Mercurial > libervia-desktop
annotate cagou/core/widgets_handler.py @ 353:19422bbd9c8e
core (widgets handler): refactoring:
- CagouWidget now has class properties (to be overridden when needed) which indicate how
if the widget handle must add a wrapping ScreenManager (global_screen_manager) or show
all instances of the class in a Carousel (collection_carousel). If none of those
options is used, a ScrollView will be wrapping the widget, to be sure that the widget
will be resized correctly when necessary (without it, the widget could still be
drawn in the backround when the size is too small and overflow on the WidgetWrapper,
this would be the case with WidgetSelector)
- some helper methods/properties have been added to CagouWidget. Check docstrings for
details
- better handling of (in)visible widget in WidgetsHandler
- thanks to the new wrapping ScrollView, WidgetSelect will show scroll bars if the
available space is too small.
- bugs fixes
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Fri, 17 Jan 2020 18:44:35 +0100 |
| parents | 772c170b47a9 |
| children | 8b6621cc142c |
| 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 | |
| 90 @property | |
| 91 def _left_wid(self): | |
| 92 return self._main_wid(self._left_wids) | |
| 93 | |
| 94 @property | |
| 95 def _top_wid(self): | |
| 96 return self._main_wid(self._top_wids) | |
| 97 | |
| 98 @property | |
| 99 def _right_wid(self): | |
| 100 return self._main_wid(self._right_wids) | |
| 101 | |
| 102 @property | |
| 103 def _bottom_wid(self): | |
| 104 return self._main_wid(self._bottom_wids) | |
| 13 | 105 |
| 154 | 106 @property |
| 107 def current_slide(self): | |
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108 if (self.carousel is not None |
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109 and (self.screen_manager is None or self.screen_manager.current == '')): |
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110 return self.carousel.current_slide |
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111 elif self.screen_manager is not None: |
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112 # we should have exactly one children in current_screen, else there is a bug |
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113 return self.screen_manager.current_screen.children[0] |
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114 else: |
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115 try: |
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116 return self.main_container.children[0] |
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117 except IndexError: |
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118 log.error("No child found, this should not happen") |
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119 return None |
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120 |
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121 @property |
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122 def carousel_active(self): |
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123 """Return True if Carousel is used and active""" |
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124 if self.carousel is None: |
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125 return False |
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126 if self.screen_manager is not None and self.screen_manager.current != '': |
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127 return False |
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128 return True |
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129 |
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130 @property |
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131 def former_screen_wid(self): |
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132 """Return widget currently active for former screen""" |
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133 if self.screen_manager is None: |
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134 raise exceptions.InternalError( |
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135 "former_screen_wid can only be used if ScreenManager is used") |
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136 if self._former_screen_name is None: |
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137 return None |
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138 return self.getScreenWidget(self._former_screen_name) |
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139 |
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140 def getScreenWidget(self, screen_name): |
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141 """Return screen main widget, handling carousel if necessary""" |
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142 if self.carousel is not None and screen_name == '': |
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143 return self.carousel.current_slide |
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144 try: |
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145 return self.screen_manager.get_screen(screen_name).children[0] |
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146 except IndexError: |
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147 return None |
| 154 | 148 |
| 149 def _draw_ellipse(self): | |
| 150 """draw split ellipse""" | |
| 151 color = self.split_color_del if self._split_del else self.split_color_move | |
| 152 try: | |
| 153 self.canvas.after.remove(self.ellipse) | |
| 154 except AttributeError: | |
| 155 pass | |
| 156 if self._split == "top": | |
| 157 with self.canvas.after: | |
| 158 Color(*color) | |
| 159 self.ellipse = Ellipse(angle_start=90, angle_end=270, | |
| 160 pos=(self.x + self.width/2 - self.sp_zone/2, | |
| 161 self.y + self.height - self.sp_zone/2), | |
| 162 size=(self.sp_zone, self.sp_zone)) | |
| 163 elif self._split == "left": | |
| 164 with self.canvas.after: | |
| 165 Color(*color) | |
| 166 self.ellipse = Ellipse(angle_end=180, | |
| 167 pos=(self.x + -self.sp_zone/2, | |
| 168 self.y + self.height/2 - self.sp_zone/2), | |
| 169 size = (self.sp_zone, self.sp_zone)) | |
| 170 else: | |
| 171 raise exceptions.InternalError('unexpected split value') | |
| 13 | 172 |
| 154 | 173 def on_touch_down(self, touch): |
| 174 """activate split if touch is on a split zone""" | |
| 175 if not self.collide_point(*touch.pos): | |
| 176 return | |
| 177 log.debug("WIDGET IDX: {} (left: {}, top: {}, right: {}, bottom: {}), pos: {}, size: {}".format( | |
| 178 self._wid_idx, | |
| 179 'None' if not self._left_wids else [w._wid_idx for w in self._left_wids], | |
| 180 'None' if not self._top_wids else [w._wid_idx for w in self._top_wids], | |
| 181 'None' if not self._right_wids else [w._wid_idx for w in self._right_wids], | |
| 182 'None' if not self._bottom_wids else [w._wid_idx for w in self._bottom_wids], | |
| 183 self.pos, | |
| 184 self.size, | |
| 185 )) | |
| 186 touch_rx, touch_ry = self.to_widget(*touch.pos, relative=True) | |
| 187 if (touch_ry <= self.height and | |
| 188 touch_ry >= self.height - self.split_size - self.split_margin or | |
| 189 touch_ry <= self.height and | |
| 190 touch_ry >= self.height - self.sp_zone and | |
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191 touch_rx >= self.width//2 - self.sp_zone//2 and |
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192 touch_rx <= self.width//2 + self.sp_zone//2): |
| 154 | 193 # split area is touched, we activate top split mode |
| 194 self._split = "top" | |
| 195 self._draw_ellipse() | |
| 196 elif (touch_rx >= 0 and | |
| 197 touch_rx <= self.split_size + self.split_margin or | |
| 198 touch_rx >= 0 and | |
| 199 touch_rx <= self.sp_zone and | |
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200 touch_ry >= self.height//2 - self.sp_zone//2 and |
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201 touch_ry <= self.height//2 + self.sp_zone//2): |
| 154 | 202 # split area is touched, we activate left split mode |
| 203 self._split = "left" | |
| 204 touch.ud['ori_width'] = self.width | |
| 205 self._draw_ellipse() | |
| 13 | 206 else: |
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207 if self.carousel_active and len(self.carousel.slides) <= 1: |
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208 # we don't want swipe of carousel if there is only one slide |
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209 return StencilView.on_touch_down(self.carousel, touch) |
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210 else: |
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211 return super(WHWrapper, self).on_touch_down(touch) |
| 13 | 212 |
| 213 def on_touch_move(self, touch): | |
| 154 | 214 """handle size change and widget creation on split""" |
| 215 if self._split == 'None': | |
| 216 return super(WHWrapper, self).on_touch_move(touch) | |
| 217 | |
| 218 elif self._split == 'top': | |
| 219 new_height = touch.y - self.y | |
| 220 | |
| 221 if new_height < MIN_HEIGHT: | |
| 222 return | |
| 223 | |
| 224 # we must not pass the top widget/border | |
| 225 if self._top_wids: | |
| 226 top = next(iter(self._top_wids)) | |
| 227 y_limit = top.y + top.height | |
| 228 | |
| 229 if top.height <= REMOVE_WID_LIMIT: | |
| 230 # we are in remove zone, we add visual hint for that | |
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231 if not self._split_del and self._top_wids: |
| 154 | 232 self._split_del = True |
| 233 self._draw_ellipse() | |
| 234 else: | |
| 235 if self._split_del: | |
| 236 self._split_del = False | |
| 237 self._draw_ellipse() | |
| 238 else: | |
| 239 y_limit = self.y + self.height | |
| 240 | |
| 241 if touch.y >= y_limit: | |
| 242 return | |
| 243 | |
| 244 # all right, we can change size | |
| 245 self.height = new_height | |
| 246 self.ellipse.pos = (self.ellipse.pos[0], touch.y - self.sp_zone/2) | |
| 247 | |
| 248 if not self._top_wids: | |
| 249 # we are the last widget on the top | |
| 250 # so we create a new widget | |
| 251 new_wid = self.parent.add_widget() | |
| 252 self._top_wids.add(new_wid) | |
| 253 new_wid._bottom_wids.add(self) | |
| 254 for w in self._right_wids: | |
| 255 new_wid._right_wids.add(w) | |
| 256 w._left_wids.add(new_wid) | |
| 257 for w in self._left_wids: | |
| 258 new_wid._left_wids.add(w) | |
| 259 w._right_wids.add(new_wid) | |
| 13 | 260 |
| 154 | 261 elif self._split == 'left': |
| 262 ori_width = touch.ud['ori_width'] | |
| 263 new_x = touch.x | |
| 264 new_width = ori_width - (touch.x - touch.ox) | |
| 265 | |
| 266 if new_width < MIN_WIDTH: | |
| 267 return | |
| 268 | |
| 269 # we must not pass the left widget/border | |
| 270 if self._left_wids: | |
| 271 left = next(iter(self._left_wids)) | |
| 272 x_limit = left.x | |
| 273 | |
| 274 if left.width <= REMOVE_WID_LIMIT: | |
| 275 # we are in remove zone, we add visual hint for that | |
|
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276 if not self._split_del and self._left_wids: |
| 154 | 277 self._split_del = True |
| 278 self._draw_ellipse() | |
| 279 else: | |
| 280 if self._split_del: | |
| 281 self._split_del = False | |
| 282 self._draw_ellipse() | |
| 283 else: | |
| 284 x_limit = self.x | |
| 285 | |
| 286 if new_x <= x_limit: | |
| 287 return | |
| 288 | |
| 289 # all right, we can change position/size | |
| 290 self.x = new_x | |
| 291 self.width = new_width | |
| 292 self.ellipse.pos = (touch.x - self.sp_zone/2, self.ellipse.pos[1]) | |
| 293 | |
| 294 if not self._left_wids: | |
| 295 # we are the last widget on the left | |
| 296 # so we create a new widget | |
| 297 new_wid = self.parent.add_widget() | |
| 298 self._left_wids.add(new_wid) | |
| 299 new_wid._right_wids.add(self) | |
| 300 for w in self._top_wids: | |
| 301 new_wid._top_wids.add(w) | |
| 302 w._bottom_wids.add(new_wid) | |
| 303 for w in self._bottom_wids: | |
| 304 new_wid._bottom_wids.add(w) | |
| 305 w._top_wids.add(new_wid) | |
| 306 | |
| 307 else: | |
| 308 raise Exception.InternalError('invalid _split value') | |
| 13 | 309 |
| 310 def on_touch_up(self, touch): | |
| 154 | 311 if self._split == 'None': |
| 312 return super(WHWrapper, self).on_touch_up(touch) | |
| 313 if self._split == 'top': | |
| 314 # we remove all top widgets in delete zone, | |
| 315 # and update there side widgets list | |
| 316 for top in self._top_wids.copy(): | |
| 317 if top.height <= REMOVE_WID_LIMIT: | |
|
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318 G.host._removeVisibleWidget(top.current_slide) |
| 154 | 319 for w in top._top_wids: |
| 320 w._bottom_wids.remove(top) | |
| 321 w._bottom_wids.update(top._bottom_wids) | |
| 322 for w in top._bottom_wids: | |
| 323 w._top_wids.remove(top) | |
| 324 w._top_wids.update(top._top_wids) | |
| 325 for w in top._left_wids: | |
| 326 w._right_wids.remove(top) | |
| 327 for w in top._right_wids: | |
| 328 w._left_wids.remove(top) | |
| 329 self.parent.remove_widget(top) | |
| 330 elif self._split == 'left': | |
| 331 # we remove all left widgets in delete zone, | |
| 332 # and update there side widgets list | |
| 333 for left in self._left_wids.copy(): | |
| 334 if left.width <= REMOVE_WID_LIMIT: | |
|
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335 G.host._removeVisibleWidget(left.current_slide) |
| 154 | 336 for w in left._left_wids: |
| 337 w._right_wids.remove(left) | |
| 338 w._right_wids.update(left._right_wids) | |
| 339 for w in left._right_wids: | |
| 340 w._left_wids.remove(left) | |
| 341 w._left_wids.update(left._left_wids) | |
| 342 for w in left._top_wids: | |
| 343 w._bottom_wids.remove(left) | |
| 344 for w in left._bottom_wids: | |
| 345 w._top_wids.remove(left) | |
| 346 self.parent.remove_widget(left) | |
| 347 self._split = 'None' | |
| 348 self.canvas.after.remove(self.ellipse) | |
| 349 del self.ellipse | |
| 13 | 350 |
|
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351 def clear_widgets(self): |
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352 current_slide = self.current_slide |
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353 if current_slide is not None: |
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354 G.host._removeVisibleWidget(current_slide) |
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355 |
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356 super().clear_widgets() |
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357 |
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358 self.screen_manager = None |
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359 self.carousel = None |
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360 self._clear_attributes() |
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361 |
| 154 | 362 def set_widget(self, wid, index=0): |
|
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363 assert len(self.children) == 0 |
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364 |
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365 if wid.collection_carousel or wid.global_screen_manager: |
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366 self.main_container = self |
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367 else: |
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368 self.main_container = ScrollView() |
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369 self.add_widget(self.main_container) |
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370 |
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371 if self.carousel is not None: |
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372 return self.carousel.add_widget(wid, index) |
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373 |
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374 if wid.global_screen_manager: |
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375 if self.screen_manager is None: |
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376 self.screen_manager = ScreenManager() |
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377 self.main_container.add_widget(self.screen_manager) |
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378 parent = Screen() |
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379 self.screen_manager.add_widget(parent) |
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380 self._former_screen_name = '' |
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381 self.screen_manager.bind(current=self.onScreenChange) |
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382 wid.screenManagerInit(self.screen_manager) |
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383 else: |
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384 parent = self.main_container |
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385 |
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386 if wid.collection_carousel: |
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387 # a Carousel is requested, and this is the first widget that we add |
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388 # so we need to create the carousel |
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389 self.carousel = Carousel( |
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390 direction = "right", |
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391 ignore_perpendicular_swipes = True, |
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392 loop = True, |
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393 ) |
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394 self._slides_update_lock = 0 |
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395 self.carousel.bind(current_slide=self.onSlideChange) |
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396 parent.add_widget(self.carousel) |
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397 self.carousel.add_widget(wid, index) |
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398 else: |
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399 # no Carousel requested, we add the widget as a direct child |
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400 parent.add_widget(wid) |
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401 G.host._addVisibleWidget(wid) |
|
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402 |
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403 def changeWidget(self, new_widget): |
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404 """Change currently displayed widget |
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405 |
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406 slides widgets will be updated |
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407 """ |
|
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408 if (self.carousel is not None |
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409 and self.carousel.current_slide.__class__ == new_widget.__class__): |
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410 # we have the same class, we reuse carousel and screen manager setting |
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411 |
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412 if self.carousel.current_slide != new_widget: |
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413 # slides update need to be blocked to avoid the update in onSlideChange |
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414 # which would mess the removal of current widgets |
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415 self._slides_update_lock += 1 |
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416 new_wid = None |
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417 for w in self.carousel.slides[:]: |
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418 if w.widget_hash == new_widget.widget_hash: |
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419 new_wid = w |
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420 continue |
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421 self.carousel.remove_widget(w) |
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422 if isinstance(w, quick_widgets.QuickWidget): |
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423 G.host.widgets.deleteWidget(w) |
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424 if new_wid is None: |
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425 new_wid = G.host.getOrClone(new_widget) |
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426 self.carousel.add_widget(new_wid) |
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427 self._updateHiddenSlides() |
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428 self._slides_update_lock -= 1 |
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429 |
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430 if self.screen_manager is not None: |
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431 self.screen_manager.clear_widgets([ |
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432 s for s in self.screen_manager.screens if s.name != '']) |
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433 new_wid.screenManagerInit(self.screen_manager) |
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434 else: |
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435 # else, we restart fresh |
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436 self.clear_widgets() |
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437 self.set_widget(G.host.getOrClone(new_widget)) |
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438 |
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439 def onScreenChange(self, screen_manager, new_screen): |
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440 try: |
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441 new_screen_wid = self.current_slide |
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442 except IndexError: |
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443 new_screen_wid = None |
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444 log.warning("Switching to a screen without children") |
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445 if new_screen == '' and self.carousel is not None: |
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446 # carousel may have been changed in the background, so we update slides |
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447 self._updateHiddenSlides() |
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448 former_screen_wid = self.former_screen_wid |
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449 if isinstance(former_screen_wid, cagou_widget.CagouWidget): |
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450 G.host._removeVisibleWidget(former_screen_wid) |
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451 if isinstance(new_screen_wid, cagou_widget.CagouWidget): |
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452 G.host._addVisibleWidget(new_screen_wid) |
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453 self._former_screen_name = new_screen |
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454 G.host.selected_widget = new_screen_wid |
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455 |
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456 def onSlideChange(self, handler, new_slide): |
|
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457 if self._former_slide is new_slide: |
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458 # FIXME: workaround for Kivy a95d67f (and above?), Carousel.current_slide |
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459 # binding now calls onSlideChange twice with the same widget (here |
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460 # "new_slide"). To be checked with Kivy team. |
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461 return |
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462 log.debug(f"Slide change: new_slide = {new_slide}") |
|
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463 if self._former_slide is not None: |
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464 G.host._removeVisibleWidget(self._former_slide, ignore_missing=True) |
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465 self._former_slide = new_slide |
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466 if self.carousel_active: |
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467 G.host.selected_widget = new_slide |
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468 if new_slide is not None: |
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469 G.host._addVisibleWidget(new_slide) |
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470 self._updateHiddenSlides() |
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471 |
|
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472 def hiddenList(self, visible_list, ignore=None): |
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473 """return widgets of same class as carousel current one, if they are hidden |
|
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474 |
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475 @param visible_list(list[QuickWidget]): widgets visible |
|
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476 @param ignore(QuickWidget, None): do no return this widget |
|
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477 @return (iter[QuickWidget]): widgets hidden |
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478 """ |
|
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479 # we want to avoid recreated widgets |
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480 added = [w.widget_hash for w in visible_list] |
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481 current_slide = self.carousel.current_slide |
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482 for w in G.host.widgets.getWidgets(current_slide.__class__, |
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483 profiles=current_slide.profiles): |
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484 wid_hash = w.widget_hash |
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485 if w in visible_list or wid_hash in added: |
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486 continue |
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487 if wid_hash == ignore.widget_hash: |
|
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488 continue |
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489 yield w |
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490 |
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491 def widgets_sort(self, widget): |
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492 """method used as key to sort the widgets |
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493 |
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494 order of the widgets when changing slide is affected |
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495 @param widget(QuickWidget): widget to sort |
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496 @return: a value which will be used for sorting |
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497 """ |
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498 try: |
| 312 | 499 return str(widget.target).lower() |
|
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500 except AttributeError: |
| 312 | 501 return str(list(widget.targets)[0]).lower() |
|
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502 |
|
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503 def _updateHiddenSlides(self): |
|
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504 """adjust carousel slides according to visible widgets""" |
|
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505 if self._slides_update_lock or not self.carousel_active: |
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506 return |
|
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507 current_slide = self.carousel.current_slide |
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508 if not isinstance(current_slide, quick_widgets.QuickWidget): |
|
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509 return |
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510 # lock must be used here to avoid recursions |
|
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511 self._slides_update_lock += 1 |
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512 visible_list = G.host.getVisibleList(current_slide.__class__) |
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513 # we ignore current_slide as it may not be visible yet (e.g. if an other |
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514 # screen is shown |
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515 hidden = list(self.hiddenList(visible_list, ignore=current_slide)) |
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516 slides_sorted = sorted(set(hidden + [current_slide]), key=self.widgets_sort) |
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517 to_remove = set(self.carousel.slides).difference({current_slide}) |
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518 for w in to_remove: |
| 154 | 519 self.carousel.remove_widget(w) |
|
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520 if hidden: |
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521 # no need to add more than two widgets (next and previous), |
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522 # as the list will be updated on each new visible widget |
|
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523 current_idx = slides_sorted.index(current_slide) |
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524 try: |
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525 next_slide = slides_sorted[current_idx+1] |
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526 except IndexError: |
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527 next_slide = slides_sorted[0] |
| 154 | 528 self.carousel.add_widget(G.host.getOrClone(next_slide)) |
|
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529 if len(hidden)>1: |
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530 previous_slide = slides_sorted[current_idx-1] |
| 154 | 531 self.carousel.add_widget(G.host.getOrClone(previous_slide)) |
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532 |
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533 self._slides_update_lock -= 1 |
|
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534 |
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535 |
| 154 | 536 class WidgetsHandlerLayout(Layout): |
| 537 count = 0 | |
| 13 | 538 |
| 154 | 539 def __init__(self, **kwargs): |
| 540 super(WidgetsHandlerLayout, self).__init__(**kwargs) | |
|
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541 self._layout_size = None # size used for the last layout |
| 154 | 542 fbind = self.fbind |
| 543 update = self._trigger_layout | |
| 544 fbind('children', update) | |
| 545 fbind('parent', update) | |
|
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546 fbind('size', self.adjust_prop) |
| 154 | 547 fbind('pos', update) |
| 13 | 548 |
| 14 | 549 @property |
| 550 def default_widget(self): | |
|
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551 return G.host.default_wid['factory'](G.host.default_wid, None, None) |
| 14 | 552 |
|
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553 def adjust_prop(self, handler, new_size): |
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554 """Adjust children proportion |
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555 |
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556 useful when this widget is resized (e.g. when going to fullscreen) |
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557 """ |
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558 if len(self.children) > 1: |
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559 old_width, old_height = self._layout_size |
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560 if not old_width or not old_height: |
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561 # we don't want division by zero |
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562 return self._trigger_layout(handler, new_size) |
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563 width_factor = float(self.width) / old_width |
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564 height_factor = float(self.height) / old_height |
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565 for child in self.children: |
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566 child.width *= width_factor |
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567 child.height *= height_factor |
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568 child.x *= width_factor |
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569 child.y *= height_factor |
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570 self._trigger_layout(handler, new_size) |
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571 |
| 154 | 572 def do_layout(self, *args): |
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573 self._layout_size = self.size[:] |
| 154 | 574 for child in self.children: |
| 575 # XXX: left must be calculated before right and bottom before top | |
| 576 # because they are the pos, and are used to caculate size (right and top) | |
| 577 # left | |
| 578 left = child._left_wid | |
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579 left_end_x = self.x-1 if left is None else left.right |
| 154 | 580 if child.x != left_end_x + 1 and child._split == "None": |
| 581 child.x = left_end_x + 1 | |
| 582 # right | |
| 583 right = child._right_wid | |
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584 right_x = self.right + 1 if right is None else right.x |
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585 if child.right != right_x - 1: |
| 154 | 586 child.width = right_x - child.x - 1 |
| 587 # bottom | |
| 588 bottom = child._bottom_wid | |
| 589 if bottom is None: | |
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590 if child.y != self.y: |
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591 child.y = self.y |
| 154 | 592 else: |
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593 if child.y != bottom.top + 1: |
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594 child.y = bottom.top + 1 |
| 154 | 595 # top |
| 596 top = child._top_wid | |
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597 top_y = self.top+1 if top is None else top.y |
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598 if child.top != top_y - 1: |
| 154 | 599 if child._split == "None": |
| 600 child.height = top_y - child.y - 1 | |
| 601 | |
| 602 def remove_widget(self, wid): | |
| 603 super(WidgetsHandlerLayout, self).remove_widget(wid) | |
| 604 log.debug("widget deleted ({})".format(wid._wid_idx)) | |
| 605 | |
| 606 def add_widget(self, wid=None, index=0): | |
| 607 WidgetsHandlerLayout.count += 1 | |
| 608 if wid is None: | |
| 609 wid = self.default_widget | |
| 610 wrapper = WHWrapper(_wid_idx=WidgetsHandlerLayout.count) | |
| 611 log.debug("WHWrapper created ({})".format(wrapper._wid_idx)) | |
| 612 wrapper.set_widget(wid) | |
| 613 super(WidgetsHandlerLayout, self).add_widget(wrapper, index) | |
| 614 return wrapper | |
| 615 | |
| 616 | |
| 617 class WidgetsHandler(WidgetsHandlerLayout): | |
| 618 | |
| 619 def __init__(self, **kw): | |
| 620 super(WidgetsHandler, self).__init__(**kw) | |
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621 self.add_widget() |