PyQt5对话框学习
QInputDialog
用户输入使用QInputDialog输入字符，使用QLineEdit显示
import sys
from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit,
QInputDialog, QApplication)
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.btn = QPushButton('Dialog', self)
self.btn.move(20, 20)
self.btn.clicked.connect(self.showDialog)
self.le = QLineEdit(self)
self.le.move(130, 22)
self.setGeometry(300, 300, 290, 150)
self.setWindowTitle('Input dialog')
self.show()
def showDialog(self):
text, ok = QInputDialog.getText(self, 'Input Dialog',
'Enter your name:')
if ok:
self.le.setText(str(text))
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
QColorDialog
QColorDialog显示一个用于选择颜色值的对话框。
import sys
from PyQt5.QtWidgets import (QWidget, QPushButton, QFrame,
QColorDialog, QApplication)
from PyQt5.QtGui import QColor
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
col = QColor(0, 0, 0)
self.btn = QPushButton('Dialog', self)
self.btn.move(20, 20)
self.btn.clicked.connect(self.showDialog)
self.frm = QFrame(self)
self.frm.setStyleSheet("QWidget { background-color: %s }"
% col.name())
self.frm.setGeometry(130, 22, 100, 100)
self.setGeometry(300, 300, 250, 180)
self.setWindowTitle('Color dialog')
self.show()
def showDialog(self):
col = QColorDialog.getColor()
if col.isValid():
self.frm.setStyleSheet("QWidget { background-color: %s }"
% col.name())
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
QFontDialog
QFontDialog对话框用以选择字体
import sys
from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QPushButton,
QSizePolicy, QLabel, QFontDialog, QApplication)
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
vbox = QVBoxLayout()
btn = QPushButton('Dialog', self)
#布置在左上角
btn.setSizePolicy(QSizePolicy.Fixed,
QSizePolicy.Fixed)
btn.move(20, 20)
vbox.addWidget(btn)
btn.clicked.connect(self.showDialog)
self.lbl = QLabel('Knowledge only matters', self)
self.lbl.move(130, 20)
vbox.addWidget(self.lbl)
self.setLayout(vbox)
self.setGeometry(300, 300, 250, 180)
self.setWindowTitle('Font dialog')
self.show()
def showDialog(self):
font, ok = QFontDialog.getFont()
if ok:
self.lbl.setFont(font)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
QFileDialog
QFileDialog是一个让用户选择文件和目录的对话框
import sys
from PyQt5.QtWidgets import (QMainWindow, QTextEdit,
QAction, QFileDialog, QApplication)
from PyQt5.QtGui import QIcon
class Example(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.textEdit = QTextEdit()
self.setCentralWidget(self.textEdit)
self.statusBar()
openFile = QAction(QIcon('open.png'), 'Open', self)
openFile.setShortcut('Ctrl+O')
openFile.setStatusTip('Open new File')
openFile.triggered.connect(self.showDialog)
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(openFile)
self.setGeometry(300, 300, 350, 300)
self.setWindowTitle('File dialog')
self.show()
def showDialog(self):
fname = QFileDialog.getOpenFileName(self, 'Open file', '/home')
if fname[0]:
f = open(fname[0], 'r')
with f:
data = f.read()
self.textEdit.setText(data)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
