PyQt5鼠標跟蹤不起作用

Question

我發現一個例子，當鼠標懸停在它上面時，改變QPushButton的圖標。我試圖將其轉換爲我的代碼，但有一些問題。首先查看我發現的例子，它非常短。 http://paste.ubuntu.com/17302717/

這些代碼改變按鈕的圖標，如果鼠標在上面。這裏是我的代碼是引發錯誤

return QPushButton.mouseMoveEvent(QPushButton, event) TypeError: QPushButton.mouseMoveEvent(QMouseEvent): first argument of unbound method must have type 'QPushButton'

from PyQt5.QtWidgets import QApplication,QPushButton,QWidget 
from PyQt5.QtGui import QIcon 
from PyQt5.QtCore import QSize 

import PyQt5.QtWidgets,PyQt5.QtCore,sys 



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

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

     self.setMouseTracking(True) 

     self.setFixedSize(1400,923) 


     #Button 
     self.mbutton = QPushButton(self) 
     self.mbutton.setStyleSheet("background-color: rgb(30,30,30);" 
            "background-image: url('resources/twitter-logo.png');" 
            "border: 3px solid black;" 
            "background-position: center;" 
            ) 
     self.mbutton.setGeometry(2,300,110,60) 
     self.mbutton.clicked.connect(self.yaz) 

     self.show() 
    def mouseMoveEvent(self, event): 

     if event.pos().x()>self.mbutton.width()-10 or event.pos().y()>self.mbutton.height()-10\ 
        or event.pos().x() < 10 or event.pos().y()< 10: 
      bmp = QIcon("1.png") 
      self.mbutton.setIcon(bmp) 

     else: 
      bmp = QIcon('2.png') 
      self.mbutton.setIcon(bmp) 
     self.mbutton.setIconSize(QSize(200,200)) 
     return QPushButton.mouseMoveEvent(self, event) 

    def yaz(self): 
     print ("button pressed") 

app = QApplication(sys.argv) 
app.setStyleSheet("QMainWindow{background-color: rgb(30,30,30);border: 2px solid rgb(20,20,20)}") 

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

我不明白問題出在哪裏。我試圖將return QPushButton.mouseMoveEvent(self, event)更改爲return QPushButton.mouseMoveEvent(QPushButton, event)和其他版本，但沒有奏效。我錯過了什麼，我該如何解決這個問題？

編輯：我將self.setMouseTracking(True)更改爲self.mbutton.setMouseTracking(True)，現在沒有錯誤，但圖標無論如何不會改變。爲什麼圖標沒有改變？

Answer 1

您的代碼有幾個問題，即導入。主要的問題是，雖然你並不需要這樣的：return QPushButton.mouseMoveEvent(self, event)

請嘗試以下更正代碼：

from PyQt5.QtWidgets import QApplication,QPushButton,QWidget from 
PyQt5.QtGui import QIcon from PyQt5.QtCore import QSize from PyQt5 
import QtCore, QtWidgets, QtGui 

import PyQt5.QtWidgets,PyQt5.QtCore,sys 

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

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

     self.setMouseTracking(True) 

     self.setFixedSize(1400,923) 


     #Button 
     self.mbutton = QPushButton(self) 
     self.mbutton.setStyleSheet("background-color: rgb(30,30,30);" 
            "background-image: url('resources/twitter-logo.png');" 
            "border: 3px solid black;" 
            "background-position: center;" 
            ) 
     self.mbutton.setGeometry(2,300,110,60) 
     self.mbutton.clicked.connect(self.yaz) 

     self.show() 
    def mouseMoveEvent(self, event): 

     if event.pos().x()>self.mbutton.width()-10 or event.pos().y()>self.mbutton.height()-10\ 
        or event.pos().x() < 10 or event.pos().y()< 10: 
      bmp = QIcon("1.png") 
      self.mbutton.setIcon(bmp) 
     else: 
      print(1) 
      bmp = QIcon('2.png') 
      self.mbutton.setIcon(bmp) 
     self.mbutton.setIconSize(QSize(200,200)) 
     # return self.mbutton.mouseMoveEvent(event) 

    def yaz(self): 
     print ("button pressed") 

app = QApplication(sys.argv) 
app.setStyleSheet("QMainWindow{background-color: 
rgb(30,30,30);border: 2px solid rgb(20,20,20)}") 

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

在任何情況下，我真的不明白你想達到的目標。如果您需要爲按鈕創建某種懸停效果，還有其他更好的方法。例如，這一個：

from PyQt5.QtWidgets import QApplication,QPushButton,QWidget 
from PyQt5.QtGui import QIcon 
from PyQt5.QtCore import QSize 
from PyQt5 import QtCore, QtWidgets, QtGui 

import PyQt5.QtWidgets,PyQt5.QtCore,sys 

class HoverButton(QPushButton): 
    mouseHover = QtCore.pyqtSignal(bool) 

    def __init__(self, parent=None): 
     QPushButton.__init__(self, parent) 
     self.setMouseTracking(True) 

    def enterEvent(self, event): 
     self.mouseHover.emit(True) 
     bmp = QIcon("1.png") 
     self.setIcon(bmp) 
     self.setIconSize(QSize(200,200)) 

    def leaveEvent(self, event): 
     self.mouseHover.emit(False) 
     bmp = QIcon("2.png") 
     self.setIcon(bmp) 
     self.setIconSize(QSize(200,200)) 

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

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

     self.setMouseTracking(True) 

     self.setFixedSize(1400, 923) 


     #Button 
     self.mbutton = HoverButton(self) 
     self.mbutton.setStyleSheet("background-color: rgb(30,30,30);" 
            "background-image: url('resources/twitter-logo.png');" 
            "border: 3px solid black;" 
            "background-position: center;" 
            ) 
     self.mbutton.setGeometry(2,300,110,60) 
     self.mbutton.clicked.connect(self.yaz) 
     self.show() 

    def yaz(self): 
     print("button pressed") 

app = QApplication(sys.argv) 
app.setStyleSheet("QMainWindow{background-color: rgb(30,30,30);border: 2px solid rgb(20,20,20)}") 

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

我會建議如下回答：

PyQT how to make a QEvent.Enter on QPushbutton?（我的解決方案是基於此方法）

Pyqt Mouse hovering on a QPushButton