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from qtpy.QtWidgets import QWidget, QStyle, QSlider, QStyle, QStyleOptionSlider
from qtpy.QtCore import Qt, QPropertyAnimation, QRect, QRectF, Signal, QPoint, Property
from qtpy.QtGui import QFontMetrics, QMouseEvent, QPainter, QFontMetrics, QColor
from .helper import isDarkTheme, themeColor
from utils import shared as C
def slider_subcontrol_rect(r: QRect, widget: QWidget):
if widget.orientation() == Qt.Orientation.Horizontal:
y = widget.height() // 4
h = y * 2
r = QRect(r.x(), y, r.width(), h)
else:
x = widget.width() // 4
w = x * 2
r = QRect(x, r.y(), w, r.height())
# seems a bit dumb, otherwise the handle is buggy
if r.height() < r.width():
r.setHeight(r.width())
else:
r.setWidth(r.height())
return r
class SliderHandle(QWidget):
""" Slider handle """
pressed = Signal()
released = Signal()
def __init__(self, parent: QSlider):
super().__init__(parent=parent)
self.setFixedSize(22, 22)
self._radius = 5
self.radiusAni = QPropertyAnimation(self, b'radius', self)
self.radiusAni.setDuration(100)
@Property(int)
def radius(self):
return self._radius
@radius.setter
def radius(self, r):
self._radius = r
self.update()
def enterEvent(self, e):
self._startAni(6)
def leaveEvent(self, e):
self._startAni(5)
def mousePressEvent(self, e):
self._startAni(4)
self.pressed.emit()
def mouseReleaseEvent(self, e):
self._startAni(6)
self.released.emit()
def _startAni(self, radius):
self.radiusAni.stop()
self.radiusAni.setStartValue(self.radius)
self.radiusAni.setEndValue(radius)
self.radiusAni.start()
def paintEvent(self, e):
painter = QPainter(self)
painter.setRenderHints(QPainter.RenderHint.Antialiasing)
painter.setPen(Qt.PenStyle.NoPen)
# draw outer circle
isDark = isDarkTheme()
painter.setPen(QColor(0, 0, 0, 90 if isDark else 25))
painter.setBrush(QColor(69, 69, 69) if isDark else QColor(225, 228, 235))
painter.drawEllipse(self.rect().adjusted(1, 1, -1, -1))
# draw innert circle
painter.setBrush(themeColor())
painter.drawEllipse(QPoint(11, 11), self.radius, self.radius)
class Slider(QSlider):
""" A slider can be clicked
modified from https://github.com/zhiyiYo/PyQt-Fluent-Widgets
Constructors
------------
* Slider(`parent`: QWidget = None)
* Slider(`orient`: Qt.Orientation, `parent`: QWidget = None)
"""
clicked = Signal(int)
def __init__(self, orientation: Qt.Orientation, parent: QWidget = None):
super().__init__(orientation, parent=parent)
self.hovering = False
self._postInit()
def _postInit(self):
self.handle = SliderHandle(self)
self._pressedPos = QPoint()
self.setOrientation(self.orientation())
self.handle.pressed.connect(self.sliderPressed)
self.handle.released.connect(self.sliderReleased)
self.valueChanged.connect(self._adjustHandlePos)
def setOrientation(self, orientation: Qt.Orientation) -> None:
super().setOrientation(orientation)
if orientation == Qt.Orientation.Horizontal:
self.setMinimumHeight(22)
else:
self.setMinimumWidth(22)
def mousePressEvent(self, e: QMouseEvent):
self._pressedPos = e.pos()
self.setValue(self._posToValue(e.pos()))
self.clicked.emit(self.value())
def mouseMoveEvent(self, e: QMouseEvent):
self.setValue(self._posToValue(e.pos()))
self._pressedPos = e.pos()
self.sliderMoved.emit(self.value())
@property
def grooveLength(self):
l = self.width() if self.orientation() == Qt.Orientation.Horizontal else self.height()
return l - self.handle.width()
def _adjustHandlePos(self):
total = max(self.maximum() - self.minimum(), 1)
delta = int((self.value() - self.minimum()) / total * self.grooveLength)
if self.orientation() == Qt.Orientation.Vertical:
self.handle.move(0, delta)
else:
self.handle.move(delta, 0)
def _posToValue(self, pos: QPoint):
pd = self.handle.width() / 2
gs = max(self.grooveLength, 1)
v = pos.x() if self.orientation() == Qt.Orientation.Horizontal else pos.y()
return int((v - pd) / gs * (self.maximum() - self.minimum()) + self.minimum())
def paintEvent(self, e):
painter = QPainter(self)
painter.setRenderHints(QPainter.RenderHint.Antialiasing)
painter.setPen(Qt.PenStyle.NoPen)
painter.setBrush(QColor(255, 255, 255, 115) if isDarkTheme() else QColor(0, 0, 0, 100))
if self.orientation() == Qt.Orientation.Horizontal:
self._drawHorizonGroove(painter)
else:
self._drawVerticalGroove(painter)
if hasattr(self, 'draw_content') and self.hovering:
# its a bad idea to display text like this, but I leave it as it is for now
option = QStyleOptionSlider()
self.initStyleOption(option)
rect = self.style().subControlRect(
QStyle.CC_Slider, option, QStyle.SC_SliderHandle, self)
rect = slider_subcontrol_rect(rect, self)
value = self.value()
value_str = str(value)
painter.setPen(QColor(*C.SLIDERHANDLE_COLOR,255))
font = painter.font()
font.setPointSizeF(8)
fm = QFontMetrics(font)
painter.setFont(font)
is_hor = self.orientation() == Qt.Orientation.Horizontal
if is_hor:
value_w = fm.boundingRect(value_str).width()
dx = self.width() - value_w
else:
dx = dy = 0
dy = self.height() - fm.height() + fm.descent()
painter.drawText(dx, dy, value_str)
if self.draw_content is not None:
painter.drawText(0, dy, self.draw_content, )
def _drawHorizonGroove(self, painter: QPainter):
w, r = self.width(), self.handle.width() / 2
painter.drawRoundedRect(QRectF(r, r-2, w-r*2, 4), 2, 2)
if self.maximum() - self.minimum() == 0:
return
painter.setBrush(themeColor())
aw = (self.value() - self.minimum()) / (self.maximum() - self.minimum()) * (w - r*2)
painter.drawRoundedRect(QRectF(r, r-2, aw, 4), 2, 2)
def _drawVerticalGroove(self, painter: QPainter):
h, r = self.height(), self.handle.width() / 2
painter.drawRoundedRect(QRectF(r-2, r, 4, h-2*r), 2, 2)
if self.maximum() - self.minimum() == 0:
return
painter.setBrush(themeColor())
ah = (self.value() - self.minimum()) / (self.maximum() - self.minimum()) * (h - r*2)
painter.drawRoundedRect(QRectF(r-2, r, 4, ah), 2, 2)
def resizeEvent(self, e):
self._adjustHandlePos()
def enterEvent(self, event) -> None:
self.hovering = True
self.update()
return super().enterEvent(event)
def leaveEvent(self, event) -> None:
self.hovering = False
self.update()
return super().leaveEvent(event)
class PaintQSlider(Slider):
mouse_released = Signal()
def __init__(self, draw_content = None, orientation=Qt.Orientation.Horizontal, *args, **kwargs):
super().__init__(orientation, *args, **kwargs)
self.draw_content = draw_content
self.pressed: bool = False
def mousePressEvent(self, event: QMouseEvent) -> None:
if event.button() == Qt.MouseButton.LeftButton:
self.pressed = True
return super().mousePressEvent(event)
def mouseReleaseEvent(self, event: QMouseEvent) -> None:
if event.button() == Qt.MouseButton.LeftButton:
self.pressed = False
self.mouse_released.emit()
return super().mouseReleaseEvent(event)
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