741 lines
26 KiB
Cython
741 lines
26 KiB
Cython
# Copyright (C) 2007-2015 various contributors (see AUTHORS)
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#
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# This file is part of Python-EFL.
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#
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# Python-EFL is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 3 of the License, or (at your option) any later version.
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#
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# Python-EFL is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this Python-EFL. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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.. image:: /images/slideshow-preview.png
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Widget description
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------------------
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This widget, as the name indicates, is a pre-made image
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slideshow panel, with API functions acting on (child) image
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items presentation. Between those actions, are:
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- advance to next/previous image
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- select the style of image transition animation
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- set the exhibition time for each image
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- start/stop the slideshow
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The transition animations are defined in the widget's theme,
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consequently new animations can be added without having to
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update the widget's code.
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Slideshow items
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===============
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For slideshow items, just like for :py:class:`~efl.elementary.genlist.Genlist`
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ones, the user defines a **classes**, specifying functions that will be called
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on the item's creation and deletion times.
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The :py:class:`SlideshowItemClass` class contains the following
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members:
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- ``get`` - When an item is displayed, this function is
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called, and it's where one should create the item object, de
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facto. For example, the object can be a pure Evas image object
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or a :py:class:`~efl.elementary.photocam.Photocam` widget.
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- ``delete`` - When an item is no more displayed, this function
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is called, where the user must delete any data associated to
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the item.
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Slideshow caching
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=================
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The slideshow provides facilities to have items adjacent to the
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one being displayed **already "realized"** (i.e. loaded) for
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you, so that the system does not have to decode image data
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anymore at the time it has to actually switch images on its
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viewport. The user is able to set the numbers of items to be
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cached **before** and **after** the current item, in the widget's
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item list.
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This widget emits the following signals, besides the ones sent from
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:py:class:`~efl.elementary.layout_class.LayoutClass`:
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- ``changed`` - when the slideshow switches its view to a new item.
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event_info parameter in callback contains the current visible item
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- ``transition,end`` - when a slide transition ends. event_info
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parameter in callback contains the current visible item
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- ``focused`` - When the slideshow has received focus. (since 1.8)
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- ``unfocused`` - When the slideshow has lost focus. (since 1.8)
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"""
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from cpython cimport PyUnicode_AsUTF8String, Py_INCREF
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from libc.stdint cimport uintptr_t
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from efl.eo cimport _object_mapping_register, object_from_instance, PY_REFCOUNT
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from efl.utils.conversions cimport _ctouni
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from efl.evas cimport Object as evasObject
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from efl.utils.conversions cimport eina_list_strings_to_python_list
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from layout_class cimport LayoutClass
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import traceback
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from object_item cimport _object_item_to_python, _object_item_list_to_python, \
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ObjectItem
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def _cb_object_item_conv(uintptr_t addr):
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cdef Elm_Object_Item *it = <Elm_Object_Item *>addr
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return _object_item_to_python(it)
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cdef Evas_Object *_py_elm_slideshow_item_get(void *data, Evas_Object *obj) with gil:
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cdef SlideshowItem item = <object>data
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cdef evasObject icon
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cdef SlideshowItemClass itc = item.cls
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func = itc._get_func
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if func is None:
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return NULL
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try:
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o = object_from_instance(obj)
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ret = func(o, *item.args, **item.kwargs)
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except Exception:
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traceback.print_exc()
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return NULL
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if ret is None:
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return NULL
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icon = ret
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return icon.obj
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cdef void _py_elm_slideshow_item_del(void *data, Evas_Object *obj) with gil:
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cdef SlideshowItem item = <object>data
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cdef SlideshowItemClass itc = item.cls
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func = itc._del_func
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if func is not None:
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try:
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o = object_from_instance(obj)
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func(o, *item.args, **item.kwargs)
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except Exception:
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traceback.print_exc()
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# XXX: SlideShow item handling is weird
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#item._unset_obj()
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#Py_DECREF(item)
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cdef int _py_elm_slideshow_compare_func(const void *data1, const void *data2) with gil:
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cdef SlideshowItem item1 = <object>data1
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cdef SlideshowItem item2 = <object>data2
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cdef object func = item1.compare_func
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if func is None:
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return 0
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ret = func(item1, item2)
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if ret is not None:
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try:
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return ret
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except Exception:
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traceback.print_exc()
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return 0
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else:
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return 0
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cdef class SlideshowItemClass (object):
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"""
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Defines the behavior of each slideshow item.
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This class should be created and handled to the Slideshow itself.
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It may be subclassed, in this case the methods :py:func:`get()` and ``delete()``
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will be used.
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It may also be instantiated directly, given getters to override as
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constructor parameters.
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:param get_func: if provided will override the behavior
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defined by :py:func:`get()` in this class. Its purpose is
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to return the icon object to be used (swallowed) by a
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given part and row. This function should have the
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signature:
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``func(obj, item_data) -> obj``
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:param del_func: if provided will override the behavior
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defined by ``delete()`` in this class. Its purpose is to be
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called when item is deleted, thus finalizing resources
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and similar. This function should have the signature:
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``func(obj, item_data)``
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.. note:: In all these signatures, 'obj' means Slideshow and
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'item_data' is the value given to Slideshow item append/prepend
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methods, it should represent your item model as you want.
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"""
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cdef Elm_Slideshow_Item_Class obj
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cdef readonly object _get_func
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cdef readonly object _del_func
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def __cinit__(self, *a, **ka):
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self.obj.func.get = _py_elm_slideshow_item_get
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self.obj.func.del_ = _py_elm_slideshow_item_del
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def __init__(self, get_func=None, del_func=None):
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if get_func and not callable(get_func):
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raise TypeError("get_func is not callable!")
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elif get_func:
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self._get_func = get_func
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else:
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self._get_func = self.get
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if del_func and not callable(del_func):
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raise TypeError("del_func is not callable!")
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elif del_func:
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self._del_func = del_func
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else:
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try:
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self._del_func = self.delete
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except AttributeError:
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pass
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def __repr__(self):
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return ("<%s(%#x, refcount=%d, Elm_Slideshow_Item_Class=%#x, "
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"get_func=%s, del_func=%s)>") % \
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(type(self).__name__,
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<uintptr_t><void *>self,
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PY_REFCOUNT(self),
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<uintptr_t>&self.obj,
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self._get_func,
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self._del_func)
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def get(self, evasObject obj, item_data):
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"""To be called by Slideshow for each item to get its icon.
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:param obj: the Slideshow instance
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:param item_data: the value given to slideshow append/prepend.
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:return: icon object to be used and swallowed.
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:rtype: evas Object or None
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"""
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return None
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cdef class SlideshowItem(ObjectItem):
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"""
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An item for the :class:`Slideshow` widget.
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"""
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cdef:
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SlideshowItemClass cls
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object compare_func
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cdef int _set_obj(self, Elm_Object_Item *item) except 0:
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assert self.item == NULL, "Object must be clean"
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self.item = item
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Py_INCREF(self)
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return 1
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cdef void _unset_obj(self):
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assert self.item != NULL, "Object must wrap something"
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self.item = NULL
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def __init__(self, SlideshowItemClass item_class not None, *args, **kwargs):
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self.cls = item_class
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self.args = args
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self.kwargs = kwargs
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def __repr__(self):
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return ("<%s(%#x, refcount=%d, Elm_Object_Item=%#x, "
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"item_class=%s, item_data=%r)>") % \
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(type(self).__name__,
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<uintptr_t><void*>self,
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PY_REFCOUNT(self),
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<uintptr_t>self.obj,
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type(self.cls).__name__,
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self.args)
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def add_to(self, Slideshow slideshow not None):
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"""Add (append) a new item in a given slideshow widget.
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Add a new item to ``obj's`` internal list of items, appending it.
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The item's class must contain the function really fetching the
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image object to show for this item, which could be an Evas image
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object or an Elementary photo, for example. The ``data``
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parameter is going to be passed to both class functions of the
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item.
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.. seealso::
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:py:class:`SlideshowItemClass`
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:py:meth:`sorted_insert`
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:py:attr:`~efl.elementary.object_item.ObjectItem.data`
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:param item_class: The item class for the item
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:type item_class: :py:class:`SlideshowItemClass`
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:return: A handle to the item added or ``None``, on errors
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:rtype: :py:class:`SlideshowItem`
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"""
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cdef Elm_Object_Item *item
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item = elm_slideshow_item_add(slideshow.obj, &self.cls.obj, <void*>self)
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if item == NULL:
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raise RuntimeError("The item could not be added to the widget.")
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self._set_obj(item)
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self._set_properties_from_keyword_args(self.kwargs)
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return self
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def sorted_insert(self, Slideshow slideshow not None, func not None):
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"""Insert a new item into the given slideshow widget, using the ``func``
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function to sort items (by item handles).
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Add a new item to ``obj``'s internal list of items, in a position
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determined by the ``func`` comparing function. The item's class
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must contain the function really fetching the image object to
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show for this item, which could be an Evas image object or an
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Elementary photo, for example. The ``data`` parameter is going to
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be passed to both class functions of the item.
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The compare function compares data1 and data2. If data1 is 'less'
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than data2, -1 must be returned, if it is 'greater', 1 must be
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returned, and if they are equal, 0 must be returned.
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.. seealso::
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:py:class:`SlideshowItemClass`
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:py:meth:`add_to`
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:param itc: The item class for the item
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:param func: The comparing function to be used to sort slideshow
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items **by SlideshowItemClass item handles**
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:return: Returns The slideshow item handle, on success, or
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``None``, on errors
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"""
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cdef Elm_Object_Item *item
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cdef Eina_Compare_Cb compare
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if not callable(func):
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raise TypeError("func is not None or callable")
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self.compare_func = func
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compare = _py_elm_slideshow_compare_func
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item = elm_slideshow_item_sorted_insert(slideshow.obj, &self.cls.obj, \
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<void*>self, compare)
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if item == NULL:
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raise RuntimeError("The item could not be added to the widget.")
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self._set_obj(item)
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self._set_properties_from_keyword_args(self.kwargs)
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return self
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property object:
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"""Get the real Evas object created to implement the view of a given
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slideshow item.
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This returns the actual Evas object used to implement the specified
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slideshow item's view. This may be ``None``, as it may not have been
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created or may have been deleted, at any time, by the slideshow.
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**Do not modify this object** (move, resize, show, hide, etc.), as
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the slideshow is controlling it. This function is for querying,
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emitting custom signals or hooking lower level callbacks for events
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on that object. Do not delete this object under any circumstances.
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.. seealso:: :py:attr:`~efl.elementary.object_item.ObjectItem.data`
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:type: :py:class:`Slideshow`
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"""
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def __get__(self):
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return object_from_instance(elm_slideshow_item_object_get(self.item))
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def show(self):
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"""Display a given slideshow widget's item, programmatically.
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The change between the current item and this item will use the
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transition the slideshow object is set to use.
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.. seealso:: :py:attr:`Slideshow.transition`
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"""
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elm_slideshow_item_show(self.item)
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cdef class Slideshow(LayoutClass):
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"""
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This is the class that actually implements the widget.
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"""
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def __init__(self, evasObject parent, *args, **kwargs):
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"""Slideshow(...)
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:param parent: The parent object
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:type parent: :py:class:`efl.evas.Object`
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:param \**kwargs: All the remaining keyword arguments are interpreted
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as properties of the instance
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"""
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self._set_obj(elm_slideshow_add(parent.obj))
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self._set_properties_from_keyword_args(kwargs)
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def item_add(self, SlideshowItemClass item_class not None, *args, **kwargs):
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"""Add (append) a new item in a given slideshow widget.
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Add a new item to ``obj's`` internal list of items, appending it.
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The item's class must contain the function really fetching the
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image object to show for this item, which could be an Evas image
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object or an Elementary photo, for example. The ``data``
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parameter is going to be passed to both class functions of the
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item.
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.. seealso::
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:py:class:`SlideshowItemClass`
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:py:func:`item_sorted_insert()`
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:py:attr:`efl.elementary.object_item.ObjectItem.data`
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:param item_class: The item class for the item
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:type item_class: :py:class:`SlideshowItemClass`
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:return: A handle to the item added or ``None``, on errors
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:rtype: :py:class:`SlideshowItem`
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"""
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return SlideshowItem(item_class, *args, **kwargs).add_to(self)
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def item_sorted_insert(self, SlideshowItemClass item_class not None,
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func not None, *args, **kwargs):
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"""Insert a new item into the given slideshow widget, using the ``func``
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function to sort items (by item handles).
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|
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Add a new item to ``obj``'s internal list of items, in a position
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determined by the ``func`` comparing function. The item's class
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must contain the function really fetching the image object to
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show for this item, which could be an Evas image object or an
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Elementary photo, for example. The ``data`` parameter is going to
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be passed to both class functions of the item.
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The compare function compares data1 and data2. If data1 is 'less'
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than data2, -1 must be returned, if it is 'greater', 1 must be
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returned, and if they are equal, 0 must be returned.
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.. seealso::
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:py:class:`SlideshowItemClass`
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:py:func:`item_add()`
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:param itc: The item class for the item
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:param func: The comparing function to be used to sort slideshow
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items **by SlideshowItemClass item handles**
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:return: Returns The slideshow item handle, on success, or
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``None``, on errors
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"""
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return SlideshowItem(item_class, *args, **kwargs).sorted_insert(self, func)
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def next(self):
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"""Slide to the **next** item, in a given slideshow widget
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The sliding animation the object is set to use will be the
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transition effect used, after this call is issued.
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.. note:: If the end of the slideshow's internal list of items is
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reached, it'll wrap around to the list's beginning, again.
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"""
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elm_slideshow_next(self.obj)
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def previous(self):
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"""Slide to the **previous** item, in a given slideshow widget
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The sliding animation the object is set to use will be the
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transition effect used, after this call is issued.
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.. note:: If the beginning of the slideshow's internal list of items
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is reached, it'll wrap around to the list's end, again.
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"""
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elm_slideshow_previous(self.obj)
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property transitions:
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"""Returns the list of sliding transition/effect names available,
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for a given slideshow widget.
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The transitions, which come from the objects theme, must be an EDC
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data item named ``"transitions"`` on the theme file, with (prefix)
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names of EDC programs actually implementing them.
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The available transitions for slideshows on the default theme are:
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- ``"fade"`` - the current item fades out, while the new one
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fades in to the slideshow's viewport.
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- ``"black_fade"`` - the current item fades to black, and just
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then, the new item will fade in.
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- ``"horizontal"`` - the current item slides horizontally, until
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it gets out of the slideshow's viewport, while the new item
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comes from the left to take its place.
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- ``"vertical"`` - the current item slides vertically, until it
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gets out of the slideshow's viewport, while the new item comes
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from the bottom to take its place.
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- ``"square"`` - the new item starts to appear from the middle of
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the current one, but with a tiny size, growing until its
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target (full) size and covering the old one.
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.. seealso:: :py:attr:`transition`
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:type: tuple of strings
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"""
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def __get__(self):
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return tuple(eina_list_strings_to_python_list(elm_slideshow_transitions_get(self.obj)))
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property transition:
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"""The slide transition/effect in use for a given slideshow widget
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If ``transition`` is implemented in ``obj's`` theme (i.e., is
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contained in the list returned by :py:attr:`transitions`), this new sliding
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effect will be used on the widget.
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:type: string
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|
"""
|
|
def __set__(self, transition):
|
|
if isinstance(transition, unicode): transition = PyUnicode_AsUTF8String(transition)
|
|
elm_slideshow_transition_set(self.obj,
|
|
<const char *>transition if transition is not None else NULL)
|
|
def __get__(self):
|
|
return _ctouni(elm_slideshow_transition_get(self.obj))
|
|
|
|
property timeout:
|
|
"""The interval between each image transition on a given
|
|
slideshow widget, **and start the slideshow, itself**
|
|
|
|
After setting this, the slideshow widget will start cycling its
|
|
view, sequentially and automatically, with the images of the
|
|
items it has. The time between each new image displayed is going
|
|
to be ``timeout`` in **seconds**. If a different timeout was set
|
|
previously and an slideshow was in progress, it will continue
|
|
with the new time between transitions, after this call.
|
|
|
|
.. note:: A value less than or equal to 0 on ``timeout`` will disable
|
|
the widget's internal timer, thus halting any slideshow which
|
|
could be happening on ``obj``.
|
|
|
|
:type: float
|
|
|
|
"""
|
|
def __set__(self, timeout):
|
|
elm_slideshow_timeout_set(self.obj, timeout)
|
|
def __get__(self):
|
|
return elm_slideshow_timeout_get(self.obj)
|
|
|
|
property loop:
|
|
"""If, after a slideshow is started, for a given slideshow
|
|
widget, its items should be displayed cyclically or not.
|
|
|
|
.. note:: The methods :py:func:`next()` and :py:func:`previous()`
|
|
will **ignore** what is set by this property, i.e.,
|
|
they'll **always** cycle through items. This affects only
|
|
the "automatic" slideshow, as set by :py:attr:`timeout`.
|
|
|
|
:type: bool
|
|
|
|
"""
|
|
def __set__(self, loop):
|
|
elm_slideshow_loop_set(self.obj, loop)
|
|
def __get__(self):
|
|
return bool(elm_slideshow_loop_get(self.obj))
|
|
|
|
def clear(self):
|
|
"""Remove all items from a given slideshow widget.
|
|
|
|
This removes (and deletes) all items in the object, leaving it empty.
|
|
|
|
.. seealso::
|
|
|
|
:py:meth:`~efl.elementary.object_item.ObjectItem.delete`, to remove
|
|
just one item.
|
|
|
|
"""
|
|
elm_slideshow_clear(self.obj)
|
|
|
|
property items:
|
|
"""Get the internal list of items in a given slideshow widget.
|
|
|
|
This list is **not** to be modified in any way and must not be freed.
|
|
Use the list members with functions like
|
|
:py:meth:`~efl.elementary.object_item.ObjectItem.delete`,
|
|
:py:attr:`~efl.elementary.object_item.ObjectItem.data`.
|
|
|
|
.. warning::
|
|
|
|
This list is only valid until ``obj`` object's internal items list
|
|
is changed. It should be fetched again with another call to this
|
|
function when changes happen.
|
|
|
|
:type: tuple of :py:class:`SlideshowItem`
|
|
|
|
"""
|
|
def __get__(self):
|
|
return tuple(_object_item_list_to_python(elm_slideshow_items_get(self.obj)))
|
|
|
|
property current_item:
|
|
"""The currently displayed item, in a given slideshow widget
|
|
|
|
:type: :py:class:`SlideshowItem`
|
|
|
|
"""
|
|
def __get__(self):
|
|
return _object_item_to_python(elm_slideshow_item_current_get(self.obj))
|
|
|
|
def nth_item_get(self, nth):
|
|
"""Get the the item, in a given slideshow widget, placed at position
|
|
``nth`` in its internal items list.
|
|
|
|
:param nth: The number of the item to grab a handle to (0 being the
|
|
first)
|
|
:type nth: int
|
|
|
|
:return: The item stored in ``obj`` at position ``nth`` or ``None``,
|
|
if there's no item with that index (and on errors)
|
|
:rtype: :py:class:`SlideshowItem`
|
|
|
|
"""
|
|
return _object_item_to_python(elm_slideshow_item_nth_get(self.obj, nth))
|
|
|
|
property layout:
|
|
"""The current slide layout in use for a given slideshow widget
|
|
|
|
If ``layout`` is implemented in ``obj's`` theme (i.e., is contained
|
|
in the list returned by elm_slideshow_layouts_get()), this new
|
|
images layout will be used on the widget.
|
|
|
|
:type: string
|
|
|
|
"""
|
|
def __set__(self, layout):
|
|
if isinstance(layout, unicode): layout = PyUnicode_AsUTF8String(layout)
|
|
elm_slideshow_layout_set(self.obj,
|
|
<const char *>layout if layout is not None else NULL)
|
|
def __get__(self):
|
|
return _ctouni(elm_slideshow_layout_get(self.obj))
|
|
|
|
property layouts:
|
|
"""Returns the list of **layout** names available, for a given
|
|
slideshow widget.
|
|
|
|
Slideshow layouts will change how the widget is to dispose each
|
|
image item in its viewport, with regard to cropping, scaling,
|
|
etc.
|
|
|
|
The layouts, which come from the object theme, must be an EDC
|
|
data item name ``"layouts"`` on the theme file, with (prefix)
|
|
names of EDC programs actually implementing them.
|
|
|
|
The available layouts for slideshows on the default theme are:
|
|
- ``"fullscreen"`` - item images with original aspect, scaled to
|
|
touch top and down slideshow borders or, if the image's height
|
|
is not enough, left and right slideshow borders.
|
|
- ``"not_fullscreen"`` - the same behavior as the ``"fullscreen"``
|
|
one, but always leaving 10% of the slideshow's dimensions of
|
|
distance between the item image's borders and the slideshow
|
|
borders, for each axis.
|
|
|
|
.. seealso:: :py:attr:`layout`
|
|
|
|
:type: tuple of strings
|
|
|
|
"""
|
|
def __get__(self):
|
|
return tuple(eina_list_strings_to_python_list(elm_slideshow_layouts_get(self.obj)))
|
|
|
|
property cache_before:
|
|
"""The number of items to cache, on a given slideshow widget,
|
|
**before the current item**
|
|
|
|
The default value for this property is ``2``.
|
|
|
|
:type: int
|
|
|
|
"""
|
|
def __set__(self, count):
|
|
elm_slideshow_cache_before_set(self.obj, count)
|
|
def __get__(self):
|
|
return elm_slideshow_cache_before_get(self.obj)
|
|
|
|
property cache_after:
|
|
"""The number of items to cache, on a given slideshow widget,
|
|
**after the current item**
|
|
|
|
The default value for this property is ``2``.
|
|
|
|
:type: int
|
|
|
|
"""
|
|
def __set__(self, count):
|
|
elm_slideshow_cache_after_set(self.obj, count)
|
|
def __get__(self):
|
|
return elm_slideshow_cache_after_get(self.obj)
|
|
|
|
property count:
|
|
"""Get the number of items stored in a given slideshow widget
|
|
|
|
:type: int
|
|
|
|
"""
|
|
def __get__(self):
|
|
return elm_slideshow_count_get(self.obj)
|
|
|
|
def callback_changed_add(self, func, *args, **kwargs):
|
|
"""When the slideshow switches its view to a new item. event_info
|
|
parameter in callback contains the current visible item."""
|
|
self._callback_add_full("changed", _cb_object_item_conv,
|
|
func, *args, **kwargs)
|
|
|
|
def callback_changed_del(self, func):
|
|
self._callback_del_full("changed", _cb_object_item_conv, func)
|
|
|
|
def callback_transition_end_add(self, func, *args, **kwargs):
|
|
"""When a slide transition ends. event_info parameter in callback
|
|
contains the current visible item."""
|
|
self._callback_add_full("transition,end", _cb_object_item_conv,
|
|
func, *args, **kwargs)
|
|
|
|
def callback_transition_end_del(self, func):
|
|
self._callback_del_full("transition,end", _cb_object_item_conv, func)
|
|
|
|
def callback_focused_add(self, func, *args, **kwargs):
|
|
"""When the slideshow has received focus.
|
|
|
|
.. versionadded:: 1.8
|
|
"""
|
|
self._callback_add("focused", func, *args, **kwargs)
|
|
|
|
def callback_focused_del(self, func):
|
|
self._callback_del("focused", func)
|
|
|
|
def callback_unfocused_add(self, func, *args, **kwargs):
|
|
"""When the slideshow has lost focus.
|
|
|
|
.. versionadded:: 1.8
|
|
"""
|
|
self._callback_add("unfocused", func, *args, **kwargs)
|
|
|
|
def callback_unfocused_del(self, func):
|
|
self._callback_del("unfocused", func)
|
|
|
|
_object_mapping_register("Elm_Slideshow", Slideshow)
|