Boris Yumankulov
5d0185b1b4
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Signed-off-by: Boris Yumankulov <boria138@altlinux.org>
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
import time
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from PySide6.QtCore import QRect
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from PySide6.QtGui import QPainter, QPen, QBrush, Qt, QColor, QConicalGradient
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from PySide6.QtWidgets import QWidget
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class Preloader(QWidget):
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def __init__(self, speed=180.0, line_line_width=20, color=QColor(0, 120, 215), parent=None):
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super().__init__(parent)
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self.setFixedSize(150, 150)
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self._speed = speed
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self._line_width = line_line_width
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self._color1 = color
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self._color2 = QColor(color.red(), color.green(), color.blue(), 0)
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self._start_time = time.time()
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def showEvent(self, event):
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self._start_time = time.time()
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def paintEvent(self, event):
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rect = self._get_preloader_rect()
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center = rect.center()
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painter = QPainter(self)
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painter.setRenderHint(QPainter.RenderHint.Antialiasing)
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painter.setPen(self._get_pen())
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painter.translate(center)
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painter.rotate(self._get_angle())
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painter.translate(-center)
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painter.drawArc(rect, 0, 270 * 16)
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self.update()
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def _get_pen(self) -> QPen:
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gradient = QConicalGradient()
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gradient.setCenter(self.rect().center())
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gradient.setColorAt(0, self._color1)
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gradient.setColorAt(1, self._color2)
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pen = QPen(QBrush(gradient), self._line_width)
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pen.setCapStyle(Qt.PenCapStyle.RoundCap)
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return pen
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def _get_angle(self) -> float:
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duration = time.time() - self._start_time
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return (self._speed * duration) % 360.0
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def _get_preloader_rect(self) -> QRect:
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size = self._line_width // 2
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rect = self.rect()
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rect.adjust(size, size, -size, -size)
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return rect
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