将特定的“`QPushButton`”分配给特定的硬件按钮

Question

我希望使用PythonandPyQt5为QPushButton分配一个特定的硬件密钥。

下面的代码使用事件筛选器来筛选每个QPushButton的鼠标按钮事件。不幸的是，点击动画并不是这个任务的一部分，只会出现在每个QPushButton上的鼠标左键点击。

是否有办法实现所期望的行为？

main.py

import sys
from PyQt5.QtCore import QEvent, QObject, Qt
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.uic import loadUi


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        loadUi("mainwindow.ui", self)

        self.pushButton_left.installEventFilter(self)
        self.pushButton_middle.installEventFilter(self)
        self.pushButton_right.installEventFilter(self)

    def eventFilter(self, obj, event):
        if event.type() == QEvent.MouseButtonPress:
            if event.button() == Qt.LeftButton and obj.objectName() == "pushButton_left":
                print("Left click")
            elif event.button() == Qt.MiddleButton and obj.objectName() == "pushButton_middle":
                print("Middle click")
            elif event.button() == Qt.RightButton and obj.objectName() == "pushButton_right":
                print("Right click")
        return QObject.event(obj, event)


def main():
    app = QApplication(sys.argv)
    main_window = MainWindow()
    main_window.show()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

mainwindow.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>1000</width>
    <height>200</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <property name="locale">
   <locale language="English" country="UnitedKingdom"/>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
     <layout class="QGridLayout" name="gridLayout">
      <item row="0" column="0">
       <widget class="QPushButton" name="pushButton_left">
        <property name="text">
         <string>For left mouse button</string>
        </property>
       </widget>
      </item>
      <item row="0" column="1">
       <spacer name="horizontalSpacer">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
      <item row="0" column="2">
       <widget class="QPushButton" name="pushButton_middle">
        <property name="text">
         <string>For middle mouse button</string>
        </property>
       </widget>
      </item>
      <item row="0" column="3">
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
      <item row="0" column="4">
       <widget class="QPushButton" name="pushButton_right">
        <property name="text">
         <string>For right mouse button</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1000</width>
     <height>28</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

Answer 1

请试试这个密码。

解释

QPushButton在默认设置下由LeftButton动画。所以我们需要考虑如何用MidButton和RightButton来制作动画。

动画的真实性与setDown(True)和setDown(False).So的组合相似或相同--当您在mousePressEvent和mouseReleaseEvent之间单击by MidButton和RightButton时，就实现了它们。

但仍有一个问题有待解决。因为QPushButton是由LeftButton动画的，所以中间按钮和右边按钮仍然由LeftButton动画。

您想要重合每个other.That的名称--也就是说，LeftButton只通过左键发出动画。( midbutton只在中间按钮上发布动画，RightButton只在右边按钮上发布动画。)

为此，有一种方法可以在eventFilter中实现返回True。这意味着eventFilter同时服务于eventFilter事件和小部件本身的事件。

因此，您不需要为pushButton实现子类并重写它。

当你点击按钮时，动画也是happens.So i调节的。

import sys
from PyQt5.QtCore import QEvent, QObject, Qt
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.uic import loadUi


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        loadUi("mainwindow.ui", self)

        self.pushButton_left.installEventFilter(self)
        self.pushButton_middle.installEventFilter(self)
        self.pushButton_right.installEventFilter(self)


    def eventFilter(self, obj, event):
        if event.type() == QEvent.MouseButtonDblClick:
            if event.button() == Qt.LeftButton and obj.objectName() == "pushButton_middle":
                return True
            elif event.button() == Qt.LeftButton and obj.objectName() == "pushButton_right":    
                return True
        if event.type() == QEvent.MouseButtonPress:
            if event.button() == Qt.LeftButton and obj.objectName() == "pushButton_left":
                print("Left click")
            elif event.button() == Qt.LeftButton and obj.objectName() == "pushButton_middle":
                obj.setDown(False)
                return True
            elif event.button() == Qt.MiddleButton and obj.objectName() == "pushButton_middle":
                obj.setDown(True)
                print("Middle click")
            elif event.button() == Qt.LeftButton and obj.objectName() == "pushButton_right":            
                obj.setDown(False)
                return True
            elif event.button() == Qt.RightButton and obj.objectName() == "pushButton_right":
                obj.setDown(True)
                print("Right click")
        elif event.type() == QEvent.MouseButtonRelease:
            if event.button() == Qt.LeftButton and obj.objectName() == "pushButton_left":
                print("Left click")
            elif event.button() == Qt.LeftButton and obj.objectName() == "pushButton_middle":

                return True
            elif event.button() == Qt.MiddleButton and obj.objectName() == "pushButton_middle":
                obj.setDown(False)
                print("Middle click")
            elif event.button() == Qt.LeftButton and obj.objectName() == "pushButton_right":            

                return True
            elif event.button() == Qt.RightButton and obj.objectName() == "pushButton_right":
                obj.setDown(False)
                print("Right click")
        return QObject.event(obj, event)


def main():
    app = QApplication(sys.argv)
    main_window = MainWindow()

    main_window.show()

    sys.exit(app.exec_())


if __name__ == "__main__":
    main()