PyQt5 – 如何获得组合框中最大可见项的数量
在这篇文章中,我们将看到如何获得组合框的最大可见项的数量。默认情况下,在组合框的下拉列表中,一次最多有10个项目是可见的,尽管我们可以改变这个数字。为了获得最大可见项目的数量,我们使用maxVisibleItems方法。
语法: combo_box.maxVisibleItems()
参数: 它不需要参数
返回: 它返回整数
以下是实现方法
# 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 a combo box widget
self.combo_box = QComboBox(self)
# setting geometry of combo box
self.combo_box.setGeometry(200, 150, 120, 30)
# geek list
geek_list = ["Geek", "Geeky Geek", "Legend Geek", "Ultra Legend Geek"]
# adding list of items to combo box
self.combo_box.addItems(geek_list)
# setting max number visible limit
self.combo_box.setMaxVisibleItems(2)
# getting maximum visible limit
limit = self.combo_box.maxVisibleItems()
# creating label to show the count
label = QLabel("Max visible limit = " + str(limit), self)
# setting label geometry
label.setGeometry(200, 200, 200, 30)
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :