Python事多,做个笔记,区分。

PySide2 Signal Slot Test

from PySide2.QtWidgets import QMainWindow,QApplication,QWidget,QPushButton
from PySide2 import QtWidgets
from PySide2.QtCore import Slot, Signal import sys class MyCenWidget(QWidget): closeSignal = Signal() quitSignal = Signal() def __init__(self,parent = None):
super(MyCenWidget, self).__init__(parent)
# first create layout
self.createAndSetLayout()
# add widget to my layout
self.createButtons() def createAndSetLayout(self):
self.mainLayout = QtWidgets.QHBoxLayout()
self.setLayout(self.mainLayout) def createButtons(self):
self.closeBtn = QPushButton(self)
self.closeBtn.setText("Close")
self.closeBtn.clicked.connect(self.closeSignal) # 信号连接信号
self.mainLayout.addWidget(self.closeBtn) # Quit button settings
self.quitBtn = QPushButton(self)
self.quitBtn.setText("Quit")
self.quitBtn.clicked.connect(self.quitSlot)
self.mainLayout.addWidget(self.quitBtn) def quitSlot(self):
print("我的中心控件点了quit button")
self.quitSignal.emit() class MyWindow(QMainWindow):
def __init__(self):
super(MyWindow, self).__init__() # create my widget
self.setupMenuBar()
# bind my widget to function
self.accessMenuBar() # take my widget to here
cenWidget = MyCenWidget() # 野指针
cenWidget.closeSignal.connect(self.close) # 从我定义的窗口里发射的信号,这个是closeSignal
cenWidget.quitSignal.connect(self.close) self.setCentralWidget(cenWidget) # 基类有个函数让我设置它到我的QMainWindow def setupMenuBar(self):
parentMenuBar = self.menuBar() fileMenu = parentMenuBar.addMenu("File")
self.newAction = fileMenu.addAction("new") editMenu = parentMenuBar.addMenu("Edit")
self.undoAction = editMenu.addAction("undo") # make connection new action
def accessMenuBar(self):
self.newAction.triggered.connect(self.newSlot) @Slot(bool)
def newSlot(self, checked):
print("into my new slot") if __name__ == "__main__":
app = QApplication(sys.argv)
print("My window argv:", sys.argv)
w = MyWindow()
w.show()
app.exec_()

PyQt5 Reference Guide

http://pyqt.sourceforge.net/Docs/PyQt5/index.html

Qt4 signal:

class CopyFileThread(QtCore.QThread):
signal_process = QtCore.pyqtSignal(str, str, bool) def __init__(self, parent=None):
super(CopyFileThread, self).__init__(parent)
self.finished.connect(self.taskEnd) def setSourceAndDestination(self, src, des):
self.source = src
self.des = des
self.status = False def run(self):
#print "copy -> ", self.source, self.des
# QtCore.QFile.copy(self.source,self.des)
try:
shutil.copy(self.source, self.des)
self.status = True
except:
self.status = False def taskEnd(self):
self.signal_process.emit(self.source, self.des, self.status)

接受这个signal槽:

@QtCore.pyqtSlot(str, str, bool)
def perThreadCopyEnd(self, src, des, status):
self.taskNum += 1
if (status):
self.throwMessage(">>" + src + "\t->->->->\t" + des + "<<copy end")
else:
self.throwMessage(">>" + src + "\tT_T T_T T_T\t" + des + "<<copy failed")
if self.taskNum == len(self.sources):
self.throwMessage(">> process end")

Qt5展示的一些发射信号:

from PyQt5.QtCore import QObject, pyqtSignal

class Foo(QObject):

    # Define a new signal called 'trigger' that has no arguments.
trigger = pyqtSignal() def connect_and_emit_trigger(self):
# Connect the trigger signal to a slot.
self.trigger.connect(self.handle_trigger) # Emit the signal.
self.trigger.emit() def handle_trigger(self):
# Show that the slot has been called. print "trigger signal received"

信号重载

from PyQt5.QtWidgets import QComboBox

class Bar(QComboBox):

    def connect_activated(self):
# The PyQt5 documentation will define what the default overload is.
# In this case it is the overload with the single integer argument.
self.activated.connect(self.handle_int) # For non-default overloads we have to specify which we want to
# connect. In this case the one with the single string argument.
# (Note that we could also explicitly specify the default if we
# wanted to.)
self.activated[str].connect(self.handle_string) def handle_int(self, index):
print "activated signal passed integer", index def handle_string(self, text):
print "activated signal passed QString", text

QML:

<1> show 一个qml里的window

import QtQuick 2.0
import QtQuick.Window 2.2
import QtQuick.Controls 1
import QtQuick.Dialogs 1.2 Window
{
id:root
width:1280
height:720
Rectangle
{
id:rec
color:"#FF2020"
width:100
height:100
anchors.centerIn:parent
border.color:"#202020"
border.width:1
}
MouseArea
{
id:quitArea
anchors.fill:
{
rec
}
onClicked:
{
close()
}
} }

main.py:

from PyQt5 import QtWidgets,QtGui,QtCore
from PyQt5 import QtQml
from PyQt5.QtQuick import QQuickView,QQuickWindow import sys
if __name__ == "__main__":
app = QtGui.QGuiApplication(sys.argv) eng = QtQml.QQmlApplicationEngine()
eng.load(QtCore.QUrl.fromLocalFile('./UI/main.qml')) topLevel = eng.rootObjects()[0]
print topLevel
topLevel.show() app.exec_()

创建混合窗口:

按钮是QPushButton,下面的白色区域是QtQuickWindow

from PyQt5 import QtWidgets,QtGui,QtCore
from PyQt5 import QtQml
from PyQt5.QtQuick import QQuickView,QQuickWindow import sys
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv) eng = QtQml.QQmlApplicationEngine() eng.load(QtCore.QUrl.fromLocalFile('./UI/Main.qml')) topLevel = eng.rootObjects()[0]
print topLevel
#topLevel.show() layout = QtWidgets.QVBoxLayout()
button = QtWidgets.QPushButton()
button.setText("houdini")
layout.addWidget(button) mainWidget = QtWidgets.QWidget() quickWidget = QtWidgets.QWidget.createWindowContainer(topLevel)
#quickWidget.show()
mainWidget.setLayout(layout)
layout.addWidget(quickWidget)
mainWidget.show()
app.exec_()

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