] = Config.getint('graphics', 'width') if 'height' not in kwargs: kwargs['height'] = Config.getint('graphics', 'height') if 'rotation' not in kwargs: kwargs['rotation'] = Config.getint('graphics', 'rotation') if 'position' not in kwargs: kwargs['position'] = Config.getdefault('graphics', 'position', 'auto') if 'top' in kwargs: kwargs['position'] = 'custom' kwargs['top'] = kwargs['top'] else: kwargs['top'] = Config.getint('graphics', 'top') if 'left' in kwargs: kwargs['position'] = 'custom' kwargs['left'] = kwargs['left'] else: kwargs['left'] = Config.getint('graphics', 'left') kwargs['_size'] = (kwargs.pop('width'), kwargs.pop('height')) super(WindowBase, self).__init__(**kwargs) # bind all the properties that need to recreate the window for prop in ( 'fullscreen', 'position', 'top', 'left', '_size', 'system_size'): self.bind(**{prop: self.trigger_create_window}) # init privates self._system_keyboard = Keyboard(window=self) self._keyboards = {'system': self._system_keyboard} self._vkeyboard_cls = None self.children = [] self.parent = self # before creating the window import kivy.core.gl # NOQA # configure the window self.create_window() # attach modules + listener event EventLoop.set_window(self) Modules.register_window(self) EventLoop.add_event_listener(self) # manage keyboard(s) self.configure_keyboards() # assign the default context of the widget creation if not hasattr(self, '_context'): self._context = get_current_context() # mark as initialized self.initialized = True
[docs] def toggle_fullscreen(self): '''Toggle fullscreen on window''' pass
[docs] def close(self): '''Close the window''' pass
[docs] def create_window(self, *largs): '''Will create the main window and configure it. .. warning:: This method is called automatically at runtime. If you call it, it will recreate a RenderContext and Canvas. This means you'll have a new graphics tree, and the old one will be unusable. This method exist to permit the creation of a new OpenGL context AFTER closing the first one. (Like using runTouchApp() and stopTouchApp()). This method has only been tested in a unittest environment and is not suitable for Applications. Again, don't use this method unless you know exactly what you are doing! ''' # just to be sure, if the trigger is set, and if this method is # manually called, unset the trigger Clock.unschedule(self.create_window) if not self.initialized: from kivy.core.gl import init_gl init_gl() # create the render context and canvas, only the first time. from kivy.graphics import RenderContext, Canvas self.render_context = RenderContext() self.canvas = Canvas() self.render_context.add(self.canvas) else: # if we get initialized more than once, then reload opengl state # after the second time. # XXX check how it's working on embed platform. if platform == 'linux': # on linux, it's safe for just sending a resize. self.dispatch('on_resize', *self.system_size) else: # on other platform, window are recreated, we need to reload. from kivy.graphics.context import get_context get_context().reload() Clock.schedule_once(lambda x: self.canvas.ask_update(), 0) self.dispatch('on_resize', *self.system_size) # ensure the gl viewport is correct self.update_viewport()
[docs] def on_flip(self): '''Flip between buffers (event)''' self.flip()
[docs] def flip(self): '''Flip between buffers''' pass
def _update_childsize(self, instance, value): self.update_childsize([instance])
[docs] def add_widget(self, widget): '''Add a widget to a window''' widget.parent = self self.children.insert(0, widget) self.canvas.add(widget.canvas) self.update_childsize([widget]) widget.bind( pos_hint=self._update_childsize, size_hint=self._update_childsize, size=self._update_childsize, pos=self._update_childsize)
[docs] def remove_widget(self, widget): '''Remove a widget from a window ''' if not widget in self.children: return self.children.remove(widget) self.canvas.remove(widget.canvas) widget.parent = None widget.unbind( pos_hint=self._update_childsize, size_hint=self._update_childsize, size=self._update_childsize, pos=self._update_childsize)
[docs] def clear(self): '''Clear the window with the background color''' # XXX FIXME use late binding from kivy.graphics.opengl import glClearColor, glClear, \ GL_COLOR_BUFFER_BIT, GL_DEPTH_BUFFER_BIT cc = self._clearcolor if cc is not None: glClearColor(*cc) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
[docs] def set_title(self, title): '''Set the window title. .. versionadded:: 1.0.5 ''' self.title = title
[docs] def set_icon(self, filename): '''Set the icon of the window. .. versionadded:: 1.0.5 ''' self.icon = filename
def to_widget(self, x, y, initial=True, relative=False): return (x, y) def to_window(self, x, y, initial=True, relative=False): return (x, y) def get_root_window(self): return self def get_parent_window(self): return self def get_parent_layout(self): return None def on_draw(self): self.clear() self.render_context.draw()
[docs] def on_motion(self, etype, me): '''Event called when a Motion Event is received. :Parameters: `etype`: str One of 'begin', 'update', 'end' `me`: :class:`~kivy.input.motionevent.MotionEvent` The Motion Event currently dispatched. ''' if me.is_touch: if etype == 'begin': self.dispatch('on_touch_down', me) elif etype == 'update': self.dispatch('on_touch_move', me) elif etype == 'end': self.dispatch('on_touch_up', me)
[docs] def on_touch_down(self, touch): '''Event called when a touch down event is initiated. ''' w, h = self.system_size touch.scale_for_screen(w, h, rotation=self._rotation) for w in self.children[:]: if w.dispatch('on_touch_down', touch): return True
[docs] def on_touch_move(self, touch): '''Event called when a touch event moves (changes location). ''' w, h = self.system_size touch.scale_for_screen(w, h, rotation=self._rotation) for w in self.children[:]: if w.dispatch('on_touch_move', touch): return True
[docs] def on_touch_up(self, touch): '''Event called when a touch event is released (terminated). ''' w, h = self.system_size touch.scale_for_screen(w, h, rotation=self._rotation) for w in self.children[:]: if w.dispatch('on_touch_up', touch): return True
[docs] def on_resize(self, width, height): '''Event called when the window is resized.''' self.update_viewport()
def update_viewport(self): from kivy.graphics.opengl import glViewport from kivy.graphics.transformation import Matrix from math import radians w, h = self.system_size w2, h2 = w / 2., h / 2. r = radians(self.rotation) # prepare the viewport glViewport(0, 0, w, h) # do projection matrix projection_mat = Matrix() projection_mat.view_clip(0.0, w, 0.0, h, -1.0, 1.0, 0) self.render_context['projection_mat'] = projection_mat # do modelview matrix modelview_mat = Matrix().translate(w2, h2, 0) modelview_mat = modelview_mat.multiply(Matrix().rotate(r, 0, 0, 1)) w, h = self.size w2, h2 = w / 2., h / 2. modelview_mat = modelview_mat.multiply(Matrix().translate(-w2, -h2, 0)) self.render_context['modelview_mat'] = modelview_mat # redraw canvas self.canvas.ask_update() # and update childs self.update_childsize() def update_childsize(self, childs=None): width, height = self.size if childs is None: childs = self.children for w in childs: shw, shh = w.size_hint if shw and shh: w.size = shw * width, shh * height elif shw: w.width = shw * width elif shh: w.height = shh * height for key, value in w.pos_hint.items(): if key == 'x': w.x = value * width elif key == 'right': w.right = value * width elif key == 'y': w.y = value * height elif key == 'top': w.top = value * height elif key == 'center_x': w.center_x = value * width elif key == 'center_y': w.center_y = value * height
[docs] def screenshot(self, name='screenshot{:04d}.png'): '''Save the actual displayed image in a file ''' i = 0 path = None if name != 'screenshot{:04d}.png': _ext = name.split('.')[-1] name = ''.join((name[:-(len(_ext) + 1)], '{:04d}.', _ext)) while True: i += 1 path = join(getcwd(), name.format(i)) if not exists(path): break return path
[docs] def on_rotate(self, rotation): '''Event called when the screen has been rotated. ''' pass
[docs] def on_close(self, *largs): '''Event called when the window is closed''' Modules.unregister_window(self) EventLoop.remove_event_listener(self)
[docs] def on_mouse_down(self, x, y, button, modifiers): '''Event called when the mouse is used (pressed/released)''' pass
[docs] def on_mouse_move(self, x, y, modifiers): '''Event called when the mouse is moved with buttons pressed''' pass
[docs] def on_mouse_up(self, x, y, button, modifiers): '''Event called when the mouse is moved with buttons pressed''' pass
[docs] def on_keyboard(self, key, scancode=None, codepoint=None, modifier=None, **kwargs): '''Event called when keyboard is used. .. warning:: Some providers may omit `scancode`, `codepoint` and/or `modifier`! ''' if 'unicode' in kwargs: Logger.warning("The use of the unicode parameter is deprecated, " "and will be removed in future versions. Use " "codepoint instead, which has identical " "semantics.")
[docs] def on_key_down(self, key, scancode=None, codepoint=None, modifier=None, **kwargs): '''Event called when a key is down (same arguments as on_keyboard)''' if 'unicode' in kwargs: Logger.warning("The use of the unicode parameter is deprecated, " "and will be removed in future versions. Use " "codepoint instead, which has identical " "semantics.")
[docs] def on_key_up(self, key, scancode=None, codepoint=None, modifier=None, **kwargs): '''Event called when a key is released (same arguments as on_keyboard) ''' if 'unicode' in kwargs: Logger.warning("The use of the unicode parameter is deprecated, " "and will be removed in future versions. Use " "codepoint instead, which has identical " "semantics.")
[docs] def on_dropfile(self, filename): '''Event called when a file is dropped on the application. .. warning:: This event is currently used only on MacOSX with a patched version of pygame, but is left in place for further evolution (ios, android etc.) .. versionadded:: 1.2.0 ''' pass
@reify
[docs] def dpi(self): '''Return the DPI of the screen. If the implementation doesn't support any DPI lookup, it will just return 96. .. warning:: This value is not cross-platform. Use :attr:`kivy.base.EventLoop.dpi` instead. ''' return 96.
def configure_keyboards(self): # Configure how to provide keyboards (virtual or not) # register system keyboard to listening keys from window sk = self._system_keyboard self.bind( on_key_down=sk._on_window_key_down, on_key_up=sk._on_window_key_up) # use the device's real keyboard self.use_syskeyboard = True # use the device's real keyboard self.allow_vkeyboard = False # one single vkeyboard shared between all widgets self.single_vkeyboard = True # the single vkeyboard is always sitting at the same position self.docked_vkeyboard = False # now read the configuration mode = Config.get('kivy', 'keyboard_mode') if mode not in ('', 'system', 'dock', 'multi', 'systemanddock', 'systemandmulti'): Logger.critical('Window: unknown keyboard mode %r' % mode) # adapt mode according to the configuration if mode == 'system': self.use_syskeyboard = True self.allow_vkeyboard = False self.single_vkeyboard = True self.docked_vkeyboard = False elif mode == 'dock': self.use_syskeyboard = False self.allow_vkeyboard = True self.single_vkeyboard = True self.docked_vkeyboard = True elif mode == 'multi': self.use_syskeyboard = False self.allow_vkeyboard = True self.single_vkeyboard = False self.docked_vkeyboard = False elif mode == 'systemanddock': self.use_syskeyboard = True self.allow_vkeyboard = True self.single_vkeyboard = True self.docked_vkeyboard = True elif mode == 'systemandmulti': self.use_syskeyboard = True self.allow_vkeyboard = True self.single_vkeyboard = False self.docked_vkeyboard = False Logger.info( 'Window: virtual keyboard %sallowed, %s, %s' % ( '' if self.allow_vkeyboard else 'not ', 'single mode' if self.single_vkeyboard else 'multiuser mode', 'docked' if self.docked_vkeyboard else 'not docked'))
[docs] def set_vkeyboard_class(self, cls): '''.. versionadded:: 1.0.8 Set the VKeyboard class to use. If set to None, it will use the :class:`kivy.uix.vkeyboard.VKeyboard`. ''' self._vkeyboard_cls = cls
[docs] def release_all_keyboards(self): '''.. versionadded:: 1.0.8 This will ensure that no virtual keyboard / system keyboard is requested. All instances will be closed. ''' for key in list(self._keyboards.keys())[:]: keyboard = self._keyboards[key] if keyboard: keyboard.release()
[docs] def request_keyboard(self, callback, target, input_type='text'): '''.. versionadded:: 1.0.4 Internal widget method to request the keyboard. This method is rarely required by the end-user as it is handled automatically by the :class:`~kivy.uix.textinput.TextInput`. We expose it in case you want to handle the keyboard manually for unique input scenarios. A widget can request the keyboard, indicating a callback to call when the keyboard is released (or taken by another widget). :Parameters: `callback`: func Callback that will be called when the keyboard is closed. This can be because somebody else requested the keyboard or the user closed it. `target`: Widget Attach the keyboard to the specified `target`. This should be the widget that requested the keyboard. Ensure you have a different target attached to each keyboard if you're working in a multi user mode. .. versionadded:: 1.0.8 `input_type`: string Choose the type of soft keyboard to request. Can be one of 'text', 'number', 'url', 'mail', 'datetime', 'tel', 'address'. .. note:: `input_type` is currently only honored on mobile devices. .. versionadded:: 1.8.0 :Return: An instance of :class:`Keyboard` containing the callback, target, and if the configuration allows it, a :class:`~kivy.uix.vkeyboard.VKeyboard` instance attached as a *.widget* property. ''' # release any previous keyboard attached. self.release_keyboard(target) # if we can use virtual vkeyboard, activate it. if self.allow_vkeyboard: keyboard = None # late import global VKeyboard if VKeyboard is None and self._vkeyboard_cls is None: from kivy.uix.vkeyboard import VKeyboard self._vkeyboard_cls = VKeyboard # if the keyboard doesn't exist, create it. key = 'single' if self.single_vkeyboard else target if key not in self._keyboards: vkeyboard = self._vkeyboard_cls() keyboard = Keyboard(widget=vkeyboard, window=self) vkeyboard.bind( on_key_down=keyboard._on_vkeyboard_key_down, on_key_up=keyboard._on_vkeyboard_key_up) self._keyboards[key] = keyboard else: keyboard = self._keyboards[key] # configure vkeyboard keyboard.target = keyboard.widget.target = target keyboard.callback = keyboard.widget.callback = callback # add to the window self.add_widget(keyboard.widget) # only after add, do dock mode keyboard.widget.docked = self.docked_vkeyboard keyboard.widget.setup_mode() else: # system keyboard, just register the callback. keyboard = self._system_keyboard keyboard.callback = callback keyboard.target = target # use system (hardware) keyboard according to flag if self.allow_vkeyboard and self.use_syskeyboard: self.unbind( on_key_down=keyboard._on_window_key_down, on_key_up=keyboard._on_window_key_up) self.bind( on_key_down=keyboard._on_window_key_down, on_key_up=keyboard._on_window_key_up) return keyboard
[docs] def release_keyboard(self, target=None): '''.. versionadded:: 1.0.4 Internal method for the widget to release the real-keyboard. Check :meth:`request_keyboard` to understand how it works. ''' if self.allow_vkeyboard: key = 'single' if self.single_vkeyboard else target if key not in self._keyboards: return keyboard = self._keyboards[key] callback = keyboard.callback if callback: keyboard.callback = None callback() keyboard.target = None self.remove_widget(keyboard.widget) if key != 'single' and key in self._keyboards: del self._keyboards[key] elif self._system_keyboard.callback: # this way will prevent possible recursion. callback = self._system_keyboard.callback self._system_keyboard.callback = None callback() return True #: Instance of a :class:`WindowBase` implementation
Window = core_select_lib('window', ( ('egl_rpi', 'window_egl_rpi', 'WindowEglRpi'), ('pygame', 'window_pygame', 'WindowPygame'), ('sdl', 'window_sdl', 'WindowSDL'), ('x11', 'window_x11', 'WindowX11'), ), True)