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annotate src/cagou/core/image.py @ 29:8b5827c43155

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notes first draft: Implementation of XMLUI notes. There is a new header on top of root widget which display notifications, and notes are shown for a couple of seconds. A blue Cagou head appear when there are notes, and user can display 10 last when clicking on it. This header will probably not be present on platforms such as Android, because there is already a system-wide notifications handler which can be used instead (saving visual space).
author Goffi <goffi@goffi.org>
date Sun, 21 Aug 2016 15:15:25 +0200
parents 56838ad5c84b
children d5ede9281e4c
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # Cagou: desktop/mobile frontend for Salut à Toi XMPP client
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5 # Copyright (C) 2016 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20
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21 from sat.core import log as logging
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22 log = logging.getLogger(__name__)
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23 from kivy.uix import image as kivy_img
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24 from kivy.core.image import Image as CoreImage
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25 from kivy.resources import resource_find
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26 import io
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27 import PIL
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28
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29
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30 class Image(kivy_img.Image):
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31 """Image widget which accept source without extension"""
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32
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33 def texture_update(self, *largs):
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34 if not self.source:
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35 self.texture = None
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36 else:
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37 filename = resource_find(self.source)
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38 self._loops = 0
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39 if filename is None:
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40 return log.error('Image: Error reading file {filename}'.
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41 format(filename=self.source))
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42 mipmap = self.mipmap
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43 if self._coreimage is not None:
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44 self._coreimage.unbind(on_texture=self._on_tex_change)
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45 try:
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46 self._coreimage = ci = CoreImage(filename, mipmap=mipmap,
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47 anim_delay=self.anim_delay,
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48 keep_data=self.keep_data,
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49 nocache=self.nocache)
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50 except Exception as e:
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51 # loading failed probably because of unmanaged extention,
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52 # we try our luck with with PIL
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53 try:
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54 im = PIL.Image.open(filename)
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55 ext = im.format.lower()
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56 del im
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57 # we can't use im.tobytes as it would use the
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58 # internal decompressed representation from pillow
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59 # and im.save would need processing to handle format
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60 data = io.BytesIO(open(filename, "rb").read())
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61 cache_filename = u"{}.{}".format(filename,ext) # needed for kivy's Image to use cache
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62 self._coreimage = ci = CoreImage(data, ext=ext,
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63 filename=cache_filename, mipmap=mipmap,
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64 anim_delay=self.anim_delay,
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65 keep_data=self.keep_data,
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66 nocache=self.nocache)
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67 except Exception as e:
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68 log.warning(u"Can't load image: {}".format(e))
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69 self._coreimage = ci = None
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70
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71 if ci:
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72 ci.bind(on_texture=self._on_tex_change)
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73 self.texture = ci.texture