基于PyQT实现区分左键双击和单击

在PyQt中没有直接提供左键双击的判断方法，需要自己实现，其思路主要如下所示：

1、起动一个定时器，判断在指定的时间之内，点击次数超过2次，则视为双击（其主要思路判断两次点击的时间差在预测的条件以内）

2、起动一个定时器，判断在指定的时间之内，点击次数超过2次，另外再获取鼠标点击的坐标，如果前后两次点击的坐标位置，属于同一个位置，满足这两个条件则判断为双击（其主要思路判断两次点击的时间差在预测的条件以内，且点击的坐标在预设的坐标之内，允许存在一定的偏差）

from PyQt5.QtCore import QTimer
from PyQt5 import QtCore, QtGui, QtWidgets

class myWidgets(QtWidgets.QTableWidget): 

  def __init__(self, parent=None):
    super(myWidgets, self).__init__(parent)
    self.isDoubleClick = False
    self.mouse = ""
  def mousePressEvent(self, e): 
    # 左键按下
    if e.buttons() == QtCore.Qt.LeftButton:
      QTimer.singleShot(0, lambda: self.judgeClick(e))
    # 右键按下
    elif e.buttons() == QtCore.Qt.RightButton:
      self.mouse = "右"
    # 中键按下
    elif e.buttons() == QtCore.Qt.MidButton:
      self.mouse = '中'
    # 左右键同时按下
    elif e.buttons() == QtCore.Qt.LeftButton | QtCore.Qt.RightButton:
      self.mouse = '左右'
    # 左中键同时按下
    elif e.buttons() == QtCore.Qt.LeftButton | QtCore.Qt.MidButton:
      self.mouse = '左中'
    # 右中键同时按下
    elif e.buttons() == QtCore.Qt.MidButton | QtCore.Qt.RightButton:
      self.mouse = '右中'
    # 左中右键同时按下
    elif e.buttons() == QtCore.Qt.LeftButton | QtCore.Qt.MidButton | QtCore.Qt.RightButton:
      self.mouse = '左中右'
  def mouseDoubleClickEvent(self,e):
    # 双击
    self.mouse = "双击"
    self.isDoubleClick=True

  def judgeClick(self,e):
    if self.isDoubleClick== False:
      self.mouse="左"
    else:
      self.isDoubleClick=False
      self.mouse = "双击"

或

from PyQt5.QtCore import QTimer
from PyQt5 import QtCore, QtGui, QtWidgets

class myWidgets(QtWidgets.QTableWidget):

  def __init__(self, parent=None):
    super(myWidgets, self).__init__(parent)
    self.mouse = ""
    self.timer=QTimer(self)
    self.timer.timeout.connect(self.singleClicked)

  def singleClicked(self):
    if self.timer.isActive():
      self.timer.stop()
      self.mouse="左"

  def mouseDoubleClickEvent(self,e):
    if self.timer.isActive() and e.buttons() ==QtCore.Qt.LeftButton:
      self.timer.stop()
      self.mouse="双击"
    super(myWidgets,self).mouseDoubleClickEvent(e)

  def mousePressEvent(self,e):
    if e.buttons()== QtCore.Qt.LeftButton:
      self.timer.start(1000)
    elif e.buttons()== QtCore.Qt.RightButton:
      self.mouse="右"
    super(myWidgets,self).mousePressEvent(e)

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