PyQt5 QSpinbox – 拖动其中的文本并将其放到自定义标签上

在这篇文章中，我们将看到如何使用光标拖动旋转框的文本并将其放到给定的自定义标签中。拖放文本类似于将一个文件夹从一个目录拖到另一个目录，当我们这样做时，就会产生另一个副本。

为了做到这一点，我们必须做以下工作。

1.创建一个自旋盒

2.获取旋转盒的行编辑对象

3.对行编辑对象进行拖动启用

4.为自定义标签创建一个新的类，它继承了QLabel类

5.允许这个类接受拖放

6.给它添加拖放事件，这样它就可以接收文本并显示文本。

自定义标签类的语法

class CustomLabel(QLabel):
    # constructor
    def __init__(self, title, parent):
        super().__init__(title, parent)

        # enabling accept drops
        self.setAcceptDrops(True)

    # creating drag enter event to receive text
    def dragEnterEvent(self, e):

        # checking format of the text
        if e.mimeData().hasFormat('text/plain'):
            # accepting the text
            e.accept()

        else:
            # rejecting the text
            e.ignore()

    # drop event to showing the text to label
    def dropEvent(self, e):

        # setting text to the label
        self.setText(e.mimeData().text())

以下是实施情况

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
class Window(QMainWindow):
  
    def __init__(self):
        super().__init__()
  
        # setting title
        self.setWindowTitle("Python ")
  
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for widgets
    def UiComponents(self):
        # creating spin box
        self.spin = QSpinBox(self)
  
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 40)
  
        # setting prefix to spin
        self.spin.setPrefix("Prefix ")
  
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
  
  
        # get the line edit object
        line = self.spin.lineEdit()
  
        # set drag enable to true
        line.setDragEnabled(True)
  
        # creating a CustomLabel object
        label = CustomLabel('Drop here.', self)
  
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 30)
  
  
class CustomLabel(QLabel):
    # constructor
    def __init__(self, title, parent):
        super().__init__(title, parent)
  
        # enabling accept drops
        self.setAcceptDrops(True)
  
    # creating drag enter event to receive text
    def dragEnterEvent(self, e):
  
        # checking format of the text
        if e.mimeData().hasFormat('text / plain'):
            # accepting the text
            e.accept()
  
        else:
            # rejecting the text
            e.ignore()
  
    # drop event to showing the text to label
    def dropEvent(self, e):
  
        # setting text to the label
        self.setText(e.mimeData().text())
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())