pyqt按键检测

Posted 2020-12-29 wudeng

# _*_ coding: utf-8 _*_
__author__ = ‘pythonwu‘
__date__ = "2018/8/9 10:47"
# textboxValue = self.textbox.text()
import sys
from PyQt5.QtWidgets import QApplication,QWidget
from PyQt5 import QtCore,QtGui
from PyQt5.QtCore import *
from PyQt5.Qt import QLineEdit,QTextEdit


class EmittingStream(QtCore.QObject):
        textWritten = QtCore.pyqtSignal(str)  #定义一个发送str的信号
        def write(self, text):
            self.textWritten.emit(str(text))

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 300, 200)
        self.setFixedWidth(300)
        self.setFixedHeight(200)
        self.setWindowTitle(‘按键检测‘)
        # self.textbox = QLineEdit(self)
        # self.textbox.move(20,20)
        # self.textbox.resize(260,100)
        self.centralwidget = QWidget(self)
        self.centralwidget.setObjectName("centralwidget")
        self.textEdit = QTextEdit(self)
        self.textEdit.setGeometry(QtCore.QRect(0, 0, 731, 301))
        self.textEdit.setObjectName("textEdit")
        self.textEdit.setReadOnly(True)

        sys.stdout = EmittingStream(textWritten=self.outputWritten)
        sys.stderr = EmittingStream(textWritten=self.outputWritten)
        self.show()

    def outputWritten(self, text):
        cursor = self.textEdit.textCursor()
        cursor.movePosition(QtGui.QTextCursor.End)
        cursor.insertText(text)
        self.textEdit.setTextCursor(cursor)
        self.textEdit.ensureCursorVisible()

    # 检测键盘回车按键
    def keyPressEvent(self, event):
        print("按下：" + str(event.key()))
        # 举例
        if(event.key() == Qt.Key_Escape):
            print(‘测试：ESC‘)
        if(event.key() == Qt.Key_A):
            print(‘测试：A‘)
        if(event.key() == Qt.Key_1):
            print(‘测试：1‘)
        if(event.key() == Qt.Key_Enter):
            print(‘测试：Enter‘)
        if(event.key() == Qt.Key_Space):
            print(‘测试：Space‘)
        if(event.key() == Qt.Key_Control):
            print(‘测试：Ctrl‘)
        if(event.key() == Qt.Key_Delete):
            print(‘测试: Delete‘)
        if(event.key() == Qt.Key_Alt):
            print(‘测试： Alt‘)

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            print("鼠标左键点击")
        elif event.button() == Qt.RightButton:
            print("鼠标右键点击")
        elif event.button() == Qt.MidButton:
            print("鼠标中键点击")
if __name__ == ‘__main__‘:
    app = QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec_())

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