sonist-gtk/ui/image_button.py

#!/usr/bin/env python3

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk

from .image import ScaleImage

class ImageButton(Gtk.Button):
  def __init__(self, filepath, width = 26, height = 26):
    Gtk.Button.__init__(self)

    self.width = width
    self.height = height
    self._image_path = None

    self.set_name('ImageButton')
    self.set_size_request(width, height)

    self.set_valign(Gtk.Align.CENTER)

    # 针对macos的设置, 但只解决了普通状态下的边框问题, 鼠标经过的样式还在
    self.set_relief(Gtk.ReliefStyle.NONE)

    self.set_image(filepath)

    css_provider = Gtk.CssProvider()
    style = f"""
      #ImageButton {{
        border: 0;
        border-radius: 50%;
        background-color: transparent;
        border-color:transparent;
        outline: transparent;
      }}
      #ImageButton:hover {{
        background-color: rgba(255,255,255,.1);
      }}
    """
    css_provider.load_from_data(style.encode('UTF-8'))

    context = self.get_style_context()
    path = context.get_path()
    context.add_provider(css_provider, Gtk.STYLE_PROVIDER_PRIORITY_USER)

  def set_image(self, filepath):
    if self._image_path == filepath:
      return
    
    self._image_path = filepath
    image = ScaleImage(filepath)
    image.resize(self.width, self.height)
    Gtk.Button.set_image(self, image)
    return self