我正在尝试使用QTreeWidget.setItemWidget()
在重新显示(拖放)之后将小部件放入QTreeWidgetItem中但是,如果编译以下代码,结果是QTreeWidgetItem内的窗口小部件消失了。 知道为什么吗?什么代码可以解决这个问题(我想用小部件重新填充QTreeWidgetItem?)
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class InlineEditor (QWidget):
_MUTE = 'MUTE'
def __init__ (self, parent):
QWidget.__init__ (self, parent)
self.setAutoFillBackground (True)
lo = QHBoxLayout()
lo.setSpacing(4)
self._cbFoo = QComboBox()
for x in ["ABC", "DEF", "GHI", "JKL"]:
self._cbFoo.addItem(x)
self._leBar = QLineEdit('', self)
lo.addWidget (self._cbFoo, 3)
lo.addSpacing (5)
lo.addWidget (QLabel ( 'Bar:'))
lo.addWidget (self._leBar, 3)
lo.addStretch (5)
self.setLayout (lo)
class Form (QDialog):
def __init__(self,parent=None):
QDialog.__init__(self, parent)
grid = QGridLayout ()
tree = QTreeWidget ()
# Here is the issue?
tree.setDragDropMode(QAbstractItemView.InternalMove)
tree.setColumnCount(3)
for n in range (2):
i = QTreeWidgetItem (tree) # create QTreeWidget the sub i
i.setText (0, "first" + str (n)) # set the text of the first 0
i.setText (1, "second")
for m in range (2):
j = QTreeWidgetItem(i)
j.setText (0, "child first" + str (m))
#b1 = QCheckBox("push me 0", tree) # this wont work w/ drag by itself either
#tree.setItemWidget (tree.topLevelItem(0).child(1), 1, b1)
item = InlineEditor(tree) # deal with a combination of multiple controls
tree.setItemWidget(tree.topLevelItem(0).child(1), 1, item)
grid.addWidget (tree)
self.setLayout (grid)
app = QApplication ([])
form = Form ()
form.show ()
app.exec_ ()
答案 0 :(得分:2)
设法通过编写我自己的treeDropEvent来获得相对“工作”的修复...但是如果有人有更优雅的解决方案,请随时分享。下面的代码将解决其他任何人在树中使用setItemWidgets进行拖放操作的麻烦,欢呼。
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class InlineEditor (QWidget):
_MUTE = 'MUTE'
def __init__ (self, parent):
QWidget.__init__ (self, parent)
self.setAutoFillBackground (True)
lo = QHBoxLayout()
lo.setSpacing(4)
self._cbFoo = QComboBox()
for x in ["ABC", "DEF", "GHI", "JKL"]:
self._cbFoo.addItem(x)
self._leBar = QLineEdit('', self)
lo.addWidget (self._cbFoo, 3)
lo.addSpacing (5)
lo.addWidget (QLabel ( 'Bar:'))
lo.addWidget (self._leBar, 3)
lo.addStretch (5)
self.setLayout (lo)
class Tree(QTreeWidget):
def __init__(self, parent=None):
QTreeWidget.__init__(self, parent)
# Here is the issue?
self.setDragDropMode(QAbstractItemView.InternalMove)
self.installEventFilter(self)
self.setColumnCount(3)
self.dropEvent = self.treeDropEvent
for n in range (2):
i = QTreeWidgetItem (self) # create QTreeWidget the sub i
i.setText (0, "first" + str (n)) # set the text of the first 0
i.setText (1, "second")
for m in range (2):
j = QTreeWidgetItem(i)
j.setText (0, "child first" + str (m))
self.item = InlineEditor(self) # deal with a combination of multiple controls
self.setItemWidget(self.topLevelItem(0).child(1), 1, self.item)
def treeDropEvent(self, event):
dragItem = self.currentItem()
QTreeWidget.dropEvent(self, event)
# rebuild widget (grabbing it doesnt seem to work from self.itemWidget?)
self.item = InlineEditor(self)
self.setItemWidget(dragItem, 1, self.item)
class Form (QDialog):
def __init__(self,parent=None):
QDialog.__init__(self, parent)
grid = QGridLayout ()
tree = Tree ()
grid.addWidget (tree)
self.setLayout (grid)
app = QApplication ([])
form = Form ()
form.show ()
app.exec_ ()
答案 1 :(得分:0)
我很想知道为什么,它也发生在我身上。
对于itemWidget,似乎“基础C / C ++对象已被删除”。无论如何,当我在小部件消失后再次尝试setItemWidget()时,我会得到什么,希望能解决它。
我放入了一个事件,当QTreeWidgetItem被删除时被调用但是它似乎一旦被删除就被删除
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class InlineEditor (QWidget):
_MUTE = 'MUTE'
def __init__ (self, parent):
QWidget.__init__ (self, parent)
self.setAutoFillBackground (True)
lo = QHBoxLayout()
lo.setSpacing(4)
self._cbFoo = QComboBox()
for x in ["ABC", "DEF", "GHI", "JKL"]:
self._cbFoo.addItem(x)
self._leBar = QLineEdit('', self)
lo.addWidget (self._cbFoo, 3)
lo.addSpacing (5)
lo.addWidget (QLabel ( 'Bar:'))
lo.addWidget (self._leBar, 3)
lo.addStretch (5)
self.setLayout (lo)
class Tree(QTreeWidget):
def __init__(self, parent=None):
QTreeWidget.__init__(self, parent)
# Here is the issue?
self.setDragDropMode(QAbstractItemView.InternalMove)
self.installEventFilter(self)
self.setColumnCount(3)
for n in range (2):
i = QTreeWidgetItem (self) # create QTreeWidget the sub i
i.setText (0, "first" + str (n)) # set the text of the first 0
i.setText (1, "second")
for m in range (2):
j = QTreeWidgetItem(i)
j.setText (0, "child first" + str (m))
#b1 = QCheckBox("push me 0", tree) # this wont work w/ drag by itself either
#tree.setItemWidget (tree.topLevelItem(0).child(1), 1, b1)
self.item = InlineEditor(self) # deal with a combination of multiple controls
self.setItemWidget(self.topLevelItem(0).child(1), 1, self.item)
def eventFilter(self, sender, event):
if event.type() == QEvent.ChildRemoved:
print self.item._cbFoo # looks like this remains
print self.item._cbFoo.currentText() # CRASH! but the data is gone
#self.setItemWidget(self.topLevelItem(0).child(1), 1, self.item)
return False
class Form (QDialog):
def __init__(self,parent=None):
QDialog.__init__(self, parent)
grid = QGridLayout ()
tree = Tree ()
grid.addWidget (tree)
self.setLayout (grid)
app = QApplication ([])
form = Form ()
form.show ()
app.exec_ ()