Source code for libqtile.widget.image

import os
import cairocffi

from . import base
from .. import bar

[docs]class Image(base._Widget, base.MarginMixin): """ Display a PNG image on the bar. """ defaults = [ ("scale", True, "Enable/Disable image scaling"), ("filename", None, "PNG Image filename. Can contain '~'"), ] def __init__(self, width=bar.CALCULATED, **config): base._Widget.__init__(self, width, **config) self.add_defaults(Image.defaults) self.add_defaults(base.MarginMixin.defaults) # make the default 0 instead self._widget_defaults["margin"] = 0 def _configure(self, qtile, bar): base._Widget._configure(self, qtile, bar) if not self.filename: raise ValueError("Filename not set!") self.filename = os.path.expanduser(self.filename) try: self.image = cairocffi.ImageSurface.create_from_png(self.filename) except MemoryError: raise ValueError("The image '%s' doesn't seem to be a valid PNG" % (self.filename)) self.pattern = cairocffi.SurfacePattern(self.image) self.image_width = self.image.get_width() self.image_height = self.image.get_height() if self.scale: new_height = self.bar.height - (self.margin_y * 2) if new_height and self.image_height != new_height: scaler = cairocffi.Matrix() sp = self.image_height / float(new_height) self.image_height = new_height self.image_width = int(self.image_width / sp) scaler.scale(sp, sp) self.pattern.set_matrix(scaler) def draw(self): self.drawer.clear(self.bar.background) self.drawer.ctx.save() self.drawer.ctx.translate(self.margin_x, self.margin_y) self.drawer.ctx.set_source(self.pattern) self.drawer.ctx.paint() self.drawer.ctx.restore() self.drawer.draw(self.offset, self.width) def calculate_width(self): return self.image_width + (self.margin_x * 2)