Mercurial > libervia-desktop-kivy
comparison cagou/core/widgets_handler.py @ 171:27b4ceb977c7
widgets handler: keep proportion on resize
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sun, 29 Apr 2018 13:10:14 +0200 |
| parents | f4522b7c3318 |
| children | 9835cafbd909 |
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| 170:f4522b7c3318 | 171:27b4ceb977c7 |
|---|---|
| 386 class WidgetsHandlerLayout(Layout): | 386 class WidgetsHandlerLayout(Layout): |
| 387 count = 0 | 387 count = 0 |
| 388 | 388 |
| 389 def __init__(self, **kwargs): | 389 def __init__(self, **kwargs): |
| 390 super(WidgetsHandlerLayout, self).__init__(**kwargs) | 390 super(WidgetsHandlerLayout, self).__init__(**kwargs) |
| 391 self._layout_size = None # size used for the last layout | |
| 391 fbind = self.fbind | 392 fbind = self.fbind |
| 392 update = self._trigger_layout | 393 update = self._trigger_layout |
| 393 fbind('children', update) | 394 fbind('children', update) |
| 394 fbind('parent', update) | 395 fbind('parent', update) |
| 395 fbind('size', update) | 396 fbind('size', self.adjust_prop) |
| 396 fbind('pos', update) | 397 fbind('pos', update) |
| 397 | 398 |
| 398 @property | 399 @property |
| 399 def default_widget(self): | 400 def default_widget(self): |
| 400 return G.host.default_wid['factory'](G.host.default_wid, None, None) | 401 return G.host.default_wid['factory'](G.host.default_wid, None, None) |
| 401 | 402 |
| 403 def adjust_prop(self, handler, new_size): | |
| 404 """Adjust children proportion | |
| 405 | |
| 406 useful when this widget is resized (e.g. when going to fullscreen) | |
| 407 """ | |
| 408 if len(self.children) > 1: | |
| 409 old_width, old_height = self._layout_size | |
| 410 if not old_width or not old_height: | |
| 411 # we don't want division by zero | |
| 412 return self._trigger_layout(handler, new_size) | |
| 413 width_factor = float(self.width) / old_width | |
| 414 height_factor = float(self.height) / old_height | |
| 415 for child in self.children: | |
| 416 child.width *= width_factor | |
| 417 child.height *= height_factor | |
| 418 child.x *= width_factor | |
| 419 child.y *= height_factor | |
| 420 self._trigger_layout(handler, new_size) | |
| 421 | |
| 402 def do_layout(self, *args): | 422 def do_layout(self, *args): |
| 423 self._layout_size = self.size[:] | |
| 403 for child in self.children: | 424 for child in self.children: |
| 404 # XXX: left must be calculated before right and bottom before top | 425 # XXX: left must be calculated before right and bottom before top |
| 405 # because they are the pos, and are used to caculate size (right and top) | 426 # because they are the pos, and are used to caculate size (right and top) |
| 406 # left | 427 # left |
| 407 left = child._left_wid | 428 left = child._left_wid |