How to encapsulate a pyqt5 class in Python
Today, I will talk to you about how to package a pyqt5 class in Python. Many people may not know much about it. In order to let everyone know more, Xiaobian summarized the following contents for everyone. I hope everyone can gain something according to this article.
I. Code encapsulation ideas
1. Analyze what code needs to be encapsulated: what needs to be encapsulated is the code we configure for the form.
2. Take advantage of inheritance properties of classes
3. Call constructor super() of parent class Qwidget.__ init__()
4. Don't forget to call your own custom method to initialize the UI
II. GUI position size function
GUI position size function using setGeometry
What it does: This function is equivalent to a combination of the resize function and the move function.
Function format:
Control object.setGeometry (X axis, Y axis, width, height)
III. Signal correlation
All signals on the form are monitored by app.exec_() loop.
A signal is just a statement in QT that something happened.
A slot is code executed for a specific event that occurs in QT.
The behavior of GUI on form is the behavior of some event, GUI is driven by event.
Simple and practical signal slot
Format: Signal source. signal.connet
Format explanation: signal source (button). signal (clicked).connet (an event method)
Examples:
#Set button click event to close form
btn.clicked.connect(self.close)
Note: In the process of binding signal slots, our slot method is unbracketed
IV. Summary and emphasis
1. Master the basic idea of class inheritance Qwidget
2. Master the class features cover initUI
3. Master setGeometry function
4. Master the use of simple signal slots
This section of knowledge source code:
import sysfrom PyQt5.QtWidgets import QWidget,QApplication,QPushButton
class MyClass(QWidget): def __init__(self): super().__ init__() self.initUI() def initUI(self): self.setWindowTitle("Liu Jinyu Programming") self.setGeometry(30,40,300,200) # self.resize(300,200) # self.move(30,40) btn=QPushButton("old Liu",self) btn.move(50,60) #Set button click event to close form btn.clicked.connect(self.close) self.show()
if __name__=="__main__": app=QApplication(sys.argv) mc=MyClass() app.exec_()
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