Forum Archive

Just a function to draw text in a circle with some modifiers.
Nothing earth shattering about this. Is more food for thought for beginners like me.

# coding: utf-8
import ui
# Pythonista Forum - @Phuket2
# for @ccc , should be pep8 ok and pyflakes :)

# No break through here. just expanded on the Pythonista help
# code for ui.ImageContext


# draw text in a circle, and return a ui.image
def text_in_circle(r,
                            text,
                            text_color = 'white',
                            circle_color = 'teal',
                            circle_alpha = 1.0,
                            font_name = 'Arial Rounded MT Bold',
                            inset_percent = 0):

    '''
        text_in_circle - * denotes a param
        ==============
        *r-ui.Rect or tuple (0, 0, 0, 0) - the bounding rect for the circle.

        *text-text to draw in the circle

        *text_color-color of the text drawn inside the circle

        *circle_color-color of the circle

        *circle_alpha-alpha setting applied to circle color. Note, did this
        for a reason. easier to use string names for colors!

        *font_name-the font used to render the *text

        *inset_percent-reduces *r by a percentage for l,t,w,h for possible
        better placement of the text inside the circle. a.k.a margin

        RETURNS - a rendered uiImage

    '''

    # this inner function does not need to be here, was just to keep it
    # all together
    def get_max_fontsize(r, text, font_name, inset_rect = ui.Rect()):
        r1 = ui.Rect(*r).inset(*inset_rect)
        for i in xrange(5, 1000):
            w, h = ui.measure_string(text, max_width=0,
                        font=(font_name, i), alignment=ui.ALIGN_LEFT,
                        line_break_mode=ui.LB_TRUNCATE_TAIL)

            if w > r1.width or h > r1.height:
                return (i - 1, ui.Rect(r1.x, r1.y, w, h))

    # tuple or Rect? tried issubclass but had problems
    if not type(r) is ui.Rect:
        r = ui.Rect(*r)

    inset_rect = ui.Rect(r.x * inset_percent, r.y * inset_percent,
                    r.width * inset_percent, r.height * inset_percent)

    with ui.ImageContext(r.width, r.height) as ctx:
        oval = ui.Path.oval(r.x, r.y, r.width, r.height)
        c = ui.parse_color(circle_color)
        nc = (c[0], c[1], c[2], circle_alpha)       # color with alpha
        fs, dest_r = get_max_fontsize(r, text, font_name, inset_rect = inset_rect)
        dest_r.center(r.center())
        with ui.GState():
            ui.set_color(nc)
            oval.fill()
            ui.draw_string(text, rect=dest_r,
                                font=(font_name, fs), color=text_color,
                                alignment=ui.ALIGN_LEFT,
                                line_break_mode=ui.LB_TRUNCATE_TAIL)
        return ctx.get_image()


if __name__ == '__main__':
    r = (0, 0, 200, 200)

    img = text_in_circle(r = r, text = 'IJ', circle_alpha = 1)
    # to the console, test
    img.show()

    v = ui.View(frame = (0, 0, img.size.width, img.size.height))
    img_v = ui.ImageView(frame = v.frame)
    img_v.image = img
    v.add_subview(img_v)
    v.present('sheet')

Nice, copied in my examples folder

@cvp , great. As you can its just the start of something , but it's a often used icon for the want of a better word in iOS

Lol, the text was not supposed to be my surname 😱 Something like 'IJ'. Oh well shit happens