Untitled_130.py

Untitled_130.py

import ui,ctypes,string
from objc_util import *
UIFont=ObjCClass('UIFont')
import sys
c.CTFontCreatePathForGlyph.restype = c_void_p
c.CTFontCreatePathForGlyph.argtypes = [c_void_p, c_void_p, c_void_p]
createPath=c.CTFontCreatePathForGlyph
glyphs_list=[]

for w in [-1, -0.5, 0., 0.5, 1]:
	f=UIFont.systemFontOfSize_weight_(512,w)
	glph=f.glyphWithName_('A')
	glyphs_list.append(UIBezierPath.bezierPathWithCGPath_(ObjCInstance(createPath(f,glph,None))))

#choose any two glyphs, but must have same number of points, in same order
# this works very well with original glyphpath, not so much with ondevice generated ones
glyphs_list=[glyphs_list[2],glyphs_list[3]]


def _get_CGColor(color):
    """Get a CGColor from a wide range of formats."""
    return UIColor.colorWithRed_green_blue_alpha_(
        *ui.parse_color(color)
    ).CGColor()

class AniPathView(ui.View):
    '''animates a path based on touch'''
    def __init__(self, path, color="#21abed",
                 line_width=1, line_color="#0f210f",
                 *args, **kwargs):
        super().__init__(self, *args, **kwargs)
        self.bg_color='white'
        # Draw the full path on one layer
        self._layer = ObjCClass("CAShapeLayer").new()
        self._layer.setStrokeColor_(_get_CGColor(line_color))
        self._layer.setFillColor_(_get_CGColor(color))
        self._layer.setLineWidth_(line_width)
        self._layer.path=path
        self.setupani()
        self._path=path
        self.lasti=0
        self.setup_layer()
    def setup_layer(self):
        ObjCInstance(self).layer().addSublayer_(self._layer)
        b=ObjCInstance(self).layer().bounds()
        b.size.height-=44
        b.origin.y=44
        self._layer.frame=b
        
    def curpath(self):
        try:
           self._layer.presentationLayer().path()
        except AttributeError:
           return self._path
    def touch_began(self,touch):
        i=int(touch.location.x/self.width*len(glyphs_list))
        p=glyphs_list[i%len(glyphs_list)]
        #print(i)
        self._layer.timeOffset=touch.location.x/self.width
        #self.setPath(p.CGPath())
    def touch_moved(self,touch):
        i=int(touch.location.x/self.width*len(glyphs_list))
        '''if not self.lasti == i:
           self.lasti=i
           p=glyphs_list[i%len(glyphs_list)]
           self.setPath(p.CGPath(),0.2)'''
        self._layer.timeOffset=(touch.location.x/self.width)
    @on_main_thread
    def setupani(self):
       animation=ObjCClass('CABasicAnimation').animationWithKeyPath('path')
       animation.fromValue = glyphs_list[0].CGPath()
       animation.toValue = glyphs_list[1].CGPath()
       animation.removedOnCompletion=False
       animation.duration=1.
       self._layer.speed=0.
       self._layer.timeOffset=0.
       self._layer.addAnimation(animation, forKey='a')

       self.a=animation
       #return self.curpath()
    def setPath(self,path,duration=0.3):
       animation=ObjCClass('CABasicAnimation').animationWithKeyPath('path')
       animation.fromValue = self.curpath()
       animation.duration=duration
       self._path = path
       self._layer.addAnimation(animation, forKey=None)
       self._layer.path=self._path
       #print(self._path)

pv=AniPathView(glyphs_list[0].CGPath())

	
pv.present()
#pv.setupani(0)