Python GUI學習筆記(二):使用PyQt5

安裝

pip install PyQt5pip install PyQt5-tools

找到QtDesigner

將exe程式傳送到桌面建立捷徑

載入.UI檔

from PyQt5 import QtWidgets, uic

import sys

app = QtWidgets.QApplication([])

win = uic.loadUi("mydesign.ui") #specify the location of your .ui file

win.show()

sys.exit(app.exec())

將.ui轉成.py檔案

pyuic5 mydesign.ui -o mydesign.py #轉成mydesign.py

建立視窗

from PyQt5 import QtWidgets

from mydesign import Ui_MainWindow # importing our generated file

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())

改變字體

from PyQt5 import QtWidgets, QtGui

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.label.setFont(QtGui.QFont('SansSerif', 30)) # change font type and size


app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())

改變視窗尺寸

from PyQt5 import QtWidgets, QtGui,QtCore

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.label.setFont(QtGui.QFont('SansSerif', 30))

self.ui.label.setGeometry(QtCore.QRect(10, 10, 200, 200)) # change label geometry


app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())

改變文字

from PyQt5 import QtWidgets, QtGui,QtCore

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.label.setFont(QtGui.QFont('SansSerif', 30))

self.ui.label.setGeometry(QtCore.QRect(10, 10, 200, 200))

self.ui.label.setText("ABC123") #change label text


app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())

建立QLineEdit

from PyQt5 import QtWidgets,QtCore

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.lineEdit.setText("Welcome to LikeGeeks website") #change text

self.ui.lineEdit_2.setMaxLength(10) #set maximum length

self.ui.lineEdit_3.setEchoMode(QtWidgets.QLineEdit.Password) # password input

self.ui.lineEdit_4.setReadOnly(True) #QLineEdit readonly

self.ui.lineEdit_5.setStyleSheet("color: rgb(28, 43, 255);") #change text color

self.ui.lineEdit_6.setStyleSheet("background-color: rgb(28, 43, 255);") #change QLineEdit background color



app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())

建立按鈕

from PyQt5 import QtWidgets

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.pushButton.clicked.connect(self.btnClicked) # connecting the clicked signal with btnClicked slot

def btnClicked(self):

self.ui.label.setText("Button Clicked")



app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())

使用事件

def crackit():

print(“hazelnut cracked!”)

hazelnut = nut()

hazelnut.cracked.connect(crackit) # connecting the cracked signal with crackit slot

hazelnut.crack()

QComboBox widget

from PyQt5 import QtWidgets

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.comboBox.addItem("First item") #add item

self.ui.comboBox.addItem("Second item")


app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())
#Get all items
self.ui.comboBox.setCurrentIndex(1) #select by index which is zero-based

self.ui.comboBox.setCurrentText("Second item") #select by text

QTableWidget

from PyQt5 import QtWidgets

from mydesign import Ui_MainWindow

import sys

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super(mywindow, self).__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.tableWidget.setColumnCount(2)

self.ui.tableWidget.setRowCount(4)


app = QtWidgets.QApplication([])

application = mywindow()

application.show()

sys.exit(app.exec())
#Clear QtableWidget content
def clear():

self.ui.tableWidget.clear()

self.ui.pushButton.clicked.connect(clear)

Populate QTableWidget by code

from PyQt5.QtWidgets import QTableWidgetItem

from mydesign import *

import sys

data = []

data.append(('Populating', 'QtableWidget'))

data.append(('With data', 'In Python'))

data.append(('Is easy', 'Job'))


class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super().__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.tableWidget.setRowCount(3)

self.ui.tableWidget.setColumnCount(2)

row=0

for tup in data:

col=0

for item in tup:

cellinfo=QTableWidgetItem(item)

self.ui.tableWidget.setItem(row, col, cellinfo)

col+=1

row += 1


app = QtWidgets.QApplication([])

win = mywindow()

win.show()

sys.exit(app.exec())

讓QTableWidget唯讀

from PyQt5.QtWidgets import QTableWidgetItem

from mydesign import *

import sys

data = []

data.append(('Populating', 'QtableWidget'))

data.append(('With data', 'In Python'))

data.append(('Is easy', 'Job'))


class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super().__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.tableWidget.setRowCount(3)

self.ui.tableWidget.setColumnCount(2)

row=0

for tup in data:

col=0

for item in tup:

cellinfo=QTableWidgetItem(item)

cellinfo.setFlags(QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled) # make cell not editable

self.ui.tableWidget.setItem(row, col, cellinfo)

col+=1

row += 1


app = QtWidgets.QApplication([])

win = mywindow()

win.show()

sys.exit(app.exec())

設定QTableWidget的column名稱

from PyQt5.QtWidgets import QTableWidgetItem

from mydesign import *

import sys

data = []

data.append(('Populating', 'QtableWidget'))

data.append(('With data', 'In Python'))

data.append(('Is easy', 'Job'))


class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super().__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.tableWidget.setRowCount(3)

self.ui.tableWidget.setColumnCount(2)

self.ui.tableWidget.setHorizontalHeaderLabels(('Column 1', 'Column 2')) # set header text

row=0

for tup in data:

col=0

for item in tup:

cellinfo=QTableWidgetItem(item)

self.ui.tableWidget.setItem(row, col, cellinfo)

col+=1

row += 1


app = QtWidgets.QApplication([])

win = mywindow()

win.show()

sys.exit(app.exec())

在QTableWidget新增QComboBox

from PyQt5.QtWidgets import QTableWidgetItem

from mydesign import *

import sys

data = ['PyQt5','Is','Awesome']

class mywindow(QtWidgets.QMainWindow):

def __init__(self):

super().__init__()

self.ui = Ui_MainWindow()

self.ui.setupUi(self)

self.ui.tableWidget.setRowCount(3)

self.ui.tableWidget.setColumnCount(2)

row=0

for item in data:

cellinfo=QTableWidgetItem(item)

combo = QtWidgets.QComboBox()

combo.addItem("First item")

combo.addItem("Second item")

self.ui.tableWidget.setItem(row, 0, cellinfo)

self.ui.tableWidget.setCellWidget(row, 1, combo)

row += 1


app = QtWidgets.QApplication([])

win = mywindow()

win.show()

sys.exit(app.exec())

打包程式成.exe

pip install pyinstallerpyinstaller --onefile test.py       #形成一個.exe
pyinstaller -w test.py #隱藏跳出的CMD界面
pyinstaller --onefile -w test.py #合併上述功能

Written by

Machine Learning / Deep Learning / Python / Flutter cakeresume.com/yanwei-liu

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