Mercurial > libervia-desktop-kivy
annotate cagou/core/widgets_handler.py @ 355:8b6621cc142c
core (widgets handler): clear widgets when WHWrapper is detached:
when WHWrapper is detached from parent, we call clear_widgets to detach children. This
avoid CagouWidget.whwrapper to lead to this now unused wrapper (this was causing a bug
when testing if a widget is attached and could be re-used, leading to the unnecessary
creation of new widgets).
Added ignore_missing when removing current_slide from visible widgets, to avoid error
logging if wrapper was not active.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Fri, 17 Jan 2020 20:33:43 +0100 |
| parents | 19422bbd9c8e |
| children | e1f56257cabc |
| rev | line source |
|---|---|
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1 #!/usr/bin/env python3 |
| 13 | 2 |
| 3 # Cagou: desktop/mobile frontend for Salut à Toi XMPP client | |
| 282 | 4 # Copyright (C) 2016-2019 Jérôme Poisson (goffi@goffi.org) |
| 13 | 5 |
| 6 # This program is free software: you can redistribute it and/or modify | |
| 7 # it under the terms of the GNU Affero General Public License as published by | |
| 8 # the Free Software Foundation, either version 3 of the License, or | |
| 9 # (at your option) any later version. | |
| 10 | |
| 11 # This program is distributed in the hope that it will be useful, | |
| 12 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 # GNU Affero General Public License for more details. | |
| 15 | |
| 16 # You should have received a copy of the GNU Affero General Public License | |
| 17 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 | |
| 19 | |
| 20 from sat.core import log as logging | |
| 154 | 21 from sat.core import exceptions |
|
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22 from sat_frontends.quick_frontend import quick_widgets |
| 154 | 23 from kivy.graphics import Color, Ellipse |
| 24 from kivy.uix.layout import Layout | |
| 13 | 25 from kivy.uix.boxlayout import BoxLayout |
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26 from kivy.uix.stencilview import StencilView |
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27 from kivy.uix.carousel import Carousel |
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28 from kivy.uix.screenmanager import ScreenManager, Screen |
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29 from kivy.uix.scrollview import ScrollView |
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30 from kivy.metrics import dp |
| 13 | 31 from kivy import properties |
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32 from cagou import G |
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33 from .constants import Const as C |
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34 from . import cagou_widget |
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35 |
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36 log = logging.getLogger(__name__) |
| 13 | 37 |
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38 |
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39 REMOVE_WID_LIMIT = dp(50) |
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40 MIN_WIDTH = MIN_HEIGHT = dp(70) |
| 13 | 41 |
| 42 | |
| 154 | 43 class WHWrapper(BoxLayout): |
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44 main_container = properties.ObjectProperty(None) |
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45 screen_manager = properties.ObjectProperty(None, allownone=True) |
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46 carousel = properties.ObjectProperty(None, allownone=True) |
| 154 | 47 split_size = properties.NumericProperty(dp(1)) |
| 48 split_margin = properties.NumericProperty(dp(2)) | |
| 49 split_color = properties.ListProperty([0.8, 0.8, 0.8, 1]) | |
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50 split_color_move = C.COLOR_SEC_DARK |
| 154 | 51 split_color_del = properties.ListProperty([0.8, 0.0, 0.0, 1]) |
| 52 # sp stands for "split point" | |
| 53 sp_size = properties.NumericProperty(dp(1)) | |
| 54 sp_space = properties.NumericProperty(dp(4)) | |
| 55 sp_zone = properties.NumericProperty(dp(30)) | |
| 56 _split = properties.OptionProperty('None', options=['None', 'left', 'top']) | |
| 57 _split_del = properties.BooleanProperty(False) | |
| 58 | |
| 59 def __init__(self, **kwargs): | |
| 60 idx = kwargs.pop('_wid_idx') | |
| 61 self._wid_idx = idx | |
| 62 super(WHWrapper, self).__init__(**kwargs) | |
| 63 self._left_wids = set() | |
| 64 self._top_wids = set() | |
| 65 self._right_wids = set() | |
| 66 self._bottom_wids = set() | |
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67 self._clear_attributes() |
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68 |
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69 def _clear_attributes(self): |
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70 self._former_slide = None |
| 154 | 71 |
| 72 def __repr__(self): | |
| 73 return "WHWrapper_{idx}".format(idx=self._wid_idx) | |
| 74 | |
| 75 def _main_wid(self, wid_list): | |
| 76 """return main widget of a side list | |
| 77 | |
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78 main widget is either the widget currently splitted |
| 154 | 79 or any widget if none is split |
| 80 @return (WHWrapper, None): main widget or None | |
| 81 if there is not widget | |
| 82 """ | |
| 83 if not wid_list: | |
| 84 return None | |
| 85 for wid in wid_list: | |
| 86 if wid._split != 'None': | |
| 87 return wid | |
| 88 return next(iter(wid_list)) | |
| 89 | |
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90 def on_parent(self, __, new_parent): |
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91 if new_parent is None: |
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92 # we detach all children so CagouWidget.whwrapper won't link to this one |
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93 # anymore |
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94 self.clear_widgets() |
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95 |
| 154 | 96 @property |
| 97 def _left_wid(self): | |
| 98 return self._main_wid(self._left_wids) | |
| 99 | |
| 100 @property | |
| 101 def _top_wid(self): | |
| 102 return self._main_wid(self._top_wids) | |
| 103 | |
| 104 @property | |
| 105 def _right_wid(self): | |
| 106 return self._main_wid(self._right_wids) | |
| 107 | |
| 108 @property | |
| 109 def _bottom_wid(self): | |
| 110 return self._main_wid(self._bottom_wids) | |
| 13 | 111 |
| 154 | 112 @property |
| 113 def current_slide(self): | |
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114 if (self.carousel is not None |
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115 and (self.screen_manager is None or self.screen_manager.current == '')): |
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116 return self.carousel.current_slide |
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117 elif self.screen_manager is not None: |
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118 # we should have exactly one children in current_screen, else there is a bug |
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119 return self.screen_manager.current_screen.children[0] |
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120 else: |
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121 try: |
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122 return self.main_container.children[0] |
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123 except IndexError: |
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124 log.error("No child found, this should not happen") |
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125 return None |
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126 |
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127 @property |
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128 def carousel_active(self): |
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129 """Return True if Carousel is used and active""" |
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130 if self.carousel is None: |
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131 return False |
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132 if self.screen_manager is not None and self.screen_manager.current != '': |
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133 return False |
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134 return True |
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135 |
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136 @property |
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137 def former_screen_wid(self): |
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138 """Return widget currently active for former screen""" |
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139 if self.screen_manager is None: |
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140 raise exceptions.InternalError( |
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141 "former_screen_wid can only be used if ScreenManager is used") |
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142 if self._former_screen_name is None: |
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143 return None |
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144 return self.getScreenWidget(self._former_screen_name) |
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145 |
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146 def getScreenWidget(self, screen_name): |
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147 """Return screen main widget, handling carousel if necessary""" |
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148 if self.carousel is not None and screen_name == '': |
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149 return self.carousel.current_slide |
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150 try: |
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151 return self.screen_manager.get_screen(screen_name).children[0] |
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152 except IndexError: |
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153 return None |
| 154 | 154 |
| 155 def _draw_ellipse(self): | |
| 156 """draw split ellipse""" | |
| 157 color = self.split_color_del if self._split_del else self.split_color_move | |
| 158 try: | |
| 159 self.canvas.after.remove(self.ellipse) | |
| 160 except AttributeError: | |
| 161 pass | |
| 162 if self._split == "top": | |
| 163 with self.canvas.after: | |
| 164 Color(*color) | |
| 165 self.ellipse = Ellipse(angle_start=90, angle_end=270, | |
| 166 pos=(self.x + self.width/2 - self.sp_zone/2, | |
| 167 self.y + self.height - self.sp_zone/2), | |
| 168 size=(self.sp_zone, self.sp_zone)) | |
| 169 elif self._split == "left": | |
| 170 with self.canvas.after: | |
| 171 Color(*color) | |
| 172 self.ellipse = Ellipse(angle_end=180, | |
| 173 pos=(self.x + -self.sp_zone/2, | |
| 174 self.y + self.height/2 - self.sp_zone/2), | |
| 175 size = (self.sp_zone, self.sp_zone)) | |
| 176 else: | |
| 177 raise exceptions.InternalError('unexpected split value') | |
| 13 | 178 |
| 154 | 179 def on_touch_down(self, touch): |
| 180 """activate split if touch is on a split zone""" | |
| 181 if not self.collide_point(*touch.pos): | |
| 182 return | |
| 183 log.debug("WIDGET IDX: {} (left: {}, top: {}, right: {}, bottom: {}), pos: {}, size: {}".format( | |
| 184 self._wid_idx, | |
| 185 'None' if not self._left_wids else [w._wid_idx for w in self._left_wids], | |
| 186 'None' if not self._top_wids else [w._wid_idx for w in self._top_wids], | |
| 187 'None' if not self._right_wids else [w._wid_idx for w in self._right_wids], | |
| 188 'None' if not self._bottom_wids else [w._wid_idx for w in self._bottom_wids], | |
| 189 self.pos, | |
| 190 self.size, | |
| 191 )) | |
| 192 touch_rx, touch_ry = self.to_widget(*touch.pos, relative=True) | |
| 193 if (touch_ry <= self.height and | |
| 194 touch_ry >= self.height - self.split_size - self.split_margin or | |
| 195 touch_ry <= self.height and | |
| 196 touch_ry >= self.height - self.sp_zone and | |
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197 touch_rx >= self.width//2 - self.sp_zone//2 and |
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198 touch_rx <= self.width//2 + self.sp_zone//2): |
| 154 | 199 # split area is touched, we activate top split mode |
| 200 self._split = "top" | |
| 201 self._draw_ellipse() | |
| 202 elif (touch_rx >= 0 and | |
| 203 touch_rx <= self.split_size + self.split_margin or | |
| 204 touch_rx >= 0 and | |
| 205 touch_rx <= self.sp_zone and | |
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206 touch_ry >= self.height//2 - self.sp_zone//2 and |
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207 touch_ry <= self.height//2 + self.sp_zone//2): |
| 154 | 208 # split area is touched, we activate left split mode |
| 209 self._split = "left" | |
| 210 touch.ud['ori_width'] = self.width | |
| 211 self._draw_ellipse() | |
| 13 | 212 else: |
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213 if self.carousel_active and len(self.carousel.slides) <= 1: |
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214 # we don't want swipe of carousel if there is only one slide |
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215 return StencilView.on_touch_down(self.carousel, touch) |
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216 else: |
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217 return super(WHWrapper, self).on_touch_down(touch) |
| 13 | 218 |
| 219 def on_touch_move(self, touch): | |
| 154 | 220 """handle size change and widget creation on split""" |
| 221 if self._split == 'None': | |
| 222 return super(WHWrapper, self).on_touch_move(touch) | |
| 223 | |
| 224 elif self._split == 'top': | |
| 225 new_height = touch.y - self.y | |
| 226 | |
| 227 if new_height < MIN_HEIGHT: | |
| 228 return | |
| 229 | |
| 230 # we must not pass the top widget/border | |
| 231 if self._top_wids: | |
| 232 top = next(iter(self._top_wids)) | |
| 233 y_limit = top.y + top.height | |
| 234 | |
| 235 if top.height <= REMOVE_WID_LIMIT: | |
| 236 # we are in remove zone, we add visual hint for that | |
|
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237 if not self._split_del and self._top_wids: |
| 154 | 238 self._split_del = True |
| 239 self._draw_ellipse() | |
| 240 else: | |
| 241 if self._split_del: | |
| 242 self._split_del = False | |
| 243 self._draw_ellipse() | |
| 244 else: | |
| 245 y_limit = self.y + self.height | |
| 246 | |
| 247 if touch.y >= y_limit: | |
| 248 return | |
| 249 | |
| 250 # all right, we can change size | |
| 251 self.height = new_height | |
| 252 self.ellipse.pos = (self.ellipse.pos[0], touch.y - self.sp_zone/2) | |
| 253 | |
| 254 if not self._top_wids: | |
| 255 # we are the last widget on the top | |
| 256 # so we create a new widget | |
| 257 new_wid = self.parent.add_widget() | |
| 258 self._top_wids.add(new_wid) | |
| 259 new_wid._bottom_wids.add(self) | |
| 260 for w in self._right_wids: | |
| 261 new_wid._right_wids.add(w) | |
| 262 w._left_wids.add(new_wid) | |
| 263 for w in self._left_wids: | |
| 264 new_wid._left_wids.add(w) | |
| 265 w._right_wids.add(new_wid) | |
| 13 | 266 |
| 154 | 267 elif self._split == 'left': |
| 268 ori_width = touch.ud['ori_width'] | |
| 269 new_x = touch.x | |
| 270 new_width = ori_width - (touch.x - touch.ox) | |
| 271 | |
| 272 if new_width < MIN_WIDTH: | |
| 273 return | |
| 274 | |
| 275 # we must not pass the left widget/border | |
| 276 if self._left_wids: | |
| 277 left = next(iter(self._left_wids)) | |
| 278 x_limit = left.x | |
| 279 | |
| 280 if left.width <= REMOVE_WID_LIMIT: | |
| 281 # we are in remove zone, we add visual hint for that | |
|
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282 if not self._split_del and self._left_wids: |
| 154 | 283 self._split_del = True |
| 284 self._draw_ellipse() | |
| 285 else: | |
| 286 if self._split_del: | |
| 287 self._split_del = False | |
| 288 self._draw_ellipse() | |
| 289 else: | |
| 290 x_limit = self.x | |
| 291 | |
| 292 if new_x <= x_limit: | |
| 293 return | |
| 294 | |
| 295 # all right, we can change position/size | |
| 296 self.x = new_x | |
| 297 self.width = new_width | |
| 298 self.ellipse.pos = (touch.x - self.sp_zone/2, self.ellipse.pos[1]) | |
| 299 | |
| 300 if not self._left_wids: | |
| 301 # we are the last widget on the left | |
| 302 # so we create a new widget | |
| 303 new_wid = self.parent.add_widget() | |
| 304 self._left_wids.add(new_wid) | |
| 305 new_wid._right_wids.add(self) | |
| 306 for w in self._top_wids: | |
| 307 new_wid._top_wids.add(w) | |
| 308 w._bottom_wids.add(new_wid) | |
| 309 for w in self._bottom_wids: | |
| 310 new_wid._bottom_wids.add(w) | |
| 311 w._top_wids.add(new_wid) | |
| 312 | |
| 313 else: | |
| 314 raise Exception.InternalError('invalid _split value') | |
| 13 | 315 |
| 316 def on_touch_up(self, touch): | |
| 154 | 317 if self._split == 'None': |
| 318 return super(WHWrapper, self).on_touch_up(touch) | |
| 319 if self._split == 'top': | |
| 320 # we remove all top widgets in delete zone, | |
| 321 # and update there side widgets list | |
| 322 for top in self._top_wids.copy(): | |
| 323 if top.height <= REMOVE_WID_LIMIT: | |
|
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324 G.host._removeVisibleWidget(top.current_slide) |
| 154 | 325 for w in top._top_wids: |
| 326 w._bottom_wids.remove(top) | |
| 327 w._bottom_wids.update(top._bottom_wids) | |
| 328 for w in top._bottom_wids: | |
| 329 w._top_wids.remove(top) | |
| 330 w._top_wids.update(top._top_wids) | |
| 331 for w in top._left_wids: | |
| 332 w._right_wids.remove(top) | |
| 333 for w in top._right_wids: | |
| 334 w._left_wids.remove(top) | |
| 335 self.parent.remove_widget(top) | |
| 336 elif self._split == 'left': | |
| 337 # we remove all left widgets in delete zone, | |
| 338 # and update there side widgets list | |
| 339 for left in self._left_wids.copy(): | |
| 340 if left.width <= REMOVE_WID_LIMIT: | |
|
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341 G.host._removeVisibleWidget(left.current_slide) |
| 154 | 342 for w in left._left_wids: |
| 343 w._right_wids.remove(left) | |
| 344 w._right_wids.update(left._right_wids) | |
| 345 for w in left._right_wids: | |
| 346 w._left_wids.remove(left) | |
| 347 w._left_wids.update(left._left_wids) | |
| 348 for w in left._top_wids: | |
| 349 w._bottom_wids.remove(left) | |
| 350 for w in left._bottom_wids: | |
| 351 w._top_wids.remove(left) | |
| 352 self.parent.remove_widget(left) | |
| 353 self._split = 'None' | |
| 354 self.canvas.after.remove(self.ellipse) | |
| 355 del self.ellipse | |
| 13 | 356 |
|
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357 def clear_widgets(self): |
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358 current_slide = self.current_slide |
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359 if current_slide is not None: |
|
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360 G.host._removeVisibleWidget(current_slide, ignore_missing=True) |
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361 |
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362 super().clear_widgets() |
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363 |
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364 self.screen_manager = None |
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365 self.carousel = None |
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366 self._clear_attributes() |
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367 |
| 154 | 368 def set_widget(self, wid, index=0): |
|
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369 assert len(self.children) == 0 |
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370 |
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371 if wid.collection_carousel or wid.global_screen_manager: |
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372 self.main_container = self |
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373 else: |
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374 self.main_container = ScrollView() |
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375 self.add_widget(self.main_container) |
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376 |
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377 if self.carousel is not None: |
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378 return self.carousel.add_widget(wid, index) |
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379 |
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380 if wid.global_screen_manager: |
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381 if self.screen_manager is None: |
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382 self.screen_manager = ScreenManager() |
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383 self.main_container.add_widget(self.screen_manager) |
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384 parent = Screen() |
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385 self.screen_manager.add_widget(parent) |
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386 self._former_screen_name = '' |
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387 self.screen_manager.bind(current=self.onScreenChange) |
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388 wid.screenManagerInit(self.screen_manager) |
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389 else: |
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390 parent = self.main_container |
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391 |
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392 if wid.collection_carousel: |
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393 # a Carousel is requested, and this is the first widget that we add |
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394 # so we need to create the carousel |
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395 self.carousel = Carousel( |
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396 direction = "right", |
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397 ignore_perpendicular_swipes = True, |
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398 loop = True, |
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399 ) |
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400 self._slides_update_lock = 0 |
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401 self.carousel.bind(current_slide=self.onSlideChange) |
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402 parent.add_widget(self.carousel) |
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403 self.carousel.add_widget(wid, index) |
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404 else: |
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405 # no Carousel requested, we add the widget as a direct child |
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406 parent.add_widget(wid) |
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407 G.host._addVisibleWidget(wid) |
|
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408 |
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409 def changeWidget(self, new_widget): |
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410 """Change currently displayed widget |
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411 |
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412 slides widgets will be updated |
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413 """ |
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414 if (self.carousel is not None |
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415 and self.carousel.current_slide.__class__ == new_widget.__class__): |
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416 # we have the same class, we reuse carousel and screen manager setting |
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417 |
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418 if self.carousel.current_slide != new_widget: |
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419 # slides update need to be blocked to avoid the update in onSlideChange |
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420 # which would mess the removal of current widgets |
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421 self._slides_update_lock += 1 |
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422 new_wid = None |
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423 for w in self.carousel.slides[:]: |
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424 if w.widget_hash == new_widget.widget_hash: |
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425 new_wid = w |
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426 continue |
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427 self.carousel.remove_widget(w) |
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428 if isinstance(w, quick_widgets.QuickWidget): |
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429 G.host.widgets.deleteWidget(w) |
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430 if new_wid is None: |
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431 new_wid = G.host.getOrClone(new_widget) |
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432 self.carousel.add_widget(new_wid) |
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433 self._updateHiddenSlides() |
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434 self._slides_update_lock -= 1 |
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435 |
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436 if self.screen_manager is not None: |
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437 self.screen_manager.clear_widgets([ |
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438 s for s in self.screen_manager.screens if s.name != '']) |
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439 new_wid.screenManagerInit(self.screen_manager) |
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440 else: |
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441 # else, we restart fresh |
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442 self.clear_widgets() |
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443 self.set_widget(G.host.getOrClone(new_widget)) |
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444 |
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445 def onScreenChange(self, screen_manager, new_screen): |
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446 try: |
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447 new_screen_wid = self.current_slide |
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448 except IndexError: |
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449 new_screen_wid = None |
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450 log.warning("Switching to a screen without children") |
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451 if new_screen == '' and self.carousel is not None: |
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452 # carousel may have been changed in the background, so we update slides |
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453 self._updateHiddenSlides() |
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454 former_screen_wid = self.former_screen_wid |
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455 if isinstance(former_screen_wid, cagou_widget.CagouWidget): |
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456 G.host._removeVisibleWidget(former_screen_wid) |
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457 if isinstance(new_screen_wid, cagou_widget.CagouWidget): |
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458 G.host._addVisibleWidget(new_screen_wid) |
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459 self._former_screen_name = new_screen |
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460 G.host.selected_widget = new_screen_wid |
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461 |
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462 def onSlideChange(self, handler, new_slide): |
|
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463 if self._former_slide is new_slide: |
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464 # FIXME: workaround for Kivy a95d67f (and above?), Carousel.current_slide |
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465 # binding now calls onSlideChange twice with the same widget (here |
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466 # "new_slide"). To be checked with Kivy team. |
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467 return |
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468 log.debug(f"Slide change: new_slide = {new_slide}") |
|
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469 if self._former_slide is not None: |
|
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470 G.host._removeVisibleWidget(self._former_slide, ignore_missing=True) |
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471 self._former_slide = new_slide |
|
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472 if self.carousel_active: |
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473 G.host.selected_widget = new_slide |
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474 if new_slide is not None: |
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475 G.host._addVisibleWidget(new_slide) |
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476 self._updateHiddenSlides() |
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477 |
|
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478 def hiddenList(self, visible_list, ignore=None): |
|
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479 """return widgets of same class as carousel current one, if they are hidden |
|
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480 |
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481 @param visible_list(list[QuickWidget]): widgets visible |
|
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482 @param ignore(QuickWidget, None): do no return this widget |
|
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483 @return (iter[QuickWidget]): widgets hidden |
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484 """ |
|
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485 # we want to avoid recreated widgets |
|
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486 added = [w.widget_hash for w in visible_list] |
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487 current_slide = self.carousel.current_slide |
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488 for w in G.host.widgets.getWidgets(current_slide.__class__, |
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489 profiles=current_slide.profiles): |
|
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490 wid_hash = w.widget_hash |
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491 if w in visible_list or wid_hash in added: |
|
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492 continue |
|
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493 if wid_hash == ignore.widget_hash: |
|
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494 continue |
|
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495 yield w |
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496 |
|
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497 def widgets_sort(self, widget): |
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498 """method used as key to sort the widgets |
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499 |
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500 order of the widgets when changing slide is affected |
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501 @param widget(QuickWidget): widget to sort |
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502 @return: a value which will be used for sorting |
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503 """ |
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504 try: |
| 312 | 505 return str(widget.target).lower() |
|
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506 except AttributeError: |
| 312 | 507 return str(list(widget.targets)[0]).lower() |
|
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508 |
|
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509 def _updateHiddenSlides(self): |
|
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510 """adjust carousel slides according to visible widgets""" |
|
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511 if self._slides_update_lock or not self.carousel_active: |
|
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512 return |
|
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513 current_slide = self.carousel.current_slide |
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514 if not isinstance(current_slide, quick_widgets.QuickWidget): |
|
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515 return |
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516 # lock must be used here to avoid recursions |
|
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517 self._slides_update_lock += 1 |
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518 visible_list = G.host.getVisibleList(current_slide.__class__) |
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519 # we ignore current_slide as it may not be visible yet (e.g. if an other |
|
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520 # screen is shown |
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521 hidden = list(self.hiddenList(visible_list, ignore=current_slide)) |
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522 slides_sorted = sorted(set(hidden + [current_slide]), key=self.widgets_sort) |
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523 to_remove = set(self.carousel.slides).difference({current_slide}) |
|
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524 for w in to_remove: |
| 154 | 525 self.carousel.remove_widget(w) |
|
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526 if hidden: |
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527 # no need to add more than two widgets (next and previous), |
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528 # as the list will be updated on each new visible widget |
|
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529 current_idx = slides_sorted.index(current_slide) |
|
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|
530 try: |
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|
531 next_slide = slides_sorted[current_idx+1] |
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532 except IndexError: |
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533 next_slide = slides_sorted[0] |
| 154 | 534 self.carousel.add_widget(G.host.getOrClone(next_slide)) |
|
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535 if len(hidden)>1: |
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536 previous_slide = slides_sorted[current_idx-1] |
| 154 | 537 self.carousel.add_widget(G.host.getOrClone(previous_slide)) |
|
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538 |
|
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539 self._slides_update_lock -= 1 |
|
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540 |
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|
541 |
| 154 | 542 class WidgetsHandlerLayout(Layout): |
| 543 count = 0 | |
| 13 | 544 |
| 154 | 545 def __init__(self, **kwargs): |
| 546 super(WidgetsHandlerLayout, self).__init__(**kwargs) | |
|
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547 self._layout_size = None # size used for the last layout |
| 154 | 548 fbind = self.fbind |
| 549 update = self._trigger_layout | |
| 550 fbind('children', update) | |
| 551 fbind('parent', update) | |
|
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552 fbind('size', self.adjust_prop) |
| 154 | 553 fbind('pos', update) |
| 13 | 554 |
| 14 | 555 @property |
| 556 def default_widget(self): | |
|
16
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557 return G.host.default_wid['factory'](G.host.default_wid, None, None) |
| 14 | 558 |
|
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559 def adjust_prop(self, handler, new_size): |
|
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560 """Adjust children proportion |
|
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561 |
|
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|
562 useful when this widget is resized (e.g. when going to fullscreen) |
|
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|
563 """ |
|
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|
564 if len(self.children) > 1: |
|
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565 old_width, old_height = self._layout_size |
|
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566 if not old_width or not old_height: |
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567 # we don't want division by zero |
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568 return self._trigger_layout(handler, new_size) |
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569 width_factor = float(self.width) / old_width |
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570 height_factor = float(self.height) / old_height |
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571 for child in self.children: |
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572 child.width *= width_factor |
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573 child.height *= height_factor |
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574 child.x *= width_factor |
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575 child.y *= height_factor |
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576 self._trigger_layout(handler, new_size) |
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577 |
| 154 | 578 def do_layout(self, *args): |
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579 self._layout_size = self.size[:] |
| 154 | 580 for child in self.children: |
| 581 # XXX: left must be calculated before right and bottom before top | |
| 582 # because they are the pos, and are used to caculate size (right and top) | |
| 583 # left | |
| 584 left = child._left_wid | |
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585 left_end_x = self.x-1 if left is None else left.right |
| 154 | 586 if child.x != left_end_x + 1 and child._split == "None": |
| 587 child.x = left_end_x + 1 | |
| 588 # right | |
| 589 right = child._right_wid | |
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590 right_x = self.right + 1 if right is None else right.x |
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591 if child.right != right_x - 1: |
| 154 | 592 child.width = right_x - child.x - 1 |
| 593 # bottom | |
| 594 bottom = child._bottom_wid | |
| 595 if bottom is None: | |
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596 if child.y != self.y: |
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597 child.y = self.y |
| 154 | 598 else: |
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599 if child.y != bottom.top + 1: |
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600 child.y = bottom.top + 1 |
| 154 | 601 # top |
| 602 top = child._top_wid | |
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603 top_y = self.top+1 if top is None else top.y |
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604 if child.top != top_y - 1: |
| 154 | 605 if child._split == "None": |
| 606 child.height = top_y - child.y - 1 | |
| 607 | |
| 608 def remove_widget(self, wid): | |
| 609 super(WidgetsHandlerLayout, self).remove_widget(wid) | |
| 610 log.debug("widget deleted ({})".format(wid._wid_idx)) | |
| 611 | |
| 612 def add_widget(self, wid=None, index=0): | |
| 613 WidgetsHandlerLayout.count += 1 | |
| 614 if wid is None: | |
| 615 wid = self.default_widget | |
| 616 wrapper = WHWrapper(_wid_idx=WidgetsHandlerLayout.count) | |
| 617 log.debug("WHWrapper created ({})".format(wrapper._wid_idx)) | |
| 618 wrapper.set_widget(wid) | |
| 619 super(WidgetsHandlerLayout, self).add_widget(wrapper, index) | |
| 620 return wrapper | |
| 621 | |
| 622 | |
| 623 class WidgetsHandler(WidgetsHandlerLayout): | |
| 624 | |
| 625 def __init__(self, **kw): | |
| 626 super(WidgetsHandler, self).__init__(**kw) | |
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627 self.add_widget() |