从布局中删除所有项目 [英] Remove all items from a layout
问题描述
我正试图找到一种采用qt布局并从中删除所有内容的东西.只是想像一下窗口是什么样子-我有:
I was trying to find something that would take a qt layout and delete everything from it. Just to imagine what the window looks like - I have:
QVBoxLayout
| ------QHboxLayout
|---------QWidget
| ------QHboxLayout
|---------QWidget
.........
因此,我需要我可以递归调用的东西,以清除并删除父母QVBoxLayout
中的所有内容.我尝试了此处提到的内容(清除pyqt中布局中的所有小部件),但它们都不起作用(无论如何都没有标记正确答案).我的代码如下:
So I need something that I can call recursively to CLEAR AND DELETE all the stuff from my parent QVBoxLayout
. I tried things mentioned here (Clear all widgets in a layout in pyqt) but none of them work (no correct answer marked anyway). My code looks like this:
def clearLayout(self, layout):
for i in range(layout.count()):
if (type(layout.itemAt(i)) == QtGui.QHBoxLayout):
print "layout " + str(layout.itemAt(i))
self.clearLayout(layout.itemAt(i))
else:
print "widget" + str(layout.itemAt(i))
layout.itemAt(i).widget().close()
但是它给出了一个错误:
But it gives an error:
layout.itemAt(i).widget().close()
AttributeError: 'NoneType' object has no attribute 'close'
=>编辑
这种方法有效(但如果Layout
以外的Layout
则没有其他作用:
=>EDIT
This kinda works (but doesn't if there is any other Layout
than HBoxLayout
:
def clearLayout(self, layout):
layouts = []
for i in range(layout.count()):
if (type(layout.itemAt(i)) == QtGui.QHBoxLayout):
print "layout " + str(layout.itemAt(i))
self.clearLayout(layout.itemAt(i))
layouts.append(layout.itemAt(i))
else:
print "widget" + str(layout.itemAt(i))
if (type(layout.itemAt(i)) == QtGui.QWidgetItem):
layout.itemAt(i).widget().close()
推荐答案
清除布局的最安全方法是使用 deleteLater :
The safest way to clear a layout is to extract the items with its takeAt method, and then explicitly delete any widgets with deleteLater:
def clearLayout(self, layout):
if layout is not None:
while layout.count():
item = layout.takeAt(0)
widget = item.widget()
if widget is not None:
widget.deleteLater()
else:
self.clearLayout(item.layout())
这篇关于从布局中删除所有项目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IT屋!