问题描述
如何更新 QLIstWidget 以在添加项目时显示项目.
How to update QLIstWidget to show items as when when it is added.
就像我在循环中向 QListWidget 添加 100 个 QListWidgetItems 一样.所有这 100 个项目只有在循环完成后才可见.但我想知道是否可以在添加项目时显示项目.
Like i am adding 100 QListWidgetItems to QListWidget in a loop. All these 100 items are visible only after loop is completed. But i want to know if is it possible to show item as and when the item is added.
我尝试了 self.ListWidget.setUpdatesEnabled(True)
但没有成功.
I tried self.ListWidget.setUpdatesEnabled(True)
but no luck.
感谢任何帮助.
推荐答案
您可以在循环中重新绘制列表控件:
you can repaint the listwidget in the loop:
def insertItem(self):
for i in range(1,100):
self.listWidget.addItem(str(i))
self.listWidget.repaint()
使用 QTimer,您可以控制 2 个项目之间的延迟.
with QTimer you can control the delay between 2 items.
也许我没有正确理解你的问题:您可以添加所有项目,隐藏它们,然后将它们逐项设置为可见:
Perhaps i didn't understand your question correctly:you can add all items, hide them and then set them visible item by item:
import sys
from PyQt5 import QtGui, QtCore, QtWidgets
class MyWidget(QtWidgets.QWidget):
def __init__(self):
QtWidgets.QWidget.__init__(self)
self.setGeometry(200,100,600,900)
self.listWidget = QtWidgets.QListWidget(self)
self.listWidget.setGeometry(20,20,100,700)
self.pushButton = QtWidgets.QPushButton(self)
self.pushButton.setGeometry(20,800,100,30)
self.pushButton.setText('show Items')
self.pushButton.clicked.connect(self.showItems)
self.timer = QtCore.QTimer()
for i in range(0,100):
self.listWidget.addItem(str(i))
self.listWidget.item(i).setHidden(True)
self.z = 0
def showItems(self):
self.timer.start(100)
self.timer.timeout.connect(self.nextItem)
def nextItem(self):
try:
self.listWidget.item(self.z).setHidden(False)
self.listWidget.repaint()
self.z += 1
except AttributeError:
self.timer.stop()
self.z = 0
app = QtWidgets.QApplication(sys.argv)
widget = MyWidget()
widget.show()
sys.exit(app.exec_())
在pyqt4中用'QtGui'替换'QtWidgets'
in pyqt4 replace 'QtWidgets' by 'QtGui'
这篇关于如何更新 QListWidget的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!