PyQT5之多窗口交互
1.PyQT5图像2.PyQT5水平垂直布局3.PyQT5之图片左右翻页4.PyQT5之QPushButton和布局5.PyQT5之label6.PyQT5之选择图片7.PyQT5之自定义信号8.PyQT5之窗口9.PyQT5之菜单栏和工具栏10.PyQT5之QComboBox11.PyQT5之Checkbox12.PyQT5之QRadioButton13.PyQT5之单行文本输入到多行显示窗14.PyQT5之网格布局多图片显示15.PyQtGraph绘制折线图16.PyQT5之PyQtGraph实时数据显示17.PyQT5之窗口最大化最小化18.PyQT5之QSS基础/子控件选择器19.PyQT5样式设置20.PyQT5绘图21.PyQT5窗口样式设置22.PyQT5之设置窗口控件风格
23.PyQT5之多窗口交互
24.PyQT5之override覆盖槽函数25.PyQT5之为槽函数传递参数26.PyQT5信号与槽的连接27.PyQT5信号刷新时间28.PyQT5之信号关闭窗口29.信号与槽N对N30.PyQT5之多个信号31.PyQT5之QTreeView32.PyQT5内嵌html33.PyQT5加载本地web页面34.PyQT5之QWebEngineView35.PyQT5之QThread36.PyQT5之QTimer37.PyQT5之QStackedWidget38.PyQT5之QTreeWidget-QTabWidget39.PyQT5之QTableWidget40.PyQT5之QListWidget41.PyQT5之QListView42.PyQT5之二维表QTableView43.PyQT5打印机44.PyQT5之QPainter45.PyQT5之QFontDialog46.PyQT5之QInputDialog47.PyQT5之QMessageBox48.PyQT5之QDialog49.PyQT5之多页面切换50.PyQT5之计数器控件QSpinBox51.PyQT5之滑块控件QSlider52.PyQtGraph绘图参考53.PyQtGraph之多图绘制54.PyQtGraph之柱状图55.PyQt5选择文件控件QFileDialog方法一:不使用信号与槽
MultiWin.py文件
"""
多窗口交互--不使用信号与槽
"""
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from DateDialog import DateDialog
class MultiWindow1(QWidget):
def __init__(self):
super(MultiWindow1, self).__init__()
self.setWindowTitle("多窗口交互(1):不使用信号和槽")
self.lineEdit = QLineEdit(self)
self.button1 = QPushButton("弹出对话框1")
self.button1.clicked.connect(self.onButton1Click)
self.button2 = QPushButton("弹出对话框2")
self.button2.clicked.connect(self.onButton2Click)
gridLayout = QGridLayout()
gridLayout.addWidget(self.lineEdit)
gridLayout.addWidget(self.button1)
gridLayout.addWidget(self.button2)
self.setLayout(gridLayout)
def onButton1Click(self):
dialog = DateDialog(self)
result = dialog.exec()
date = dialog.dateTime()
self.lineEdit.setText(date.date().toString())
dialog.destroy()
def onButton2Click(self):
date, time, result = DateDialog.getDateTime()
self.lineEdit.setText(date.toString())
if result == QDialog.Accepted:
print("点击确认按钮")
else:
print("点击取消按钮")
if __name__ == "__main__":
app = QApplication(sys.argv)
main = MultiWindow1()
main.show()
sys.exit(app.exec_())
DateDialog.py文件
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class DateDialog(QDialog):
def __init__(self, parent=None):
super(DateDialog, self).__init__(parent)
self.setWindowTitle("DateDialog")
layout = QVBoxLayout(self)
self.datetime = QDateTimeEdit(self)
self.datetime.setCalendarPopup(True)
self.datetime.setDateTime(QDateTime.currentDateTime())
layout.addWidget(self.datetime)
button = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel, Qt.Horizontal, self)
button.accepted.connect(self.accept)
button.rejected.connect(self.reject)
layout.addWidget(button)
def dateTime(self):
return self.datetime.dateTime()
@staticmethod
def getDateTime(parent=None):
dialog = DateDialog(parent)
result = dialog.exec()
date = dialog.dateTime()
return (date.date(), date.time(), result==QDialogButtonBox.Ok)
方法二:使用信号与槽
如果一个窗口A与另一个窗口B交互,A尽量不要直接访问B窗口中的控件,
应该访问B窗口中的信号,并指定与信号绑定的槽函数
例如:如果A直接访问B窗口的控件,一旦B窗口控件发生改变,那么A和B的代码都需要变化
如果A访问的是B中的信号,那么B中的控件发生了改变,只需要修改B中的代码即可
MultiWin2.py
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from NewDateDialog import NewDateDialog
class MultiWindow1(QWidget):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.resize(400, 100)
self.setWindowTitle("多窗口交互:使用信号和槽")
self.open_btn = QPushButton("获取时间")
self.lineEdit_inner = QLineEdit(self)
self.lineEdit_emit = QLineEdit(self)
self.lineEdit_inner.setText("接收子窗口内置信号的时间")
self.lineEdit_emit.setText("接收子窗口自定义信号的时间")
grid = QGridLayout()
grid.addWidget(self.lineEdit_inner)
grid.addWidget(self.lineEdit_emit)
grid.addWidget(self.open_btn)
self.setLayout(grid)
self.open_btn.clicked.connect(self.openDialog)
def openDialog(self):
dialog = NewDateDialog(self)
# 连接子窗口的内置信号与主题口的槽函数
dialog.datetime_inner.dateTimeChanged.connect(self.deal_inner_slot)
# 连接子窗口的自定义信号与主窗口的槽函数
dialog.Signal_OneParameter.connect(self.deal_emit_slot)
dialog.show()
def deal_inner_slot(self, date):
self.lineEdit_inner.setText(date.toString())
def deal_emit_slot(self, dateStr):
self.lineEdit_emit.setText(dateStr)
if __name__ == "__main__":
app = QApplication(sys.argv)
main = MultiWindow1()
main.show()
sys.exit(app.exec_())
NewDateDialog.py
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class NewDateDialog(QDialog):
Signal_OneParameter = pyqtSignal(str)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setWindowTitle("子窗口:用来发送信号")
# 在布局中添加部件
layout = QVBoxLayout(self)
self.label = QLabel(self)
self.label.setText('前者发射内置信号\n后者发射自定义信号')
self.datetime_inner = QDateTimeEdit(self)
self.datetime_inner.setCalendarPopup(True)
self.datetime_inner.setDateTime(QDateTime.currentDateTime())
self.datetime_emit = QDateTimeEdit(self)
self.datetime_emit.setCalendarPopup(True)
self.datetime_emit.setDateTime(QDateTime.currentDateTime())
layout.addWidget(self.label)
layout.addWidget(self.datetime_inner)
layout.addWidget(self.datetime_emit)
# 使用两个button(ok和cancel)分别连接accept() 和 reject()槽函数
buttons = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel,
Qt.Horizontal, self)
buttons.accepted.connect(self.accept)
buttons.rejected.connect(self.reject)
layout.addWidget(buttons)
self.datetime_emit.dateTimeChanged.connect(self.emit_signal)
def emit_signal(self):
date_str = self.datetime_emit.dateTime().toString()
self.Signal_OneParameter.emit(date_str)
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