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@tshirtman
Created October 29, 2019 23:10
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from kivy.app import App
from kivy.lang import Builder
from kivy.factory import Factory
KV = '''
#:import A kivy.animation.Animation
<AutoScaleLabel@Label>:
scale: 1
step: self.font_size // 2
interpolate: True
_params: divmod(self.scale, self.step or 1)
font_size: max(0, self._params[0] * (self.step or 1))
_scale_factor: (1 + self._params[1] / (self.font_size or 1)) if self.interpolate else 1
canvas.before:
PushMatrix:
Scale:
origin: self.center
xyz: self._scale_factor or 1, self._scale_factor or 1, 1
canvas.after:
PopMatrix:
FloatLayout:
BoxLayout:
orientation: 'vertical'
AutoScaleLabel:
id: label
text: text.text
interpolate: interpolate.active
# scale: slider.value
GridLayout:
cols: 2
size_hint_y: None
height: self.minimum_height
row_default_height: 30
row_force_default: True
Label:
text: 'text'
TextInput:
id: text
text: 'test'
Label:
text: 'font_size'
Slider:
id: slider
min: .1
max: 500
on_value:
if animate.active: (A.cancel_all(label, 'scale'), A(scale=self.value, t=easing.text).start(label))
else: label.scale = self.value
Label:
text: 'interpolate?'
CheckBox:
id: interpolate
Label:
text: 'animate?'
CheckBox:
id: animate
Label:
text: 'easing'
Spinner:
id: easing
text: 'linear'
values: 'linear', 'out_quad', 'out_elastic', 'out_circ'
'''
class Application(App):
def build(self):
return Builder.load_string(KV)
if __name__ == "__main__":
Application().run()
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