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Simplify loading overlay implementation

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Kovid Goyal 2019-10-08 21:27:09 +05:30
parent 29899bec68
commit 32382b7b37
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 21 additions and 45 deletions
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66
src/calibre/gui2/viewer/overlay.py
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@ -4,37 +4,39 @@
from __future__ import absolute_import, division, print_function, unicode_literals from __future__ import absolute_import, division, print_function, unicode_literals
from PyQt5.Qt import QPainter, QPalette, QPoint, QRect, QTimer, QWidget, Qt, QFontInfo, QLabel from PyQt5.Qt import QWidget, Qt, QFontInfo, QLabel, QVBoxLayout
from calibre.gui2.progress_indicator import draw_snake_spinner from calibre.gui2.progress_indicator import ProgressIndicator
class LoadingOverlay(QWidget): class LoadingOverlay(QWidget):
def __init__(self, parent): def __init__(self, parent):
QWidget.__init__(self, parent) QWidget.__init__(self, parent)
self.l = l = QVBoxLayout(self)
self.pi = ProgressIndicator(self, 96, 80)
self.setVisible(False) self.setVisible(False)
self.label = QLabel(self) self.label = QLabel(self)
self.label.setText('<i>testing') self.label.setText('<i>testing')
self.label.setTextFormat(Qt.RichText) self.label.setTextFormat(Qt.RichText)
self.label.setAlignment(Qt.AlignTop | Qt.AlignHCenter) self.label.setAlignment(Qt.AlignTop | Qt.AlignHCenter)
self.resize(parent.size()) self.resize(parent.size())
self.setAutoFillBackground(True)
pal = self.palette()
col = pal.color(pal.Window)
col.setAlphaF(0.8)
pal.setColor(pal.Window, col)
self.setPalette(pal)
self.move(0, 0) self.move(0, 0)
self.angle = 0
self.timer = t = QTimer(self)
t.setInterval(60)
t.timeout.connect(self.tick)
f = self.font() f = self.font()
f.setBold(True) f.setBold(True)
fm = QFontInfo(f) fm = QFontInfo(f)
f.setPixelSize(int(fm.pixelSize() * 1.5)) f.setPixelSize(int(fm.pixelSize() * 1.5))
self.label.setFont(f) self.label.setFont(f)
self.calculate_rects() l.addStretch(10)
l.addWidget(self.pi)
def tick(self): l.addWidget(self.label)
self.angle -= 6 l.addStretch(10)
self.angle %= 360
self.update()
def __call__(self, msg=''): def __call__(self, msg=''):
self.label.setText(msg) self.label.setText(msg)
@ -47,41 +49,15 @@ class LoadingOverlay(QWidget):
def hide(self): def hide(self):
self.parent().web_view.setFocus(Qt.OtherFocusReason) self.parent().web_view.setFocus(Qt.OtherFocusReason)
self.pi.stop()
return QWidget.hide(self) return QWidget.hide(self)
def showEvent(self, ev): def showEvent(self, ev):
self.timer.start() # import time
# self.st = time.monotonic()
self.pi.start()
def hideEvent(self, ev): def hideEvent(self, ev):
self.timer.stop() # import time
# print(1111111, time.monotonic() - self.st)
def calculate_rects(self): self.pi.stop()
rect = self.rect()
self.spinner_rect = r = QRect(0, 0, 96, 96)
r.moveCenter(rect.center() - QPoint(0, r.height() // 2))
r = QRect(r)
r.moveTop(r.center().y() + 20 + r.height() // 2)
r.setLeft(0), r.setRight(self.width())
self.label.setGeometry(r)
def resizeEvent(self, ev):
self.calculate_rects()
return QWidget.resizeEvent(self, ev)
def do_paint(self, painter):
pal = self.palette()
color = pal.color(QPalette.Window)
color.setAlphaF(0.8)
painter.fillRect(self.rect(), color)
draw_snake_spinner(painter, self.spinner_rect, self.angle, pal.color(QPalette.Window), pal.color(QPalette.WindowText))
def paintEvent(self, ev):
painter = QPainter(self)
painter.setRenderHints(QPainter.Antialiasing | QPainter.TextAntialiasing)
try:
self.do_paint(painter)
except Exception:
import traceback
traceback.print_exc()
finally:
painter.end()