File size: 13,265 Bytes
b2fbb41 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 |
from qtpy.QtWidgets import QApplication, QAbstractScrollArea, QGraphicsOpacityEffect, QWidget, QVBoxLayout, QHBoxLayout
from qtpy.QtCore import QEvent, Qt, QPropertyAnimation, QTimer, Signal, QPoint, Property, QAbstractAnimation
from qtpy.QtGui import QMouseEvent, QPainter, QColor
class ScrollBarGroove(QWidget):
""" Scroll bar groove """
def __init__(self, orient: Qt.Orientation, parent):
super().__init__(parent=parent)
if orient == Qt.Vertical:
self.setFixedWidth(12)
self.setLayout(QVBoxLayout(self))
self.layout().addStretch(1)
self.layout().setContentsMargins(0, 3, 0, 3)
else:
self.setFixedHeight(12)
self.setLayout(QHBoxLayout(self))
self.layout().addStretch(1)
self.layout().setContentsMargins(3, 0, 3, 0)
self.opacityEffect = QGraphicsOpacityEffect(self)
self.opacityAni = QPropertyAnimation(self.opacityEffect, b'opacity', self)
self.setGraphicsEffect(self.opacityEffect)
self.opacityEffect.setOpacity(0)
def fadeIn(self):
self.opacityAni.setEndValue(1)
self.opacityAni.setDuration(150)
self.opacityAni.start()
def fadeOut(self):
self.opacityAni.setEndValue(0)
self.opacityAni.setDuration(150)
self.opacityAni.start()
def paintEvent(self, e):
painter = QPainter(self)
painter.setRenderHints(QPainter.Antialiasing)
painter.setPen(Qt.NoPen)
painter.setBrush(QColor(0, 0, 0, 30))
painter.drawRoundedRect(self.rect(), 6, 6)
# ScrollBarHandle, ScrollBar and FlowLayout are modified from https://github.com/zhiyiYo/PyQt-Fluent-Widgets/blob/master/qfluentwidgets/components/widgets/scroll_bar.py
class ScrollBarHandle(QWidget):
""" Scroll bar handle """
def __init__(self, orient: Qt.Orientation, parent=None, fadeout: bool = False):
super().__init__(parent)
self.orient = orient
if fadeout:
self.effect = effect = QGraphicsOpacityEffect(self, opacity=1.0)
self.setGraphicsEffect(effect)
self.fadeAnimation = QPropertyAnimation(
self,
propertyName=b"opacity",
targetObject=effect,
duration=300,
startValue=1.0,
endValue=0.,
)
# self.fadeAnimation.setEasingCurve(QEasingCurve.Type.InQuint)
self.fadeAnimation.finished.connect(self.hide)
fixsize = 5
self.anime_timer = QTimer(self)
self.anime_timer.setSingleShot(True)
self.anime_timer.timeout.connect(self.start_fade_animation)
else:
fixsize = 3
if orient == Qt.Vertical:
self.setFixedWidth(fixsize)
else:
self.setFixedHeight(fixsize)
self.fadeout = fadeout
def start_fade_animation(self):
self.show()
if self.fadeAnimation.state() == QAbstractAnimation.State.Running:
self.fadeAnimation.stop()
self.fadeAnimation.start()
def prepareFadeout(self):
self.anime_timer.stop()
self.anime_timer.start(700)
if self.isHidden():
self.show()
if self.fadeAnimation.state() == QAbstractAnimation.State.Running:
self.fadeAnimation.stop()
if self.effect.opacity() != 1.:
self.effect.setOpacity(1.)
def stopFadeout(self):
if self.fadeAnimation.state() == QAbstractAnimation.State.Running:
self.fadeAnimation.stop()
self.anime_timer.stop()
self.show()
if self.effect.opacity() != 1.:
self.effect.setOpacity(1.)
def paintEvent(self, e):
painter = QPainter(self)
painter.setRenderHints(QPainter.Antialiasing)
painter.setPen(Qt.NoPen)
r = self.width() / 2 if self.orient == Qt.Vertical else self.height() / 2
c = QColor(0, 0, 0, 90)
painter.setBrush(c)
painter.drawRoundedRect(self.rect(), r, r)
class ScrollBar(QWidget):
""" Fluent scroll bar """
rangeChanged = Signal(tuple)
valueChanged = Signal(int)
sliderPressed = Signal()
sliderReleased = Signal()
sliderMoved = Signal()
def __init__(self, orient: Qt.Orientation, parent: QAbstractScrollArea, fadeout: bool = False):
super().__init__(parent)
self.groove = ScrollBarGroove(orient, self)
self.handle = ScrollBarHandle(orient, self, fadeout)
self.timer = QTimer(self)
self.scroll_area = parent
self.fadeout = fadeout
self._orientation = orient
self._singleStep = 1
self._pageStep = 50
self._padding = 0
self._minimum = 0
self._maximum = 0
self._value = 0
self._isPressed = False
self.isEnter = False
self._isExpanded = False
self._pressedPos = QPoint()
self._isForceHidden = False
if orient == Qt.Vertical:
self.partnerBar = parent.verticalScrollBar()
QAbstractScrollArea.setVerticalScrollBarPolicy(parent, Qt.ScrollBarAlwaysOff)
else:
self.partnerBar = parent.horizontalScrollBar()
QAbstractScrollArea.setHorizontalScrollBarPolicy(parent, Qt.ScrollBarAlwaysOff)
self.__initWidget(parent)
def __initWidget(self, parent):
self.groove.opacityAni.valueChanged.connect(self._onOpacityAniValueChanged)
self.partnerBar.rangeChanged.connect(self.setRange)
self.partnerBar.valueChanged.connect(self._onValueChanged)
self.valueChanged.connect(self.partnerBar.setValue)
parent.installEventFilter(self)
self.setRange(self.partnerBar.minimum(), self.partnerBar.maximum())
self.setVisible(self.maximum() > 0 and not self._isForceHidden)
self._adjustPos(self.parent().size())
def _onPageUp(self):
self.setValue(self.value() - self.pageStep())
def _onPageDown(self):
self.setValue(self.value() + self.pageStep())
def _onValueChanged(self, value):
self.val = value
if self.fadeout and not self.isEnter:
self.handle.prepareFadeout()
def value(self):
return self._value
@Property(int, notify=valueChanged)
def val(self):
return self._value
@val.setter
def val(self, value: int):
if value == self.value():
return
value = max(self.minimum(), min(value, self.maximum()))
self._value = value
self.valueChanged.emit(value)
# adjust the position of handle
self._adjustHandlePos()
def minimum(self):
return self._minimum
def maximum(self):
return self._maximum
def orientation(self):
return self._orientation
def pageStep(self):
return self._pageStep
def singleStep(self):
return self._singleStep
def isSliderDown(self):
return self._isPressed
def setValue(self, value: int):
self.val = value
def setMinimum(self, min: int):
if min == self.minimum():
return
self._minimum = min
self.rangeChanged.emit((min, self.maximum()))
def setMaximum(self, max: int):
if max == self.maximum():
return
self._maximum = max
self.rangeChanged.emit((self.minimum(), max))
def setRange(self, min: int, max: int):
if min > max or (min == self.minimum() and max == self.maximum()):
return
self.setMinimum(min)
self.setMaximum(max)
self._adjustHandleSize()
self._adjustHandlePos()
self.setVisible(max > 0 and not self._isForceHidden)
self.rangeChanged.emit((min, max))
def setPageStep(self, step: int):
if step >= 1:
self._pageStep = step
def setSingleStep(self, step: int):
if step >= 1:
self._singleStep = step
def setSliderDown(self, isDown: bool):
self._isPressed = True
if isDown:
self.sliderPressed.emit()
else:
self.sliderReleased.emit()
def expand(self):
""" expand scroll bar """
if self._isExpanded or not self.isEnter:
return
self._isExpanded = True
self.groove.fadeIn()
def collapse(self):
""" collapse scroll bar """
if not self._isExpanded or self.isEnter:
return
self._isExpanded = False
self.groove.fadeOut()
def enterEvent(self, e):
self.isEnter = True
self.timer.stop()
self.timer.singleShot(200, self.expand)
if self.fadeout:
self.handle.stopFadeout()
def leaveEvent(self, e):
self.isEnter = False
self.timer.stop()
self.timer.singleShot(200, self.collapse)
if self.fadeout:
self.handle.prepareFadeout()
def eventFilter(self, obj, e: QEvent):
if obj is not self.parent():
return super().eventFilter(obj, e)
# adjust the position of slider
if e.type() == QEvent.Resize:
self._adjustPos(e.size())
return super().eventFilter(obj, e)
def resizeEvent(self, e):
self.groove.resize(self.size())
def mousePressEvent(self, e: QMouseEvent):
super().mousePressEvent(e)
self._isPressed = True
self._pressedPos = e.pos()
if self.childAt(e.pos()) is self.handle or not self._isSlideResion(e.pos()):
return
if self.orientation() == Qt.Vertical:
if e.pos().y() > self.handle.geometry().bottom():
value = e.pos().y() - self.handle.height() - self._padding
else:
value = e.pos().y() - self._padding
else:
if e.pos().x() > self.handle.geometry().right():
value = e.pos().x() - self.handle.width() - self._padding
else:
value = e.pos().x() - self._padding
self.setValue(int(value / max(self._slideLength(), 1) * self.maximum()))
self.sliderPressed.emit()
def mouseReleaseEvent(self, e):
super().mouseReleaseEvent(e)
self._isPressed = False
self.sliderReleased.emit()
def mouseMoveEvent(self, e: QMouseEvent):
if self.orientation() == Qt.Vertical:
dv = e.pos().y() - self._pressedPos.y()
else:
dv = e.pos().x() - self._pressedPos.x()
# don't use `self.setValue()`, because it could be reimplemented
dv = int(dv / max(self._slideLength(), 1) * (self.maximum() - self.minimum()))
ScrollBar.setValue(self, self.value() + dv)
self._pressedPos = e.pos()
self.sliderMoved.emit()
def _adjustPos(self, size):
if self.orientation() == Qt.Vertical:
self.resize(12, size.height() - 2)
self.move(size.width() - 13, 1)
else:
self.resize(size.width() - 2, 12)
self.move(1, size.height() - 13)
def _adjustHandleSize(self):
p = self.parent()
if self.orientation() == Qt.Vertical:
total = self.maximum() - self.minimum() + p.height()
s = int(self._grooveLength() * p.height() / max(total, 1))
self.handle.setFixedHeight(max(30, s))
else:
total = self.maximum() - self.minimum() + p.width()
s = int(self._grooveLength() * p.width() / max(total, 1))
self.handle.setFixedWidth(max(30, s))
def _adjustHandlePos(self):
total = max(self.maximum() - self.minimum(), 1)
delta = int(self.value() / total * self._slideLength())
if self.orientation() == Qt.Vertical:
x = self.width() - self.handle.width() - 3
self.handle.move(x, self._padding + delta)
else:
y = self.height() - self.handle.height() - 3
self.handle.move(self._padding + delta, y)
def _grooveLength(self):
if self.orientation() == Qt.Vertical:
return self.height() - 2 * self._padding
return self.width() - 2 * self._padding
def _slideLength(self):
if self.orientation() == Qt.Vertical:
return self._grooveLength() - self.handle.height()
return self._grooveLength() - self.handle.width()
def _isSlideResion(self, pos: QPoint):
if self.orientation() == Qt.Vertical:
return self._padding <= pos.y() <= self.height() - self._padding
return self._padding <= pos.x() <= self.width() - self._padding
def _onOpacityAniValueChanged(self):
if not self.fadeout:
opacity = self.groove.opacityEffect.opacity()
if self.orientation() == Qt.Vertical:
self.handle.setFixedWidth(int(3 + opacity * 3))
else:
self.handle.setFixedHeight(int(3 + opacity * 3))
self._adjustHandlePos()
def setForceHidden(self, isHidden: bool):
""" whether to force the scrollbar to be hidden """
self._isForceHidden = isHidden
self.setVisible(self.maximum() > 0 and not isHidden)
def wheelEvent(self, e):
QApplication.sendEvent(self.parent().viewport(), e)
|