132 lines
5.2 KiB
Python
132 lines
5.2 KiB
Python
from typing import Optional, Tuple, List
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from PyQt5.QtCore import Qt, QEvent, QObject
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from PyQt5.QtGui import QPainter, QPixmap, QFontMetrics, QImage, QBrush, QColor, QShowEvent
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from PyQt5.QtWidgets import QLabel
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from rare.widgets.image_widget import ImageWidget
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class ProgressLabel(QLabel):
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def __init__(self, parent=None):
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super(ProgressLabel, self).__init__(parent=parent)
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if self.parent() is not None:
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self.parent().installEventFilter(self)
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self.setObjectName(type(self).__name__)
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self.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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self.setFrameStyle(QLabel.StyledPanel)
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def __center_on_parent(self):
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fm = QFontMetrics(self.font())
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rect = fm.boundingRect(" 100% ")
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rect.moveCenter(self.parent().contentsRect().center())
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self.setGeometry(rect)
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def event(self, e: QEvent) -> bool:
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if e.type() == QEvent.ParentAboutToChange:
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if self.parent() is not None:
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self.parent().removeEventFilter(self)
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if e.type() == QEvent.ParentChange:
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if self.parent() is not None:
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self.parent().installEventFilter(self)
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return super().event(e)
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def showEvent(self, a0: QShowEvent) -> None:
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if a0.spontaneous():
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return super().showEvent(a0)
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self.__center_on_parent()
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super().showEvent(a0)
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def eventFilter(self, a0: QObject, a1: QEvent) -> bool:
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if a0 is self.parent() and a1.type() == QEvent.Resize:
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self.__center_on_parent()
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return a0.event(a1)
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return False
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@staticmethod
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def calculateColors(image: QImage) -> Tuple[QColor, QColor]:
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color: List[int] = [0, 0, 0]
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# take the two diagonals of the center square section
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min_d = min(image.width(), image.height())
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origin_w = (image.width() - min_d) // 2
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origin_h = (image.height() - min_d) // 2
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for x, y in zip(range(origin_w, min_d), range(origin_h, min_d)):
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pixel = image.pixelColor(x, y).getRgb()
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color = list(map(lambda t: sum(t) // 2, zip(pixel[:3], color)))
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# take the V component of the HSV color
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fg_color = QColor(0, 0, 0) if QColor(*color).value() < 127 else QColor(255, 255, 255)
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bg_color = QColor(*map(lambda c: 255 - c, color))
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return bg_color, fg_color
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def setStyleSheetColors(self, bg: QColor, fg: QColor, brd: QColor):
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sheet = (
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f"QLabel#{type(self).__name__} {{"
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f"background-color: rgba({bg.red()}, {bg.green()}, {bg.blue()}, 65%);"
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f"color: rgb({fg.red()}, {fg.green()}, {fg.blue()});"
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f"border-color: rgb({brd.red()}, {brd.green()}, {brd.blue()});"
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f"}}"
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)
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self.setStyleSheet(sheet)
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class LibraryWidget(ImageWidget):
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def __init__(self, parent=None) -> None:
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super(LibraryWidget, self).__init__(parent)
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self.progress_label = ProgressLabel(self)
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self.progress_label.setVisible(False)
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self._color_pixmap: Optional[QPixmap] = None
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self._gray_pixmap: Optional[QPixmap] = None
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# lk: keep percentage to not over-generate the image
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self._progress: int = -1
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def progressPixmap(self, color: QPixmap, gray: QPixmap, progress: int) -> QPixmap:
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"""
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Paints the color image over the gray images based on progress percentage
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@param color:
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@param gray:
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@param progress:
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@return:
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"""
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device = QPixmap(color.size())
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painter = QPainter(device)
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painter.setRenderHint(QPainter.SmoothPixmapTransform, self._smooth_transform)
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painter.setCompositionMode(QPainter.CompositionMode_Source)
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# lk: Vertical loading
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# prog_h = (device.height() * progress // 100)
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# brush = QBrush(gray)
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# painter.fillRect(device.rect().adjusted(0, 0, 0, -prog_h), brush)
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# brush.setTexture(color)
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# painter.fillRect(device.rect().adjusted(0, device.height() - prog_h, 0, 0), brush)
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# lk: Horizontal loading
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prog_w = device.width() * progress // 100
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brush = QBrush(gray)
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painter.fillRect(device.rect().adjusted(prog_w, 0, 0, 0), brush)
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brush.setTexture(color)
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painter.fillRect(device.rect().adjusted(0, 0, prog_w - device.width(), 0), brush)
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painter.end()
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device.setDevicePixelRatio(color.devicePixelRatioF())
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return device
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def showProgress(self, color_pm: QPixmap, gray_pm: QPixmap) -> None:
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self._color_pixmap = color_pm
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self._gray_pixmap = gray_pm
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bg_color, fg_color = self.progress_label.calculateColors(color_pm.toImage())
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self.progress_label.setStyleSheetColors(bg_color, fg_color, fg_color)
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self.progress_label.setVisible(True)
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self.updateProgress(0)
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def updateProgress(self, progress: int):
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self.progress_label.setText(f"{progress:02}%")
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if progress > self._progress:
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self._progress = progress
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self.setPixmap(self.progressPixmap(self._color_pixmap, self._gray_pixmap, progress))
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def hideProgress(self, stopped: bool):
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self._color_pixmap = None
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self._gray_pixmap = None
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self.progress_label.setVisible(stopped)
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self._progress = -1
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