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| """Hoverable Behaviour (changing when the mouse is on the widget by O. Poyen. | |
| License: LGPL | |
| """ | |
| __author__ = 'Olivier POYEN' | |
| from kivy.properties import BooleanProperty, ObjectProperty | |
| from kivy.core.window import Window | |
| class HoverBehavior(object): | |
| """Hover behavior. | |
| :Events: | |
| `on_enter` | |
| Fired when mouse enter the bbox of the widget. | |
| `on_leave` | |
| Fired when the mouse exit the widget | |
| """ | |
| hovered = BooleanProperty(False) | |
| border_point= ObjectProperty(None) | |
| '''Contains the last relevant point received by the Hoverable. This can | |
| be used in `on_enter` or `on_leave` in order to know where was dispatched the event. | |
| ''' | |
| def __init__(self, **kwargs): | |
| self.register_event_type('on_enter') | |
| self.register_event_type('on_leave') | |
| Window.bind(mouse_pos=self.on_mouse_pos) | |
| super(HoverBehavior, self).__init__(**kwargs) | |
| def on_mouse_pos(self, *args): | |
| if not self.get_root_window(): | |
| return # do proceed if I'm not displayed <=> If have no parent | |
| pos = args[1] | |
| #Next line to_widget allow to compensate for relative layout | |
| inside = self.collide_point(*self.to_widget(*pos)) | |
| if self.hovered == inside: | |
| #We have already done what was needed | |
| return | |
| self.border_point = pos | |
| self.hovered = inside | |
| if inside: | |
| self.dispatch('on_enter') | |
| else: | |
| self.dispatch('on_leave') | |
| def on_enter(self): | |
| pass | |
| def on_leave(self): | |
| pass | |
| from kivy.factory import Factory | |
| Factory.register('HoverBehavior', HoverBehavior) | |
| if __name__=='__main__': | |
| from kivy.uix.floatlayout import FloatLayout | |
| from kivy.lang import Builder | |
| from kivy.uix.label import Label | |
| from kivy.base import runTouchApp | |
| class HoverLabel(Label, HoverBehavior): | |
| def on_enter(self, *args): | |
| print "You are in, through this point", self.border_point | |
| def on_leave(self, *args): | |
| print "You left through this point", self.border_point | |
| Builder.load_string(''' | |
| <HoverLabel>: | |
| text: "inside" if self.hovered else "outside" | |
| pos: 200,200 | |
| size_hint: None, None | |
| size: 100, 30 | |
| canvas.before: | |
| Color: | |
| rgb: 1,0,0 | |
| Rectangle: | |
| size: self.size | |
| pos: self.pos | |
| ''') | |
| fl = FloatLayout() | |
| fl.add_widget(HoverLabel()) | |
| runTouchApp(fl) |
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