Pyqt5鼠标事件不适用于我的自定义选项卡栏

Question

所以我在用pyqt5制作自定义标签栏时遇到了问题。我已经看到了一些示例，但是在实施这些示例时，它们似乎对我不起作用。到目前为止，这是我的代码（由于不需要，我只剪了一些注释文本）：

from PyQt5 import QtWidgets, uic,QtCore
from PyQt5.QtCore import Qt,QObject,QThread,pyqtSignal,QCoreApplication,QPoint
import PyQt5.QtCore
from PyQt5.QtWidgets import QApplication,QPushButton,QVBoxLayout,QWidget,QFormLayout,QGridLayout,QLabel,QDialog,QHBoxLayout,QDesktopWidget

class LoginWindow(QWidget):
    def __init__(self):
        self.App = QtWidgets.QApplication([])
        self.LoadedApp = uic.loadUi("LoginWindow2.ui")

        self.LoadedApp.setWindowFlags(Qt.FramelessWindowHint)

        self.pressing = False
        self.start = QPoint(0, 0)
        self.center()
        self.oldPos = self.LoadedApp.pos()
        self.LoadedApp.show()
        self.App.exec()

    def mouseReleaseEvent(self, QMouseEvent):
        self.pressing = False

    def mousePressEvent(self, event):
        self.oldPos = event.globalPos()

    def mouseMoveEvent(self, event):
        print("1")
        delta = QPoint (event.globalPos() - self.oldPos)
        #print(delta)
        self.move(self.x() + delta.x(), self.y() + delta.y())
        self.oldPos = event.globalPos()

    def center(self):
        qr = self.LoadedApp.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.LoadedApp.move(qr.topLeft())

LoginWindow = LoginWindow()

这里的问题是鼠标移动事件似乎没有连接到pyqt5鼠标事件。我已经读到，当类中的函数具有特定的函数名称或类似名称时，应该连接它？这很令人困惑，我的登录窗口似乎没有变化。鼠标事件非常令人困惑，我尝试了其他两种方法，但是由于对我没有意义，我最终删除了实现。

这里是UI的下载链接：https://cdn.discordapp.com/attachments/516367579598684184/634439342940487680/LoginWindow2.ui

这是用户界面的外观（左侧层次结构集中在QLabel小部件上）：https://cdn.discordapp.com/attachments/516367579598684184/634439663557541918/unknown.png

我正在尝试使顶部栏成为可拖动的，而不是整个窗口仅是顶部栏。有什么帮助吗？如果您需要其他信息，或者对我要做什么有疑问，请问我，我会给他们答复。

Answer 1

... to get the top bar to be drag-able, not the whole window ... ?抱歉，但是我不明白您要拖放的内容。试试吧：

from PyQt5 import QtWidgets, QtCore, uic
from PyQt5.QtCore import Qt, QObject, QThread, pyqtSignal, QCoreApplication, QPoint
from PyQt5.QtWidgets import (QApplication, QPushButton, QVBoxLayout, QWidget,
                             QFormLayout, QGridLayout, QLabel, QDialog, QHBoxLayout,
                             QDesktopWidget, QMainWindow)

class LoginWindow(QMainWindow):                                 # - (QWidget):
    def __init__(self):
        super(LoginWindow, self).__init__()                     # +
#        self.App = QtWidgets.QApplication([])
#        self.LoadedApp = uic.loadUi("LoginWindow2.ui")
        uic.loadUi("LoginWindow2.ui", self)

#        self.LoadedApp.setWindowFlags(Qt.FramelessWindowHint)
        self.setWindowFlags(Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint)

        self.pressing = False
        self.start = QPoint(0, 0)
        self.center()
#        self.oldPos = self.LoadedApp.pos()
        self.oldPos = self.pos()              
#        self.LoadedApp.show()
#        self.App.exec()

    def mouseReleaseEvent(self, QMouseEvent):
        self.pressing = False

    def mousePressEvent(self, event):
        self.oldPos = event.globalPos()

    def mouseMoveEvent(self, event):
        delta = QPoint (event.globalPos() - self.oldPos)
        self.move(self.x() + delta.x(), self.y() + delta.y())
        self.oldPos = event.globalPos()

    def center(self):
#        qr = self.LoadedApp.frameGeometry()
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
#        self.LoadedApp.move(qr.topLeft())
        self.move(qr.topLeft())


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = LoginWindow()
    w.show()
    sys.exit(app.exec_())

---

更新

我仍然想这样做，以便当您单击鼠标左键并位于窗口最上方的QLabel区域中时，可以在整个屏幕上拖动窗口，因此应将其用作选项卡。 x按钮所在的区域。我该怎么做呢？

from PyQt5 import QtWidgets, QtCore, uic
from PyQt5.QtCore import Qt, QObject, QThread, pyqtSignal, QCoreApplication, QPoint
from PyQt5.QtWidgets import (QApplication, QPushButton, QVBoxLayout, QWidget,
                             QFormLayout, QGridLayout, QLabel, QDialog, QHBoxLayout,
                             QDesktopWidget, QMainWindow)

class LoginWindow(QMainWindow):                                 
    def __init__(self):
        super(LoginWindow, self).__init__()                     
        uic.loadUi("LoginWindow2.ui", self)
        self.setWindowFlags(Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint)
        self.pressing = False
        self.start = QPoint(0, 0)
        self.center()
        self.oldPos = self.pos()              

    def mouseReleaseEvent(self, QMouseEvent):
        self.pressing = False

    def mousePressEvent(self, event):
        self.oldPos = event.globalPos()

    def mouseMoveEvent(self, event):

        if event.pos().y() > 20:                                    # <---
            return                                                  # <---

        delta = QPoint (event.globalPos() - self.oldPos)
        self.move(self.x() + delta.x(), self.y() + delta.y())
        self.oldPos = event.globalPos()

    def center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = LoginWindow()
    w.show()
    sys.exit(app.exec_())