PyQt 是不是有类似的 Toastr？
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【中文标题】PyQt 是不是有类似的 Toastr？【英文标题】：Is there an equivalent of Toastr for PyQt?PyQt 是否有类似的 Toastr？ 【发布时间】：2021-10-22 12:45:53 【问题描述】：我正在处理我的第一个 PyQt 项目，我想想出一种方法来在用户完成任务时向他们提供成功或错误消息。过去使用 javascript，我使用 Toastr，我很好奇 Python 应用程序是否有类似的东西。我考虑在 PyQt 中使用 QDialog 类，但如果可能的话，我宁愿不使用单独的窗口作为弹出窗口，因为即使是无模式的对话框窗口也会分散用户的注意力。
【问题讨论】：
通知需要在窗口外还是可以“嵌入”在里面？ @musicamante 如果可能的话，我希望它与窗口分开 【参考方案1】：更新：我更新了代码，可以显示桌面通知（见下文）。
实现类似小部件的桌面感知烤面包机并非不可能，但会出现一些与平台相关的问题。另一方面，客户端更容易。
我创建了一个小类，它能够基于当前小部件的***窗口显示通知，并可以设置消息文本、图标以及通知是否可由用户关闭。我还添加了一个不错的不透明动画，这在此类系统中很常见。
它的主要用途是基于静态方法，类似于 QMessageBox 所做的，但也可以通过添加其他功能以类似的方式实现。
更新
我意识到制作一个桌面通知并不难（但是跨平台开发需要一些注意，我将把它留给程序员）。
以下是更新代码，它允许使用None 作为类的父级，使通知成为桌面小部件，而不是现有Qt 的子小部件。如果您正在阅读本文并且对此类功能不感兴趣，只需检查原始（并且稍微简单的）代码的编辑历史即可。
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
class QToaster(QtWidgets.QFrame):
closed = QtCore.pyqtSignal()
def __init__(self, *args, **kwargs):
super(QToaster, self).__init__(*args, **kwargs)
QtWidgets.QHBoxLayout(self)
self.setSizePolicy(QtWidgets.QSizePolicy.Maximum,
QtWidgets.QSizePolicy.Maximum)
self.setStyleSheet('''
QToaster
border: 1px solid black;
border-radius: 4px;
background: palette(window);
''')
# alternatively:
# self.setAutoFillBackground(True)
# self.setFrameShape(self.Box)
self.timer = QtCore.QTimer(singleShot=True, timeout=self.hide)
if self.parent():
self.opacityEffect = QtWidgets.QGraphicsOpacityEffect(opacity=0)
self.setGraphicsEffect(self.opacityEffect)
self.opacityAni = QtCore.QPropertyAnimation(self.opacityEffect, b'opacity')
# we have a parent, install an eventFilter so that when it's resized
# the notification will be correctly moved to the right corner
self.parent().installEventFilter(self)
else:
# there's no parent, use the window opacity property, assuming that
# the window manager supports it; if it doesn't, this won'd do
# anything (besides making the hiding a bit longer by half a second)
self.opacityAni = QtCore.QPropertyAnimation(self, b'windowOpacity')
self.opacityAni.setStartValue(0.)
self.opacityAni.setEndValue(1.)
self.opacityAni.setDuration(100)
self.opacityAni.finished.connect(self.checkClosed)
self.corner = QtCore.Qt.TopLeftCorner
self.margin = 10
def checkClosed(self):
# if we have been fading out, we're closing the notification
if self.opacityAni.direction() == self.opacityAni.Backward:
self.close()
def restore(self):
# this is a "helper function", that can be called from mouseEnterEvent
# and when the parent widget is resized. We will not close the
# notification if the mouse is in or the parent is resized
self.timer.stop()
# also, stop the animation if it's fading out...
self.opacityAni.stop()
# ...and restore the opacity
if self.parent():
self.opacityEffect.setOpacity(1)
else:
self.setWindowOpacity(1)
def hide(self):
# start hiding
self.opacityAni.setDirection(self.opacityAni.Backward)
self.opacityAni.setDuration(500)
self.opacityAni.start()
def eventFilter(self, source, event):
if source == self.parent() and event.type() == QtCore.QEvent.Resize:
self.opacityAni.stop()
parentRect = self.parent().rect()
geo = self.geometry()
if self.corner == QtCore.Qt.TopLeftCorner:
geo.moveTopLeft(
parentRect.topLeft() + QtCore.QPoint(self.margin, self.margin))
elif self.corner == QtCore.Qt.TopRightCorner:
geo.moveTopRight(
parentRect.topRight() + QtCore.QPoint(-self.margin, self.margin))
elif self.corner == QtCore.Qt.BottomRightCorner:
geo.moveBottomRight(
parentRect.bottomRight() + QtCore.QPoint(-self.margin, -self.margin))
else:
geo.moveBottomLeft(
parentRect.bottomLeft() + QtCore.QPoint(self.margin, -self.margin))
self.setGeometry(geo)
self.restore()
self.timer.start()
return super(QToaster, self).eventFilter(source, event)
def enterEvent(self, event):
self.restore()
def leaveEvent(self, event):
self.timer.start()
def closeEvent(self, event):
# we don't need the notification anymore, delete it!
self.deleteLater()
def resizeEvent(self, event):
super(QToaster, self).resizeEvent(event)
# if you don't set a stylesheet, you don't need any of the following!
if not self.parent():
# there's no parent, so we need to update the mask
path = QtGui.QPainterPath()
path.addRoundedRect(QtCore.QRectF(self.rect()).translated(-.5, -.5), 4, 4)
self.setMask(QtGui.QRegion(path.toFillPolygon(QtGui.QTransform()).toPolygon()))
else:
self.clearMask()
@staticmethod
def showMessage(parent, message,
icon=QtWidgets.QStyle.SP_MessageBoxInformation,
corner=QtCore.Qt.TopLeftCorner, margin=10, closable=True,
timeout=5000, desktop=False, parentWindow=True):
if parent and parentWindow:
parent = parent.window()
if not parent or desktop:
self = QToaster(None)
self.setWindowFlags(self.windowFlags() | QtCore.Qt.FramelessWindowHint |
QtCore.Qt.BypassWindowManagerHint)
# This is a dirty hack!
# parentless objects are garbage collected, so the widget will be
# deleted as soon as the function that calls it returns, but if an
# object is referenced to *any* other object it will not, at least
# for PyQt (I didn't test it to a deeper level)
self.__self = self
currentScreen = QtWidgets.QApplication.primaryScreen()
if parent and parent.window().geometry().size().isValid():
# the notification is to be shown on the desktop, but there is a
# parent that is (theoretically) visible and mapped, we'll try to
# use its geometry as a reference to guess which desktop shows
# most of its area; if the parent is not a top level window, use
# that as a reference
reference = parent.window().geometry()
else:
# the parent has not been mapped yet, let's use the cursor as a
# reference for the screen
reference = QtCore.QRect(
QtGui.QCursor.pos() - QtCore.QPoint(1, 1),
QtCore.QSize(3, 3))
maxArea = 0
for screen in QtWidgets.QApplication.screens():
intersected = screen.geometry().intersected(reference)
area = intersected.width() * intersected.height()
if area > maxArea:
maxArea = area
currentScreen = screen
parentRect = currentScreen.availableGeometry()
else:
self = QToaster(parent)
parentRect = parent.rect()
self.timer.setInterval(timeout)
# use Qt standard icon pixmaps; see:
# https://doc.qt.io/qt-5/qstyle.html#StandardPixmap-enum
if isinstance(icon, QtWidgets.QStyle.StandardPixmap):
labelIcon = QtWidgets.QLabel()
self.layout().addWidget(labelIcon)
icon = self.style().standardIcon(icon)
size = self.style().pixelMetric(QtWidgets.QStyle.PM_SmallIconSize)
labelIcon.setPixmap(icon.pixmap(size))
self.label = QtWidgets.QLabel(message)
self.layout().addWidget(self.label)
if closable:
self.closeButton = QtWidgets.QToolButton()
self.layout().addWidget(self.closeButton)
closeIcon = self.style().standardIcon(
QtWidgets.QStyle.SP_TitleBarCloseButton)
self.closeButton.setIcon(closeIcon)
self.closeButton.setAutoRaise(True)
self.closeButton.clicked.connect(self.close)
self.timer.start()
# raise the widget and adjust its size to the minimum
self.raise_()
self.adjustSize()
self.corner = corner
self.margin = margin
geo = self.geometry()
# now the widget should have the correct size hints, let's move it to the
# right place
if corner == QtCore.Qt.TopLeftCorner:
geo.moveTopLeft(
parentRect.topLeft() + QtCore.QPoint(margin, margin))
elif corner == QtCore.Qt.TopRightCorner:
geo.moveTopRight(
parentRect.topRight() + QtCore.QPoint(-margin, margin))
elif corner == QtCore.Qt.BottomRightCorner:
geo.moveBottomRight(
parentRect.bottomRight() + QtCore.QPoint(-margin, -margin))
else:
geo.moveBottomLeft(
parentRect.bottomLeft() + QtCore.QPoint(margin, -margin))
self.setGeometry(geo)
self.show()
self.opacityAni.start()
class W(QtWidgets.QWidget):
def __init__(self):
QtWidgets.QWidget.__init__(self)
layout = QtWidgets.QVBoxLayout(self)
toasterLayout = QtWidgets.QHBoxLayout()
layout.addLayout(toasterLayout)
self.textEdit = QtWidgets.QLineEdit('Ciao!')
toasterLayout.addWidget(self.textEdit)
self.cornerCombo = QtWidgets.QComboBox()
toasterLayout.addWidget(self.cornerCombo)
for pos in ('TopLeft', 'TopRight', 'BottomRight', 'BottomLeft'):
corner = getattr(QtCore.Qt, 'Corner'.format(pos))
self.cornerCombo.addItem(pos, corner)
self.windowBtn = QtWidgets.QPushButton('Show window toaster')
toasterLayout.addWidget(self.windowBtn)
self.windowBtn.clicked.connect(self.showToaster)
self.screenBtn = QtWidgets.QPushButton('Show desktop toaster')
toasterLayout.addWidget(self.screenBtn)
self.screenBtn.clicked.connect(self.showToaster)
# a random widget for the window
layout.addWidget(QtWidgets.QTableView())
def showToaster(self):
if self.sender() == self.windowBtn:
parent = self
desktop = False
else:
parent = None
desktop = True
corner = QtCore.Qt.Corner(self.cornerCombo.currentData())
QToaster.showMessage(
parent, self.textEdit.text(), corner=corner, desktop=desktop)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = W()
w.show()
sys.exit(app.exec_())
【讨论】：
这就是我的想法。不透明动画效果不错！ @NickS 我已经更新了答案，增加了对桌面通知的支持。我只在我的 Linux 环境下对其进行了测试，因此它可能在 Windows 或 MacOS 下可能无法按预期运行。如果您遇到任何意外行为，请告诉我。 我已经按预期运行了，感谢您的帮助！ 我运行了这段代码，它惊人的惊人；但是，由于某种原因，桌面通知无法在 Win 10 上运行 @ThePyGuy 不幸的是我没有 Windows 10 机器，所以我帮不了你很多。 “不工作”是指桌面通知，对吗？您在输出中收到任何错误消息吗？【参考方案2】：试试看：
import sys
from PyQt5.QtCore import (QRectF, Qt, QPropertyAnimation, pyqtProperty,
QPoint, QParallelAnimationGroup, QEasingCurve)
from PyQt5.QtGui import QPainter, QPainterPath, QColor, QPen
from PyQt5.QtWidgets import (QLabel, QWidget, QVBoxLayout, QApplication,
QLineEdit, QPushButton)
class BubbleLabel(QWidget):
BackgroundColor = QColor(195, 195, 195)
BorderColor = QColor(150, 150, 150)
def __init__(self, *args, **kwargs):
text = kwargs.pop("text", "")
super(BubbleLabel, self).__init__(*args, **kwargs)
self.setWindowFlags(
Qt.Window | Qt.Tool | Qt.FramelessWindowHint |
Qt.WindowStaysOnTopHint | Qt.X11BypassWindowManagerHint)
# Set minimum width and height
self.setMinimumWidth(200)
self.setMinimumHeight(58)
self.setAttribute(Qt.WA_TranslucentBackground, True)
layout = QVBoxLayout(self)
# Top left and bottom right margins (16 below because triangles are included)
layout.setContentsMargins(8, 8, 8, 16)
self.label = QLabel(self)
layout.addWidget(self.label)
self.setText(text)
# Get screen height and width
self._desktop = QApplication.instance().desktop()
def setText(self, text):
self.label.setText(text)
def text(self):
return self.label.text()
def stop(self):
self.hide()
self.animationGroup.stop()
self.close()
def show(self):
super(BubbleLabel, self).show()
# Window start position
startPos = QPoint(
self._desktop.screenGeometry().width() - self.width() - 100,
self._desktop.availableGeometry().height() - self.height())
endPos = QPoint(
self._desktop.screenGeometry().width() - self.width() - 100,
self._desktop.availableGeometry().height() - self.height() * 3 - 5)
self.move(startPos)
# Initialization animation
self.initAnimation(startPos, endPos)
def initAnimation(self, startPos, endPos):
# Transparency animation
opacityAnimation = QPropertyAnimation(self, b"opacity")
opacityAnimation.setStartValue(1.0)
opacityAnimation.setEndValue(0.0)
# Set the animation curve
opacityAnimation.setEasingCurve(QEasingCurve.InQuad)
opacityAnimation.setDuration(4000)
# Moving up animation
moveAnimation = QPropertyAnimation(self, b"pos")
moveAnimation.setStartValue(startPos)
moveAnimation.setEndValue(endPos)
moveAnimation.setEasingCurve(QEasingCurve.InQuad)
moveAnimation.setDuration(5000)
# Parallel animation group (the purpose is to make the two animations above simultaneously)
self.animationGroup = QParallelAnimationGroup(self)
self.animationGroup.addAnimation(opacityAnimation)
self.animationGroup.addAnimation(moveAnimation)
# Close window at the end of the animation
self.animationGroup.finished.connect(self.close)
self.animationGroup.start()
def paintEvent(self, event):
super(BubbleLabel, self).paintEvent(event)
painter = QPainter(self)
painter.setRenderHint(QPainter.Antialiasing) # Antialiasing
rectPath = QPainterPath() # Rounded Rectangle
triPath = QPainterPath() # Bottom triangle
height = self.height() - 8 # Offset up 8
rectPath.addRoundedRect(QRectF(0, 0, self.width(), height), 5, 5)
x = self.width() / 5 * 4
triPath.moveTo(x, height) # Move to the bottom horizontal line 4/5
# Draw triangle
triPath.lineTo(x + 6, height + 8)
triPath.lineTo(x + 12, height)
rectPath.addPath(triPath) # Add a triangle to the previous rectangle
# Border brush
painter.setPen(QPen(self.BorderColor, 1, Qt.SolidLine,
Qt.RoundCap, Qt.RoundJoin))
# Background brush
painter.setBrush(self.BackgroundColor)
# Draw shape
painter.drawPath(rectPath)
# Draw a line on the bottom of the triangle to ensure the same color as the background
painter.setPen(QPen(self.BackgroundColor, 1,
Qt.SolidLine, Qt.RoundCap, Qt.RoundJoin))
painter.drawLine(x, height, x + 12, height)
def windowOpacity(self):
return super(BubbleLabel, self).windowOpacity()
def setWindowOpacity(self, opacity):
super(BubbleLabel, self).setWindowOpacity(opacity)
# Since the opacity property is not in QWidget, you need to redefine one
opacity = pyqtProperty(float, windowOpacity, setWindowOpacity)
class TestWidget(QWidget):
def __init__(self, *args, **kwargs):
super(TestWidget, self).__init__(*args, **kwargs)
layout = QVBoxLayout(self)
self.msgEdit = QLineEdit(self, returnPressed=self.onMsgShow)
self.msgButton = QPushButton("Display content", self, clicked=self.onMsgShow)
layout.addWidget(self.msgEdit)
layout.addWidget(self.msgButton)
def onMsgShow(self):
msg = self.msgEdit.text().strip()
if not msg:
return
if hasattr(self, "_blabel"):
self._blabel.stop()
self._blabel.deleteLater()
del self._blabel
self._blabel = BubbleLabel()
self._blabel.setText(msg)
self._blabel.show()
if __name__ == "__main__":
app = QApplication(sys.argv)
w = TestWidget()
w.show()
sys.exit(app.exec_())
【讨论】：
哇！这很好地实现了。 干得好！真的很有帮助，设计得很好 这段代码有一些不推荐使用的功能，我已经编辑并作为要点上传了gist.github.com/Tuhin-thinks/d94c613ba0f75df0c8104c067970fc92以上是关于PyQt 是不是有类似的 Toastr？的主要内容，如果未能解决你的问题，请参考以下文章
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