brush_settings_dialog.py

from PyQt5.QtWidgets import QDialog, QColorDialog
from PyQt5.QtGui import QColor
from PyQt5 import uic


class BrushSettingsDialog(QDialog):
    def __init__(self, mouse_pos, current_settings):
        super().__init__()
        uic.loadUi('brush_settings_dialog.ui', self)
        self.move(mouse_pos)

        self.spin_brush_size.setValue(current_settings.get('size'))
        self.btn_brush_color.setStyleSheet(f'background-color: {current_settings.get("color").name()}')
        self.btn_brush_color.setText(current_settings.get("color").name())

        self.color = current_settings.get('color')

        self.btn_brush_color.clicked.connect(self.select_color)
        self.btn_apply.clicked.connect(self.close)

    def select_color(self):
        color = QColorDialog.getColor()
        if color.isValid():
            # get hex color
            self.color = QColor(*color.getRgb())

            self.btn_brush_color.setStyleSheet(f'background-color: {color.name()};')
            self.btn_brush_color.setText(color.name())

    def get_settings(self):
        return {
            'color': self.color if self.color else None,
            'size': self.spin_brush_size.value()
        }