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Simplify code to draw snake spinner

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This commit is contained in:
Kovid Goyal 2016-10-13 07:39:31 +05:30
parent 21763cf0b1
commit a26462d633
1 changed files with 11 additions and 9 deletions
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20
src/calibre/gui2/progress_indicator/__init__.py
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@ -5,7 +5,6 @@
from __future__ import (unicode_literals, division, absolute_import,
print_function)
import math
from PyQt5.Qt import (
Qt, QWidget, QSizePolicy, QSize, QRect, QConicalGradient, QPen, QBrush,
QPainter, QTimer, QVBoxLayout, QLabel, QStackedWidget, QDialog
@ -24,21 +23,16 @@ def draw_snake_spinner(painter, rect, angle, light, dark):
disc_width = max(4, rect.width() // 10)
drawing_rect = QRect(rect.x() + disc_width, rect.y() + disc_width, rect.width() - 2 * disc_width, rect.height() - 2 *disc_width)
try:
angle_for_width = math.degrees(math.atan2(1.3 * disc_width, drawing_rect.width()))
except ZeroDivisionError:
angle_for_width = 5
gradient = QConicalGradient(drawing_rect.center(), angle - angle_for_width)
gap = 20 # degrees
gradient = QConicalGradient(drawing_rect.center(), angle - gap // 2)
gradient.setColorAt(1, light)
gradient.setColorAt(0, dark)
painter.setPen(QPen(light, disc_width))
painter.drawArc(drawing_rect, 0, 360 * 16)
pen = QPen(QBrush(gradient), disc_width)
pen.setCapStyle(Qt.RoundCap)
painter.setPen(pen)
painter.drawArc(drawing_rect, angle * 16, (360 - 2 * angle_for_width) * 16)
painter.drawArc(drawing_rect, angle * 16, (360 - gap) * 16)
class ProgressSpinner(QWidget):
@ -163,6 +157,14 @@ class WaitStack(QStackedWidget):
self.wp.stop()
self.setCurrentWidget(self.after)
@property
def msg(self):
return self.wp.msg
@msg.setter
def msg(self, val):
self.wp.msg = val
if __name__ == '__main__':
from calibre.gui2 import Application
app = Application([])