PyQt5可拖动无框窗口

Question

我找到了一个在无框窗口上设置边框的例子，但它不可拖动。我怎样才能使无框窗口可拖动？特别是如果我能看到一个例子，它会很棒。这是我的示例代码（通常代码更长，这就是为什么有许多库只是不介意它们）;

from PyQt5.QtWidgets import (QMessageBox,QApplication, QWidget, QToolTip, QPushButton, 
          QDesktopWidget, QMainWindow, QAction, qApp, QToolBar, QVBoxLayout, 
          QComboBox,QLabel,QLineEdit,QGridLayout,QMenuBar,QMenu,QStatusBar, 
          QTextEdit,QDialog,QFrame,QProgressBar 
          ) 
from PyQt5 import QtCore, QtWidgets, QtGui 
from PyQt5.QtGui import QIcon,QFont,QPixmap,QPalette 
from PyQt5.QtCore import QCoreApplication, Qt,QBasicTimer 

import sys 

class cssden(QMainWindow): 
    def __init__(self): 
     super().__init__() 


     self.mwidget = QMainWindow(self) 
     self.setWindowFlags(QtCore.Qt.FramelessWindowHint) 


     #size 
     self.setFixedSize(320, 450) 
     self.center 


     #label 
     self.lbl = QLabel(self) 
     self.lbl.setText("test") 
     self.lbl.setStyleSheet("background-color: rgb(0,0,0);" 
           "border: 1px solid red;" 
           "color: rgb(255,255,255);" 
           "font: bold italic 20pt 'Times New Roman';") 
     self.lbl.setGeometry(5,5,60,40) 

     self.show() 

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

app = QApplication(sys.argv) 
app.setStyleSheet("QMainWindow{background-color: darkgray;border: 1px solid black}") 

ex = cssden() 
sys.exit(app.exec_()) 

Answer 1

您需要自己处理鼠标事件。

• 我们需要在mousePressEvent添加事件，这将让我们最后的窗口中点击
• 然后的地方，我们将添加一个mouseMoveEvent，这将计算最后单击点之间的距离，当前的鼠标位置。我们将根据这个距离移动窗口。

这是固定的代码：

from PyQt5.QtWidgets import (QMessageBox,QApplication, QWidget, QToolTip, QPushButton, 
          QDesktopWidget, QMainWindow, QAction, qApp, QToolBar, QVBoxLayout, 
          QComboBox,QLabel,QLineEdit,QGridLayout,QMenuBar,QMenu,QStatusBar, 
          QTextEdit,QDialog,QFrame,QProgressBar 
          ) 
from PyQt5 import QtCore, QtWidgets, QtGui 
from PyQt5.QtGui import QIcon,QFont,QPixmap,QPalette 
from PyQt5.QtCore import QCoreApplication, Qt,QBasicTimer, QPoint 

import sys 

class cssden(QMainWindow): 
    def __init__(self): 
     super().__init__() 


     self.mwidget = QMainWindow(self) 
     self.setWindowFlags(QtCore.Qt.FramelessWindowHint) 


     #size 
     self.setFixedSize(320, 450) 
     self.center() 


     #label 
     self.lbl = QLabel(self) 
     self.lbl.setText("test") 
     self.lbl.setStyleSheet("background-color: rgb(0,0,0);" 
           "border: 1px solid red;" 
           "color: rgb(255,255,255);" 
           "font: bold italic 20pt 'Times New Roman';") 
     self.lbl.setGeometry(5,5,60,40) 

     self.oldPos = self.pos() 

     self.show() 

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

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

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

app = QApplication(sys.argv) 
app.setStyleSheet("QMainWindow{background-color: darkgray;border: 1px solid black}") 

ex = cssden() 
sys.exit(app.exec_())